US4839416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low tack microsphere adhesive
Assignee: AMERICAN PAD AND PAPER Co OF DELAWARE Inc
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Filing: 1987-06-09
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Granted: 1989-06-13
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Expires: 2007-06-09
Abstract
Abstract Inherently tacky, elastomeric, solvent-dispersible, solvent insoluble polymeric microspheres prepared using non-ionic suspension stabilizers and non-ionic emulsifiers.
Inventors
- 👤 Richard A. Orenstein
- 👤 Arthur F. Dionne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:01
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
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
79 words
A suspension polymerization process for preparing inherently tacky elastomeric polymeric microspheres consisting essentially of the steps of: (a) charging to a reaction vessel; (i) de-ionized water; (ii) at least one non-ionic alkyl acrylate ester monomer; (iii) at least one non-ionic emulsifier; (iv) a substantially water insoluble polymerization initiator; and (v) a non-ionic suspension stabilizer; (b) agitating said charge to said reaction vessel; (c) heating said charge while maintaining said agitation; and whereby inherently tacky, elastomeric polymeric microspheres are formed.
Claim 2
Dependent Claim
79 words
A suspension polymerization process for preparing inherently tacky elastomeric polymeric microspheres consisting essentially of the steps of: (a) charging to a reaction vessel; (i) de-ionized water; (ii) at least one non-ionic alkyl acrylate ester monomer; (iii) at least one non-ionic emulsifier; (iv) a substantially water insoluble polymerization initiator; and (v) a non-ionic suspension stabilizer; (b) agitating said charge to said reaction vessel; (c) heating said charge while maintaining said agitation; and whereby inherently tacky, elastomeric polymeric microspheres are formed.
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein said alkyl acrylate ester monomer is 2-ethyl hexyl acrylate.
References Cited (Backward Citations)
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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) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |