Prefoamed particles of crosslinked propylene-type resin and molded article prepared therefrom
US4617323A · kind A · utility
19Cited by
7References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1985 |
| Grant date | Oct 14, 1986 |
| Priority date | — |
| Expiry date | Feb 12, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2323/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Prefoamed crosslinked propylene-type resin particles prepared by using as a base resin a propylene random copolymer whose amount of heat of crystallization determined by a DSC method is 19 to 10 cal/g. The prefoamed particles have a gel fraction of 1 to 65%. Also provided is a molded article of a crosslinked propylene-type resin which is a fused aggregate of the aforesaid prefoamed particles in which the number of cells, N per mm.sup.2, and the density, d (g/cm.sup.3), have the relation represented by the expression 2<N.sup.1/2 /d.sup.1/3 <45.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.