Antishrinking unsaturated polyester resin composition
US5143964A · kind A · utility
3Cited by
5References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1991 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Apr 5, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V7/24
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A moldable unsaturated polyester resin composition having improved antishrinking and shape-retaining properties contains an unsaturated polyester resin/styrene mixture, fillers, glass fibers, an antishrinkage agent and a demolding agent, wherein the demolding agent is calcium montanate and wherein the antishrinkage agent is preferably a methyl methacrylate polymer. The composition is particularly useful for the manufacture of lamp reflectors having superior shape and weight retention integrity and reduced reflector surface fogging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.