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US5585187A
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US
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Methods for surface treating and paint-coating resin composition molded articles and paint-coated article obtained by said method for paint-coating
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1995-05-12
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Granted: 1996-12-17
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Expires: 2015-05-12
Abstract
Abstract The present invention relates to; a method for surface treating a polypropylene resin composition molded article, which comprises irradiating a molded article with ultraviolet light having an irradiation wavelength of 300 nm or less, said molded article being obtained from a polypropylene resin composition which comprises: (A) 15-92% by weight of a crystalline propylene-ethylene block copolymer resin, (B) 5-40% by weight of an ethylene-propylene copolymer rubber, (C) 1-15% by weight of a hydroxyl group-containing propylene oligomer, and (D) 2-30% by weight of an inorganic filler; a method for paint-coating a polypropylene resin composition molded article, which comprises irradiating a molded article with ultraviolet light having an irradiation wavelength of 300 nm or less and coating the irradiated surface with a paint, said molded article being obtained from a polypropylene resin composition which comprises said components (A), (B), (C) and (D) above-mentioned; and a paint-coated article obtained by said method for paint-coating the polypropylene resin composition molded article. According to the present invention, the methods for surface treating and paint-coating the polypropylene resin composition molded article, which gives excellent paint-coatability and adhesion property of said molded article, and the paint-coated article, which is useful and suited especially for automotive exterior parts such as a bumper and an instrument panel, obtained by said method for paint-coating may be provided.
Inventors
- 👤 Hideo Shinonaga
- 👤 Satoru Sogabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:53
CPC Classifications
C; C08; C08L; C08L53/00; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/251; Y10T428/31504; Y10T428/31551; Y10T428/31562; Y10T428/31573; Y10T428/31587; Y10T428/31678; Y10T428/31692; Y10T428/31696; Y10T428/31855; Y10T428/31938
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
80 words
A method for surface treating a polypropylene resin composition molded article, which comprises irradiating a molded article with ultraviolet light having an irradiation wavelength of 300 nm or less, said molded article being obtained from a polypropylene resin composition which comprises: (A) 15-92% by weight of a crystalline propylene-ethylene block copolymer resin, (B) 5-40% by weight of an ethylene-propylene copolymer rubber, (C) 1-15% by weight of a hydroxyl group-containing propylene oligomer, and (D) 2-30% by weight of an inorganic filler.
Claim 2
Independent Claim
80 words
A method for surface treating a polypropylene resin composition molded article, which comprises irradiating a molded article with ultraviolet light having an irradiation wavelength of 300 nm or less, said molded article being obtained from a polypropylene resin composition which comprises: (A) 15-92% by weight of a crystalline propylene-ethylene block copolymer resin, (B) 5-40% by weight of an ethylene-propylene copolymer rubber, (C) 1-15% by weight of a hydroxyl group-containing propylene oligomer, and (D) 2-30% by weight of an inorganic filler.
Claim 3
Dependent Claim
112 words
A method for surface treating a polypropylene resin composition molded article according to claim 1, wherein the crystalline propylene-ethylene block copolymer resin (A) is a propylene-ethylene block copolymer resin containing 5 to 20% by weight of an ethylene-propylene random copolymer unit (A1) having ethylene/propylene ratio of 20/80 to 60/40 and 95 to 80% by weight of a crystalline homopropylene polymer unit (A2) having an intrinsic viscosity [η] P measured with tetralin solution at 135° C. of 0.8 to 2.0 dl/g, the Q value (weight average molecular weight/number average molecular weight) measured by GPC of 3.0 to 5.0 and the content of xylene-soluble portion at 20° C. of 1.5% by weight or less.
Claim 4
Dependent Claim
50 words
A method for surface treating a polypropylene resin composition molded article according to claim 1, wherein the ethylene-propylene copolymer rubber (B) is an ethylene-propylene random copolymer rubber which contains 20 to 75% by weight of propylene and which has a Mooney viscosity (ML 1+4 100° C.) of 10 to 100.
