Abstract:
A polyol includes the reaction product of an epoxidized oil and an organic acid. The epoxidized oil and the organic acid are reacted in the presence of a Lewis base catalyst including at least one of a phosphorous atom or a nitrogen atom. The polyol is formed by a method that includes the step of reacting the epoxidized oil with the organic acid in the presence of the Lewis base catalyst.
Abstract:
A flexible polyurethane foam having a density of 3 comprises a reaction product of a polyisocyanate composition and an isocyanate-reactive composition. The polyisocyanate composition comprises a polymeric MDI component and a monomeric MDI component comprising 2,4'-MDI that is present in the monomeric MDI in an amount > 35 parts by weight of the 2,4'-MDI based on 100 parts by weight of the monomeric MDI. The isocyanate-reactive composition comprises a primary hydroxyl- terminated graft polyether polyol and a second polyol different from the primary hydroxyl-terminated graft polyether polyol. The primary hydroxyl-terminated graft polyether polyol comprises a carrier polyol and particles of co-polymerized styrene and acrylonitrile. The carrier polyol has a weight average molecular weight of > 3,500 g/mol.
Abstract:
A single layer flexible foam includes the reaction product of an (A) isocyanate component and a (B) isocyanate -reactive component. The isocyanate component and the isocyanate-reactive component react in the presence of a (C) polyurethane gel. The polyurethane gel has a viscosity of from about 3,000 to about 12,000 cps at 25°C and includes the reaction product of a polyol component and a second isocyanate component which react at an isocyanate index of from about 10 to about 70. The flexible foam also includes a plurality of agglomerated gel substrates that are formed from the polyurethane gel and that are dispersed in the flexible foam. The flexible foam is formed using a method including the steps of providing (A), providing (B), providing (C), and combining (C) with (A) and (B), such that (A) and (B) react in the presence of (C) to form the flexible foam.
Abstract:
A flexible polyurethane foam comprises the reaction product of an isocyanate component and an isocyanate-reactive component in the presence of a blowing agent. The isocyanate component comprises a polymeric diphenylmethane diisocyanate component and a monomeric diphenylmethane diisocyanate component. The monomeric diphenylmethane diisocyanate component comprises 2,4'- diphenylmethane diisocyanate and 4,4' -diphenylmethane diisocyanate. The isocyanate-reactive component comprises a polyether polyol having a molecular weight of from about 700 to about 20,000 and a plurality of terminal caps which are substantially free of ethylene oxide groups. The flexible polyurethane foam is substantially free of supplemental flame retardant additives and exhibits flame retardance under flammability tests according to California Technical Bulletin 117 regulations.
Abstract:
A single layer flexible foam includes the reaction product of an (A) isocyanate component and a (B) isocyanate -reactive component. The isocyanate component and the isocyanate-reactive component react in the presence of a (C) polyurethane gel. The polyurethane gel has a viscosity of from about 3,000 to about 12,000 cps at 25°C and includes the reaction product of a polyol component and a second isocyanate component which react at an isocyanate index of from about 10 to about 70. The flexible foam also includes a plurality of agglomerated gel substrates that are formed from the polyurethane gel and that are dispersed in the flexible foam. The flexible foam is formed using a method including the steps of providing (A), providing (B), providing (C), and combining (C) with (A) and (B), such that (A) and (B) react in the presence of (C) to form the flexible foam.
Abstract:
The invention relates to a method for producing viscoelastic polyurethane flexible foam materials by converting a) polyisocyanates with b) compounds having at least two hydrogen atoms reactive with isocyanate groups, and c) blowing agents, characterized in that the compounds having at least two hydrogen atoms reactive with isocyanate groups b) comprise b1) 0 to 90 parts by weight of at least one polyether alcohol made of exclusively propylene oxide units or propylene oxide units and a maximum of 50% by weight, relative to the total amount of alkylene oxide ethylene oxide units used in the polyether chain, having a nominal functionality of 3-8 and a hydroxyl number in the range of 100 to 350 mg KOH/g, and b2) 10 to 100 parts by weight of at least one graft polyol that can be produced by in situ polymerization of olefinically unsaturated monomers in at least one polyether alcohol comprising exclusively propylene oxide units or propylene oxide units and a maximum of 50% by weight, relative to the total amount of the alkylene oxide ethylene oxide units in the polyether chain, having a nominal functionality of 2-8 and a hydroxyl number in the range of 100 to 350 mg KOH/g, having a solids content of a maximum of 60% by weight, relative to the total amount of the polyols and solids used, the sum of the parts by weight b1) and b2) being 100.
