Process for producing powder coating composition, powder coating composition, and method of coating film formation
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B05D-001/36
C08L-063/00
출원번호
US-0926632
(2001-03-29)
우선권정보
JP-0092314 (2000-03-29)
국제출원번호
PCT//JP01/02635
(2001-11-27)
§371/§102 date
20011127
(20011127)
국제공개번호
WO01//72916
(2001-10-04)
발명자
/ 주소
Okada, Katsuhiko
Agawa, Tetsuro
Shinohara, Kouji
Konishi, Yoshitaka
출원인 / 주소
Dainippon Ink and Chemicals, Inc.
Liquid Gas Co., Ltd.
대리인 / 주소
Armstrong, Kratz, Quintos, Hanson &
인용정보
피인용 횟수 :
0인용 특허 :
4
초록▼
A powder coating is provided which does not require a long complicated production process, can be produced easily and with no danger of gelling occurring during production, and which forms a paint film with superior smoothness and with no film defects such as bubbles or pinholes. A powder coating ra
A powder coating is provided which does not require a long complicated production process, can be produced easily and with no danger of gelling occurring during production, and which forms a paint film with superior smoothness and with no film defects such as bubbles or pinholes. A powder coating raw materials solution comprising as essential constituents a room temperature solid main constituent resin (A) with a curable reactive group, a room temperature solid curing agent (B) which reacts with the curable reactive group of the main constituent resin (A), and an organic solvent (C), is spray dried at a temperature at which the main constituent resin (A) and the curing agent (B) undergo no substantial curing reaction.
대표청구항▼
1. A method of producing a powder coating, wherein a powder coating raw materials solution comprising as essential constituents a room temperature solid main constituent resin (A) with a curable reactive group, a room temperature solid curing agent (B) which reacts with said curable reactive group o
1. A method of producing a powder coating, wherein a powder coating raw materials solution comprising as essential constituents a room temperature solid main constituent resin (A) with a curable reactive group, a room temperature solid curing agent (B) which reacts with said curable reactive group of said main constituent resin (A), and an organic solvent (C) incorporating a high boiling point organic solvent (C1) with a boiling point at atmospheric pressure of 150 to 300° C., is spray dried at a temperature at which said main constituent resin (A) and said curing agent (B) undergo no substantial curing reaction, an moreover under conditions where either one of a portion of, and all of, said high boiling point organic solvent (C1) remains, yielding a powder coating in which a percentage content of said high boiling point organic solvent (C1) is from 0.005 to 1% by weight, and wherein the amount of said high boiling point organic solvent (C1) used is from 0.005 to 1 part by weight relative to 100 parts of solid matter in the powder coating raw materials solution.2. A method of producing a powder coating according to claim 1, wherein said powder coating raw materials solution utilizes a raw materials solution comprising as essential constituents, a room temperature solid main constituent resin (A) with a curable reactive group, a room temperature solid curing agent (B) which reacts with said curable reactive group of said main constituent resin (A), an organic solvent (C) incorporating a high boiling point organic solvent (C1) with a boiling point at atmospheric pressure of 150 to 300° C., and a pigment (D).3. A method of producing a powder coating according to claim 2, wherein spray drying is performed following color adjustment of said powder coating raw materials solution.4. A method of producing a powder coating, wherein a powder coating raw materials solution comprising as essential constituents a room temperature solid main constituent resin (A) with a curable reactive group, a room temperature solid curing agent (B) which reacts with said curable reactive group of said main constituent resin (A), and an organic solvent (C) incorporating a high boiling point organic solvent (C1) with a boiling point at atmospheric pressure of 150 to 300° C., is spray dried at a temperature at which said main constituent resin (A) and said curing agent (B) undergo no substantial curing reaction, and moreover under conditions where either one of a portion of, and all of, said high boiling point organic solvent (C1) remains, yielding a powder coating in which a percentage content of said high boiling point organic solvent (C1) is from 0.005 to 1% by weight, and wherein organic solvent with a boiling point at atmospheric pressure of no more than 100° C. accounts for at least 65% by weight of said organic solvent (C).5. A method of producing a powder coating according to claim 1, wherein said curable reactive group of said main constituent resin (A) is at least one group selected from a group consisting of epoxy groups, carboxyl groups and hydroxyl groups.6. A method of producing a powder coating according to claim 1, wherein at least one curable reactive group of said main constituent resin (A) is an epoxy group, and said curing agent (B) is an aliphatic dibasic acid.7. A method of producing a powder coating according to claim 6, wherein said aliphatic dibasic acid is dodecanedioic acid.8. A method of producing a powder coating according to claim 6, wherein said organic solvent (C) incorporates an alcohol of 4 carbon atoms or fewer, and amount of said alcohol of 4 carbon atoms or fewer, relative to an amount of said aliphatic dibasic acid incorporated within said powder coating raw materials solution, is a weight ratio of at least four fold.9. A method of producing a powder coating according to claim 1, wherein said powder coating raw materials solution is spray dried at 40 to 130° C.10. A powder coating comprising a room temperature solid main constituent resin (A) with a curable reactive group, a room temperature solid curing agent (B) which reacts with said curable reactive group of said main constituent resin (A), and a high boiling point organic solvent (C1) with a boiling point at atmospheric pressure of 150 to 300° C., wherein a proportion of said high boiling point organic solvent (C1) is from 0.005 to 1% by weights,wherein at least one curable reactive group of said main constituent resin (A) is an epoxy group, and said curing agent (B) is an aliphatic dibasic acid. 11. A powder coating according to claim 10 comprising a room temperature solid main constituent resin (A) with a curable reactive group, a room temperature solid curing agent (B) which reacts with said curable reactive group of said main constituent resin (A), a high boiling point organic solvent (C1) with a boiling point at atmospheric pressure of 150 to 300° C., and a pigment (D).12. A method of forming either one of a single layer and a multiple layer paint film on a target object for painting, wherein a powder coating (X1) produce by a production method according to claim 1 is used as a top coat paint.13. A method of forming a paint film according to claim 12, wherein a base coat paint [I] is applied to said target object for painting, and a top coat paint [II] is applied thereon, and said powder coating (X1) is used as said top coat paint [II].14. A method of forming a paint film according to claim 13, wherein said base coat paint [I] is a colored base coat paint, and said top coat paint [II] is a transparent top coat paint.15. A method of forming either one of a single layer and a multiple layer paint film on a target object for painting, wherein a powder coating (X2) according to claim 10 is used as a top coat paint.16. A method of forming a paint film according to claim 15, wherein a base coat paint [I] is applied to said target object for painting, and a top coat paint [II] is applied thereon, and said powder coating (X2) is used as said top coat paint [II].17. A method of forming a paint film according to claim 16, wherein said base coat paint [I] is a colored base coat paint, and said top coat paint [II] is a transparent top coat paint.
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이 특허에 인용된 특허 (4)
Okada, Katsuhiko; Agawa, Tetsuro, Method of manufacturing powder coating.
Wamprecht Christian (Neuss DEX) Halpaap Reinhard (Odenthal-Gloebusch DEX) Kreuder Hans-Joachim (Toenisvorst DEX) Bock Manfred (Leverkusen DEX) Meixner Jrgen (Krefeld DEX) Rettig Rainer (Amagasaki JPX, Powder coating compositions, a process for their production and their use for coating heat-resistant substrates.
Pettit ; Jr. Paul H. (Wilmington DE), Thermosetting powder coating composition of a blend of acrylic polymers having different glass transition temperatures a.
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