Patent US4157418A successfully refreshed from Google Patents.
US4157418A
Expired / Lapsed
US
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Acrylic functional aminocarboxylic acids and derivatives as components of pressure sensitive adhesives
Assignee: 3M Co
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Filing: 1978-02-08
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Granted: 1979-06-05
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Expires: 1998-02-08
Abstract
Abstract High performance thermoplastic pressure sensitive adhesives are prepared by the copolymerization of N-(meth)-acryloylamino acids and acid derivatives with long-chained alkyl acrylates. The copolymers can be formulated into tapes that possess an excellent threefold balance of the necessary tape properties of tack, adhesion and cohesion.
Inventors
- 👤 Steven M. Heilmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:42
CPC Classifications
C; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C09J133/08; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/385; C09J2301/00; C09J2301/30; C09J2301/302; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/2878; Y10T428/2887; Y10T428/2891; Y10T428/31504; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31891; Y10T428/31909; Y10T428/31913; Y10T428/31928
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
183 words
In adhesive-coated sheet material comprising in combination a self-sustaining backing sheet having a layer of normally tacky and pressure sensitive adhesive bonded to at least one face thereof, the improvement which comprises using as adhesive a copolymer of monomers consisting essentially of (A) at least one or more monomeric acrylic acid esters of primary and/or secondary alcohol containing from 4 to 8 carbon atoms, and (B) less than 50 mole percent of at least one comonomer copolymerizable with said acrylic acid ester represented by the structural formula: ##STR3## where R 1 is H or methyl; R 2 is H, alkyl of 1-4 carbon atoms or --CH 2 CH 2 CN; R 3 is H or alkyl of 1-4 carbon atoms; R 4 is H, alkyl of 1-4 carbon atoms, --CH 2 C 6 H 5 , --CH 2 ) 2 SCH 3 , and ##STR4## where b is 1 or 2 and Y is --NH 2 or --OH; a is 0, 1, 2 or 3; X is Y and R 2 and R 3 taken together can be (CH 2 ) 3 .
Claim 2
Dependent Claim
183 words
In adhesive-coated sheet material comprising in combination a self-sustaining backing sheet having a layer of normally tacky and pressure sensitive adhesive bonded to at least one face thereof, the improvement which comprises using as adhesive a copolymer of monomers consisting essentially of (A) at least one or more monomeric acrylic acid esters of primary and/or secondary alcohol containing from 4 to 8 carbon atoms, and (B) less than 50 mole percent of at least one comonomer copolymerizable with said acrylic acid ester represented by the structural formula: ##STR3## where R 1 is H or methyl; R 2 is H, alkyl of 1-4 carbon atoms or --CH 2 CH 2 CN; R 3 is H or alkyl of 1-4 carbon atoms; R 4 is H, alkyl of 1-4 carbon atoms, --CH 2 C 6 H 5 , --CH 2 ) 2 SCH 3 , and ##STR4## where b is 1 or 2 and Y is --NH 2 or --OH; a is 0, 1, 2 or 3; X is Y and R 2 and R 3 taken together can be (CH 2 ) 3 .
Claim 3
Dependent Claim
47 words
The product of claim 1 wherein the adhesive coated sheet material is normally tacky and pressure sensitive adhesive tape which is capable of being wound convolutely upon itself in roll form, unwound therefrom without transfer of the adhesive to the backing and applied in a desired location.
Claim 4
Dependent Claim
12 words
The tape of claim 2 wherein the self-sustaining backing sheet is polyester.
Claim 5
Dependent Claim
12 words
The tape of claim 2 wherein the polyester backing sheet is polyolefin.
Claim 6
Dependent Claim
13 words
The tape of claim 2 wherein the self-sustaining backing sheet is cellulose acetate.
Claim 7
Dependent Claim
13 words
The tape of claim 2 wherein the self-sustaining backing sheet is polyvinyl chloride.
Claim 8
Dependent Claim
11 words
The tape of claim 2 wherein the self-sustaining backing is fibrous.
Claim 9
Dependent Claim
30 words
The tape of claim 2 wherein the self-sustaining backing is a low surface energy release liner and the layer of normally tacky and pressure sensitive adhesive is releasably adhered thereto.
References Cited (Backward Citations)
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Cited
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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) | 1982-06-04 | 1982-12-04 | 1983-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-04 | 1986-12-04 | 1987-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-04 | 1990-12-04 | 1991-06-05 | $7700.00 | Window Closed / Lapsed |