US4727111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder coating compositions based on mixtures of acid group-containing materials and beta-hydroxyalkylamides
Assignee: PPG Industries Ohio Inc
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Filing: 1986-09-29
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Granted: 1988-02-23
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Expires: 2006-09-29
Abstract
Abstract A thermosetting powder coating composition which has good handling properties and which has a good blend of physical properties such as appearance, flexibility, hardness, solvent resistance, corrosion resistance and exterior durability is disclosed. The composition comprises a co-reactable particulate mixture of an acid group-containing acrylic polymer; an aliphatic dicarboxylic acid containing from 4 to 20 carbon atoms per molecule and/or a polymeric polyanhydride and a beta-hydroxyalkylamide crosslinking agent.
Inventors
- 👤 Paul H. Pettit, Jr.
- 👤 Marvin L. Kaufman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:37
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/03; C09D133/00; C09D133/04; C09D133/06; C09D133/062; C09D133/064; C08; C08F; C08F8/00; C08F8/30; C08F8/46; C08L; C08L73/00; C08L73/02; Y; Y10; Y10S; Y10S525/00; Y10S525/934
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
102 words
A thermosetting powder coating composition comprising a co-reactable particulate mixture of: (A) 35-85 percent by weight based on weight of resin solids of an acid group-containing acrylic polymer having a Tg in the range of 35°-100° C.; (B) from 1-25 percent by weight based on weight of resin solids of a second carboxy group-containing material selected from the class consisting of aliphatic dicarboxylic acid containing from 4 to 20 carbon atoms per molecule and a polymeric polyanhydride including mixture thereof; and (C) a beta-hydroxyalkylamide curing agent; the equivalent ratio of beta-hydroxyalkylamide to carboxy functionality being within the range of 0.6 to 1.6:1.
Claim 2
Dependent Claim
102 words
A thermosetting powder coating composition comprising a co-reactable particulate mixture of: (A) 35-85 percent by weight based on weight of resin solids of an acid group-containing acrylic polymer having a Tg in the range of 35°-100° C.; (B) from 1-25 percent by weight based on weight of resin solids of a second carboxy group-containing material selected from the class consisting of aliphatic dicarboxylic acid containing from 4 to 20 carbon atoms per molecule and a polymeric polyanhydride including mixture thereof; and (C) a beta-hydroxyalkylamide curing agent; the equivalent ratio of beta-hydroxyalkylamide to carboxy functionality being within the range of 0.6 to 1.6:1.
Claim 3
Dependent Claim
23 words
The composition of claim 1 in which the acrylic polymer has a number average molecular weight within the range of 1500 to 15,000.
Claim 4
Dependent Claim
55 words
The composition of claim 1 in which the acrylic polymer is formed from polymerizing an alpha, beta-ethylenically unsaturated carboxylic acid selected from the class consisting of acrylic acid and methacrylic acid, a C 1 to C 20 alkyl ester of acrylic or methacrylic acid including mixtures of such esters and a polymerizable vinyl aromatic compound.
Claim 5
Dependent Claim
34 words
The composition of claim 3 which contains a C 1 to C 2 alkyl ester of acrylic or methacrylic acid and a C 4 to C 20 alkyl ester of acrylic or methacrylic acid.
Claim 6
Dependent Claim
21 words
The composition of claim 1 in which the aliphatic dicarboxylic acid containing from 4 to 20 carbon atoms is dodecanedioic acid.
Claim 7
Dependent Claim
47 words
The composition of claim 1 in which the polymeric polyanhydride is of the structure: ##STR4## where X equals hydrogen, methyl, ethyl and m equals 4 to 10 and n is a number such that the polymeric polyanhydride has a number average molecular weight of 400 to 2500.
Claim 8
Dependent Claim
27 words
The composition of claim 6 in which the polymeric polyanhydrie is selected from the class consisting of poly(adipic anhydride), poly(azelaic anhydride) and poly(dodecanedioic anhydride), including poly(mixed anhydrides).
Claim 9
Dependent Claim
13 words
The composition of claim 7 in which the polymeric polyanhydride is poly(dodecanedioic anhydride).
Claim 10
Dependent Claim
91 words
The composition of claim 1 in which the hydroxyalkylamide is of the structure: ##STR5## wherein R 1 is H or C 1 -C 5 alkyl; R 2 is H, C 1 -C 5 alkyl or ##STR6## wherein R 1 is as described above and A is a chemical bond or monovalent or polyvalent organic radical derived from saturated, unsaturated or aromatic hydrocarbon radicals including substituted hydrocarbon radicals containing from 2 to 20 carbon atoms; m equals 1 to 2 and n equals 0 to 2 and m+n is at least 2.
Claim 11
Dependent Claim
30 words
The composition of claim 1 in which (A) is present in the composition in amounts of about 40 to 75 percent by weight based on total weight of resin solids.
Claim 12
Dependent Claim
29 words
The composition of claim 1 in which (B) is present in the composition in amounts of about 5 to 20 percent by weight based on weight of resin solids.
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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) | 1991-02-22 | 1991-08-24 | 1992-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-22 | 1995-08-24 | 1996-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-22 | 1999-08-24 | 2000-02-23 | $7700.00 | Window Closed / Lapsed |