Process for preparation of high resilience polyether urethane foam

Claim 2

A PROCESS FOR PRODUCING HIGH RESILIENCE POLYETHER URETHANE FOAM, SAID PROCESS COMPRISING FOAMING AND REACTING A MIXTURE COMPRISING: I. ORGANIC POLYOL SELECTED FROM THE GROUP CONSISTING OF (A) A POLYETHER TRIOL CONTAINING AT LEAST 40 MOL PER CENT PRIMARY HYDROXYL GROUPS AND HAVING A MOLECULAR WEIGHT FROM ABOUT 2,000 TO ABOUT 8,000 AND (B) A MIXTURE OF SAID POLYETHER TRIOL AND ANOTHER POLYETHER HAVING AN AVERAGE OF AT LEAST TWO HYDROXYL GROUPS, SAID POLYETHER TRIOL OF SAID MIXTURE AMOUNTING TO AT LEAST 40 WEIGHT PER CENT OF THE TOTAL POLYOL CONTENT, II. ORGANIC POLYISOCYANATE, SAID ORGANIC POLYOL AND SAID POLYISOCYANATE BEING PRESENT IN THE MIXTURE IN A MAJOR AMOUNT AND IN THE RELATIVE AMOUNT REQUIRED TO PRODUCE THE URETHANE, III. BLOWING AGENT IN A MINOR AMOUNT SUFFICIENT TO FOAM THE REACTION MIXTURE, IV. A CATALYTIC AMOUNT OF CATALYST FOR THE PRODUCTION OF THE URETHANE, AND V. A CYANOALKY MODIFIED SILOXANE FLUID HAVING THE AVERAGE FORMULA

Claim 3

A process as defined in claim 1 wherein the catalyst is an amine catalyst, or a mixture of an organic metal catalyst and an amine catalyst.

Claim 4

A process as defined in claim 1 wherein the blowing agent is selected from the group consisting of water, a fluorocarbon compound, and mixtures thereof.

Claim 5

A process as defined in claim 1 wherein the polyisocyanate is selected from the group consisting of tolylene diisocyanate, polymethylene polyphenyl polymeric isocyanates, and mixtures thereof.

Claim 6

A process as defined in claim 1 wherein a minor amount of an additional ingredient selected from the group consisting of a flame retardant agent, an organic solvent for the amine catalyst, an organic solvent for the cyanoalkyl modified siloxane fluid, and mixtures thereof are also present in the reaction mixture.

Claim 7

A process as defined in claim 1 wherein the cyanoalkyl modified siloxane fluid is employed in the form of a siloxane fluid-organic solvent solution.

Claim 8

A process as defined in claim 1 wherein the organic solvent for the siloxane fluid is an organic polyether selected from the group consisting of mono-ol, diol and triol hydroxy compounds, and mixtures thereof.

Claim 9

A process as defined in claim 7 wherein the organic solvent is polyether triol.

Claim 10

A process as defined in claim 6 wherein a catalyst is present as an additional ingredient in the siloxane fluid-organic solvent solution.

Claim 11

A process as defined in claim 1 wherein the organic polyol polyether triol contains from about 60 to 90 mole per cent primary hydroxyl groups and has a molecular weight from about 4, 000 to 7,000.

Claim 12

A process as defined in claim 10 wherein the organic polyol is a mixture of said polyether triol and another polyether having an average of at least two hydroxyl groups said polyether triol of said mixture amounting to at least 40 weight per cent of the total polyol content.

Claim 13

A process as defined in claim 10 wherein the other polyether is a graft acrylonitrile/polyether triol.

Claim 14

A process as defined in claim 10 wherein the cyanoalkyl modified siloxane fluid has an average molecular weight of about 400 to 900; wherein R is a lower alkyl radical, X has a value of 2 to 4 inclusive, y has a value of 1 to 4 inclusive, n is 0 and z is 0.

Claim 15

A process as defined in claim 13 wherein R is methyl.

Claim 16

A process as defined in claim 14 wherein X is a gamma-cyanopropyl radical.

Claim 17

A process as defined in claim 10 wherein the cyanoalkyl modified siloxane fluid has an average molecular wEight of about 400 to 900; wherein R is a lower alkyl radical, x has a value of 2 to 4 inclusive, y has a value of 0 to 4 inclusive, n is 0 and z is 1.

Claim 18

A process as defined in claim 16 wherein R is a methyl radical.

Claim 19

A process for producing high resilience polyether urethane foam, said process comprising foaming and reacting a mixture comprising: I. an organic polyol mixture of a polyether triol, said triol containing 60 to 90 mole per cent primary hydroxyl groups and having a molecular weight from about 4,000 to 7,000 and another polyether having an average of at least two hydroxyl groups, said polyether triol of said mixture amounting to at least 40 weight per cent of the total polyol content; II. a polyisocyanate selected from the group consisting of tolylene diisocyanate, polymethylene polyphenyl polymeric isocyanate, and mixtures thereof, said isocyanates being present in an amount from 90 to 105% of the amount required to provide the stoichiometric amount of isocyanate groups required to react with the hydroxyl groups of the organic polyol mixture and any water present as a blowing agent; III. from 2 to 20 parts by weight per 100 parts by weight of the organic polyol mixture starting material of at least one blowing agent selected from the group consisting of water and fluorocarbon blowing agents; IV. a catalytic amount of an amine catalyst or a mixture of an organic metal catalyst and an amine catalyst; and V. about 0.08 to about 0.6 parts by weight per 100 parts by weight of the organic polyol mixture starting material of a cyanoalkyl modified siloxane fluid as defined in claim 13.

Claim 20

A process as defined in claim 18 wherein R is a methyl radical.

Claim 21

A process as defined in claim 19 wherein X is a gamma-cyanopropyl radical.

Claim 22

A process as defined in claim 18 wherein the cyanoalkyl modified siloxane fluid has the average formula

Claim 23

A process as defined in claim 18 wherein the cyanoalkyl modified siloxane fluid has the average formula

Claim 24

A process as defined in claim 18 wherein the cyanoalkyl modified siloxane fluid has the average formula

Claim 25

A process as defined in claim 18 wherein the cyanoalkyl modified siloxane fluid is a blend of 50 parts by weight of a siloxane fluid having the average formula

Claim 26

A process as defined in claim 18 wherein the cyanoalkyl modified siloxane fluid is used in the form of a siloxane fluid-organic solvent in solution.

Claim 27

A process as defined in claim 25 wherein the organic solvent for the siloxane fluid is an organic polyether selected from the group consisting of mono-ol, diol and triol hydroxy compounds, and mixtures thereof.

Claim 28

A process as defined in claim 26 wherein the organic solvent is polyether triol.

Claim 29

A process as defined in claim 25 wherein a catalyst is present as an additional ingredient in the siloxane fluid-organic solvent solution.