EP0009971A2
Expired / Lapsed
EP
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Surface treating agent comprising modified propylene-ethylene copolymer, processes for preparing said surface treating agent, and use of said surface treating agent in the treatment of articles of an olefin resin
Assignee: Mitsui Chemicals Inc
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Filing: 1979-10-03
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Granted: —
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Expires: 1999-10-03
Abstract
Abstract A surface treating agent for fabricated articles of olefin polymers which is composed of an organic solvent solution of a modified polymer resulting from the graft copolymerization of a propylene-ethylene copolymer with maleic acid or maleic anhydride. The propylene-ethylene copolymer has a propylene content of 50 to 75 mole% and a crystallinity determined by an X-ray diffraction method of 2 to 20%. The amount of maleic acid or maleic anhydride grafted is 0.5 to 15% by weight. The modified polymer has an intrinsic viscosity of at least 0.3 dl / g, and is dissolved in the organic solvent in a concentration of 10 to 100 kg / m) of solvent. The treating agent can be prepared by dissolving the propylene-ethylene copolymer in the organic solvent before carrying out the grafting reaction or by carrying out the grafting reaction in a melt before adding the organic solvent. The treating agent is suitable for use as an undercoat for olefin polymer articles and improves the adhesion of a paint thereto.
Inventors
- 👤 Teiichi Shiomi
- 👤 Tadao Saito
- 👤 Riichiro Nagano
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 20:14
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/02; C; C08; C08F; C08F255/00; C08F255/02; C08F255/04; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C09; C09D; C09D151/00; C09D151/06; C08J2323/00; C08J2323/02; C08J2451/00; C08J2451/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
107 words
A surface treating agent composed of an organic solvent solution of a modified polymer resulting from graft copolymerization of a propylene-ethylene copolymer with maleic acid or maleic anhydride, said propylene-ethylene copolymer having a propylene content of 50 to 75 mole% and a crystallinity determined by an X-ray diffraction method of 2 to 20%, the amount of said maleic acid or maleic anhydride grafted being 0.5 to 15% by weight, and said modified polymer having an intrinsic viscosity of at least 0.3 dl/g (as determined in decalin solution at 135°C) and being dissolved in an amount of 10 to 100 kg per cubic meter of the organic solvent.
Claim 2
Dependent Claim
107 words
A surface treating agent composed of an organic solvent solution of a modified polymer resulting from graft copolymerization of a propylene-ethylene copolymer with maleic acid or maleic anhydride, said propylene-ethylene copolymer having a propylene content of 50 to 75 mole% and a crystallinity determined by an X-ray diffraction method of 2 to 20%, the amount of said maleic acid or maleic anhydride grafted being 0.5 to 15% by weight, and said modified polymer having an intrinsic viscosity of at least 0.3 dl/g (as determined in decalin solution at 135°C) and being dissolved in an amount of 10 to 100 kg per cubic meter of the organic solvent.
Claim 3
Dependent Claim
24 words
A surface treating agent according to claim 1 wherein said organic solvent is partly or wholly modified with the maleic acid or maleic anhydride.
Claim 4
Dependent Claim
21 words
A surface treating agent according to claim 1 or 2 wherein said propylene-ethylene copolymer has a crystallinity of 5 to 18%.
Claim 5
Dependent Claim
89 words
A process for preparing a surface treating agent, which process comprises dissolving a propylene- ethylene copolymer having a propylene content of 50 to 75 mole% and a crystallinity determined by an X-ray diffraction method of 2 to 20% in an organic solvent, graft copolymerizing it with maleic acid or maleic anhydride in the presence of a radical generator, and optionally diluting the resulting product with additional organic solvent, to provide an organic solvent solution containing 10 to 100 kg of the modified copolymer per cubic meter of the solvent.
Claim 6
Dependent Claim
89 words
A process for preparing a surface treating agent, which process comprises dissolving a propylene- ethylene copolymer having a propylene content of 50 to 75 mole% and a crystallinity determined by an X-ray diffraction method of 2 to 20% in an organic solvent, graft copolymerizing it with maleic acid or maleic anhydride in the presence of a radical generator, and optionally diluting the resulting product with additional organic solvent, to provide an organic solvent solution containing 10 to 100 kg of the modified copolymer per cubic meter of the solvent.
Claim 7
Dependent Claim
85 words
A process for preparing a surface treating agent, which process comprises graft copolymerizing a propylene-ethylene copolymer having a propylene content of 50 to 75 mole% and a crystallinity determined by an X-ray diffraction method of 2 to 20% with maleic acid or maleic anhydride in the molten state in the presence of a radical generator, and dissolving the resulting modified polymer in an organic solvent so that the concentration of the modified polymer is 10 to 100 kg per cubic meter of the organic solvent.
Claim 8
Dependent Claim
85 words
A process for preparing a surface treating agent, which process comprises graft copolymerizing a propylene-ethylene copolymer having a propylene content of 50 to 75 mole% and a crystallinity determined by an X-ray diffraction method of 2 to 20% with maleic acid or maleic anhydride in the molten state in the presence of a radical generator, and dissolving the resulting modified polymer in an organic solvent so that the concentration of the modified polymer is 10 to 100 kg per cubic meter of the organic solvent.
Claim 9
Dependent Claim
16 words
A process according to claim 4 or 5 wherein said organic solvent is an aromatic hydrocarbon.
Claim 10
Dependent Claim
14 words
A process according to claim 4 or 5 wherein said organic solvent is toluene.
Claim 11
Dependent Claim
32 words
A process according to any one of claims 4 to 7, wherein said propylene-ethylene copolymer has an intrinsic viscosity of from 0.3 to 20 dl/g (as determined in decalin solution at 135°C).
Claim 12
Dependent Claim
31 words
A process according to any one of claims 4 to 8 wherein the amount of maleic acid or maleic anhydride in the modified polymer is from 0.5 to 15% by weight.
Claim 13
Dependent Claim
39 words
Use of a surface treating agent as claimed in any one of claims 1 to 3 as an agent for treating the surface of an article of an olefin resin before the application of a paint to said surface.
References Cited (Backward Citations)
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