Claim 5
Dependent Claim
40 words
A method for surface treating a polypropylene resin composition molded article according to claim 1, wherein the hydroxyl group-containing propylene oligomer (C) has a number average molecular weight of 2000 to 20000 and a hydroxyl value of 10 to 80.
Claim 6
Dependent Claim
74 words
A method for surface treating a polypropylene resin composition molded article according to claim 1, wherein the inorganic filler (D) is a member selected from the group consisting of talc, mica, wollastonite, calcium carbonate, barium sulfate, magnesium carbonate, clay, alumina, silica, calcium sulfate, carbon fiber, glass fiber, metal fiber, silica sand, silica stone, carbon black, titanium oxide, magnesium hydroxide, zeolite, molybdenum, diatomaceous earth, sericite, Shirasu, calcium hydroxide, potassium sulfite, sodium sulfate, bentonite and graphite.
Claim 7
Dependent Claim
32 words
A method for surface treating a polypropylene resin composition molded article according to claim 1, wherein the inorganic filler (D) is talc having an average particle diameter of 3 μm or less.
Claim 8
Independent Claim
87 words
A method for paint-coating a polypropylene resin composition molded article, which comprises irradiating a molded article with ultraviolet light having an irradiation wavelength of 300 nm or less and coating the irradiated surface with a paint, said molded article being obtained from a polypropylene resin composition which comprises: (A) 15-92% by weight of a crystalline propylene-ethylene block copolymer resin, (B) 5-40% by weight of an ethylene-propylene copolymer rubber, (C) 1-15% by weight of a hydroxyl group-containing propylene oligomer, and (D) 2-30% by weight of an inorganic filler.
Claim 9
Independent Claim
87 words
A method for paint-coating a polypropylene resin composition molded article, which comprises irradiating a molded article with ultraviolet light having an irradiation wavelength of 300 nm or less and coating the irradiated surface with a paint, said molded article being obtained from a polypropylene resin composition which comprises: (A) 15-92% by weight of a crystalline propylene-ethylene block copolymer resin, (B) 5-40% by weight of an ethylene-propylene copolymer rubber, (C) 1-15% by weight of a hydroxyl group-containing propylene oligomer, and (D) 2-30% by weight of an inorganic filler.
Claim 10
Dependent Claim
111 words
A method for paint-coating a polypropylene resin composition molded article according to claim 7, wherein the crystalline propylene-ethylene block copolymer resin (A) is a propylene-ethylene block copolymer resin containing 5 to 20% by weight of an ethylene-propylene random copolymer unit (A1) having ethylene/propylene ratio of 20/80 to 60/40 and 95 to 80% by weight of a crystalline homopropylene polymer unit (A2) having an intrinsic viscosity [η] P measured with tetralin solution at 135° C. of 0.8 to 2.0 dl/g, the Q value (weight average molecular weight/number average molecular weight) measured by GPC of 3.0 to 5.0 and the content of xylene-soluble portion at 20° C. of 1.5% by weight or less.
Claim 11
Dependent Claim
49 words
A method for paint-coating a polypropylene resin composition molded article according to claim 7, wherein the ethylene-propylene copolymer rubber (B) is an ethylene-propylene random copolymer rubber which contains 20 to 75% by weight of propylene and which has a Mooney viscosity (ML 1+4 100° C.) of 10 to 100.
Claim 12
Dependent Claim
39 words
A method for paint-coating a polypropylene resin composition molded article according to claim 7, wherein the hydroxyl group-containing propylene oligomer (C) has a number average molecular weight of 2000 to 20000 and a hydroxyl value of 10 to 80.
Claim 13
Dependent Claim
73 words
A method for paint-coating a polypropylene resin composition molded article according to claim 7, wherein the inorganic filler (D) is a member selected from the group consisting of talc, mica, wollastonite, calcium carbonate, barium sulfate, magnesium carbonate, clay, alumina, silica, calcium sulfate, carbon fiber, glass fiber, metal fiber, silica sand, silica stone, carbon black, titanium oxide, magnesium hydroxide, zeolite, molybdenum, diatomaceous earth, sericite, Shirasu, calcium hydroxide, potassium sulfite, sodium sulfate, bentonite and graphite.
