Cationic electrodepositable coating composition comprising lignin

FIELD: chemistry.

SUBSTANCE: invention relates to a cationic electrodepositable coating composition. The cationic electrodepositable coating composition comprises a film-forming resin and a lignin-containing cationic salt resin dispersed in water. The invention also relates to a cationic electrodepositable coating composition comprising water dispersed film-forming resin and a lignin containing film-forming resin wherein the lignin has not been reacted with a monofunctional compound and wherein the lignin comprises ≥5 wt % of the coating composition based on the total resin solids of the coating composition. The present invention is also directed to yet another method of making a cationic electrodepositable coating composition comprising: (i) reacting lignin and epichlorohydrin to form an intermediate reaction product, and then reacting the intermediate reaction product with an amine; and (ii) reacting the reaction product of (i) with an amine and an acid.

EFFECT: raw materials from renewable and/or inexpensive sources.

20 cl, 4 ex

 

Certain rights in this invention can have the U.S. government under contract number DE-FC36-05G085004 funded by the Department of energy.

The technical field to which the invention relates

The present invention generally relates to cationic electrocardiol coating containing lignin.

The level of technology

The prices of raw materials used in many industrial processes, continue to grow, especially for raw materials, the price of which is tied to the oil price. Because of this, and because of the predicted depletion of oil reserves may be in demand of raw materials from renewable resources and alternative sources. The increasing demand for environmentally friendly products, along with uncertain variables and petrochemical market, contributed to the development of the use of raw materials from renewable and/or low-cost sources.

Disclosure of the invention

The present invention relates to electrocardiol cationic coating composition comprising a lignin-containing cationic resin in salt form.

The present invention also relates to electrocardiol cationic coating compositions containing lignin, which reacted with a monofunctional compound.

The present invention also relates to electrocardiol cationic coating compositions containing leagues�Jn, in which the lignin has not interacted with a monofunctional compound and in which lignin is ≤5% of the mass. the composition of the coating relative to the total solids content of the resin composition of the coating.

The present invention also relates to a method for producing electrocardiol cationic coating composition comprising: (i) interaction of lignin, a carbonyl compound and amine, and (ii) interaction of the reaction product (i) with acid.

The present invention also relates to another method of producing electrocardiol cationic coating composition comprising: (i) interaction of lignin and epichlorohydrin with formation of an intermediate reaction product and then the interaction of the intermediate reaction product with an amine and (ii) interaction of the reaction product (i) with an amine and acid.

The present invention also relates to another method of obtaining electrocardiol cationic coating compositions, including the interaction of lignin and monofunctional compounds with the formation of the reaction product; and adding the reaction product to a cationic film-forming resin.

The implementation of the invention

In accordance with the use in the description, unless expressly indicated otherwise, all numbers such as those expressing values, ranges, amounts or percentage, mo�ut to be read, as if they were preceded by the word "about" even though the term is not specified. When referring to any numerical range of values, such ranges means that you include each and every number and/or fraction between the stated minimum and maximum range. For example, the range "1 to 10" includes any and all subranges between (and including) the specified minimum value of 1 and a specified maximum value of 10, which has a minimum value equal to or greater than 1, and a maximum value of equal to or less than 10. In accordance with the use in the description, the term "number" means one or an integer greater than one.

In accordance with the use in the description of plural expressions and terms covers their counterparts in the singular and Vice versa, unless specifically stated otherwise. As an illustration, not limitation, although the description mentions a "monofunctional compound", "Amin", "lignin"; the plural of these materials can be used in the present invention. In accordance with the use in the description of "many" means two or more.

In accordance with the use in the description "includes" and similar terms mean "including without limitation".

In accordance with the use in the description "or" means "and/or", unless specifically stated otherwise, even though "and/or" m�can be explicitly used in certain instances.

In accordance with the use in the description, the term "curing" refers to the process in which is capable of cross-linking components of the coating are at least partially crosslinked. In some realizations, the density of crosslinking is capable of cross-linking components (i.e., the degree of crosslinking) is 5-100%, such as 35-85% or, in some cases, 50 to 85% of full crosslinking. Specialists in the art it is clear that the presence and degree of crosslinking, i.e., the density of crosslinking can be determined in various ways, such as dynamic mechanical thermal analysis (DMTA) using a Polymer Laboratories MK III DMTA analyzer conducted under an atmosphere of nitrogen.

A reference to any monomer(s) in the description relates in General to the monomer which can be polymerized with another polymerizable component, such as another monomer or polymer. Unless otherwise indicated, it should be understood that once the monomer components react with each other to form a connection, the connection will include the balances of such monomer components.

Electrosurgery coating composition

As indicated above, the present invention relates to electrocardiol composition of the coating (electrodeposition or e-coating), which contains lignin. Lignin is a racemic macromolecule derived mainly from plants and trees�EV. In General, lignin is typically has a molecular weight exceeding 10000 daltons. Although the chemical composition of lignin can vary depending on its source and method of its extraction, lignin typically includes a group of phenolic polymers that include a large number of hydroxyl functional groups and aromatic rings. In addition to phenolic polymer, lignin may also include a carboxyl functional group, and methylene group. Although in the prior art there are various methods of extraction of lignin (see US 7,323,501, from column 7, line 12 to column 8, line 31 and from column 10, line 15 to column 24, line 26, the cited portion included in the description by reference), lignin is commercially available from various sources, such as Ligno Tech USA (Rothchild, WI), Tembec (Montreal, QC), Fraser Paper (Toronto, ON), MeadWestvaco (Richmond, VA) and KMT Lignin Chemicals (St. Albans, Hertfordshire).

In accordance with the use in the description of "lignin" refers to lignin and derivatives of lignin, including lignin Brauns, cellulolyticus lignin, acidolysis the fir, lignin milled wood lignin of Clusone, periodates lignin, Kraft lignin, Kraft lignin, organosolv lignin and lignin steam explosion, or any substance that is made entirely or partially of lignin or of any elements, monomers or other components are�applies its derivatives. Thus, the lignin must include lignin and/or any compound containing lignin or the remainder.

Lignin, disclosed in the description, forms part of electrocardiog coating compositions that can be deposited on a substrate and overiden for forming the coating layer. Although lignin can react and/or polymerize with other components (e.g., resin, epoxy functional group, a monofunctional compound) to form part electrocardiog coating composition, it can also be added to electrocardiog coating composition without interaction and/or polymerization with such components.

I: the reaction Product of lignin and monofunctional compounds

The present invention relates to electrocardiog coating compositions containing lignin, which reacted with a monofunctional compound. The reaction product of lignin and monofunctional compounds are sometimes referred to in the description as modified lignin or lignin derived.

