Coating and molding compositions with spreadability improving and lubricity increasing siloxanes and use of such siloxanes as coating and molding composition additives

Claim 1

A composition of matter selected from the group consisting of coating compositions and molding compositions further comprising an effective spreadability enhancing and lubricity improving amount of a polyester group containing siloxane corresponding to the formula ##STR22## wherein: R 1 represensts an alkyl group having 1 to 30 carbon atoms and up to 20 weight percent of the alkyl groups may be replaced by phenyl groups substituted by from 0 to 3 methyl groups or by phenylalkylene groups in which the phenyl group may be substituted by 0 to 3 methyl groups and the alkylene group contains 2 to 3 carbon atoms; A represents methyl or R 2 --Z--, B represents methyl or R 2 --Z--, R 2 represents an aliphatic, cycloaliphatic or aromatic polyester group free of Zerewittinoff hydrogen atoms and containing at least three ##STR23## groups, said polyester group having an average molecular weight from about 200 to about 3000, Z represents a divalent group that connects a silicon atom to an R 2 group, x represents a number from 3 to 250, and y represents a number from 0 to 50; the molecules of said siloxane contain on the average at least one R 2 --Z-- group, and the ratio of the number of R 2 --Z-- groups to x is from 1:2 to 1:40.

Claim 19

A method of improving the spreadability and increasing the lubricity of a composition selected from the group consisting of coating compositions and molding compositions comprising adding to said composition an effective spreadability increasing and lubricity improving amount of a polyester group containing siloxane corresponding to the formula: ##STR27## wherein: R 1 represents an alkyl group having 1 to 30 carbon atoms and up to 20 weight percent of the alkyl groups may be replaced by phenyl groups substituted by from 0 to 3 methyl groups or by phenylalkylene groups in which the phenyl group may be substituted by 0 to 3 methyl groups and the alkylene group contains 2 to 3 carbon atoms; A represents methyl or R 2 --Z--, B represents methyl or R 2 --Z--, R 2 represents an aliphatic, cycloaliphatic or aromatic polyester group free of Zerewittinoff hydrogen atoms and containing at least three ##STR28## groups, said polyester group having an average molecular weight from about 200 to about 3000, Z represents a divalent group that connects a silicon atom to an R 2 group, x represents a number from 3 to 250, and y represents a number from 0 to 50; the molecules of said siloxane contain on the average at least one R 2 --Z-- group, and the ratio of the number of R 2 --Z-- groups to x is from 1:2 to 1:40.

Claim 20

A method of improving the spreadability and increasing the lubricity of a composition selected from the group consisting of coating compositions and molding compositions comprising adding to said composition an effective spreadability increasing and lubricity improving amount of a polyester group containing siloxane corresponding to the formula: ##STR27## wherein: R 1 represents an alkyl group having 1 to 30 carbon atoms and up to 20 weight percent of the alkyl groups may be replaced by phenyl groups substituted by from 0 to 3 methyl groups or by phenylalkylene groups in which the phenyl group may be substituted by 0 to 3 methyl groups and the alkylene group contains 2 to 3 carbon atoms; A represents methyl or R 2 --Z--, B represents methyl or R 2 --Z--, R 2 represents an aliphatic, cycloaliphatic or aromatic polyester group free of Zerewittinoff hydrogen atoms and containing at least three ##STR28## groups, said polyester group having an average molecular weight from about 200 to about 3000, Z represents a divalent group that connects a silicon atom to an R 2 group, x represents a number from 3 to 250, and y represents a number from 0 to 50; the molecules of said siloxane contain on the average at least one R 2 --Z-- group, and the ratio of the number of R 2 --Z-- groups to x is from 1:2 to 1:40.