Polyisocyanurate based adhesive

FIELD: chemistry.

SUBSTANCE: present invention relates to a polyisocyanurate based adhesive which is obtained by reacting an organic polyisocyanate with a compound containing hydrogen atoms which are reactive towards isocyanate, in the presence of a trimerisation catalyst. The organic polyisocyanate is a polymer or prepolymer polyisocyanate, and content of the soft block in the adhesive ranges from 40 to 60 wt %. A reaction mixture for producing said adhesive is also described.

EFFECT: obtaining an adhesive capable of withstanding high maximum stress, having extremely fast setting and having a good and strong bond with the base, as well as high thermal stability, resistance to salty water and creep.

9 cl, 4 ex, 6 tbl

 

The present invention relates to adhesive compositions and adhesives on the basis of polyisocyanurate to adhesive compositions based polyisocyanurate and reactive mixtures for such adhesives.

Adhesives based on compounds containing more than one isocyanate group in the molecule, and compounds containing more than one hydroxyl group in the molecule, the so-called polyurethane adhesives or adhesives based on MDI, are used in many fields due to their excellent properties, simplicity and efficiency of their processing and high strength. One such area is the application package in a flexible container where the use of the laminated film or sheet obtained by the use of adhesive.

However, for some applications, the density of crosslinking standard polyurethane adhesives is too small, which prevents the use of the material in harsh climatic conditions. For example, the adhesives used in the car, should have high thermal stability and resistance to salt water.

For other applications, such as flexible packaging for food, speed of curing polyurethane adhesives are very low, which requires a long-term storage of the final laminated product in order to reduce the number of capable the moment of the emission of aromatic amines below the legally required limit.

For adhesives, in General, is finding a good and strong relationship with the substrate or substrates on which they are applied. Applied adhesives may become insolvent in accordance with at least two types of destruction. In accordance with the first type of fracture breaks the adhesive bond between the adhesive and the surface of the substrate, which is coupled to the adhesive. This type of fracture is also called “the destruction of the adhesive” or “adhesive destruction.” In accordance with the second type of fracture of the adhesive itself is destroyed by the action of the voltage applied to the adhesive, for example, through mutual displacement of the surfaces of the two substrates, which are held together by an adhesive. This type of fracture is also called “cohesive destruction.”

As for the cohesive and adhesive fracture the maximum voltage that can withstand the adhesive, indicates the bond strength provided by the adhesive. More than the maximum voltage that can withstand the adhesive, the stronger relationship and better cohesion, it is possible to avoid the adhesion of destruction.

The objective of the invention is to provide a strong adhesive that can withstand high maximum voltage. An additional object of the present invention is to provide the adhesive or adhesive composition based on polyisocyanates, to a lesser extent with one or more of the aforementioned disadvantages, or even lacking one or more of the aforementioned disadvantages.

Some of the adhesives according to the options of implementation of the present invention provide a communication suitable for use in more severe climatic conditions, as for example, at elevated temperatures or under the influence of salinity, for example, adhesives for automobile bodies, are subject to significant thermal effects and/or exposure to salt water.

Some of the adhesives according to the options of implementation of the present invention provide a communication suitable for use in flexible packaging for food products due to reduced migration of aromatic amines, that is, through migration rate below the legally required limit.

According to the first aspect of the present invention provided with an adhesive based on MDI, where the adhesive is obtained by the reaction of organic MDI with a compound containing reactive towards isocyanate hydrogen atoms, in the presence of a trimerization catalyst.

The presence of a trimerization catalyst has the effect, namely, that the adhesive on the basis of the MDI according to the present invention can turn into an adhesive based on what isocyanurate.

Some embodiments of the adhesives on the basis of MDI of the present invention have the advantage of extremely fast curing and, therefore, rapidly acquiring strength. Moreover, some embodiments of the adhesives on the basis of MDI of the present invention have extremely high density crosslinking (compared to currently known adhesives based on polyurethane), which increases the bond strength and resistance to adverse environments and creep. Increased strength also leads to the fact that the adhesive can withstand a higher maximum voltage before will happen cohesive or adhesive failure. Some embodiments of the adhesives on the basis of MDI of the present invention achieve a more rapid reduction of the presence and/or migration of the aromatic amine in utverzhdenii film that is extremely valuable, if an adhesive is used in applications related to food or medicine.

Organic polyisocyanates can be an aromatic or aliphatic organic polyisocyanates.

The organic polyisocyanate used in this invention may include any number of polyisocyanates, including named, but not without limitation them: colordistance (TDI), the isocyanates of the type diphenylmethanediisocyanate (MDI) and prepolymers of these isocyanates. Preferably, the polyisocyanate can have at least two aromatic rings in its structure and is a liquid product. Preferred are polymeric isocyanates having a functionality greater than 2.

The organic functionality MDI as such or in the form of a polymer or prepolymer polyisocyanates refers to the average number of isocyanate groups in the molecule, averaged over a statistically significant number of molecules present in the organic polyisocyanate.

If diphenylmethanediisocyanate (also known as methylenedianiline and called MDI) is used to obtain the adhesive of the present invention, diphenylmethanediisocyanate (MDI)used in the present invention, may be present in the form of its 2,4'-, 2,2'- and 4,4'-isomers and mixtures thereof, mixtures of diphenylmethanediisocyanate (MDI) and oligomers known in this area as “crude” or polymeric MDI (polymethylenepolyphenylisocyanate)having isocyanate functionality of more than 2, or any of their derivatives with urethane, which, allophanate, biuret, uretonimine, uretdione and/or iminoimidazolidine groups, and mixtures thereof.

Examples of other suitable body of the economic polyisocyanates are toluylenediisocyanate (also known as colorvision and called TDI), such as 2,4-TDI and 2,6-TDI in the form of any suitable mixture of isomers, hexamethylenediisocyanate (HMDI or HDI), isophoronediisocyanate (IPDI), butylanisole, trimethylhexamethylenediamine, di(isocyanatophenyl)methane, for example, 4,4'-diisocyanatohexane (H12MDI), isocyanatomethyl-1,8-octadienal and tetramethyldisilane (TMXDI), 1,5-naphthalenedisulfonate (NDI), p-delete the entry (PPDI), 1,4-cyclohexanediethanol (CDI), solidinvestment (TODI), any suitable mixture of these organic polyisocyanates and any suitable mixture of one or more of data of organic polyisocyanates with MDI in the form of its 2,4'-, 2,2'- and 4,4'-isomers and mixtures thereof, mixtures of diphenylmethanediisocyanate (MDI) and oligomers.

Preferred organic polyisocyanates used in this invention are polymeric or prepolymer organic polyisocyanates, such as quasiprobability, semiperiphery or full prepolymers which can be obtained by the reaction of polyisocyanates, such as organic polyisocyanates, as defined above, and preferably organic polyisocyanates based on MDI, with compounds containing reactive towards isocyanate hydrogen atoms. Under the polymer organic polyisocyanates should be understood polyisocyanate compounds having isocyanate number below 6.5%. Under full prepolymers based on organic polyisocyanates should be understood polyisocyanate compounds having isocyanate number in the range from 6.5% to 12%. Under semiperipheral should be understood polyisocyanate compounds having isocyanate number in the range from 12 to 22%. Under quasiprobability should be understood polyisocyanate compounds having isocyanate number in the range from 22 to 28%. It is clear that can also be used in other polyisocyanates having isocyanate more than 28%. Isocyanate content, isocyanate number or NCO-number means the ratio, expressed in percent, molecular weight of isocyanate groups in the isocyanate or polyisocyanate component to the total molecular weight isocyanate or polyisocyanate component.

Examples of compounds containing reactive towards isocyanate hydrogen atoms and appropriate in order to give suitable for use with polymer or prepolymer the polyisocyanates include alcohols, glycols, or even with a relatively high molecular weight simple polyether polyols and complex polyether polyols, mercaptans, carboxylic acids, such as politonalnye acids, amines, urea and amides. Particularly suitable polymeric or preprimary the polyisocyanates are the reaction products on the isocyanato with monatomic or polynuclear alcohols.

Polymer or prepolymer the polyisocyanates get traditional ways, for example by reaction polyhydroxylated compounds which have a molecular weight of from 400 to 5000, in particular mono - and polyhydroxylated polyether, optionally mixed with polynuclear alcohols which have a molecular weight less than 400, with excess quantities of polyisocyanates, such as aliphatic, cycloaliphatic, arylaliphatic, aromatic or heterocyclic polyisocyanates.

As simple examples of polyether polyols and can lead glycol, polypropyleneglycol, a copolymer of polypropylenglycol, ethylene glycol, polytetramethylene, polietilenglikol, poliatilenglikol, politicalideological and simple polyether polyols obtained by the copolymerization of disclosure cycle alkalisation, such as ethylene oxide and/or propylene oxide with reactive towards isocyanate initiators with the functionality of from 2 to 8. Under the functionality reactive with respect to isocyanate initiators should be understood the number of reactive towards isocyanate hydrogen atoms per molecule of initiator. Complex polyetherdiol obtained by the reaction of polynuclear alcohol and polonovski acid can be cited as examples of the complex is iavicoli. As examples of polynuclear alcohol can be mentioned ethylene glycol, polyethylene glycol, tetraethyleneglycol, polytetramethylene, 1,6-hexanediol, 3-methyl-1,5-pentanediol, 1,9-nonanediol, 2-methyl-1,8-octanediol and the like. As examples polonovski acid can be given phthalic acid, dimer acid, isophthalic acid, terephthalic acid, maleic acid, fumaric acid, adipic acid, sabotinova acid and the like.

Preferred polyols that can be used in the polymer or prepolymer the polyisocyanates, are polyols, which provide improved Miscibility polyol with an organic polyisocyanate, for example, through the use of polyols, including a high content of ethylene oxide. The term Miscibility is to be understood as the ability to mix without separation into two or more phases. It is clear that the components must be mixed within the right to use ratio.

In a particularly preferred variant of the invention, the polymer or prepolymer the polyisocyanates can be used as a polyisocyanate component having an average functionality of from 2 to 2.9, preferably from 2.0 to 2.5, the maximum viscosity of 6000 MPa·s and the isocyanate content (NCO-number) is 6 to 30 wt.%, preferably from 10 to 26 wt.%. The viscosity measured using a Brookfield viscometer (model DVII) with spindle 21 at a temperature of 25°C.

The second component of the present adhesive composition is reactive towards isocyanate compound. For example, there may be used any of the above compounds containing reactive towards isocyanate hydrogen atoms and appropriate in order to give suitable prepolymers.

The best adhesive properties get when both components, a polyisocyanate and a reactive toward isocyanate compound, easily mixed with each other. In this respect, good Miscibility means obtaining a clear solution after a good mixing. Here also the term Miscibility is to be understood as the ability to mix without separation into two or more phases. It is clear that the components must be mixed within the right to use ratio.

According to the present invention at least one of the compounds containing reactive towards isocyanate hydrogen atoms, and an organic polyisocyanate include at least one soft block and, optionally, more than one soft block. It is noted that the content of the soft block in the adhesive has an impact on working the e characteristics of the adhesive. Adhesives based on MDI of the present invention may have a content of the soft block from 20 to 70% by weight, more preferably from 40 to 60 wt.%. Found that the adhesives of the present invention, having a content of the soft block in the range from 20% to 70%, in particular in the range from 40% to 60%, can show a lower release of aromatic amine.

The content of the soft block is defined as wt.% reactive towards isocyanate compounds present as such and/or, if appropriate, present in prepolymer, which have a molecular weight (also referred to as MW) is greater than 500. Mass percentage is expressed relative to the weight of the total composition of the adhesive.

Consequently, it can be used either prepolymer that has the content of the soft block, for example, a relatively high content of soft block or/and along with this can be the quantity used, for example, a high number of reactive towards isocyanate compounds having more than 500 MW.

Soft blocks, thus, may be provided by a compound containing reactive towards isocyanate hydrogen atoms, and/or, if appropriate, the compounds containing reactive towards isocyanate hydrogen atoms are used to produce polyisocyanate p is polimerov, when the organic polyisocyanate is a polyisocyanate prepolymer.

Soft blocks can be fully secured compound containing reactive towards isocyanate hydrogen atoms, which is a component of the adhesive composition. Soft blocks can be fully provided with compounds containing reactive towards isocyanate hydrogen atoms are used to produce polyisocyanate prepolymers. Soft blocks can be partially provided with a compound containing reactive towards isocyanate hydrogen atoms, which is a component of the adhesive composition, and partly by compounds containing reactive towards isocyanate hydrogen atoms are used to produce polyisocyanate prepolymers. Preferably, at least 50% of the content of the soft block, i.e. at least half of the total mass, provided the content of the soft block is provided by a component of the adhesive composition, where this component provides reactive towards isocyanate hydrogen atoms of the adhesive composition.

The third component of the present adhesive composition is a catalyst that promotiom the trimerization of isocyanates, organic the ski MDI, part adhesive.

