Patent EP0104046A2 successfully refreshed from Google Patents.
EP0104046A2
Expired / Lapsed
EP
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Acrylate copolymer pressure-sensitive adhesive composition and sheet materials coated therewith
Assignee: 3M Co
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Filing: 1983-09-14
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Granted: —
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Expires: 2003-09-14
Abstract
Abstract The invention provides normally tacky and pressure-sensitive adhesive compositions comprising a polymer having an inherent viscosity greater than 0.2 and having in its backbone at least a major portion by weight of polymerized monomeric acrylic or methacrylic acid ester of a non-tertiary alcohol and, having attached to the backbone, polymeric moieties having a weight average molecular weight of above about 2,000 and a T g of above about 20°C. The number and composition of the attached moieties in the polymer is such as to provide the adhesive composition with a shear holding value of at least 50 minutes. Sheet materials coated with the adhesive composition are also provided. Preferred adhesive composition comprises a copolymer monomeric acrylic or methacrylic acid ester of non-tertiary alcohol and macromolecular monomer. The copolymer may also include up to 12% by weight of a copolymerizable polar monomer such as acrylic acid.
Inventors
- 👤 James R. C/O Minnesota Mining And Husman
- 👤 James N. C/O Minnesota Mining And Kellen
- 👤 Rebecca E. C/O Minnesota Mining And Mccluney
- 👤 Michael L. C/O Minnesota Mining And Tumey
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 15:31
CPC Classifications
C; C09; C09J; C09J155/00; C09J155/005; C08; C08F; C08F290/00; C08F290/02; C08F290/04; C08F291/00; C08F8/00; 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; Y10S; Y10S526/00; Y10S526/931; Y10T; Y10T428/00; Y10T428/28; Y10T428/2804; Y10T428/2852; Y10T428/2878; Y10T428/2887; Y10T428/2891; Y10T428/31504; Y10T428/31551; Y10T428/31645; Y10T428/31649; Y10T428/31678; Y10T428/31692; Y10T428/31699; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31891; Y10T428/31895; Y10T428/31906; Y10T428/31909; Y10T428/31928; Y10T428/31935; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
117 words
A normally tacky and pressure-sensitive adhesive composition characterized by being a polymer having an inherent viscosity greater than 0.2 and having in its backbone at least a major portion by weight of polymerized monomeric acrylic or methacrylic acid ester of a non-tertiary alcohol, said alcohol having from 1 to 14 carbon atoms with the average number of carbon atoms being about 4-12, and, having attached to said backbone, polymeric moieties having a weight average molecular weight above about 2000 and a T g of above about 20°C, the number of aid composition of said attached moieties in said polymer being such as to provide said adhesive composition with the shear holding value of at least 50 minutes.
Claim 2
Dependent Claim
117 words
A normally tacky and pressure-sensitive adhesive composition characterized by being a polymer having an inherent viscosity greater than 0.2 and having in its backbone at least a major portion by weight of polymerized monomeric acrylic or methacrylic acid ester of a non-tertiary alcohol, said alcohol having from 1 to 14 carbon atoms with the average number of carbon atoms being about 4-12, and, having attached to said backbone, polymeric moieties having a weight average molecular weight above about 2000 and a T g of above about 20°C, the number of aid composition of said attached moieties in said polymer being such as to provide said adhesive composition with the shear holding value of at least 50 minutes.
Claim 3
Dependent Claim
252 words
An adhesive composition according to claim 1 characterized in that it consists essentially of copolymerized repeating A and C monomers and optionally B monomers, wherein A is the monomeric acrylic or methacrylic acid ester of a non-tertiary alcohol; when used, B is at least one polar monomer copolymerizable with said monomeric acrylic acid ester, the amount by weight of B monomer being up to 121 of the total weight of all monomers; and C is a monomer having the general formula X-(Y) n -Z wherein X is a vinyl group copolymerizable with said A and B monomers; Y is a divalent linking group; where n can be zero or 1; Z is a monovalent polymeric moiety having a T 9 greater than 20°C and a molecular weight in the range of about 2,000 to 30,000 and being essentially unreactive under copolymerization conditions; wherein said vinyl group and said A and B monomers are copolymerized to form a soft polymeric backbone having pendant therefrom said polymeric moieties and wherein the weight of said C monomer is within the range of about 1 to 30% of the total weight of all monomers in said copolymer and the total weight of said B and C monomers in said copolymer is within the range of about 4 to 30% of the total weight of all monomers in said copolymer, the amount of said C monomer in said polymer is such as to provide said adhesive composition with a shear holding value of at least 50 minutes.
Claim 4
Dependent Claim
27 words
An adhesive composition according to claim 2 characterized in that the polar monomer is selected from acrylic acid, methacrylic acid, itaconic acid, acrylamide, methacrylamide, acrylonitrile and methacrylonitrile.
Claim 5
Dependent Claim
35 words
An adhesive composition according to either of claims 2 and 3 further characterized by the X group of said C monomer having the general formula wherein R' is a hydrogen atom or a methyl group.
Claim 6
Dependent Claim
85 words
An adhesive composition according to any one of claims 2 to 4 characterized in that the Z group of the said C monomer has the general formula wherein R 2 is a hydrogen atom or a lower alkyl group, R 3 is a lower alkyl group, n is an integer from 20 to 500 and is a monovalent radical selected from or -CO 2 R 6 wherein R 5 is a hydrogen atom or a lower alkyl group and R6 is a lower alkyl group.
Claim 7
Dependent Claim
40 words
An adhesive composition according to any one of claims 2 to 5 further characterized by said C monomer having a general formula selected from the group consisting of wherein R 7 is a hydrogen atom or a lower alkyl group.
Claim 8
Dependent Claim
36 words
The pressure-sensitive adhesive composition according to any one of claims 2 to 6 further characterized by said A monomer being isooctyl acrylate, said B monomer being acrylic acid and said C monomer being methacrylate-terminated polystyrene. ,
Claim 9
Dependent Claim
33 words
. An adhesive composition according to any one of claims 2 to 7 wherein said copolymer contains from 2 to 8% by weight of B monomer of the total weight of all monomers.
Claim 10
Dependent Claim
50 words
A normally tacky and pressure-sensitive adhesive coated sheet material comprising a backing member and a coating covering at least one portion of one major surface thereof of a pressure-sensitive adhesive composition characterized in that said 05 composition is an adhesive composition according to any one of claims 1 to 8.
References Cited (Backward Citations)
No citation records indexed.
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