Patent EP0211479A2 successfully refreshed from Google Patents.
EP0211479A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Glass fibre-reinforced polypropylene composition
Assignee: Mitsui Toatsu Chemicals Inc
•
Filing: 1986-06-02
•
Granted: —
•
Expires: 2006-06-02
Abstract
Abstract A glass fibre-reinforced polypropylene composition which comprises 100 parts by weight of a mixture consisting of 95 to 55 parts by weight of a graft polypropylene resin obtainable by graft-polymerising a radically-polymerisable unsaturated compound on to a crystalline polypropylene in a hydrocarbon solvent, in the presence of an organic peroxide catalyst, optionally together with a crystalline polypropylene, and 5 to 45 parts by weight of glass fibres treated with an organic silane compound or an organic titanium compound; 0.005 to 0.05 parts by weight of calcium stearate; and 0.01 to 0.07 part-by weight of a member selected from alkaline earth metal oxides, hydroxides, basic salts and basic complex salts.
Inventors
- 👤 Yoichi Kawai
- 👤 Masaru Abe
- 👤 Masami Maki
- 👤 Koutarou Suzuki
- 👤 Minoru Hoshino
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 07:20
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08L53/00; C08L53/02; C08L51/00; C08L51/06
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
112 words
1 . A glass fibre-reinforced polypropylene composition which comprises 100 parts by weight of a mixture consisting of 95 to 55 parts by weight of a graft polypropylene resin obtainable by graft-polymerising a radically-polymerisable unsaturated compound on to a crystalline polypropylene in a hydrocarbon solvent, in the presence of an organic peroxide catalyst, optionally together with a crystalline polypropylene, and 5 to 45 parts by weight of glass fibres treated with an organic silane compound or an organic titanium compound; 0.005 to 0.05 part by weight of calcium stearate; and 0.01 to 0.07 part by weight of a member selected from alkaline earth metal oxides, hydroxides, basic salts and basic complex salts.
Claim 2
Dependent Claim
112 words
1 . A glass fibre-reinforced polypropylene composition which comprises 100 parts by weight of a mixture consisting of 95 to 55 parts by weight of a graft polypropylene resin obtainable by graft-polymerising a radically-polymerisable unsaturated compound on to a crystalline polypropylene in a hydrocarbon solvent, in the presence of an organic peroxide catalyst, optionally together with a crystalline polypropylene, and 5 to 45 parts by weight of glass fibres treated with an organic silane compound or an organic titanium compound; 0.005 to 0.05 part by weight of calcium stearate; and 0.01 to 0.07 part by weight of a member selected from alkaline earth metal oxides, hydroxides, basic salts and basic complex salts.
Claim 3
Dependent Claim
28 words
A composition according to claim 1, which comprises 0.005 to 3.0 parts by weight of the radically-polymerisable unsaturated compound per 100 parts by weight of the glass fibres.
Claim 4
Dependent Claim
28 words
A composition according to claim 1, which comprises 0.05 to 2.0 parts by weight of the radically-polymerisable unsaturated compound per 100 parts by weight of the glass fibres.
Claim 5
Dependent Claim
37 words
A composition according to any preceding claim, wherein the graft polypropylene resin is obtainable by graft-polymerising 0.01 to 100 parts by weight of the radically-polymerisable unsaturated compound on to 100 parts by weight of the crystalline polypropylene.
Claim 6
Dependent Claim
23 words
A composition according to any preceding claim, wherein the crystalline polypropylene resin is propylene homopolymer and/or a copolymer of propylene and another α-olefin.
Claim 7
Dependent Claim
38 words
A composition according to any preceding claim, wherein the radically-polymerisable unsaturated compound is selected from a,B-unsaturated aliphatic monocarboxylic acids and derivatives thereof, a,B-unsaturated dicarboxylic acids and derivatives thereof, alkenylbenzenes and derivatives thereof, alkenylpyridines and derivatives thereof, and a-olefins.
Claim 8
Dependent Claim
17 words
A composition according to claim 6, wherein the radically-polymerisable unsaturated compound is maleic anhydride or acrylic acid.
Claim 9
Dependent Claim
30 words
A composition according to any preceding claim, wherein the organic silane compound is selected from vinyltrichlorosilane, vinyltri(B-methoxyethoxy)silane, vinyltriethoxysilane, Y-methacryloxypropyltrimethoxysilane, β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, Y-glycidoxypropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane, γ-aminopropyltriethoxysilane, N-phenyl- y- aminopropyltrimethoxysilane, y-methylcaptopropyltrimethoxysilane and γ-chloropropyltrimethoxysilane.
Claim 10
Dependent Claim
15 words
A composition according to claim 8, wherein the organic silane compound is γ-aminopropyltriethoxysilane or N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane.
Claim 11
Dependent Claim
14 words
A composition according to any preceding claim, wherein the organic titanium compound is tetraisopropylbis(dioctylphosphite)titanate.
Claim 12
Dependent Claim
28 words
A composition according to any preceding claim, wherein the glass fibres have a single fibre diameter of 1 to 15 µm and are 1 to 10 mm long.
Claim 13
Dependent Claim
33 words
A composition according to any preceding claim, wherein the mixture consists of 95 to 60 parts by weight of the graft polypropylene and 5 to 40 parts by weight of the glass fibres.
Claim 14
Dependent Claim
17 words
A composition according to any preceding claim, which comprises 0.01 to 0.5 part by weight calcium stearate.
Claim 15
Dependent Claim
28 words
A composition according to any preceding claim, wherein the said member is selected from magnesium oxide, magnesium hydroxide, calcium oxide, calcium hydroxide, hydrotalcite group and basic magnesium carbonate.
Claim 16
Dependent Claim
19 words
A process which comprises heating a composition according to any preceding claim, in the presence of an organic peroxide.
Claim 17
Dependent Claim
27 words
A process according to claim 15, which comprises using 0.001 to 0.5 part by weight of the organic peroxide per 100 parts by weight of the mixture.
Claim 18
Dependent Claim
19 words
A process according to claim 15 or claim 16, wherein the composition is heated at 170 to 280 C.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.