Process for making isocyanate-functional polymers containing low

Details Process for making isocyanate-functional polymers containing low Process for making isocyanate-functional polymers containing low

1983-04-13

1985-04-09

Henderson, Christopher A.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526312, C08F 610, C08F12000

Patent

active

045102988

ABSTRACT:
Disclosed is an improvement in the (co)polymerization of an isocyanate-containing monomer, e.g., an isocyanatoalkyl methacrylate, forming a product of very low residual toxic monomeric isocyanate (less than 500 ppm) useful in avoiding air pollution. The improvement consists in adding a scavenger, a small amount of an active nonpolluting monomer such as butyl acrylate, near the end of the polymerization.

REFERENCES:
patent: 2662867 (1953-12-01), Hoertz
patent: 2718516 (1955-09-01), Bortnick
patent: 3991136 (1976-11-01), Dalton
patent: 4219632 (1980-08-01), Simms
patent: 4351755 (1982-09-01), Brixius et al.

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