Sprayable nonionic neoprene latex adhesive and method of preparation
AssigneeCJ's Distributing, Inc.
InventorDavid W. Carnahan
Life of this patent
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Abstract
A sprayable adhesive based on nonionic neoprene latex includes in the adhesive mixture a nonionic surfactant, along with the latex, which is a copolymer of chloroprene and methacrylic acid stabilized with polyvinyl alcohol. The adhesive also includes a tackifier, zinc oxide, and an antioxidant. The tackifier is a petroleum-derived hydrocarbon resin, and the antioxidant is a hindered bis-phenol. In order to obtain a rapid drying adhesive, only the latex and surfactant are mixed as liquids. The remaining ingredients are added in solid form and dispersed by mixing under high shear. The adhesive can be applied by spraying from a canister using dimethyl ether as a propellant.
Claims19
A sprayable adhesive composition comprising:
- an aqueous dispersion of the following components on a dry weight basis:
- a nonionic neoprene latex consisting of a copolymer of chloroprene and methacrylic acid dispersed and stabilized with polyvinyl alcohol - 100 parts;
- a tackifier - 10 to 50 parts;
- zinc oxide unreacted with a caustic material - 1 to 10 parts;
- an antioxidant - 1 to 3 parts;
- and
- a nonionic surfactant - 0.5 to 3 parts;
- and
- said composition being free of coalescence aids and thickeners.
An aerosol sprayable mixture adapted to be disposed in a pressurized aerosol spray canister comprising:
- a nonionic neoprene latex consisting of a copolymer of chloroprene and methacrylic acid dispersed and stabilized with polyvinyl alcohol - 100 parts;
- a tackifier - 10 to 50 parts;
- zinc oxide unreacted with a caustic material - 1 to 10 parts;
- an antioxidant--1 to 3 parts;
- a nonionic surfactant - 0.5 to 3 parts;
- and
- an effective amount of dimethyl ether propellant;
- said composition being free of coalescence aids and thickeners.
The method of preparing a sprayable nonionic neoprene latex adhesive characterized by rapid drying capability which comprises:
- mixing an aqueous dispersion of a nonionic neoprene latex having a water content not exceeding about 55 percent with a liquid nonionic surfactant at a proportion of 1 to 3 parts of said surfactant per 100 parts of said latex on a dry weight basis;
- adding to the resulting mixture in dry solid form a tackifier at a proportion of 10 to 50 parts, zinc oxide at a proportion of 1 to 10 parts, an antioxidant at a proportion of 1 to 3 parts, all with respect to 100 parts of said latex;
- and
- mixing the combined liquid dispersion and solids under high shear conditions until the solids are fully dispersed therein.
An aerosol sprayable mixture adapted to be disposed in an aerosol spray canister consisting of:
- a nonionic neoprene latex consisting of a copolymer of chloroprene and methacrylic acid in an aqueous dispersion and stabilized with polyvinyl alcohol - 100 parts, on a day weight basis;
- a tackifier - 10 to 50 parts;
- zinc oxide - 1 to 10 parts;
- an antioxidant - 1 to 3 parts;
- a nonionic surfactant - 0.5 to 3 parts;
- a small amount of an antimicrobial agent;
- and an effective amount of dimethyl ether propellant.
Dependencies are inferred from the claim text.