Radiation cross-linkable and thermally cross-linkable polyurethane systems based on block copolymers capable of reacting with isocyanates

FIELD: chemistry.

SUBSTANCE: invention relates to polyurethane compositions for producing holographic media which contain (A) one or more polyisocyanates, (B) one or more block copolymers which react with isocyanate, (C) one or more compounds having groups which, during actinic exposure, react with ethylenically unsaturated compounds with polymerisation, (D) optionally one or more free-radical stabilisers and (E) one or more photoinitiators. Topographic media obtained from such polyurethane compositions are also described.

EFFECT: obtaining polyurethane systems having excellent compatibility of the polyurethane polymer matrix with radiation-curable olefinically unsaturated monomers in the composition, and have considerably higher transparency.

13 cl, 3 tbl

 

Cross-reference to related application

The present application claims the priority of provisional application No. 60/922883, filed on April 11, 2007, in accordance with 35 U.S.C. §119(e).

The scope of the invention

The present invention relates to polyurethane systems that harden with crosslinking under the action of irradiation and temperature, and to their use for the production of holographic media.

The prior art inventions

In the production of holographic media, as described in US 6743552, the information is stored in the polymer layer mainly composed of a polymer matrix and evenly distributed it is very specific monomers capable of polymerization. The polymer matrix may be based polyurethane. It usually is obtained from the NCO-functional prepolymers which cross stitch polyols, such as polymeric ethers, and polymeric esters, with the formation of urethane.

However, the problem is the frequent occurrence of optical distortions, such as the opacity of the retaining layer, due to incompatibility between such urethane matrix, and radiation-curable monomers.

System containing polyisocyanates, polyols and radiation-curable compounds, such as photochemically stitched reactive diluents, CTD the selected cases are known from the field of coating technology (US 4247578, DE 19709560). Mentioned polyol as one of the components, mainly, are components based on polymeric ethers or polymeric esters, or polyacrylonitrile. Doesn't say anything specific about their compatibility with the composition of the compounds on unsaturated olefinic type, such as reactive diluents based on acrylates.

Brief description of the invention

The aim of the present invention was to develop polyurethane systems that are suitable for the production of preserves layers for holographic storage media and which have satisfactory compatibility of the polyurethane polymer matrix with the composition of the radiation-curable monomers, unsaturated by olefinic type.

It was found that the excellent compatibility of the polymer matrix with unsaturated monomers definitely achieved only in the case when as a building block for polymers of the matrix are applied reacting with isocyanates block copolymers.

The present invention relates to polyurethane systems containing:

A) polyisocyanates,

B) reacting with isocyanates block copolymers,

C) compounds having groups which, under actinic irradiation react with the compounds, unsaturated by ethylene type (radiation from eridania group), with polymerization,

D) optional free radical stabilizers and

E) photoinitiator.

Detailed description of the invention

When used in this text in the description and in the claims, including application examples, and unless otherwise indicated, all numbers can be understood as if they were preceded by the word "about"even if the word is not mentioned explicitly. This also implies that any numerical range, referred to in this text includes all the sub-bands.

In the context of the present invention, the block copolymers are understood as denoting polymeric compounds that consist of two or more blocks, in each case with a polymer chain, which are homogeneous in the sense of monomers and are chemically bonded to each other, preferably linearly.

The polyisocyanates of component A), which can be used are all compounds, basically well known to a qualified specialist in the art, or mixtures thereof, which are, on average, two or more NCO functional groups on the molecule. They can be aromatic, analiticheskoy, aliphatic or cycloaliphatic basis. Monoisocyanates and/or polyisocyanates containing unsaturated groups can also be used as related in some m the Shih quantities.

For example, suitable are butylanisole, hexamethylene-diisocyanate, (HDI), isophoronediisocyanate (IPDI), 1,8-diisocyanato-4-(isocyanatomethyl)octane, 2,2,4 - and/or 2,4,4-trimethylhexamethylenediamine, the isomeric bis(4,4'-isocyanatophenyl)-methanes and mixtures thereof having any desired content of isomers, isocyanatomethyl-1,8-octadienal, 1,4 - cyclohexanediethanol, isomeric cyclohexanedimethanol, 1,4-delete the entry, 2,4 - and/or 2,6-colorvision, 1,5-naphthylenediisocyanate, 2,4'- or 4,4'-diphenylmethanediisocyanate and/or triphenylmethane 4,4',4"-triisocyanate.

It is also possible the use of Monomeric di - or triisocyanate having a urethane, urea, carbodiimide, allodapine, ISO-cyanurate, allophanate, biuret, oxadiazoline, uret-dinavia and/or iminoimidazolidine structure.

Preferred is the use of polyisocyanates based on aliphatic and/or cycloaliphatic di - or triisocyanate.

The polyisocyanates of component A) is particularly preferably represent diarizonae or oligomerization aliphatic and/or cycloaliphatic di - or triisocyanate.

Particularly preferred isocyanurate, uretdione and/or aminooxy-diazinon based on HDI, 1,8-diisocyanato-4-(isocyanatomethyl)octane or mixtures thereof.

Component a)preferably contains, at least 60 wt.% polyisocyanates based on aliphatic and/or cycloaliphatic di - and/or triisocyanate.

NCO groups of the polyisocyanates of component A) can be completely or partially blocked by blocking agents commonly used in the industry. They represent, for example, alcohols, lactams, oximes, esters of malonic acid, alkylacrylate, triazoles, phenols, imidazoles, pyrazoles and amines, such as, for example, butanonoxime, Diisopropylamine, 1,2,4-triazole, dimethyl-1,2,4-triazole, imidazole, diethylmalonate, ethylacetoacetate, acetonates, 3,5-dimethylpyrazole, Epsilon-caprolactam, N-tert-butylbenzylamine, Cyclopentanone-carboxitherapy ether or any desired mixture of these blocking agents.

All hydroxyltoluene block copolymers can be used in component B). They may contain, for example, two or more polymer-ester, polymer-prostofine, polycarbonate, poly(meth)acrylate and/or polyurethane segments located blocks.

Polymer-ester segments can be obtained, for example, from linear polyclonality diols or branched polyclonality polyols obtained in a known manner from aliphatic, cycloaliphatic or aromatic di - or polycarboxylic acids or their anhydrides, and polynuclear alcohols having the N-functionality ≥2.

Examples of such di - or polycarboxylic acids or anhydrides are succinic, glutaric, adipic, Emelyanova, subernova, azelaic, sabotinova, nonindigenous, decanedicarbonitrile, terephthalic, isophthalic, o-phthalic, tetrahydrophtalic, hexahydrophthalic or trimellitate acid or the anhydrides of the acids, such as o-phthalic, trimellitic or succinic anhydride, or any desired mixture with one another.

Examples of suitable alcohols are ethanediol, di-, tri - or tetraethylene glycol, 1,2-propandiol, di-, tri - or tetrapropylene, 1,3-propandiol, 1,4-butanediol, 1,3-butanediol, 2,3-butanediol, 1,5-pentanediol, 1,6-hexanediol, 2,2-dimethyl-1,3-propandiol, 1,4-dihydrocyclopenta, 1,4-dimethylcyclohexane, 1,8-octanediol, 1,10-decanediol, 1,12-dodecanediol, trimethylolpropane, glycerin or any desired mixture with one another.

Polymer-ester segments can be based on natural raw materials such as castor oil. Also polymer-ester segments can be based on Homo - or copolymers of lactones, which preferably can be obtained by reaction of accession of lactones or mixtures of lactones, such as butyrolactone, ε-caprolactone and/or methyl-ε-caprolactone, with hydroxyltoluene compounds, such as polynuclear alcohols having IT functionality is 2, for example, matching the above types, or hydroxyltoluene segments of the polymer.

Polyols based, polymer-ester segments preferably have Srednekanskaya molar mass of from 400 to 4000 g/mol, particularly preferably from 500 to 2000 g/mol. Their IT functionality is preferably from 1.5 to 3.5, particularly preferably from 1.8 to 3.0.

Polycarbonate segments are generally based on polyols, which can be obtained in a known manner by the reaction of organic carbonates or phosgene with dialami or mixtures of diols.

Suitable organic carbonates are dimethyl, diethyl and diphenylcarbonate.

Suitable diols or mixtures of diols include polynuclear alcohols mentioned in relation to polymer-ester segments and with IT the functionality ≥2, preferably 1,4-butanediol, 1,6-hexanediol and/or 3-methyl-1,5-pentanediol.

The polyols are based on polycarbonate segments preferably have Srednekanskaya molar mass of from 400 to 4000 g/mol, particularly preferably from 500 to 2000 g/mol. IT is the functionality of these polyols is preferably from 1.8 to 3.2, particularly preferably from 1.9 to 3.0.

Polymer-prostofine segments are usually based on preducted cyclic ethers with molecules IT - or NH-functional is selected initiators, while these preaddukta not necessarily have a modular structure.

Suitable cyclic ethers are, for example, styrene oxide, ethylene oxide, propylene oxide, tetrahydrofuran, butylenes, epichlorohydrin and any desired mixtures.

Usable initiators are polynuclear alcohols mentioned in relation to polymer-ester segments and with IT the functionality ≥2, and primary or secondary amines and aminoalcohols. Also hydroxyltoluene segments of the polymer can act as initiators for polymer-prostofine block.

Polyols based, polymer-prostofine segments preferably have Srednekanskaya molar mass of from 250 to 10,000 g/mol, particularly preferably from 500 to 4000 g/mol and even more preferably from 600 to 2000 g/mol. IT functionality is preferably from 1.5 to 4.0, particularly preferably from 1.8 to 3.0.

Block copolymers are usually synthesized from di - or polyhydroxybenzenes connection of the type described for the above-mentioned segments, with which the other blocks react polyaddition or polycondensation. Depending on IT's functionality and the number of subsequent stages chunked connection or condensation, get two-, three -, Tetra - or multiblock the e copolymers.

The synthesis is usually carried out on the basis of based on polycarbonate, polymer simple or polymeric ether ether complex dihydroxyphenylalanine compounds of this type, as described above for these segments, which in response chunked accession impose lactones, such as butyrolactone, ε-caprolactone, methyl-ε-caprolactone, γ-phenyl-ε-caprolactam or ε-decanolactone. Thus forming a linear three - or multiblock copolymers, for example, having a composition of poly(lactone)-block-poly(carbonate)-block-poly(lactone), or poly(lactone)-block-poly(simple ether)-block-poly(lactone), or poly(lactone)-block-poly(ester)-block-poly(lactone) with terminal hydro-cellname groups.

Particularly preferably, the basis for the block copolymers of the present invention is disfunctionally simple polymer ester, which reacts chunked accession impose lactones such a way that the result is the formation of linear poly(lactone)-block-poly(simple ether)-block-poly(lactone)polyol with terminal hydroxyl groups.

Internal polyproteins segment preferably based on ethylene oxide, propylene oxide or tetrahydrofuran, particularly preferably tetrahydrofuran. It preferably has srednecenovogo the molar mass of from 250 g/mol to 2000 g/mol, prepact the tion from 500 to 1500 g/mol, particularly preferably from 600 to 1100 g/mol.

Preferably, lactonase blocks based on ε-caprolactone, and in each case preferably have srednecenovogo the molar weight of 114 g/mol to 1500 g/mol, particularly preferably from 114 to 1000 g/mol, and even more preferably from 114 to 700 g/mol.

Particularly preferred block copolymers are linear poly(ε-caprolactone)-block-poly(tetrahydrofuran)-block-poly(ε-caprolactone)polyols having terminal hydroxyl groups and srednecenovogo the molar mass of from 500 g/mol to 5000 g/mol, preferably from 600 to 4000 g/mol, particularly preferably from 700 to 3000 g/mol, with an average mass fraction of poly(tertrahydrofuran ring) block, based on srednetsenovoj block copolymer is from 0.2 to 0.9, preferably from 0.4 to 0.8, particularly preferably from 0.5 to 0.7, and the average mass fraction of the two poly(ε-caprolactone) blocks, based on srednetsenovoj block copolymer is from 0.1 to 0.8, preferably from 0.2 to 0.5, and particularly preferably from 0.3 to 0.4.

The block copolymers of the present invention receives, for example, the introduction of the next block in response accession or condensation with, preferably, dihydroxyphenylalanine polyol as one unit in the manner described above. If Viktorovich blocks add suitable lactones and approach is ASCII catalyst for polymerization. Suitable catalysts are all suitable for esterification, such as, for example, octanoate tin, tin chloride and p-toluensulfonate acid. In this case, the catalyst is used in concentrations from 50 to 1000 frequent. per million, preferably from 100 to 800 frequent. per million, particularly preferably from 150 to 500 frequent. in million

Polyprionidae carried out at temperatures from 90 to 260°C, preferably from 100 to 180°C. depending on the system the duration of the reaction is from 1 to 15 h, preferably from 2 to 10 hours, the reaction periodically monitor, determining the solids content, i.e. non-volatile fractions, and the polymerization finish when reaching solids 95 wt.%, preferably 99.5 wt.%, by cooling to room temperature.

In addition to the need for the present invention block copolymers and their mixtures in polyurethane systems according to the present invention may also be additional polyols. They preferably represent poly(propyleneoxide), polyethyleneoxide-polypropyleneoxide and/or poly(tetrahydrofuran), HE has a functionality of from 2 to 4 and srednecenovogo the molar mass of from 250 to 5000 g/mol, preferably from 400 to 3000 g/mol and particularly preferably from 500 to 2000 g/mol.

In the case of the use of the share block copolymers ranges from 1 to d is 100 wt.%, preferably from 20 to 100 wt.%, particularly preferably from 60 to 100 wt.%, based on the sum of the amounts of component b) and an additional polyols.

In the component (C) can be used derivatives of α,β-unsaturated carboxylic acids, such as acrylates, maleate, fumarate, maleimide, acrylamide, and also vinyl ethers, propylene ethers, allyl ethers and compounds containing di-cyclopentadiene fragments and compounds on unsaturated olefinic type, such as styrene, α-methylsterols, vinyltoluene, vinylcarbazole, olefins, such as, for example, 1-octene and/or 1-mission, vinyl esters, such as, for example, ®VeoVa 9 and/or ®VeoVa 10 from Shell, (meth)Acrylonitrile, (meth)acrylamide, methacrylic acid, acrylic acid and any desired mixture. The acrylates and methacrylates are preferred, and acrylates are particularly preferred.

Esters of acrylic acid or methacrylic acid are generally referred to as acrylates or methacrylates. Examples of acrylates and methacrylates that can be used are methyl acrylate, methyl methacrylate, acrylate, methacrylate, ethoxyethylacetate, ethoxyethylacetate, n-butyl acrylate, n-butylmethacrylate, tert-butyl acrylate, tert-butylmethacrylate, hexidecimal, hexyllithium, 2-hexyl acrylate, 2-ethylhexylacrylate, butoxyethyl the lat, biotoxicological, laurelcrest, laurenmarie, isobutylacetate, isobornylacrylat, phenylacrylate, fenilsalicilat, p-chloraniline, p-chlorophenylalanine, p-bromophenylacetate, p-bromophenylacetate, trichlorophenylacetic, trichlorophenylacetic, tribromaniline, tribromomethane, pentachloroaniline, pentachlorophenolate, pentabromophenyl, pentabromodiphenylether, pentabromobenzyl, pentabromoethylbenzene, phenoxyethylacrylate, phenoxyethylacrylate, peroxyacetylnitrate, peroxyacetylnitrate, 2-naphthylacetate, 2-naphthylmethyl, 1,4-bis-(2-Tinetti)-2-butyl acrylate, 4-bis-(2-Tinetti)-2-butylmethacrylate, bisphenol diacrylate, bisphenol dimethacrylate, tetrabromobisphenol And diacrylate, tetrabromobisphenol And dimethacrylate, 2,2,2-cryptomaterial, 2,2,2-cryptarithmetic, 1,1,1,3,3,3-hexafluoroisopropylidene, 1,1,1,3,3,3-hexafluoroisopropylidene, 2,2,3,3,3-pentafluoropropyl, and/or 2,2,3,3,3-pentafluoropropyl.

Epoxyacrylate, also suitable for use as component (C), can be obtained as the reaction products diglycidylether ether of bisphenol a with hydroxyalkyl(meth)acrylate and carboxylic acids, with diglycidyl ether of bisphenol a first interacts with hydroxyalkyl(meth)acrylate with acid catalysis L is wise, and hydroxypentanal the product of this reaction then atrificial carboxylic acid by a method known to a qualified specialist in this field. Himself diglycidyl ether of bisphenol a and brominated options, such as, for example, diglycidyl ether tetrabromobisphenol And (from Dow Chemical, D.E.R. 542), can be used as diepoxide, providing the advantage. All of the above hydroxyl-functional acrylates can be used as hydroxyalkyl(meth)acrylates, in particular 2-hydroxyethylacrylate, hydroxypropylmethacrylate, 4-hydroxyethylacrylate, poly(ε-caprolactone) mono(meth)acrylates and poly(ethylene glycol) mono(meth)acrylates. In principle, all of monofunctional carboxylic acids can be used as carboxylic acids, in particular acid with aromatic substituents. Propane-2,2-diylbis[(2,6-dibromo-4,1-phenylene)oxy(2-{[3,3,3-Tris(4-chlorophenyl)propanol]oxy}propane-3,1-diyl)oxetan-2.1-diyl]diacrylate has established itself as the preferred connection from the specified class epoxyacrylate.

Vinylaromatic compounds, suitable for a component, are styrene, halogenated derivatives of styrene, such as, for example, 2-chloresterol, 3-chloresterol, 4-chloresterol, 2-Postira, 3-Postira, 4-Postira, p-(chloromethyl)styrene, p-(methyl bromide)styrene or 1-vinylnaphthalene, 2-vinylnaphthalene, 2-vinylanthracene, N-vinyl pyrrolidone, 9-vinylanthracene, 9-vinylcarbazole or difunctional compounds such as divinylbenzene. Can also be applied vinyl ethers, such as, for example, butylvinyl ether.

The preferred compounds for component are 9-vinylcarbazole, vinylnaphthalene, diacrylate bisphenol a, diacrylate of tetrabromobisphenol And 1,4-bis-(2-Tinetti)-2-butyl acrylate, pentabromophenyl, naphthylacetate and propane-2,2-diylbis[(2,6-dibromo-4,1-phenylene)oxy(2-{[3,3,3-Tris(4-chlorophenyl)propanol]-oxy}propane-3,1-diyl)oxetan-2.1-diyl]diacrylate.

As component D) used one or more free radical stabilizers. Suitable inhibitors and antioxidants, as described in "Methods der organischen Chemie [Methods of Organic Chemistry]" (Houben-Weyl), 4th edition, volume XIV/1, str and forth, Georg Thieme Verlag, Stuttgart 1961. Suitable classes of compounds are, for example, phenols, such as 2,6-di-tert-butyl-4-METHYLPHENOL, Cresols, hydrochinone, benzyl alcohols, such as benzhydrol, optional also quinones, such as, for example, 2,5-di-tert-butylkine, optionally also aromatic amines, such as diiso-Propylamine or phenothiazines. Preferred free radical stabilizers are 2,6-di-tert-butyl-4-METHYLPHENOL, phenothiazines and benzhydrol.

One or more photoinitiators approx shall apply as component E). They are usually photoinitiator that can be activated actinic radiation to initiate free radical polymerization of the corresponding able to cure groups. Photoinitiator are known commercially available compounds, there are monomolecular (type I) and bimolecular (type II) initiators. System (type I) are, for example, aromatic ketones such as benzophenone, in combination with tertiary amines, alkylbenzene, 4,4'-bis(dimethylamino)benzophenone (michler ketone), Andron and halogenated benzophenone or a mixture of these types. In addition, can be used initiators (type II), such as benzoin and its derivatives, benzylacetone, allfashion oxides, for example 2,4,6-trimethylbenzenesulfonyl oxide, bisalloy oxides, esters phenylglyoxylic acid, comparison, α-aminoacetophenone, α,α-dialkoxybenzene, 1-[4-(phenylthio)phenyl]Oxton-1,2-dione-2-(O-benzoyloxy) and α-hydroxyacetophenone. As photoinitiator can be used photoinitiated system described in EP-A 0223587 and consisting of a mixture of arboreta ammonium and one or more dyes. For example, triphenylsilanol tetrabutylammonium, Tris-(3-forfinal)exibart and tetrabutylammonium Tris-(3-chloro-4-were)exibart tetrabutylammonium is zgodny as arboreta ammonium. Suitable dyes are, for example, new methylene blue, thionin, Basic Yellow, pinacyanol chloride, rhodamine 6G, gallocyanine, ethyl violet, Victoria blue R, Celestine blue, hyalinosis red, crystal violet, brilliant green, Astrazon Orange G, Darrow Red, pyronin Y, Basic Red 29, pyrillium I, cyanin, methylene blue and Azur A.

