Hot melt sealants

Chemistry of carbon compounds – Miscellaneous organic carbon compounds

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Details

260 285AS, 260 285B, 260 306R, 260 318DR, 260 336A, 260 336AQ, 260 338UA, 260 4247, 525 92, 525108, 525109, 525120, 525121, 525122, C08L 9300

Patent

active

041698223

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: 3325430 (1967-06-01), Grasley
patent: 3500603 (1970-03-01), Strack
patent: 3551517 (1970-12-01), Dowbenko et al.

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