US3988388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerizable organic dispersion of unsaturated polyester vinyl monomer and EVA copolymers
Assignee: Bayer AG
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Filing: 1975-02-25
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Granted: 1976-10-26
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Expires: 1995-02-25
Abstract
Abstract Pourable and pumpable, storage-stable organic dispersions which can be cured with little shrinkage comprising unsaturated polyesters, copolymerizable vinyl monomers, ethylene vinyl ester copolymers and optionally dispersing agents.
Inventors
- 👤 Heinrich Alberts
- 👤 Hansjochen Schulz-Walz
- 👤 Herbert Bartl
- 👤 Leonhard Goerden
- 👤 Klaus Schuster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:09
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J5/00; C08J5/24; C08J5/241; C08J5/244; C08J5/249; C08L; C08L67/00; C08L67/06; C08J2367/00; C08J2367/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A pourable and pumpable, storage-stable dispersion which can be cured with minimal shrinkage comprising 35-59% by weight of an unsaturated polyester, 40-64% by weight of a copolymerizable vinyl monomer, 1-20% by weight of a low shrinkage thermoplastic copolymer selected from the group consisting of ethylene/vinyl acetate copolymer, ethylene/vinyl propionate copolymer and mixtures thereof, each said copolymer containing 0.5-20% by weight of vinyl ester and said copolymer having up to 50% by weight thereof replaced by polyethylene, and 0.001-20% by weight of a dispersing agent which is an ethylene/vinyl acetate copolymer containing 60-99% by weight of vinyl acetate and having a Mooney viscosity of at least 15.
Claim 2
Dependent Claim
106 words
A pourable and pumpable, storage-stable dispersion which can be cured with minimal shrinkage comprising 35-59% by weight of an unsaturated polyester, 40-64% by weight of a copolymerizable vinyl monomer, 1-20% by weight of a low shrinkage thermoplastic copolymer selected from the group consisting of ethylene/vinyl acetate copolymer, ethylene/vinyl propionate copolymer and mixtures thereof, each said copolymer containing 0.5-20% by weight of vinyl ester and said copolymer having up to 50% by weight thereof replaced by polyethylene, and 0.001-20% by weight of a dispersing agent which is an ethylene/vinyl acetate copolymer containing 60-99% by weight of vinyl acetate and having a Mooney viscosity of at least 15.
Claim 3
Dependent Claim
73 words
A process for preparing a dispersion of claim 1 which comprises warming a solution of the unsaturated polyester in copolymerizable vinyl monomer and a solution of the low shrinkage thermoplastic copolymer to 50°-120° C., combining said warm solutions in the presence of said dispersing agent in a zone of high turbulence, withdrawing resulting mixture from said zone and stirring withdrawn mixture intensely at 50°-120° C. until a pourable state of low viscosity results.
Claim 4
Dependent Claim
18 words
A compression moulding material, injection moulding material or a resin mat prepared from a dispersion of claim 1.
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) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |