Patent US4925908A successfully refreshed from Google Patents.
US4925908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylic based emulsion polymers
Assignee: Avery Dennison Corp
•
Filing: 1987-12-11
•
Granted: 1990-05-15
•
Expires: 2007-12-11
Abstract
Abstract A removable pressure sensitive adhesive composition comprises an acrylic-based emulsion polymer having a gel content of from about 70 to about 90% comprises about 90 to 99.5 parts alkyl acrylate monomers, up to about 2 parts polar monomers and up to about one part of a multifunctional acrylate monomer.
Inventors
- 👤 Margaret Bernard
- 👤 Stansliv Berman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:03
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C09J133/08; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/385; C09J2301/00; C09J2301/30; C09J2301/302; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/2878; Y10T428/2891
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
79 words
An emulsion polymer having a gel content of from about 70% to about 90%, said emulsion polymer comprising: a. from about 90 to about 99.5 parts of at least one alkyl acrylate monomer having from one to about twelve carbon atoms in the alkyl chain; b. a positive amount of up to about 2 parts of at least one polar monomer; and c. a positive amount of up to about 1 part of at least one multifunctional acrylate monomer.
Claim 2
Dependent Claim
79 words
An emulsion polymer having a gel content of from about 70% to about 90%, said emulsion polymer comprising: a. from about 90 to about 99.5 parts of at least one alkyl acrylate monomer having from one to about twelve carbon atoms in the alkyl chain; b. a positive amount of up to about 2 parts of at least one polar monomer; and c. a positive amount of up to about 1 part of at least one multifunctional acrylate monomer.
Claim 3
Dependent Claim
19 words
An emulsion polymer as claimed in claim 1 having a gel content of from about 75% to about 83%.
Claim 4
Dependent Claim
15 words
An emulsion polymer as claimed in claim 1 comprising about 98 parts alkyl acrylate monomers.
Claim 5
Dependent Claim
30 words
An emulsion polymer as claimed in claim 1 wherein at least most of the alkyl acrylate monomers comprise from about 4 to about 8 carbon atoms in the alkyl chain.
Claim 6
Dependent Claim
16 words
An emulsion polymer as claimed in claim 1 comprising about 2 parts of a polar monomer.
Claim 7
Dependent Claim
19 words
An emulsion polymer as claimed in claim 1 comprising from about 0.1 to about 0.3 parts multifunctional acrylate monomer.
Claim 8
Dependent Claim
19 words
An emulsion polymer as claimed in claim 1 comprising a swell ratio of from about 15 to about 25.
Claim 9
Dependent Claim
19 words
An emulsion polymer as claimed in claim 7 comprising a swell ratio of from about 18 to about 23.
Claim 10
Dependent Claim
21 words
An emulsion polymer as claimed in claim 1 comprising a glass-transition temperature of from about -30° C. to about -60 C.
Claim 11
Dependent Claim
21 words
An emulsion polymer as claimed in claim 9 comprising a glass-transition temperature of from about -50° C. to about -55° C.
Claim 12
Dependent Claim
35 words
An emulsion polymer as claimed in claim 1, wherein the multifunctional acrylate monomer is selected from the group consisting of polyethylene glycol diacrylate, hexane diol diacrylate, ethoxylated trimethylpropane triacrylate, pentaerythritol triacylate and polypropylene glycol diacrylate.
References Cited (Backward Citations)
US2884126A
Cited
US3475363A
Cited
US3992485A
Cited
US3922464A
Cited
US3971766A
Cited
US3988392A
Cited
US4110290A
Cited
US4204023A
Cited
US4456734A
Cited
US4629663A
Cited
US4751269A
Cited
US4645711A
Cited
US4716194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |