Blocked polyisocyanates, method of their obtaining and application

FIELD: chemistry.

SUBSTANCE: invention relates to blocked polyisocyanates, applied for obtaining binding agents for lacquers, paints and elastomers in form of systems of hot drying for application of coatings on substratum from wood, metals, mineral substances, products from concrete, textile, glass or plastics, as well as hardener for polyol components. Blocked polyisocyanates have general formula (I): Polyisocyanates are obtained by interaction of polyisocyanates of general formula (II) with secondary amines of general formula (III) and hydrophilising means D-H, where D represents residue of cationic, anionic and/or non-ionic hydrophilising means.

EFFECT: obtaining of polyisocyanates, which have lower temperature of hardening or temperature of hot drying, due to which compositions of materials, which contain such polyisocyanate, are more stable in storing at room temperature and more stable at high temperatures of hot drying.

14 cl, 1 tbl, 15 ex

 

The present invention relates to new polyisocyanates, more particularly to a blocked polyisocyanates, method of their production and use.

The use of locking means for the temporary protection of isocyanate groups has long been known. The blocked polyisocyanates are used, among other things, to obtain stable when stored at room temperature, cured at high temperatures of odnoupakovochnye polyurethane systems hot drying. Thus, the blocked polyisocyanates are mixed with containing hydroxyl group complex polyesters, polyacrylates, other polymers, as well as with other components of varnishes and paints, such as pigments, co-solvents or additives. Another form stable when stored at room temperature hot drying varnishes are self-curing odnoupakovochnye the hot drying system, which includes as a binder a polymer that contains in one molecule as blocked polyisocyanates and hydroxyl group.

Surveys on the use of blocked polyisocyanates are, for example, in the works Z.Wicks, Progress in Organic Coatings, 1975, 3, 73-99; Z.Wicks, Progress in Organic Coatings, 1981, 9, 3-28; D.A.Wicks and Z.W.Wicks, Progress in Organic Coatings, 1999, 148-172.

The most important compounds used for blocking polyisocyanates, are ε-caprolactam, matile elcatonin (butanonoxime), diethyl ester of malonic acid, secondary amines, and derivatives of triazole or pyrazole, as described, for example, EP-A 0576952, EP-A 0566953, EP-A 0159117, US-A 4482721, WO 97/12924 or EP-A 0744423.

Secondary amines as a blocking means described in EP-A 0096210. However, there is clearly named as a blocking means amines containing only alkyl, cycloalkyl and kalkilya group. Amines containing functional groups with multiple bonds carbon-heteroatom or heteroatom-heteroatom, there clearly are not mentioned.

The most commonly used blocking agents for isocyanates are ε-caprolactam and butanonoxime. While for ε-caprolactam are used, as a rule, the temperature of the hot drying of about 160°C, blocked odnoupakovochnye lucky hot drying, for which the blocking means used butanonoxime, can be hot drying at temperatures 10-20°C below. However, at these temperatures hot drying some systems for varnishes were no longer obtained the desired properties of varnishes. But these temperatures are also sometimes perceived as too high, so there is a need in the hot drying systems, which are fully otverzhdajutsja at lower temperatures than the temperature when using systems containing blocked by butanonoxime society hardener.

Therefore, the objective of the invention is to provide a blocked polyisocyanate, which is lower than the locked butanonoxime polyisocyanates, the curing temperature or the temperature of the hot drying.

The problem is solved offered blocked polyisocyanates of the formula (I)

where a represents the residue MDI

Represents a group

in which R6means C1-C6-alkyl,

D means the rest of cationic, anionic and/or nonionic hydrophilizing funds

R1-R4the same or different and independently of one another denote hydrogen or C1-C6-alkyl,

R5means C1-C10-alkyl or C3-C10-cycloalkyl,

y represents a number from 1 to 8 and

z signifies a number from 0.1 to 4, preferably from 0.2 to 2,

moreover, the ratio of y:z is from 20:1 to 1:1, preferably 10:3 to 3:1, most preferably from 8:1 to 4:1.

The object of the invention is also a method of obtaining blocked polyisocyanates of the formula (I), which is that the polyisocyanates of the General formula (II)

where A, y and z have the meanings indicated for formula (I),

subjected to the interaction of the secondary amines of General formula (III)

where R1-R5and have the meanings specified for formula (I),

and hydrotribromide means D-H.

Other objects of the invention are the use of blocked polyisocyanates according to the invention to obtain varnishes, paints and other hot drying systems, such as, for example, adhesives or elastomers, as well as the additives used in the vulcanization of rubber, and articles of these materials and substrates with coatings of these materials.

The blocking agent of the formula (III) can be obtained, for example, by reaction of primary amines with compounds with activated double bonds of carbon-carbon bonds, as described, for example, in Organikum, 19th edition, published by Deutscher Verlag der Wissenscaften, Leipzig, 1993, str-525. The primary amine selectively reacts with a double bond of carbon-carbon with the formation of secondary asymmetric amine. Preferably as a blocking means of the formula (III) use of the substance, which can be considered as products of the reaction in the above sense sterically obstructed primary alkylamines followed, such as, for example, sec-butylamine, tert-butylamine, optionally alkyl substituted cyclohexylamine, ISO-Propylamine, cyclopropylamine, branched or cyclic isomers of pentyl-, hexyl-, heptyl-, octyl and nonylamine, benzylamine, and is joining with activated double bonds of carbon-carbon, such as, for example, esters of α,β-unsaturated carboxylic acids, N,N-dialkylamide α,β-unsaturated carboxylic acids, nitroalkane, aldehydes and ketones. Most preferably used compounds that can be considered as the addition products of primary amines to the complex alkilany esters of acrylic, methacrylic and crotonic acids, such as methyl methacrylate, ISO-norbornylene, ethyl methacrylate, n-propylbetaine, ISO-propylbetaine, n-butylmethacrylate, ISO-butylmethacrylate, 2-ethylhexylacrylate, methyl acrylate, acrylate, n-propylacetate, ISO-propylacetate, ISO-norbornylene, n-butyl acrylate, tert-butyl acrylate, ISO-butyl acrylate, 2-ethyl hexyl acrylate, methyl ester of crotonic acid, propyl ester of crotonic acid.

Preferably used such substances, which can be viewed as the addition products of tert-butylamine, Diisopropylamine and/or cyclohexylamine to alkylacrylate or alkyl methacrylates. Especially preferred products that can be obtained by joining tert-butylamine to the methyl methacrylate or tert-butyl ether, acrylic or methacrylic acid.

Receiving the locking means can take place in a suitable, mainly polar solvent. If necessary, you can separate the desired products from the process is of Italia and/or by-products by distillation or extraction and then subjected to interaction with polyisocyanates. But it is also possible to carry out the reaction in a suitable solvent varnishes and the resulting reaction mixture was used directly to obtain the blocked polyisocyanates.

