Method of producing elastic polyurethane foam |
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IPC classes for russian patent Method of producing elastic polyurethane foam (RU 2093527):
 The sealing composition / 2089589
The invention relates to the field of production of two-component compounds with increased strength and can be used to seal the membrane elements
 The method of obtaining models moulds / 2073028
 The method of obtaining polyetherurethanes modifier to nitrocellulose paints and varnishes / 2091406
The invention relates to methods of synthesis of polyetherurethanes in organic solvents and allows you to get the modifier "Plaster RK-0130 (TU 84-7509103.351-92) with adjustable viscosity, designed to improve the quality nitrocellulose lacquer materials, and represents a 30 - 45% solution in butyl acetate of a product of the interaction of polifonica with diisocyanate
 The method of producing polyurethane / 2078773
The invention relates to the synthesis of polyurethane elastomers with improved physical-mechanical properties: tensile strength, elongation, tear resistance, high cyclic durability
The method of obtaining models moulds / 2073028
The method for obtaining solutions of linear polyurethanes / 2050373
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
 Catalytic system suitable for the manufacture of polyurethane coating composition for producing polyurethane coating, the method of obtaining / 2024553
The invention relates to the field of synthesis of polyurethane curable coatings using catalysts and can be used in paint industry
 A method of obtaining a hard moulded polyurethane foam / 2080336
The invention relates to the field of production of rigid moulded polyurethane foam and can be used in various industries for manufacturing of large-sized products of variable thickness and complex configuration
 The way to obtain hydroxyl-containing component for the production of flexible molded polyurethane foam / 2076877
The invention relates to polyurethane chemistry and relates to a method of obtaining a hydroxyl-containing component for the manufacture of flexible molded polyurethane foam (PUF), which can be used in the furniture and automotive industries
 The method of producing polyurethane foam / 2076115
The invention relates to methods for producing a rigid polyurethane foam used in the manufacture of refrigeration equipment, construction, etc
 The method of producing polyurethane and composition to obtain / 2073027
The invention relates to a method for producing a polyurethane elastomer, fluoropolymer flexible segments and isocyanate terminal groups
 Method of producing elastic polyurethane foam / 2072367
The invention relates to a method for producing a flexible polyurethane foam used in furniture industry for the manufacture of depreciation of items of different configurations
 Method of producing elastic polyurethane foam cold molded / 2059665
The invention relates to the chemistry of polyurethanes and concerns a method for obtaining a polyurethane composition for the manufacture of flexible polyurethane foam (PUF) cold forming, which can be used in the furniture, automotive and other industries
 Foam / 2058338
The invention relates to the production of foams based on urea-formaldehyde resins and isocyanates
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(57) Abstract: The invention relate to the field of production of flexible foams used for making Bicycle saddles, seats of cars and other products operating in the mode of multiple deformations. The essence of the method lies in the fact that the flexible polyurethane foam is produced by interaction of the hydroxyl-containing component, including polyoxyethyleneglycol, water, amine catalyst, a non-ionic emulsifier, and optionally a plasticizer consisting of a mixture of dioxane alcohols and their high-boiling esters, with isocyanates prepolymers. As isocyanates prepolymer use the product of the interaction of a mixture of diisocyanate TDI with polyisocyanates taken in the ratio of 90: 10, and polyoxyethyleneglycol with a content of NCO-groups in isocyanato component 221%. The components are taken in the following ratio, wt. hours : polyoxyethyleneglycol 100; triethylenediamine of 0.4-0.5; water 1,25-2,3; nonionic emulsifier 0,35-0,5; triethylamine and 0.09-0.1; dibutyltindilaurate tin 0,08-0,1; plasticizer consisting of a mixture of dioxane alcohols and their high-boiling esters 5-7,5; the isocyanate prepolymer with a content of NCO-groups, 221%, 65-87. Izgotavlivaet the Yu deformation 40% 5-13 kPa) at a density of 0.06 to 0.2 g/cm3necessary for the manufacture of Bicycle saddles and seats of cars, and possess high tensile strength and high elasticity, which is also important for a given application. table 1. The present invention relates to the field of production of flexible polyurethane foam (PUF), used for the manufacture of Bicycle saddles, seats of cars and other products operating in the mode of multiple strains. A known method of producing polyurethane foam (ed.St. 430125, USSR) on the basis of polyethers, used as block copolymers of propylene oxide and ethylene oxide with integral oxyethylene units and a molecular weight of 300 4800, and as the isocyanate component a mixture of a diisocyanate, a diol with a molecular weight of 300 to 800 and MDI. However, the polyurethane foams obtained by the described method have low strength characteristics (p115 kPa) and low relative elongation. These vies are used mainly for the manufacture of upholstered furniture elements. Known way to obtain a flexible polyurethane foam by reacting polyoxyethyleneglycol, 1,4-butandiol, water, the government of the USSR N 968045). The specified method of manufacturing a polyurethane foam according to the recipe of its components closest to the offer. This method is adopted for the prototype. Microequities the polyurethane foams obtained by the described method have high strength characteristics and relative elongation, can withstand repeated deformation and are used mainly for the manufacture of parts bottom shoes. However, microequities foams have a high stiffness (resistance to compression deformation of 40% is 250 kPa when the hardness of the TM-2 60-62 srvc.ed.) and a higher density (0.5 to 0.6 g/cm3that does not allow their use for the manufacture of Bicycle saddles and seats for vehicles. In addition, microequities foams have very little start-up time (3-8), which is necessary in the manufacture of Shoe soles and unacceptable