Advantages can provide the use of mixtures of the above compounds. Depending on the radiation source used for curing, the type and concentration need to be adapted to photoinitiator known qualified way. Further details are described, for example, in RCT Oldring (Ed.), Chemistry &Technology of UV &EB Formulations For Coatings, Inks &Paints, vol.3, 1991, SITA Technology, London, p.61-328.

The preferred photoinitiators are 2,4,6-trimethylbenzenesulfonyl oxide, 1-[4-(phenylthio)phenyl]Oxton-1,2-dione-2-(O-benzoyloxy) and a mixture of Tris-(3-forfinal)exelberth tetrabutylammonium, Tris-(3-chloro-4-were)exelberth tetrabutylammonium with dyes, such as, for example, methylene blue, new methylene blue, azure A, pyrillium I, cyanin, gallocyanine, brilliant green, crystal violet and thionin.

In addition, the polyurethane systems of the present invention may use one or more catalysts. They predpochtitel is but catalyze the formation of urethane. For this purpose, preferably suitable amines and metal compounds of tin, zinc, iron, bismuth, molybdenum, cobalt, calcium, magnesium and zirconium. Particularly preferred octanoate tin, octanoate zinc, dilaurate dibutylamine, in primary forms dimethylurea, acetylacetonate iron (III)chloride iron (II), zinc chloride, of tetraalkylammonium hydroxides, hydroxides of alkali metals, alkali metal alcoholate, alkali metal salts with long chain fatty acids having 10 to 20 carbon atoms and optional lateral Oh groups, octanoate lead or tertiary amines, such as triethylamine, tributylamine, dimethylbenzylamine, dicyclohexylmethane, dimethylcyclohexylamine, N,N,N',N'-tetramethylethylenediamine ether, bis(dimethylaminopropyl)urea, N-methyl - or N-ethylmorpholine, N,N'-disorganizational ether (DMDEE), N-cyclohexylaniline, M,N,N',N'-tetramethylethylenediamine, N,N,N',N'-tetramethylbutylamine, N,N,N',N'-tetramethyl-1,6-hexanediamine, pentamethyldiethylenetriamine, dimethylpiperazine, N-dimethylaminopyridine, 1,2-dimethylimidazole, N-hydroxypropylamino, 1-azabicyclo[2.2.0]octane, 1,4-diazabicyclo[2.2.2]octane (Dabco) or alkanolamine connection such as triethanolamine, triisopropanolamine, N-methyl - and N-ethyldiethanolamine, dimethylaminoethanol, 2-(N,N-dimethylaminoethoxy)ethanol or N-Tris(dialkylaminoalkyl)is hexahydrotriazine, for example N,N',N-Tris(dimethylaminopropyl)-s-hexahydrotriazine, diazabicyclo, diazabicyclo, 1,1,3,3-tetramethylguanidine, 1,3,4,6,7,8-hexahydro-1-methyl-2H-pyrimido(1,2-a)pyrimidine.

Especially preferred catalysts are dilaurate dibutylamine, in primary forms dimethylurea, acetylacetonate Fe (III), 1,4-diazabicyclo[2.2.2]octane, diazabicyclo, diazabicyclo, 1,1,3,3-tetramethylguanidine and 1,3,4,6,7,8-hexahydro-1-methyl-2H-pyrimido(1,2-a)pyrimidine.

In addition, the polyurethane systems of the present invention may also contain various additives and supplements. These are, for example, solvents, plasticizers, leveling tools, defoamers or amplifiers adhesion, as well as polyurethanes, thermoplastic polymers, oligomers, and other compounds having functional groups such as, for example, acetals, epoxides, oxetane, oxazoline, dioxolane, and/or hydrophilic groups, such as, for example, salts and/or oxides.

Preferably used solvents are volatile solvent having good compatibility with 2-component prepared according to the present invention, such as ethyl acetate, butyl acetate or acetone.

As plasticizers are preferably used liquids having good solvent SV is Ista, low volatility and high boiling point; they may, for example, diisobutylamine, di-n-butylacetat, dibutyl phthalate, non-hydroxyquinoline polymeric ethers, such as, for example, dimethyl ether of polyethylene glycol having srednecenovogo the molar mass of from 250 g/mol to 2000 g/mol or propylene glycol and mixtures of these compounds.

Can also provide the advantage of simultaneous use of several additives of the same type. Of course, may also provide the advantage of using multiple additives of various types.

The mixture of components B) to E) and optional catalysts and auxiliaries and additives typically consists of

24,999-99,899 wt.% component)

0.1 to 75 wt.% component (C)

0-3 wt.% component (D)

of 0.001-5 wt.% component (E)

0-4 wt.% catalysts

0-50 wt.% auxiliary agents and additives.

The mixture preferably consists of

86.998-97.998 wt.% component)

2-13 wt.% component (C)

of 0.001-1 wt.% component (D)

of 0.001-1 wt.% component (E)

0-2 wt.% catalysts

0-15 wt.% auxiliary agents and additives.

The mixture also preferably consists of

44,8-of 87.8 wt.% component)

12.5 to 55 wt.% component (C)

0.1 to 3 wt.% component (D)

0.1 to 3 wt.% component (E)

0-3 wt.% catalysts

0-50 wt.% auxiliary agents and additives.

p> The molar ratio of NCO to IT typically ranges from 0.5 to 2.0, preferably from 0.90 to 1.25.

Polyurethane system according to the present invention are usually obtained by the method, according to which, first, all components, except for the polyisocyanates A)are mixed with each other. This can be achieved by all means and using any equipment known to the skilled specialist in the field of mixing technology, such as, for example, devices with mixers or dynamic and static mixers. The temperature during this procedure ranges from 0 to 100°C., preferably from 10 to 80°C., particularly preferably from 20 to 60°C. the resulting mixture can immediately be processed further or stored in the stable storage intermediate substance, not necessarily in a few months.

If necessary, you can also carry out degassing in the vacuum level, for example, 1 mbar.

