US4634754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorine-containing copolymer and composition containing the same for curing
Assignee: Daikin Industries Ltd
•
Filing: 1985-07-17
•
Granted: 1987-01-06
•
Expires: 2005-07-17
Abstract
Abstract A fluorine-containing copolymer comprising structural units of the formula (a): -CH2-CHF-(a) structural units of the formula (b): <IMAGE> (b) and structural units of the formula (c): <IMAGE> (c) wherein X is -H or -F, Y is -OH, -COOH or <IMAGE> l is 0 or an integar of 1, m is 0 or an integar of 1 to 6 and n is 0 or an integer of 1 to 4, provided that Y is -COOH when n is 0. The copolymer has a good solubility to solvent and is cross-linkable, and the composition containing the copolymer can be cured at room temperature, and provides a film having an excellent chemical resistance, weatherability, stain resistance, heat resistance and high frictional electrification property.
Inventors
- 👤 Akira Ohmori
- 👤 Nobuyuki Tomihashi
- 👤 Yoshiki Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:36
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/184; C08L; C08L27/00; C08L27/02; C08L27/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
107 words
A fluorine-containing copolymer comprising 20 to 70% by mole of structural units of the formula (a): --CH.sub.2 --CHF-- (a) 20 to 70% by mole of structural units of the formula (b): ##STR20## and 0.5 to 30% by mole of structural units of the formula (c): ##STR21## wherein X is --H or --F, Y is --OH, --COOH or ##STR22## l is 0 or 1, m is 0 or an integer of 1 to 6 and n is 0 or an integer of 1 to 4, provided that Y is --COOH when n is 0 and provided that m and n are not both zero when l is 1.
Claim 2
Dependent Claim
107 words
A fluorine-containing copolymer comprising 20 to 70% by mole of structural units of the formula (a): --CH.sub.2 --CHF-- (a) 20 to 70% by mole of structural units of the formula (b): ##STR20## and 0.5 to 30% by mole of structural units of the formula (c): ##STR21## wherein X is --H or --F, Y is --OH, --COOH or ##STR22## l is 0 or 1, m is 0 or an integer of 1 to 6 and n is 0 or an integer of 1 to 4, provided that Y is --COOH when n is 0 and provided that m and n are not both zero when l is 1.
Claim 3
Dependent Claim
24 words
The copolymer of claim 1, wherein the molecular weight of the popolymer is from 10,000 to 500,000 when measured by a gel permeation chromatography.
Claim 4
Dependent Claim
21 words
The copolymer of claim 1, which further contains as ethylenically unsaturated monomer unit other than said units (a), (b) and (c).
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) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |