Patent US4737410A successfully refreshed from Google Patents.
US4737410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyalkyloxazoline-reinforced acrylic pressure-sensitive adhesive composition
Assignee: 3M Co
•
Filing: 1986-11-28
•
Granted: 1988-04-12
•
Expires: 2006-11-28
Abstract
Abstract Pressure-sensitive adhesives comprise blends of acrylate copolymer copositions with polyalkyloxazolines. The blends exhibit enhanced cohesive strength with balanced adhesive properties and are useful as coatings for sheet materials.
Inventors
- 👤 Steven S. Kantner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:27
CPC Classifications
C; C09; C09J; C09J129/00; C09J129/10; C09J133/00; C09J133/04; C09J133/06; C09J133/062; C08; C08L; C08L2666/00; C08L2666/02; C08L33/00; C08L33/04; C08L33/14; C08L39/00; C08L79/00; C08L79/04; C09J2301/00; C09J2301/30; C09J2301/302; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2839; Y10T428/2852; Y10T428/2857; Y10T428/2878; Y10T428/2891
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
163 words
A normally tacky pressure-sensitive adhesive composition comprising a blend of the following: a. acrylic or methacrylic copolymer having an inherent viscosity greater than about 0.2 comprising copolymerized A and B monomers wherein: A is at least one free radically polymerizable vinyl monomer, at least one of which is an acrylic or methacrylic acid ester of a non-tertiary alcohol having from 1 to 18 carbon atoms with the average number of carbon atoms being about 4-12; and B is at least one polar monomer copolymerizable with A, the amount by weight of B monomer being up to about 30% of the total weight of all monomers in the copolymer; b. up to about 150 parts by weight of compatible tackifying resin per 100 parts by weight copolymer; c. up to about 50 parts by weight of compatible plasticizer per 100 parts by weight copolymer; and d. sufficient polyalkyloxazoline of a molecular weight above about 1,000 to provide the resultant blend with increased shear strength.
Claim 2
Dependent Claim
163 words
A normally tacky pressure-sensitive adhesive composition comprising a blend of the following: a. acrylic or methacrylic copolymer having an inherent viscosity greater than about 0.2 comprising copolymerized A and B monomers wherein: A is at least one free radically polymerizable vinyl monomer, at least one of which is an acrylic or methacrylic acid ester of a non-tertiary alcohol having from 1 to 18 carbon atoms with the average number of carbon atoms being about 4-12; and B is at least one polar monomer copolymerizable with A, the amount by weight of B monomer being up to about 30% of the total weight of all monomers in the copolymer; b. up to about 150 parts by weight of compatible tackifying resin per 100 parts by weight copolymer; c. up to about 50 parts by weight of compatible plasticizer per 100 parts by weight copolymer; and d. sufficient polyalkyloxazoline of a molecular weight above about 1,000 to provide the resultant blend with increased shear strength.
Claim 3
Dependent Claim
41 words
The pressure-sensitive adhesive composition of claim 1 wherein the amount of polyalkyloxazoline in said blend is sufficient to increase the shear strength of said blend by at least about 50% relative to the shear strength of the adhesive composition without polyalkyloxazoline.
Claim 4
Dependent Claim
41 words
The pressure-sensitive adhesive composition of claim 1 wherein the amount of polyalkyloxazoline in said blend is sufficient to increase the shear strength of said blend by at least about 100% relative to the shear strength of the adhesive composition without polyalkyloxazoline.
Claim 5
Dependent Claim
19 words
The pressure-sensitive adhesive composition of claim 1 wherein the average number of carbon atoms is about 4 to 10.
Claim 6
Dependent Claim
31 words
The pressure-sensitive adhesive composition of claim 1 wherein acrylic or methylacrylic acid ester is selected from the group consisting of butyl acrylate, isooctyl acrylate, isononyl acrylate, isodecyl acrylate, and 2-ethylhexyl acrylate.
Claim 7
Dependent Claim
20 words
The pressure-sensitive adhesive composition of claim 1 wherein said polar comonomer has hydroxyl or carboxylic, sulfonic, or phosphonic acid functionality.
