Hot melt adhesive compositions
AssigneeExxon Research & Engineering Co.
InventorsPawan K. Agarwal, Warren A. Thaler
Life of this patent
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Abstract
This invention relates to hot melt adhesive compositions which include a neutralized EPDM terpolymer which has about 5 to about 50 meq. of neutralized sulfonate groups per 100 grams of the neutralized sulfonated elastomeric EPDM terpolymer, a neutralized sulfonated 1,2-syndiotactic polybutadiene resin which has about 5 to about 50 meq. of neutralized sulfonate groups per 100 grams of the neutralized sulfonated polybutadiene, and about 25 to about 250 parts by weight of a hydrocarbon resin of a petroleum or coal tar distillate having about 5 to about 6 carbon atoms the hydrocarbon resin being composed of aliphatic dienes and monoolefins per 100 parts by weight of the neutralized sulfonated EPDM terpolymer.
Claims11
A hot melt adhesive composition which comprises:
- (a) a neutralized sulfonated EPDM terpolymer having about 5 to about 50 meq. of neutralized sulfonated groups per 100 grams of said neutralized sulfonated EPDM terpolymer;
- (b) about 25 to about 250 parts by weight of a hydrocarbon resin of a petroleum or coal tar distillate per 100 parts by weight of said neutralized sulfonated EPDM terpolymer;
- and
- (c) about 25 to about 250 parts by weight of a neutralized sulfonated 1,2-syndiotactic polybutadiene resin per 100 parts of said sulfonated EPDM terpolymer, said sulfonated 1,2-syndiotactic polybutadiene resin having about 5 to about 50 meq. of neutralized sulfonate groups per 100 grams of said neutralized sulfonated 1,2-syndiotactic polybutadiene resin.
A hot melt adhesive composition according to claim 2, wherein said sulfonated EPDM terpolymer is derived from an EPDM terpolymer having about 40 to about 65 weight percent of ethylene, of about 25 to about 53 weight percent of propylene and of about 2 to about 10 weight percent of a nonconjugated diene.
A hot melt adhesive composition according to claim 4, wherein said neutralized sulfonate groups of said sulfonated EPDM terpolymer are neutralized with a counterion selected from the group consisting of ammonium, aluminum, antimony, iron, lead and Groups IA, IIA, IB and IIB of the Periodic Table of Elements.
A hot melt adhesive composition according to claim 5, wherein said neutralized sulfonate groups of said sulfonated EPDM terpolymer are neutralized with zinc ions.
Dependencies are inferred from the claim text.