As a catalyst for the trimerization can be used all of these known catalysts, as of tetraalkylammonium hydroxides (e.g., a hydroxide of Tetramethylammonium, the hydroxide of tetraethylammonium and tetrabutylammonium hydroxide), salts of weak organic acids (e.g. acetate of Tetramethylammonium, acetate of tetraethylammonium and tetrabutylammonium acetate), hydroxides of dialkylhydroxylamines (for example, a hydroxide of trimethylhydroquinone, the hydroxide of trimethylhydroquinone, the hydroxide of triethylhexanoin and hydroxide of triethylcitrate), salts of weak organic acids (e.g. acetate of trimethylhydroquinone, acetate of trimethylhydroquinone, acetate of triethylhexanoin and acetate of triethylcitrate), tertiary amines (e.g. triethylamine, triethylenediamine, 1,5-diazabicyclo[4,3,0]-nonen-5, 1,8-diazabicyclo[5,4,0]-undecene-7 and 2,4,6-Tris(dimethylaminomethyl)phenol), metal salts alkylcarboxylic acids (such as acetic acid, Caproic acid, Caprylic acid, oktilovom acid, myristic acid and naphthenic acid) and the like, and combinations of two or more such catalysts.

According to preferred variants of implementation of the present invention, the catalyst or catalysts three is erinacei can be selected from the group of alkali metal salts of carboxylic acids, such as acetate or potassium 2-ethylhexanoate and potassium.

Used the amount of trimerization catalyst may be in the range of, for example, from 0.01 wt.% to 0.1 wt.%, preferably, from 0.02 to 1 wt.% in the calculation on the entire composition, more preferably from 0.02 to 0.50 wt.%, as for example, in the range from 0.1 to 0.2 wt.%.

Preferably, the catalyst may be dissolved in reactive towards isocyanate compound to achieve stability during storage.

The composition of the adhesives of the present invention can include other optional components, such as additives typically used in adhesive compositions, for example humectants, dispersants, thickeners, surfactants, dyes, mineral fillers, adhesion promoters (such as compounds containing silanol groups), defoamers and anti-microbial agents.

According to the second aspect of the present invention provided the reaction mixture to obtain an adhesive based on MDI. The reaction mixture comprises an organic polyisocyanate, a compound containing reactive towards isocyanate hydrogen atoms, and a trimerization catalyst.

The reaction mixture according to the second aspect of the present invention may be suitable for receiving an adhesive according to the first aspect of us is Vashego of the invention.

The elements of the reaction mixture, i.e. organic polyisocyanates, compounds containing reactive towards isocyanate hydrogen atoms, and a trimerization catalyst may be similar, or even identical, to the corresponding elements proposed for adhesive-based MDI according to the first aspect of the present invention.

The reaction mixture of the present invention may have a content of the soft block in the range from 20 to 70% by weight, more preferably from 40 to 60 wt.%.

The content of the soft block is defined as wt.% reactive towards isocyanate compounds present as such and, if appropriate, present in prepolymer, which have a molecular weight (also referred to as MW) is greater than 500. Mass percentage is expressed relative to the weight of the total composition of the reaction mixture.

Consequently, it can be used either prepolymer that has the content of the soft block, for example a sufficiently high content of soft block or/and along with this can be the quantity used, for example, a high number of reactive towards isocyanate compounds having more than 500 MW.

Soft blocks, thus, may be provided by a compound containing reactive towards isocyanate hydrogen atoms, and/or if the local, the compounds containing reactive towards isocyanate hydrogen atoms are used to produce polyisocyanate prepolymers, in the case where the organic polyisocyanate is a polyisocyanate prepolymer.

Soft blocks can be fully secured compound containing reactive towards isocyanate hydrogen atoms, which is a component of the reaction mixture. Soft blocks can be fully provided with compounds containing reactive towards isocyanate hydrogen atoms are used to produce polyisocyanate prepolymers. Soft blocks can be partially provided with a compound containing reactive towards isocyanate hydrogen atoms, which is a component of the reaction mixture, and partly by compounds containing reactive towards isocyanate hydrogen atoms are used to produce polyisocyanate prepolymers. Preferably, at least 50% of the content of the soft block, i.e. at least half of the total mass, provided the content of the soft block is provided by a component of the reaction mixture, where this component provides a reaction mixture of reactive towards isocyanate atoms odor is Yes.

According to a third aspect of the present invention the adhesive on the basis of the MDI according to the first aspect of the present invention is used to produce structural adhesive.

According to a fourth aspect of the present invention the adhesive on the basis of the MDI according to the first aspect of the present invention is used to produce laminated films.

Organic polyisocyanate, a reactive toward isocyanate compound, i.e. compounds containing reactive towards isocyanate hydrogen atoms, and a trimerization catalyst are mixed and the reaction mixture is used for an adhesive, such as adhesive layer laminated structure comprising a carrier structure, the layer of the second substrate and the adhesive layer, the binder carrying the layer of the second substrate. The application of the adhesive layer can be carried out, for example, applying the reaction mixture in the form of a coating on a carrier structure, for example, in the form of a film.

As a means of applying the adhesive according to the present invention can be mentioned known means of application, such as airless spray, fan spray, dipping, coating roller, brush and so on.

The conditions used for curing the adhesive layer after applying the reaction is Oh mixture on the carrier structure, for example, film, and attaching the second layer of the substrate during lamination using the adhesive according to the invention are preferably a temperature of from 20 to 150°C, particularly preferably from 60 to 100°C. When receiving the laminated structure, for example, laminated films, using the present adhesive film used as the carrier structure and/or the second layer of the substrate is not subject to special restrictions. In film quality can be mentioned: the complex film of the polyester type, such as polyethylene terephthalate or the like; a polyolefin film type, such as polyethylene, polypropylene or the like; a polyamide film type, such as nylon or the like; a metal foil such as aluminum foil, copper foil or the like; ethylenevinylacetate copolymer or the product of saponification; cellophane; polyvinyl chloride; grades; polystyrene; paper; and so on. Suitable for use can also be stretched product of the film and the product of the film surface (for example, treated by corona discharge or with the surface of the coating).

The adhesive of the present invention may also be suitable for use not only as a laminating proslo the key between the two layers of film, but also between three or more layers of film.

Various aspects of the present invention is illustrated, but not limited to, the following examples.

