Rigid thermoplastic resin foam and process for preparation thereof
US4585605A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1985 |
| Grant date | Apr 29, 1986 |
| Priority date | — |
| Expiry date | Sep 25, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/918
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The foam of the present invention, which has a multi-cellular structure including many wrinkles having one end in the boundary portion where at least three cells are adjacent to one another and extending toward the central portion of the cell wall, is a rigid thermoplastic resin foam having an ultra-low density, a high sound-insulating property, a high heat-insulating property and a high flexibility, and it is suitable for adaption for building construction. The process of the present invention is to provide the aforesaid foam of the present invention by subjecting the foam of a rigid thermoplastic resin to expansion, contraction and aging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.