Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1987-11-05
1991-06-11
Hoke, Veronica P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
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.
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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.
Benko David A.
Evans Larry R.
Harris Frank W.
Waddell Walter H.
Hendricks Bruce J.
Hoke Veronica P.
Nickey D. O.
The Goodyear Tire & Rubber Company
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