EP0108476A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Epoxy resin composition
Assignee: BP PLC
•
Filing: 1983-09-01
•
Granted: —
•
Expires: 2003-09-01
Abstract
Abstract A hardenable epoxy resin composition comprising a curable epoxy resin, a hardener for the epoxy resin and a polyetherimide having the general formula; where X is CyH 2 y, or , or -S- y is a positive integer from 1 to 5 m is 0 or 1 n is a positive integer from 20 to 150 and R' is an aromatic hydrocarbon radical having from 6 to 20 carbon atoms, or a cycloalkylene radical having from 2 to 20 carbon atoms or a divalent radical of the formula where and x is a positive integer from 1 to 5. Preferably X is C 3 H 6 and R' is preferably The compositions are particularly suitable for use in fibre composite materials.
Inventors
- 👤 Sidney George Fogg
- 👤 Douglas Wilson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 23:47
CPC Classifications
C; C08; C08L; C08L63/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
105 words
A hardenable epoxy resin composition comprising a curable epoxy resin, a hardener for the epoxy resin and a polyetherimide having the general formula; where X is CyH 2 y, or y is a positive integer from 1 to 5 m is 0 or 1 n is a positive integer from 20 to 150 and R I is an aromatic hydrocarbon radical having from 6 to 20 carbon atoms, or a cycloalkylene radical having from 2 to 20 carbon atoms or a divalent radical of the formula where Q is -0-, -S- or CxH 2 x and x is a positive integer from 1 to 5.
Claim 2
Dependent Claim
105 words
A hardenable epoxy resin composition comprising a curable epoxy resin, a hardener for the epoxy resin and a polyetherimide having the general formula; where X is CyH 2 y, or y is a positive integer from 1 to 5 m is 0 or 1 n is a positive integer from 20 to 150 and R I is an aromatic hydrocarbon radical having from 6 to 20 carbon atoms, or a cycloalkylene radical having from 2 to 20 carbon atoms or a divalent radical of the formula where Q is -0-, -S- or CxH 2 x and x is a positive integer from 1 to 5.
Claim 3
Dependent Claim
70 words
A hardenable epoxy resin composition as claimed in claim 1 in which the polyetherimide has the general formula where R 1 is an aromatic hydrocarbon radical having from 6 to 20 carbon atoms, or a cycloalkylene radical having from 2 to 20 carbon atoms or a divalent radical of the formula where Q is -0-, -S- or CxH 2 x and n is a positive integer from 20 to 150.
Claim 4
Dependent Claim
28 words
A hardenable epoxy resin composition as claimed in claim 1 in which the polyetherimide has the general formula; where n is a positive integer from 20 to 150.
Claim 5
Dependent Claim
30 words
A composition as claimed in either of claims 1 or 2 in which the epoxy resin is a polyglycidyl ether of 4,4' diaminodiphenylmethane or a polyglycidal ether of 2,2' bis(4-hydroxyphenyl)propane.
Claim 6
Dependent Claim
32 words
A composition as claimed in any of claims 1 to 4 in which the composition comprises 3 to 30 parts by weight of the polyetherimide per hundred parts of the epoxy resin.
Claim 7
Dependent Claim
28 words
A composition as claimed in any of claims 1 to 5 in which the hardener for the epoxy resin is selected from the group comprising diaminodiphenylsulphone and dicyandiamide.
Claim 8
Dependent Claim
35 words
A composition as claimed in any of claims 1 to 6 in which the amount of hardener in the composition comprises 3 to 40 parts by weight per one hundred parts of the epoxy resin.
Claim 9
Independent Claim
32 words
A method of producing a fibre reinforced article comprises impregnating a fibrous material with a hardenable epoxy resin composition as claimed in any of claims 1 to 7 and curing the composition.
Claim 10
Dependent Claim
14 words
A fibre reinforced article prepared according to the method as claimed in claim 8.
References Cited (Backward Citations)
FR2329721A1
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.