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US4005033A
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Resilient organic microspheres in mastic adhesives, sealants, caulks, coating compounds and related products, and methods of manufacture
Assignee: WASSALL USA ACQUISITION Inc A Corp OF
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Filing: 1973-05-17
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Granted: 1977-01-25
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Expires: 1993-05-17
Abstract
Abstract Improved mastic adhesives, sealants, caulks, coating compounds and related products by using in combination therewith hollow resilient organic microspheres and the method of manufacture.
Inventors
- 👤 Phillip Carl Georgeau
- 👤 Lester I. Winebrenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:05
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/34
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
110 words
Process for the preparation of a mastic adhesive composition which comprises subjecting an aqueous slurry of hollow, resilient expandable thermoplastic resinous microspheres formed of an expandable copolymer or vinylidene chloride and acrylonitrile having a diameter of about 6 to 8 microns and having incorporated therein a volatile liquid blowing agent for said thermoplastic resin, to a temperature of about 80° to 140° C. for a period of about 1 to 3 seconds whereby the blowing agent is converted to a gas causing the microspheres to expand, and then quenching to 50° to 65° C. with an aqueous mastic composition to increase the volume and decrease the weight of said adhesive.
Claim 2
Dependent Claim
110 words
Process for the preparation of a mastic adhesive composition which comprises subjecting an aqueous slurry of hollow, resilient expandable thermoplastic resinous microspheres formed of an expandable copolymer or vinylidene chloride and acrylonitrile having a diameter of about 6 to 8 microns and having incorporated therein a volatile liquid blowing agent for said thermoplastic resin, to a temperature of about 80° to 140° C. for a period of about 1 to 3 seconds whereby the blowing agent is converted to a gas causing the microspheres to expand, and then quenching to 50° to 65° C. with an aqueous mastic composition to increase the volume and decrease the weight of said adhesive.
Claim 3
Dependent Claim
29 words
Process according to claim 1 wherein said aqueous mastic composition contains about 40 to 60% by weight of an acrylic or vinyl acrylic latex binder containing about 40-60% solids.
Claim 4
Dependent Claim
15 words
Process according to claim 1 wherein said aqueous slurry contains 10 to 20% of microspheres.
Claim 5
Dependent Claim
18 words
Process according to claim 1 wherein said expanded microspheres have a diameter of about 25 to 40 microns.
Claim 6
Dependent Claim
37 words
Process according to claim 1 wherein said aqueous mastic composition is used in an amount to provide a mastic adhesive composition containing about 1.5 to 3.0% of microspheres and about 10 to 30% by weight of water.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |