US4950537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colored foamlike pressure-sensitive adhesive tape
Assignee: 3M Co
•
Filing: 1989-02-22
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Granted: 1990-08-21
•
Expires: 2009-02-22
Abstract
Abstract The invention relates to a foamlike pressure-sensitive adhesive tape comprising a flexible carrier supporting one or more pressure-sensitive adhesive layers, at least one layer of the pressure-sensitive adhesive having pigment-coated microbubbles dispersed therein having an average diameter from 5 to 200 micrometers, wherein the coat comprises pigment particle aggregates having an average pigment aggregate size being from about 0.5 microns to about 5 microns. The invention further relates to pigment-coated microbubbles, and to a method for making coated microbubbles involving rolling the pigment and the microbubbles in a cylindrical container with two or more mixing rods having lengths at least about equal to the interior diameter of the container, and a combined surface area at least about 5% of the interior surface area of the container.
Inventors
- 👤 George F. Vesley
- 👤 Patrick G. Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:27
CPC Classifications
C; C08; C08K; C08K9/00; C08K9/12; C09; C09C; C09C1/00; C09C1/0081; C09J; C09J133/00; C09J133/04; C09J133/06; C09J133/08; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/385; C01; C01P; C01P2002/00; C01P2002/80; C01P2002/84; C01P2004/00; C01P2004/50; C01P2004/60; C01P2004/61; C01P2004/80; C01P2004/82; C01P2004/84; C01P2006/00; C01P2006/10; C01P2006/60; C01P2006/62; C01P2006/63; C01P2006/64; C08L; C08L2205/00; C08L2205/14; C08L2205/18; C08L2205/20; C09J2301/00; C09J2301/30; C09J2301/302; C09J2301/40; C09J2301/412; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2809; Y10T428/2848; Y10T428/2852; Y10T428/2878; Y10T428/2887; Y10T428/2891
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
70 words
A foamlike pressure-sensitive adhesive tape comprising a flexible carrier supporting one or more pressure-sensitive adhesive layers, at least one layer of said pressure-sensitive adhesive comprising from about 5 to about 65 volume percent pigment-coated microbubbles dispersed therein, said microbubbles having an average diameter from 5 to 200 micrometers, wherein said pigment coat comprises pigment particle aggregates with an average aggregate size being from about 0.5 microns to about 5 microns.
Claim 2
Dependent Claim
70 words
A foamlike pressure-sensitive adhesive tape comprising a flexible carrier supporting one or more pressure-sensitive adhesive layers, at least one layer of said pressure-sensitive adhesive comprising from about 5 to about 65 volume percent pigment-coated microbubbles dispersed therein, said microbubbles having an average diameter from 5 to 200 micrometers, wherein said pigment coat comprises pigment particle aggregates with an average aggregate size being from about 0.5 microns to about 5 microns.
Claim 3
Dependent Claim
14 words
The foamlike pressure-sensitive adhesive tape of claim 1 wherein said pigment-coated microbubbles are glass.
Claim 4
Dependent Claim
14 words
Pressure-sensitive adhesive tape as defined in claim 1 wherein said pigment-coated microbubbles are polymeric.
Claim 5
Dependent Claim
22 words
Pressure-sensitive adhesive tape as defined in claim 1 wherein the average diameter of said pigment-coated microbubbles is from 20 to 80 micrometers.
Claim 6
Dependent Claim
46 words
Pressure-sensitive adhesive tape as defined in claim 1 wherein said pressure-sensitive adhesive layers comprise at least one copolymer of monomers comprising (a) acrylic acid ester of nontertiary alcohol, the molecules of which contain from 1 to about 14 carbon atoms, and (b) a polar copolymerizable monomer.
Claim 7
Dependent Claim
26 words
A pressure-sensitive adhesive tape according to claim 5 wherein at least a major proportion of said molecules contain from about 4 to about 12 carbon atoms.
Claim 8
Dependent Claim
17 words
A pressure-sensitive adhesive tape according to claim 5 wherein said pressure-sensitive adhesive further comprises a crosslinking agent.
Claim 9
Dependent Claim
85 words
A pressure-sensitive adhesive tape according to claim 1 wherein said pressure sensitive adhesive comprises (a) from about 85 parts to about 99 parts of isooctyl acrylate, and correspondingly, from about 1 to about 15 parts of a strongly polar copolymerizable monomer selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, acrylamide and methacrylamide, and (b) from about 0.01 part to about 1 part of a crosslinking agent selected from the group consisting of hexanedioldiacrylate, lower-alkoxylated amino formaldehyde condensates, and alkoxy substituted 2,4-bis(trichloromethyl)-s-triazines.
Claim 10
Dependent Claim
76 words
A pressure-sensitive adhesive tape according to claim 1 wherein said pressure-sensitive adhesive comprises (a) a polymer of 70-100 parts of substituted or unsubstituted acrylate monomer and correspondingly 30-0 parts of a moderately polar copolymerizable monomer selected from the group consisting of N-vinylpyrrolidone, N-vinylcaprolactam, vinyl chloride and acrylonitrile, and (b) from about 0.01 part to about 1 part of a crosslinking agent selected from the group consisting of hexandioldiacrylate, lower-alkoxylated amino formaldehyde condensates, and alkoxy substituted 2,4-bis(trichloromethyl)-s-triazines.
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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) | 1993-08-20 | 1994-02-19 | 1994-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-20 | 1998-02-19 | 1998-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-20 | 2002-02-19 | 2002-08-21 | $7700.00 | Window Closed / Lapsed |