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US4379201A
Expired / Lapsed
US
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Multiacrylate cross-linking agents in pressure-sensitive photoadhesives
Assignee: 3M Co
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Filing: 1981-03-30
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Granted: 1983-04-05
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Expires: 2001-03-30
Abstract
Abstract Pressure-sensitive adhesive tape having a photopolymerized acrylate polymer adhesive which has been crosslinked by a polyacrylic-functional crosslinking monomer such as trimethyol-propane triacrylate.
Inventors
- 👤 Steven M. Heilmann
- 👤 John D. Moon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:45
CPC Classifications
C; C09; C09J; C09J4/00; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/385; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2809; Y10T428/2852; Y10T428/2878; Y10T428/2887; Y10T428/2891
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
159 words
Method of making pressure-sensitive adhesive tape using a coatable mixture which is polymerizable by ultraviolet radiation to a pressure-sensitive adhesive state, which mixture comprises (a) partially polymerized acrylic acid ester of non-tertiary alcohol, the alkyl groups of which have an average of about 4 to 14 carbon atoms, said acrylic acid ester being per se polymerizable to a sticky, stretchable, elastic adhesive mass and (b) a photoinitiator, which coatable mixture is (1) coated onto a backing member and (2) exposed to ultraviolet radiation to polymerize the mixture to a pressure-sensitive adhesive state, wherein the improvement comprises: dissolved in the mixture is polyacrylic-functional crosslinking monomer having less than 10 atoms in the chain between polymerizable vinyl groups and being present in an amount providing about 0.5 to 5×10 -5 diacrylate equivalent per gram of component (a), thus providing a crosslinked adhesive coating affording an Adhesion Value of at least 83 N/dm and a Shear Value of at least 1250 minutes.
Claim 2
Dependent Claim
159 words
Method of making pressure-sensitive adhesive tape using a coatable mixture which is polymerizable by ultraviolet radiation to a pressure-sensitive adhesive state, which mixture comprises (a) partially polymerized acrylic acid ester of non-tertiary alcohol, the alkyl groups of which have an average of about 4 to 14 carbon atoms, said acrylic acid ester being per se polymerizable to a sticky, stretchable, elastic adhesive mass and (b) a photoinitiator, which coatable mixture is (1) coated onto a backing member and (2) exposed to ultraviolet radiation to polymerize the mixture to a pressure-sensitive adhesive state, wherein the improvement comprises: dissolved in the mixture is polyacrylic-functional crosslinking monomer having less than 10 atoms in the chain between polymerizable vinyl groups and being present in an amount providing about 0.5 to 5×10 -5 diacrylate equivalent per gram of component (a), thus providing a crosslinked adhesive coating affording an Adhesion Value of at least 83 N/dm and a Shear Value of at least 1250 minutes.
Claim 3
Dependent Claim
43 words
Method as defined in claim 1 wherein component (a) includes at least one copolymerizable monomer selected from acrylic acid, methacrylic acid, itaconic acid, acrylamide, methacrylamide, an N-acryloylamino acid, and N-vinyl-2-pyrrolidone in an amount providing up to about 12% by weight of component (a).
Claim 4
Dependent Claim
36 words
Method as defined in claims 1 or 2, wherein component (a) is partially polymerized by virtue of a portion of the acrylic acid ester being fully polymerized and dissolved in an unpolymerized or incompletely polymerized portion.
Claim 5
Dependent Claim
15 words
Method as defined in claim 1 wherein the polyacrylic-functional crosslinking monomer is ethylene glycol diacrylate.
Claim 6
Dependent Claim
14 words
Method as defined in claim 1 wherein the polyacrylic-functional crosslinking monomer is trimethyolpropane diacrylate.
Claim 7
Dependent Claim
14 words
Method as defined in claim 1 wherein the polyacrylic-functional crosslinking monomer is pentaerythritol triacrylate.
Claim 8
Dependent Claim
14 words
Method as defined in claim 1 wherein the polyacrylic-functional crosslinking monomer is pentaerythritol tetracrylate.
Claim 9
Dependent Claim
105 words
A photoactive mixture having a coatable viscosity of 300 to 20,000 centipoises at ordinary room temperature and comprising (a) a partially polymerized acrylic acid ester of non-tertiary alcohol, the alkyl groups of which have an average of about 4 to 14 carbon atoms, said acrylic acid ester being per se polymerizable to a sticky, stretchable, elastic adhesive mass, and (b) a photoinitiator wherein the improvement comprises dissolved in the mixture is polyacrylic-functional crosslinking monomer having less than 10 atoms in the chain between polymerizable vinyl groups and being present in an amount providing about 0.5 to 5×10 -5 diacrylate equivalent per gram of component (a).