Claim 14
Dependent Claim
31 words
A method for paint-coating a polypropylene resin composition molded article according to claim 7, wherein the inorganic filler (D) is talc having an average particle diameter of 3 μm or less.
Claim 15
Dependent Claim
27 words
A method for paint-coating a polypropylene resin composition molded article according to claim 7, wherein the paint is a melamine coating material or an urethane coating material.
Claim 16
Dependent Claim
92 words
A paint-coated article obtained by a method for paint-coating a polypropylene resin composition molded article, which comprises irradiating a molded article with ultraviolet light having an irradiation wavelength of 300 nm or less and coating the irradiated surface with a paint, said molded article being obtained from a polypropylene resin composition which comprises: (A) 15-92% by weight of a crystalline propylene-ethylene block copolymer resin, (B) 5-40% by weight of an ethylene-propylene copolymer rubber, (C) 1-15% by weight of a hydroxyl group-containing propylene oligomer, and (D) 2-30% by weight of an inorganic filler.
Claim 17
Dependent Claim
92 words
A paint-coated article obtained by a method for paint-coating a polypropylene resin composition molded article, which comprises irradiating a molded article with ultraviolet light having an irradiation wavelength of 300 nm or less and coating the irradiated surface with a paint, said molded article being obtained from a polypropylene resin composition which comprises: (A) 15-92% by weight of a crystalline propylene-ethylene block copolymer resin, (B) 5-40% by weight of an ethylene-propylene copolymer rubber, (C) 1-15% by weight of a hydroxyl group-containing propylene oligomer, and (D) 2-30% by weight of an inorganic filler.
Claim 18
Dependent Claim
104 words
A paint-coated article according to claim 14, wherein the crystalline propylene-ethylene block copolymer resin (A) is a propylene-ethylene block copolymer resin containing 5 to 20% by weight of an ethylene-propylene random copolymer unit (A1) having ethylene/propylene ratio of 20/80 to 60/40 and 95 to 80% by weight of a crystalline homopropylene polymer unit (A2) having an intrinsic viscosity [η] P measured with tetralin solution at 135° C. of 0.8 to 2.0 dl/g, the Q value (weight average molecular weight/number average molecular weight) measured by GPC of 3.0 to 5.0 and the content of xylene-soluble portion at 20° C. of 1.5% by weight or less.
Claim 19
Dependent Claim
42 words
A paint-coated article according to claim 14, wherein the ethylene-propylene copolymer rubber (B) is an ethylene-propylene random copolymer rubber which contains 20 to 75% by weight of propylene and which has a Mooney viscosity (ML 1+4 100° C.) of 10 to 100.
Claim 20
Dependent Claim
32 words
A paint-coated article according to claim 14, wherein the hydroxyl group-containing propylene oligomer (C) has a number average molecular weight of 2000 to 20000 and a hydroxyl value of 10 to 80.
Claim 21
Dependent Claim
66 words
A paint-coated article according to claim 14, wherein the inorganic filler (D) is a member selected from the group consisting of talc, mica, wollastonite, calcium carbonate, barium sulfate, magnesium carbonate, clay, alumina, silica, calcium sulfate, carbon fiber, glass fiber, metal fiber, silica sand, silica stone, carbon black, titanium oxide, magnesium hydroxide, zeolite, molybdenum, diatomaceous earth, sericite, Shirasu, calcium hydroxide, potassium sulfite, sodium sulfate, bentonite and graphite.
Claim 22
Dependent Claim
24 words
A paint-coated article according to claim 14, wherein the inorganic filler (D) is talc having an average particle diameter of 3 μm or less.
Claim 23
Dependent Claim
20 words
A paint-coated article according to claim 14, wherein the paint is a melamine coating material or an urethane coating material.
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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) | 1999-12-17 | 2000-06-17 | 2000-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-17 | 2004-06-17 | 2004-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-17 | 2008-06-17 | 2008-12-17 | $7700.00 | Window Closed / Lapsed |