High performance pressure sensitive adhesive emulsion
AssigneeAir Products and Chemicals, Inc.
InventorsTze-Chiang Cheng, Chung-Ling Mao
Life of this patent
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Abstract
A pressure sensitive adhesive composition comprising an aqueous emulsion of a copolymer consisting essentially of (a) 10-40 wt % vinyl acetate, (b) 5-30 wt % ethylene, (c) 5-50 wt % alkyl acrylate, (d) 5-40 wt % dialkyl maleate or fumarate, (e) 1-5 wt % hydroxyalkyl (meth)acrylate, (f) 0.1-1 wt % (meth)acrylamide, and (g) 1-5 wt % alpha,beta ethylenically unsaturated carboxylic acid.
Claims12
A pressure sensitive adhesive composition comprising an aqueous emulsion of a copolymer having a Tg of less than about -20.degree. C. consisting essentially of
- (a) 10-40 wt % vinyl acetate,
- (b) 5-30 wt % ethylene,
- (c) 5-50 wt % alkyl acrylate,
- (d) 5-40 wt % dialkyl maleate or fumarate,
- (e) 1-5 wt % 2-hydroxyalkyl (meth)acrylate,
- (f) 0.1-1 wt % (meth)acrylamide, and
- (g) 1-5 wt % alpha,beta ethylenically unsaturated carboxylic acid.
A pressure sensitive adhesive composition comprising an aqueous emulsion of a copolymer having a Tg of less than about -20.degree. C. consisting essentially of
- (a) 10 to 30 wt % vinyl acetate,
- (b) 8 to 20 wt % ethylene,
- (c) 10 to 40 wt % C.sub.4 -C.sub.8 alkyl acrylate,
- (d) 15 to 35 wt % di-(C.sub.4 -C.sub.8) alkyl maleate
- (e) 1 to 4 wt % 2-hydroxyalkyl (meth)acrylate,
- (f) 0.1 to 0.5 wt % (meth)acrylamide, and
- (g) 1 to 4 wt % .alpha.,.beta.-ethylenically unsaturated C.sub.3 -C.sub.6 carboxylic acid.
A pressure sensitive adhesive composition comprising an aqueous emulsion of a copolymer having a Tg of -30.degree. to -70.degree. C. consisting essentially of
- (a) 10 to 30 wt % vinyl acetate,
- (b) 8 to 20 wt % ethylene,
- (c) 10 to 40 wt % 2-ethylhexyl acrylate,
- (d) 15 to 35 wt % dioctyl or dibutyl maleate,
- (e) 1 to 4 wt % 2-hydroxyethyl acrylate,
- (f) 0.1 to 0.5 wt % acrylamide, and
- (g) 1 to 4 wt % acrylic acid.
Dependencies are inferred from the claim text.