Patent US4946895A successfully refreshed from Google Patents.
US4946895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resinous composition for powder coating
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1989-09-29
•
Granted: 1990-08-07
•
Expires: 2009-09-29
Abstract
Abstract A resinous composition suitable for powder coating on metals on which a heat resistant coating layer is formed contains (A) modified polypropylene in which unsaturated carboxylic acid or anhydride is grafted on crystalline propylene/ alpha -olefin copolymer, (B) ethylene polymer, (C) metal oxide or hydroxide and (D) polymers of C6 or more vinyl cycloalkane and the composition contains 0.001-1.0% by weight of the vinyl cycloalkane unit.
Inventors
- 👤 Tadayuki Ohmae
- 👤 Kentaro Mashita
- 👤 Kizuku Wakatsuki
- 👤 Toshio Kawakita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:47
CPC Classifications
C; C09; C09D; C09D151/00; C09D151/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
184 words
A resinous composition for powder coating which comprises (A) 80-95 parts by weight of a modified polypropylene in which an unsaturated carboxylic acid or anhydride thereof is grafted onto at least a part of a crystalline random copolymer of (a) 90-99% by weight of propylene and (b) 10-1% by weight of a α-olefin having 2-10 carbon atoms excluding propylene, said modified polypropylene having a melt index of 10-60 g/10 min. and containing 0.01-5% by weight of said unsaturated carboxylic acid or anhydride thereof, (B) 20-5 parts by weight of at least one ethylene polymer selected from a low density polyethylene, a linear low density polyethylene and a copolymer of ethylene with 10% by weight or less of an ester of an unsaturated carboxylic acid or a vinyl ester of a fatty acid, (C) 0.1-10 parts by weight of an oxide or hydroxide of a metal of IIa, IIIa or IVb of the Mendelleev's Periodic Table, and (D) a vinyl cycloalkane polymer having at least six carbon atoms in such an amount that the units of vinyl cycloalkane are 0.001-1.0% by weight of the composition.
Claim 2
Dependent Claim
184 words
A resinous composition for powder coating which comprises (A) 80-95 parts by weight of a modified polypropylene in which an unsaturated carboxylic acid or anhydride thereof is grafted onto at least a part of a crystalline random copolymer of (a) 90-99% by weight of propylene and (b) 10-1% by weight of a α-olefin having 2-10 carbon atoms excluding propylene, said modified polypropylene having a melt index of 10-60 g/10 min. and containing 0.01-5% by weight of said unsaturated carboxylic acid or anhydride thereof, (B) 20-5 parts by weight of at least one ethylene polymer selected from a low density polyethylene, a linear low density polyethylene and a copolymer of ethylene with 10% by weight or less of an ester of an unsaturated carboxylic acid or a vinyl ester of a fatty acid, (C) 0.1-10 parts by weight of an oxide or hydroxide of a metal of IIa, IIIa or IVb of the Mendelleev's Periodic Table, and (D) a vinyl cycloalkane polymer having at least six carbon atoms in such an amount that the units of vinyl cycloalkane are 0.001-1.0% by weight of the composition.
Claim 3
Dependent Claim
15 words
A composition according to claim 1, wherein the crystalline random copolymer is a propylene/ethylene copolymer.
Claim 4
Dependent Claim
19 words
A composition according to claim 1, wherein the crystalline random copolymer has a melt index of 1-20 g/10 min.
Claim 5
Dependent Claim
29 words
A composition according to claim 1, wherein graft-copolymerization for production of the modified polypropylene (A) is conducted at a temperature of 100°-250° C. in the presence of a peroxide.
Claim 6
Dependent Claim
21 words
A composition according to claim 1, wherein the ethylene polymer (B) is a low density polyethylene or linear low density polyethylene.
Claim 7
Dependent Claim
21 words
A composition according to claim 1, wherein the metal oxide or hydroxide (C) is magnesium oxide, calcium hydroxide or magnesium hydroxide.
Claim 8
Dependent Claim
23 words
A composition according to claim 1, wherein said vinyl cycloalkane is vinyl cyclobutane, vinyl cyclopentane, vinyl-3-methylcyclopentane, vinyl cyclohexane, vinyl-2-methylcyclohexane, vinyl-3-methylcyclohexane or vinyl norbornane.
Claim 9
Dependent Claim
13 words
A composition according to claim 7, wherein said vinyl cycloalkane is vinyl cyclohexane.
References Cited (Backward Citations)
US4301062A
Cited
JPS5852338A
Cited
US4562230A
Cited
JPS5930841A
Cited
US4551501A
Cited
US4762882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |