Polyfunctional isocyanates free of alkali and urea groups

Details Polyfunctional isocyanates free of alkali and urea groups Polyfunctional isocyanates free of alkali and urea groups

1980-03-13

1981-11-17

Torrence, Dolph H.

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

Synthetic resins

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

260453P, 525336, 525358, 5263077, 5263078, 528 44, 528 75, C08F 800, C08F 822, C08F 830, C08F 1872

Patent

active

043012574

ABSTRACT:
This invention relates to a polyfunctional isocyanate which is an acrylamide or methacrylamide homopolymer or interpolymer having 20 to 100% of its secondary .alpha. and tertiary .alpha. carbon atom amide groups converted to isocyanate groups, said polyfunctional isocyanate being free of alkali and urea groups.
The polyfunctional isocyanates are prepared by reacting the N-chloramide derivative of the acrylamide or methacrylamide polymer, in an inert solvent, with a tertiary amine having a pK.sub.a value of more than 7.
The polyfunctional isocyanates are useful for forming coating compositions.

REFERENCES:
patent: 3483242 (1969-12-01), Brownstein et al.
patent: 3929744 (1975-12-01), Wright et al.
Wright et al., Journal of Applied Polymer Science, vol. 20, pp. 3305-3311 (1976).

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