Claim 10
Dependent Claim
105 words
A photoactive mixture having a coatable viscosity of 300 to 20,000 centipoises at ordinary room temperature and comprising (a) a partially polymerized acrylic acid ester of non-tertiary alcohol, the alkyl groups of which have an average of about 4 to 14 carbon atoms, said acrylic acid ester being per se polymerizable to a sticky, stretchable, elastic adhesive mass, and (b) a photoinitiator wherein the improvement comprises dissolved in the mixture is polyacrylic-functional crosslinking monomer having less than 10 atoms in the chain between polymerizable vinyl groups and being present in an amount providing about 0.5 to 5×10 -5 diacrylate equivalent per gram of component (a).
Claim 11
Dependent Claim
45 words
A photoactive mixture as defined in claim 8, wherein component (a) includes at least one copolymerizable monomer selected from acrylic acid, methacrylic acid, itaconic acid, acrylamide, methacrylamide, an N-acryloylamino acid, and N-vinyl-2-pyrrolidone in an amount providing up to about 12% by weight of component (a).
Claim 12
Dependent Claim
38 words
A photoactive mixture as defined in claims 8 or 9 wherein component (a) is partially polymerized by virtue of a portion of the acrylic acid ester being fully polymerized and dissolved in an unpolymerized or incompletely polymerized portion.
Claim 13
Dependent Claim
19 words
A photoactive mixture as defined in claims 8 or 9, wherein the polyacrylic-functional crosslinking monomer is ethylene glycol diacrylate.
Claim 14
Dependent Claim
18 words
A photoactive mixture as defined in claims 8 or 9, wherein the polyacrylic-functional crosslinking monomer is trimethyolpropane diacrylate.
Claim 15
Dependent Claim
18 words
A photoactive mixture as defined in claims 8 or 9, wherein the polyacrylic-functional crosslinking monomer is pentaerythritol triacrylate.
Claim 16
Dependent Claim
18 words
A photoactive mixture as defined in claims 8 or 9, wherein the polyacrylic-functional crosslinking monomer is pentaerythritol tetracrylate.
Claim 17
Dependent Claim
130 words
Pressure-sensitive adhesive tape comprising a flexible backing member and a pressure-sensitive adhesive coating comprising a copolymer of (a) a partially polymerized acrylic acid ester of non-tertiary alcohol, the alkyl groups of which have an average of about 4 to 14 carbon atoms, said acrylic acid ester being per se polymerizable to a sticky, stretchable, elastic adhesive mass, and (b) at least one copolymerizable monomer selected from acrylic acid, methacrylic acid, itaconic acid, acrylamide, methacrylamide, an N-acryloylamino acid, and N-vinyl-2-pyrrolidone in an amount providing up to about 12% by weight of component (a), which adhesive coating is free from chlorine and other corrosive material, wherein the improvement comprises, the tape has an Adhesion Value as herein defined of at least 83 N/dm and a Shear Value of at least 1250 minutes.
Claim 18
Dependent Claim
130 words
Pressure-sensitive adhesive tape comprising a flexible backing member and a pressure-sensitive adhesive coating comprising a copolymer of (a) a partially polymerized acrylic acid ester of non-tertiary alcohol, the alkyl groups of which have an average of about 4 to 14 carbon atoms, said acrylic acid ester being per se polymerizable to a sticky, stretchable, elastic adhesive mass, and (b) at least one copolymerizable monomer selected from acrylic acid, methacrylic acid, itaconic acid, acrylamide, methacrylamide, an N-acryloylamino acid, and N-vinyl-2-pyrrolidone in an amount providing up to about 12% by weight of component (a), which adhesive coating is free from chlorine and other corrosive material, wherein the improvement comprises, the tape has an Adhesion Value as herein defined of at least 83 N/dm and a Shear Value of at least 1250 minutes.
Claim 19
Dependent Claim
47 words
Pressure-sensitive adhesive tape as defined in claim 15 wherein said copolymer has been crosslinked by a polyacrylic-functional crosslinking monomer having less than 10 atoms in the chain between polymerizable vinyl groups in an amount providing about 0.5 to 5×10 -5 diacrylate equivalent per gram of component (a).
Claim 20
Dependent Claim
16 words
Pressure-sensitive adhesive tape as defined in claim 16 wherein said polyacrylic-functional crosslinking monomer was trimethyolpropane triacrylate.
Claim 21
Dependent Claim
16 words
Pressure-sensitive adhesive tape as defined in claim 16 wherein said polyacrylic-functional crosslinking monomer was pentaerythritol tetracrylate.
Claim 22
Dependent Claim
17 words
Pressure-sensitive adhesive tape as defined in claim 16 wherein said polyacrylic-functional crosslinking monomer was 1,2-ethylene glycol diacrylate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-04 | 1986-10-04 | 1987-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-04 | 1990-10-04 | 1991-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-04 | 1994-10-04 | 1995-04-05 | $7700.00 | Window Closed / Lapsed |