Method of producing elastic polyurethane foam products
(57) Abstract:Usage: in the furniture industry, vehicles, packaging, manufacture of toys. The essence of the invention: a simple polyester, water, catalyst, silicone prestabilization and target additives are mixed, add to the mixture of prepolymer based on toluylene diisocyanate with 20 to 3 wt.% isocyanate groups and Polyoxypropylenediamine from 10 to 18 wt. % end ethyleneoxide groups and a hydroxyl number of 26 to 36 mg KOH/g Prepolymer added in an amount to provide the ratio between isocyanate groups and active Cheremisinova hydrogen atoms (0,8 - 1,2) : 1, molded products with a volume of 0.15 m3and more. table 1. The invention relates to polyurethane chemistry and relates to a method of producing elastic polyurethane foam product of more than 0.15 m3used in the furniture industry, vehicles, toys, etc.There is a method of producing elastic polyurethane foam product by mixing polyether, water, silicone prestabilization, catalyst, aromatic diisocyanate and special additives (1).The way pozvaleet due to the use of toluylene diisocyanate, the complexity of the technological process, as well as the low strength properties of the obtained polyurethane foam.The closest in technical essence is a method of producing elastic polyurethane foam product by mixing polyether, water, catalyst, silicone prestabilization and special additives, the compounds of the mixture with prepolymers based on toluylene diisocyanate and Polyoxypropylenediamine with subsequent dosing of the mixture in the form (2).The disadvantage of this method is the impossibility of obtaining products with a volume of 0.15 m3and more.The aim of the invention is the obtaining of products from polyurethane foam with a volume of more than 0.15 m3.This goal is achieved by the fact that as prepolymer use connection-based Polyoxypropylenediamine with 10-18 wt. % end ethyleneoxide groups and gidroksilnym number 26-36 mg KOH/g and containing 20 3 wt.% isocyanate groups, taken in an amount to provide a ratio of isocyanate groups and active Servicenow hydrogen atoms (0,8-1,2) : 1.In the invention using the following connections:
simple palp), Desmophen 3900 (Bayer), etc.;
water as a blowing agent;
as a catalyst for nitrogen-containing compounds, for example, 1,4-diazabicyclo-2,2,2-octane, dimethylethanolamine, bis-dimethylaminoethyl ether derivatives of the research, triethylamine, urea, derivatives of piperazine;
the copolymers of siloxanes with polyoxyalkylene as silicone stabilizer, for example, cap-2, cap-8, L-540, L-620 (company Union carbide) DC-190 (the company Dow Corning, USA), and others;
prepolymer based on toluylene diisocyanate and Polyoxypropylenediamine with 10-18 wt.% end ethyleneoxide groups and a hydroxyl number 26-36 mg KOH/g is a storable liquid with a viscosity of 300-800 MPas at 20aboutC;
as the target additives using various cross-linking agents that are active with respect to NCO groups, for example, alkanolamine, various flame retardants, dyes.Mixing of the components is carried out in 2 stages: first, in a simple polyester with 18-40aboutTo add water, catalyst, prestabilization and targeted supplements, and then the resulting mixture is combined with prepolymers, taken in an amount to provide a ratio of isocyanate g is R. In the capacity of 80 l put 35 kg polyether mol. m 3600 containing 12% ethyleneoxide groups, statistically placed along the chain of the macromolecule, 1.22 kg of water, 0,17 kg CEP-2A, 0.05 kg of diazabicyclo, 0,17 kg of carbon black. These products mix, using a disk stirrer with a speed of 900 rpm for 10 min, add 28,4 kg prepolymer on the basis of TDI 80/20 and Polyoxypropylenediamine with 13 wt.% end ethyleneoxide groups and a hydroxyl number of 34 kg KOH/g, containing 22 wt.% isocyanate groups. The ratio between the isocyanate groups of prepolymer and active Servicenow atoms of hydrogen donors which are simple polyester and water, is 0.9 to 1. Stir the mixture for 12 and then quickly poured into a form with a capacity of 2 m3representing a parallelepiped with dimensions 2 x 1 x 1 m Wall and the cover forms lined with plastic wrap. After 15 min after pouring in the form of a mixture of the product is recovered and 24 h stand. METHOD of producing ELASTIC POLYURETHANE foam PRODUCT by mixing polyether, water, catalyst, silicone prestabilization and special additives, the compounds of the mixture with preium mixture in the form characterized in that, with the aim of obtaining products of more than 0.15 m3as prepolymer use connection-based Polyoxypropylenediamine from 10 to 18 wt.% end ethyleneoxide groups and a hydroxyl number of 26 to 36 mg KOH/g and containing 203 wt.% isocyanate groups, taken in an amount to provide a ratio of isocyanate groups and active Servicenow hydrogen atoms (0,8-1,2):1.
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: 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
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.
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
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
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
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
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
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
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