Rubber composition
US4665119A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 10, 1986 |
| Grant date | May 12, 1987 |
| Priority date | — |
| Expiry date | Apr 10, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/098
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A rubber composition in which a metal salt between a resin acid and cobalt is blended in a content of from 0.05 to 0.7 part by weight in terms of the content of a metal element with respect to 100 parts by weight of rubber containing not less than 70% by weight of at least one rubber of natural rubber and a synthetic polyisoprene rubber; as the metal salt is used a cobalt resinate which has a melting point in a range of 140.degree. to 180.degree. C., an oxidation degree of not more than 60% in a gas chromatography (GLC), and not more than 2,000 ppm of a sulfur concentration in the metal salt; when the metal salt is divided into a dissolved portion and an undissolved portion by using toluene and water, the undissolved portion in both toluene and water has a characteristic absorption of around 3,600 cm.sup.-1 in an infrared absorption spectrum (IR); and when elevated in temperature at a rate of 5.degree. C./min. in a differential scanning calorimeter (DSC), the cobalt resinate has endothermic peaks in ranges of 250.degree. to 350.degree. C. and 300.degree. to 420.degree. C., respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.