Patent US1927668A successfully refreshed from Google Patents.
Patent EP0006686A2 successfully refreshed from Google Patents.
EP0006686A2
Expired / Lapsed
EP
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The compound 3,6-bis(hydroxyethoxy)xanth-9-one, linear polyesters, and shaped articles obtained from the linear polyesters
Assignee: Imperial Chemical Industries Ltd
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Filing: 1979-05-21
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Granted: —
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Expires: 1999-05-21
Abstract
Abstract UV stable linear polyesters, e. g. PET, contain in their chain copolymerised bis(hydroxyalkoxy)xanth-9-ones, preferably 3,8-bis-(2-hydroxyethoxy)xanth-9-ones. The polymers are obtained by polymerisation in the presence of a tetrahydroxy benzophenone, preferably the 2,2',4,4'-isomer. The method of polymerising in the presence of dihydric phenols to obtain ethoxyaryloxy polyesters is also described.
Inventors
- 👤 Patrick James Horner
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 17:46
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/78; C07D311/80; C07D311/82; C07D311/84; C07D311/86; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/66
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
27 words
A linear polyester which contains in its molecule residues of bis(hydroxyalkoxy)xanth-9-ones, the amount of said bis(hydroxyalkoxy)xanth-9-ones being 0.05 to 10% by weight based on the total polymer.
Claim 2
Dependent Claim
27 words
A linear polyester which contains in its molecule residues of bis(hydroxyalkoxy)xanth-9-ones, the amount of said bis(hydroxyalkoxy)xanth-9-ones being 0.05 to 10% by weight based on the total polymer.
Claim 3
Dependent Claim
25 words
A linear polyester according to Claim 1, in which the amount of the bis(hydroxyalkoxy)xanth-9-one is 0.05 to 5% by weight based on the total polymer.
Claim 4
Dependent Claim
40 words
A linear polyester according to either Claim 1 or Claim 2, in which the polyester also contains in its molecule residues of 2,4-dihydroxybenzoic acid, the amount of said residues being 0.05 to 10% by weight based on the total polymer.
Claim 5
Dependent Claim
25 words
A linear polyester according to Claim 3, in which the mole ratio of the xanth-9-one residues to the dihydroxybenzoic acid residues is 1:1 to 1:07.
Claim 6
Dependent Claim
85 words
A linear polyester which has an IV above 0.50 and which contains in its molecule residues of:- (A) Dicarboxylic acids selected from (i) terephthalic acid, (ii) isothphthalic acid, (ii) naphthalene-2,6-dicarboxylic acid, and (iv) bis(carboxyphenoxy)ethane, (B) Glycols with 2 to 10 carbon atoms in the molecule, (C) Bis(hydroxyalkoxy)xanth-9-ones, (D) 2,4-dihydroxybenzoic acid, the amount of (C) being 0.05 to 10% and the amount of (D) being 0 to 10%, both percentages being by weight and based on the amount of (A) + (B) + (C) + (D).
Claim 7
Dependent Claim
85 words
A linear polyester which has an IV above 0.50 and which contains in its molecule residues of:- (A) Dicarboxylic acids selected from (i) terephthalic acid, (ii) isothphthalic acid, (ii) naphthalene-2,6-dicarboxylic acid, and (iv) bis(carboxyphenoxy)ethane, (B) Glycols with 2 to 10 carbon atoms in the molecule, (C) Bis(hydroxyalkoxy)xanth-9-ones, (D) 2,4-dihydroxybenzoic acid, the amount of (C) being 0.05 to 10% and the amount of (D) being 0 to 10%, both percentages being by weight and based on the amount of (A) + (B) + (C) + (D).
Claim 8
Dependent Claim
17 words
A linear polyester according to Claim 5, in which the percentage of (C) is 0.05 to 10%.
Claim 9
Dependent Claim
21 words
A linear polyester according to either Claim 5 or Claim 6 in which the percentage of (D) is 0.05 to 10%.
Claim 10
Dependent Claim
23 words
A linear polyester according to any one of Claims 5 to 7, in which the mole ratio of (C):(D) is 1:1 to 1:07.
Claim 11
Dependent Claim
74 words
A linear polyester which has as repeating units:- wherein at least 80 mole % of the X-groups represent p-phenylene and the remainder represent m-phenylene at least 90% of the Y groups represent -C n H 2n where n is an integer from 2 to 10 and at least 0.1% of the Y groups represent residues of 3,6- bis(hydroxyalkoxy)xanth-9-ones, said residues having the formula 1 where n' and n" are integers from 1 to 10.
Claim 12
Dependent Claim
74 words
A linear polyester which has as repeating units:- wherein at least 80 mole % of the X-groups represent p-phenylene and the remainder represent m-phenylene at least 90% of the Y groups represent -C n H 2n where n is an integer from 2 to 10 and at least 0.1% of the Y groups represent residues of 3,6- bis(hydroxyalkoxy)xanth-9-ones, said residues having the formula 1 where n' and n" are integers from 1 to 10.
Claim 13
Dependent Claim
11 words
A linear polyester according to Claim 9 wherein n = 2.
Claim 14
Dependent Claim
16 words
A linear polyester according to either Claim 9 or Claim 10 wherein n'= n" = 2.
Claim 15
Dependent Claim
30 words
A linear polyester according to any one of Claims 9 to 11, which also contains 0.05 to 10% by weight based on the total polyester of residues of 2,4-dihydroxybenzoic acid.
Claim 16
Independent Claim
69 words
A method of preparing a linear polyester which method comprises adding a dihydric phenol which is heat- stable at 250°C either to a precursor or to the ingredients from which said precursor is made and, after said addition, subjecting the precursor to polycondensation,said precursor being an ester of.ethylene glycol and one or more dicarboxylic acids selected from:- (i) terephthalic acid (ii) isophthalic acid (iii) naphthalene-2,6-dicarboxylic acid, and (iv) bis(carboxyphenoxy)ethane.
Claim 17
Independent Claim
69 words
A method of preparing a linear polyester which method comprises adding a dihydric phenol which is heat- stable at 250°C either to a precursor or to the ingredients from which said precursor is made and, after said addition, subjecting the precursor to polycondensation,said precursor being an ester of.ethylene glycol and one or more dicarboxylic acids selected from:- (i) terephthalic acid (ii) isophthalic acid (iii) naphthalene-2,6-dicarboxylic acid, and (iv) bis(carboxyphenoxy)ethane.
Claim 18
Dependent Claim
13 words
A method according to Claim 13, in which the dihydric phenol is 3,6-dihydroxyxanth-9-one.
Claim 19
Dependent Claim
27 words
A method according to either Claim 13 or Claim and ethylene glycol wherein the mole ratio of terephthalic acid to ethylene glycol is from 1:2 to 1:1.2.
Claim 20
Dependent Claim
1 words
3,6-bis(hydroxyethoxy)xanth-9-one.
Claim 21
Dependent Claim
1 words
3,6-bis(hydroxyethoxy)xanth-9-one.
References Cited (Backward Citations)
No citation records indexed.
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