Claims
- 1. 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.
- 2. The foamlike pressure-sensitive adhesive tape of claim 1 wherein said pigment-coated microbubbles are glass.
- 3. Pressure-sensitive adhesive tape as defined in claim 1 wherein said pigment-coated microbubbles are polymeric.
- 4. Pressure-sensitive adhesive tape as defined in claim 1 wherein the average diameter of said pigment-coated microbubbles is from 20 to 80 micrometers.
- 5. 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.
- 6. 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.
- 7. A pressure-sensitive adhesive tape according to claim 5 wherein said pressure-sensitive adhesive further comprises a crosslinking agent.
- 8. 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.
- 9. 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.
BACKGROUND OF THE INVENTION
This application is a continuation-in-part of U.S. Ser. No. 143,461, filed Jan. 13, 1988, now abandoned.
US Referenced Citations (22)
Non-Patent Literature Citations (2)
Entry |
JP49-73420 Production of Colored, Hollow Micro-Spheres, Nov. 19, 1982, Patent Kokai (Laid Open) Publication. |
JP57-188435 Method for Producing Architectural and Construction Materials, Jul. 16, 1974 Patent Kokai (Laid Open) Publication. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
143461 |
Jan 1988 |
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