Stabilization of halogenated rubber
US6448322B1 · kind B1 · utility
0Cited by
27References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1999 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | Aug 25, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L23/283
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Halogenated isobutylene-p-methylstyrene polymers are stabilized against discoloration with a weak base such as 100 to 500 ppm sodium bicarbonate. The additive is added to the rubbery polymers after dewatering in the finishing step of their manufacture. The curability of the stabilized rubbers is not adversely affected by the sodium bicarbonate additive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.