A method of obtaining a molded urethane elastomers

The invention relates to new compounds, negative in the Ames test used in the process of obtaining polyurethanes as chain extenders and staplers

The invention relates to a method for producing polyurethanes with urea groups in the chain

The invention relates to the field of synthesis of polyurethanes in solution of organic solvents and intended for artificial skin, finishing materials during chemical cleaning, as the polymer layers of semi-permeable gas diffusion materials (membranes), coatings on fabrics in the manufacture of composite materials for various purposes, as a binder in the manufacture of printing inks, sealants, insulating materials in construction, electronics, electrical engineering and t

The invention relates to formulations of liquid hardeners comprising an aromatic diamine and a mixture of non-volatile solvents intended for curing prepolymers with terminal isocyanate groups and used in the preparation of polyurethane compositions for various purposes, in particular, upon receipt of polyurethane products, operated in a cyclic mode of loading (membranes, diaphragms, pillows for forming a flexible environment, and others)

The invention relates to the field of polymer processing and relates to impart fire resistance to the polymers using as combustion inhibitors, new spiritlessly esters of boric acid, which are also the object of the invention

The invention relates to methods for elastomeric materials and may be used in the manufacture of sealants, coatings and molded articles

Polymers of formula I dissolvable or dispersible in water, as well as method for production and application thereof are disclosed. Claimed polymers are useful as thickening agents in cosmetic and therapeutic compositions. Composition containing polymers of present invention also are disclosed.

Coating composition comprising at least one compound with at least two isocyanate functional groups; at least one compound reactive to isocyanate and having at least two groups reactive to isocyanate groups, which are selected from mercapto groups, hydroxyl groups and combinations thereof; and cocatalyst consisting of phosphine and Michael acceptor, amount of catalyst constituting from 0.05 to 20% of the weight of dry residue. Invention also describes a method for coating substance with indicated composition as well as coated substrate, and adhesive containing at least one compound with at least two isocyanate functional groups and at least one compound containing at least two above defined groups reactive to isocyanate groups. Moreover, invention discloses employment of composition for finishing of great vehicles and refinishing of motor cars. Composition is characterized by drying time at a level of 20 min, modulus of elasticity 1904, Persose hardness 303, and brightness (85°C) at a level of 100.

Invention relates to polyurethane elastomers suited to manufacture polyurethane articles. Composition according to invention contains (i) 70.6-74.8% polyfurite urethane prepolymer prepared by reaction between 2.1 mile 2,4-tolylenediisocyanate and 1.0 mole poly(oxytetramethylene glycol) with molecular weight 1500 and (ii) liquid curing agent (to 100%), which is a mixture of 3,3'-dichloro-4,4'-diaminodiphenylmethane and poly(oxytetramethylene glycol) with molecular weight 1000 at their molar ratio 1:1. Thus obtained polyurethane elastomers show Shore hardness al a level of 93 relative units, breaking point (23°C) at a level of 38 MPa, elongation on fracture 712%, and abrasion resistance 27 mcm (according to Russian standard GOST 11529-86). Articles manufactured from these elastomers may find use for in-tube flaw inspection of oil and gas mains as well as oil storage tanks.

Invention relates to formulations of polyurethane elastoplastics designating for preparing soft polyurethane materials with Shore hardness value 45-55 conditional units. Invention describes the composition comprising 74.8-78.4 wt.-% of urethane pre-polymer based on 1.8 mole of 2,4-toluylene diisocyanate and 1.0 mole of polyethylenebutylene glycoladipinate of molecular mass 2000 Da and liquid hardening agent based on aromatic amine 3,3'-dichloro-4,4'-diaminodiphenylmethane and a mixture of oligoesters - polyethylene glycoladipinate of molecular mass 800 Da and polyethylenebutylene glycoladipinate of molecular mass 2000 Da taken in the mole ratio 0.34; 0.33; 0.33 (up to 100 wt.-%). Polyurethane materials prepared on the basis of such composition show Shore hardness value at the level 45 units, rupture strength limit (at 23°C) at the level 31.2 MPa, relative elongation at rupture 1100%, and they can be exploited at temperature -10°C.

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.

Invention relates to polyurethane-polyol compositions comprising product of reaction of a polyol and Herbert alcohol, the two containing In average 12 carbon atoms. Preferred polyols are α,β-diols and α,β-diols. Polyurethane-polyol compositions exhibit very low viscosity and are particularly suitable in coating compositions with very low content of volatile organics. Hardened coating obtained from claimed compositions ensure high resistance to cracking and can be applied on various substrates such as metal, plastic, wood, glass, ceramics.

In particular, invention relates to employment of polyisocyanates compositions as binders for composites containing lignocellulose fibers such as oriented wood chipboard.

