Polymerizable composition
US5221721A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 10, 1992 |
| Grant date | Jun 22, 1993 |
| Priority date | — |
| Expiry date | Jul 10, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L75/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The resistance to yellowing caused by post formation heating of a solid organic polymer produced by polymerizing a polymerizable composition comprising: PA0 (a) from about 55 to about 89 percent by weight poly(allyl carbonate)-functional material selected from the group consisting of poly(allyl carbonate)-functional monomer, prepolymer of said monomer, and a mixture thereof; PA0 (b) from about 10 to about 30 percent by weight vicinally aliphatic polyurethane having two ethylenically unsaturated terminal groups of which at least about 40 mole percent are allyl terminal groups; and PA0 (c) from about 0.05 to about 0.5 percent by weight organic pyrocarbonate selected from the group consisting of dialkyl pyrocarbonate, dicycloalkyl pyrocarbonate, bis(cycloalkylalkyl) pyrocarbonate, and a mixture thereof; is enhanced by also including in the polymerizable composition from about 0.05 to about 0.5 percent by weight triphenyl phosphite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.