Abstract:
A flexible polyurethane foam having a density of 35 parts by weight of the 2,4'-MDI based on 100 parts by weight of the monomeric MDI. The isocyanate-reactive composition comprises a primary hydroxyl- terminated graft polyether polyol and a second polyol different from the primary hydroxyl-terminated graft polyether polyol. The primary hydroxyl-terminated graft polyether polyol comprises a carrier polyol and particles of co-polymerized styrene and acrylonitrile. The carrier polyol has a weight average molecular weight of > 3,500 g/mol.
Abstract:
The subject disclosure provides a viscoelastic polyurethane foam and a method of forming the viscoelastic polyurethane foam. The viscoelastic polyurethane foam comprises the reaction product of a toluene diisocyanate and an isocyanate reactive component. The isocyanate reactive component comprises a first polyether triol, a second polyether triol, an amino alcohol chain extender, and a hydrolyzable polyether polydimethylsiloxane copolymer. The first polyether triol has a weight-average molecular weight of from 500 to 5,000 g/mol, at least 60 parts by weight ethyleneoxy units, based on the total weight of the first polyether triol, and at least 10% ethyleneoxy end caps. The second polyether triol, which is different from the first polyether triol, has a weight-average molecular weight of from 5,000 to 10,000 g/mol and at least 80% ethyleneoxy end caps.
Abstract:
Se describe una espuma flexible monocapa que contiene el producto de la reacción de (A) un componente isocianato, y (B) un componente reactivo con isocianato. El componente isocianato y el componente reactivo con isocianato reaccionan en presencia de (C) un gel de poliuretano. El gel de poliuretano tiene una viscosidad desde aproximadamente 3,000 hasta aproximadamente 12,000 cps a 25°C e incluye el producto de la reacción de un componente poliol y un segundo componente isocianato los cuales reaccionan a un índice de isocianato desde aproximadamente 10 hasta aproximadamente 70. La espuma flexible también tiene una pluralidad de sustratos de gel aglomerados que se forman a partir del gel de poliuretano y que se dispersan en la espuma flexible. La espuma flexible se forma utilizando un método que comprende los pasos de proporcionar (A), proporcionar (B), proporcionar (C) y combinar (C) con (A) y (B), de modo que (A) y (B) reaccionen en presencia de (C) para formar la espuma flexible.
Abstract:
1.- La invención se refiere a un método para producir materiales de espuma flexible viscoelástica de poliuretano al convertir a) poliisocianatos con b) compuestos que tienen por lo menos dos átomos de hidrógeno reactivos con grupos isocianato, y c) agentes sopladores, caracterizado además porque los compuestos tienen por lo menos dos átomos de hidrógeno reactivos con grupos isocianto b) comprenden b1) 0 a 90 partes en peso de por lo menos un alcohol de poliéter hecho de unidades de exclusivamente óxido de propileno o unidades de óxido de propileno y un máximo de 50% en peso, relativo a la cantidad total de unidades de óxido de etileno de óxido de alquileno usadas en la cadena de poliéter, teniendo una funcionalidad nominal de 3-8 y un número de hidroxilo en el rango de 100 a 350 mg KOH/g, y b2) 10 a 100 partes en peso de por lo menos un poliol de injerto que se puede producir por polimerización in-situ de monómeros olefínicamente insaturados en por lo menos un alcohol de poliéter que comprende unidades de excluvisamente óxido de propilen o unidades de óxido de propileno y un máximo de 50% en peso, relativo a la cantidad total de las unidades de óxido de etileno y óxido de alquileno en la cadena de poliéter, teniendo una funcionalidad nominal de 2-8 y un número de hidroxilo en el rango de 100 a 350 mg KOH/g, teniendo un contenido de sólidos de un máximo de 60% en peso, relativo a la cantidad total de los polioles y sólidos usados, la suma de las partes en peso bi) y b2) siendo 100.