Process for preparing polyhydroxystyrene derivatives

Details Process for preparing polyhydroxystyrene derivatives Process for preparing polyhydroxystyrene derivatives

1997-05-30

1999-07-20

Lipman, Bernard

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

Synthetic resins

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

5253288, 525383, 525386, C08F 818

Patent

active

059257180

ABSTRACT:
The present invention provides a process for preparing a polyhydroxystyrene derivative, comprising adding polyhydroxystyrene to an alkaline alcohol solution to form a homogeneous polyhydroxystyrene solution; and reacting the polyhydroxystyrene solution with an ester to obtain the polyhydroxystyrene derivative. The obtained polyhydroxystyrene derivative is suitable for use as the resin component of a photoresist.

REFERENCES:
patent: 3879328 (1975-04-01), Jones
patent: 4775730 (1988-10-01), Gupta
patent: 5015558 (1991-05-01), Ochi et al.

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