Patent US4415615A successfully refreshed from Google Patents.
US4415615A
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Cellular pressure-sensitive adhesive product and method of making
Assignee: 3M Co
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Filing: 1982-06-01
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Granted: 1983-11-15
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Expires: 2002-06-01
Abstract
Abstract A cellular pressure-sensitive adhesive membrane comprising 15 to 85% voids that does not collapse after being briefly compressed, has remarkably good adhesion on contact with rough surfaces and remarkably good flexibility and conformability at sub-freezing temperatures.
Inventors
- 👤 Donald L. Esmay
- 👤 Gordon G. Johnson
- 👤 George F. Vesley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:12
CPC Classifications
C; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C09J7/00; C09J7/10; C09J7/30; C09J7/38; C09J7/381; C09J7/385; C09J2301/00; C09J2301/30; C09J2301/302; C09J2433/00; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/1462; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24959; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249984; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/2852; Y10T428/2878; Y10T428/2887; Y10T428/2891
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
70 words
Pressure-sensitive adhesive product comprising a cellular pressure-sensitive adhesive membrane surrounding and thereby defining a multiplicity of small voids, contituting from 15% to 85% of the volume of said membrane, the cellular adhesive membrane, when compressed 2/3 of its void thickness and released after 30 seconds, being characterized by the feature that it experiences a recovery above the line 10 on FIG. 1 of the drawing within 60 seconds after release.
Claim 2
Dependent Claim
70 words
Pressure-sensitive adhesive product comprising a cellular pressure-sensitive adhesive membrane surrounding and thereby defining a multiplicity of small voids, contituting from 15% to 85% of the volume of said membrane, the cellular adhesive membrane, when compressed 2/3 of its void thickness and released after 30 seconds, being characterized by the feature that it experiences a recovery above the line 10 on FIG. 1 of the drawing within 60 seconds after release.
Claim 3
Dependent Claim
19 words
Pressure-sensitive adhesive product as defined in claim 1 wherein the pressure-sensitive adhesive layer is tacky at ordinary room temperature.
Claim 4
Dependent Claim
23 words
Pressure-sensitive adhesive product as defined in claim 1 wherein the pressure-sensitive adhesive layer is non-tacky at room temperature but becomes tacky when heated.
Claim 5
Dependent Claim
27 words
Pressure-sensitive adhesive product as defined in claims 1, 2 or 3 wherein the average diameter of the cells of the cellular membrane does not exceed 0.3 mm.
Claim 6
Dependent Claim
26 words
Pressure-sensitive adhesive product as defined in claim 1 wherein the backing is flexible and has a low-adhesion surface from which the cellular membrane is readily removable.
Claim 7
Dependent Claim
25 words
Pressure-sensitive adhesive product as defined in claims 1, 2 or 3 wherein said pressure-sensitive adhesive polymer is a polymer of at least one acrylate monomer.
Claim 8
Dependent Claim
28 words
A laminate of a pressure-sensitive adhesive product as defined in claim 1 and a noncellular adhesive layer of not more than 1/3 the thickness of the cellular membrane.
Claim 9
Dependent Claim
33 words
Pressure-sensitive adhesive product as defined in claim 1 wherein said pressure-sensitive adhesive comprises a polymer of 50-100 parts of substituted or unsubstituted acrylate monomer and corresponding 50-0 parts of copolymerizable monoethylenically substituted monomer.
Claim 10
Dependent Claim
56 words
Pressure-sensitive adhesive product as defined in claim 8 wherein said pressure-sensitive adhesive is a copolymer of monomers consisting essentially of (1) 88-99 parts of alkyl acrylate having an average of 4-12 carbon atoms in the alkyl groups and (2) correspondingly, 12-1 parts of at least one of acrylic acid, methacrylic acid, itaconic acid, acrylamide and methacrylamide.
Claim 11
Dependent Claim
83 words
Method of making a pressure-sensitive adhesive product comprising the steps of (1) preparing a composition which has a viscosity in the rage of about 1000 to 40,000 cps and is polymerizable to a pressure-sensitive adhesive state, (2) frothing the composition, (3) coating the froth onto a backing, and (4) polymerizing the coated forth in situ to a pressure-sensitive adhesive state to provide a pressure-sensitive adhesive membrane having a cellular structure comprising 15% to 85% voids and possessing a high degree of compression recovery.
Claim 12
Dependent Claim
83 words
Method of making a pressure-sensitive adhesive product comprising the steps of (1) preparing a composition which has a viscosity in the rage of about 1000 to 40,000 cps and is polymerizable to a pressure-sensitive adhesive state, (2) frothing the composition, (3) coating the froth onto a backing, and (4) polymerizing the coated forth in situ to a pressure-sensitive adhesive state to provide a pressure-sensitive adhesive membrane having a cellular structure comprising 15% to 85% voids and possessing a high degree of compression recovery.
Claim 13
Dependent Claim
20 words
Method as defined in claim 10 wherein said composition contains a photoinitiator and step (4) involves exposure to ultraviolet radiation.
Claim 14
Dependent Claim
81 words
Method of making a pressure-sensitive adhesive product comprising the steps of (1) preparing a composition which has a viscosity in the range of about 1000 to 40,000 cps and is polymerizable to a pressure-sensitive adhesive state, (2) coating the composition onto a backing, and (3) simultaneously foaming and polymerizing the coating in situ to a pressure-sensitive adhesive state to provide a pressure-sensitive adhesive membrane having a cellular structure comprising 15% to 85% voids and possessing a high degree of compression recovery.
Claim 15
Dependent Claim
81 words
Method of making a pressure-sensitive adhesive product comprising the steps of (1) preparing a composition which has a viscosity in the range of about 1000 to 40,000 cps and is polymerizable to a pressure-sensitive adhesive state, (2) coating the composition onto a backing, and (3) simultaneously foaming and polymerizing the coating in situ to a pressure-sensitive adhesive state to provide a pressure-sensitive adhesive membrane having a cellular structure comprising 15% to 85% voids and possessing a high degree of compression recovery.
Claim 16
Dependent Claim
30 words
Method as defined in claims 10 or 12 wherein a surfactant is included in the composition in an amount within the range from 0.5 to 5% by weight total solids.
Claim 17
Dependent Claim
23 words
Method as defined in claims 10 or 12 wherein the composition has a viscosity in the range of about 5,000 to 15,000 cps.
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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) | 1986-11-14 | 1987-05-16 | 1987-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-14 | 1991-05-16 | 1991-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-14 | 1995-05-16 | 1995-11-15 | $7700.00 | Window Closed / Lapsed |