Radiation-curable phenoxy resins, production thereof, and electr

Details Radiation-curable phenoxy resins, production thereof, and electr Radiation-curable phenoxy resins, production thereof, and electr

1988-04-25

1989-04-04

Welsh, Maurice J.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524431, 524779, 524785, 525523, 528 69, C08G 1804

Patent

active

048187801

ABSTRACT:
The reaction product of an adduct of an ethylenically unsaturated monohydric alcohol, such as 2-hydroxyethyl acrylate, with an organic diisocyanate in which one of the two isocyanate groups is more strongly reactive than the other, such as isophorone diisocyanate, is reacted with a phenoxy resin in solvent solution. The alcohol is used in a molar excess of at least about 3% up to 30% to insure the absence of any significant proportion of unreacted diisocyanate. The phenoxy resin which is reacted with is a high molecular weight hydroxy functional polyether having a number average molecular weight above 10,000 and an hydroxy functionality in the range of from about 20 to about 300. The adduct is used in an amount to introduce about 1.5 to about 20 ethylenically unsaturated groups per molecule of the polyether, and the reaction is continued to substantially eliminate unreacted isocyanate functionality. These unsaturated products are useful in electron beam coating compositions, especially in combination with unsaturated liquids which lower the glass transition temperature. They can also be used in combination with acrylate-terminated polyurethanes to provide films having greater handleability prior to cure.

REFERENCES:
patent: 4246391 (1981-01-01), Watson

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