In these examples used the following ingredients:

As the organic polyisocyanate component:

SUPRASEC 1004: option MDI with an NCO-number 32,8%, available from Huntsman Polyurethanes (the content of the soft block 0,6%);

SUPRASEC 1007: prepolymer with NCO-number of 6.8% based on MDI and simple polyetherpolyols with MW 6000, available from Huntsman Polyurethanes (the content of the soft block of 75.1%);

SUPRASEC 1306: 4,4-MDI, available from Huntsman Polyurethanes (the content of the soft block 0%);

SUPRASEC 1412: prepolymer with NCO-number of 19% based on MDI and complex polyetherpolyols with 2000 MW, available from Huntsman Polyurethanes (the content of the soft block 37,0%);

SUPRASEC 2004: option MDI with an NCO-number 32,8%, available from Huntsman Polyurethanes (the content of the soft block 0,6%);

SUPRASEC 2008: prepolymer with NCO-number of 10.2% based on MDI and simple polyetherpolyols with MW 4000, available from Huntsman Polyurethanes (the content of the soft block 65,47%);

SUPRASEC 2020: option MDI with an NCO-number of 29.6%, available from Huntsman Polyurethanes (the content of the soft block 0%);

SUPRASEC 2024: prepolymer with NCO-number of 23% based on MDI and simple polyetherpolyols with 125 MW, available from Huntsman Polyurethanes (the content of the soft block 0%);

SUPRASEC 2026: prepolymer with NCO-number 21,4% based on the mixture of MDI and a mixture of simple polyetherpolyols, available from Huntsman Polyurethanes (content, the softer the th block of 22.3%);

SUPRASEC 2029: prepolymer with NCO-number of 24.5%, based on MDI and simple polyetherpolyols with 125 MW, available from Huntsman Polyurethanes (the content of the soft block 0%);

SUPRASEC 2045: prepolymer with NCO-16% based on MDI and simple polyether polyols with 125 MW and 2000, available from Huntsman Polyurethanes (the content of the soft block 42,53%);

SUPRASEC 2054: prepolymer with NCO-15% based on MDI and simple polyetherpolyols with 2000 MW, available from Huntsman Polyurethanes (the content of the soft block 48.7 per cent);

SUPRASEC 2058: prepolymer with NCO-number of 15.4%, based on MDI and simple polyetherpolyols with 2000 MW, available from Huntsman Polyurethanes (the content of the soft block 47.9 per cent);

SUPRASEC 2060: prepolymer with NCO-16% based on MDI and simple polyetherpolyols with 2000 MW, available from Huntsman Polyurethanes (the content of the soft block 44,3%);

SUPRASEC 2067: prepolymer with NCO-number 19,3% based on MDI and simple polyetherpolyols with 2000 MW, available from Huntsman Polyurethanes (the content of the soft block 35.9 per cent);

SUPRASEC 2344: prepolymer with NCO-number of 15.5% based on MDI and simple polyether polyols with MW 2000 and 2400, available from Huntsman Polyurethanes (the content of the soft block 48%);

SUPRASEC 2405: prepolymer with NCO-number of 28.8%, based on MDI and simple polyetherpolyols with 750 MW, available from Huntsman Polyurethanes (the content of the soft block 3%);

SUPRASEC 2496: option MDI with an NCO-number of 31.3%, available from Huntsman Polyurethanes (the content of the soft block 0%);

SUPRASEC 2642: option MDI with an NCO-number 32,7%, available from Huntsman Polyurethanes (the content of the soft block 0%;

SUPRASEC 3030: a mixture of 70 wt.% 4,4-MDI and 30 wt.% 2,4-MDI, available from Huntsman Polyurethanes (the content of the soft block 0%);

SUPRASEC 3050: a mixture of 50 wt.% 4,4-MDI and 50 wt.% 2,4-MDI, available from Huntsman Polyurethanes (the content of the soft block 0%);

SUPRASEC 4102: option MDI with an NCO-number of 29.6%, available from Huntsman Polyurethanes (the content of the soft block 0%);

Examples of components containing reactive towards isocyanate hydrogen atoms, are:

DALTOCEL F444: simple polyetherpolyols with 4360 MW, available from Huntsman Polyurethanes;

DALTOCEL F456: simple polyetherpolyols with 2000 MW, available from Huntsman Polyurethanes;

DALTOCEL F526: simple polyetherpolyols with 1300 MW, available from Huntsman Polyurethanes;

DALTOLAC R 251: simple polyetherpolyols with 673 MW, available from Huntsman Polyurethanes;

DALTOREZ P775: complex polyetherpolyols with 2500 MW, available from Huntsman Polyurethanes;

Poly BD 45 HTLO: polybutadienes with 2800 MW, available from Sartomer;

An example of a suitable trimerization catalyst is a Catalyst LB, that is, the trimerization catalyst based on metal salt, available from Huntsman Polyurethanes. The potassium hydroxide is also an example of a trimerization catalyst.

SUPRASEC, DALTOLAC, DALTOREZ and DALTOCEL are trademarks of Huntsman International LLC.

Example 1

In this example tested the effect of Miscibility of the system on the strength of the adhesive.

In one test SUPRASEC 2029 was utverjdali various polyols, shown below in Table 1, in the mass the PTO ratio of 50:50 in the presence of Catalyst b in the amount of 0.2 wt.%.

The maximum stress (in MPa) was determined according to standard EN 204-205.

Miscibility was determined by visual examination and were evaluated as shown in Table 1, where “+” indicates a clear solution after good mixing and “-” indicates an opaque solution after good mixing.

Table 1
PolyolMiscibilityThe maximum voltage
DALTOCEL F444+9,8
DALTOCEL F456+8
Poly BD 45 HTLO-6,8
DALTOREZ P775-1,7

In a similar test used SUPRASEC 2024 instead of SUPRASEC 2029. The results (having the same meaning as in Table 1) are shown in Table 2.

Table 2
PolyolMiscibilityMax output the second voltage
DALTOCEL F444-0,3
DALTOCEL F456+10
Poly BD 45 HTLO-4,6
DALTOREZ P775+8,5

Both test data show that mixing has a significant impact on the performance of the system as adhesive.

Example 2

This example provides information about the influence of the content of the soft block on adhesive properties.

Organized the screening of several commercially available MDI from Huntsman in combination with DALTOCEL F444 mass ratio of 19:1 (100 parts by weight (pbw) of MDI and 5 pbw of polyol).

The two components were mixed in the presence of Catalyst b in the amount of 0.2 wt.% and put it in the form of adhesive to create a connection steel/steel with a thickness of 80 μm, which was then utverjdali in an oven at 80°C for 1 hour. After cooling and aging in normal climatic conditions, the adhesion properties were measured according to standard EN 204-205. Cohesion destruction (CF) means that the strength of cohesion, i.e. the strength of the adhesive layer, less than the strength of the edge connection is Oia between the adhesive and the substrate, in this particular case, the steel surface, on the boundary surface between the adhesive and substrate. The adhesive layer will be destroyed, leaving the adhesive on the two surfaces of the two substrates, which linked the adhesive. Adhesive failure (AF) means that the strength of cohesion, i.e. the strength of the adhesive layer, more strength edge connection between the adhesive and the substrate, in this case steel surface, on the boundary surface between the adhesive and substrate. Communication on one surface of the substrate between the substrate and the adhesive will break down, leaving the adhesive on only one surface of the two substrates, which linked the adhesive. AF and CF represent the parameters measured during the measurement of the adhesion of the sample.