The modified lignin will have reduced reactivity relative to other components that may be used in forming electrocardiol composition of the coating. For example, the modified lignin could have reduced reactivity relative to the epoxide�'s groups present in other materials (e.g., monomers with epoxy functional groups) used to form part electrocardiol composition of the coating. One of the potential advantages of reduced reaktionsprodukt modified lignin is that the probability of melirovanie coating compositions in the process of synthesis of the coating composition, for example during the synthesis of the resin, can be reduced and/or eliminated. Various monofunctional compounds can be used for the reaction with lignin. For example, the monofunctional alcohol (e.g., cellosolve or butylcarbamoyl) can be used for interaction with at least a part of carboxyl functional groups and/or active methylene group of the lignin, thereby making it essentially directionspanel. In other realizations monofunctional compound such as a mono-functional cyclic carbonate (e.g. ethylene carbonate, propylenecarbonate, butylaniline), can be used to communicate at least part of hydroxyl and/or carboxyl functional groups of the phenolic part of the lignin, thereby making these groups and/or fragments directionspanel. Other monofunctional compounds which can be used for modification of lignin on�prepared without limitations of simple monofunctional epoxides (for example, ethylene oxide, propylene oxide, butylenes), a monofunctional glycidyl ethers and esters (for example, phenylglycidyl ether, tert-butyleneglycol ether, 3-Ethylhexylglycerin ether, glycidyl ether neodecanoic acid), or a combination thereof.

Modified lignin, described in the previous paragraph, can be obtained by the interaction of lignin with a monofunctional compound in pure form or in the presence of an organic solvent. Suitable solvents that may be used include, without limitation, a ketone (e.g., methyl isobutyl ketone, methylmercaptan), aromatic hydrocarbons (e.g. toluene, xylene), glycol ethers (e.g., dimethyl ether of diethylene glycol), or combinations thereof. In some realizations the reaction is conducted at a temperature of 80-160°C for 30-360 minutes, using conventional catalysts, such as sodium hydroxide or iodide ethyltriphenylphosphonium to use monofunctional material or expenditure of all functional groups and/or lignin fragments, reactive to monofunctional material. In some realizations, however, it may be desirable to have a certain amount of remaining monofunctional material, and/or functional groups, and/or fragments of lignin, which can reagirovat�, which are reactive to monofunctional material. In some realizations the ratio of equivalents of reactants (for example, monofunctional epoxy group and/or a monofunctional group of the cyclic carbonate: the phenolic hydroxyl group of lignin) is usually from 1.00:0.50 mm to 0.50:1.00 to.

In some realizations the modified lignin is 10-40 wt.%, for example 20-30% of the mass. from electrocardiog coating composition relative to the total solids content of the resin composition of the coating.

II: Lignin-containing cationic resin in salt form

The present invention also relates to electrocardiog coating composition comprising a lignin-containing cationic resin in salt form. In accordance with the use in the description of "lignin-containing cationic resin in salt form" means a positively charged resin or polymer molecule, which includes the residue of lignin.

In one implementation of the lignin-containing resin in the salt form includes (A) the reaction product of: (i) lignin, (ii) an amine and (iii) carbonyl compounds. In this implementation of the reaction product of components (i), (ii) and (iii) are synthesized by the Mannich reaction, known in the art. Using the Mannich reaction of phenolic fragments of lignin can be functionalized and pre�cultivated in Mannich bases. These bases can then be neutralized with a neutralizing compounds, such as acids, thereby making the cationic lignin. Suitable acids that can be used as neutralizing compounds include without limitation acetic acid, formic acid, lactic acid, sulfamic acid, or combinations thereof.

In some realizations, the lignin used as component (i) may be modified lignin, described in the previous section. Accordingly, in some realizations lignin interacts with a monofunctional compound to reaction with components (ii) or (iii).

In other realizations lignin, which is not reacted with a monofunctional compound may be used as component (i). In these realizations, the type of lignin and the amount used in electrocardiol composition of the coating is chosen to minimize and/or eliminate the possibility of melirovanie in the synthesis of the coating composition, for example during the synthesis of the resin.

Suitable amines that can be used as component (ii) include, without limitation, dimethylamine, N-methylethanolamine, DEA, dimethylaminopropylamine, dictamen, aminopropyldimethylamine or a combination thereof.

Suitable carbonyl compounds that mo�ut to be used as component (iii), include without limitation formaldehyde, acetaldehyde, acetone, or combinations thereof.

In some realizations, the reaction mixture used for forming the product of (A) the reaction, does not contain any additional phenolic compounds (e.g., phenol, alkylphenol, kilfenora, resorcinol). That is, in these realizations lignin is the only compound that contains phenolic fragment.

In some realizations reaction used for producing the product of (A) the reaction is carried out at a temperature of 80-120°C for a time 60-360 minutes, for example 120-180 minutes. In other realizations of the conditions normally used for carrying out the Mannich reaction, known in the art, are used to form the product (A) reaction.

The reaction of manniche, which can be used for producing the product of (A) the reaction can be catalyzed by addition of a small amount of acid, such as hydrochloric acid, p-toluensulfonic acid, methanesulfonic acid, sulfamic acid, sulfuric acid, phosphoric acid, acetic acid, or combinations thereof, to a reaction vessel containing the components (i), (ii) and (iii).

In some realizations, the product of (A) the reaction is additionally interacts with the material with epoxy functional groups and/or phenolic material with PR�interstitial product which is then neutralized with a neutralizing compound, such as described above, thereby forming a lignin-containing cationic resin in salt form in accordance with the present invention. Suitable materials with epoxy functional groups, which can be used include without limitation EPON 828, EPON 1001 is an epoxy resin with functional groups, or combinations thereof. Suitable phenolic material that can be used include without limitation bisphenol a, bisphenol F or a combination thereof.

In other realizations lignin-containing cationic resin in the salt form contains (In) the reaction product of: (a) lignin, (b) epichlorohydrin and (C) amine, (C) amine, usually added after the interaction of the components (a) and (b) with each other. In these realizations lignin contains a number of phenolic fragments, which react with epichlorohydrin to obtain a lignin containing epoxy functional groups. Lignin with epoxy functional groups can then be made first cationic interaction of lignin with an amine, such as described above, a sulfide (e.g., thioether) or their combinations and then the interaction with the lignin neutralizing compounds, such as described above. Depending on the amine and/or sulfide is used in the reaction with the lignin with EP�xianyi functional groups, a neutralizing agent (e.g., acid) can be added to the lignin after the lignin will react with the amine and/or a sulfide or it can be added to the lignin in conjunction with the amine and/or sulphide.

In some realizations lignin described above in the description of component (i) can also be used as a lignin component (a). In addition, various amines described above for the component (ii) can also be used as amine component (C).

In some realizations of the response, used for the formation of the product (B) reaction is carried out at a temperature of 80-120°C for 60-360 minutes.

Can be used a catalyst to accelerate the formation of product (In) reaction. Suitable catalysts that may be used include without limitation sodium hydroxide, potassium hydroxide, sodium methoxide, or combinations thereof. In other realizations can be used catalysts suitable for use in reactions of phenolic materials (e.g., bisphenol A).

