Urethane containing hot melt sealants, adhesives and the like

Details Urethane containing hot melt sealants, adhesives and the like Urethane containing hot melt sealants, adhesives and the like

1975-10-29

1976-11-09

Jacobs, Lewis T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 28R, 260 285AV, 260 306R, 260 312R, 260 312N, 260 318R, 260 318M, 260 336UB, 260 338UB, C08L 9300

Patent

active

039910253

ABSTRACT:
Solvent-free hot melt compositions for use as sealants, adhesives, caulking compounds or the like are produced by intimately blending elastomeric polymers with tackifying resins and plasticizers to obtain products having a hardness at room temperature of at least about 5 on the Shore A Durometer scale while being sufficiently soft at temperatures of about 150.degree. F or higher to permit them to be easily extruded or otherwise applied. Adhesion promoters, lubricants, fillers and the like are preferably added to the composition to improve the properties thereof. The products are characterized by their stability over a wide range of temperatures, their resistance to oxidation and weathering, and their low moisture vapor transmission properties.

REFERENCES:
patent: 3437622 (1969-04-01), Dahl
patent: 3551517 (1970-12-01), Dowbenko et al.

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