Process for the production of high resilience polyurethane foams and foams produced therefrom

Claim 2

In a process for the production of high-resilience open-celled polyurethane foams in one step wherein a foaming charge containing polyether polyols composed essentially of alkylene oxides, polyisocyanates, water, catalysts, emulsifiers or stabilizers, cross-linking agents and conventional additives, is formed, the improvement which comprises adding the followig ingredients to the foaming charge: (A) 0.01 to 2.0 g/100 g polyol of a siloxane component selected from the group consisting of: (A-1) straight-chained or branched, fractional organopolysiloxane composed of a mixture of polysiloxanes with 7 to 20 Si-atoms, where the Si-valences which are not linked through oxygen with silicon, are saturated with lower alkyl radicals or aryl radicals, where the terminal Si-atoms can have a lower alkyoxy group attached thereto; (A-2) known polyoxyalkylene-polysiloxane-block copolymers, whose siloxane block corresponds to the definition under A-1, but wherein the alkoxy radicals have been replaced by polyether blocks with an average molecular weight of less than 1500; (A-3) known straight-chained or branched organopolysiloxanes, wherein the siloxane block or blocks are substantially in statistical equilibrium, each block having on the average, 5 to 15 Si-atoms and containing at least one substituted alkyl group or an alkylaryl group per siloxane block; and (A-4) known polyoxyalkylene-polysiloxane-block copolymers, wherein the siloxane block or -blocks are substantially in statistical equilibrium and each block has on the average, 5 to 15 Si-atoms and contains attached thereto 2 to 6 polyoxyalkylene blocks with an average molecular weight of less than 1500; and (B) 0.01 to 0.2 g·hydroxy equivalent weight /100 g polyol of a cross-linking agent having at least 4 hydroxyl groups per molecule and a hydroxy equivalent weight of 30 to 180 and wherein toluylene di-isocyanate is the polyisocyanate.

Claim 3

The process of claim 1, wherein siloxane component A-1 are linear polydimethyl siloxanes.

Claim 4

A high-resilience polyurethane foam produced by the process of claim 1.

Claim 5

The foam of claim 3 in the form of open blocks having a density in the range from 18 to 50 kg/m 3 .

Claim 6

The foam of claim 3 cast in molds and having a density range between 30 to 80 kg/m 3 .

Claim 7

In a process for the production of high-resilience open-celled polyurethane foams in one step wherein a foaming charge containing polyether polyols composed essentially of alkylene oxides, polyisocyanates, water, catalysts, emulsifiers or stabilizers, cross-linking agents and conventional additives, is formed, the improvement which comprises adding the following ingredients to the foaming charge: (A) 0.01 to 2.0 g/100 g polyol of a siloxane component selected from the group consisting of: (A-1) straight-chained or branched, fractional organopolysiloxane composed of a mixture of polysiloxanes with 7 to 20 Si-atoms, where the Si-valences which are not linked through oxygen with silicon, are saturated with lower alkyl radicals or aryl radicals, where the terminal Si-atoms can have a lower alkoxy group attached thereto; (A-2) known polyoxyalkylene-polysiloxane-block copolymers, whose siloxane block corresponds to the definition under A-1, but wherein the alkoxy radicals have been replaced by polyether blocks with an average molecular weight of less than 1500; (A-3) known straight-chained or branched organopolysiloxanes, wherein the siloxane block or blocks are substantially in statistical equilibrium, each block having on the average, 5 to 15 Si-atoms and containing at least one substituted alkyl grup or an alkylaryl group per siloxane block; and (A-4) known polyoxyalkylene-polysiloxane-block copolymers, wherein the siloxane block or blocks are substantially in statistical equilibrium and each block has on the average, 5 to 15 Si-atoms and contains attached thereto 2 to 6 polyoxyalkylene blocks with an average molecular weight of less than 1500; and (B) 0.01 to 0.2 g·hydroxy equivalent weight/100 g polyol of a cross-linking agent having at least 4 hydroxyl groups per molecule and a hydroxy equivalent weight of 30 to 180, and wherein urea is added to the foaming charge in an amount of 0.05 to 1.0 g/100 g polyol.