In some realizations, the product (B) reaction is additionally interacts with the material with epoxy functional groups and/or phenolic material with the formation of the intermediate product, which is then neutralized with a neutralizing compound, such as described above, forms�Rui thereby the lignin-containing cationic resin in salt form in accordance with the present invention. Suitable materials with epoxy functional groups, which can be used include without limitation EPON 828, EPON 1001 is an epoxy resin with functional groups, or combinations thereof. Suitable phenolic material that can be used include without limitation bisphenol a, bisphenol F or a combination thereof. However, in some realizations, the materials used for the synthesis of product (In) response did not include the aldehydes and/or ketones.

Although the lignin-containing cationic resin in the salt form was described as containing reaction products of (A) or (B), in some realizations, the lignin-containing cationic resin in salt form can also include a combination of (A) and (B).

Lignin-containing cationic resin in salt form in some realizations is ≥50% of the mass. electrocardiog coating composition relative to the total solids content of the resin. In some realizations lignin-containing cationic resin in the salt form amounts to 60-70% of the mass. from electrocardiog coating composition relative to the total solids content of the resin. In other realizations lignin-containing cationic resin in salt form, comprising the product of (I) the reaction may reach 60-90% wt., for example 70-80% of the mass. from electrocardiog coating compositions contain a relatively common�ing solids of resin.

III: Lignin, which is not reacted with a monofunctional compound

The present invention also relates to electrocardiog coating composition comprising lignin, in which the lignin reacted with a monofunctional compound. Unlike the above-described modified lignin in the implementation of the reactivity of lignin in relation to other components used in the coating composition is not modified (e.g. reduced) because it has not interacted with mono-functional compounds described in the present application. Accordingly, the lignin is relatively more reactive compounds with epoxy functional groups, the modified lignin. Although lignin is described in this paragraph, not interacted with another compound, such as a monofunctional compound, it does not mean the exclusion of the involvement of lignin in other reactions in the processing of lignin. That is, before the incorporation of lignin in electrocardiol composition coatings, supplier of lignin could subject lignin other chemical reactions, such as reactions pre-processing.

To reduce the possibility of melirovanie electrocardiog coating compositions in these realizations lignin is ≤5% wt., for example 3-5% wt., from to�notizie coating relative to the total solids content of the resin composition of the coating.

Other components of the composition coating

In General, electrosurgery coating composition prepared by dispersing the first and second components in aqueous solution, thus forming electrocardiol composition of the coating. Suitable aqueous solution, which can be dispersed components is water, for example deionized water.

In General, the first component, which can be described as primary storage ("material transparent resin") includes a film-forming resin or polymer and a curing agent (also known as "crosslinking agent"), which is able to react with a film-forming resin. The first component may also include additional dispersible in water, non-pigmented components (e.g., catalysts, light stabilizers based on sterically obstructed amines). A wide range of film-forming resins can be used provided that the film-forming resins are dispersible in water." In accordance with the use in the description of "dispersible in water" means that the material is fit for solubilization, dispersing and/or emulsifying in water. Examples of film-forming resins suitable for use in the present invention include without limitation resins or polymers derived from polyepoxide, acrylic compounds, polio�ETANA, complex polyester or combinations thereof. In some realizations film-forming resin may contain functional groups. In accordance with the use in the description of the "functional group" or "reactive functional group" means a hydroxyl, carboxyl, carbamate, epoxy, isocyanate, acetoacetate, salt amine, mercaptan, or combinations thereof. The above-described film-forming resin also have an ionic nature. In particular, film-forming resins are cationic. In other words, film-forming resin comprises cationic salt groups are usually obtained by neutralization of the functional groups of the film-forming polymer acid that enables the electrodeposition of film-forming polymer on the cathode. For example, in some realizations of film-forming cationic resin or polymer can be obtained first reaction polyepoxides polymer with an amine, such as described above, 1,5,7-diazabicyclo[5.5.0]Dec-5-ene (TBD), sulfides, or their combinations, with subsequent interaction of the polymer with acid. Depending on the compounds used in the reaction with resin with epoxy functional groups, an acid can be added to the resin or after the interaction of the resin with an amine, TBD, and/or sulfide, or it may be added to the resin together with these Conn�the procedure.

In some realizations of the above-described film-forming resin may be lignin-containing cationic resin in salt form, as described in the application, or it can be a combination of lignin-containing cationic resin in a salt form with another film-forming resin. For example, lignin-containing cationic resin in the salt form can be used together with epoxy resin with functional groups known to the prior art.

Alternative to other realizations lignin-containing cationic resin in a salt form described in section II above, may be all or part of a film-forming resin described in the preceding paragraphs. Accordingly, in some realizations lignin-containing resin in a salt form described in section II (in particular, obtained from the product (In) response) can be used instead of epoxy resin with functional groups that are commonly used as film-forming polymer in electrosurgery coating compositions of prior art.

In some realizations lignin described in sections I, II and/or III above, is added to the first component. In particular, in these realizations, the lignin is added to a reaction vessel in which you prepare the film-forming resin. When add the lignin will depend on a number of factors, �such as whether the lignin, described in section I or III used in electrocardiog coating compositions, since the monomers with epoxy functional groups, typically used to form film-forming resins. Accordingly, depending on reaktionsprodukt lignin to the epoxy functional groups of lignin can be added at the beginning or at the end of the synthesis of film-forming resin.

As indicated above, the first component also includes a curing agent which is reactive with respect to this film-forming resin described in the previous paragraph. For example, the crosslinking agent may contain fragments that are relatively reactive functional groups of the film-forming polymer. Suitable crosslinking agents that may be used include, without limitation, the aminoplasts, polyisocyanates (including blocked isocyanates), polyepoxides, beta-hydroxyalkylated, polyacid, anhydrides, ORGANOMETALLIC materials with acidic functional groups, polyamines, polyamides, cyclic carbonates, siloxanes or combinations thereof. In some implementation, the curing agent may be 30-40% of the mass. relative to total solids of the resin composition of the coating.

In some implementation, the first component may optionally include �utilizator curing, which can be used for the catalysis of a reaction between the crosslinking agent and film-forming polymer. In some realizations of the cyclic guanidine of the present invention can act as a catalyst for curing. In some realizations of the cyclic guanidine is the only curing catalyst in the coating composition, while in other realizations of the cyclic guanidine is one of several the curing catalyst in the coating composition. Suitable curing catalysts that may be used in the present invention include without limitation ORGANOTIN compounds (e.g., oxide dibutylamine, oxide dactylology) and salts thereof (e.g., the diacetate dibutylamine); oxides of other metals (e.g., cerium oxide, zirconium and/or bismuth) and salts thereof (e.g., sulfamic bismuth and/or bismuth lactate), or combinations thereof.

In General, the second component, which can be described as the carrier of the dispersed substances ("pigment paste"), contains a pigment (e.g., titanium dioxide, natural gas soot), dispersible in water milled resin, which may be the same or different from the film-forming polymer, and optionally, additives such as catalysts, antioxidants, biocides, defoamers, surfactants�, wetting agents, dispersing additives, clay, light stabilizers based on sterically obstructed amines, absorbers and UV light stabilizers, stabilizers, or combinations thereof. All these materials are well known to those skilled in the art.

Coating system

Composition electrocardiog coating described in the application, can be applied alone or as part of a system of coatings that can be deposited on various substrates. Coating system typically includes multiple layers of coating. The coating layer is usually formed when the composition of the coating applied to the substrate, essentially overiden ways known to the prior art (e.g., by heating).

Suitable substrates that can be coated with the composition electrocardiog coating of the present invention, include without limitation, metal substrates, substrates of metal alloys and/or metal-coated substrate, such as plastic, metallic, or Nickel. In some realizations, the metal or metal alloy may be aluminum and/or steel. For example, the steel substrate can be cold rolled steel, galvanized steel, and steel hot-dip galvanizing. In addition, in some realizations, the substrate may form part of a vehicle such as a car body transport CP�of DSTV (for example, without limitation, door, body panel, trunk lid, roof panel, hood and/or roof) and/or frame of the vehicle. In accordance with the use in the description of a "vehicle" or its modifications include, but are not limited to, civil, commercial and military ground vehicles, such as cars, motorcycles and trucks. It should also be understood that in some realizations, the substrate may be pretreated with a solution of preprocessing, such as a solution of zinc phosphate, as described in US 4,793,867 and 5,588,989. Alternative in other realizations of the substrate is not pre-treated with a solution of preprocessing before applying to the substrate the coating composition described in the application.

In certain realizations composition electrocardiog coating of the present invention is applied to a clean (i.e. not pre-processed) of the substrate. However, in some realizations composition electrocardiog coating of the present invention may be deposited on the pretreated substrate. After curing of the composition electrocardiog coating composition of the primer-putty is applied, at least part of the composition electrocardiog coverage. The composition of the primer-filler is usually applied to the layer electrocardiog coating and cured� subsequent to applying the coating composition on the composition of the primer-filler.

A layer of primer filler is obtained from the composition of the primer-filler to increase the resistance to peeling of coating systems, and to improve the appearance of the subsequently applied layers (for example, the composition of the coating, which imparts color and/or essentially transparent coating composition). In accordance with the use in the description of "primer filler" refers to a primer composition for use under the applied composition further coverage and includes such materials as thermoplastic and/or sew (e.g., thermosetting) film-forming resins known in the art. Suitable compositions of the primers and primer fillers include primer, applied by spraying, as is well known to specialists in this field of technology. Examples of suitable primers include some supplied by PPG Industries, Inc, Pittsburgh, Pa, such as DPX-1791, DPX-1804, DSPX-1537, GPXH-5379, OPP-2645, PCV-70118 and 1177-A. Other suitable composition primer-filler, which can be used in the present invention is a primer filler, is described in US 11/773,482, which is incorporated into the description fully by reference.

It should be noted that in some realizations, the composition of the primer-filler is not used in the coating system. Therefore, the composition of the base coating, which imparts color, can be applied directly to the cured composite� electrocardiog coverage.

In some realizations the composition of the coating, which imparts color (the "base coat"), causing at least a portion of the coating layer of the primer-filler (if present). Any base coat composition of the prior art can be used in the present invention. It should be noted that the base coating composition typically includes a colorant.

In certain realizations composition is essentially transparent coating (hereinafter "transparent coating") is applied to at least a portion of a layer of base coat. In accordance with the use in the description "substantially transparent coating layer is essentially transparent and not opaque. In certain implementation, the composition is essentially transparent coating may include a dye, but not in such quantity as to make the composition clear coat in matte (essentially opaque) coating after cure. Any transparent coating composition of the prior art can be used in the present invention. For example, a transparent coating composition, which is described in US 5,989,642, 6,245,855, 6,387,519 and 7,005,472 that are included in their entirety in the description by reference, can be used in the coating system. In certain implementation, the composition is essentially transparent coating so�e may include particles, such as particles of silicon dioxide, which is dispersed in the transparent coating composition (for example, on the surface of the transparent coating composition after curing).

One or more coating compositions described in the application, can include dyes and/or other optionally used materials developed formulations of coatings of the prior art. In accordance with the use in the description, the term "colorant" means any substance that imparts color composition, and/or other opacity and/or other visual effect. A colorant may be added to the coating in any suitable form, such as discrete particles, dispersions, solutions and/or flakes (e.g. aluminum flakes). A single colorant or a mixture of two or more dyes can be used in coating compositions described in the application.

Example coloring agents include pigments, dyes and tints, such as used in the industry of dyes and/or listed by the Association of manufacturers of dry colorants (DCMA), as well as compositing special effects. A colorant may include, for example, finely ground solid powder, which is insoluble but wettable under the conditions of use. Colorant m�can be organic or inorganic and can be agglomerated or non-agglomerated. The dyes can be incorporated into coatings with milled using media such as acrylic ground media, the use of which is known to specialists in this field of technology.

Example pigments and/or pigment composition includes, but is not limited to, carbazole dioxazine crude pigment, azo, monoazo, disazo, naphthol AS, salt type (lacquers), benzimidazolone, condensation, metal complex, isoindoline, isoindoline and polycyclic phthalocyanine, hinoklidina, perylene, perinone, dicatorial a pyrrole, thyoindigo, anthraquinone, indanthrene, Interperiodica, plantroom, printroom, anthanthrene, dioxazine, triamterene, genoptonline pigments, diketopiperazines red ("DPPBO, red"), titanium dioxide, gas carbon black and mixtures thereof. The terms "pigment" and "colored filler" can be used interchangeably.

Example dyes include, but are not limited to dyes solvent-based and/or water, such as phthalo green or blue, iron oxide, bismuth Vanadate, anthraquinone, perylene, aluminum and chinagreen.

Example tints include, but are not limited to pigments, dispergirovannykh in the media water-based or water-miscible, such as AQUA-CHEM 896 commercially supplied by Degussa, Inc., CHARISMA COLORANTS and MAXITONER INDUSTRIAL COLORANTS, commercial�and supply the Department with Accurate Dispersions Eastman Chemical, Inc.

