Cast polyester resin process and product
US4473673A · kind A · utility
28Cited by
13References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 9, 1983 |
| Grant date | Sep 25, 1984 |
| Priority date | — |
| Expiry date | May 9, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/16
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A pretreatment process to remove entrapped air from liquid polyester blends intended as the matrix of cast marble is disclosed. The formulated blend is subjected to a simultaneous evacuating, vibrating and shearing step which is critical within broad parameters. The thus treated blend, after casting, will be non-porous in cross section, thereby making it suitable for countertops and other parts which must be field cut to specifications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.