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GB968715A - Polymeric anhydrides - Google Patents

Polymeric anhydrides

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Publication number
GB968715A
GB968715AGB3665561AGB3665561AGB968715AGB 968715 AGB968715 AGB 968715AGB 3665561 AGB3665561 AGB 3665561AGB 3665561 AGB3665561 AGB 3665561AGB 968715 AGB968715 AGB 968715A
Authority
GB
United Kingdom
Prior art keywords
acid
heating
benzophenone
chloride
anhydride
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3665561A
Inventor
Isaac Goodman
James Eric Mcintyre
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Imperial Chemical Industries LtdfiledCriticalImperial Chemical Industries Ltd
Priority to GB3665561ApriorityCriticalpatent/GB968715A/en
Publication of GB968715ApublicationCriticalpatent/GB968715A/en
Expiredlegal-statusCriticalCurrent

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Abstract

The invention comprises polymeric anhydrides containing anhydride residues of benzophenone-4:41-dicarboxylic acid of formula: <FORM:0968715/C3/1> The polymer may also contain anhydride residues of another acid e.g. diphenyl methane-4:41-dicarboxylic acid, terephthalic acid, isophthalic acid or naphthalene dicarboxylic acid. The polymers may be obtained (a) by heating the dicarboxylic acid with a monocarboxylic acid anhydride or acid chloride or ketene, and heating the product under reduced pressure, (b) by reacting the diacid chloride of the acid with a salt of the acid, (c) by reacting the diacid chloride of the acid with water preferably in the presence of an acid acceptor, (d) by heating paraformaldehyde with either the diacid chloride of the dibasic acid or with the product obtained by reaction of the dibasic acid with a monocarboxylic acid anhydride, acid chloride or a ketene and then heating under reduced pressure, (e) by heating the diacid chloride of the acid with the anhydride of a monobasic acid, (f) by heating the diacid chloride of the acid with a diester of the acid and a catalyst e.g. zinc chloride, or (g) by heating the diacid chloride of the acid with the acid itself. In examples polymers are obtained by further heating in nitrogen the product obtained by heating benzophenone-4:41-dicarboxylic acid and acetic acid; by heating benzophenone-4:41-dicarboxylic acid and diphenyl methane-4:41-dicarboxylic acid with acetic anhydride; by heating benzophenone-4:41-dicarboxylic acid and isophthalic acid with acetic anhydride; by heating benzophenone-4:41-dicarboxylic acid and terephthalic acid with acetic anhydride; and by reacting benzophenone -4:41-dicarboxylic acid dissolved in dimethyl formamide containing pyridine with benzophenone-4:41-dicarbonyl chloride in dimethyl formamide. Specifications 840,846 and 840,847 are referred to.
GB3665561A1961-10-121961-10-12Polymeric anhydridesExpiredGB968715A (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
GB3665561AGB968715A (en)1961-10-121961-10-12Polymeric anhydrides

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
GB3665561AGB968715A (en)1961-10-121961-10-12Polymeric anhydrides

Publications (1)

Publication NumberPublication Date
GB968715Atrue GB968715A (en)1964-09-02

Family

ID=10390065

Family Applications (1)

Application NumberTitlePriority DateFiling Date
GB3665561AExpiredGB968715A (en)1961-10-121961-10-12Polymeric anhydrides

Country Status (1)

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GB (1)GB968715A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
US4757128A (en)*1986-08-011988-07-12Massachusetts Institute Of TechnologyHigh molecular weight polyanhydride and preparation thereof
US4789724A (en)*1986-10-171988-12-06Massachusetts Institute Of TechnologyPreparation of anhydride copolymers
US4886870A (en)*1984-05-211989-12-12Massachusetts Institute Of TechnologyBioerodible articles useful as implants and prostheses having predictable degradation rates
US4891225A (en)*1984-05-211990-01-02Massachusetts Institute Of TechnologyBioerodible polyanhydrides for controlled drug delivery
US4906474A (en)*1983-03-221990-03-06Massachusetts Institute Of TechnologyBioerodible polyanhydrides for controlled drug delivery
US4946929A (en)*1983-03-221990-08-07Massachusetts Institute Of TechnologyBioerodible articles useful as implants and prostheses having predictable degradation rates
US5019379A (en)*1987-07-311991-05-28Massachusetts Institute Of TechnologyUnsaturated polyanhydrides
US5545409A (en)*1989-02-221996-08-13Massachusetts Institute Of TechnologyDelivery system for controlled release of bioactive factors

Cited By (9)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
US4906474A (en)*1983-03-221990-03-06Massachusetts Institute Of TechnologyBioerodible polyanhydrides for controlled drug delivery
US4946929A (en)*1983-03-221990-08-07Massachusetts Institute Of TechnologyBioerodible articles useful as implants and prostheses having predictable degradation rates
US4886870A (en)*1984-05-211989-12-12Massachusetts Institute Of TechnologyBioerodible articles useful as implants and prostheses having predictable degradation rates
US4891225A (en)*1984-05-211990-01-02Massachusetts Institute Of TechnologyBioerodible polyanhydrides for controlled drug delivery
US4757128A (en)*1986-08-011988-07-12Massachusetts Institute Of TechnologyHigh molecular weight polyanhydride and preparation thereof
US4789724A (en)*1986-10-171988-12-06Massachusetts Institute Of TechnologyPreparation of anhydride copolymers
US5019379A (en)*1987-07-311991-05-28Massachusetts Institute Of TechnologyUnsaturated polyanhydrides
US5545409A (en)*1989-02-221996-08-13Massachusetts Institute Of TechnologyDelivery system for controlled release of bioactive factors
US5629009A (en)*1989-02-221997-05-13Massachusetts Institute Of TechnologyDelivery system for controlled release of bioactive factors

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