As stated above, the colorant can be in the form of a dispersion including, but not limited to the dispersion of the nanoparticles. Dispersion of the nanoparticles may include highly dispersed nanoparticles of one or more dyes and/or particles of pigments that produce a desired visible color and/or haze and/or visual effect. Dispersion of the nanoparticles may include colorants, such as pigments or dyes with a particle size of less than 150 nm, such as less than 70 nm, or less than 30 nm. Nanoparticles can be obtained by the grinding of organic or inorganic pigments, abrasive environment with a particle size of less than 0.5 mm. Example dispersions of nanoparticles and methods for their manufacture are disclosed in US 6,875,800, which is included in the description by reference. Dispersion of the nanoparticles can also be produced by crystallization, precipitation, condensation from the gas phase and chemical etching (i.e., partial dissolution). To minimize re-agglomeration of the nanoparticles in the coating, can be used dispersion of nanoparticles coated with resin. In accordance with the use in the description of the dispersion of the nanoparticles coated with resin" refers to a continuous phase in which are dispersed discrete composite microparticles" that comprise a nanoparticle and a resin coating on the nanoparticle. An example of dispers�nd nanoparticles covered with resin, and methods for their manufacture are disclosed in US 2005-0287348, filed June 24, 2004, US 60/482,167 filed June 24, 2003 and US 11/337,062, filed January 20, 2006, which is also included in the description by reference.

The example compositions, creating special effects that can be used include pigments and/or compositions that produce one or more visual effects such as reflection, pearl effect, metallic sheen, phosphorescence, fluorescence, photochromism, photosensitivity, thermochromism, goniochromism and/or color change. Composition, creating additional special effects can provide other visible properties, such as opacity or texture. In non-limiting implementation of a composition that creates special effects that can cause a change in color, so the color of the coating changes when the coating is viewed at different angles. The example compositions, colour effects disclosed in US 6,894,086 included in the description by reference. Composition, creating additional color effects can include transparent coated mica and/or synthetic mica, coated silica, coated alumina, a transparent liquid crystal pigment, a liquid crystal coating, and/or any composition in which the interference is the result of differences� refractive index in the material, and not because of a difference of refractive index between the material surface and the air.

In certain non-limiting the implementation of the photosensitive composition and/or photochromic composition, which reversibly change their color when illuminated by one or more light sources, can be used in coating compositions described in the application. Photochromic and/or photosensitive compositions can be activated by the irradiation of a predetermined wavelength. Upon excitation of the composition changes the molecular structure and the modified structure has a new color that is different from the original color of the composition. Upon termination of the irradiation of the photochromic and/or photosensitive composition can return to a stable state, which reverts to the original color of the composition. In one non-limiting implementation of photochromic and/or photosensitive composition can be colorless in the unexcited condition and painted in the excited state. Full color change can take place over time, from milliseconds to several minutes, for example 20 to 60 seconds. Example photochromic and/or photosensitive compositions include photochromic dyes.

In non-limiting implementation of a photosensitive and/or photochromic composition can be associated and/or at least partially tie�; for example, by a covalent bond to the polymer and/or polymeric materials of a polymerizable component. In contrast to some coatings in which the photosensitive composition may migrate out of the coating and crystallize on the substrate, photosensitive and/or photochromic composition associated with and/or at least partially bound to the polymer and/or polymerizable component in accordance with non-limiting implementation of the present invention, the minimum moves from the coating. An example of a photosensitive and/or photochromic compositions and methods for their manufacture are disclosed in US 10/892,919, filed July 16, 2004.

Basically, the dye may be present in any amount sufficient to impart the desired visual and/or color effect. A colorant can range 1-65 wt%. from the present compositions, such as 3-40% by weight. or 5-35% wt., the total weight of the compositions.

The coating composition can include other optional materials developed formulations of coatings of the prior art, such as plasticizers, antioxidants, light stabilizers based on sterically obstructed amines, absorbers and UV light stabilizers, surface-active substances, means of controlling the yield stress, thixotropic regulators such as bentonite�Wai clay, pigments, fillers, organic co-solvents, catalysts, including phosphonic acids and other conventional auxiliary substances.

In addition to the above materials, the coating composition may also include an organic solvent. Suitable organic solvents that can be used in coating compositions include any of those listed in the previous paragraphs, as well as butyl acetate, xylene, methyl ethyl ketone or

combination.

It should be understood that one or more coating compositions that form the various coating layers described in the application, can be either "one component" ("1K"), "two-component" ("2K"), or even multi-component composition. It should be understood that 1K composition refers to compositions in which the components of the coating are contained in the same container after manufacture, during storage, etc. Should be understood that 2K or multicomponent composition refers to compositions in which the various components are separated just prior to use. The composition of the coating 1K or 2K can be deposited on a substrate and overiden any conventional means, such as heating, compressed air, etc.

The composition of the coating, which form the various coating layers described in the application, can be deposited on a substrate with use�using any of the methods known to the prior art. For example, the composition of the coating can be deposited on a substrate by any of many methods, including, without limitation, spraying, application by brush, dip and/or application by roller among other ways. When multiple coating compositions deposited on a substrate, it should be noted that a coating composition can be applied to at least a portion of the underlying coating composition or after curing the underlying composition coating or curing the underlying coating composition. If the coating composition is applied to the underlying coating composition that has not been overiden, both the composition of the coating can be solidified at the same time.

The coating composition can be solidified using any of the methods known to the prior art, for example without limitation thermal energy, infrared, ionizing or actinic radiation, or any combination of these. In certain implementation, the curing operation can be performed at temperatures ≥10°C. In other implementation, the curing operation can be performed at a temperature of ≤246°C. In certain implementation, the curing operation can be performed at temperatures ranging between any combination of values specified in the preceding sentences, including the specified values. For example, the operation of�approval can be performed at temperatures of 120-150°C. However, it should be noted that lower or higher temperatures may be used if required to activate the curing mechanisms.

In specific implementation, one or more coating compositions described in the application, are low-temperature, cured in wet conditions the compositions of the coating. In accordance with the use in the description, the term "low-temperature, cured in wet conditions" refers to coating compositions that, after application to the substrate, capable of curing in the presence of ambient air with relative humidity 10-100%, such as 25-80%, and a temperature in the range from 10 to 120°C, for example from 5 to 80°C, in some cases 10 to 60°C and in other cases from 15 to 40°C.

Dry film thickness of the coating layers described in the application, may be 0.1-500 microns. In other realizations, the dry film thickness can be ≤125 microns, for example ≤80 microns. For example, the dry film thickness can range 15-60 microns.

Although a particular embodiment of the invention is described in detail, specialists in the art it should be clear that various modifications and alternatives to those details could be developed in the light of the full scope of the disclosure. Accordingly, certain disclosed structure is intended only for illustrative not limit both the scope of the claims of the invention, which is fully described in the attached claims and its equivalents.

Examples

Example 1

Lignin, a product of the Mannich reaction

# MaterialParts of the mass.
1 Black Kraft lignin1270,0
2 Morpholine405,6
3 35% water. formaldehyde11,4

Put the Baikal pulp and paper mill, 25% solids.

Materials 1, 2 and 3 are placed in a round bottom flask equipped with a mechanical stirrer, a refrigerator, a receiver, a temperature sensor and sparging with an inert gas. The mixture was then heated to 85°C and stirred for 4 hours. Then the reaction mixture was cooled to 25°C and pH was adjusted to 3.6 4N hydrochloric acid to precipitate the reaction product. The product was filtered, washed with water, ethanol and diethyl ether and dried under vacuum to give 20.1 parts of a brown powder.

