Rubber containing matrix-antidegradants

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...

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Details

524256, 524258, 524928, 524929, C08K 518

Patent

active

050232878

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.

REFERENCES:
patent: 3073371 (1963-01-01), Leeper
patent: 3554959 (1971-01-01), Hammersley et al.
patent: 3704741 (1972-12-01), Turk
patent: 4092285 (1978-05-01), Leo et al.
patent: 4552929 (1985-11-01), Devaux et al.
Z. T. Ossefort "Ozone Resistance of Elastomeric Vulcanizates" Symposium on Effect of Ozone on Rubber pp. 39-56 Am. Society for Testing Matls. (1958).
Mascia, L. The Role of Additives in Plastics pp. 12 to 15, 1974.

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