Process for the production of reinforced moldings and the resultant products
US5244613A · kind A · utility
10Cited by
13References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1993 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Jan 21, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
It has been found that the use of specific expanded organic microspheres greatly improve the RIM process by (i) significantly enhancing the blowing action of air and/or nitrogen, (ii) providing for uniform density of the molded part, (iii) allowing for the reduction of internal mold pressures, (iv) substantially eliminating surface defects, (v) allowing for a significant reduction in density in the molded product, (vi) allowing for a substantial increase in the amount of air and/or nitrogen that can be dissolved in the isocyanate-reactive component, and (vii) significantly reducing shrinkage in the molded part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.