Low temperature process for the preparation of isopropenyl-alpha

Details Low temperature process for the preparation of isopropenyl-alpha Low temperature process for the preparation of isopropenyl-alpha

1990-11-02

1994-05-24

Michl, Paul R.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525 69, 525 77, 525173, 525278, 524458, 524507, 526223, 526310, C08F26500, C08F26700

Patent

active

053149645

ABSTRACT:
A process for the preparation of novel grafted latexes having backbones formed from unsaturated monomers and having pendent isocyanate containing sidechains derived from isopropenyl-alpha, alpha- dimethylbenzyl isocyanate or copolymers thereof is described.
Grafting latexes is carried out using a free radical redox initiator system in an aqueous medium. Latexes such as polybutadiene, polyvinyl chloride, and polyvinyl chloride-acrylic copolymers are converted to the corresponding isocyanate-functional latexes by the process of the invention. The isocyanate-functional grafted and cografted latexes described are useful in curable compositions.

REFERENCES:
patent: 4579911 (1986-04-01), D'Sidocky
patent: 4694057 (1987-09-01), Smith et al.
patent: 4766185 (1988-08-01), Ryntz
patent: 4839230 (1989-06-01), Cook
patent: 5164453 (1992-11-01), Fisher et al.
"Redox Initiation", Principles of Polymerization, George Odian, 2nd Ed., pp. 201 and 682, John Wiley & Sons, 1981.
"Plastics Technology", Nov. 1989, p. #13.
"Modern Plastics", Dec. 1989, p. 16.

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