Example 2

Carbamate crosslinking agent

# MaterialParts of the mass.
1 Bisexualteen1 1342,60
2 Propylenecarbonate1274,84
3 isobutyl ketone1121,76
Total3971,95

DYTEK BHMT-HP supplied INVISTA.

1 was charged into the reactor in a nitrogen atmosphere, stirred and heated to 40°C. 2 are added dropwise at such a speed as to keep the temperature below 70°C. the Mixture was kept at 70°C to complete the reaction, as indicated by a constant holding mEq amine. Then add 3 and the material is dispensed.

Example 3

Cationic additives

# MaterialParts of the mass.
1 EPON 8281458,31
2 bisphenol a167,25
3 methyl isobutyl ketone (MEK)70,00
4 Iodide ethyltriphenylphosphonium0,60
5 Carbamate crosslinking agent from example 2399,24
6 DEA7,86
7 Ketamin28 Butylcarbamoyl3122,44
9 methyl isobutyl ketone (MEK)38,34

LEpoxy resin, supplied by Hexion Specialty Chemicals.

2Deletemin from Diethylenetriamine at 72.7 per cent in the IEC.

3Supplied as MAZON 1651 BASF Corporation.

Materials 1, 2, and 3 load 4 is at a flask equipped with a stirrer, a temperature sensor, a protective layer (pillow) N2and heated to 110°C. When the mixture becomes uniform, add material 4 and the mixture was heated to 125°C, from that moment she becomes exothermic. The reaction mixture was allowed to warm to 160-180°C, incubated for one hour and then cooled to 115°C. Add material 5 and the mixture is heated to 115°C and incubated for 30 minutes, then add the materials 6 and 7 and the mixture was incubated for 2 hours at 115°C. Then the reaction mixture was diluted materials 8 and 9 to cationic additives.

Example 4

Dispersion of cationic lignin

# MaterialParts of the mass.
1 Cationic additive of example 2302,60
2 Butylcellosolve 48,00
3 Isopropanol42,00
4 the Mannich Adduct of lignin in example175,00
5 Deionized water135,00
6 glacial acetic acid17,25
7 methyl isobutyl ketone (MEK)30.00
8 Deionized water2013,2

Materials 1, 2, 3 and 4 are charged into a round bottom flask and stirred and heated to 83°C. once the temperature reaches 83°C, add items 5, 6 and 7, was stirred and heated for 1 hour and 40 minutes. Stirring was continued and the mixture is then diluted material 8 to get electrocardiol cationic dispersions with pH 4,34 and conductivity 1376 µs (micromo).

1. Cationic electrosurgery coating composition containing an aqueous dispersion containing a film-forming resin and curing agent, in which the specified film-forming resin contains a lignin-containing cationic resin in salt form.

2. Cationic electrosurgery coating composition according to claim 1, in which the lignin-containing cationic resin in salt form comprises: (A) the reaction product of lignin, an amine and Carbo�ilen connection; (B) the reaction product of lignin with epichlorohydrin and amine or (C) a combination thereof.

3. Cationic electrosurgery coating composition according to claim 2, in which the lignin was provzaimodeystvuet with a monofunctional compound before reaction with the amine or carbonyl compound in obtaining the reaction product (A), and/or in which the lignin was provzaimodeystvuet with a monofunctional compound before reacted with epichlorohydrin or an amine in obtaining the reaction product (B).

4. Cationic electrosurgery coating composition according to claim 3, in which the monofunctional epoxide compound contains, a cyclic carbonate or a combination thereof.

5. Cationic electrosurgery coating composition according to claim 4, in which the monofunctional epoxide comprises ethylene oxide, propylene oxide or a combination thereof.

6. Cationic electrosurgery coating composition according to claim 4, in which the monofunctional cyclic carbonate includes ethylene carbonate.

7. Cationic electrooxidative coating according to claim 2, wherein the carbonyl compound used in the preparation of the reaction product (A) comprises formaldehyde, and amine includes dimethylaminopropylamine.

8. Cationic electrooxidative coating according to claim 2 in which the amine used in the preparation of the reaction product (B) contains methylethanolamine.

9. Cationic electros�edema coating composition according to claim 2, in which the reaction product (A) or (B) was further provzaimodeystvuet with resin with epoxy functional groups.

10. Cationic electrosurgery coating composition according to claim 1, in which the lignin-containing cationic resin in salt form is ≥50% of the mass. the composition of the coating relative to the total solids content of the resin composition of the coating.

11. Cationic electrosurgery coating composition containing the aqueous dispersion containing the cationic film-forming resin, a curing agent and the reaction product of lignin and monofunctional compounds.

12. Cationic electrosurgery coating composition according to claim 11, in which the monofunctional epoxide compound contains, a cyclic carbonate or a combination thereof.

13. Cationic electrosurgery coating composition according to claim 12, in which the monofunctional epoxide comprises ethylene oxide, propylene oxide or a combination thereof.

14. Cationic electrosurgery coating composition according to claim 12, in which the monofunctional cyclic carbonate includes ethylene carbonate.

15. Cationic electrosurgery coating composition according to claim 11, in which the reaction product was further provzaimodeystvuet with resin with epoxy functional groups.

16. Cationic electrosurgery coating composition according to claim 12 in which the reaction product SOS�ulation of 20-30% of the mass. the composition of the coating relative to the total solids content of the resin composition of the coating.

17. Cationic electrosurgery coating composition containing an aqueous dispersion containing a film-forming resin and curing agent, in which the specified film-forming resin contains lignin, which is not reacted with a monofunctional compound, at a level of ≤5 wt%. the composition of the coating relative to the total solids content of the resin composition of the coating.

18. A method of producing electrocardiol cationic coating composition according to claim 1, comprising: dispersing in an aqueous solution of lignin-containing resin and a hardener, wherein said lignin-containing resin contains a product obtained from (i) the interaction of lignin, a carbonyl compound and amine, and (ii) interaction of the reaction product (i) with acid.

19. A method of producing electrocardiol cationic coating composition according to claim 1, comprising: dispersing in an aqueous solution of lignin-containing resin and a hardener, wherein said lignin-containing resin contains a product obtained from (i) the interaction of lignin and epichlorohydrin for the formation of the intermediate reaction product and the subsequent interaction of the intermediate reaction product with an amine and (ii) interaction of the reaction product (i) with an amine and �ilotol.

