Coating liquid composition to form hard coat film on plastics

Details Coating liquid composition to form hard coat film on plastics Coating liquid composition to form hard coat film on plastics

1987-03-24

1990-02-13

Ivy, C. Warren

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...

524752, 524767, 524863, C08L 8306

Patent

active

049007785

ABSTRACT:
The invention relates to a coating liquid composition useful to form a hard and transparent coating film on plastics. The novel liquid composition comprises a partial polycondensation product of a trialkoxysilane R.sup.1 Si(OR.sup.2).sub.3, wherein R.sup.1 is a C.sub.1 or C.sub.2 alkyl group and R.sup.2 is a C.sub.1 -C.sub.3 alkyl group, a colloidal silica, water, an aliphatic lower alcohol and anhydride of a polybasic carboxylic acid having a cyclic structure. The content of the acid anhydride must be at least 0.005 wt % when pH of the coating liquid composition is adjusted to 6.0-7.0. The primary merit of using such an acid anhydride is improved storage stability of the coating liquid composition.

REFERENCES:
patent: 4373061 (1983-02-01), Ching
patent: 4476281 (1984-10-01), Vaughn
patent: 4486503 (1984-12-01), Vaughn
patent: 4500669 (1985-02-01), Ashlock
patent: 4559271 (1985-12-01), Doin

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