US4072662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyesters
Assignee: Covestro Resins BV
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Filing: 1976-07-06
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Granted: 1978-02-07
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Expires: 1996-07-06
Abstract
Abstract The invention provides novel polyesters based on 100- 75 equivalent percent of a phthalic acid, 0- 25 equivalent percent of an aliphatic dicarboxylic acid and 150- 225 equivalent percent of a C5 - C12 diol. The polyesters can be admixed with amino resins and an acid catalyst to form a coating composition which can be stoved into a hard tough coating.
Inventors
- 👤 Robert van der Linde
- 👤 Gerardus F. Meijerink
- 👤 Johan Rietberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:31
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/54; C08G63/16; C08G63/18; C09; C09D; C09D167/00; C09D167/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
67 words
A method for preparing a polyester having an acid value below 15 and a hydroxyl value of 130-400, comprising heating and reacting a mixture consisting essentially of 75-100 equivalent percent of a phthalic acid, 0-25 equivalent percent of an aliphatic dicarboxylic acid containing 4-40 carbon atoms and 150-225 equivalent percent based on total carboxylic acid equivalents of an aliphtic diol containing 5-12 carbon atoms in the molecule.
Claim 2
Independent Claim
67 words
A method for preparing a polyester having an acid value below 15 and a hydroxyl value of 130-400, comprising heating and reacting a mixture consisting essentially of 75-100 equivalent percent of a phthalic acid, 0-25 equivalent percent of an aliphatic dicarboxylic acid containing 4-40 carbon atoms and 150-225 equivalent percent based on total carboxylic acid equivalents of an aliphtic diol containing 5-12 carbon atoms in the molecule.
Claim 3
Dependent Claim
25 words
A method according to claim 1 in which the diol has 5 to 12 carbon atoms in a straight chain and two primary hydroxyl groups.
Claim 4
Dependent Claim
14 words
A method according to claim 2 in which the diol contains 5-7 carbon atoms.
Claim 5
Dependent Claim
64 words
A polyester composition consisting essentially of 75-100 equivalent percent of radicals derived from a phthalic acid, 0-25 equivalent percent of an aliphatic dicarboxylic acid containing 4-40 carbon atoms and 150-225 equivalent percent based on the total carboxylic acid equivalents of an aliphatic diol containing 5-12 carbon atoms in the molecule, the polyester having an acid value below 15 and a hydroxyl value of 130-400.
Claim 6
Dependent Claim
64 words
A polyester composition consisting essentially of 75-100 equivalent percent of radicals derived from a phthalic acid, 0-25 equivalent percent of an aliphatic dicarboxylic acid containing 4-40 carbon atoms and 150-225 equivalent percent based on the total carboxylic acid equivalents of an aliphatic diol containing 5-12 carbon atoms in the molecule, the polyester having an acid value below 15 and a hydroxyl value of 130-400.
Claim 7
Dependent Claim
27 words
A polyester composition according to claim 4 in which the aliphatic diol has 5 to 12 carbon atoms in a straight chain and two primary alcohol groups.
Claim 8
Dependent Claim
15 words
A polyester composition according to claim 5 in which the diol contains 5-7 carbon atoms.
Claim 9
Dependent Claim
19 words
A polyester composition according to claim 4 wherein said composition exhibits a viscosity at 20° C. below 4000 poise.
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) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |