EP0338724A2
Expired / Lapsed
EP
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Pressure-sensitive adhesive
Assignee: 3M Co
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Filing: 1989-04-13
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Granted: —
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Expires: 2009-04-13
Abstract
Abstract Acrylic pressure-sensitive adhesive that is especially suited for adhering to plasticized PVC and similar substrates. The adhesive comprises 50-99% butyl acrylate, 0-49% copolymerizable vinyl compound, 1-20% α-β ethylenically unsaturated carboxylic acid, a crosslinker, and preferably up to 50% of a tackifier.
Inventors
- 👤 Makoto C/O Minnesota Mining And Sasaki
- 👤 Ken C/O Minnesota Mining And Egashira
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 12:36
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6216; C09; C09J; C09J175/00; C08G2170/00; C08G2170/40; C08L; C08L2666/00; C08L2666/02; C08L2666/26
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
76 words
A pressure-sensitive adhesive that adheres well to plasticized polyvinyl chloride and similar plasticized polymeric substrates, even after extensive aging, comprising an acrylic copolymer having a weight average molecular weight of more than 600,000, the monomer components of said copolymer comprising 50-99 weight % butyl acrylate, 0-49 weight % of at least one copolymerizable vinyl compound, 1-20 weight % α,β-unsaturated carboxylic acid, and sufficient isocyanate crosslinking agent to crosslink 10-60% of the polar groups in the copolymer.
Claim 2
Dependent Claim
76 words
A pressure-sensitive adhesive that adheres well to plasticized polyvinyl chloride and similar plasticized polymeric substrates, even after extensive aging, comprising an acrylic copolymer having a weight average molecular weight of more than 600,000, the monomer components of said copolymer comprising 50-99 weight % butyl acrylate, 0-49 weight % of at least one copolymerizable vinyl compound, 1-20 weight % α,β-unsaturated carboxylic acid, and sufficient isocyanate crosslinking agent to crosslink 10-60% of the polar groups in the copolymer.
Claim 3
Dependent Claim
16 words
The pressure-sensitive adhesive of claim 1 wherein the molecular weight of the acrylic copolymer is 800,000-900,000.
Claim 4
Dependent Claim
17 words
The pressure-sensitive adhesive of claim 1 or 2 wherein the copolymer contains 70-95 weight percent butyl acrylate.
Claim 5
Dependent Claim
17 words
The pressure-sensitive adhesive of any preceding claim wherein the copolymer contains 10-37 weight percent copolymerizable vinyl compound.
Claim 6
Dependent Claim
22 words
The pressure-sensitive adhesive of any preceding claim wherein sufficient isocyanate is present to crosslink 30-50% of the polar groups in the copolymer.
Claim 7
Dependent Claim
23 words
The pressure-sensitive adhesive of any preceding claim wherein the adhesive contains up to 50 weight percent, based on the copolymer, of a tackifier.
Claim 8
Dependent Claim
18 words
The pressure-sensitive adhesive of claim 6 wherein the adhesive contains up to 20 weight percent of the tackifier.
Claim 9
Dependent Claim
13 words
The pressure-sensitive adhesive of claim 7 wherein the tackifier is a rosin ester.
References Cited (Backward Citations)
No citation records indexed.
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