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US 4,540,731 AGranted
Low temperature cure sealant
AssigneeNiles Chemical Paint Co.
InventorsJohn P. Gilvary, John V. Lawton
Life of this patent
Estimating the term…
Abstract
A vinyl plastisol sealant which is formed from a mixture of a dispersion resin, a blending resin, a solution-grade resin, a plasticizer, a filler and a silane adhesion promoter. The solution-grade resin is first predissolved in the plasticizer, and then mixed with the other components to produce a plastisol sealant which cures at a relatively low temperature.
Claims9
A composition for a sealant paste with a low cure temperature comprising, in parts by weight:
- from 10 to 100 parts of vinyl chloride/vinyl acetate copolymer dispersion resin having an inherent viscosity in excess of 0.9 when measured at 30.degree. C. using 2 grams of resin and 100 ml. of cyclohexane;
- from 10 to 100 parts of a blending resin, being one of vinyl chloride homopolymer and vinyl chloride/vinyl acetate;
- from 10 to 100 parts of a solution of vinyl chloride/vinyl acetate solution grade resin, said solution grade resin being essentially free from products of ketone-aldehyde condensation, and a plasticizer wherein said vinyl acetate composes 9-11 percent of said resin and the ratio of said resin is from 1:10 to 1:100 parts of said plasticizer;
- from 10 to 350 parts of a filler of one of an alkaline earth metal carbonate, a sulfate, and a platy talc filler;
- from 0.25 to 5 parts of a silane adhesion promoter having an organo-functional trihydrolyzable silane wherein said organo-functional group is bonded to silicon by a carbon-to-silicon bond and the organo-functional group is an NH.sub.2 group.
2 more elements
A composition for a sealant past with a low cure temperature consisting essentially of:
- a blending resin from 10-100 parts by weight;
- a disperson resin from 10-100 parts by weight;
- a dessicant from 5-50 parts by weight;
- a filler from 10-350 parts by weight;
- a thixiotrope from 2 to 45 parts by weight;
- a plasticizer from 30 to 100 parts by weight;
- a solution grade resin, said solution grade resin being essentially free from products of ketone-aldehyde resin condensation from 0.55 to 5.5 parts by weight predisolved in said plasticizer;
- a stabilizer from 0.5 to 4 parts by weight;
- and
- a silane adhesion promoter from 0.25 to 5 parts by weight.
7 more elements
Dependencies are inferred from the claim text.