Then shortly before use perform the mixing with the polyisocyanate component a), in this case, you may also use traditional technology mix. However, the preferred apparatus without dead volume or with a small dead volume. In addition, the preferred ways in which the mixing is performed in a very short period of time and at a very intense PE is emisiuni two blend components. Particularly suitable for this purpose, dynamic mixers, in particular those in which components a) and B) to E) for the first time in contact with each other in the mixer. This mixing can be carried out at temperatures from 0 to 80°C, preferably from 5 to 50°C., particularly preferably from 10 to 40°C. a Mixture of two components a and b can be optionally degassing after mixing in the vacuum of, for example, 1 mbar, to remove residual gases and to prevent the formation of bubbles in the polymer layer. Mixing gives a clear liquid ready-made form, which, depending on the composition hardens over a period of time from several seconds to several hours at room temperature.

Polyurethane system according to the present invention is preferably adjusted so that the solidification at room temperature began during the period of time from several minutes to one hour. In a preferred embodiment, the solidification speed up the heating of the finished form after mixing to temperatures between 30 and 180°C, preferably from 40 to 120°C., particularly preferably from 50 to 100°C.

Immediately after mixing all of the components of the polyurethane system according to the present invention have a viscosity at room temperature, in a typical case, from 10 to 100,000 MPa·s, main is compulsory from 100 to 20,000 MPa·s, particularly preferably from 500 to 10,000 MPa·s, so they had good properties for processing even in the absence of solvent. In a solution of suitable solvents can be installed viscosity less than 10,000 MPa·s, preferably less than 2000 MPa·s, particularly preferably less than 500 MPa·S.

The present invention also relates to polymers which can be obtained from the polyurethane systems of the present invention.

They preferably have a glass transition temperature below -10°C, preferably below -25°C. and particularly preferably below -40°C.

According to a preferred method of the finished form of the invention is applied immediately after mixing the substrate, it is possible to apply all the traditional ways known to the skilled specialist in the field of coating technology; in particular, the coating can be applied knife device, filling, printing, screen printing, spraying or inkjet printer.

The substrate can be plastic, metal, wood, paper, glass, ceramics and composite materials containing several of these materials, in the preferred embodiment, the substrate has the shape of a leaf.

In a preferred embodiment, the coated substrate prepared composition is carried out in a continuous process. the AK rule, the finished composition of the present invention is applied to the substrate in the form of a film having a thickness of from 5 mm to 1 μm, preferably from 500 μm to 5 μm, particularly preferably from 50 μm to 8 μm and even more preferably from 25 μm to 10 μm.

In the case where the substrate is a sheet, thereby obtaining a flexible sheets coated with a coating, which in the case of a continuous process can be minimized after hardening and stored in this form for several months.

In a more preferred embodiment, the prepared composition is applied in such a way that it is on both sides covered with transparent substrates, in particular plastic or glass, and for this purpose the finished form is poured between the substrates held at a certain distance from each other, comprising from 1 to 2 mm, preferably from 1.2 to 1.8 mm, particularly preferably from 1.4 to 1.6 mm, in particular 1.5 mm, and the substrates held at a certain distance from each other until the complete hardening and loss of fluidity of the finished composition.

The materials used as the substrate, can, of course, to have multiple layers. The substrates may consist of several layers of different materials and can have, for example, coating with additional properties such as improved adhesion, enhanced hydrophobic or hydro is safe properties, increased resistance to scratching, antireflection properties in certain wavelength ranges, improved surface finish, etc.

The materials, received by one of the above methods, can then be used for recording holograms. For this purpose, two beams of light are forced to interfere in the material according to the method known to the skilled specialist in the field of holography (.Hariharan, Optical : Holography 2nd Edition, Cambridge University Press, 1996), thus to form a hologram. Irradiation of the hologram can be done both continuous and pulsed irradiation. Optional you can also create more than one hologram exposure to the same material at the same point, use may be made of, for example, multiplex method known to the skilled specialist in the field of holography. After irradiation of the hologram material can also optionally be irradiated with a strong light source with a wide range of frequencies, and the hologram is then used without further necessary processing stages. The hologram can also then be further processed during the further stages of processing, such as transferring to another surface, deformation, then fusing, bonding to another surface or coating, scratch coating.

Holograms are obtained by one opican the x ways, can be used to store data to playback images, which serve, for example, for three-dimensional playback of people or objects or to authenticate a person or object, to produce an optical element having the function of lenses, mirrors, filters, diffusing screen, the refractive element, the optical waveguide and/or template.

Thus, the present invention relates, furthermore, to the use of polyurethane systems according to the present invention in the production of holographic media and the holographic media as such.

EXAMPLES

The solids content was determined in each case in the following way.

About 1 g of sample is accurately weighed in an aluminum Cup, the weight of which is precisely determined in advance. Then were dried at 140°C on the scales for drying to constant weight of the sample. After that weighed aluminum Cup and a calculated solids content as a factor, equal to the mass of the substance before drying, divided by the mass of the material after drying.

The block copolymer And:

0.10 g of octanoate tin, 64,56 g ε-caprolactone and 135,34 g trifunctional polypropyleneoxide polyproteins polyol (equivalent weight of 239 g/mol OH) were placed in a flask with a volume of 250 ml and heated to 150°C and kept at this temperature until the solids (Dol the non-volatile components) of 99.5 wt.% or higher. Then there was the cooling and received the product in the form of a viscous liquid.

The block copolymer In:

0.25 g octanoate tin, 172,29 g ε-caprolactone and 327,46 g defunctioning polytetrahydrofuran polyproteins polyol (equivalent weight of 325 g/mol OH) were placed in a flask with a volume of 1 liter and heated to 120°C and kept at this temperature until the solids (the share of non-volatile components) of 99.5 wt.% or higher. Then there was the cooling and received the product in the form of a viscous liquid.

The block copolymer With:

0.18 g of octanoate tin, 374,81 g ε-caprolactone and 374,81 g defunctioning polytetrahydrofuran polyproteins polyol (equivalent weight 500 g/mol OH) were placed in a flask with a volume of 1 liter and heated to 120°C and kept at this temperature until the solids (the share of non-volatile components) of 99.5 wt.% or higher. Then there was the cooling and received this product as a waxy solid.

The block copolymer D:

0,37 g octanoate tin, 428,14 g ε-caprolactone and 321,48 g difunctional poly-ester polyol (consisting of adipic acid, 1,4-butanediol, 1,6-hexanediol and neopentyl glycol, the equivalent weight 214 g/mol OH) were placed in a flask with a volume of 1 liter and heated to 150°C and kept at this temperature until the solids (the share of non-volatile components is) of 99.5 wt.% or higher. Then there was the cooling and received the product in the form of a viscous liquid.

The block copolymer E:

0,249 g octanoate tin, 325 g of ε-caprolactone and 374,81 g defunctioning polytetrahydrofuran poly-prostofine polyol (equivalent weight of 325 g/mol) and 172,2 g of γ-butyrolactone were placed in a three-neck flask with a volume of 1 liter and heated to 160°C and stirred at this temperature for approximately 60 hours the Remainder of γ-butyrolactone drove at 90°C and a pressure of 0.1 mbar. The obtained block copolymer does not contain Monomeric γ-butyrolactone and HE has a number of 162,5.