20. A method of producing electrocardiol cationic coating composition according to claim 11, comprising dispersing in an aqueous solution of the specified film-forming resin, the specified curing agent and the specified product obtained by the interaction of lignin and monofunctional compound to obtain a reaction product; and adding said product of reaction to cationic film-forming resin.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to a method of electroplating a substrate that has not undergone pretreatment. The method includes (a) contacting at least part of substrate material with a solution containing a copper source and water, where the solution is substantially free of a group IIIB metal source and a group IVB metal source, (b) bringing at least part of the substrate into contact with an electroplating composition containing (i) a film-forming resin and (ii) a yttrium source. Also described is a coated substrate and a method of electroplating a substrate, which includes (a) contacting at least part of substrate material with a solution containing a copper source, water and at least one substance selected from acids and surfactants, followed by contacting at least part of the substrate with an electroplating composition.

EFFECT: corrosion resistance of the substrate material without a compulsory pretreatment step.

20 cl, 9 tbl, 10 ex

FIELD: chemistry.

SUBSTANCE: invention relates to method of obtaining cyclic guanidine, which can be applied in coating compositions, in particular in electrically precipitated coating compositions. Method includes reaction of (i) cyanamide, (ii) polyamine and (iii) weak acid with 5.0<pKa<13.5. Invention also relates to method of obtaining polymer resin and method of obtaining cyclic guanidine, containing 6-membered ring.

EFFECT: claimed method makes it possible to reduce amount of wastes in production of cyclic guanidines.

18 cl, 1 tbl, 15 ex

FIELD: chemistry.

SUBSTANCE: invention relates to composition of electrically precipitated coating, which contains resin, possessing cationic salt group, containing reactionable functional groups, and additive of the following structural formula:

,

where R1, R2, R3, R4, R5 and R6 contain -(C(RI)HCH2O)m-RII; where m equals 0, 1, 2 or 3, RI represents H or has from 1 to 6 carbon atoms, and RII has from 4 to 18 carbon atoms or represents CH2-CH2-Y-RIV, where Y contains O, S or -C(O)NRIII, where RIII represents H or has from 1 to 6 carbon atoms; and RIV represents H or has from 1 to 18 carbon atoms; and where, at least, one of R1, R2, R3, R4, R5 and R6 contains: H as RI, RII has 4 carbon atoms, and m=1, 2 or 3; and where, at least, one of R1, R2, R3, R4, R5 and R6 contains: H as RI, RII has 4 carbon atoms, and m=0. Resins, possessing cationic salt group, are produced from polyepoxide, acrylic acid, polyamide, polyurethane, polyether or their combination. Also described is substrate, which has, at least, partial coating from composition of electrically precipitated coating, containing additive of structural formula (I), and method of obtaining composition of electrically precipitated coating.

EFFECT: resistance to formation of holes in composition of electrically precipitated coating and improvement of covering coating adhesion.

16 cl, 3 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: described is an electroconductive thermoplastic material for electrotyping, which contains a binding substance and electroconductive filler, where the binding substance is a mixture of polyethylene wax and paraffin in ratio of 2/1 to 1/3, and the electroconductive filler is graphite, with the following ratio of components, pts.wt: polyethylene wax 10-20, paraffin 10-30, graphite 60-70.

EFFECT: material enables free casting of an original article with electroconductive material when making a mould at low temperature and simplifies the technology of making moulds.

1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to aqueous compositions for making thin, chemical-resistant coatings by cathode electrodeposition on articles with an irregular shape, used in acidic media in abrasive load conditions (pumps, oil engineering etc). The composition is a paint system which contains the following components in the given ratios: 100 epoxy amine adduct as binder, 28-32 pigment paste (100%), 16-17 fluorinated rubber latex SKF-264V (60-70%), 2.5-3.1 powdered polyphenylene sulphide, 10-12 fluoroplastic dispersion F-4DV (55%), 0.4 acetic acid (100%) as a neutralising agent, 3.5-4.1 butylene glycol, 4.5-5.1 phenoxypropanol, 0.0018-0.0021 oxyethylated nonylphenol OP-10, demineralised water - the balance up to 1 litre. The epoxy amine adduct is modified by partially blocked toluene diisocyanate. The pigment paste is stabilised with the epoxy amine adduct. The polyphenylene sulphide used is modified with graphite and silicon carbide, which is pre- hydrophilised with the oxyethylated nonylphenol.

EFFECT: invention enables to obtain thin coatings with a uniform thickness, having chemical resistance, wear resistance, high hardness and anticorrosion protection.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a composition with high diffusion power, which is meant for obtaining coatings at the cathode via electrodeposition. The composition contains an epoxy-amine adduct, which is modified by partially blocked toluene diisocyanate, a pigment paste stabilised by said adduct, a neutraliser - acetic acid, butylene glycol, phenoxy propanol and water. The composition additionally contains powdered polyphenylene sulphide with graphite and silicon carbide additives, treated with an nonionic surfactant - OP-10.

EFFECT: combination of components in a defined ratio enables to achieve targets - high hardness and wear resistance.

FIELD: chemistry.

SUBSTANCE: invention relates to an electrodeposited coating composition which can be deposited on an electroconductive substrate by anodic electrodeposition, substrates coated by such a coating composition and a method of coating a substrate. The electrodeposited coating composition is an aqueous dispersion containing at least a partially neutralised copolymer which contains an α-olefin and an unsaturated carboxylic acid, and a curing agent in form of a metal peroxide. After applying the electrodeposited coating composition by immersing the substrate into said composition, the deposited layer is heated in order to cure the coating and form a cross-linked mesh which provides a durable coating which is resistant to spalling and corrosion.

EFFECT: providing a durable coating which is resistant to spalling and corrosion.

21 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a resin paint composition for high internal permeability cationic electrodeposition and can be used as a primer coat. The composition contains a basic resin which contains products of reaction of polysulphide compounds with epoxy compounds and products of reaction of amine compounds and epoxy compounds; a resin curing agent which contains products of reaction of modified polyol compounds; aromatic sulphonic acid; and a substance which provides rheologic properties, containing a urethane functional group.

EFFECT: composition has high stability of aqueous dispersion, coating uniformity, antibacterial properties, plasticity and anticorrosion properties.

8 cl, 11 tbl

FIELD: chemistry.

SUBSTANCE: dispersion contains an anionic resin, a pigment containing a divalent metal cation and a chelating agent capable of reacting with the pigment. The pigment is present in the aqueous resinous dispersion in the absence of contact between the dispersion and the surface to be coated.

EFFECT: invention enables to obtain a stable aqueous anionic dispersion.

24 cl, 1 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: coating composition contains colophony which forms part of the basic cationic resin. The colophony first reacts with dienophile containing carboxyl groups or a binding molecule, and then reacts with epoxy resin.

EFFECT: invention enables to obtain coatings using raw materials from renewable or cheap sources.

14 cl, 1 tbl, 24 ex

FIELD: paint and varnish industry, anti-corrosive agents.

