EP0303430A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Pressure-sensitive adhesive
Assignee: 3M Co
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Filing: 1988-08-08
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Granted: —
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Expires: 2008-08-08
Abstract
Abstract A pressure-sensitive adhesive is provided. The adhesive comprises (a) about 50 to 95 weight percent of an ultraviolet radiation polymerized polymer of (i) one or more monomers which are predominantly alkyl acrylate, the alkyl groups of which have an average of 4 to 12 carbon atoms and (ii) about 0 to 15 weight percent of one or more strongly polar copolymerizable monomers or about 0 to 30 weight percent of one or more moderately polar copolymerizable monomers; and (b) about 5 to 50 weight percent of one or more tackifying resins. The tackifying resins are aliphatic polymeric resins which have a number average molecular weight of about 300 to 2500, a polydispersity index of less than about 5, a glass transition temperature of about 40 to 120°C, and a solubility parameter of about 7 to 9.5 (cal/cc) -1/2 . The adhesive has a monomer conversion factor of at least 95%.
Inventors
- 👤 Michael K. Martin
- 👤 John D. Moon
- 👤 Francis M. Stark, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 05:10
CPC Classifications
C; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C09J133/08; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/385; C08; C08L; C08L2666/00; C08L2666/02; C09J2301/00; C09J2301/30; C09J2301/302
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
152 words
A pressure-sensitive adhesive comprising: (a) about 50 to 95 parts by weight of an ultraviolet radiation polymerized polymer of (i) one or more monomers which are predominantly alkyl acrylate, the alkyl groups of which have an average of 4 to 12 carbon atoms and (ii) about 0 to 15 parts by weight of one or more strongly polar copolymerizable monomers or about 0 to 30 parts by weight of one or more moderately polar copolymerizable monomers; and (b) about 5 to 50 parts by weight of one or more tackifying resins, said tackifying resins comprising aliphatic polymeric resins which have a number average molecular weight of about 300 to 2500, a polydispersity index of less than about 5, a glass transition temperature of about 40 to 120°C, and a solubility parameter of about 7 to 9.5 (cal/cc) -½ , and said adhesive having a monomer conversion factor of at least about 95%.
Claim 2
Dependent Claim
152 words
A pressure-sensitive adhesive comprising: (a) about 50 to 95 parts by weight of an ultraviolet radiation polymerized polymer of (i) one or more monomers which are predominantly alkyl acrylate, the alkyl groups of which have an average of 4 to 12 carbon atoms and (ii) about 0 to 15 parts by weight of one or more strongly polar copolymerizable monomers or about 0 to 30 parts by weight of one or more moderately polar copolymerizable monomers; and (b) about 5 to 50 parts by weight of one or more tackifying resins, said tackifying resins comprising aliphatic polymeric resins which have a number average molecular weight of about 300 to 2500, a polydispersity index of less than about 5, a glass transition temperature of about 40 to 120°C, and a solubility parameter of about 7 to 9.5 (cal/cc) -½ , and said adhesive having a monomer conversion factor of at least about 95%.
Claim 3
Dependent Claim
23 words
The pressure-sensitive adhesive of claim 1 wherein said aliphatic polymeric resin further contains from about 1 to about 80 weight percent aromatic components.
Claim 4
Dependent Claim
42 words
The pressure-sensitive adhesive of claim 1 or 2 wherein said aliphatic polymeric resin is derived from aliphatic C-5 or (C-5) 2 monomer fractions selected from the group consisting of cis-piperylene, trans-piperylene, isoprene, 2-methyl-2-butene, pentene, pentadienes, hexadienes, cyclopentadiene, dicyclopentadiene, α-pinene, β-pinene, or limonene.
Claim 5
Dependent Claim
63 words
The pressure-sensitive adhesive of claim 2 or 3 wherein said aromatic component comprises from about 40 to about 60 weight percent of said aliphatic polymeric resin, said aromatic components being derived from C-9 aromatic monomer hydrocarbon fractions selected from the group consisting of styrene, vinyl toluene, p-methy] styrene, p-methoxy styrene, a-methyl styrene, t-butyl styrene, butyl styrene, sec-butyl styrene, ethyl styrene, stilbene, and 1,1-diphenylethylene.
Claim 6
Dependent Claim
30 words
The pressure-sensitive adhesive of claim 1 further comprising from about 0.01 to about 1 weight percent of a photoinitiator based on the weight of the polymerizable monomers and tackifying agent.
Claim 7
Dependent Claim
31 words
The pressure-sensitive adhesive of claim 1 further comprising from about 0.01 to about 1 weight percent of a crosslinking agent based on the weight of the polymerizable monomers and tackifying agent.
Claim 8
Dependent Claim
30 words
The pressure-sensitive adhesive of claim 1 further comprising from about 5 to 65 volume percent microbubbles, said microbubbles having an average diameter of from about 10 to about 200 microns.
Claim 9
Dependent Claim
25 words
A pressure-sensitive adhesive tape comprising a flexible carrier web having the pressure-sensitive adhesive of claim 1 adhered to at least one surface of said web.
Claim 10
Dependent Claim
24 words
A pressure-sensitive transfer tape comprising a flexible carrier web having the pressure-sensitive adhesive of claim 1 releasably adhered to one surface of said web.
References Cited (Backward Citations)
FR2284658A1
Cited
US4599265A
Cited
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