Polyurethane finish composition:

Reacting with the isocyanate component was prepared from 6,159 g of the block copolymer And, 0,500 g benzylmethylamine, 0.015 g Darocure TPO (product of Ciba Specialty Chemicals) and 0,050 g benzhydrol by stirring this mixture at 50°C to obtain a clear solution. Applied isocyanate component consisted of a polyisocyanate obtained from exanguination with a high content of uretdione (Desmodur N3400, commercial product of Bayer MaterialScience AG, NCO content: 21,6%).

Polyurethane finish composition:

Reacting with the isocyanate component was prepared from 7,446 g of the block copolymer And, 0,493 g of 1,4-bis(Tinetti)-2-butyl acrylate, 0.037 g Irgacure OXE 01 (product of Ciba Specialty Chemicals) and 0.025 g of 2,6-di-tert-butyl-4-METHYLPHENOL by stirring this mixture at 50°C to obtain a clear solution. Applied from ianity component consisted of a polyisocyanate, obtained from exanguination with a high content of oxadiazoline (Desmodur VP LS 2294, experimental product of Bayer MaterialScience AG, NCO content: 23,2%).

Polyurethane finish composition:

Reacting with the isocyanate component was prepared from 9,049 g block copolymer, 0,660 g propane-2,2-diylbis[(2,6-dibromo-4,1-phenylene)oxy(2-{[3,3,3-Tris(4-chlorophenyl)propanol]oxy}propane-3,1-diyl)oxetan-2.1-diyl]diacrylate, was 0.026 g of Darocure TPO (product of Ciba Specialty Chemicals), 0,079 g benzhydrol and 0,396 g of dibutyl phthalate by stirring this mixture at 50°C to obtain a clear solution. Applied isocyanate component consisted of a polyisocyanate obtained from exanguination with a high content of oxadiazoline (Desmodur XP 2410, an experimental product of Bayer MaterialScience AG, NCO content: 23.5 per cent).

Polyurethane finish composition D:

Reacting with the isocyanate component was prepared from 8,015 g of block copolymer With HDI, 0.800 g of propane-2,2-diylbis[(2,6-dibromo-4,1-phenylene)oxy(2-{[3,3,3-Tris(4-chlorophenyl)-propanol]oxy}propane-3,1-diyl)oxetan-2.1-diyl]diacrylate, 0.015 g Darocure TPO (product of Ciba Specialty Chemicals) and 0,050 g benzhydrol by stirring this mixture at 50°C to obtain a clear solution. Applied isocyanate component consisted of a polyisocyanate obtained from exanguination with a high content of oxadiazoline (Desmodur XP 2410, an experimental product of Bayer MaterialScienc AG, the NCO content: 23.5 per cent).

Polyurethane finished the composition of the E:

Reacting with the isocyanate component was prepared from 6,650 g of block copolymer D, 0.800 to g propane-2,2-diylbis[(2,6-dibromo-4,1-phenylene)oxy(2-{[3,3,3-Tris(4-chlorophenyl)-propanol]oxy}propane-3,1-diyl)oxetan-2.1-diyl]diacrylate, 0.015 g Darocure TPO (product of Ciba Specialty Chemicals) and 0,050 g benzhydrol by stirring this mixture at 50°C to obtain a clear solution. Applied isocyanate component consisted of a polyisocyanate obtained from exanguination with a high content of oxadiazoline (Desmodur XP 2410, an experimental product of Bayer MaterialScience AG, NCO content: 23.5 per cent).

Polyurethane finish composition F:

Reacting with the isocyanate component was prepared from 6,201 g of block copolymer E, 0,500 g propane-2,2-diylbis[(2,6-dibromo-4,1-phenylene)oxy(2-{[3,3,3-Tris(4-chlorophenyl)-propanol]oxy}propane-3,1-diyl)oxetan-2.1-diyl]diacrylate, 0,020 g Darocure TPO (product of Ciba Specialty Chemicals) and to 0.060 g benzhydrol by stirring the mixture at 60°C. Then was added 0,300 g of dibutyl phthalate. Applied isocyanate component consisted of a polyisocyanate obtained from exanguination with a high content of oxadiazoline (Desmodur XP 2410, an experimental product of Bayer MaterialScience AG, NCO content: 23.5 per cent).

Comparative example: Polyurethane finish composition G:

Reacting with the isocyanate component was prepared from 13,955 g line of the CSOs difunctional poly(tetrahydrofuran) (Terathane 650, the product of Invista, 325 g/mol), 0,929 g of 1,4-bis(Tinetti)-2-butyl acrylate, 0,070 g Irgacure OXE 01 (product of Ciba Specialty Chemicals) and 0.046 g of 2,6-di-tert-butyl-4-METHYLPHENOL by stirring this mixture at 50°C to obtain a clear solution. Applied isocyanate component consisted of a polyisocyanate obtained from exanguination with a high content of oxadiazoline (Desmodur XP 2410, an experimental product of Bayer MaterialScience AG, NCO content: 23.5%).

Test samples were obtained from polyurethane finished compositions listed in the table, by mixing the isocyanate component and reacting with the isocyanate component in a specified ratio with the addition of a specified number of in primary forms dimethylurea (Fomrez UL 28, a product of GE Silicones) as catalyst for the formation of urethane.

Polyurethane systemIsocyanateReacting with the isocyanate componentCatalyst
And3,276 g6,734 g0.004 g
In3,504 g6,493 g0.003 g
2,88 g 10,212 g0.005 g
D1,294 g8,705 g0.004 g
E2,484 g7,515 g0.004 g
F7,081 g2,918 g0.004 g
G5,305 g9,691 g0.005 g

Corresponding to the finished composition is then applied onto a glass plate and covered with a second glass plate, with spacers kept the two glass plates at a desired distance from each other (for example, 250 μm), and the mixture is completely moistened, the two inner surfaces of the glass plates. For curing, the thus prepared samples were first passed 30 min at room temperature and then left to harden for 2 hours at a temperature of from 50°C. to 60°C. the Optical transparency was evaluated at the beginning of solidification at room temperature, after 30 minutes of curing at room temperature and after 2 hours of accelerated curing at 50°C. Assess the and was based on the following scale:

1 = transparent

2 = slightly turbid

3 = completely opaque

For examples of finished compositions were obtained the following values.

Polyurethane finish compositionStartAfter 30 minutes of curing at room temperatureAfter 2 hours of accelerated curing
And221
In221
211
D211
E221
F111
G331

For further testing of optical fiber is ski properties of the investigated samples of finished formulations And, B, E and F were then irradiated at points, causing two light beams (λ=405 nm) to interfere in the samples. The appearance of the sample is then evaluated according to the following classification:

1 = Exposed area can be discerned with the naked eye only with great difficulty after studying for some time.

2 = Exposed area can immediately easy to see with the naked eye.

3 = exposed area has been intensively muddy spot.

