Patent EP0180434A2 successfully refreshed from Google Patents.
EP0180434A2
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EP
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Removable pressure-sensitive adhesive tape
Assignee: 3M Co
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Filing: 1985-10-28
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Granted: —
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Expires: 2005-10-28
Abstract
Abstract 57 The adhesive layer of the novel pressure-sensitive adhesive tape comprises a polymer of a terminally unsaturated vinyl monomer such as isooctyl acrylate and an emulsifier monomer such as sodium styrene sulfonate. Preferably, the adhesive layer also contains a small amount of a noncationic external emul- sifer such as sodium dodecylbenzene sulfonate. Although the tape has excellent adhesive properties, it is removable from a variety of surfaces after one hour at 120°C and so is useful for purposes such as automotive masking tape.
Inventors
- 👤 Francis W. C/O Minnesota Mining And Brown
- 👤 Louis E. C/O Minnesota Mining And Winslow
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 20:14
CPC Classifications
C; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C09J133/08; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/385; C09J2301/00; C09J2301/30; C09J2301/302; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/2878; Y10T428/2887; Y10T428/2891
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
142 words
Pressure-sensitive adhesive comprising a copolymer of monomers comprising (a) from 95 to 99.8 parts by weight of at least one terminally unsaturated vinyl monomer, 60 to 100 weight percent of said monomer being selected from the class of nontertiary alkyl acrylates wherein each alkyl group has at least half of its carbon atoms in a single chain and the average length of the alkyl chain is at least 4 and not more than 12, and (b) from 0.2 to 5 parts by weight of at least one vinyl-unsaturated homopolymerizable emulsifier monomer which is a surfactant having both a hydrophobic and a hydrophilic moiety, contains at least 5 but not more than 40 carbon atoms, and is water-dispersible, the total parts by weight of (a) plus (b) being 100, characterized in that the emulsifier monomer is a monovalent salt of a styrene sulfonate.
Claim 2
Dependent Claim
142 words
Pressure-sensitive adhesive comprising a copolymer of monomers comprising (a) from 95 to 99.8 parts by weight of at least one terminally unsaturated vinyl monomer, 60 to 100 weight percent of said monomer being selected from the class of nontertiary alkyl acrylates wherein each alkyl group has at least half of its carbon atoms in a single chain and the average length of the alkyl chain is at least 4 and not more than 12, and (b) from 0.2 to 5 parts by weight of at least one vinyl-unsaturated homopolymerizable emulsifier monomer which is a surfactant having both a hydrophobic and a hydrophilic moiety, contains at least 5 but not more than 40 carbon atoms, and is water-dispersible, the total parts by weight of (a) plus (b) being 100, characterized in that the emulsifier monomer is a monovalent salt of a styrene sulfonate.
Claim 3
Dependent Claim
17 words
Pressure-sensitive adhesive tape comprising a self-sustaining backing sheet carrying a layer of pressure-sensitive adhesive of claim 1.
Claim 4
Dependent Claim
18 words
The pressure-sensitive adhesive tape of claim 2 further characterized in that said monomers are free from zwitterion monomer.
Claim 5
Dependent Claim
18 words
The pressure-sensitive adhesive tape of claim 2 further characterized in that the monovalent salt is sodium styrene sulfonate.
Claim 6
Dependent Claim
30 words
The pressure-sensitive tape of claim 4 further characterized in that the adhesive layer includes an external emulsifier in an amount comprising up to 1.5% by weight of the adhesive layer.
Claim 7
Dependent Claim
18 words
The pressure-sensitive adhesive tape of claim 2 further characterized in that said vinyl monomer includes an N-substituted acrylamide.
Claim 8
Dependent Claim
24 words
The pressure-sensitive adhesive tape of claim 2 further characterized in that the amount of the emulsifier monomer is from 0.5 to 2 weight percent.
Claim 9
Dependent Claim
123 words
Method of making the pressure-sensitive adhesive tape of claim 2 comprising the steps of (1) copolymerising the following monomers: (a) from 95 to 99.8 parts by weight of at least one terminally unsaturated vinyl monomer, 60 to 100 weight percent of said monomer being selected from the class of nontertiary alkyl acrylates wherein each alkyl group has at least half of its carbon atoms in a single chain and the average length of the alkyl chain is at least 4 and not more than 12, and (b) from 0.2 to 5 parts by weight of a monovalent salt of a styrene sulfonate, the total parts by weight of (a) plus (b) being 100, and (2) coating the resultant copolymer onto a backing sheet.
References Cited (Backward Citations)
No citation records indexed.
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