US4303567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of thinlayer polyester coatings
Assignee: Bayer AG
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Filing: 1980-06-05
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Granted: 1981-12-01
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Expires: 2000-06-05
Abstract
Abstract Monomer-free aqueous dispersions of air-drying unsaturated polyesters can be hardened to thin coatings in the presence of accelerators, but in the absence of common initiators, if the chemical structure of the polyester meets specific requirements.
Inventors
- 👤 Walter Frank
- 👤 Otto Bendszus
- 👤 Hansjoachim Freier
- 👤 Hans-Joachim Traenckner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:43
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/68; C08K; C08K5/00; C08K5/01; C08L; C08L29/00; C08L29/02; C08L29/04; C08L67/00; C08L67/06; C09; C09D; C09D167/00; C09D167/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
57 words
A process for the production of a thin-layer coating, characterized in that a monomer-free aqueous dispersion of at least one α,β-ethylenically unsaturated polyester containing from 0.2 to 0.8 mole of β,γ-ethylenically unsaturated ether groups per 100 g of polyester, is polymerized in the presence of an accelerator, but in the absence of a standard external polymerization initiator.
Claim 2
Dependent Claim
57 words
A process for the production of a thin-layer coating, characterized in that a monomer-free aqueous dispersion of at least one α,β-ethylenically unsaturated polyester containing from 0.2 to 0.8 mole of β,γ-ethylenically unsaturated ether groups per 100 g of polyester, is polymerized in the presence of an accelerator, but in the absence of a standard external polymerization initiator.
Claim 3
Dependent Claim
29 words
A process as claimed in claim 1, characterized in that the aqueous dispersion contains from 0.05 to 2% by weight, based on the aqueous dispersion, of a sealing agent.
Claim 4
Dependent Claim
33 words
A process as claimed in claim 2 characterized in that ripening time is avoided by the addition of from 0.03 to 1% by weight, based on the aqueous dispersion, of a basic compound.
Claim 5
Dependent Claim
47 words
A process as claimed in claim 1, characterized in that the aqueous dispersion additionally contains at least one member selected from the group consisting of polyfunctional aliphatic and cycloaliphatic isocyanates in an amount corresponding to from 0.005 to 0.1 mole of NCO per 100 g of polyester.
Claim 6
Dependent Claim
148 words
A process as claimed in claim 1, characterized in that a second polyester is used as dispersant so that the polyester component of the dispersion consists of a. from 50 to 95% by weight, based on the sum of a and b, of at least one α,β-ethylenically unsaturated polyester containing from 0.2 to 0.8 mole of β,γ-ethylenically unsaturated ether groups per 100 g of polyester a, but no co-condensing polyalkylene glycol residues having molecular weights of from 250 to 2000, and b. from 5 to 50% by weight, based on the sum of a and b, of at least one α,β-ethylenically unsaturated polyester of which from 25 to 90% by weight, based on b, consists of co-condensed polyalkylene glycol residues having a molecular weight of from 250 to 2000 and which contains from 0.16 to 0.5 mole of β,γ-ethylenically unsaturated ether groups per 100 g of polyester b.
Claim 7
Dependent Claim
168 words
A process as claimed in claim 1, characterized in that a second polyester is used as dispersant so that the polyester component of the dispersion consists of a. from 50 to 95% by weight, based on the sum of a and b, of at least one α,β-ethylenically unsaturated polyester containing from 0.2 to 0.8 mole of β,γ-ethylenically unsaturated ether groups per 100 g of polyester a, but no co-condensed polyalkylene glycol residues having a molecular weight of from 250 to 2000, and b. from 5 to 50% by weight, based on the sum of a and b, of at least one α,β-ethylenically unsaturated polyester of which from 25 to 90% by weight, based on b, consists of co-condensed polyalkylene glycol residues having a molecular weight of from 250 to 2000 and which contains per 100 g of polyester b from 0.02 to 0.2 mole of saturated aliphatic terminal groups formed by residues of at least one member selected from the group consisting of monocarboxylic acids and monofunctional alcohols.
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) | 1984-11-30 | 1985-06-01 | 1985-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-30 | 1989-06-01 | 1989-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-30 | 1993-06-01 | 1993-12-01 | $7700.00 | Window Closed / Lapsed |