Reinforcing process
US4452855A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1983 |
| Grant date | Jun 5, 1984 |
| Priority date | — |
| Expiry date | Feb 11, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2738
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The adhesion of fibrous polymeric aromatic amide reinforcing material to rubber stock is improved by treating the fibrous material with an aliphatic sulfonylazide having the general formula R(Cl).sub.x (SO.sub.2 N.sub.3).sub.y, where R is an aliphatic or cycloaliphatic hydrocarbon radical containing at least 5 carbon atoms, y is from about 1 to about 4 and x is from 0 up to about 2y; heating the treated fibrous material at a temperature and for a period of time sufficient to decompose substantially all the sulfonylazide groups; then coating the resulting material with an adhesive; and finally, embedding the coated material into rubber stock which is then vulcanized. In a preferred embodiment, a fibrous material which has been treated with an aliphatic sulfonylazide conforming to the above formula and where y is greater than 1, is heated at a temperature and for a period of time sufficient to decompose only from about 35 to about 75% of the sulfonylazide groups, then the treated material is coated with an adhesive and embedded into rubber stock which is then vulcanized. Also disclosed are the vulcanized products thus produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.