Claim 8
Dependent Claim
28 words
The pressure-sensitive adhesive composition of claim 1 wherein said polar comonomer is selected from the group consisting of acrylic acid, 2-carboxyethyl acrylate, itaconic acid, 2-hydroxyethylacrylate, hydroxypropylacrylate, and 2-sulfoethylmethacrylate.
Claim 9
Dependent Claim
33 words
The pressure-sensitive adhesive composition of claim 1 wherein the amount by weight of said polar comonomer is from about 1% to about 15% of the total weight of all monomers in the copolymer.
Claim 10
Dependent Claim
21 words
The pressure-sensitive adhesive composition of claim 1 wherein the inherent viscosity is in the range of about 0.4 to about 2.5.
Claim 11
Dependent Claim
24 words
The pressure-sensitive adhesive composition of claim 1 wherein the acrylic or methacrylic copolymer contains as one of the A monomers a hydrophilic macromolecular monomer.
Claim 12
Dependent Claim
59 words
The pressure-sensitive adhesive composition of claim 1 wherein said polyalkyloxazoline has a repeating unit having the following formula: ##STR3## wherein R is hydrogen or an inertly-substituted lower alkyl group, x is 1 or 2, and R 1 is selected from the group consisting of hydrogen, phenyl, inertly-substituted phenyl, alkyl having up to about 20 carbon atoms, or inertly-substituted alkyl.
Claim 13
Dependent Claim
31 words
The pressure-sensitive adhesive composition of claim 11 wherein x is 1, R is hydrogen, and R 1 is selected from hydrogen and alkyl groups containing up to about 10 carbon atoms.
Claim 14
Dependent Claim
25 words
The pressure-sensitive adhesive composition of claim 11 wherein x is 1, R is hydrogen, and R 1 is selected from hydrogen, methyl, ethyl and propyl.
Claim 15
Dependent Claim
42 words
The pressure-sensitive adhesive composition of claim 1 wherein the amount of polyalkyloxazoline is in the range of about 0.2 parts to about 25 parts by weight polyalkyloxazoline per 100 parts by weight of the combined weight of said copolymer and said polyalkyloxazoline.
Claim 16
Dependent Claim
42 words
The pressure-sensitive adhesive composition of claim 1 wherein the amount of polyalkyloxazoline is in the range of about 0.5 parts to about 10 parts by weight polyalkyloxazoline per 100 parts by weight of the combined weight of said copolymer and said polyalkyloxazoline.
Claim 17
Dependent Claim
23 words
The pressure-sensitive adhesive composition of claim 1 wherein said polyalkyloxazoline has a molecular weight within the range of about 1,000 to about 2,000,000.
Claim 18
Dependent Claim
23 words
The pressure-sensitive adhesive composition of claim 1 wherein said polyalkyloxazoline has a molecular weight within the range of about 2,000 to about 500,000.
Claim 19
Dependent Claim
23 words
A sheet material having at least a portion of at least one major surface coated with the pressure-sensitive adhesive composition of claim 1.
Claim 20
Dependent Claim
23 words
An adhesive coated tape comprising a flexible backing having at least one major surface coated with the pressure-sensitive adhesive composition of claim 1.
Claim 21
Dependent Claim
21 words
The transfer tape comprising a film of the pressure-sensitive adhesive composition of claim 1 borne on at least one release liner.
Claim 22
Dependent Claim
12 words
The pressure-sensitive adhesive composition of claim 1 further characterized by being crosslinked.
References Cited (Backward Citations)
US24906A
Cited
US31887A
Cited
USRE24906E
Cited
US3483141A
Cited
US3657396A
Cited
USRE31887E
Cited
US3740366A
Cited
US4033918A
Cited
US4337325A
Cited
US4500683A
Cited
US4370380A
Cited
US4423182A
Cited
US4436867A
Cited
US4413080A
Cited
US4474928A
Cited
US4532187A
Cited
US4554324A
Cited
US4547530A
Cited
US4678833A
Cited
US4528044A
Cited
US4562225A
Cited
US4522967A
Cited
US4582877A
Cited
US4656077A
Cited
US4645711A
Cited
US4623688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-12 | 1991-10-12 | 1992-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-12 | 1995-10-12 | 1996-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-12 | 1999-10-12 | 2000-04-12 | $7700.00 | Window Closed / Lapsed |