Needless to say, can be used as a blocking means of the formula (III), which is obtained other than that described above by, for example, by transesterification of a complex ethyl ester of the formula (III) in methyl ester.

Needless to say, the blocking means of the formula (III) can be used in any mixtures with one another. You can also use the blocking means according to this invention in any of the mixtures described above with other known blocking agents.

As polyisocyanates in the sense of the invention can be used all known polyisocyanates based on aliphatic, cycloaliphatic and aromatic diisocyanates, with an NCO content of from 0.5 to 50, preferably from 3 to 30, most preferably from 5 to 25 wt.%, for example, the polyisocyanates based on 1,4-diisocyanatobutane, 1,6-diisocyanatohexane (HDI), 2-methyl-1,5-diisocyanatobutane, 1,5-diisocyanato-2,2-dimethylpentane, 2,2,4 - or 2,4,4-trimethyl-1,6-diisocyanatohexane, 1,10-diisocyanatohexane, 1,3 - and 1,4-diisocyanatohexane, 1,3 - and 1,4-bis(isocyanatomethyl)cyclohexane, 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethyl (zofrandiscount, IPDI), 4,4'-diisocyanatohexane, 1-isocyanato-1-methyl-3(4)-isocyanatomethyl (IMCI), bis-(isocyanatomethyl)norbornane, 1,3 - and 1,4-bis(2-isocyanatopropyl-2-yl)benzene (TMXDI), 2,4 - and 2,6-diisocyanates (TDI), difenilmetana-2,4'- and/or -4,4'-diisocyanate (MDI), as well as products gidrirovanie cores, 1,5-diisocyanatobutane, 2,4'- and 4,4'-disorientation.

The most suitable are the polyisocyanates that have heteroatoms in the residue containing isocyanate groups. Examples thereof include polyisocyanates having carbodiimide, allophanate, which, iminoimidazolidine, urethane and biuret groups.

Especially good from the point of view of the invention known polyisocyanates, which are mainly used to obtain varnishes, such as modified products of the above diisocyanates having allophanate and/or biuret and/or which, uretdione group and/or iminoimidazolidine group, in particular, hexamethylenediisocyanate or isophorondiisocyanate, 2,4'- and 4,4'-diisocyanatohexane. Further, suitable low molecular weight polyisocyanates with urethane groups, which can be obtained by the interaction taken in excess of isophorondiisocyanate (IPDI), difenilmetana-2,4'- and/or -4,4'-diisocyanate (MDI) or 2,4 - and 2,6-diisocyanate is wala (TDI) with simple polyhydric alcohols with a molecular weight of from 62 to 300, in particular trimethylolpropane or glycerin.

Particularly preferred polyisocyanates with which, iminoimidazolidine or biuret structure on the basis of hexamethylenediisocyanate (HDI), isophoronediisocyanate (IPDI) and/or 4,4'-diisocyanatohexane or mixtures of these compounds.

In addition, suitable polyisocyanates are known prepolymers having terminal isocyanate groups, which receive, in particular, the interaction of the abovementioned simple polyisocyanates, preferably diisocyanates, with excess quantities of organic compounds containing at least two reactive to isocyanate functional groups. In these known prepolymers, the ratio of isocyanate groups to reactive to NCO-groups to hydrogen atoms is from 1.05:1 to 20:1, preferably from 1.3:1 to 3:1, and the hydrogen atoms are mostly attributed to the hydroxyl groups. The type of and quantitative ratios of the starting materials used to obtain prepolymers with NCO groups, preferably selected in such a way that the resulting prepolymers with NCO-groups have an average NCO functionality of 2 to 3 and srednekamennogo value of molecular weight from 500 to 10,000, preferably from 800 to 4000. Unreacted polyisocyanate after receipt the of prepolymer can be removed preferably by distillation.

Needless to say, these polyisocyanates may be used in the form of mixtures with one another.

Further, as polyisocyanates in the sense of the present invention is also suitable polymers with free isocyanate groups on the polyurethane-based, complex, polyester and/or polyacrylate, and optionally mixtures thereof, in which only a part of free isocyanate groups interacts with the locking means according to the invention, while the remainder reacts with excess containing hydroxyl group of polyesters, polyurethanes and/or polyacrylates, and optionally mixtures thereof, resulting in a polymer having free hydroxyl groups, which when heated to a suitable temperature of the hot drying cures without the addition of other substances from reactive to isocyanate groups (self-curing tropicabana system hot drying).

Getting blocked polyisocyanates according to the invention can take place by known methods. For example, to one or more polyisocyanates with stirring is added blocking agent (for example, for 10 min). The mixture is stirred until until no longer detectable free isocyanate. You can also one or more polyisocyanates block with a mixture of the C of two or more of the blocking means.

Needless to say, obtaining can be carried out if necessary in mixing with the water solvent, which if necessary can again be deleted upon receipt. But you can also get the polyisocyanates according to the invention is not miscible with water solvent and this mixture is then atomized in water or dilute miscible with water solvents, such as acetone or N-organic, prior to the formation of solutions miscible with water. Upon receipt of the polyisocyanates according to the invention can be used as catalysts, co-solvents and other auxiliary substances and additives.

Next, the free NCO groups of the diisocyanates can only partially interact with the locking means according to the invention and then the part of the non-blocked NCO-groups to react with the formation of polyisocyanates comprising at least two diisocyanates.

A significant part of getting blocked polyisocyanates according to the invention is their gidrogenizirovanii, which leads to the fact that the resulting polyisocyanates after adding water remain in solution or form a thin, resistant to sedimentation dispersion.

As a means of increasing the hydrophilicity can be used all suitable for this purpose and cationic, anionic and/or nonionic compounds, such as mono - and/or dihydroxycinnamate acid or monofunctional alkylalkoxysilane. You can also use mixtures of different hydrophilicity funds.

Embedding hydrophilizing funds in the polyisocyanates according to the invention may be known by themselves ways. For example, the first part of the isocyanate groups interacts with the locking means according to this invention and then the remaining part interacts with gidrofiliziruyuschim means. However, you can do and Vice versa, or in such a way that the blocking of the isocyanate groups will occur in two stages, namely before and after hydrophilization.

Needless to say, Hydrophilidae funds can be added at any time upon receipt of the polyisocyanates according to the invention, as, for example, upon receipt of the prepolymers. In addition, as hydrophilicity funds can be used hydrophilisation simple and complex polyesters and/or polyacrylates, as, for example, is used to obtain self-curing of odnoupakovochnye hot drying varnishes. Can also be used a mixture of hydrophilizing and dehydrofreezing polyisocyanates.

If hydrophilization used mono - or dicarboxylic acid that is then complete or partial neutralization of the carboxyl groups. Neutralization can be carried out using any amines, such as triethylamine, dimethylcyclohexylamine, methyldi-ISO-Propylamine or dimethylethanolamine. Also suitable ammonia.

The blocked polyisocyanates according to the invention are used as hardeners in the form hydrophilizing water and/or with water-dilutable blocked polyisocyanates in the composition, respectively, consisting of

(a) 100 equivalent% MDI (II);

b) 40-90, preferably 60-85 equivalent-% of the blocking means (III) according to this invention;

C) 10-40, preferably 10 to 30, most preferably 10 to 25 equivalent% hydrophilizing means D and, if necessary

d) 0-40, preferably 5 to 25 equivalent% difunctional connection, preferably hydroxyl and/or amino groups, with an average molecular weight of from 62 to 3000, preferably 62-1500,

moreover, the quantitative proportions of the reactants are selected so that the equivalent ratio of NCO groups of component a) to the reactive towards isocyanate groups of component b), C) and d) is from 1:0.8 to 1:1,2,

as well as additives and auxiliary substances.

As difunctional component extension chain) can be taken into account, for example, diamines, diols, and hydroxyamine with molecular in the catfish from 32 to 300. Examples of these include hydrazine, Ethylenediamine, ISOPHORONEDIAMINE, basketman of isophorondiamine and isobutyl ketone, 1,4-dihydroxybutyl, 1,6-hexanediol, ethanolamine, N-methylethanolamine, hydroxyethylammonium, the product of the joining of 2 moles of propylene carbonate to 1 pray hydrazine of formula (III).

Water and/or with water-dilutable blocked polyisocyanates are either in the form of solutions mainly in mixing with the water solvent, such as N-organic, with a concentration of 40-95, preferably 60-85 wt.%, either in the form of fine dispersions with solids content 25-70, preferably 35-50 wt.%.

The blocked polyisocyanates according to the invention is used to obtain a binder for lacquers, paints and other hot drying systems, such as adhesives and elastomers, and as a hardener (component) for polyol as one of the components. They can be used to produce coatings on substrates of any material, such as, for example, metals, wood, minerals, concrete products, plastics, textiles, glass.

The polyisocyanates according to the invention are, as described above, self-curing polymers and/or can also be used as hardeners polyol as one component. As a polyol as one of the components that can be used t is the train in the form of a mixture, dealt with complex polyhydroxyvalerate, simple polyhydroxyvalerate or polymers with hydroxyl groups, for example the well-known polyhydroxyvalerate with a hydroxyl number of from 20 to 200, preferably from 50 to 130, based on 100%green products, or polyhydroxyalkanoate or polygalacturonate.

In the case of polyhydroxyvalerate we are talking about well-known mixed polymers of styrene and esters of acrylic or methacrylic acid, with the aim of introducing hydroxyl groups are applied simultaneously hydroxyalkyl esters, such as, for example, 2-hydroxyethyloxy, 2-hydroxypropanoic, 2-, 3 - or 4-hydroxybutyrate esters of these acids.

Suitable simple polyether polyols are known from polyurethane chemistry products amoxilonline or propoxycarbonyl suitable two-, three - or chetyrehtomnik parent compounds, such as, for example, water, ethylene glycol, propandiol, trimethylolpropane, glycerol and/or pentaerythritol.

Examples of suitable complex polyether polyols, in particular, are known from polyurethane chemistry interaction products, polyhydric alcohols, for example of alcantarillas named type with excessive amounts of polycarboxylic acids or anhydrides of polycarboxylic acids, especially dicarboxylic acids or anhydrides dicar nowych acids. Suitable polycarboxylic acids or anhydrides of polycarboxylic acids are, for example, adipic, phthalic, isophthalic acid, phthalic anhydrides, tetrahydrophthalic and hexahydrophthalic acid, maleic acid, anhydride of maleic acid, addition products of Diels-alder reaction with cyclopentadiene, fumaric acid or dimeric and trimeric fatty acid series. Upon receipt complex polyether polyols can also be used in any mixture mentioned as examples of polyhydric alcohols or any mixture mentioned as examples of the acids and anhydrides of acids.

Obtaining complex polyether polyols is well-known methods, such as, for example, described in Houben-Weyl, Methods der organischen Chemie, .XIV/2, Izd-vo G.Thime, 1963, p.1-47. Required if necessary hydrophilic modification of these polyhydroxylated compounds is well-known methods, as, for example, described in EP-A 0157291 or EP-A 0437028.

Needless to say, may also be used mixtures or reaction products based on polyesters, polyethers and polyacrylates if necessary, modified polyurethanes known type.

Getting varnishes, inks and other compositions with the use of the polyisocyanates according to the invention by a known method is mi. In addition to the polyisocyanates and polyols in the composition may be added conventional additives and auxiliary substances (e.g. solvents, pigments, fillers, to contribute to filling antispyware, catalysts) in amounts readily determined by experts.

You can also use other compounds with reactive groups in relation to the NCO-groups as additional components of hardeners. Examples of such compounds are the aminos. As aminos should be considered well-known in the technology of varnishes condensation products of melamine and formaldehyde or urea and formaldehyde. Suitable for all usual separatelysexamine or interesterified saturated monosperma with the number of carbon atoms from 1 to 4 melamine-formaldehyde condensates. In the case of joint application of other components of hardeners amount of the binder with the active towards isocyanate groups with hydroxyl groups accordingly agreed.

The blocked polyisocyanates according to the invention can be used to generate hot drying varnishes, for example, for industrial coating and for the primary coating of automobiles. For this composition for coating according to this invention can be applied by squeegee, OK what knowledge, spray, such as pneumatic or airless spray, and electrostatic spray, for example, cone coating at high speed (Hochrotationsglockenauftrag). The dry film thickness may be, for example, from 10 to 120 n. Curing the dried film occurs by hot drying at a temperature of from 90 to 160°C., preferably from 110 to 140°C., most preferably from 120 to 130°C. the Blocked polyisocyanates according to the invention can be applied to obtain varnishes hot drying for continuous coating on the metal strip, and the maximum temperature of the hot drying, well-known experts in obtaining coatings on metals) as the maximum (for metal) temperature [Peak (Metal) Temperature], can reach values from 130 to 300°C., preferably from 190 to 260°C, and the thickness of the dry film, for example, to achieve 3-40 μm.

The following examples explain the invention without limiting it.

Examples

In the case of interest data it comes to weight percent, unless otherwise indicated. If the content of solid substance and content BNCO it comes to the calculated data, which are calculated as follows:

The solids content in %=[(total weight minus total weight of the solvents), divided by the total weight], multiplied by 100;

With the actual content of the BNCO in %=[(the equivalent of blocked NCO groups, multiplied by 42)divided by the total weight], multiplied by 100.

