Styrene-based materials for hot melt adhesives
AssigneeBostik SA
InventorsSteven D. Gray, Darius K. Deak, Brian R. Minix, Edward P. Tomlinson
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Abstract
A hot melt adhesive comprises at least one polymer selected from the group consisting of polystyrene, polybutene, polyisobutene, linear low density polyethylene, polypropylene random copolymer, polypropylene, olefin block copolymer, polyolefins, styrene block copolymers, and ethyl vinyl acetate polymers; a tackifying resin; and at least one precisely end-capped polystyrene (PECPS). The use of the styrene-based oligomers and polymers with the precisely controlled end-groups in hot melt adhesive formulations to improve compatibility with polymers and block copolymers frequently used in such adhesives.
Claims11
A hot melt adhesive composition comprising:
- a) about 2% to about 98% by weight of at least one polymer selected from the group consisting of polystyrene, polybutene, polyisobutene, linear low density polyethylene, polypropylene random copolymer, polypropylene, olefin block copolymer, polyolefins, styrene block copolymers, and ethyl vinyl acetate polymers;
- b) 0% to about 80% by weight of a tackifying resin;
- and
- c) about 2% to about 98% by weight of at least one precisely end-capped polystyrene (PECPS) having a formula of:
- produced by the reaction below
- wherein n is from 2 to 20, and R is selected from the group consisting of:
Dependencies are inferred from the claim text.