EP0250093A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Polysiloxane-grafted copolymer pressure sensitive adhesive composition and sheet materials coated therewith
Assignee: 3M Co
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Filing: 1987-05-18
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Granted: —
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Expires: 2007-05-18
Abstract
Abstract This invention provides pressure sensitive adhesive (PSA) compositions comprising a copolymer having a vinyl polymeric backbone having grafted thereto polysiloxane moieties. The compositions may contain other ingredients such as tackifier and/or plasticizer. An exposed surface of the PSA composition is initially positionable on a substrate to which it will be adhered but, once adhered, builds adhesion to form a strong bond. The PSA compositions may be used alone or in blends with unsiliconized PSA compositions. The invention also provides sheet materials coated with the PSA composition such as tape, labels, etc.
Inventors
- 👤 Mieczyslaw H. Minnesota Mining And Mazurek
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 09:26
CPC Classifications
C; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C09J133/08; C09J183/00; C09J183/10; C08; C08F; C08F290/00; C08F290/02; C08F290/06; C08F290/068; C09J133/062; C09J133/064; C09J151/00; C09J155/00; C09J155/005; C09J7/00; C09J7/20; C09J7/30; C09J7/38; C09J7/381; C09J7/385; Y; Y10; Y10S; Y10S428/00; Y10S428/906; Y10T; Y10T428/00; Y10T428/28; Y10T428/2839; Y10T428/2848
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
212 words
A pressure sensitive adhesive composition comprising: (a) a copolymer which comprises repeating A, C, and, optionally, B monomers wherein: A is at least one free radically polymerizable vinyl monomer; and B, when used, is at least one reinforcing monomer copolymerizable with A; characterized by C monomer having the general formula wherein: the amount and composition of C monomer in the copolymer is such as to provide said pressure sensitive adhesive composition with a decrease in initial peel adhesion value relative to that of an adhesive composition comprising a polymer of A and B, if used, without C and in the same relative amounts of A and B, if used, and of substantially the same molecular weight; X is a vinyl group copolymerizable with the A and B monomers; Y is a divalent linking group; R is hydrogen, lower alkyl, aryl, or alkoxy; Z is a monovalent siloxane polymeric moiety having a number average molecular weight of at least about 500 and is essentially unreactive under copolymerization conditions; n is zero or 1; m is an integer of from 1 to 3 (b) up to about 150 parts by weight compatible tackifying resin per 100 parts copolymer; and (c) up to about 50 parts by weight of compatible plasticizer per 100 parts copolymer.
Claim 2
Dependent Claim
212 words
A pressure sensitive adhesive composition comprising: (a) a copolymer which comprises repeating A, C, and, optionally, B monomers wherein: A is at least one free radically polymerizable vinyl monomer; and B, when used, is at least one reinforcing monomer copolymerizable with A; characterized by C monomer having the general formula wherein: the amount and composition of C monomer in the copolymer is such as to provide said pressure sensitive adhesive composition with a decrease in initial peel adhesion value relative to that of an adhesive composition comprising a polymer of A and B, if used, without C and in the same relative amounts of A and B, if used, and of substantially the same molecular weight; X is a vinyl group copolymerizable with the A and B monomers; Y is a divalent linking group; R is hydrogen, lower alkyl, aryl, or alkoxy; Z is a monovalent siloxane polymeric moiety having a number average molecular weight of at least about 500 and is essentially unreactive under copolymerization conditions; n is zero or 1; m is an integer of from 1 to 3 (b) up to about 150 parts by weight compatible tackifying resin per 100 parts copolymer; and (c) up to about 50 parts by weight of compatible plasticizer per 100 parts copolymer.
Claim 3
Dependent Claim
52 words
The pressure sensitive adhesive composition of claim 1 further characterized by at least one of said A monomers being selected from the group consisting of acrylic or methacrylic acid esters of non-tertiary alcohols having from 1 to 18 carbon atoms with the average number of carbon atoms being about 4 to 12.
Claim 4
Dependent Claim
22 words
The pressure sensitive adhesive composition of claim 2 further characterized by the average number of carbon atoms being about 6 to 10.
Claim 5
Dependent Claim
43 words
The pressure sensitive adhesive composition of claim 1 further characterized by said B being selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, acrylamide, methacrylamide, N,N-dimethylacrylamide, acrylonitrile, methacrylonitrile, N-vinyl pyrrolidone, and macromonomers having a T or Tm above about 20°C.
Claim 6
Dependent Claim
32 words
The pressure sensitive adhesive composition of claim 1 further characterized by said B monomer being selected from a group consisting of acrylic acid, acrylamide, methacrylic acid, N-vinyl pyrrolidone, acrylonitrile, and poly(styrene) macromonomer.
Claim 7
Dependent Claim
28 words
The pressure sensitive adhesive composition of claim 1 further characterized by said B monomer comprising about 2% to about 15% by weight of all monomers in said copolymer.
Claim 8
Dependent Claim
45 words
The pressure sensitive adhesive composition of claim 1 further characterized by said X group of said C monomer having the general formula wherein R 1 is hydrogen or a COOH group and R 2 is hydrogen, a methyl group, or a CH 2 COOH group.
Claim 9
Dependent Claim
56 words
The pressure sensitive adhesive composition of claim 1 further characterized by said Z group of said C monomer having the general formula wherein: R 3 and R 5 are independently lower alkyl, aryl, or fluoroalkyl; R 4 is alkyl, alkoxy, alkylamino, aryl, hydroxyl, or fluoroalkyl; and r is an integer from about 5 to about 700.
Claim 10
Dependent Claim
58 words
The pressure sensitive adhesive composition of claim 1 further characterized by said C monomer having a general formula selected from the group consisting of and wherein R" is alkyl or hydrogen; in is 1, 2 or 3; p is zero or 1; q is an integer from 2 to 6; s is an integer from 0 to 2.
Claim 11
Dependent Claim
28 words
The pressure sensitive adhesive composition of claim 1 further characterized by the molecular weight of said C monomer being in the range of about 500 to about 50,000.
Claim 12
Dependent Claim
28 words
The pressure sensitive adhesive composition of claim 1 further characterized by the molecular weight of said C monomer being in the range of about 5,000 to about 25,000.
Claim 13
Dependent Claim
37 words
The pressure sensitive adhesive composition of claim 1 further characterized by the amount by weight of said C monomer being within the range of about 0.01 to about 50% of the total monomer weight in said copolymer.
Claim 14
Dependent Claim
41 words
The pressure sensitive adhesive composition of claim 1 further characterized by the amount by weight of said B plus C monomers being within the range of about 0.01 to about 70% of the total weight of all monomers in said copolymer.
Claim 15
Dependent Claim
17 words
The pressure sensitive adhesive composition of claim 1 characterized by being in the form of a film.
Claim 16
Dependent Claim
33 words
A pressure sensitive adhesive coated sheet material comprising a backing sheet characterized by being at least partially coated on at least one major surface with the pressure sensitive adhesive composition of claim 1.
Claim 17
Dependent Claim
28 words
A pressure sensitive adhesive coated tape comprising an elongate backing characterized by being coated on at least one surface with the pressure sensitive adhesive composition of claim 1.
Claim 18
Dependent Claim
11 words
The pressure-sensitive adhesive of claim 1 further characterized by being crosslinked.
References Cited (Backward Citations)
No citation records indexed.
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