Soft and low-density foam materials from modified copolymers of ethylene with vinyl acetate and/or alkyl acid
US4946871A · kind A · utility
5Cited by
7References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1989 |
| Grant date | Aug 7, 1990 |
| Priority date | — |
| Expiry date | Dec 19, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2323/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Soft and low-density foam materials, obtained by means of an extrusion expansion (with physical blowing agents) of particular copolymers of ethylene with vinylacetate (and/or with alkyl esters of acrylic or methacrylic acid), are found to be very suitable for the manufacture of expanded articles with little shrinkage after expansion, free from creases on the surface or cracks on the cell walls, and having excellent characteristics, higher compressive strength and so on.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.