The results are presented in Table 3. The content of the soft block of the part is also specified.

Table 3
The polyisocyanateSoft block (wt.%)Maximum stress (MPa)Destruction
SUPRASEC 20204,81,4AF
UPRASEC 2496 4,81,7CF
SUPRASEC 26424,81,6CF
SUPRASEC 30504,81,2CF
SUPRASEC 4102a 4.91,6AF
SUPRASEC 10045,31,,5CF
SUPRASEC 20045,31,5CF
SUPRASEC 24057,61,4CF
SUPRASEC 202414,81,8AF
SUPRASEC 202627,34,6AF
SUPRASEC 141240,4the 11.6AF
SUPRASEC 2060 4711CF
SUPRASEC 205850,410,6CF
SUPRASEC 2344a 50.510AF
SUPRASEC 205451,110,2CF
SUPRASEC 200867,14,1AF
SUPRASEC 100776,31,2AF

Increased the maximum voltage observed for the content of the soft block in the range from 20 wt.% up to 70 wt.%, when the optimum in the range from 40 to 60 wt.% the content of the soft block.

Example 3

The influence of the content of the soft block on the strength of the adhesive was also tested by adding different amounts of DALTOCEL F444 to SUPRASEC 2029 in the presence of Catalyst b in the amount of 0.2 wt.% (relative to the total weight of the adhesive composition). The ratio of isocyanate/polyol in Table 4 indicates the mass ratio of “x” parts by weight SUPRASEC 2029 to “y” parts by weight DALTOCEL F444.

Table 4
The ratio of isocyanate/polyolSoft block (wt.%)Maximum stress (MPa)Destruction
19/1the 9.73,4AF
3/128,74,1AF
1/152,610,3CF
0,5/168,42,7AF

It is clear that the content of the soft block affects the maximum voltage that can withstand the adhesive before its destruction. The preferred content of the soft block are in the range from 20% to 70%, more preferably in the range from 40% to 60%.

Example 4

This example illustrates the improvement in the speed of curing of the adhesive system based on MDI, representing an adhesive system based polyisocyanurate, according to the present invention compared to adhesives based on polyurethane known is the level of technology.

SUPRASEC 1306, SUPRASEC 3030 and SUPRASEC 3050, each, were injected into reaction with polypropylenglycol with 2000 MW (PPG2000), receiving the polyisocyanate prepolymers with NCO-16 wt.%. In Table 5, the second and the third column shows the ratio of the two components, which are introduced in the reaction to obtain prepolymers. SUPRASEC 2045 and SUPRASEC 2344 also represent the polyisocyanate prepolymers. These prepolymers were utverjdali castor oil ratio (prepolymer/castor oil 105:100) for 10 days in a normal climate with obtaining film. Then the obtained film was kept for 10 days at 50°C in acidic solution (3% acetic acid in aqueous solution). The solution was analyzed to determine the remaining aromatic amines (DADPM).

The results are shown in Table 5 (where “S” refers to SUPRASEC).

Table 5
Prepolymer: componentswt.% soft block in prepolymerwt.% free diisocyanate (MDI) in prepolymerThe remaining DADPM (parts per billion hours/bn)
S1306+PPG 200058,241,87
S3030+PPG 2000 58,241,823
S204542,541,826
S3050+PPG 200058,241,816
S234448,039,510

The results show that only some of the standard adhesives based on polyurethane satisfy the statutory requirement of maximum migration in 20 hours/billion aromatic amines even after 10 days of curing. The system is based on SUPRASEC 2344 meets legal requirements, but it is necessary to store at least 10 days; measured after 7 days of storage given 72 hours/billion aromatic amines.

For comparison, the adhesives on the basis of polyisocyanurate of the present invention were evaluated for their destruction with the release of aromatic amines. SUPRASEC 1412 and SUPRASEC 2344, respectively, were used as MDI, and both were utverjdali using DALTOLAC R 251 and DALTOCEL F526 (DALTOLAC R 251 and DALTOCEL F526 used in a mass ratio of 4/1). The mass ratio of SUPRASEC 2344 to the combined weight of DALTOCEL F526 and DALTOLAC equal to 4/1. DALTOCEL F526 includes 0.01% of the hydroxide is potassium. Casting was utverjdali for 30 minutes at 80°C, cooled to room temperature and not later than 4 hours after it was kept for 10 days at 50°C in the test solution mentioned above. Then determined the amount of aromatic amines in solution.

For systems based on SUPRASEC 1412 result was a 13,5 h/bn aromatic amines, for systems based on SUPRASEC 2344 number of aromatic amines was 12.7 hours/bn Consequently, both systems meet legal requirements through day after treatment. The result is a reduction of the curing time, therefore, a significant cost reduction in the decrease in working capital and equity capital, when these adhesives are used to obtain a laminated film for use in the food industry.

In another example, as shown in Table 6, SUPRASEC 2344 introduced into the reaction with the polyol, representing castor oil (isocyanate index 105), to obtain a polyisocyanate adhesive according to the prior art (composition (A)), or with a polyol in the presence of a trimerization catalyst, receiving as an adhesive with the content of the soft block in the preferred range from 20% to 70% (composition (C)), and the other adhesive content of the soft block is not in this preferred range (with the becoming (B)).

The release of a number of aromatic amines (DADPM) was determined as described above.

Table 6
Ingredients% soft blockDADPM immediately after curingDADPM after 10 days
(A) S2344 + castor oil5820427
(B) S2344 + Daltolac R251/Daltocel F 526 (ratio of ISO/polyol 1/1) + the catalyst for the trimerization7416022
(C) S2344 + Daltolac R251/Daltocel F 526 (ratio of ISO/polyol 4/1) + the catalyst for the trimerization58135

Also, this example shows that the provision of the adhesive based on MDI, including the trimerization catalyst (thus providing adhesive on the basis of polyisocyanurate) with the content of the soft block in the preferred range from 20% to 70%, more preferably in the range from 40% to 60%, leads to a significant reduction of release of the fragrance is ical Amin.

In this case also, the use of these adhesives leads to a reduction in the curing time, therefore, to a significant cost reduction in the decrease in working capital and equity capital, when these adhesives are used to obtain a laminated film for use in the food industry.

1. The adhesive on the basis of polyisocyanurate obtained by the reaction of organic MDI with a compound containing reactive towards isocyanate hydrogen atoms, in the presence of a trimerization catalyst, where the organic polyisocyanate is a polymeric or preprimary the polyisocyanate, and the content of the soft block in the adhesive is in the range from 40 to 60 wt.%.

2. The adhesive according to claim 1, where the organic polyisocyanate and a compound containing reactive towards isocyanate hydrogen atoms, are mixed with each other.

3. The adhesive according to any one of claims 1 and 2, where at least 50% of the content of the soft block is provided with a compound containing reactive towards isocyanate hydrogen atoms present in the adhesive.

4. The adhesive according to claim 1, where the trimerization catalyst used in an amount of from 0.01 to 1% by weight calculated on the whole composition.

5. The adhesive according to claim 1, where the catalyst for the trimerization represents the ol carboxylic acid alkali metal.

6. The reaction mixture to obtain adhesive-based polyisocyanurate as defined in any one of claims 1 to 5, where the reaction mixture comprises an organic polyisocyanate, which is a polymer or prepolymer polyisocyanate, a compound containing reactive towards isocyanate hydrogen atoms, and a trimerization catalyst, where the content of the soft block in the reaction mixture is in the range from 40 to 60 wt.%.

7. The reaction mixture of claim 6, where at least 50% of the content of the soft block is provided with a compound containing reactive towards isocyanate hydrogen atoms present in the adhesive.

8. The application of the adhesive on the basis of polyisocyanurate as defined in any one of claims 1 to 5, to obtain a laminated film.

9. The application of the adhesive on the basis of polyisocyanurate as defined in any one of claims 1 to 5, to obtain a structural adhesive.



 

Same patents:

Gluing method // 2451040

FIELD: chemistry.

SUBSTANCE: method involves applying a UV curable adhesive resin composition, containing a photolatent base, onto at least one transparent surface of at least one of a first and a second substrate. The substrates are then brought together so that said adhesive composition lies in between. The adhesive composition is then exposed to actinic radiation for curing. The UV curable adhesive is a OH/NCO system or SH/NCO system. In another version of the gluing method, the first and second substrates are brought together after exposing the adhesive composition in between to actinic radiation.

EFFECT: disclosed gluing method enables faster curing of the adhesive.

5 cl, 10 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: composition contains one or more urethane prepolymers, having isocyanate residues, one or more compounds which catalyse the reaction of isocyanate residues with water or a compound which contains active hydrogen and one or more alpha-hydrocarbyl silane compounds. The urethane propolymer additionally contains a silane functional group. The composition additionally contains a compound or a polymer, containing silane residues. The composition additionally contains one or more compounds which catalyse silanol condensation. The composition is deposited onto the surface of glass or plastic with a coating or onto the surface of a substrate to obtain a sealant, then brought into contact and the composition is then hardened. The composition is placed between the glass or plastic with coating and the substrate. The sealing composition is used for binding an unprimed surface with a coating, such as a window lintel with glass with a transparent plastic, coated with an abrasive-resistant coating or with glass or plastic with a coating, additionally coated with glass cement, such as ceramic or organic glass cement.

EFFECT: improved composition properties.

10 cl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing dispersions of blocked polyurethane prepolymers, use of dispersions obtained using said method to produce coating agents, adhesive substances and sealants and elastomers, said application products themselves, as well as substrates provided with coating agents. The method involves the following: I) a blocked polyurethane prepolymer is obtained first by reacting a) 100 equivalent % of at least one polyisocyanate with b) 50-90 equivalent %, in terms of isocyanate reactive groups, of a thermally split blocking agent, c) 5-45 equivalent %, in terms of isocyanate reactive groups, monohydroxycarboxylic acid as a hydrophilic agent and d) 0-25 equivalent %, in terms of isocyanate reactive groups, of polyhydroxycarboxylic acid as a hydrophilic agent and e) 0-15 equivalent %, in terms of isocyanate reactive groups, of at least one, in terms of isocyanate reactive groups, di- or polyfunctional component of a chain extender with molecular weight from 32 to 350 g/mol, where i) this takes place using (partially) water-miscible organic solvents which are inert to NCO-groups and have boiling point lower than 120°C (at 1013 mbar), ii) and they are used in such an amount that the polyurethane prepolymer contained in the reaction solution after complete conversion ranges from 70 to 98 wt %. Further, II) the polyurethane prepolymer solution obtained at step (I) is dispersed in water, where before, during or after dispersion, deprotonation of carboxylic acid groups with a base takes place at least partially, and then III) if needed, the contained organic solvent is completely removed during dispersion via distillation.

EFFECT: obtaining polyurethane dispersions which are stable during storage, endow said products of their application with good optical properties, high resistance to chemical reagents and pendulum hardness.

13 cl, 10 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: adhesive composition contains perchlorovinyl resin and an organic solvent. The composition contains dichloroethane as an organic solvent, as well as dibutyl phthalate and a modifier in form of epoxy diane resin ED-20 and N-nitrosodiphenylamine, with the following ratio of components in pts.wt: perchlorovinyl resin 20, organic solvent 80.0, dibutyl phthalate 1.0, epoxy diane resin ED-20 10.0-15.0, N-nitrosodiphenylamine 0.33-1.11.

EFFECT: invention increases strength when gluing together vulcanised rubber.

2 tbl

FIELD: chemistry.

SUBSTANCE: adhesive composition contains polychloroprene rubber nairit DP, butyl phenol formaldehyde resin 101 K, water, zinc oxide, magnesium oxide and an organic solvent which is a mixture of ethyl acetate and nefras. The composition additionally contains a modifier obtained first as a result of room temperature-reaction of an aliphatic amine - triethanolamine or polyethylene polyamine and silica filler Rosil R-175, with the following ratio of components, wt %: polychloroprene rubber nairit DP - 90.0, butyl phenol formaldehyde resin 101K - 90.0, water - 3.0, zinc oxide - 5.0, magnesium oxide - 11.0, organic solvent - 800.0, aliphatic amine - 0.1-0.2, silica filler Rosil R-175 - 10.0.

EFFECT: invention increases strength when gluing together vulcanised rubber.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to compositions based on silane-functional polymers, which are suitable for adhesive binding, sealing and coating porous substrates. The composition contains at least one silane-functional polymer, at least one organosilane and at least one organotitanate. The silane-functional polymer is a silane-functional polyurethane polymer or can be obtained through hydrosilylation of polymers, having terminal double bonds. The organosilane contains at least one sulphur atom. The organotitanate has ligands bound to a titanium atom through an oxygen-titanium bond. The ligands are selected from a group consisting of an alkoxy group, a sulphate group, a carboxylate group, a dialkylphosphate group and an acetylacetonate group. Content of the organotitanate in the composition is between 0.1 and 10 wt %. Content of the organosilane in the composition is between 0.1 and 7 wt %. The composition also contains at least one filler, content of which is between 10 and 70 wt %. The composition is used for binding, sealing and coating substrates made from concrete, mortar, brick, tiles, plaster, natural stone such as granite or marble, glass, glass-ceramic, metal or metal alloy, wood, plastic and lacquer.