Invention provides process for manufacture of rigid polyurethane foams suitable as heat-insulation coatings via interaction of polyisocyanates with polyether component in presence of foaming and curing catalysts, foaming agent, foaming control agent, and fire retardant by way of bringing polyisocyanates into contact with hydroxyl-containing mixture comprising hydroxyl-containing compound, polyether supplemented by cyclic compound of formula I (appendix 1). As low-toxicity catalyst serving for cross-linking chains, cyclic compound of formula II (appendix 2) is additionally used in amounts from 1 to 200 wt parts per 100 wt parts hydroxyl-containing compound and ether. Invention assures manufacture of foamed plastic with heat resistance at a level of 210°C, compaction stress 0.48 MPa, and moisture absorption 6.8% without significant increase in brittleness of material, which allows material to be used in construction, power engineering, ship and automobile building, oil-and-gas and refrigeration industries. Appendix 1: . Appendix 2: .

Invention is concerned with a method for preparing prepolymer for use in delivery device for single-component foamed material via polymerization of mixture containing (A) isocyanate components, (B) polyol component containing one or several polyols to impart rigidity to foamed material and (C) low-viscosity component non-reactive toward isocyanate and hydroxyl groups. Disclosed prepolymer preparation process comprises stage of removing free diisocyanate monomer from the prepolymer to a level below 2% after polymerization of mixture containing A, B, and C components or after polymerization of mixture containing A and B components followed by adding C component. Free diisocyanate monomer is removed from prepolymer using elevated temperatures and/or reduced pressures, e.g. by means of thin-layer distillation. Once distillation is completed, prepolymer jointly with commonly used additives, such as cell stabilizers, foaming agents, propellants, and catalysts, is placed in suitable delivery container.

Invention relates to polymer compositions including at least one polyurethane prepolymer A with isocyanate terminal groups obtained from at least one polyisocyanate with at least one polyol A1 and, if necessary, with at least one polyol A2. wherein A1 is linear polyoxyalkylenepolyol with unsaturation degree ,less than 0.04 m-equ/g; A2 is polyol, which is present in amount 0-30%, preferably 0-20%, in particular 0-10% based on total amount A1+A2; and at least one polyaldimine B. Composition is a mixture of polyurethane prepolymer A with polyaldimine B. In absence of moisture, such compositions are stable on storage. When being applied, such compositions are brought into contact with moisture, after which polyaldimines are hydrolyzed into aldehydes and polyamines, and polyamines react with polyurethane prepolymer containing isocyanate groups. Products obtained from such composition possess very wide spectrum of properties, including tensile strength varying within a range from 1 to 20 MPa and ultimate elongation above 1000%. Composition may be used as glue, hermetic, coating, or facing.

Sewing in moist medium meltable glue for immediate processing of glued bases contains products of interaction of multi-functional (poly)isocyanates with complex hydroxypolyethers based on polyols and dicarboxylic acids or their derivatives, suitable for carrying out condensation reactions, as dicarboxylic acid at least one linear aliphatic dicarboxylic acid from group including octadecandicarboxylic acid and hexadecandicarboxylic acid, is used.

Invention relates to polyurethane used, for example, as seat cushions, decorative elements for the inside of cars etc, and to methods of producing said polyurethane via radical-initiated cross-linking in the presence of at least one agent which produces radicals and under the effect of ionising radiation, respectively. According to the given method, at least one polyfunctional isocyanate, at least one polyol which is completely or mainly polyether polyol with molecular weight higher than 1500, and foaming ingredients are subjected to addition polymerisation and a foaming reaction in the presence of at least one component with a reactive double bond to obtain a foamed mass with a polyurethane matrix. The polyfunctional isocyanate is not 4,4'-diisocyanate diphenylmethane or does not contain 4,4'-diisocyanate diphenylmethane, and the foamed mass undergoes radical-initiated cross-linking with the component with the reactive double bond which is an acrylate or methacrylate polymer containing at least two hydroxyl groups which also react with the said isocyanate so as to be embedded into the polyurethane matrix.

Invention relates to polyesters which are used in synthesis of flexible foamed polyurethanes. Copolyester - a liquid at 50°C - has (a) an initiator segment which is a polyether with molecular weight between 300 and 1500 and at least two hydroxyl groups, and (b) at least three ester links per molecule of copolyester on average, where the said links are from a hydroxyl-containing fatty acid which contains 7 or more carbon atoms, or a mixture of two or more of the said fatty acids. The fatty acids contain a secondary hydroxyl which lies at least five carbon atoms from the carbonyl carbon atom of the acid group of the fatty acid and a primary hydroxyl with one or more hydroxymethyl groups. The copolyester contains 3.5-10 ester links per total number of hydroxyl, primary amine and secondary amine groups of the initiator compound.