The particle size was determined by laser correlation spectroscopy (LCS).

Example 1. Blocking means B1

To 73,14 g of tert-butylamine dissolved in 160,0 g of methanol was added with stirring at room temperature 86,09 g of methyl acrylate and the resulting clear solution was stirred for another 16 hours at room temperature. Drove the solvent and received 158,1 g of the product of the formula

with a purity sufficient for further transformation into a blocked polyisocyanate.

Example 2. Blocking means B2

To 95,09 g of tert-butylamine dissolved in 175,0 g of ethanol was added under stirring at room temperature 100,1 g of methyl methacrylate and the resulting clear solution was stirred for another 72 hours at 70°C. Drove volatile components were filtered and the filtrate was received 165,7 g of the product of the formula

with a purity sufficient for further transformation into a blocked polyisocyanate.

Example 3. Blocking means EOI

To 73,14 g of tert-butylamine dissolved in 200,0 g of methanol was added with stirring at room temperature 128,1 g tert-butyl acrylate and the resulting clear solution was stirred for another 16 hours at room temperature. Drove RA the sun God and received 199,1 g of the product of the formula

with a purity sufficient for further transformation into a blocked polyisocyanate.

Example 4. Blocking means B4

To 99,18 g cyclohexylamine dissolved in to 185.0 g of methanol was added with stirring at room temperature 86,09 g of methyl acrylate and the resulting clear solution was stirred for another 16 hours at room temperature. Drove the solvent and received 184,2 g of the product of the formula

with a purity sufficient for further transformation into a blocked polyisocyanate.

Example 5. Blocking means B5

To 59.0 g of Isopropylamine dissolved in 135,0 g of methanol was added with stirring at room temperature 100,1 g of methyl methacrylate and the resulting clear solution was stirred for another 12 hours at room temperature. Drove the solvent and received 158,2 g of the product of the formula

with a purity sufficient for further transformation into a blocked polyisocyanate.

Example 6. Blocking means B6

To 73,14 g of tert-butylamine dissolved in 175,0 g of ethanol was added under stirring at room temperature 100,1 g of methyl ester of crotonic acid and the resulting clear solution was stirred for another 72 hours at 70°C. Drove solvent and received 168,9 g of the product of the formula

with a purity sufficient for further transformation into a blocked polyisocyanate.

Example 7

(Obtain with water-dilutable polyisocyanate hardener)

Mixed under stirring 58,80 g (0,297 EQ.) contains which group lacquer MDI trading quality based on 1,6-diisocyanatohexane (HDI) with an NCO content of 21.4 in wt.%, viscosity at 23°C of about 3000 MPa·s and a functionality of about 3.5, was 7.08 g (0,06 mol) hydroxypivalic acid and 56,57 g of N-methylpyrrolidone and within 30 minutes was heated to 70°C. was Stirred at this temperature for 2 hours and then raised the temperature to 80°C. After another 2 hours the NCO content was reached 7,60%, the reaction mixture was cooled to 55°C. and then for 15 min was added 35,35 g (0,222 mol) of the compound from example 1, and the temperature was raised to 55°C.

Was stirred at 55°C for 10 minutes and the completeness of the reaction was confirmed with the use of IR spectra. Then added at 50°C 5.35 g (0,06 mole) of dimethylethanolamine and stirred for another 10 minutes. Received a clear solution blocked MDI with a solids content of 66.6% and a content of blocked NCO-groups 5,69%.

Example 8

(Obtaining a water dispersion according to this invention)

To 58,80 g (0,297 EQ.) contains which group lacquer MDI trading quality based on 1,6-diisocyanatohexane (HDI) with what uranium NCO to 21.4 wt.%, viscosity at 23°C of about 3000 MPa·s and a functionality of about 3.5 under stirring and at room temperature was added for 20 minutes 30,10 g (0,1879 mol) of the compound from example 1. The temperature increased to 50°C., the NCO content in the reaction mixture reached 5,06%]. 5,07%). The reaction mixture with stirring, they were heated to 70°C. and then added sequentially within 30 minutes of 1.61 g (0,0135 mole) of 1,6-hexandiol and 6.42 per g (0,054 mole) hydroxypivalic acid, the latter is dissolved in 10,36 g of N-methylpyrrolidone. Was stirred for another 2 hours at 70°C., the NCO content was reached to 0.2%. Then at 70°C was added 5.34 g (0,0594 mole) of dimethylethanolamine and stirred for another 15 minutes. Then added 143,84 g of warm (70°C) deionized water and was dispersively at 70°C for 1 hour. Formed a stable white dispersion with the following properties:

the solids content40%
pH8,98
viscosity (at 23°C)10 MPa·s
the average particle size (LKS)138 nm

Example 9

(Obtaining a water dispersion of the hardener according to the invention)

343,20 g (1,76 EQ.) sod is rasego which group lacquer MDI trading quality based on 1,6-diisocyanatohexane (HDI) with an NCO content of 21.4 in wt.%, viscosity at 23°C of about 3000 MPa·s and a functionality of about 3.5 was heated with stirring to 70°C. and added over 10 minutes of 9.45 g (0,08 mol) of 1,6-hexandiol. After this solution was added 37,76 g (0.32 equiv.) hydroxypivalic acid in 60,93 g of N-methylpyrrolidone for 3 hours and then stirred for 1 hour at 70°C. After that, the NCO content in the reaction mixture reached to 11.56%]. 11,91%). Then at 70°C was added 198,73 g (1.25 mol) of the blocking means from example 1 for 30 minutes and stirred for another 30 minutes. After that, the presence of NCO groups was no longer detected IR by a spectroscope. 10 minutes was added at 70°C 31,38 g (0,352 mole) of dimethylethanolamine, stirred for another 10 minutes and then under stirring was added 869,9 g of hot (70°C) deionized water and 1 hour and stirred at 70°C. After cooling with stirring to room temperature, the dispersion had the following properties:

the solids content40%
pH8,04
viscosity (at 23°C)30 MPa·s
the average particle size (LKS)69 nm

Example 10

(Obtaining a dispersion according to this izobreteny is)

Acted as described in example 9, but as MDI used a 70%solution of the trimer of isophorondiisocyanate in a mixture of methoxypropylacetate/xylene (Desmodur® Z 4400 M/S, Bayer AG). The resulting dispersion had the following properties:

the solids content40%
pH9,12
viscosity (at 23°C)60 MPa·s
the average particle size (LKS)105 nm