EFFECT: obtained article, which is bound, sealed or coated using the composition, is a building structure, more specifically a building or civil construction structure; the composition guarantees efficient adhesion to a substrate even after storage in the presence of water.

17 cl, 1 tbl

FIELD: chemistry.

SUBSTANCE: foamed material consists of a single-component, moisture-curable composition containing at least one polymer P, having isocyanate groups and/or alkoxy silane groups, 10-60 vol. % of at least one gas and 10-30 wt % soot per total weight of the single-component foamed material which is curable in a moist medium. Application of the obtained foamed material is carried out primarily at temperature in the range of 10-40°C. The degree of foaming of the composition and, consequently, gas content of the single-component, moisture-curable foamed material varies during its application.

EFFECT: obtaining single-component, moisture-curable foamed material which can be used as an adhesive or a sealant/packing material for producing coatings or filling hollow structures with foamed material, particularly vehicles.

20 cl, 4 dwg, 1 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to a single-component primer composition for substrates made from glass and/or plastic, having setting time of at least 1 month. Said composition includes: a base primer composition including (a) an isocyanate functional prepolymer derived from the reaction of an aliphatic polyisocyanate and a polyol, and which is partially reacted with an amino group of a secondary aminosilane, wherein the aminosilane includes two or three methoxy groups bound to a silicon atom, two or three ethoxy groups bound to a silicon atom, or a combination thereof; (b) an isocyanate functional prepolymer with an isocyanate content greater than 1%, which is the reaction product of an aromatic polyisocyanate and a polyol of Mn>300; and (c) at least one solvent for the components (a) and (b); and an ingredient including an oxazolidine ring or derivative thereof; a second adduct (i) of an aromatic polyisocyanate and (ii) mercaptosilane, aminosilane or both; a film-forming polymer. The invention also describes glued structure having a glass or plastic panel, containing the said composition, a method of gluing the glass panel to the frame of a vehicle, comprising a step for applying said composition and a glued structure made using said method.

EFFECT: obtaining primer with long setting time, which exhibits excellent stability during storage, during application of which the surface does not swell.

13 cl, 4 tbl

FIELD: chemistry.

SUBSTANCE: disclosed is an aqueous polyurethane dispersion which does not contain N-methylpyrrolidone and solvents and contains a product of reaction of a mixture of 1-isocyanate-3,3,5-trimethyl-5-isocyanatemethylcyclohexane and 4,4'-diisocyanatedicyclohexylmethane, one or more polyols with average molecular weight of 500-3000, one or more compounds with at least one OH- or NH- functional group, which contain a carboxyl and/or carboxylate group, where at least 50 mol % acid incorporated in the overall resin consists of dimethylol propionic acid, one or more polyols and/or polyamines with average molecular weight less than 500 and, if necessary, one or more monoalcohols and/or monoamines, as well as preparation method thereof and use thereof as an agent for coatings having good resistance characteristics.

EFFECT: obtaining a polyurethane dispersion which does not contain N-methylpyrrolidone and solvents, and contains a hydrophilization agent in form of dimethylol propionic acid, which can be stored for over 8 weeks and is suitable for making transparent shining coatings with high resistance to dyes.

8 cl, 2 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a moisture-curable composition for adhesive compounds, sealing compounds, coatings or linings, application thereof as an adhesive, sealing compound or coating, a cured composition obtained by reacting water with such a composition, methods of gluing bases and sealing using said composition, as well as adhesive and sealed articles made using said methods, respectively. The moisture-curable composition contains (i) at least one isocyanate-containing polyurethane polymer P, which is obtained from at least one polyisocyanate and at least one polyol, and (ii) at least one aldimine-containing compound of formula (I): .

EFFECT: preparation of compounds which are stable during storage, can be quickly moisture-cured without bubbles, do not cause smells during curing and are suitable for use as precursors of synthetic materials.

25 cl, 34 ex, 10 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to microcapsules used in agrochemical compositions as part of any type of composition used to in agriculture, as well for microencapsulation of pharmaceutical and medical compounds, flame-retardants, phase transition materials, thermosetting materials, ink and catalysts. The microcapsules contain a material with water solubility of less than 750 mg/l at 20°C. The wall of the microcapsules is formed via interphase polymerisation of materials which form the wall: (a) aliphatic isocyanate(s), and (b) aromatic isocyanate(s), and (c) compound(s) of formula (I), acetylene carbamide derivatives

,

where R1, R3, R5, R7 independently denote methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butylene, tert-butyl; R2, R4, R6, R8 independently denote hydrogen, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl; R9, R10 denote hydrogen or hydroxymethyl; including oligomeric forms of compounds (I), where the number of moles of compounds (I) ranges from 2 to 10; and the microcapsules have average diameter from 0.3 to 25 mcm when using a conventional laser diffraction analyser to measure particle size with preliminary conventional dissolution in water while stirring. The invention also describes a method of producing an agrochemical composition of a typical encapsulated suspension, containing said microcapsules, and versions of using said microcapsules.

EFFECT: obtaining microcapsules with possibility of controlling the speed of release of the microencapsulated material, and improvement of the toxicological profile of the microcapsules and compositions containing said microcapsules.

12 cl, 12 ex, 13 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing polyisocyanurate composite material, involving merging polyisocyanate, monoatomic alcohol polyester and a trimerisation catalyst, - these three components, merged together, are called a "reactive binding composition", - with binding material to form a reactive composite material, which allows, during the next step, high-temperature reaction of said reactive composite material, in which the amount of the reactive binding composition is equal to 1-60 wt % and the amount of the binding material is equal to 40-99 wt %, both in terms of the amount of the reactive binding composition plus the amount of the binding material, and in which the amount of polyisocyanate and monoatomic alcohol is such that the reactive binding composition index is equal to 150-10000, wherein the monoatoic alcohol polyester has average equivalent weight of 10-2500 and content of oxyethylene is at least 65 wt %. The invention also describes said reactive composite material and composite materials obtained using said method and from disclosed reactive composite materials.

EFFECT: obtaining polyisocyanurate composite material, having good thermal stability, fire-resistant properties and very low level of remaining free NCO groups.

