US5202361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive adhesive
Assignee: 3M Co
•
Filing: 1991-12-23
•
Granted: 1993-04-13
•
Expires: 2011-12-23
Abstract
Abstract Radiation-curable, tackifier-free compositions are provided which contain: (i) a blend of certain acrylate esters and monoethylenically-unsaturated copolymerizable monomers; (ii) certain α-olefin polymers; and (iii) a photoinitiator and optionally, a crosslinker. Pressure-sensitive adhesives having good adhesion to both low and high energy surfaces as well as possessing excellent low and high temperature performance properties are prepared by exposing the radiation-curable compositions to light having a wavelength in the range of from about 280 to 400 nm.
Inventors
- 👤 Patrick G. Zimmerman
- 👤 Gaddam N. Babu
- 👤 Lang N. Nguyen
- 👤 Ingrid E. Blair
- 👤 George F. Vesley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:04
CPC Classifications
C; C09; C09J; C09J4/00; C09J4/06; C09J123/00; C09J123/02; C09J123/18; C09J133/00; C09J133/04; C09J133/06; C09J133/08; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/385; C08; C08L; C08L23/00; C08L23/02; C08L2666/00; C08L2666/02; C08L2666/04; C09J2301/00; C09J2301/30; C09J2301/302; Y; Y10; Y10S; Y10S526/00; Y10S526/931; Y10T; Y10T428/00; Y10T428/28; Y10T428/2809; Y10T428/2852; Y10T428/2878; Y10T428/2891
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
139 words
A radiation-curable tackifier-free composition comprising: a) 100 parts by weight (pbw) of a blend of: i) 60 to 100 pbw acrylic acid esters of monohydric alcohols having an average of 4 to 12 carbon atoms; and ii) 0 to about 40 pbw monoethylenically-unsaturated copolymerizable monomer whose homopolymer has a T g greater than about 50° C.; b) 10 to 100 pbw of polymer of alpha-olefins having a T g in the range of about -70° C. to -10° C. and having a weight average molecular weight of about 25,000 to about 5,000,000 wherein at least 60 mole percent of the alpha-olefins have 6 to 18 carbon atoms; and c) photochemically effective amount of a material selected from the group consisting of: (i) photoinitiator, (ii) photoinitiator and a polyfunctional acrylate crosslinker; and (iii) a photoinitiator that is also a photocrosslinker.
Claim 2
Dependent Claim
139 words
A radiation-curable tackifier-free composition comprising: a) 100 parts by weight (pbw) of a blend of: i) 60 to 100 pbw acrylic acid esters of monohydric alcohols having an average of 4 to 12 carbon atoms; and ii) 0 to about 40 pbw monoethylenically-unsaturated copolymerizable monomer whose homopolymer has a T g greater than about 50° C.; b) 10 to 100 pbw of polymer of alpha-olefins having a T g in the range of about -70° C. to -10° C. and having a weight average molecular weight of about 25,000 to about 5,000,000 wherein at least 60 mole percent of the alpha-olefins have 6 to 18 carbon atoms; and c) photochemically effective amount of a material selected from the group consisting of: (i) photoinitiator, (ii) photoinitiator and a polyfunctional acrylate crosslinker; and (iii) a photoinitiator that is also a photocrosslinker.
Claim 3
Dependent Claim
17 words
The radiation-curable, tackifier-free composition according to claim 1 comprising about 70-95 pbw of said acrylic acid ester.
Claim 4
Dependent Claim
17 words
The radiation-curable, tackifier-free composition according to claim 1 comprising about 5-30 pbw of said monoethylenically-unsaturated copolymerizable monomer.
Claim 5
Dependent Claim
18 words
The radiation-curable, tackifier-free composition according to claim 1 wherein said monoethylenically-unsaturated copolymerizable monomer is a strongly polar monomer.
Claim 6
Dependent Claim
18 words
The radiation-curable, tackifier-free composition according to claim 1 wherein said monoethylenically-unsaturated copolymerizable monomer is a moderately polar monomer.
Claim 7
Dependent Claim
17 words
The radiation-curable, tackifier-free composition according to claim 1 comprising 30 to 70 pbw of said alpha-olefin polymer.
Claim 8
Dependent Claim
26 words
The radiation-curable, tackifier-free composition according to claim 1 wherein said alpha-olefin polymer has a T g in the range of about -60° C. to -25° C.
Claim 9
Dependent Claim
24 words
The radiation-curable, tackifier-free composition according to claim 1 wherein said alpha-olefin polymer has a weight average molecular weight of about 50,000 to about 3,500,000.
