US5049608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylic pressure sensitive adhesive compositions having improved low temperature adhesion
Assignee: Air Products and Chemicals Inc
•
Filing: 1989-05-03
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Granted: 1991-09-17
•
Expires: 2009-05-03
Abstract
Abstract A pressure sensitive adhesive composition having good low temperature and room temperature performance comprising (a) a 2-ethylhexyl acrylate/polar monomer copolymer emulsion, the copolymer having a Tg from -70° to -40° C. and (b) 3 to 9 wt %, based on copolymer, nonionic poly(ethyleneoxy) ethanol having at least 70 ethyleneoxy units.
Inventors
- 👤 Steven W. Medina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:34
CPC Classifications
C; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C09J133/062; C09J133/064; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/14; C08L71/00; C08L71/02; C09J2301/00; C09J2301/30; C09J2301/302
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
75 words
In a low temperature pressure sensitive adhesive composition comprising an aqueous emulsion of a pressure sensitive adhesive copolymer and a post-added nonionic poly(ethyleneoxy) surfactant, the improvement which comprises a 2-ethylhexyl acrylate/polar monomer copolymer containing 40 to 97 wt % 2-ethylhexyl acrylate and having a Tg of -70° to -40° C. as the pressure sensitive adhesive copolymer, and 3-9 wt %, based on emulsion solids, nonionic poly(ethyleneoxy) ethanol surfactant containing at least 70 ethylene oxide units.
Claim 2
Dependent Claim
75 words
In a low temperature pressure sensitive adhesive composition comprising an aqueous emulsion of a pressure sensitive adhesive copolymer and a post-added nonionic poly(ethyleneoxy) surfactant, the improvement which comprises a 2-ethylhexyl acrylate/polar monomer copolymer containing 40 to 97 wt % 2-ethylhexyl acrylate and having a Tg of -70° to -40° C. as the pressure sensitive adhesive copolymer, and 3-9 wt %, based on emulsion solids, nonionic poly(ethyleneoxy) ethanol surfactant containing at least 70 ethylene oxide units.
Claim 3
Dependent Claim
22 words
The pressure sensitive adhesive composition of claim 1 in which the nonionic surfactant is a C 7 -C 18 alkylphenoxy poly(ethyleneoxy) ethanol.
Claim 4
Dependent Claim
17 words
The pressure sensitive adhesive composition of claim 2 in which the alkyl group is octyl or nonyl.
Claim 5
Dependent Claim
20 words
The pressure sensitive adhesive composition of claim 1 in which the nonionic surfactant contains 70 to 150 ethylene oxide units.
Claim 6
Dependent Claim
19 words
The pressure sensitive adhesive composition of claim 1 in which the nonionic surfactant contains about 100 ethylene oxide units.
Claim 7
Dependent Claim
21 words
The pressure sensitive adhesive composition of claim 1 in which the copolymer has a Tg ranging from -60° to -45° C.
Claim 8
Dependent Claim
20 words
The pressure sensitive adhesive composition of claim 1 in which the copolymer contains 5 to 20 wt % polar comonomer.
Claim 9
Dependent Claim
81 words
In a low temperature pressure sensitive adhesive composition comprising an aqueous emulsion of a pressure sensitive adhesive copolymer and a post-added nonionic poly(ethyleneoxy) surfactant, the improvement which comprises a 2-ethylhexyl acrylate/polar monomer copolymer containing 40 to 97 wt % 2-ethylhexyl acrylate and having a Tg of -70° to -40° C. as the pressure sensitive adhesive copolymer and 3 to 9 wt %, based on emulsion solids, C 8 -C 9 alkylphenoxy poly(ethyleneoxy) ethanol containing about 70 to 150 ethylene oxide units.
Claim 10
Dependent Claim
81 words
In a low temperature pressure sensitive adhesive composition comprising an aqueous emulsion of a pressure sensitive adhesive copolymer and a post-added nonionic poly(ethyleneoxy) surfactant, the improvement which comprises a 2-ethylhexyl acrylate/polar monomer copolymer containing 40 to 97 wt % 2-ethylhexyl acrylate and having a Tg of -70° to -40° C. as the pressure sensitive adhesive copolymer and 3 to 9 wt %, based on emulsion solids, C 8 -C 9 alkylphenoxy poly(ethyleneoxy) ethanol containing about 70 to 150 ethylene oxide units.
Claim 11
Dependent Claim
15 words
The pressure sensitive adhesive composition of claim 8 in which the alkyl group is nonyl.
Claim 12
Dependent Claim
20 words
The pressure sensitive adhesive composition of claim 8 in which the alkylphenoxy poly(ethyleneoxy) ethanol contains about 100 ethylene oxide units.
Claim 13
Dependent Claim
20 words
The pressure sensitive adhesive composition of claim 9 in which the alkylphenoxy poly(ethyleneoxy) ethanol contains about 100 ethylene oxide units.
Claim 14
Dependent Claim
21 words
The pressure sensitive adhesive composition of claim 9 in which the copolymer has a Tg ranging from -60° to -45° C.
Claim 15
Dependent Claim
36 words
The pressure sensitive adhesive composition of claim 8 in which the copolymer consists essentially of 50 to 97 wt % 2-ethylhexyl acrylate and 5 to 20 wt % of a polar monomer which is vinyl acetate.
Claim 16
Dependent Claim
70 words
In a low temperature pressure sensitive adhesive composition comprising an aqueous emulsion of a pressure sensitive adhesive copolymer and a post-added nonionic poly(ethyleneoxy) surfactant, the improvement which comprises a 2-ethylhexyl acrylate/vinyl acetate/methyl methacrylate/acrylic acid copolymer having a Tg ranging from -60° to -45° C. as the pressure sensitive adhesive copolymer and 4-6 wt %, based on emulsion solids, nonyl phenoxy poly(ethyleneoxy) ethanol containing about 70 to 150 ethylene oxide units.
Claim 17
Dependent Claim
70 words
In a low temperature pressure sensitive adhesive composition comprising an aqueous emulsion of a pressure sensitive adhesive copolymer and a post-added nonionic poly(ethyleneoxy) surfactant, the improvement which comprises a 2-ethylhexyl acrylate/vinyl acetate/methyl methacrylate/acrylic acid copolymer having a Tg ranging from -60° to -45° C. as the pressure sensitive adhesive copolymer and 4-6 wt %, based on emulsion solids, nonyl phenoxy poly(ethyleneoxy) ethanol containing about 70 to 150 ethylene oxide units.
Claim 18
Dependent Claim
19 words
The pressure sensitive adhesive composition of claim 14 in which the nonionic surfactant contains about 100 ethylene oxide units.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-16 | 1995-03-18 | 1995-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-16 | 1999-03-18 | 1999-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-16 | 2003-03-18 | 2003-09-17 | $7700.00 | Window Closed / Lapsed |