US4598112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low tack cationic microsphere glue
Assignee: International Cube Corp
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Filing: 1984-09-14
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Granted: 1986-07-01
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Expires: 2004-09-14
Abstract
Abstract Inherently tacky, elastomeric, solvent-dispersible, solvent-insoluble, polymeric microspheres prepared using a cationic emulsifier. The tacky microspheres are particularly adapted for use as a low tack microsphere glue that can be applied to a sheet material substrate whereby the latter is provided with a reusable adhesive surface.
Inventors
- 👤 Philip H. Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:49
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/12; C08F20/16; C08F20/18; C09; C09J; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/385; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A low tack microsphere containing glue suspension for application to a substrate to provide a reusable adhesive surface, wherein the microspheres are surrounded by a cationic surfactant which prevents particle coalescence, prepared according to the process comprising the steps of: admixing, in approximate parts by weight, 2820 parts water; 54 parts of a 15% aqueous solution of polyacrylic acid having a molecular weight of 300,000 to 500,000 until said acid is dissolved, to form a solution; raising the pH of said solution to 7.0 by adding concentrated ammonium hydroxide thereto; adding 3.5 parts of a 70% active benzoyl peroxide catalyst, 1000 parts 2-ethylhexyl acrylate and 30 parts of an ethoxylated tallow amine to said solution to form a mixture; holding said mixture under a vacuum of about 25 inches of mercury with stirring for about 15 minutes; heating said mixture to about 60° C. for about 16 hours to form an aqueous suspension; and passin said suspension through a 250 micron screen to remove a small amount of unsuitable larger particle agglomerates.
Claim 2
Dependent Claim
172 words
A low tack microsphere containing glue suspension for application to a substrate to provide a reusable adhesive surface, wherein the microspheres are surrounded by a cationic surfactant which prevents particle coalescence, prepared according to the process comprising the steps of: admixing, in approximate parts by weight, 2820 parts water; 54 parts of a 15% aqueous solution of polyacrylic acid having a molecular weight of 300,000 to 500,000 until said acid is dissolved, to form a solution; raising the pH of said solution to 7.0 by adding concentrated ammonium hydroxide thereto; adding 3.5 parts of a 70% active benzoyl peroxide catalyst, 1000 parts 2-ethylhexyl acrylate and 30 parts of an ethoxylated tallow amine to said solution to form a mixture; holding said mixture under a vacuum of about 25 inches of mercury with stirring for about 15 minutes; heating said mixture to about 60° C. for about 16 hours to form an aqueous suspension; and passin said suspension through a 250 micron screen to remove a small amount of unsuitable larger particle agglomerates.
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) | 1989-06-30 | 1989-12-30 | 1990-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-30 | 1993-12-30 | 1994-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-30 | 1997-12-30 | 1998-07-01 | $7700.00 | Window Closed / Lapsed |