US4399254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cationic latices useful for thermoplastic and thermosetting applications
Assignee: PPG Industries Inc
•
Filing: 1981-09-25
•
Granted: 1983-08-16
•
Expires: 2001-09-25
Abstract
Abstract A process for preparing stable latices with cationic surfactants having their gegen-ions derived from methanesulfonic acid; the cationic surfactant is present in relatively low but effective concentrations.
Inventors
- 👤 Suryya K. Das
- 👤 Charles M. Kania
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:16
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/22; C08F2/24; C08F2/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
40 words
A process for preparing a stable cationic acrylic latex; said process comprises copolymerizing ethylenically unsaturated monomers in an acidic medium in the presence of a cationic surfactant in which the gegen-ion of the cationic surfactant is derived from methanesulfonic acid.
Claim 2
Dependent Claim
40 words
A process for preparing a stable cationic acrylic latex; said process comprises copolymerizing ethylenically unsaturated monomers in an acidic medium in the presence of a cationic surfactant in which the gegen-ion of the cationic surfactant is derived from methanesulfonic acid.
Claim 3
Dependent Claim
17 words
A process of claim 1, wherein at least one of the ethylenically unsaturated monomers is amino group-containing.
Claim 4
Dependent Claim
10 words
A cationic acrylic latex prepared as recited in claim 1.
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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) | 1986-08-15 | 1987-02-14 | 1987-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-15 | 1991-02-14 | 1991-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-15 | 1995-02-14 | 1995-08-16 | $7700.00 | Window Closed / Lapsed |