The finished compositionThe assessment of the area exposed
And1
In1
E1
F1
GFrom 2 to 3

It was found that 2-component ready-made compositions A-F of the present invention have a significantly higher transparency than that of comparative example G, for all evaluated criteria.

1. Polyurethane compositions for the production of holographic media containing
A) one or more polyisocyanates,
B) one or b is more reactive with isocyanate block copolymers,
C) one or more compounds having a group which, under actinic irradiation react with the compounds, unsaturated by ethylene type, with polymerization,
D) optionally one or more free-radical stabilizers and
E) one or more photoinitiators.

2. Polyurethane composition according to claim 1, in which at least 60 wt.% MDI component (A) based on aliphatic and/or cycloaliphatic di - and/or triisocyanate.

3. Polyurethane composition according to claim 2, in which the polyisocyanates of component A) are oligomers of aliphatic and/or cycloaliphatic di - or triisocyanate.

4. Polyurethane composition according to claim 1, in which the copolymers used in)contain complex polyester, simple polyester, polycarbonate, poly(meth)acrylate and/or polyurethane segments located blocks.

5. Polyurethane composition according to claim 1, in which the copolymers used in B), are based as an internal unit based on polycarbonates, simple polyesters or complex polyesters dihydroxyphenylalanine compounds, hydroxyl group which is introduced into the reaction block join lactones with getting three or multiblock copolymers.

6. Polyurethane composition according to claim 5, in which dihydroxyphenylalanine connection is the quality of the indoor unit are based on simple polyester diols, based on ethylene oxide, propylene oxide and/or tetrahydrofuran.

7. Polyurethane composition according to claim 5, in which the lactones used butyrolactone, ε-caprolactone, methyl-ε-caprolactone, γ-phenyl-ε-caprolactone, ε-decanolactone or mixtures thereof.

8. Polyurethane composition according to claim 5, in which the inner polyproteins block has srednecenovogo the molar mass of from 250 g/mol to 2000 g/mol.

9. Polyurethane composition according to claim 5, in which the lactone ring units based on ε-caprolactone, and each has srednecenovogo the molar weight of 114 g/mol to 700 g/mol.

10. Polyurethane composition according to claim 1, in which the linear poly(ε-caprolactone)-block-poly(tetrahydrofuran)-block-poly(ε-caprolactone)polyols having terminal hydroxyl groups and srednecenovogo the molar mass of from 500 g/mol to 5000 g/mol, present in In) as block copolymers, while the average mass fraction of poly(tertrahydrofuran ring) block based on srednetsenovoj block copolymer is from 0.2 to 0.9, and the average mass fraction of the two poly(ε-caprolactone)blocks based on block srednetsenovoj the copolymer is from 0.1 to 0.8.

11. Polyurethane composition according to claim 1, in which the molar ratio of NCO groups to the groups is from 0.90 to 1.25.

12. Polyurethane composition according to claim 1, in which one or more compounds from the group consisting of 9-Vignes is carbazole, vinylnaphthalene, diacrylate bisphenol a, diacrylate of tetrabromobisphenol And 1,4-bis(2-Tinetti)-2-butyl acrylate, pentabromodiphenylether, naphthylacetate and propane-2,2-diylbis[(2,6-di-bromo-4,1-phenylene)oxy(2-{[3,3,3-Tris(4-chlorophenyl)propanol]oxy}propane-3,1-diyl)oxetan-2.1-diyl]diacrylate, used in C).

13. Holographic environment, obtained from the polyurethane compositions according to claim 1.



 

Same patents:

FIELD: physics.

SUBSTANCE: modulation method for a plurality of pixel regions of the electro-optical layer of a recording light shutter during each of a plurality of successive frames involves modulation of a set of pixel data bits through first and second pulse width intervals in a frame. The first and second pulse width intervals, as well as neighbouring pulse intervals of successive frames, are separated from each other by an interval where there are no pulses, which is at least equal to the response time of the electro-optical layer and during which there is no bit modulation.

EFFECT: easy error compensation, smaller memory size and required data transmission speed.

32 cl, 7 dwg

FIELD: physics, computer engineering.

SUBSTANCE: present invention relates to computer engineering and can be used during the creation of data storage medium and information-processing device based on a photon echo. The photon echo-processor with laser cooling contains a pumping source of the photon echo impulses and radiation source of pumping the anti-Stokes cooling, optically connected with the solid-state data carrier. The solid-state data carrier is made from material, which contains the excitation centres of the photon echo on ions of one of the rare-earth elements, for example trivalent thulium, and centres of anti-Stokes cooling on the ions of another rare-earth element, which are evenly distributed in the material of the solid-state data carrier. The solid-state data carrier can be made in the form of a light-guide fiber, whose core is made from material, containing excitation centres of the photon echo, and the cladding is made from material, containing centers of anti-Stokes cooling. Due to the uniformity of distribution of the centres of anti-Stoke cooling there is evenness of the cooling temperature of excitation centers of the photon echo on the whole of the solid-state data carrier, which provides for the elimination of errors during information processing in the echo-processor.

EFFECT: elimination of errors during information processing in the echo-processor.

3 cl, 2 dwg

The invention relates to optical data storage devices

The invention relates to computing

Media // 2001450
The invention relates to a device information processing

The invention relates to three-dimensional holography, polymer recording environments and can be used to create systems storing, processing and transmitting information, holographic optical elements

The invention relates to the field of recording information on the basis of the polymerization reaction, namely holographic recording

The invention relates to three-dimensional holography, more specifically to a recording media for holography, and can be used to create a volume holographic recording media, working on various physico-chemical mechanisms for production on the basis of the holographic optical elements of the spectral selectors, multiplexers, other, requiring for its purpose the absence of side-peaks in the pattern and the contour of the spectral selectivity of the functions of the selective response

FIELD: chemistry.

SUBSTANCE: adhesive polyurethane composition consists of a prime coat and polyurethane adhesive, comprising urethane rubber and ethyl acetate, applied on its surface. The prime coat consists of a solution of polyurethane thermoplastic elastomer with ethyl acetate in ratio: polyurethane thermoplastic elastomer 10-18 wt % and ethyl acetate - the balance. The polyurethane adhesive contains a solution of polyurethane thermoplastic elastomer and a mixture of polar organic solvents consisting of ethyl acetate and methylene chloride, with the following ratio of components: polyurethane thermoplastic elastomer 17-27 wt %; methylene chloride 7-10 wt % and ethyl acetate - the balance. The polyurethane adhesive can contain perchlorovinyl resin as a target additive in amount of 0-10% to the total weight of the adhesive.

EFFECT: low cost and improved adhesion properties of the adhesive composition and cohesion strength characteristics of the adhesive joints.

2 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: composition contains the following in pts.wt: 100 bifunctional prepolymer with terminal isocyanate groups, 10.6-12.8 - 3,3'-dichloro-4,4'-diaminodiphenylmethane, 15.9-19.2 dioctylsebacate, 1.2-1.4 - 1,4-butanediol, 0.31-0.35 - para-phenylenediamine and 0.015-0.030 - Agidol 51,52,53 (mixture of 2-dimethylaminomethylphenol, 4-dimethylaminophenol, 2,6-bis (dimethylaminomethyl)phenol, 2,4-bis-(dimethylaminomethyl)phenol,2,4,6-tris-dimethylaminomethyl)phenol.

EFFECT: obtaining a fixing composition which, after prolonged storage, retains strength and adhesion parameters vital for operation of charges of antitank grenades at both high and low temperatures, and also prevents accidental exposure to substances which are harmful to health of personnel, in cases of technical faults and emergencies.

3 tbl

FIELD: chemistry.

SUBSTANCE: magnetodielectric material contains a polyurethane prepolymer and magnetically soft filler containing iron particles in amount of 60-65% of the weight of the material and silicon dioxide particles in amount of 1-4% of the weight of the material.

EFFECT: invention increases setting time of the starting composition when producing the material and reduces the probability of conglomeration of metal particles.

3 cl, 1 tbl

FIELD: chemistry.

SUBSTANCE: microporous polyurethane elastomers are obtained from a reaction mixture which contains water as a foaming agent and an auxiliary ingredient selected from one or more of the following compounds: 1,2-trans-dichloroethylene, propyl propionate, one or more hydrocarbons having boiling point from 100 to 250°C and flash point higher than 30°C. The microporous polyurethanes have shrinkage characteristics similar to those of polyurethanes foamed with R-134a. Despite the presence of the auxiliary ingredient, the prescribed polyol component in many cases has flash point higher than 65°C and is classified as non-inflammable according to ISO 1523.

EFFECT: invention enables to replace R-134a with water without requiring different forms.

8 cl, 6 tbl, 9 ex

FIELD: chemistry.

SUBSTANCE: invention relates to aldimines of formula (I)

where A does not contain active hydrogen and a primary amine group, or together with R7 denotes a (n+2)-valent hydrocarbon radical containing 3-20 carbon atoms and, if necessary, at least one heteroatom in form of oxygen of an ether group or nitrogen or a tertiary amine group; n equals 1, 2, 3 or 4; m equals 0,1, 2, 3 or 4; R1 and R2 each denotes a univalent hydrocarbon residue with 1-12 carbon atoms or together denote a divalent hydrocarbon radical which is part of a carbocyclic ring with 5-8 carbon atoms; R3 denotes H or alkyl; R4 and R5 independently denote CH3 or a univalent aliphatic radical containing 2-12 carbon atoms and optionally hydroxy groups; X denotes O, S, N-R6, or N-R7, where R6 denotes a univalent hydrocarbon radical containing 1-20 carbon atoms and having at least one hydroxy group; as well as curable compositions containing such aldimines and use of said compositions.

EFFECT: obtaining novel aldimines which can be used as curing agents in curable compositions.

22 cl, 18 ex, 6 tbl

FIELD: chemistry.

SUBSTANCE: polymer mixture consists of thermoplastic polyurethane (TPP) and a modified impact resistant methylmethacrylate polymer. Said impact-resistant methylmethacrylate polymer is modified with an impact resistant modifier with a "nucleus/shell/shell" structure. The first shell contains 80-98 wt % repeating (meth)acrylate monomers and 2-20 wt % styrene monomers of a defined formula (1). The second shell contains 50-100 wt % repeating alkylmethacrylate units, having 1-20 carbon atoms, 0-40 wt % repeating alkylacrylate units, 0-10 wt % styrene monomers of formula (1). The nucleus contains 50-99 wt % alkylmethacrylate repeating units having 1-20 carbon atoms, 0-40 wt % alkylacrylate repeating units having 1-20 carbon atoms, 0.1-2.0 wt % cross-linking repeating units and 0-8.0 wt % styrene monomers of formula (1).

EFFECT: polymer mixture is used to obtain moulded articles with high light transmission and high impact resistance at above-zero and subzero temperatures.

9 cl, 1 tbl, 2 ex

FIELD: machine-building industry.

SUBSTANCE: invention relates to the method of encapsulating o-rings manufacture for installing them between parts and units of internal combustion engines, between flange connections in chemical industry, for finishing, noise-insulating and thermal insulating panels. The method provides for grinding cork wastes to 0.5-5.0 mm. The cork wastes are mixed up with binding material based on a mixture of urethane and butadiene-acrylo-nitric rubber taken in a weight ratio 10-90:10-90. After rubber mixing with binding material, the mixture is moulded at 143-151°C and 3-10 MPa during 20-60 min. Then it is exposed at room temperature during one day. The sheets of the material are then slit and needed items are cut out. Wastes from cork, shoe and prosthetic and orthopedic production, wastes from finishing, noise and thermal insulating production, proper substandard wastes, flash chipping wastes are used as grinded cork wastes which are taken separately or in any ratios between each other.

EFFECT: invention allows for increasing reliability of o-rings and obtaining multifunctional material.

5 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to a curable composition consisting of two parts, which is stable during storage in form separate parts and solidifies when merged to obtain an essentially homogeneous polyurethane-polysiloxane mixture. Said composition contains (a) a first dry part containing a moisture-curable silylated polyurethane resin obtained (i) by reacting a polyurethane prepolymer with terminal isocyanate groups with at least one silane selected from a group consisting of mercaptosilaine and aminosilane, and a cross-linking agent for diorganopolysiloxane with terminal silanol groups; (b) a second part containing diorganopolysiloxane with terminal silanol groups; (c) a catalyst for condensation in the first and/or second part; and possibly (d) at least one additional component selected from a group consisting of diorganopolysiloxane with terminal alkyl groups, filler, a UV stabiliser, an antioxidant, an adhesion promoter, a curing accelerator, a thickener, a plasticiser, a moisture absorber, a pigment, a dye, a surfactant, a solvent and a biocide; where the additional component is present in the first and/or second parts of the composition depending on the part with which it is compatible. The invention also describes an essentially homogeneous polyurethane-polysiloxane mixture used as a sealant, adhesive or coating, obtained during solidification as a result of merging the first and second parts of said composition.

EFFECT: obtaining a composition consisting of two parts, which is stable during indefinite storage but undergoes fast solidification upon merging the two parts to obtain a polyurethane-polysiloxane mixture with good weather resistance and high heat resistance.

13 cl, 5 ex, 2 tbl

Thin condom // 2434896

FIELD: chemistry.

SUBSTANCE: condom contains natural rubber and polyurethane in form of a mixture. Preferably, the condom has single wall thickness of less than 55 mcm and burst pressure of 1.0 kPa or higher. The method of making the condom involves mixing polyurethane latex and natural rubber latex and forming a condom from said mixture.

EFFECT: invention enables to reduce wall thickness of the condom while satisfying burst pressure requirements.

26 cl, 5 dwg, 1 tbl

Up!