Patent EP0398551A2 successfully refreshed from Google Patents.
EP0398551A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method for preparing a polyamide composite material
Assignee: Toyota Motor Corp
•
Filing: 1990-05-02
•
Granted: —
•
Expires: 2010-05-02
Abstract
Abstract Disclosed is a polyamide composite material comprising (A) 100 parts by weight of a polyamide resin and (B) 0.05 to 30 parts by weight of a layered silicate uniformly dispersed in the component (A), wherein the reaction ratio of the components (A) and (B) is 60 % or less. Disclosed is also a method for preparing a polyamide composite material comprising making a composite in which a layered silicate, with a cation exchange capacity of 50 to 200 milliequivalents/100 g, is in the swelling condition in a dispersion medium; and mixing the composite with a polyamide resin.
Inventors
- 👤 Ryuichi C/O Ube Chemical Factory Deguchi
- 👤 Takeyoshi C/O Toyota Jidosha Kabushiki K. Nishio
- 👤 Akane Okada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 07:59
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; B; B82; B82Y; B82Y30/00; C08J; C08J5/00; C08J5/005; C08J2377/00
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
47 words
A polyamide composite material comprising (A) 100 parts by weight of a polyamide resin and (B) 0.05 to 30 parts by weight of a layered silicate uniformly dispersed in the component (A), wherein the reaction ratio of the components (A) and (B) is 60 % or less.
Claim 2
Dependent Claim
47 words
A polyamide composite material comprising (A) 100 parts by weight of a polyamide resin and (B) 0.05 to 30 parts by weight of a layered silicate uniformly dispersed in the component (A), wherein the reaction ratio of the components (A) and (B) is 60 % or less.
Claim 3
Dependent Claim
61 words
The polyamide composite material according to Claim 1, wherein the polyamide resin of the component (A) is at least one selected from the group consisting of polymers and copolymers obtained from ε-caprolactam, 6-aminocaproic acid, ω-enantholactam, 7-aminoheptanoic acid, 11-aminoundecanoic acid, 9-aminononanoic acid, α-pyrrolidone and α-piperidone; polymers and copolymers obtained by polycondensation of a diamine with a dicarboxylic acid; and blends of these.
Claim 4
Dependent Claim
50 words
The polyamide composite material according to Claim 2, wherein the diamine is at least one selected from the group consisting of hexamethylenediamine, nonamethylenediamine, undecamethylenediamine, dodecamethylenediamine and metaxylylenediamine; and the dicarboxylic acid is at least one selected from the group consisting of terephthalic acid, isophthalic acid, adipic acid and sebacic acid.
Claim 5
Dependent Claim
25 words
The polyamide composite material according to Claim 1, wherein the polyamide resin of the component (A) has an average molecular weight of 9,000 to 40,000.
Claim 6
Dependent Claim
29 words
The polyamide composite material according to Claim 1, wherein the polyamide resin of the component (A) contains other resin in an amount of less than 90 % by weight.
Claim 7
Dependent Claim
37 words
The polyamide composite material according to Claim 1, wherein said other resin to be used with the component (A) is at least one selected from the group consisting of polypropylene, ABS resin, polyphenyleneoxide, polycarbonate, polyethyleneterephthalate and polybutyleneterephthalate.
Claim 8
Dependent Claim
41 words
The polyamide composite material according to Claim 5, wherein the layered silicate of the component (B) has a shape having generally a thickness of 6 to 20 Å and a one side length within the range of 0.002 to 1 µm.
Claim 9
Dependent Claim
30 words
The polyamide composite material according to Claim 1, wherein the layered silicate of the component (B) is a layered phyllosilicate mineral constituted of layers of magnesium silicate or aluminum silicate.
Claim 10
Dependent Claim
35 words
The polyamide composite material according to Claim 1, wherein the layered silicate of the component (B) is at least one selected from the group consisting of montmorillonite, saponite, beidellite, nontronite, hectorite, stevensite, vermiculite and pyroysite.
Claim 11
Dependent Claim
32 words
The polyamide composite material according to Claim 1, wherein the formulation ratio of the component (B) is 0.1 to 10 parts by weight per 100 parts by weight of the components (A).
Claim 12
Dependent Claim
26 words
The polyamide composite material according to Claim 1, wherein the polyamide of the component (A) has the end group maintaining rate of more than 0 %.
Claim 13
Independent Claim
45 words
A method for preparing a polyamide composite material comprising making a composite in which a layered silicate, with a cation exchange capacity of 50 to 200 milliequivalents/100 g, is in the swelling condition in a dispersion medium; and mixing the composite with a polyamide resin.
Claim 14
Independent Claim
45 words
A method for preparing a polyamide composite material comprising making a composite in which a layered silicate, with a cation exchange capacity of 50 to 200 milliequivalents/100 g, is in the swelling condition in a dispersion medium; and mixing the composite with a polyamide resin.
Claim 15
Dependent Claim
27 words
The method according to Claim 12, wherein the combination of the layered silicate and dispersion medium is such that the swelling degree is 5 cc/g or more.
Claim 16
Dependent Claim
46 words
The method according to Claim 13, wherein the dispersion medium, by which the swelling degree of the layered silicate will become 5 cc/g or more, is used in an amount of 1 part by weight or more per 1 part by weight of the layered silicate.
Claim 17
Dependent Claim
28 words
The method according to Claim 12, wherein the layered silicate has an occupied area on the layer surface per one negative electric charge of 25 to 200 Ų.
Claim 18
Dependent Claim
27 words
The method according to Claim 12, wherein the layered silicate is subjected to substitution with use of at least one of an organic compound and hydrogen ion.
Claim 19
Dependent Claim
29 words
The method according to Claim 16, wherein the organic compound is at least one selected from the group consisting of ammonium salts, pyrridinium salts, sulfonium salts and phosphonium salts.
Claim 20
Dependent Claim
69 words
The method according to Claim 16, wherein the organic compound is at least one selected from the group consisting of those having ions of octadecylammonium ion CH₃(CH₂)₁₇N⁺H₃, monomethyloctadecylammonium ion CH₃(CH₂)₁₇N⁺H₂(CH₃), dimethyloctadecylammonium ion CH₃(CH₂)₁₇N⁺H(CH₃)₂, dodecylammonium ion CH₃(CH₂)₁₁N⁺H₃, 4-amino-n-butyric acid ion H₃⁺N(CH₂)₃COOH, 6-amino-n-caproic acid ion H₃⁺N(CH₂)₅COOH, 8-aminocaprylic acid ion H₃⁺N(CH₂)₇COOH, 10-aminodecanoic acid ion H₃⁺N(CH₂)₉COOH, 12-aminododecanoic acid ion H₃⁺N(CH₂)₁₁COOH, 14-aminotetradecanoic acid ion H₃⁺N(CH₂)₁₃COOH, 16-aminohexadecanoic acid ion H₃⁺N(CH₂)₁₅COOH and 18-aminooctadecanoic acid ion H₃⁺N(CH₂)₁₇COOH.
Claim 21
Dependent Claim
63 words
The method according to Claim 12, wherein the dispersion medium is at least one selected from the group consisting of water, methanol, ethanol, propanol, isopropanol, ethylene glycol, 1,4-butane diol, glycerine, dimethylsulfoxide, N,N-dimethylformamide, acetic acid, fumaric acid, pyridine, aniline, phenol, nitrobenzene, acetonitrile, acetone, methyl ethyl ketone, chloroform, carbon disulfide, propyrene carbonate, 2-methoxyethanol, ether, carbon tetrachloride, n-hexane, ε-caprolactam, ω-lauric lactam, aminocaproic acid and aminododecanoic acid.
Claim 22
Dependent Claim
31 words
The method according to Claim 12, wherein the amount of the dispersion medium employed is 100 to 5,000 parts by weight based on 100 parts by weight of the layered silicate.
Claim 23
Dependent Claim
24 words
The method according to Claim 12, wherein the composite and the polyamide resin are reacted in an reaction ratio of 60 % or less.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.