Patent US4296013A successfully refreshed from Google Patents.
US4296013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinylidene chloride polymer microgels
Assignee: Dow Chemical Co
•
Filing: 1979-12-13
•
Granted: 1981-10-20
•
Expires: 1999-12-13
Abstract
Abstract Discrete, crosslinked vinylidene chloride polymer microgels, having a latex particle size of less than 1 micron and a gel content of about 1 to 99 percent, such microgels being obtained by emulsion polymerizing (a) about 50 to about 95 parts by weight of vinylidene chloride, (b) about 5 to about 50 parts by weight of a copolymerizable ethylenically unsaturated comonomer, and (c) about 0.1 to about 10 parts by weight of a copolymerizable crosslinking polyfunctional comonomer. Such microgels have been found to have wide applicability as additives for synthetic foams and fibers, and for the preparation of improved coatings, films, and redispersible latexes.
Inventors
- 👤 Dale S. Gibbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:46
CPC Classifications
C; C09; C09D; C09D127/00; C09D127/02; C09D127/04; C09D127/08; C08; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
123 words
A coating latex containing discrete, cross-linked vinylidene chloride polymer microgels, said latex comprising the product obtained by emulsion polymerizing (a) about 88 to about 92 parts by weight of vinylidene chloride; (b) about 6 to about 12 parts by weight of methyl acrylate or methyl methacrylate; (c) about 1 to about 5 parts by weight of a copolymerizable crosslinking polyfunctional comonomer; and (d) about 1 to about 10 parts by weight of a comonomer selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, and fumaric acid, said microgels having a particle size of about 0.1 to about 0.5 micron, a gel content of about 1 to about 50 percent, and a second order transition temperature less than about 30° C.
Claim 2
Dependent Claim
123 words
A coating latex containing discrete, cross-linked vinylidene chloride polymer microgels, said latex comprising the product obtained by emulsion polymerizing (a) about 88 to about 92 parts by weight of vinylidene chloride; (b) about 6 to about 12 parts by weight of methyl acrylate or methyl methacrylate; (c) about 1 to about 5 parts by weight of a copolymerizable crosslinking polyfunctional comonomer; and (d) about 1 to about 10 parts by weight of a comonomer selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, and fumaric acid, said microgels having a particle size of about 0.1 to about 0.5 micron, a gel content of about 1 to about 50 percent, and a second order transition temperature less than about 30° C.
Claim 3
Dependent Claim
47 words
The latex of claim 1 obtained by emulsion polymerizing (a) about 90 parts by weight of vinylidene chloride, (b) about 10 parts by weight of methyl methacrylate, (c) about 2 parts by weight of 1,3-butylene glycol diacrylate, and (d) about 4 parts by weight of acrylic acid.
Claim 4
Dependent Claim
96 words
A coating latex containing discrete, cross-linked vinylidene chloride polymer microgels, said latex comprising the product obtained by emulsion polymerizing (a) about 90 to about 94 parts by weight of vinylidene chloride, (b) about 6 to about 10 parts by weight of methyl acrylate or methyl methacrylate, and (c) about 1 to about 5 parts by weight of a copolymerizable crosslinking polyfunctional comonomer, said microgels having a particle size of about 0.1 to about 0.5 micron, a gel content of about 1 to about 50 percent, and a second order transition temperature less than about 30° C.
Claim 5
Dependent Claim
96 words
A coating latex containing discrete, cross-linked vinylidene chloride polymer microgels, said latex comprising the product obtained by emulsion polymerizing (a) about 90 to about 94 parts by weight of vinylidene chloride, (b) about 6 to about 10 parts by weight of methyl acrylate or methyl methacrylate, and (c) about 1 to about 5 parts by weight of a copolymerizable crosslinking polyfunctional comonomer, said microgels having a particle size of about 0.1 to about 0.5 micron, a gel content of about 1 to about 50 percent, and a second order transition temperature less than about 30° C.
Claim 6
Dependent Claim
38 words
The latex of claim 3 obtained by emulsion polymerizing (a) about 92 parts by weight of vinylidene chloride, (b) about 8 parts by weight of methyl methacrylate, and (c) about 2 parts by weight of 1,3-butylene glycol diacrylate.
References Cited (Backward Citations)
GB989911A
Cited
US3424706A
Cited
US4151149A
Cited
GB2003489A
Cited
US4186259A
Cited
US4211684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |