US5147934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting powdery coating composition
Assignee: BASF Japan Ltd
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Filing: 1990-10-30
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Granted: 1992-09-15
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Expires: 2010-10-30
Abstract
Abstract The thermosetting powdery coating composition of the invention comprises (A) from 40 to 98 parts by weight of a fluorinecontaining copolymer, which is a copolymer of a fluoroolefin and a comonomer having a crosslinkable reactive group, e.g., hydroxy, carbonyl, amino and glycidyl groups, containing at least 10% by weight of fluorine and having an intrinsic viscosity of 0.05-2 dl/g (30° C., tetrahydrofuran) and a glass transition temperature of 30°-120° C. and (B) from 60 to 2 parts by weight of a curing agent capable of forming crosslinks by reacting with the crosslinkable reactive groups in (A). The powdery coating composition of the invention is excellent in the dispersibility of pigments and efficiency in the coating works therewith and capable of giving a coating film having improved adhesion to the substrate surface, surface luster, impact resistance and insusceptibility to stain.
Inventors
- 👤 Haruki Ito
- 👤 Kenzou Maeda
- 👤 Nobuyuki Miyazaki
- 👤 Masao Unoki
- 👤 Chiaki Sagawa
- 👤 Motoi Kamba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:39
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/03; C09D127/00; C09D127/02; C09D127/12; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6275; C08G18/6279; C08K; C08K5/00; C08K5/0008; C08K5/0025; C09D127/18; Y; Y10; Y10S; Y10S524/00; Y10S524/904; Y10S525/00; Y10S525/934
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
126 words
A thermosetting powdery coating composition which comprises, in admixture: (A) from 40 to 98 parts by weight of a fluorine-containing copolymer comprising a monomeric moiety derived from a fluoroolefin compound and having hydroxyl groups as the crosslinkable reactive groups of which the content of fluorine is at least 10% by weight, the intrinsic viscosity determined at 30° C. in tetrahydrofuran is in the range from 0.05 to 2 dl/g, the glass transition temperature is in the range from 35° C. to 120° C. and the weight loss by heating does not exceed 2%; and (B) from 60 to 2 parts by weight of a blocked isocyanate compound as the curing agent capable of forming crosslinks by reacting with the crosslinkable reactive groups in the fluorine-containing copolymer.
Claim 2
Dependent Claim
126 words
A thermosetting powdery coating composition which comprises, in admixture: (A) from 40 to 98 parts by weight of a fluorine-containing copolymer comprising a monomeric moiety derived from a fluoroolefin compound and having hydroxyl groups as the crosslinkable reactive groups of which the content of fluorine is at least 10% by weight, the intrinsic viscosity determined at 30° C. in tetrahydrofuran is in the range from 0.05 to 2 dl/g, the glass transition temperature is in the range from 35° C. to 120° C. and the weight loss by heating does not exceed 2%; and (B) from 60 to 2 parts by weight of a blocked isocyanate compound as the curing agent capable of forming crosslinks by reacting with the crosslinkable reactive groups in the fluorine-containing copolymer.
Claim 3
Dependent Claim
27 words
The thermosetting powdery coating composition of claim 1 wherein the fluoroolefin compound is selected from the group consisting of tetrafluoroethylene, chlorotrifluoroethylene, trifluoroethylene, vinylidene, fluoride, hexafluoropropylene and pentafluoropropylene.
Claim 4
Dependent Claim
27 words
The thermosetting powdery coating composition of claim 1 wherein the content of fluorine in the fluorine-containing copolymer is in the range from 15 to 72% by weight.
Claim 5
Dependent Claim
34 words
The thermosetting powdery coating composition of claim 1 wherein the fluorine-containing copolymer is a copolymer of a monomeric mixture comprising a fluoroolefin compound and a comonomer copolymerizable therewith and having a crosslinkable reactive group.
Claim 6
Dependent Claim
23 words
The thermosetting powdery coating composition of claim 4 wherein the monomeric mixture contains from 30 to 70% by moles of the fluoroolefin compound.
Claim 7
Dependent Claim
25 words
The thermosetting powdery coating composition of claim 1 wherein the fluorine-containing copolymer has a hydroxyl value in the range from 1 to 200 mg KOH/g.
Claim 8
Dependent Claim
24 words
The thermosetting powdery coating of claim 1 wherein the fluorine-containing copolymer has a hydroxyl value in the range from 20 to 140 mg KOH/g.
Claim 9
Dependent Claim
22 words
The thermosetting powdery coating composition of claim 7 wherein the glass transition temperature is in the range from 45° to 120° C.
Claim 10
Dependent Claim
36 words
The thermosetting powdery coating composition as claimed in claim 8, wherein the fluorine-containing copolymer is a copolymer of a monomeric mixture comprising a fluoroolefin compound and a comonomer copolymerizable therewith and having a crosslinkable reactive group.
Claim 11
Dependent Claim
25 words
The thermosetting powdery coating composition as claimed in claim 9 wherein the monomeric mixture contains from 30 to 70% by moles of the fluoroolefin compound.
Claim 12
Dependent Claim
22 words
The thermosetting powdery coating composition of claim 1 wherein the glass transition temperature is in the range from 45° to 120° C.
Claim 13
Dependent Claim
23 words
The thermosetting powdery coating composition as claimed in claim 9 wherein (A) and (B) are in a weight ratio of 50:50 to 97:3.
Claim 14
Dependent Claim
20 words
The thermosetting powdery coating composition as claimed in claim 12, wherein the glass transition temperature is 35° to 100° C.
Claim 15
Dependent Claim
21 words
The thermosetting powdery coating composition as claimed in claim 13, wherein the composition has a particle diameter not exceeding 400 μm.
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) | 1995-09-15 | 1996-03-16 | 1996-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-15 | 2000-03-16 | 2000-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-15 | 2004-03-16 | 2004-09-15 | $7700.00 | Window Closed / Lapsed |