US4197353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting powder coating polyesters
Assignee: Mobil Oil AS
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Filing: 1978-04-14
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Granted: 1980-04-08
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Expires: 1998-04-14
Abstract
Abstract Thermosettable polyester resin compositions, suitable for use in powder coating applications, derived from a dicarboxylic aromatic acid component (e.g., 1,4-benzenedicarboxylic acid), a trihydroxy alkyl component (e.g., 2-ethyl-2-(hydroxymethyl)-1,3-propanediol), a diol component (e.g., 2,2-dimethyl-1,3-propanediol) and a dihydroxy alkyl compound having 4 to 10 carbon atoms in the primary carbon chain between the hydroxyl moieties (e.g., 1,6-hexanediol). Polyesters of the present invention have a number average MW of from about 2,000 to about 6,000, a combined acid and hydroxyl number of about 35 to about 70 milligrams of KOH per gram of polyester, and a glass transition temperature of about 35 DEG C. to about 50 DEG C.
Inventors
- 👤 Michael A. Tobias
- 👤 George F. Salathe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:25
CPC Classifications
C; C09; C09D; C09D175/00; C09D175/04; C09D175/06; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/4208; C08G18/4211; C08G18/4219; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/807; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/20; C09D167/00; C08G2150/00; C08G2150/20; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31786; Y10T428/31794
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
161 words
A thermosettable polyester resin composition derived from a polymerization reaction mixture comprising: (a) about 55% to about 65% by weight of a dicarboxylic aromatic acid component; (b) about 2% to about 7% by weight of a trihydroxy alkyl component; (c) about 20% to about 35% by weight of 2,2-dimethyl-1,3-propanediol or a mixture thereof with a minor amount of at least one other diol of lower molecular weight than 2,2-dimethyl-1,3-propanediol; (d) about 1% to about 15% by weight of an alkyl dihydroxy compound having 4 to 10 carbon atoms in the primary carbon chain between the hydroxyl moieties; and (e) in which mixture the aforesaid components (a) through (d), inclusive, are in a combination such that the resulting polyester has a number average molecular weight of from about 2,000 to about 6,000, a combined acid and hydroxyl number of about 35 to about 70 mg KOH per gram of polyester, and a glass transition temperature of about 35° C. to 50° C.
Claim 2
Dependent Claim
161 words
A thermosettable polyester resin composition derived from a polymerization reaction mixture comprising: (a) about 55% to about 65% by weight of a dicarboxylic aromatic acid component; (b) about 2% to about 7% by weight of a trihydroxy alkyl component; (c) about 20% to about 35% by weight of 2,2-dimethyl-1,3-propanediol or a mixture thereof with a minor amount of at least one other diol of lower molecular weight than 2,2-dimethyl-1,3-propanediol; (d) about 1% to about 15% by weight of an alkyl dihydroxy compound having 4 to 10 carbon atoms in the primary carbon chain between the hydroxyl moieties; and (e) in which mixture the aforesaid components (a) through (d), inclusive, are in a combination such that the resulting polyester has a number average molecular weight of from about 2,000 to about 6,000, a combined acid and hydroxyl number of about 35 to about 70 mg KOH per gram of polyester, and a glass transition temperature of about 35° C. to 50° C.
Claim 3
Dependent Claim
34 words
The thermosettable polyester resin composition of claim 1 in which the dicarboxylic aromatic acid component (a) is 1,4-benzenedicarboxylic acid or mixtures of 1,4-benzenedicarboxylic acid with a minor amount of 1,3-benzenedicarboxylic acid or 1,2-benzenedicarboxylic anhydride.
Claim 4
Dependent Claim
28 words
The thermosettable polyester resin composition of claim 1 in which the trihydroxy alkyl component (b) is a compound having the formula: ##STR1## wherein R is hydrogen or alkyl.
Claim 5
Dependent Claim
12 words
The composition of claim 3 wherein the trihydroxy alkyl component is 2-ethyl-2(hydroxymethyl)-1,3-propanediol.
Claim 6
Dependent Claim
12 words
The composition of claim 3 wherein the trihydroxy alkyl component is 2-(hydroxymethyl)-2-methyl-1,3-propanediol.
Claim 7
Dependent Claim
17 words
The composition of claim 3 wherein the trihydroxy alkyl component is a mixture of 2-ethyl-2(hydroxymethyl)-1,3-propanediol and 2-(hydroxymethyl)-2-methyl-1,3-propanediol.
Claim 8
Dependent Claim
16 words
The thermosettable polyester resin composition of claim 1 wherein the dihydroxy alkyl compound (d) is 1,6-hexanediol.
Claim 9
Dependent Claim
26 words
A thermosetting powder coating composition comprising the polyester resin composition of claim 1 and further comprising a cross-linking agent, a flow control agent and a catalyst.
Claim 10
Dependent Claim
13 words
The thermosetting powder coating composition of claim 8 further comprising a pigmenting material.
Claim 11
Dependent Claim
14 words
A metal substrate coated with the powder coating composition of claim 9 and baked.
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) | 1983-04-08 | 1983-10-08 | 1984-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-08 | 1987-10-08 | 1988-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-08 | 1991-10-08 | 1992-04-08 | $7700.00 | Window Closed / Lapsed |