Urethane foam system for molded articles
AssigneeJones & Vining, Incorporated
InventorRichard L. House
Life of this patent
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Abstract
The technology relates to a process for the production of a soft, viscoelastic polyurethane foam system. The process includes forming a reaction mixture the includes a resin blend and at least one isocyanate. The resin blend includes at least one polyol and a catalyst blend. The catalyst blend includes between about 0.5% to about 1.5% of a mixture of 1,4-butanediol and triethylene diamine and between about 0.005% to about 0.25% of bis (2-dimethylaminoethyl) ether. The process also includes mixing the resin blend and the at least one isocyanate at a ratio of between about 18 to about 32 parts of the at least one isocyanate to about 100 parts resin blend.
Claims9
A process for the production of a soft, viscoelastic polyurethane foam system, comprising:
- (a) forming a reaction mixture comprising
- a resin blend comprising
- at least one polyol;
- a catalyst blend consisting essentially of
- between 0.5% to 1.5% of a mixture of 1,4-butanediol and triethylene diamine;
- and
- between 0.005% to 0.25% of bis (2-dimethylaminoethyl) ether;
- and
- at least one isocyanate;
- and
- (b) mixing the resin blend and the at least one isocyanate at a ratio of between 18 to 32 parts of the at least one isocyanate to 100 parts resin blend.
A process for the production of a soft, viscoelastic polyurethane foam system, comprising:
- (a) forming a reaction mixture comprising
- a resin blend comprising
- a polyols blend consisting essentially of
- between 53% to 80% of a 1400 molecular weight glycerine initiated PO/EO trifunctional polyol with hydroxyl number between 25 to 45;
- between 9% to 22% of a 400 molecular weight glycerine initiated PO trifunctional polyol with a hydroxyl number between 300 to 500;
- and
- between 9% and 22% of a ACN/SN initiated graft polyol with a hydroxyl number between 20 to 30 and a solid content between 20% to 50%;
- and
- a catalyst blend consisting essentially of
- between 0.5% to 1.5% of a mixture of 1,4-butanediol and triethylene diamine;
- and
- between 0.005% to 0.25% of bis (2-dimethylaminoethyl) ether;
- and
- an isocyanate blend consisting essentially of
- between 40% to 60% of a polyester-based prepolymer with an NCO content between 16% to 20% with a functionality of 2.0;
- and
- between 40% to 60% of a polymeric MDI with an NCO content between 28% to 34% with a functionality of 2.7;
- and
- (b) reacting the reaction mixture under suitable conditions to form a polyurethane foam system.
Dependencies are inferred from the claim text.