Polyester based patching composition
OwnerArthur William Holleinventor
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Abstract
Patching compositions suitable for repairing imperfections in metal surfaces, and particularly dented automobile bodies, are prepared from thermosetting unsaturated polyester resins having incorporated therein a minor amount of inorganic hollow microspheres and a major amount of a filler admixture containing silica and an alkaline inorganic powder having a pH greater than 7.
Claims14
A thermosetting patching composition for the filling of dents, holes and similar imperfections in metal surfaces comprised of ( 1) about 35 to about 55 percent by weight of a binder component comprised of a mixture of an unsaturated polyester resin and a vinylidene monomer solvent copolymerizable with the polyester;
- (2) about 35 to about 55 percent by weight of a filler component comprised of an admixture of silica and an alkaline inorganic powder having a pH greater than 7, the silica and the alkaline inorganic powder being present at a weight ratio ranging from 1:3 to 3:1 and (3) about 3 to about 10 percent by weight of inorganic hollow microspheres.
Dependencies are inferred from the claim text.