Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1993-08-25
1994-08-09
Seidleck, James J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525413, 525415, 528 80, C08L 6702, C08L 6704, C08L 7506
Patent
active
053367332
ABSTRACT:
Disclosed are polyurethane base resins, and polyurethane composites and adhesive compositions formed using the base resins. The polyurethane base resins are formed by reacting a polycarbodiimide-modified 4, 4'-diphenylmethane diisocyanate with a mixture of the following polyols: (a) a hydroxyl-terminated, linear, saturated liquid copolyester diol having a glass transition temperature of at most -10.degree. C. and at least -60.degree. C.; and (b) a homopolyester polyol that is a ring-opened polymer of a cyclic ester. The polyurethane composites include typical active hydrogen-containing species that will react with isocyanates and promote curing, in addition to the polyurethane base resin. The polyurethane adhesive compositions, which are thermosetting, include the cured polyurethane base resin, cured by exposure to moisture or any other applicable curing mechanism. The adhesive compositions have improved performance (e.g., tensile strength and adhesion) at elevated service temperatures, and are suitable for high performance automotive structural bonding applications.
REFERENCES:
patent: 4415728 (1983-11-01), Tremblay
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patent: 4814413 (1989-03-01), Thibaut et al.
patent: 4996283 (1991-02-01), Greco et al.
Magnus, G. "Poly-E-Caprolactone Based Urethanes". Rubber Age, Jul., 1965. pp. 86-93.
"Niax Caprolactone Polyols For Moisture-Cure Urethane Coatings". Product Data Sheet, Union Carbide. Oct., 1967.
"Improved Polyurethane Elastomers". Rubber Age, Mar., 1967 pp. 78-81.
Cody Charles A.
Hartman Terrence L.
Cronin Michael J.
Hamilton, III Thomas
Rheox Inc.
Seidleck James J.
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