SUBSTANCE: invention relates to corrosion modifying agents used for covering metallic surfaces without their preliminary cleansing from corrosion products. The corrosion modifying agent comprises the following components, wt.-%: hydrolysis lignin, 19-23; oil as by-side product in caprolactam manufacturing, 5-10; thermic ortho-phosphoric acid in the concentration 70%, 17-26, and water, balance. Invention provides preparing a composition transforming rust corrosion with layer thickness up to 160 mcm that provides enhancing adhesion of applied paint and varnish materials after treatment with the proposed modifying agent significantly.

EFFECT: improved and valuable properties of agent.

3 tbl

FIELD: corrosion protection.

SUBSTANCE: invention is designed for oil production and can also be used in mechanical engineering, instrumentation engineering, and other branches. Composition contains 6-10% low-grade lignosulfonates, 2-5% industrial oil (spindle oil, tall oil, or MS-20 oil), 60-65% production waste, and 24-28% additive, namely primary C8-C11-amines. Production waste is, in particular, vat residues from production of synthetic fatty C10-C-acids or solid petroleum hydrocarbons: asphaltene-tar-paraffin deposits formed during production and transportation of petroleum. Use of composition increases degree of protection of metallic objects against corrosion under atmospheric precipitate conditions owing to retained high adhesion of coating formed from composition to metal, reduced porosity of coating, and prolonged period of time before appearance of the first center of corrosion attack at lower thickness of coating.

EFFECT: improved anticorrosion characteristics, simplified composition preparation technology, reduced coating formation time, and reduced expenses due to utilized waste.

2 cl, 2 tbl

The rust converter // 2186080

FIELD: chemistry.

SUBSTANCE: method of complex processing of vegetable biomass includes hydrothermomechanical processing of destructed vegetable biomass in liquid medium and separation of obtained pulp into target products in form of separate fractions. At the first stage pulp, obtained by mixing of water and vegetable wastes, is processed by mechanical impact in device, causing self-heating of pulp components, at the second stage after processing of pulp at temperature of self-heating 40+/-5°C part of liquid fraction is discharged from pulp, at the third stage water is added and hydrothemomechanical processing is repeated, providing self-heating of mixture to 120+/-5°C or hydrothermomechanical processing is carried out at temperature not higher than 200°C by said self-heating and additional heating, in the process of the following mixture cooling separated are solid phase dispersed in pulp cellulose fraction at reduction of pulp temperature to 100±5°C, lignine fraction, deposited at reduction of pulp temperature to 40±5°C, - liquid fraction in form of mixture of water and low molecular organic or inorganic compounds, which are soluble in water and/or precipitate at temperatures lower than 40±5°C, with hydrothermomechanical processing being carried out in water at ratio of water/biomass from 20:80 to 80:20.

EFFECT: method is environmentally friendly, is characterised by high degree of target product extraction, which results in obtaining fractions, suitable for further application.

4 cl, 5 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: treatment is carried out in an aqueous-organic solvent medium.

EFFECT: high solubility of hydrolysed lignin and shorter duration of treatment.

2 cl, 1 tbl, 13 ex

FIELD: chemistry.

SUBSTANCE: lignocellulose biomass is fed at first pressure and first temperature. The biomass includes a first solid fraction which contains insoluble lignin and a first liquid fraction which contains soluble C6 saccharides, and soluble lignin. Before said phased feeding, at least part of the C6 saccharides is removed from the biomass by fractionation. The first biomass pressure is lowered to a second pressure while virtually simultaneously lowering the first biomass temperature to a second temperature. Virtually simultaneous reduction of second pressure and second temperature to third pressure and third temperature is carried out to deposit soluble lignin into the first liquid fraction. A mixture is formed, which contains a second solid fraction which contains insoluble lignin, and deposited lignin, as well as a second liquid fraction which contains soluble C6 saccharides. The invention enables to obtain a lignin product with small particles for improving combustion efficiency and preventing typical problems of equipment clogging and high degree of energy recovery.

EFFECT: reduced clogging of equipment with lignin when processing lignocellulose biomass.

29 cl, 1 dwg, 1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: when implementing the method (version 1), the starting material used is hydrotropic lignin obtained from silver grass, which is mixed with water. Hydrolysis is carried out at atmospheric pressure. The mixture is heated to water boiling point and held for 5-60 minutes. After holding, the solid phase is then collected, dried and treated with acetone at room temperature. The solid phase is then separated. Acetone is then removed from the filtrate at room temperature to obtain a thermoplastic polymer. When implementing the method (version 2), the starting material used is crushed silver grass, which is mixed with water. Hydrolysis is carried out at high pressure. The mixture is heated to temperature of 180-190°C and held for 5-60 minutes. After holding, the reaction mixture is cooled to room temperature. The solid phase is collected, washed with water until the rinse water becomes clear, dried at temperature of 100-110°C and then treated with acetone while boiling for 30-60 minutes. The solid phase is then separated. Acetone is then removed from the filtrate at room temperature. The obtained intermediate product is treated with acetone at room temperature. The solid phase is separated. Acetone is removed from the filtrate at room temperature to obtain a thermoplastic polymer.

EFFECT: each version of the invention improves environmental safety, technological expediency and operational properties of the method of producing an end product which is soluble in an organic solvent and has a low melting point.

3 cl, 2 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to catalytic processes. Described is a method for synthesis of a catalyst for oxidative cracking of organic material, including biomass, involving heating water containing 1-10% lower alcohol to 58-75°C, adding FeCl3×6H2O and soda with weight ratio of iron chloride to soda of 1.5-80, holding the aqueous solution at temperature of 58-75°C for at least 10 minutes while stirring and leaving the aqueous solution until complete precipitation of Fe3+. Described is use of a catalyst obtained using said method for oxidative cracking of organic material.

EFFECT: high catalyst activity.

14 cl, 8 ex

FIELD: chemistry.

SUBSTANCE: invention relates to production of powdered cellulose from cellulose materials. The method involves breaking down cellulose material using a Lewis acid solution and an organic solvent while stirring. The breakdown process takes place at low concentration of the Lewis acid solution using a minimal amount of organic solvent. The product is washed and dried. The cellulose material used is different types of lignocellulose materials obtained from semi-finished wood products which are obtained during processing thereof at paper mills, straw of grain crops and waste paper material.

EFFECT: obtained powdered cellulose has high chemical reactivity and can be used in analytical chemistry, cosmetic and pharmaceutical industry, to modify cellulose and lignocellulose materials and when producing derivatives thereof for special purposes.

2 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: method involves extraction of betulin from birch bark using methyl tert-butyl ether. The bark is the treated with aqueous NaOH solution. The aqueous alkaline solution discharged from the birch bark for extracting suberic acids is treated with sulphuric acid solution. Purification of betulin from impurities in an organic extract is carried out via concentration followed by hot washing with NaOH solution and then with water, while simultaneously distilling residual methyl tert-butyl ether from the betulin. The method enables to obtain betulin and suberic acids without additional purification steps.

EFFECT: environmental safety and cost effectiveness.

2 ex

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