Heat-superstabilized semi-finished products containing thermoplastics resin
US4935290A · kind A · utility
1Cited by
7References
12Claims
0Family size
Inventors
Key dates
| Filing date | Aug 18, 1987 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Aug 18, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31931
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
This heat-superstabilized semi-finished product containing thermoplastic resin is constituted of at least two layers: at least one surface layer S designed to be exposed to a source of heat and at least one other layer C which is not directly exposed to said source of heat, said layer S having an overall content by weight of stabilizer which is between 3 and 30 times greater than that of layer C, and said layer S having a surface density between 50 and 600 g.m..sup.-2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.