Method for devulcanizing rubber with an amine

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Process of treating scrap or waste product containing solid...

Reexamination Certificate

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C521S040000, C521S040500, C521S042000

Reexamination Certificate

active

06956065

ABSTRACT:
The invention relates to a method for devulcanizing a sulphur-cured rubber, which rubber contains a network of a polymer, which polymer has a main chain of carbon atoms, in which for the vulcanization per 40 carbon-carbon bonds in the main chain a maximum of 1 unsaturated carbon-carbon bond occurs, by heating the rubber in the presence of a devulcanizing agent. The devulcanizing agent is an amine compound.

REFERENCES:
patent: 2304550 (1942-12-01), Dasher
patent: 2478826 (1949-08-01), Johnson et al.
patent: 4211676 (1980-07-01), Watabe et al.
patent: 5672630 (1997-09-01), Mouri et al.
patent: 6077874 (2000-06-01), Wideman et al.
patent: 1244390 (1968-01-01), None
patent: 605588 (1945-12-01), None
Patent Abstracts of Japan, English Abstract of JP 53-024322, published Sep. 12, 1979.
Furukawa et al., “Properties of old tyre rubber, and various factors that dominate the properties of regenerated rubber”, International Polymer Science and Technology, vol. 53, No. 8, 1980, pp. 32-37.

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