Pentaerythritol esters of mercapto acids plus long chain fatty acids

Claim 1

A curable composition useful for obtaining a solid polythioether having improved slip properties comprising: A. a polyene component of the formula: [A]-(X).sub.m wherein m is an integer of at least 2, wherein X is a member selected from the group consisting of: ##STR18## where h is an integer from 1 to 9; R is a radical selected from the group consisting of hydrogen, fluorine, chlorine, furyl, thienyl, pyridyl, phenyl and substituted phenyl, benzyl and substituted benzyl, alkyl and substituted alkyl, alkoxy and substituted alkoxy, cycloalkyl and substituted cycloalkyl; said substituents on said substituted members selected from the group consisting of nitro, chloro, fluoro, acetoxy, acetamide, phenyl, benzyl, alkyl, alkoxy and cycloalkyl; said alkyl and alkoxy having from one to nine carbon atoms and said cycloalkyl having from three to eight carbon atoms; wherein [A] is free of reactive carbon-to-carbon unsaturation; free of highly watersensitive members; and is a polyvalent chemically compatible member of the group consisting of carbonate, carboxylate, carbonyl, ether, silane, silicate, phosphonate, phosphite, phosphate, alkyl and substituted alkyl, cycloalkyl and substituted cycloalkyl, aryl and substituted aryl, urethane and substituted urethane, urea and substituted urea, amine and substituted amine, amide and substituted amide, hydroxyl, heterocyclic carbon containing radical, and mixtures thereof; said substituents on said members being defined above, said component having a molecular weight in the range from about 64 to 20,000; and a viscosity in the range from essentially 0 to 20 million centipoises at 70° C.; and, B. pentaerythritol ester component of the formula: ##STR19## wherein n is 0 to 2, and at least 1 and not more than 2n + 2 of the A groups are ester radicals of the structure ##STR20## wherein R is a straight chain or branched, saturated or unsaturated hydrocarbon radical containing 11 to 19 carbon atoms, and at least 2 and not more than 2n + 3 of the A groups are ester radicals of the structure ##STR21## wherein m is 0 to 1.