Foamed and expanded beads of polyester-based resin and foam molding obtained therefrom
US6686400B2 · kind B2 · utility
0Cited by
11References
13Claims
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Key dates
| Filing date | Jul 9, 2002 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Jul 9, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Foamed and expanded beads including a polyester-based resin containing at least 35 mole % of an aliphatic ester component. The foamed beads have a gel fraction of at least 5 % by weight and comprises at least one gel accelerating agent selected from fatty acids having 12-25 carbon atoms, metal salts of the fatty acids, esters of the fatty acids and amides of the fatty acids in an amount of 0.15-3 % by weight. A foam molding is obtained by heating the foamed and expanded beads in a mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.