Example 11

To 78,00 g (0.4 EQ.) contains which group lacquer MDI trading quality based on 1,6-diisocyanatohexane (HDI) with an NCO content of 21.4 in wt.%, viscosity at 23°C of about 3000 MPa·s and a functionality of about 3.5 with stirring and at 70°C for 5 minutes was added a solution of 4.72 in (0,04 mol) hydroxypivalic acid and 1.34 g (0,01 mol) dimethylolpropionic acid in 11,17 g of N-methylpyrrolidone. After the addition of 4.00 g (0,008 mol) of Pluriol 500 (metallicaidisapear, molecular weight 500) and 1.18 g (0,02 mol) of 1,6-hexandiol was stirred for 90 minutes at 70°C. After that, the NCO content was 12,98%]. 13.05 percent). At 70°C was added 49,68 g (0,312 mol) of the compound from example 1 for 20 minutes and lane is massively at 70°C for another 15 minutes. Then the presence of NCO groups was no longer detected IR by a spectroscope. At 70°C was added to 4.46 g (0.05 mole) of dimethylethanolamine, 10 minutes, stirred and then added 205,79 g of warm (50°C) water. Was stirred at 50°C. for another 1 hour. The resulting dispersion had the following properties:

the solids content40%
pHof 9.30
viscosity (at 23°C)1800 MPa·s
the average particle size (LKS)73 nm

Example 11a

Acted as described in example 9, but instead of the compound of example 1 used the same molar quantity of the compound from example 5. The resulting dispersion had the following properties:

the solids content40%
pH8,60
viscosity (at 23°C)170 MPa·s
the average particle size (LKS)148 nm

Example 12

(Comparative example 1)

Acted is so, as described in example 9, but instead of the compound of example 1 used butanonoxime. The resulting dispersion had the following properties:

the solids content38%
pH8,5
viscosity (at 23°C)4000 MPa·s
the average particle size (LKS)42 nm

Example 13

(Getting self-curing one-component system hot drying)

To a mixture of 337,5 g (3,055 EQ.) isophorondiisocyanate, 18,02 g (0.2 mole) of 1,4-butanediol, 13,42 g (0,01 mol) of trimethylolpropane, of 22.5 g (0,045 mol) of metasomatically with an average molecular weight of 500 and 205,80 g (0,49 EQ.) complex polyester of adipic acid and hexanediol with an average molecular weight of 840 was added at 85°C under stirring 53,66 g (0.4 mole) dimethylolpropionic acid dissolved in 106,80 g of N-methylpyrrolidone and the reaction mixture was stirred 4 hours at this temperature. After that, the NCO content was 4.78%]. 4,80%). 20 minutes added 97,14 g (0,61 EQ.) connection example 1. Then added 318,18 g (1 EQ.) complex polyester from adipic acid, isophthalic acid, trimethylolpropane, neopentyl is likely and propylene glycol and the reaction mixture was stirred at 85°C for 10 hours. Then the presence of NCO groups was no longer detected IR by a spectroscope. Then added 35,57 g (0.4 mole) of dimethylethanolamine and stirred for another 10 minutes. After adding 1525,5 g of warm (70°C) deionized water were dispersively 1 hour at 70°C. the Obtained white dispersion had the following properties:

the solids content45%
pH8,35
viscosity (at 23°C)580 MPa·s
the average particle size (LKS)40 nm

Example 14

Acted as described in example 13, but instead of blocking the means example 1 used the same molar quantity of the compound from example 5. The resulting dispersion had the following properties:

the solids content45%
pH8,12
viscosity (at 23°C)1800 MPa·s
the average particle size (LKS)63 nm

15

(Comparative example)

Acted as described in example 13, but instead of locking means according to this invention used butanonoxime. The resulting dispersion had the following properties:

the solids content40%
pH8,60
viscosity (at 23°C)3800 MPa·s
the average particle size (LKS)51 nm

Examples of use

The following examples show the benefits of the blocked polyisocyanates according to the invention compared with the known.

Preparing a transparent varnish of the following composition. Of transparent varnishes prepared film was dried for 10 min at room temperature and then 30 minutes was subjected to a hot drying at 140°C. the Obtained film was evaluated from the technological point of view. The results are summarized in table.

11,0
(NCO:HE=1,0)
The polyisocyanate from example No.911a 12131415
The product (g)
Bayhydrol® PT 2411}20,120,120,1---
Bayhydrol® VP LS229054,954,954,9---
Additol® XW 395 Lff1,31,31,31,31,31,3
Surbynol® 104, 50%in NMP (N-methylpyrrolidone)1,31,31,31,31,31,3
Distilled water10,011,013,514,013,5
The polyisocyanate101,8102,582,3164,5164,5164,5
Property
Hardness by pendulum device (s)1631221031189882
The ability to dissolve (1 min)223423443344344434444455
1) Bayer AG, Leverkusen
1. The blocked polyisocyanates of the formula (I)

where a represents the residue of MDI,
Represents a group
,
in which R6means1-C6-alkyl,
D means the rest of cationic, anionic and/or nonionic hydrophilizing tools,
R1-R4the same or different and independently of one another denote hydrogen or C1-C6-alkyl,
R5means1-C10-alkyl or C3-C10-cycloalkyl,
y represents a number from 1 to 8, and
z signifies a number from 0.1 to 4, preferably from 0.2 to 2,
moreover, the ratio of y:z is from 20:1 to 1:1, preferably 10:3 to 3:1, most preferably from 8:1 to 4:1.

2. The blocked polyisocyanates according to claim 1, wherein R5means amyl, isopropyl, isobutyl or tert.-butyl.

3. The blocked polyisocyanates according to claim 1, wherein R1means a methyl residue, a R2, R3, R4mean hydrogen.

4. The blocked polyisocyanates according to claim 1, wherein R3means a methyl residue, a R1, R2, R4mean hydrogen.

5. The blocked polyisocyanates according to claim 1, wherein R1, R2, R3and R4mean hydrogen.

6. Blokiran the s polyisocyanates according to claim 1, characterized in that in one molecule are blocked polyisocyanate groups and free hydroxyl groups.

7. Material compositions for coatings containing blocked polyisocyanates according to claim 1.

8. The compositions of the coating materials according to claim 7, which additionally contain blocked by diisopropylamino, butanonoxime and/or dimethylpyrazolo the polyisocyanates.

9. The compositions according to claim 8, characterized in that pose an aqueous dispersion.

10. The method of obtaining the blocked polyisocyanates of the formula (I) according to claim 1, characterized in that the polyisocyanates of the General formula (II)
,
where A, y and z are specified in the formula (I) in claim 1 values
subjected to interaction with secondary amines of General formula (III)
,
where R1-R5and you have indicated in the formula (I) in claim 1 values
and hydrotribromide means D-H, and D is specified in the formula (I) in claim 1 value.

