US5602221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sensitive adhesives with good low energy surface adhesion
Assignee: 3M Co
•
Filing: 1995-09-29
•
Granted: 1997-02-11
•
Expires: 2015-09-29
Abstract
Abstract A pressure sensitive adhesive that includes the polymerization product of: (a) 25-97 parts by weight of an acrylic acid ester of a monohydric alcohol whose homopolymer has a T g less than 0° C.; (b) 3-75 parts by weight of a non-polar ethylenically unsaturated monomer whose homopolymer has a solubility parameter of no greater than 10.50 and a T g greater than 15° C.; and (c) 0-5 parts by weight of a polar ethylenically unsaturated monomer whose homopolymer has a solubility parameter of greater than 10.50 and a T g greater than 15° C. The relative amounts of the acrylic acid ester, the non-polar ethylenically unsaturated monomer, and the polar ethylenically unsaturated monomer are chosen such that the 90° peel adhesion of the pressure sensitive adhesive to a polypropylene surface is at least 2 lbs/0.5 in. after a 72 hour dwell at room temperature as measured according to Test Procedure B.
Inventors
- 👤 Greggory S. Bennett
- 👤 Christopher A. Haak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:44
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/30; F16F9/306; C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1806; C08F220/1808; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/08; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C09J133/08; C09J4/00; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/385; C09J9/00; C09J9/02; C08L2666/00; C08L2666/02; C08L2666/54; C09J2301/00; C09J2301/30; C09J2301/302; C09J2301/40; C09J2301/416; H; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/321; H05K3/323
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
165 words
A composition consisting essentially of a pressure sensitive adhesive polymer consisting of the reaction product of: (a) 25-97 parts by weight of an acrylic acid ester of a monohydric alcohol whose homopolymer has a T g less than 0° C.; (b) 3-75 parts by Weight of a non-polar ethylenically unsaturated monomer whose homopolymer has a solubility parameter of no greater than 10.50 and a T g greater than 15° C.; and (c) 0-5 parts by weight of a polar ethylenically unsaturated monomer whose homopolymer has a solubility parameter greater than 10.50 and a T g greater than 15° C., the relative amounts of said acrylic acid ester, said non-polar ethylenically unsaturated monomer, and said polar ethylenically unsaturated monomer being chosen such that the 90° peel adhesion of said reaction product to a polypropylene surface is at least 2 lbs/0.5 in. after a 72 hour dwell at room temperature as measured according to Test Procedure B, with the proviso that the composition contains essentially no emulsifier.
Claim 2
Dependent Claim
165 words
A composition consisting essentially of a pressure sensitive adhesive polymer consisting of the reaction product of: (a) 25-97 parts by weight of an acrylic acid ester of a monohydric alcohol whose homopolymer has a T g less than 0° C.; (b) 3-75 parts by Weight of a non-polar ethylenically unsaturated monomer whose homopolymer has a solubility parameter of no greater than 10.50 and a T g greater than 15° C.; and (c) 0-5 parts by weight of a polar ethylenically unsaturated monomer whose homopolymer has a solubility parameter greater than 10.50 and a T g greater than 15° C., the relative amounts of said acrylic acid ester, said non-polar ethylenically unsaturated monomer, and said polar ethylenically unsaturated monomer being chosen such that the 90° peel adhesion of said reaction product to a polypropylene surface is at least 2 lbs/0.5 in. after a 72 hour dwell at room temperature as measured according to Test Procedure B, with the proviso that the composition contains essentially no emulsifier.
Claim 3
Dependent Claim
64 words
The pressure sensitive adhesive of claim 1, wherein the relative amounts of said acrylic acid ester, said non-polar ethylenically unsaturated monomer, and said polar ethylenically unsaturated monomer are chosen such that the 90° peel adhesion of said reaction product to a polypropylene surface is at least 2.5 lbs/0.5 in. after a 72 hour dwell at room temperature as measured according to Test Procedure B.
