Polyurethane foam game ball, composition and process
AssigneeAtlantic Richfield Company
InventorsJohn R. Murphy, John S. Babiec, Jr., Joseph A. Meyers
Life of this patent
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Abstract
An improved game ball is manufactured from a polyurethane foam prepared from a hydroxyl-containing diene polymer, a catalyst system comprised of a tin compound and a tertiary amine and a surfactant system comprised of a non-hydrolyzable silicone-polyether copolymer and a polydialkylsiloxane.
Claims10
In a game ball comprised of a polyurethane foam sphere, the improvement comprising using as the polyurethane foam sphere a foam manufactured from a formulation comprising a liquid diene polymer having a molecular weight of about 500 to 5000 and 1.8 to 3 hydroxyl groups per molecule;
- a polyfunctional isocyanate containing 2 to 2.7 isocyanate groups per molecule;
- water;
- a first catalyst selected from dialkyl stannic diester, stannous diesters and mixtures of these;
- a second catalyst selected from tertiary amines;
- a first surfactant which is a non-hydrolyzable silicone-polyether copolymer and a second surfactant comprising at least one dialkylpolysiloxane.
In a game ball comprised of a polyurethane foam sphere, the improvement comprising producing said polyurethane foam sphere from a formulation comprising as the essential components:
- (a) 100 parts of a polyol component at least 50% by weight of which a hydroxyl-containing butadiene polymer having a molecular weight of about 1000 to 5000 and about 2.1 to 2.8 hydroxyl groups per molecule,
- (b) 0.02 to 0.21 part of a tin catalyst effective for initiating urethane reaction,
- (c) 0.03 to 0.14 part of a tertiary amine,
- (d) 0.10 to 1.1 parts of a non-hydrolyzable silicone-polyether copolymer,
- (e) 0.10 to 1.5 part of a dialkylpolysiloxane,
- (f) 1.0 to 3.0 parts of water, and sufficient polyisocyante having a functionality of about 2.0 to 2.7 to provide an isocyanate to total hydroxyl group equivalents ratio of about 1.0 to 1.6.
In a method of manufacturing a spherical sports ball comprising injecting a polyurethane forming formulation into a closed mold having the desired configuration and causing the formulation to react and cure to a firm polyurethane foam, the improvement comprising preparing the polyurethane foam from a formulation comprised a liquid diene polymer having a molecular weight of about 500 to 5000 and 1.8 to 3 hydroxyl groups per molecule;
- a polyfunctional isocyanate containing 2 to 2.7 isocyanate groups per molecule;
- water;
- a first catalyt selected from dialkyl stannic diesters, stannous diesters and mixtures of these;
- a second catalyst selected from tertiary amines;
- a first surfactant which is a nonhydrolyzable silicone-polyether compolymer and a second surfactant comprising at least one dialkylpolysiloxane.
In a process for manufacturing a spherical game ball comprising injecting a polyurethane forming formulation into a closed mold having the desired configuration and causing the formulation to react and cure to form the polyurethane foam, the improvement comprising using as the essential components;
- (a) 100 parts of a polyol component at least 50% by weight of which a hydroxyl-containing butadiene polymer having a molecular weight of about 1000 to 5000 and about 2.1 to 2.8 hydroxyl groups per molecular,
- (b) 0.02 to 0.21 part of a tin catalyst effective for initiating urethane reaction,
- (c) 0.03 to 0.14 part of a tertiary amine,
- (d) 0.10 to 1.1 parts of a non-hydrolyzable silicone-polyether copolymer,
- (e) 0.10 to 1.5 parts of a dialkylpolysiloxane,
- (f) 1.0 to 3.0 parts of water, and sufficient polyisocyante having a functionality of about 2.0 to 2.7 to provide an isocyanate to total hydroxyl group equivalents ratio of about 1.0 to 1.6.
Dependencies are inferred from the claim text.