11. Hydrophilisation, water and/or with water-dilutable compositions containing blocked polyisocyanates according to claim 1, obtained by interaction
(a) 100 equivalent-% MDI (II);
b) 40-90 equivalent-% of the blocking means (III);
C) 10-40 equivalent-% hydrophilizing funds D-H and, if necessary;
d) 0-40 equivalent -%, preferably nefunkcionalnih the connection, containing hydroxyl and/or amino groups, with an average molecular weight of from 62 to 3000, preferably from 62-1500,
moreover, the quantitative relationships of the reactants are so chosen that the equivalent ratio of NCO groups of component a) to the reactive towards NCO-groups groups of components b), C) and d) is from 1:0.8 to 1:1,2,
and optionally additives and auxiliary substances.

12. The use of blocked polyisocyanates according to claim 1 to obtain varnishes, paints, adhesives and elastomers.

13. The application of item 12, wherein the receive varnishes, paints, adhesives or elastomers in the form of hot drying systems for coating on substrates of wood, metal, minerals, products, concrete, textiles, glass or plastics.

14. Method of applying coatings to substrates, characterized in that the formulations for coatings containing blocked polyisocyanates according to claim 1, applied to the substrate, and then the coating is subjected to a hot drying at a temperature of from 90 to 160°C or peak a temperature of from 130 to 300°C.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to blocked polyisocyanates, applied for obtaining of bonding means for thermohardening lacquers, paints and such other subjected to thermo processing systems, as adhesive substances or elastomers, they serve as means for net-like structure formation for polyol components. Blocked polyisocyanates have general formula (I): Said polyisocyanates are obtained by interaction of polyisocyanates of general formula (II)

with secondary amines of general formula (III)

EFFECT: obtaining of polyisocyanates, which ensure lower temperature of net-like structure formation and, therefore thermoprocessing, they are also stable as to crystallisation in organic solutions, which favours appreciable reduction of viscosity of such solutions, because it allows to reduce solvent content.

14 cl, 2 tbl, 15 ex

FIELD: chemistry.

SUBSTANCE: anticorrosive composition for primer coat contains finely dispersed powder of zinc, polystyrene and/or styrene copolymer with rubber used as a binding agent, aromatic solver and 4,4'-diphenylmethanediisocyanate additionally. The method of anticorrosive treatment is carried out by applying over preliminary treated surface at least one primer coat prepared from the mentioned above composition with further applying at least one finishing coat.

EFFECT: preparation of one-package anticorrosive composition, flowability and plasticity of which is unchanged in water presence, providing high anticorrosive and chemical stability of treated surface designed for using articles in the conditions of continuous contact with water medium and atmosphere, having of higher mechanical and adhesive properties and providing with decreased material consumption during coat formation.

3 cl, 5 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to water one-component systems for covering, which are used in glue compositions, in sealants, lacquers and size. Said systems contain (I) at least one polyurethane (A), which contains chemically bound hydrophilic groups, and, in which groups containing active by Tzerevitinov hydrogen atoms are present in amount from 0 to 0.53 mmole/g in terms of relative content of non-voletile dispersion components, (II) at least one blocked polyisocyanate (B), which does not contain hydrophilic groups, and (III) water, weight component ratio between components A and B being chosen in such way that content of blocked isocyanate constitutes from 0.01 to 1.0 mole per 100 g of hard resin. Also described are method of obtaining said systems, their application in sizes for glass fibre, method of obtaining from them covering on carriers, as well as carriers with applied on them preparations for covering, containing systems for covering of composition described above.

EFFECT: obtaining system which ensures stability in storage, reduced water-absorption, higher water-resistance and improved adhesive strength in wet state.

11 cl, 1 tbl, 10 ex

FIELD: chemistry.

SUBSTANCE: group of inventions refers to making paint compositions, such as enamels, namely, to making various-palette alkyd-urethane enamels to be used for protective decorative coating of various surfaces. Paint alkyd-urethane enamel compositions contain a combination of, at least, one alkyd varnish, and, at least, one alkyd-urethane varnish, dye-forming pigment additive component necessary to form enamel colour, at least, one organic solvent, dispersant, siccative and other auxiliary base additives, including, at least, one rheological additive, antiskinning additive, antidimpling additive. Herewith alkyd-urethane varnish content in the composition is at least 10% of total weight of the specified varnishes and/or at least 8% of paint composition weight.

EFFECT: high stress-strain properties and processing behaviour of produced enamels.

13 cl, 2 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention relates to paint-and-varnish industry, in particular to method for production of alkyd-urethane enamels of various colours, and may be used to produce protective-decorating enamel coatings applied onto various substrates. Method for production of alkyd-urethane enamel is described. This method implies preparation of individual precursor components, their dosing, preparation of intermediate enamel product by combining alkyd pentaphthalic lacquer with dispersing medium, organic solvent and rheological agent, the mixture being stirred at 300-500 rpm, followed by introduction of free-flowing pigments into the mixture, together with filler, when required. Pigments and filler are pre-dispersed under stirring at a speed up to 1000 rpm until homogenous suspension is obtained. Then intermediate product is further dispersed until required degree of grinding is obtained, alkyd-urethane lacquer is added under stirring and, when required, anti-crater additive and paint dryer are added. Then, pigment tinting paste is added, the mixture is stirred to obtain homogenous suspension, and antiskinning agent is added.

EFFECT: production of alkyd-urethane enamels of various colours, with high physical and chemical properties.

10 cl, 5 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a composition that can be used for protection of metal surfaces of whatever machinery in contact with corrosion provoking media against corrosion. The composition includes the following components with their ratio in wt %, i.e. 100 of polymer binding epoxy dianic pitch, 20 to 30 of epoxyurethane oligomer modifier, 42 to 48 of organo-silicon amine hardener - γ-aminopropyletoxysilane, 25 to 30 of mineral filler, i.e. titanium dioxide (rutile), 22 to 25 of chromium phosphate inhibiting pigment, 20 to 60 of organic solvents, 3 to 4 of aerosol thixotropic agent, 10 to 20 of anti-rust additive of metal zinc. Xylene or acetone, either butyl acetate, or ethylcellosolve are used as organic solvents.

EFFECT: production of benzene-and water-proof coat with high adhesion properties.