for the manufacture of saddles and seats for cars. Polyurethane foam for the manufacture of Bicycle saddles and seats of cars should have less stiffness and average density of 0.12-0.16 g/cm3to have sufficient strength and elasticity. The aim of the invention is to provide a flexible polyurethane foam with low stiffness resistance, good discharge performance the characteristics and elasticity. This goal is achieved by the fact that in the hydroxyl-containing component (component a) based on polyoxyethyleneglycol containing water, amine catalyst and a nonionic emulsifier, optionally enter an active plasticizer consisting of a mixture of dioxane alcohols and their high-boiling esters and containing 4.2 to 4.4% of hydroxyl groups. As isocyanatobenzene component (component b) use prepolymer synthesized on the basis of polyoxyethyleneglycol, product of TDI and MDI, and the components are taken in the following ratio, wt.h. Polyoxyethyleneglycol 100Triethylenediamine 0,4-0,5 Water 1,25-2,3 Nonionic emulsifier 0,35-0,5 The triethylamine and 0.09-0,1 Dibutyltindilaurate tin 0,08-0,1 The plasticizer consisting of a mixture of dioxane alcohols and their high-boiling esters 5-7,5 Isocyanates prepolymer with a content of NCO-groups is equal to 221% - 65-87 Comparative analysis of the proposed technical solution with the prototype shows that in the proposed method, in contrast to the known component And introduced a plasticizer consisting of a mixture of dioxane alcohols and their high-boiling ethers containing from 4.2 to 4.4% of hydroxyl groups. the material with lower rigidity, using the known method of reducing the density by increasing the water content is not possible, as the increase in the number of water also increases the stiffness of the material. The introduction of a plasticizer consisting of a mixture of dioxane alcohols and their high-boiling esters, allows for the increase of water content in the system to maintain a high elasticity polyurethane foam. In addition, the plasticizer is active for polyurethane systems, it contains a hydroxyl group and interacts with the terminal isocyanate groups of component B, due to what is included in the main chain of the polymer and provides the high strength properties of the finished foam. To obtain the required density polyurethane foam components are taken in a specific mass ratio, above. This allows us to conclude that the proposed method has a "novelty" and meets the criterion of "inventive step". Through the use of aggregate distinctive essential features of the proposed method allows to obtain a flexible polyurethane foam with a density of 0.06 to 0.20 g/cm3high strength charge to make a conclusion on the conformity of the proposed technical solution the criterion of "useful effect". Examples of specific methods for producing polyurethane foams. Example 1. Component a is prepared from a mixture of the following components: 100 g polyoxyethyleneglycol injected with 0.4 g of triethylenediamine, pre-dissolved 2.3 g of distilled water, then add successively 0.09 g of triethylamine and 7.5 g of a plasticizer consisting of a mixture of dioxane alcohols and their high-boiling esters, 0.08 g dibutyltindilaurate tin and 0.5 g of emulsifier PMS. The mixture is stirred with a mechanical stirrer with a speed of 1500 rpm and at 20-25oC for 20-30 minutes Component B is prepolymer, which is prepared by mixing two diisocyanates: TDI and the polyisocyanate, taken in the ratio of 90:10 and polyoxyethyleneglycol, which for the passage of reaction is metered into the mixture of diisocyanates with such speed that the temperature in the reactor was maintained 60-65oC. the Number of polyoxyethyleneglycol take from this calculation that prepolymer had a content of isocyanate groups is equal to 221% After dispensing the contents of the reactor are stirred for 1 hour, after which the finished component B is poured into a container with a tight-fitting lid. To obtain mesh intensively stirred with a stirrer at a speed of 2000 rpm and poured into a mold to determine the density and strength characteristics of the foam. The fabrication of components a and B in terms of production it is produced by injection molding machines of the type "Trusina". The components are mixed in the mixing head, where the mixture is fed into a pre-prepared coated antiadhesion form for the manufacture of saddles and seats. Form after filling incubated for 10-15 min at room temperature, after which the finished product is extracted from forms. Examples 2 and 3 is similar to example 1. Properties of the foams obtained by the proposed method and the prototype shown in the table. Changing the ratio of components in the direction of increase or decrease of their content is not desirable, as it can disrupt the structure of foam or a complete inability to obtain spinnage material (i.e. foam). On the basis of the proposed method developed new brands of flexible polyurethane type foam-16 with a density of 0.06 to 0.2 g/cm3and low stiffness (resistance to compression deformation of 40% is 5-13 kPa), which has high tensile strength and elasticity. Previously for the manufacture of Bicycle saddles and seats of machines is widely used sponge rubber, the La of their receipt of latex on the basis of scarce natural rubber. Developed flexible polyurethane foams can be successfully used instead of sponge rubber. Bikes made with seats from flexible polyurethane foam-16, industrial Association "Velta" successfully passed the road test on the roads with asphalt and gravel surfaces. Method of producing elastic polyurethane foam by reacting hydroxyl-containing component, including polyacetate etilenglikol, water, amine catalyst, nonionic emulsifier, with the isocyanate prepolymer, characterized in that as the amine catalyst used triethylamine, triethylenediamine, hydroxyl-containing component is further added plasticizer consisting of a mixture of dioxane alcohols and their high-boiling esters and dibutyltindilaurate tin, and as the isocyanate prepolymer use prepolymer on the basis of a mixture of toluylene diisocyanate with polyisocyanate, taken in the ratio of 90 to 10, and polyoxyethyleneglycol, when the content of NCO-groups 221% in the following ratio, wt.h. Polyoxyethyleneglycol 100 Triethylenediamine 0,4 0,5 Water 1,25 2,3 Nonionic emulsifier 0,35 0,5 The triethylamine 0,09 0,1 Dirov 5,0 7,5 The isocyanate prepolymer with a content of NCO-groups is equal to 221% 65 - 87,
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