Unsaturated polyester resin compositions containing compatible compounds
US5089544A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1989 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Oct 30, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L67/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A sheet molding composition is disclosed which includes a four component resinous system which comprises (a) an unsaturated polyester comprising a polycondensation product of one or more dihydric alcohols and one or more ethylenically unsaturated polycarboxylic acids; (b) one or more low-profile additives which are thermoplastic polymers which cause phase separation and porosity during the curing reaction; (c) one or more olefinically unsaturated monomers which copolymerizes with the unsaturated polyester; and, (d) one or more compatible components containing one or more polyoxyethane substituents. The compatible components remain compatible when the polyester and monomer cure and impart improved surface characteristics when added to typical low-profile resin systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.