2 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: hydropyle blocked polyisocyanates are produced by the method wherein: A) one or the several organic polyisocyanates interact with B) one or several organic compounds, containing, at least, one isocyanate reactive group and comprising b1) non-ionic hydropyle groups based on simple poly-alkylenoxide-polyethers containing at least 30 wt % of ethylene-oxide links, and/or b2) ionic or potentially ionic hydropyle groups a forming dissociation equilibrium depending upon pH in interaction with water, and, depending upon pH not having a charge and being charged positively or negatively, or interact with C) one or several blocking means containing, at least, one cyclic ketone with CH-acidity of the general formula (2) where X is the electron-acceptor group, R1, R2 mean independently from each other the hydrogen atom, saturated or unsaturated aliphatic residual containing up to 12 carbon atoms, n is 1, and, if necessary, interacting with one or several (cyclic)aliphatic mono- or polyamines with the amount of amino groups in a molecule of 1 to 4 and molecular weight of up to 400 note that, if necessary, it interacts with one or several multinuclear spirits with the number of hydroxyl groups in a molecule from 1 to 4 and molecular weight of up to 400, and, if necessary, with amino spirits in the presence D) of one or several catalysts or, if necessary, with auxiliary substances and additives and, if necessary E), with solvents. Polyisocyanates can be used for manufacturing varnishes, coatings, sizes, glues and molded products.

EFFECT: improved method of producing hydropyle blocked polyisocyanates.

6 cl, 6 ex

FIELD: metallurgy.

SUBSTANCE: invention concerns field of tubes or fittings protection against corrosion or against formation of undesirable deposition, and also concerns field of metallic material multiple coating. It is implemented consecutive plating on metallic surface layers with different coefficients of thermal dilatation from suspension of polymer compound, containing polyurethane compound with admixture, influencing on coefficient of thermal dilatation and soaking of each layer till composition polymerisation. In the capacity of admixture influencing on coefficient of thermal dilatation of polymeric composition, it is used catalytic admixture and applied each of following layers from suspension of polymeric composition, containing greater quantity of catalytic admixture, than previous layer. Suspension contains catalytic admixture in amount 0.01-3 wt % per 1 kg of suspension.

EFFECT: providing of creation of durable and lasting anticorrosive coating, not subjected to destruction in conditions of temperature cycling, impingement attack and abrasive action.

5 cl, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention concerns quickly solidifying polyurethane-based polymer compositions with enhanced adhesion to metal surfaces and can be applied in production of protective coatings, sealing glues, mastics, particularly for sealing of perforated holes in paper-making machines. Composition includes polyfurite urethane forpolymer, liquid solidifier based on 3,3'-dichlor-4,4'-diaminodiphenylmethane and polyoxytetramethyleneglycol with molecular weight of 1000 at mol ratio of 0.95:0.1, aerosil, and additionally contains glycidylmetacrylate as adhesion additive, and can include di-(2-ethylhexyl)phthalate as plastifyer.

EFFECT: obtaining composition with high adhesion to metal surfaces and improved thixotropy without impairing high physical and mechanical characteristics level.

2 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention pertains to polyurethane resin, which is a product of a reaction between at least one diisocyanate and components, containing functional groups, which have capacity to react with isocyanates, with the following composition: (a) first group, which is formed by one or more polyester-polyols based on ethers, each of which has average molecular mass ranging from 400 to 12000 g/mol, (b) second group, formed by one or more poly hydroxilated resins, chosen from a defined group of resins, (c) optional third group, formed by one or more polyols, each of which has average molecular mass, equal to or less than 800 g/mol, which are also chosen from a defined group of polyols, and (d) at least one amine and a reaction chain-stopping agent. The ratio of equivalent masses of diisocyanate and components, containing functional groups, with capacity to react with isocyanates, is chosen such that, naturally all isocyanate groups of diisocyanate are present as a product of the reaction with one of the above mentioned functional groups, with capacity to react with isocyanates. The invention also relates to the method of obtaining the above mentioned polyurethane resin, to polyurethane resin obtained through such methods, to coating for plastic substrates, containing the proposed resin, as a polyolefin binding substance, to use of such a polyurethane resin as a film forming substance in printing ink for printing on plastic substrates, as well as to the method of obtaining a laminate, which has a layer obtained when printing an image, including stages (a)-(d), with use of coating from polyurethane resin, and to a laminate, obtained using such a method.

EFFECT: obtaining a coating from polyurethane resin, with good heat resistance and excellent initial adhesiveness.

20 cl

FIELD: chemistry.

SUBSTANCE: invention relates to blocked polyisocyanates, applied for obtaining of bonding means for thermohardening lacquers, paints and such other subjected to thermo processing systems, as adhesive substances or elastomers, they serve as means for net-like structure formation for polyol components. Blocked polyisocyanates have general formula (I): Said polyisocyanates are obtained by interaction of polyisocyanates of general formula (II)

with secondary amines of general formula (III)

EFFECT: obtaining of polyisocyanates, which ensure lower temperature of net-like structure formation and, therefore thermoprocessing, they are also stable as to crystallisation in organic solutions, which favours appreciable reduction of viscosity of such solutions, because it allows to reduce solvent content.

14 cl, 2 tbl, 15 ex

FIELD: chemistry.

SUBSTANCE: hydropyle blocked polyisocyanates are produced by the method wherein: A) one or the several organic polyisocyanates interact with B) one or several organic compounds, containing, at least, one isocyanate reactive group and comprising b1) non-ionic hydropyle groups based on simple poly-alkylenoxide-polyethers containing at least 30 wt % of ethylene-oxide links, and/or b2) ionic or potentially ionic hydropyle groups a forming dissociation equilibrium depending upon pH in interaction with water, and, depending upon pH not having a charge and being charged positively or negatively, or interact with C) one or several blocking means containing, at least, one cyclic ketone with CH-acidity of the general formula (2) where X is the electron-acceptor group, R1, R2 mean independently from each other the hydrogen atom, saturated or unsaturated aliphatic residual containing up to 12 carbon atoms, n is 1, and, if necessary, interacting with one or several (cyclic)aliphatic mono- or polyamines with the amount of amino groups in a molecule of 1 to 4 and molecular weight of up to 400 note that, if necessary, it interacts with one or several multinuclear spirits with the number of hydroxyl groups in a molecule from 1 to 4 and molecular weight of up to 400, and, if necessary, with amino spirits in the presence D) of one or several catalysts or, if necessary, with auxiliary substances and additives and, if necessary E), with solvents. Polyisocyanates can be used for manufacturing varnishes, coatings, sizes, glues and molded products.

EFFECT: improved method of producing hydropyle blocked polyisocyanates.

6 cl, 6 ex

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention relates to mixtures consisting of blocked polyisocyanates designated as hardening agents in monocomponent lacquers of hot drying and comprising: (a) blocked polyisocyanate based on 1,6-diisocyanate hexane; (b) blocked polyisocyanate based on cycloaliphatic diisocyanates chosen from group comprising 1-isocyanato-3,3,5-trimethyl-5-ixocyanatomethylcyclohexane, bis-(4-isocyanatocyclohexyl)methane, 2,6-bis-isocyanatonorbornane, 2,5-bis-isocyanatonorbornane, 1,4-bis-isocyanatomethylcyclohexane and their mixtures, and (c) 3,5-dimethylpyrazole as a single blocking agent of agent of polyisocyanates named in (a) and (b). Blocked polyisocyanates are taken in the weight ratio (a) : (b) = 1:(1.8-2.2). Using mixtures of blocked polyisocyanates provides preparing clear lacquers with good acid resistance, stability against scratching and thermal yellowing.