15 cl, 5 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to an amphiphilic polymer composition used in compositions of active substances used for protecting plants from pathogens, phytopathogens or wood destroying fungi, insects etc, or in compositions of additives to food products. The given composition is obtained by reacting (i) at least one hydrophobic polymer P1, which is made from ethylene unsaturated monomers M1, and (ii) at least one hydrophilic polymer P2, which is in form of aliphatic polyethers consisting of at least 50 wt % ethylene oxide groups, with (iii) at least one compound V containing isocyanate groups, which has functionality of 1.5-4.5 relative the isocyanate groups, and is selected from aliphatic, cycloaliphatic and aromatic di- and polyisocyanates, as well as from isocyanurates, allophanates, uretdiones and biurets. Ethylene unsaturated monomers M1 contain: (a1) from 50 to 99 wt % in terms of total amount of monomers M1, monomers M1a of general formula I and a2) from 1 to 50 wt % in terms of total amount of monomers M1, neutral monoethylene unsaturated monomers M1b, which differ from monomers M1a, and are selected from vinylaromatic monomers, C11-C20alkylacrylates and C11-C20alkylmethacrylates.

EFFECT: amphiphilic polymer composition promotes efficient solubilisation and stabilisation of water-insoluble active substances, which leads to increase in stability of such compositions of active substances with respect to demulsification processes during prolonged storage, during addition of an electrolyte and during dilution with water.

25 cl, 9 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: catalyst is a product of reacting compounds (a) and (b). Compound (a) is a mixture of (i) a compound which contains at least one opxy group with (ii) a compound which contains an alcohol, amino-, thio- or carboxyl group and an aldehyde or ketone group. Compound (b) contains at least one primary amino group and at least one tertiary amino group.

EFFECT: use of the proposed non-volatile catalyst to produce polyurethane foam reduces the need for traditional volatile amine catalysts, speeds up bonding of organic polyisocyanates to polyhydroxyl or polyamino compounds and the reaction between isocyanate and foaming substance, and reduces the time for holding polyurethane foam material in the die mould and improves characteristics of the foam.

14 cl, 24 ex

FIELD: chemistry.

SUBSTANCE: invention relates to the method of producing polyisocyanate, which involves (a) formation of polyisocyanate in a reaction system through reaction of polyamine, on which polyisocyanate is based, in a solution of inert solvent with phosgene, optionally in a solution of inert solvent; (b) separation of solvent from polyisocyanate, formed at stage (a) by evaporation or fractional distillation; (c) bringing the separated solvent to temperature between 10°C and 150°C and subsequent processing of the separated solvent with isocyanate trimerisation catalyst for trimerisation of isocyanate impurities in the separated solvent; (d) transferring the processed solvent from stage (c) to the reaction system at stage (a).

EFFECT: repeated use of solvent in the process, free from trace amounts of isocyanate and with low level of impurities.

10 cl, 1 dwg

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

FIELD: chemistry.

SUBSTANCE: invention concerns method of obtaining compounded foam polyurethanes for operation as shock, heat and sound absorbing layers. Compounded foam polyurethanes are obtained by interaction of 100 weight parts of polyol component and 20 weight parts of polyisocyanate component, where polyol component is mixed preliminarily with 70-100 weight parts of rubber chips, and reaction mix is foamed and solidified at 160°C or higher to component destruction temperature. Butadiene and piperylene copolymer with 1200-3200 molecular weight and 0.8-1.1% content of hydroxylic groups is used as polyol component, and polymethylenepolyphenylisocyanate with 29-31% content of isocyanate groups is used as polyisocyanate component.

EFFECT: simplified composition and technological process for mix processing in elastic foam material production, facilitated utilisation of rubber industry waste, particularly rubber chips, and higher compounding degree and tension at 40% compression of foam polyurethanes obtained by the claimed method.

2 ex, 3 tbl

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: polymer materials.

SUBSTANCE: invention relates to compositions of molded polyurethane elastomers showing high physico-mechanical characteristics and providing high cyclic stability of products at alternate loadings within a wide operation temperature range. Invention may be used in rubber industry to manufacture cast tires and rolls for monorail vehicles. Composition according to invention contains polyoxytetramethylene glycol, mixture of 2,4-tolylenediisocyanate and 1,6-hexamethylenediisocyanate at molar ratio (0.8-0.9):0.1, and 3,3'-dichloro-4,4'-diaminodiphenylmethane in the form of solution in polyoxytetramethylene glycol at molar ratio (0.67-0.7):(0.29-0.30) as liquid hardener.

EFFECT: enabled use of polyurethane composition for molded elastomers.

2 cl, 2 tbl, 11 ex

FIELD: chemistry of polymers.

SUBSTANCE: invention relates to aromatic polyurethane polyols used as components of priming compositions. Invention describes the priming composition comprising aromatic polyurethane polyol including product of reaction: (a) at least one diol component among number of α,β-diols, α,γ-diols and their mixtures; (b) at least one triisocyanate; (c) at least one diisocyanate wherein at least one isocyanate is aromatic one, and molecular mass or aromatic polyurethane polyol is 3000 Da, not above, and a cross-linking agent also. Prepared aromatic polyurethane polyol shows viscosity value by Brookfield at the level 8260 centipoises, OH-number 192.6 KOH/g and the dispersity (Mn/Mw) at the level 3.0. Priming compositions prepared by using indicated aromatic polyurethane polyol are useful in finishing large means of transportation, for example, trains, trucks, buses and airplanes, in particular, in vehicle body works. Also, invention relates methods for applying priming compositions on support comprising applying indicated compositions, and to a method for finishing car in repairs comprising applying the indicated priming composition.

EFFECT: improved and valuable properties of composition.

11 cl, 5 tbl, 12 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing viscoelastic polyurethane plasticised foam plastic with open cells produced from renewable material, used in many engineering fields, particularly inside motorcars, in furniture and mattresses or sound insulation. The method involves reaction of a) polyisocyanates with b) a mixture of polyols and c) foaming agents. The mixture of polyols b) consists of bi) compounds with at least two hydrogen atoms which are active with respect to isocyanate groups, and hydroxyl number ranging from 20 to 100 mg KOH/g, bii) a compound with at least two hydrogen atoms which are active with respect to isocyanate groups, and hydroxyl number ranging from 100 to 800 mg KOH/g, and biii) a compound with at least one and a maximum of two hydrogen atoms which are active with respect to isocyanate groups, and hydroxyl number ranging from 100 to 800 mg KOH/g, wherein each of the components bi) and bii) contains at least one compound which contains renewable material or reaction products thereof.

EFFECT: obtaining viscoelastic polyurethane plasticised foam plastic produced from renewable material, having good mechanical properties, very low smell and emissions, and also have prolonged stability, particularly when stored in a warm humid environment.

13 cl, 4 ex, 1 tbl

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