US4045392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkyd resin manufacturing process by using water or steam to reverse or retard gelation
Assignee: EIDP Inc
•
Filing: 1975-03-11
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Granted: 1977-08-30
•
Expires: 1995-03-11
Abstract
Abstract An improved alkyd resin manufacturing process in which the alkyd resin is prepared by esterifying a polybasic acid and a polyhydric alcohol under reaction temperature conditions and water from the esterification is removed from the process; in the event gelation of the alkyd resin occurs in the process, the improvement that is used is the addition of sufficient water or steam while the alkyd resin is maintained at about reaction temperature conditions to reverse the gelation of the alkyd resin to form a gel-free liquid composition of the alkyd resin. Also, water or steam can be used in an alkyd resin manufacturing process to prevent or retard gelation of the resin. Alkyd resins are widely used in paints and varnishes which are used for finish for wood, metal, polymer reinforced fiberglass and the like.
Inventors
- 👤 William B. Callahan
- 👤 B. Frank Coe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:59
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/46; C08G63/48
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
103 words
In a process for the manufacture of liquid alkyd resins which comprises esterifying a polybasic acid with a polyhydric alcohol under reaction temperature conditions and removing water as formed in the process; in the event gelation of the alkyd resin occurs in the process, the improvement in combination therewith which comprises the addition of sufficient steam at a rate of at least 0.02% by weight, based on the weight of the alkyd resin, per minute until a gel free composition is formed to reverse the gelation of the alkyd resin while maintaing the alkyd resin at reaction temperature conditions of about 200°-275° C.
Claim 2
Dependent Claim
103 words
In a process for the manufacture of liquid alkyd resins which comprises esterifying a polybasic acid with a polyhydric alcohol under reaction temperature conditions and removing water as formed in the process; in the event gelation of the alkyd resin occurs in the process, the improvement in combination therewith which comprises the addition of sufficient steam at a rate of at least 0.02% by weight, based on the weight of the alkyd resin, per minute until a gel free composition is formed to reverse the gelation of the alkyd resin while maintaing the alkyd resin at reaction temperature conditions of about 200°-275° C.
Claim 3
Dependent Claim
30 words
The process of claim 1 in which steam is added at a rate of about 0.05 to 3% by weight, based on the weight of the alkyd resin, per minute.
Claim 4
Dependent Claim
38 words
The process of claim 2 in which the alkyd resin is manufactured by a solution process in which the polybasic acid and polyhydric alcohol are dissolved in a solvent for the constituents and for the resulting alkyd resin.
Claim 5
Dependent Claim
21 words
The process of claim 2 in which the alkyd resin is manufactured by a fusion process without the presence of solvent.
Claim 6
Dependent Claim
28 words
The process of claim 2 in which the alkyd resin is the esterification product of a drying oil, a polyfunctional polyol and an aromatic dicarboxylic acid or anhydride.
Claim 7
Dependent Claim
23 words
The process of claim 5 in which the alkyd resin is the esterification product of linseed oil, tung oil, glycerin and phthalic anhydride.
Claim 8
Dependent Claim
26 words
The process of claim 5 in which the alkyd resin is the esterification product of soya bean oil, heat-bodied soya bean oil, pentaerythritol, and phahtlic anhydride.
Claim 9
Dependent Claim
93 words
In a process for the manufacture of a liquid alkyd resin composition which comprises esterifying a polybasic acid with a polyhydric alcohol under reaction temperature conditions and removing water as formed in the process; the improvement used therewith which comprises the addition of sufficient steam at a rate of 0.05 to 3.0% by weight, based on the weight of the alkyd resin, per minute to retard gelation of the alkyd resin to form a gel-free composition of the alkyd resin while maintaining the alkyd resin at reaction temperature conditions of about 200°-275° C.
Claim 10
Dependent Claim
93 words
In a process for the manufacture of a liquid alkyd resin composition which comprises esterifying a polybasic acid with a polyhydric alcohol under reaction temperature conditions and removing water as formed in the process; the improvement used therewith which comprises the addition of sufficient steam at a rate of 0.05 to 3.0% by weight, based on the weight of the alkyd resin, per minute to retard gelation of the alkyd resin to form a gel-free composition of the alkyd resin while maintaining the alkyd resin at reaction temperature conditions of about 200°-275° C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |