Preliminarily foamed particles of non-crosslinked polypropylene-type resin
US4587270A · kind A · utility
21Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1984 |
| Grant date | May 6, 1986 |
| Priority date | — |
| Expiry date | Nov 21, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2323/16
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Preliminarily foamed particles of a non-crosslinked polypropylene resin based on an alpha-olefin/propylene random copolymer having an amount of the heat of crystallization in the range of 5 to 15 cal/g, said preliminarily foamed particles having such a crystal structure that when a DSC curve is drawn by means of a differential scanning calorimeter, by heating 1 to 3 mg of the preliminarily foamed particles to 220.degree. C. at a rate of 10.degree. C./min., a high temperature peak is observed at a higher temperature than the temperature of the peak inherent to the base resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.