Thermosetting coating compositions for the sealing of fiber rein

Details Thermosetting coating compositions for the sealing of fiber rein Thermosetting coating compositions for the sealing of fiber rein

1983-07-18

1985-07-02

Pertilla, Theodore E.

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

Synthetic resins

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

428413, 428417, 428480, 525454, 525481, 525488, 525510, 525514, 525533, 525922, C08L 6702

Patent

active

045269394

ABSTRACT:
High solids thermosetting organic solvent solution coating compositions are disclosed which are particularly useful for sealing the pores in fiber reinforced plastics. These compositions contain a mixture of resins comprising (1) from 30% to 70% of one or more hydroxy functional resins having a number average molecular weight of at least about 700, a Gardner bubble viscosity less than about Z.sub.4 measured in methyl ethyl ketone at 90% solids at 25.degree. C., and at least 5% of the hydroxy groups thereof being primary hydroxy groups, (2) from 10% to 70% of low molecular weight epoxy ester made by esterifying one or more resinous polyepoxides having a 1,2-epoxy equivalency of at least 1.2 with an approximately stoichiometric proportion of monocarboxylic fatty acid to provide an essentially epoxy-free ester having a Gardner bubble viscosity less than Z.sub.4 at 75% solids in xylol at 25.degree. C., and (3) the balance of the mixture, but not less than 15% thereof, being a curing agent having a plurality of groups reactive with the hydroxy groups in the hydroxy resin and in the epoxy ester.

REFERENCES:
patent: 3291858 (1966-12-01), Oosterhof
patent: 4316940 (1982-02-01), Thornley
patent: 4362847 (1982-12-01), Kooijmans et al.

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