Internal mold release compositions containing phosphate esters

Details Internal mold release compositions containing phosphate esters Internal mold release compositions containing phosphate esters

1998-12-08

1999-10-05

Niland, Patrick D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524145, 524590, 528 51, C08J 300, C08K 320, C08L 7500, C08G 1808

Patent

active

059625619

ABSTRACT:
Internal mold release compositions for molding polyurethane and polythiourethane is disclosed herein. The composition includes a mixture of: (a) a mono C.sub.2 -C.sub.6 alkyl phosphate; (b) 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 may be the same or different; and (c) a C.sub.7 -C.sub.18 mono- and/or di-alkyl phosphate. Also disclosed is a polymerizable composition which includes (a) one or more 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, wherein the mono- C.sub.2 -C.sub.6 alkyl phosphate is present in an amount of .gtoreq.20 wt %, based on the total weight of the mixture of the mono- C.sub.2 -C.sub.6 alkyl phosphate and the di- C.sub.2 -C.sub.6 alkyl phosphate. The composition can also optionally include the C.sub.7 -C.sub.18 mono- and/or di-alkyl phosphate.

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