Claim 8

In a process for the production of high-resilience open-celled polyurethane foams in one step wherein a foaming charge containing polyether polyols composed essentially of alkylene oxides, polyisocyanates, water, catalysts, emulsifiers or stabilizers, cross-linking agents and conventional additives, is formed, the improvement which comprises adding the following ingredients to the foaming charge: (A) 0.01 to 2.0 g/100 g polyol of a siloxane component selected from the group consisting of: (A-1) straight-chained or branched, fractional organopolysiloxane composed of a mixture of polysiloxanes with 7 to 20 Si-atoms, where the Si-valences which are not linked through oxygen with silicon, are saturated with lower alkyl radicals or aryl radicals, where the terminal Si-atoms can have a lower alkoxy group attached thereto; (A-2) known polyoxyalkylene-polysiloxane-block copolymers, whose siloxane block corresponds to the definition under A-1, but wherein the alkoxy radicals have been replaced by polyether blocks with an average molecular weight of less than 1500; (A-3) known straight-chained or branched organopolysiloxanes, wherein the siloxane block or blocks are substantially in statistical equilibrium, each block having on the average, 5 to 15 Si-atoms and containing at least one substituted alkyl grup or an alkylaryl group per siloxane block; and (A-4) known polyoxyalkylene-polysiloxane-block copolymers, wherein the siloxane block or blocks are substantially in statistical equilibrium and each block has on the average, 5 to 15 Si-atoms and contains attached thereto 2 to 6 polyoxyalkylene blocks with an average molecular weight of less than 1500; and (B) 0.01 to 0.2 g·hydroxy equivalent weight/100 g polyol of a cross-linking agent having at least 4 hydroxyl groups per molecule and a hydroxy equivalent weight of 30 to 180, and wherein urea is added to the foaming charge in an amount of 0.05 to 1.0 g/100 g polyol.

Claim 9

The process according to claim 6 wherein urea is added to the foaming charge in an amount of 0.2 to 0.5 g/100 g polyol.

Claim 10

In a process for the production of high-resilience open-celled polyurethane foams in one step wherein a foaming charge containing polyether polyols composed essentially of alkylene oxides, polyisocyanates, water, catalysts, emulsifiers, or stabilizers, cross-linking agents and conventional additives, is formed, the improvement which comprises adding the following ingredients to the foaming charge: (A) 0.01 to 2.0 g/100 g polyol of a siloxane component selected from the group consisting of: (A-1) straight-chained or branched, fractional organopolysiloxane composed of a mixture of polsiloxanes with 7 to 20 Si-atoms; where the Si-valences which are not linked through oxygen with silicon, are saturated with lower alkyl radicals or aryl radicals, where the terminal Si-atoms can have a lower alkoxy group attached thereto; (A-2) known polyoxyalkylene-polysiloxane-block copolymers, whose siloxane block corresponds to the definition under A-1, but wherein the alkoxy radicals have been replaced by polyether blocks with an average molecular weight of less than 1500; (A-3) known straight-chained or branched organopolysiloxanes, wherein the siloxane block or blocks are substantially in statistical equilibrium, each block having on the average, 5 to 15 Si-atoms and containing at least one substituted alkyl group or an alkylaryl group per siloxane block; and (A-4) known polyoxyalkylene-polysiloxane-block copolymers, wherein the siloxane block or blocks are substantially in statistical equilibrium and each block has on the average, 5 to 15 Si-atoms and contains attached thereto 2 to 6 polyoxyalkylene blocks with an average molecular weight of less than 1500; and (B) 0.01 to 0.2 g·hydroxy equivalent weight/100 g polyol of sorbitol as a cross-linking agent.

Claim 11

In a process for the production of high-resilience open-celled polyurethane foams in one step wherein a foaming charge containing polyether polyols composed essentially of alkylene oxides, polyisocyanates, water, catalysts, emulsifiers, or stabilizers, cross-linking agents and conventional additives, is formed, the improvement which comprises adding the following ingredients to the foaming charge: (A) 0.01 to 2.0 g/100 g polyol of a siloxane component selected from the group consisting of: (A-1) straight-chained or branched, fractional organopolysiloxane composed of a mixture of polsiloxanes with 7 to 20 Si-atoms; where the Si-valences which are not linked through oxygen with silicon, are saturated with lower alkyl radicals or aryl radicals, where the terminal Si-atoms can have a lower alkoxy group attached thereto; (A-2) known polyoxyalkylene-polysiloxane-block copolymers, whose siloxane block corresponds to the definition under A-1, but wherein the alkoxy radicals have been replaced by polyether blocks with an average molecular weight of less than 1500; (A-3) known straight-chained or branched organopolysiloxanes, wherein the siloxane block or blocks are substantially in statistical equilibrium, each block having on the average, 5 to 15 Si-atoms and containing at least one substituted alkyl group or an alkylaryl group per siloxane block; and (A-4) known polyoxyalkylene-polysiloxane-block copolymers, wherein the siloxane block or blocks are substantially in statistical equilibrium and each block has on the average, 5 to 15 Si-atoms and contains attached thereto 2 to 6 polyoxyalkylene blocks with an average molecular weight of less than 1500; and (B) 0.01 to 0.2 g·hydroxy equivalent weight/100 g polyol of sorbitol as a cross-linking agent.