Claim 10
Dependent Claim
24 words
The radiation-curable, tackifier-free composition according to claim 1 wherein said alpha-olefin polymer has a weight average molecular weight of about 50,000 to about 250,000.
Claim 11
Dependent Claim
27 words
The radiation-curable, tackifier-free composition according to claim 1 wherein at least 80 mole percent of said alpha-olefins of said alpha-olefin polymer have 6 to 12 carbon atoms.
Claim 12
Dependent Claim
31 words
A radiation-curable, tackifier-free composition according to claim 1 wherein said photoinitiator is one selected from the group consisting of: benzoin ethers; substituted acetophenones; substituted alpha-ketols; aromatic sulfonyl chlorides; and photoactive oximes.
Claim 13
Dependent Claim
17 words
A radiation-curable, tackifier-free composition according to claim 1 wherein said photoinitiator and said photocrosslinker is a trihalomethyl-s-triazine.
Claim 14
Dependent Claim
13 words
The radiation-curable, tackifier-free composition according to claim 1 further comprising hollow polymeric microspheres.
Claim 15
Dependent Claim
12 words
The radiation-curable, tackifier-free composition according to claim 1 further comprising glass microspheres.
Claim 16
Dependent Claim
12 words
The radiation-curable, tackifier-free composition according to claim 1 further comprising hydrophobic silica.
Claim 17
Dependent Claim
30 words
A pressure-sensitive adhesive prepared by the process of exposing the radiation-curable composition of claim 1 to radiation having a wavelength in the range of from about 280 to 400 nm.
Claim 18
Dependent Claim
19 words
The pressure-sensitive adhesive of claim 16 wherein the total dose of radiation is between about 400-600 milliJoule/cm 2 .
Claim 19
Dependent Claim
30 words
A pressure-sensitive adhesive prepared by the process of exposing the radiation-curable composition of claim 6 to radiation having a wavelength in the range of from about 280 to 400 nm.
Claim 20
Dependent Claim
30 words
A pressure-sensitive adhesive prepared by the process of exposing the radiation-curable composition of claim 7 to radiation having a wavelength in the range of from about 280 to 400 nm.
Claim 21
Dependent Claim
30 words
A pressure-sensitive adhesive prepared by the process of exposing the radiation-curable composition of claim 8 to radiation having a wavelength in the range of from about 280 to 400 nm.
Claim 22
Dependent Claim
30 words
A pressure-sensitive adhesive prepared by the process of exposing the radiation-curable composition of claim 9 to radiation having a wavelength in the range of from about 280 to 400 nm.
Claim 23
Dependent Claim
30 words
A pressure-sensitive adhesive prepared by the process of exposing the radiation-curable composition of claim 11 to radiation having a wavelength in the range of from about 280 to 400 nm.
Claim 24
Dependent Claim
30 words
A pressure-sensitive adhesive prepared by the process of exposing the radiation-curable composition of claim 12 to radiation having a wavelength in the range of from about 280 to 400 nm.
Claim 25
Dependent Claim
30 words
A pressure-sensitive adhesive prepared by the process of exposing the radiation-curable composition of claim 13 to radiation having a wavelength in the range of from about 280 to 400 nm.
Claim 26
Dependent Claim
30 words
A pressure-sensitive adhesive prepared by the process of exposing the radiation-curable composition of claim 15 to radiation having a wavelength in the range of from about 280 to 400 nm.
Claim 27
Dependent Claim
16 words
A pressure-sensitive adhesive tape comprising the pressure-sensitive adhesive of claim 16 coated on a suitable substrate.
Claim 28
Dependent Claim
15 words
The pressure-sensitive adhesive tape of claim 26 wherein said suitable substrate is siliconized poly(ethylene terephthalate).
Claim 29
Dependent Claim
15 words
The pressure-sensitive adhesive tape of claim 26 wherein the pressure-sensitive adhesive has a cellular structure.
Claim 30
Dependent Claim
19 words
The pressure-sensitive adhesive tape of claim 28 wherein the pressure-sensitive adhesive is in the form of a cellular membrane.
References Cited (Backward Citations)
US3635755A
Cited
US4181752A
Cited
US3954697A
Cited
US4178272A
Cited
US4243500A
Cited
US4288358A
Cited
US4364972A
Cited
US4414275A
Cited
US5079047A
Cited
EP0416921A1
Cited
US5112882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-12 | 1996-10-12 | 1997-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-12 | 2000-10-12 | 2001-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-12 | 2004-10-12 | 2005-04-13 | $7700.00 | Window Closed / Lapsed |