Rubber containing microencapsulated antidegradants

Details Rubber containing microencapsulated antidegradants Rubber containing microencapsulated antidegradants

1987-10-06

1990-01-23

Kight, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524 91, 524 99, 524102, 524103, 524291, 524336, 524571, C08K 534, C08K 513

Patent

active

048958840

ABSTRACT:
There is disclosed the use of microencapsulated antidegradants in rubber and a process for the production of microencapsulated antidegradants. More specifically, this invention is directed to the cellulose acetate microencapsulation of para-phenylene diamine based antiozonants at wall to core ratios greater than 1:1 but less than 4:1. The microcapsules preferably have a particle diameter of less than 50 microns. The microencapsulated antidegradant prepared and used according to this invention provides long term protection to rubber articles that are subject to ozone and oxygen attack.

REFERENCES:
patent: 4419471 (1983-12-01), Nelsen et al.
patent: 4530880 (1985-07-01), Taniuchi et al.
patent: 4601863 (1986-07-01), Shioi et al.
Database Chemical Abstracts, (HOST:STN), 1984, No. 101 (3): 19081c, Columbus, Ohio U.S.: & JP-A-50 20 209 (HOKKO Chemical Industry Co., Ltd.) 01-02-1984.
Database WPIL, No. 87-105752, Derwent Publications Ltd., London GB; & JP-A-62 053 786 (Asahi Chemical Ind. K.K.) 09-03-1987.

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