EFFECT: improved and valuable properties of agents.

1 cl, 6 ex

FIELD: self-crossing dispersion for dressing of glass-fiber.

SUBSTANCE: the invention is pertaining to the field of the self-crossing dispersion for dressing of glass-fiber on the basis of polyurethane, polyurethane-polyurea or polyurea used for dressing glass-fiber. The invention is also dealt with a method of production of the indicated dispersion and with a sizing compound for glass-fiber. The indicated dispersion contains the blocked isocyanate groups bound with the polymer and in addition the reaction-capable hydroxyl or amino groups bound with the polymer. The dispersion is stable at storing up to 50 °C and is self-crossing at the temperature of 90°C up to 280°C. The dispersion represents a reaction product - a) at least one polyolic component; b) at least one di-, tri- and / or a polyisocyanate component, c) at least one hydrophilic nonionic or a (potentially) ionic component; d) at least one component, which is distinct from a)- or b)-, having molecular mass - 32-500 and at least one isocyanate-reaction capable group; and e) at least one monofunctional blocking component. The offered dispersions are suitable for use in the capacity of coatings for mineral emulsion carriers, textile and leather, lacquers and polishes for wood, and also may be applied as paint primers, bases, joint fillers or finishing coatings.

EFFECT: the invention allows to use the dispersions as coatings for mineral emulsion carriers, textile and leather, lacquers and polishes for wood and to applied them as paint primers, bases, joint fillers or finishing coatings.

21 cl, 4 ex

Ionic polyurethanes // 2214423
The invention relates to a charged polyurethanes, intended for use as an additive in the manufacture of paper

FIELD: chemistry.

SUBSTANCE: invention relates to blocked polyisocyanates, applied for obtaining of bonding means for thermohardening lacquers, paints and such other subjected to thermo processing systems, as adhesive substances or elastomers, they serve as means for net-like structure formation for polyol components. Blocked polyisocyanates have general formula (I): Said polyisocyanates are obtained by interaction of polyisocyanates of general formula (II)

with secondary amines of general formula (III)

EFFECT: obtaining of polyisocyanates, which ensure lower temperature of net-like structure formation and, therefore thermoprocessing, they are also stable as to crystallisation in organic solutions, which favours appreciable reduction of viscosity of such solutions, because it allows to reduce solvent content.

14 cl, 2 tbl, 15 ex

FIELD: chemistry.

SUBSTANCE: composition is characterised with viscosity 1500-25000 mPa·s at 25°C and contains fine-dispersed material 1-80 wt % at total polyol composition in polyol with equivalent weight 500 to 5000 and average nominal hydroxyl functionality 2 to 6, representing polyoxyethylene polyoxypropylene polyol with oxyethylene content 15-49 wt % at total oxyalkylene where oxyethylene group 20-80% being arranged on ends of polymer chains. Fine-dispersed material contains polyol reaction interaction with equivalent weight to 400, and diphenylmethandiisocyanate optionally containing its homologs with isocyanate functionality 3 or more, and/or modified versions of such polyisocyanates. There is also disclosed production process of such polyol compositions, and another polyol composition being mixed declared polyol composition and polyesterpolyol with average equivalent weight 500 or more, other than used to produce the composition specified above. There is also disclosed production process of elastic polyurethane foam with using said polyol compositions. Block (plate-shaped) or moulded elastic foam plastics are made of such polyol compositions.

EFFECT: improved load-sensitive characteristics, good fire resistance, easily recycled, internal defectless.

10 cl, 2 tbl

FIELD: technological processes, chemistry.

SUBSTANCE: invention is related to method for production of polyurethane foam with application of secondary waste of polyethylene terephtalate, and may be used for production of hard polyurethane foams. Polyurethane foam is produced by interaction of polyisocyanate with polyol component containing secondary waste of polyethylene terephtalate dissolved in triethanolamine or in mixture of mono-, di-, trichloracetic acids, in amount of not more than 67 wt % from total weight of polyol component. At that interaction is carried out at the ratio of polyol component : polyisocyanate as 1:1 - 1:2. Prepared polyurethane foams have good consumer properties, such as compression strength, oil-, heat resistance and reduced inflammability.

EFFECT: recycling of polymer wastes in the form of containers and package from polyethylene terephtalate, considerable reduction of polyurethane foam cost with simultaneous solution of environmental problems due to recycling of secondary polyethylene terephtalate.

16 ex

FIELD: chemistry.

SUBSTANCE: invention concerns humid-hardening compositions with high elasticity. Claimed composition includes at least one silane-functional polymer A, at least one amonisilane AS2, and at least one α-functional organodialcoxysilane in amount of 0.6-5.0 weight parts per 100 weight parts of polymer A. Additionally invention claims solidification of the composition and its application as sealants, glues and coatings, as well as methods of gluing and sealing using the composition.

EFFECT: humid-hardening composition with high elasticity and good mechanical and adhesive properties at the same time.

25 cl, 5 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention concerns method of obtaining polyurethanedi(met)acrylates applicable as binders for powder coatings applied on metal substrates, plastic parts, fiber-reinforced plastic parts. Polyurethanedi(met)acrylates are obtained by interaction of diisocyanate component, diol component and hydroxy-C2-C4-alkyl(met)acrylate at mol ratio of x:(x-1):2, where x takes any value from 2 to 5. 1,6-hexanediisocyanate comprises 50 to 80 mol % of diisocyanate component, and one or two diisocyanates selected out of defined diisocyanate group where mol content of respective diisocyanates amount to 100 mol % comprise(s) 20 to 50 mol %, so that each diisocyanate comprises at least 10 mol % of diisocyanate component. Diol component includes not more than four different diols, and at least one linear aliphatic alpha, omega-C2-C12-diol comprises 20 to 100 mol % of diol component, while at least one (cyclo)aliphatic diol different from linear aliphatic alpha, omega-C2-C12-diols comprises 0 to 80 mol %. Each diol of the diol component comprises at least 10 mol % of diol component, and mol content or respective diols amounts to 100 mol %. Due to the absence of solvent in polyurethanedi(met)acrylate production, further cleaning of end product is not required, thus increasing process product output.

EFFECT: higher acid resistance of coating films applied and solidified with the use of powder coatings containing claimed polyurethanedi(met)acrylates.

6 cl, 15 ex, 3 tbl

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