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EP0162651A1
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Aromatic oligomers
Assignee: Imperial Chemical Industries Ltd
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Filing: 1985-05-14
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Granted: —
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Expires: 2005-05-14
Abstract
Abstract Compositions comprising an oligomer which (a) on average comprises at least one in-chain residue of the general formulawherein Ar<sup>1</sup> is an aromatic group, R<sup>1</sup> is hydrogen or a hydrocarbyl group, X is a group which activates Ar<sup>1</sup> to electrophilic attack, and Y<sup>1</sup> is an organic residue bearing a carboxyl substituent; and (b) has one or more pendant and/or terminal acyloxymethyl groups are described. They may be used in dental, electronic and electrical applications.
Inventors
- 👤 Michael Edward Benet Jones
- 👤 John Gerard Carey
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 00:41
CPC Classifications
C; C08; C08G; C08G16/00; C08G16/02; C08G16/0212; A; A61; A61K; A61K6/00; A61K6/20; A61K6/30; A61K6/80; A61K6/884; A61K6/887; A61K6/891; Y; Y10; Y10S; Y10S522/00; Y10S522/908
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
78 words
A composition comprising an oligomer, which may be linear or branched, which (a) comprises on average at least one in-chain residue of the general formula and; (b) has one or more pendant and/or terminal acyloxymethyl groups; wherein Ar 1 is an aromatic group or a substituted aromatic group; R 1 is hydrogen or a hydrocarbyl group; X is a group which activates Ar l to electrophilic attack; and Y 1 is an organic residue bearing a carboxyl substituent.
Claim 2
Dependent Claim
78 words
A composition comprising an oligomer, which may be linear or branched, which (a) comprises on average at least one in-chain residue of the general formula and; (b) has one or more pendant and/or terminal acyloxymethyl groups; wherein Ar 1 is an aromatic group or a substituted aromatic group; R 1 is hydrogen or a hydrocarbyl group; X is a group which activates Ar l to electrophilic attack; and Y 1 is an organic residue bearing a carboxyl substituent.
Claim 3
Dependent Claim
66 words
A composition as claimed in claim 1 wherein the oligomer comprises one or more residues of the general formula wherein Ar 2 , which may be the same as or different from Ar 1 , is an aromatic group or a substituted aromatic group; and R 2 , which may be the same as or different from R l , is hydrogen or a hydrocarbyl group,
Claim 4
Dependent Claim
12 words
A composition as claimed in claim 1 wherein Ar 1 is mononuclear.
Claim 5
Dependent Claim
65 words
A composition as claimed in claim 2 wherein A r 2 has the structure -o- y2- o- wherein O is the phenylene group; and Y 2 is a direct link between two phenylene groups, or a divalent residue which includes one or more in-chain atoms, each of which atoms may be carbon or a hetero atom and may have one or more atoms appendant thereto.
Claim 6
Dependent Claim
12 words
A composition as claimed in claim 4 wherein Y 2 is oxygen.
Claim 7
Dependent Claim
24 words
A composition as claimed in claim 2 wherein the molar ratio of the residue - to the residue . is between 3:1 and 1:3
Claim 8
Dependent Claim
12 words
A composition as claimed in claim 1 wherein X is oxygen. -
Claim 9
Dependent Claim
10 words
A composition as claimed in claim 1 wherein Y 1
Claim 10
Dependent Claim
30 words
A composition as claimed in claim 1 wherein the acyloxy group in the one or more pendant and/or terminal acyloxymethyl groups is derived from a polymerisable olefinically unsaturated carboxylic acid.
Claim 11
Dependent Claim
20 words
A composition as claimed in claim 10 wherein the polymerisable olefinically unsaturated carboxylic acid is acrylic acid or methacrylic acid.
Claim 12
Dependent Claim
22 words
A composition as claimed in claim 1 comprising an addition polymerisable olefinically unsaturated monomer which is copolymerisable with the oligomer defined therein.
Claim 13
Dependent Claim
17 words
A composition as claimed in claim 12 wherein the said monomer is an acrylate or methacrylate ester.
Claim 14
Dependent Claim
12 words
Use of a composition as claimed in claim 1 in dental applications.
Claim 15
Dependent Claim
54 words
A process for the preparation of a photoresist which process comprises the steps of i) preparing a layer which comprises a composition as claimed in claim 1; ii) exposing the layer imagewise to suitable electromagnetic radiation; iii) treating the layer with a dilute solution of base to remove the unexposed regions of the layer.
Claim 16
Dependent Claim
103 words
A process for the preparation of an oligomer as defined in claim 1 which process comprises at least the step of reacting one or more suitable aromatic compounds at least one of which has the general formula A r- X - Y 1 , wherein Ar 1 , X and Y 1 have the meanings ascribed to them in claim 1, one or more aldehydes and one or more carboxylic acids in the presence of a strong acid, with the proviso that where the carboxylic acid is a polymerisable olefinically unsaturated carboxylic acid the reaction is carried out at a temperature below 90°C.
References Cited (Backward Citations)
EP0073303A1
Cited
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