US4307006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Latex of vinylidene chloride copolymer
Assignee: Kureha Corp
•
Filing: 1980-09-19
•
Granted: 1981-12-22
•
Expires: 2000-09-19
Abstract
Abstract A latex of vinylidene chloride copolymer particle which has a three-layered structure comprising 20 to 70 parts by weight of a core layer of vinylidene chloride copolymer containing 85 to 94% by weight of vinylidene chloride, 3 to 15 parts by weight of an intermediate layer of vinylidene chloride copolymer containing more than 94% by weight of vinylidene chloride and 20 to 70 parts by weight of an outer layer of vinylidene chloride copolymer containing 85 to 94% by weight of vinylidene chloride, the three layers amounting to 100 parts by weight.
Inventors
- 👤 Masayasu Suzuki
- 👤 Masaki Kobori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:40
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/08; Y; Y10; Y10S; Y10S525/00; Y10S525/902
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
92 words
A latex of vinylidene chloride copolymer particle which has a three-layered structure comprising 20 to 70 parts by weight of a core layer of vinylidene chloride compolymer containing 85 to 94% by weight of vinylidene chloride, 3 to 15 parts by weight of an intermediate layer of vinylidene chloride copolymer containing more than 94% by weight of vinylidene chloride and 20 to 70 parts by weight of an outer layer of vinylidene chloride copolymer containing 85 to 94% by weight of vinylidene chloride, the three layers amounting to 100 parts by weight.
Claim 2
Dependent Claim
92 words
A latex of vinylidene chloride copolymer particle which has a three-layered structure comprising 20 to 70 parts by weight of a core layer of vinylidene chloride compolymer containing 85 to 94% by weight of vinylidene chloride, 3 to 15 parts by weight of an intermediate layer of vinylidene chloride copolymer containing more than 94% by weight of vinylidene chloride and 20 to 70 parts by weight of an outer layer of vinylidene chloride copolymer containing 85 to 94% by weight of vinylidene chloride, the three layers amounting to 100 parts by weight.
Claim 3
Dependent Claim
16 words
The latex of claim 1 wherein the particle is 800 to 2000×10 -8 cm in diameter.
Claim 4
Dependent Claim
18 words
The latex of claim 1 wherein the thickness of the intermediate layer is 10 to 50×10 -8 cm.
Claim 5
Dependent Claim
19 words
The latex of claim 3 wherein the thickness of the intermediate layer is preferably 15 to 40×10 -8 cm.
Claim 6
Dependent Claim
48 words
The latex of claim 1 wherein the copolymer is a copolymer of vinylidene chloride with at least one comonomer selected from the group consisting of methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, octyl acrylate, methyl methacrylate, acrylonitrile, vinyl chloride, styrene, acrylic acid, methacrylic acid and itaconic acid.
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) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |