Sealing fiber reinforced plastics

Details Sealing fiber reinforced plastics Sealing fiber reinforced plastics

C - Chemistry, Metallurgy

08

L

400/1, 400/4201,

C08L 63/10 (2006.01) C08G 18/40 (2006.01) C08G 18/64 (2006.01) C08G 18/80 (2006.01) C08G 59/16 (2006.01) C08G 63/181 (2006.01) C09D 163/10 (2006.01) C09D 167/02 (2006.01)

Patent

CA 1242829

SEALING FIBER REINFORCED PLASTICS ABSTRACT High solids thermosetting organic solvent solution coating compositions are disclosed which are particular- ly 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 Z4 measured im methyl ethyl ketone at 90% solids at 25°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 monocarboxyl- ic fatty acid to provide an essentially epoxy-free ester having a Gardner bubble viscosity less than Z4 at 75% solids in xylol at 25°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.

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