Claim 4
Dependent Claim
64 words
The pressure sensitive adhesive of claim 1, wherein the relative amounts of said acrylic acid ester, said non-polar ethylenically unsaturated monomer, and said polar ethylenically unsaturated monomer are chosen such that the 90° peel adhesion of said reaction product to a polypropylene surface is at least 3 lbs/0.5 in. after a 72 hour dwell at room temperature as measured according to Test Procedure B.
Claim 5
Dependent Claim
58 words
The pressure sensitive adhesive of claim 1, wherein the relative amounts of said acrylic acid ester, said non-polar ethylenically unsaturated monomer, and said polar ethylenically unsaturated monomer are chosen such that the shear strength of said reaction product at both room temperature and at 70° C. is greater than 50 minutes as measured according to Test Procedure C.
Claim 6
Dependent Claim
58 words
The pressure sensitive adhesive of claim 1, wherein the relative amounts of said acrylic acid ester, said non-polar ethylenically unsaturated monomer, and said polar ethylenically unsaturated monomer are chosen such that the shear strength of said reaction product at both room temperature and at 70° C. is greater than 1,000 minutes as measured according to Test Procedure C.
Claim 7
Dependent Claim
58 words
The pressure sensitive adhesive of claim 1, wherein the relative amounts of said acrylic acid ester, said non-polar ethylenically unsaturated monomer, and said polar ethylenically unsaturated monomer are chosen such that the shear strength of said reaction product at both room temperature and at 70° C. is greater than 10,000 minutes as measured according to Test Procedure C.
Claim 8
Dependent Claim
29 words
The pressure sensitive adhesive of claim 1, wherein the 1 radian/second tan delta maximum glass transition temperature of said reaction product is between -45° C. and 15° C., inclusive.
Claim 9
Dependent Claim
29 words
The pressure sensitive adhesive of claim 1, wherein the 1 radian/second tan delta maximum glass transition temperature of said reaction product is between -20° C. and -5° C., inclusive.
Claim 10
Dependent Claim
37 words
The composition of claim 1, wherein said pressure sensitive adhesive polymer consists of the reaction product of said acrylic acid ester, said non-polar ethylenically unsaturated monomer, and 0 parts by weight of said polar ethylenically unsaturated monomer.
Claim 11
Dependent Claim
21 words
The composition of claim 1, wherein the amount of said acrylic acid ester is between 40 and 85 parts by weight.
Claim 12
Dependent Claim
22 words
The composition of claim 1, wherein the amount of said non-polar ethylenically unsaturated monomer is between 15 and 60 parts by weight.
Claim 13
Dependent Claim
22 words
The composition of claim 1, wherein the amount of said polar ethylenically unsaturated monomer is between 0 and 3 parts by weight.
Claim 14
Dependent Claim
39 words
The composition of claim 1, wherein said acrylic acid ester is selected from the group consisting of isooctyl acrylate, 2-ethyl hexyl acrylate, isononyl acrylate, isodecyl acrylate, decyl acrylate, lauryl acrylate, hexyl acrylate, butyl acrylate, octadecyl acrylate, and combinations thereof.
Claim 15
Dependent Claim
19 words
The composition of claim 1, wherein said non-polar ethylenically unsaturated monomer is a monomer other than a methacrylate monomer.
Claim 16
Dependent Claim
32 words
The composition of claim 1, wherein said non-polar ethylenically unsaturated monomer is selected from the group consisting of 3,3,5 trimethylcyclohexyl acrylate, cyclohexyl acrylate, isobornyl acrylate, N-octyl acrylamide, t-butyl acrylate, and combinations thereof.
Claim 17
Dependent Claim
38 words
The composition of claim 1, wherein said polar ethylenically unsaturated monomer is selected from the group consisting of acrylic acid, itaconic acid, N,N dimethyl acrylamide, N-vinyl-2-pyrrolidone, N-vinyl caprolactam, acrylonitrile, tetrahydrofurfuryl acrylate, glycidyl acrylate, 2-phenoxyethylacrylate, benzylacrylate, and combinations thereof.
Claim 18
Dependent Claim
14 words
The composition of claim 1, wherein said non-polar ethylenically unsaturated monomer is isobornyl acrylate.
