Polymer with reduced internal migration
US4902378A · kind A · utility
32Cited by
19References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1988 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | Apr 27, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2327/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Semicrystalline polymers and copolymers having migratory additives therein can be provided with reduced migration. A surface layer of the polymer of copolymer article is rendered quasi-amorphous and a film less penetrable by said migratory additives than the polymer or copolymer is adhered thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.