Claim 12

In a process for the production of high-resilience open-celled polyurethane foams in one step wherein a foaming charge containing polyether polyols composed essentially of alkylene oxides, polyisocyanates, water, catalysts, emulsifiers, or stabilizers, cross-linking agents and conventional additives, is formed, the improvement which comprises adding the following ingredients to the foaming charge; (A) 0.01 to 2.0 g/100 g polyol of a siloxane component selected from the group consisting of: (A-1) straight-chained or branched, fractional organopolysiloxane composed of a mixture of polysiloxanes with 7 to 20 Si-atoms, where the Si-valences which are not linked through oxygen with silicon, are saturated with lower alkyl radicals or aryl radicals, where the terminal Si-atoms can have a lower alkoxy group attached thereto; (A-2) known polyoxyalkylene-polysiloxane-block copolymers, whose siloxane block corresponds to the definition under A-1, but wherein the alkoxy radicals have been replaced by polyether blocks with an average molecular weight of less than 1500; (A-3) known straight-chained or branched organopolysiloxanes, wherein the siloxane block or blocks are substantially in statistical equilibrium, each block having on the average, 5 to 15 Si-atoms and containing at least one substituted alkyl group or an alkylaryl group per siloxane block; and (A-4) known polyoxyalkylene-polysiloxane-block copolymers, wherein the siloxane block or blocks are substantially in statistical equilibrium and each block has on the average, 5 to 15 Si-atoms and contains attached thereto 2 to 6 polyoxyalkylene blocks with an average molecular weight of less than 1500; and (B) 0.01 to 0.2 g·hydroxy equivalent weight/100 g polyol of a cross-linking agent having at least 4 hydroxyl groups per molecule and a hydroxy equivalent weight of 30 to 180, and wherein the polyisocyanate is a mixture of the 2,4- and 2,6-isomers of toluylene di-isocyanate in a ratio of 80:20, respectively.

Claim 13

In a process for the production of high-resilience open-celled polyurethane foams in one step wherein a foaming charge containing polyether polyols composed essentially of alkylene oxides, polyisocyanates, water, catalysts, emulsifiers, or stabilizers, cross-linking agents and conventional additives, is formed, the improvement which comprises adding the following ingredients to the foaming charge; (A) 0.01 to 2.0 g/100 g polyol of a siloxane component selected from the group consisting of: (A-1) straight-chained or branched, fractional organopolysiloxane composed of a mixture of polysiloxanes with 7 to 20 Si-atoms, where the Si-valences which are not linked through oxygen with silicon, are saturated with lower alkyl radicals or aryl radicals, where the terminal Si-atoms can have a lower alkoxy group attached thereto; (A-2) known polyoxyalkylene-polysiloxane-block copolymers, whose siloxane block corresponds to the definition under A-1, but wherein the alkoxy radicals have been replaced by polyether blocks with an average molecular weight of less than 1500; (A-3) known straight-chained or branched organopolysiloxanes, wherein the siloxane block or blocks are substantially in statistical equilibrium, each block having on the average, 5 to 15 Si-atoms and containing at least one substituted alkyl group or an alkylaryl group per siloxane block; and (A-4) known polyoxyalkylene-polysiloxane-block copolymers, wherein the siloxane block or blocks are substantially in statistical equilibrium and each block has on the average, 5 to 15 Si-atoms and contains attached thereto 2 to 6 polyoxyalkylene blocks with an average molecular weight of less than 1500; and (B) 0.01 to 0.2 g·hydroxy equivalent weight/100 g polyol of a cross-linking agent having at least 4 hydroxyl groups per molecule and a hydroxy equivalent weight of 30 to 180, and wherein the polyisocyanate is a mixture of the 2,4- and 2,6-isomers of toluylene di-isocyanate in a ratio of 80:20, respectively.