Internal mold release compositions containing phosphate esters

A polymer produced by a reaction of a composition comprising:

• (a) one or monomers containing two or more isocyanate groups;
• (b) one or more monomers containing two or more functional groups selected from a thiol group and a hydroxyl group;
• (c) a mixture of a mono- C.sub.2 -C.sub.6 alkyl phosphate and a di- C.sub.2 -C.sub.6 alkyl phosphate, wherein the alkyl groups of the di-alkyl phosphate may be the same or different, and wherein the alkyl groups of the mono- and di-alkyl phosphate mixture may be the same or different;
• and
• (d) a C.sub.7 -C.sub.18 mono- and/or di-alkyl phosphate, wherein the alkyl groups of the C.sub.7 -C.sub.18 di-alkyl phosphate may be the same or different, and wherein the alkyl groups C.sub.7 -C.sub.18 mono- and di-alkyl phosphate may be the same or different;
• and
• (e) a catalyst;
• wherein the mono C.sub.2 -C.sub.6 alkyl phosphate is present in the mono C.sub.2 -C.sub.6 /di C.sub.2 -C.sub.6 alkyl phosphate mixture in an amount of about 45% by weight, and the di C.sub.2 -C.sub.6 alkyl phosphate is present in the mono C.sub.2 -C.sub.6 /di C.sub.2 -C.sub.6 alkyl phosphate mixture in an amount of about 55% by weight.

A process for producing a polymer, comprising:

• (a) providing a composition comprising:
• (i) one or more monomers containing two or more isocyanate groups, (ii) one or more monomers containing two or more functional groups selected from a thiol group and a hydroxyl group, (iii) a mixture of a mono C.sub.2 -C.sub.6 alkyl phosphate and a di- C.sub.2 -C.sub.6 alkyl phosphate, wherein the alkyl groups of the di-alkyl phosphate may be the same or different, and wherein the alkyl groups of the mono- and di- C.sub.2 -C.sub.6 alkyl phosphate mixture may be the same or different, (iv) a C.sub.7 -C.sub.18 mono- and/or di-alkyl phosphate, wherein the alkyl groups of the C.sub.7 -C.sub.18 di-alkyl phosphate may be the same or different, and wherein the alkyl groups C.sub.7 -C.sub.18 mono- and di-alkyl phosphate may be the same or different, and (v) a catalyst;
• wherein the mono C.sub.2 -C.sub.6 alkyl phosphate is present in the mono C.sub.2 -C.sub.6 /di C.sub.2 -C.sub.6 alkyl phosphate mixture in an amount of about 45% by weight, and the di C.sub.2 -C.sub.6 alkyl phosphate is present in the mono C.sub.2 -C.sub.6 /di C.sub.2 -C.sub.6 alkyl phosphate mixture in an amount of about 55% by weight;
• and
• (b) subjecting the composition to a polymerization reaction.