Preventing discoloration in an elastomer rubber
US6653386B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2001 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Dec 7, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2312/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing a vulcanized elastomeric rubber composition that minimizes or eliminates the appearance of discoloration on the surface of the rubber, and the products formed from this process are disclosed. The process includes the incorporation of polar functional groups into the elastomeric rubber by grafting the functional groups onto a compound miscible in the rubber. It is believed that the polar functional groups increase the solubility of the compounds responsible for iridescence and blooming observed in vulcanized rubber and decrease their migration to the rubber surface. Additional techniques for reducing or eliminating undesirable discoloration in rubber are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.