Claim 19
Dependent Claim
24 words
The composition of claim 1, wherein said pressure sensitive adhesive polymer consists of the reaction product of isooctyl acrylate, isobornyl acrylate, and acrylic acid.
Claim 20
Dependent Claim
22 words
The composition of claim 1, wherein said pressure sensitive adhesive polymer consists of the reaction product of isooctyl acrylate and isobornyl acrylate.
Claim 21
Dependent Claim
24 words
The composition of claim 1, wherein said pressure sensitive adhesive polymer consists of the reaction product of isooctyl acrylate, N-octyl acrylamide, and acrylic acid.
Claim 22
Dependent Claim
22 words
The composition of claim 1, wherein said pressure sensitive adhesive polymer consists of the reaction product of isooctyl acrylate and 3,3,5-trimethylcyclohexyl acrylate.
Claim 23
Dependent Claim
24 words
The composition of claim 1, wherein said pressure sensitive adhesive polymer consists of the reaction product of isooctyl acrylate, 3,3,5-trimethylcyclohexyl acrylate, and acrylic acid.
Claim 24
Dependent Claim
24 words
The composition of claim 1, wherein said pressure sensitive adhesive polymer consists of the reaction product of isooctyl acrylate, cyclohexyl acrylate, and acrylic acid.
Claim 25
Dependent Claim
195 words
A pressure sensitive adhesive consisting essentially of: (A) the reaction product of: (i) 25-97 parts by weight of an acrylic acid ester of a monohydric alcohol whose homopolymer has a T g less than 0° C.; (ii) 3-75 parts by weight of a non-polar ethylenically unsaturated monomer whose homopolymer has a solubility parameter of no greater than 10.50 and a T g greater than 15 ° C.; (iii) 0-5 parts by weight of a polar ethylenically unsaturated monomer whose homopolymer has a solubility parameter of greater than 10.50 and a T g greater than 15° C.; and, optionally, (iv) a crosslinking agent; and, optionally, (B) one or more additives selected from the group consisting essentially of microspheres, plasticizers, tackifiers, coloring agents, reinforcing agents, fire retardants, foaming agents, thermally conductive agents, electrically conductive agents, post-curing agents, accelerators, and combinations thereof, the relative amounts of said acrylic acid ester, said non-polar ethylenically unsaturated monomer, and said polar ethylenically unsaturated monomer being chosen such that the 90° peel adhesion of said reaction product to a polypropylene surface is at least 2 lbs/0.5 in. after a 72 hour dwell at room temperature as measured according to Test Procedure B.
Claim 26
Dependent Claim
195 words
A pressure sensitive adhesive consisting essentially of: (A) the reaction product of: (i) 25-97 parts by weight of an acrylic acid ester of a monohydric alcohol whose homopolymer has a T g less than 0° C.; (ii) 3-75 parts by weight of a non-polar ethylenically unsaturated monomer whose homopolymer has a solubility parameter of no greater than 10.50 and a T g greater than 15 ° C.; (iii) 0-5 parts by weight of a polar ethylenically unsaturated monomer whose homopolymer has a solubility parameter of greater than 10.50 and a T g greater than 15° C.; and, optionally, (iv) a crosslinking agent; and, optionally, (B) one or more additives selected from the group consisting essentially of microspheres, plasticizers, tackifiers, coloring agents, reinforcing agents, fire retardants, foaming agents, thermally conductive agents, electrically conductive agents, post-curing agents, accelerators, and combinations thereof, the relative amounts of said acrylic acid ester, said non-polar ethylenically unsaturated monomer, and said polar ethylenically unsaturated monomer being chosen such that the 90° peel adhesion of said reaction product to a polypropylene surface is at least 2 lbs/0.5 in. after a 72 hour dwell at room temperature as measured according to Test Procedure B.
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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) | 2000-02-11 | 2000-08-12 | 2001-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-02-11 | 2004-08-12 | 2005-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-02-11 | 2008-08-12 | 2009-02-11 | $7700.00 | Window Closed / Lapsed |