US3852246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyesterimide resins
Assignee: Beck & Co dt GmbH
•
Filing: 1972-02-29
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Granted: 1974-12-03
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Expires: 1992-02-29
Abstract
Abstract Heat hardenable polyesterimide resins are produced from a polybasic carboxylic acid, a polyhydric alcohol, a polyvalent premary amine and at least a molar excess of a volatile glycol.
Inventors
- 👤 K Schmidt
- 👤 G Neubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:05
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/16
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
132 words
IN A PROCESS FOR THE PREPARATION OF A HEAT-HARDENABLE POLYESTERIMIDE RESIN WHICH COMPRISES THE STEPS OF REACTING AT LEAST ONE POLYBASIC CARBOXYLIC ACID OR REACTIVE DERIVATIVE THEREOF WITH AT LEAST ONE POLYHYDRIC ALCOHOL AND AT LEAST ONE POLYVALENT PRIMARY AMINE OR REACTIVE DERIVATIVE THEREOF TO FORM A POLYCONDENSATION PRODUCT CONTAINING, IN ADDITION TO ESTER GROUPS, AT LEAST ONE FIVE-MEMBERED IMIDE RING IN THE POLYMER CHAIN, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE REACTION OF THE STARTING MATERIALS TO FORM SAID POLYCONDENSATION PRODUCT IN THE PRESENCE OF A SURPLUS OF AT LEAST ONE LOWER MOLCEULAR WEIGHT, VOLATILE GLYCOL, SAID SURPLUS BEING AT LEAST 2 MOL GLYCOL PER ESTER GROUP PRESENT IN SAID POLYCONDENSATION PRODUCT, AT LEAST A PART OF THE SURPLUS OF SAID GLYCOL BEING SEPARATED OFF AFTER THE POLYCONDENSATION HAS BEEN EFFECTED.
Claim 2
Dependent Claim
132 words
IN A PROCESS FOR THE PREPARATION OF A HEAT-HARDENABLE POLYESTERIMIDE RESIN WHICH COMPRISES THE STEPS OF REACTING AT LEAST ONE POLYBASIC CARBOXYLIC ACID OR REACTIVE DERIVATIVE THEREOF WITH AT LEAST ONE POLYHYDRIC ALCOHOL AND AT LEAST ONE POLYVALENT PRIMARY AMINE OR REACTIVE DERIVATIVE THEREOF TO FORM A POLYCONDENSATION PRODUCT CONTAINING, IN ADDITION TO ESTER GROUPS, AT LEAST ONE FIVE-MEMBERED IMIDE RING IN THE POLYMER CHAIN, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE REACTION OF THE STARTING MATERIALS TO FORM SAID POLYCONDENSATION PRODUCT IN THE PRESENCE OF A SURPLUS OF AT LEAST ONE LOWER MOLCEULAR WEIGHT, VOLATILE GLYCOL, SAID SURPLUS BEING AT LEAST 2 MOL GLYCOL PER ESTER GROUP PRESENT IN SAID POLYCONDENSATION PRODUCT, AT LEAST A PART OF THE SURPLUS OF SAID GLYCOL BEING SEPARATED OFF AFTER THE POLYCONDENSATION HAS BEEN EFFECTED.
Claim 3
Dependent Claim
29 words
A process according to claim 1, wherein the reaction mixture also includes one or more hydroxycarboxylic acids and/or aminocarboxylic acids and/or aminoalcohols and/or polyvalent amines containing secondary amino groups.
Claim 4
Dependent Claim
33 words
A process according to claim 1, wherein the starting materials for the formation of said polycondensation product are reacted in an at least 20 percent by weight solution or suspension in said glycol.
Claim 5
Dependent Claim
32 words
A process according to claim 3, wherein the starting materials for the formation of said polycondensation product are reacted in 30 to 70 percent by weight solution or suspension in said glycol.
Claim 6
Dependent Claim
17 words
A process according to claim 1, wherein said glycol is ethylene glycol, 1,2-propanediol, 1,3-propanediol, or butylene glycol.
Claim 7
Dependent Claim
11 words
A heat-hardenable polyesterimide resin prepared By the process of claim 1.
Claim 8
Dependent Claim
17 words
A process according to claim 3, wherein said glycol is ethylene glycol, 1,2-propanediol, 1,3-propanediol, or butylene glycol.
Claim 9
Dependent Claim
10 words
A resin produced by heat-hardening the resin of claim 6.
References Cited (Backward Citations)
US3382203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |