Rubber containing matrix-antidegradants
US5023287A · kind A · utility
6Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1987 |
| Grant date | Jun 11, 1991 |
| Priority date | — |
| Expiry date | Nov 5, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S524/929
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
There is disclosed the use of matrix-antidegradants in rubber and a process for the production of matrix-antidegradants. More specifically, this invention is directed to microparticles of vulcanized rubber containing high levels of para-phenylenediamine type antiozonants which have a particle diameter of 100 microns or less. The matrix-antidegradant or microparticles prepared according to this invention provide long term protection to rubber articles that are subject to ozone and oxygen attack.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.