EP0357229B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Acrylic hot melt pressure sensitive adhesive compositions
Assignee: Cessione ici Acrylics Inc
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Filing: 1989-07-31
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Granted: 1994-01-05
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Expires: 2009-07-31
Abstract
No abstract record available.
Inventors
- 👤 Paul Andrew Mancinelli
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 22:51
CPC Classifications
C; C08; C08F; C08F290/00; C08F290/02; C08F290/04; C08F290/046; C09; C09J; C09J155/00; C09J155/005; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/385
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
199 words
An acrylic hot melt pressure sensitive adhesive composition comprising (a) 30 to 90% by weight of a thermoplastic comb copolymer of (i) 2-35% by weight, based on the thermoplastic copolymer, of a macromonomer of the general formula X-(Y) n -Z wherein X is a reactive end group capable of copolymerization under free radical conditions with acrylic comonomers to afford the comb copolymer having pendant macromonomer side chains along an acrylic backbone; Y is a linking group in which n is zero or one; and Z is a poly(methacrylate) based a polymeric moiety having a T g greater than 20°C and a weight average molecular weight of from 2,000 to 35,000 and being substantially unreactive under copolymerization conditions; and (ii) 65 to 98% by weight, based on the thermoplastic copolymer, of an acrylic backbone having a T g in the range of from 0 to -80°C of one or more monomers selected from monomeric acrylic or methacrylic acid ester of a non-tertiary alcohol, the alcohol having from 1 to 18 carbon atoms; (b) from 10 to 70% by weight of tackifier selected from hydrogenated resin esters and hydrogenated poly-(aromatic) copolymers; and (c) from 0 to 20% by weight of plasticizer.
Claim 2
Dependent Claim
39 words
An acrylic hot melt pressure sensitive adhesive composition of Claim 1 wherein component (a) (ii) further comprises up to about 10% of at least one monomer selected from methacrylic acid, acrylic acid, acrylamide, methacrylamide, glycidyl methacrylate and hydroxyethyl acrylate.
Claim 3
Dependent Claim
27 words
An acrylic hot melt pressure sensitive adhesive composition of Claim 1 or 2 wherein the molecular weight of the macromonomer (a) (i) is from 4,000 to 20,000.
Claim 4
Dependent Claim
23 words
An acrylic hot melt pressure sensitive adhesive composition of Claim 1, 2 or 3 wherein the macromonomer consists essentially of poly methyl methacrylate.
Claim 5
Dependent Claim
39 words
An acrylic hot melt pressure sensitive adhesive composition of any one of Claims 1 to 4 wherein the comb copolymer comprises from 5 to 25 % macromonomer and from 95 to 75 % acrylic or methacrylic acid ester comonomer.
Claim 6
Dependent Claim
30 words
An acrylic hot melt pressure sensitive adhesive composition of any one of Claims 1 to 5 wherein component (a) (ii) comprises at least one of 2-ethylhexyl acrylate and isooctyl acrylate.
Claim 7
Dependent Claim
36 words
An acrylic hot melt pressure sensitive adhesive composition of Claim 6 wherein component (a) (ii) further comprises from 1 to 40 % of at least one monomer selected from lauryl methacrylate, stearyl methacrylate, and isodecyl acrylate.
Claim 8
Dependent Claim
31 words
An acrylic hot melt pressure sensitive adhesive composition of any one of Claims 1 to 7 wherein the comb polymer has an apparent peak molecular weight of from 70,000 to 600,000.
Claim 9
Dependent Claim
26 words
An acrylic hot melt pressure sensitive adhesive composition of Claim 8 wherein the comb polymer has an apparent peak molecular weight of from 100,000 to 300,000.
Claim 10
Dependent Claim
34 words
An acrylic hot melt pressure sensitive adhesive composition of any one of Claims 1 to 9 wherein the concentration of tackifier is from 30 to 50% by weight, based on the total adhesive composition.
Claim 11
Dependent Claim
63 words
An acrylic hot melt pressure sensitive adhesive composition of any one of Claims 1 to 10 wherein the tackifier comprises a blend of from 95 to 80%, by weight of the tackifier, of at least one hydrogenated poly(aromatic) copolymer and complementally from 5 to 15%, by weight of the tackifier, of a second tackifier compatible with the acrylic backbone of the comb polymer.
Claim 12
Dependent Claim
25 words
An acrylic hot melt pressure sensitive adhesive composition of Claim 11 wherein the second tackifier consists essentially of at least one hydrogenated rosin ester compound.
Claim 13
Dependent Claim
28 words
An acrylic hot melt pressure sensitive adhesive composition of any one of Claims 1 to 10 wherein the tackifier consists essentially of hydrogenated rosin ester formed with pentaerythritol.
Claim 14
Dependent Claim
28 words
An acrylic hot melt pressure sensitive adhesive composition of any one of Claims 1 to 10 wherein the tackifier consists essentially of hydrogenated rosin ester formed with glycerine.
Claim 15
Dependent Claim
31 words
An acrylic hot melt pressure sensitive adhesive composition of any one of Claims 1 to 14 wherein the tackifier has a ring and ball softening point of from 75 to 125°C.
Claim 16
Dependent Claim
41 words
An acrylic hot melt pressure sensitive adhesive composition of any one of Claims 1 to 15 wherein the plasticizer is selected from adipate and glutarate esters, hydrogenated rosin esters, reduced alcohol derivatives, hydrogenated poly (aromatic) copolymers, mineral oils and paraffin oils.
Claim 17
Dependent Claim
30 words
Pressure sensitive adhesive coated sheet material comprising a flexible backing having a coating of an acrylic hot melt pressure sensitive adhesive composition of any one of Claims 1 to 16.
References Cited (Backward Citations)
No citation records indexed.
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