Unsaturated linear polyesters
First Claim
1. An unsaturated, flame-retardant, linear polyester consisting essentially in the total condensed acid component of at least 20 mol % of an unsaturated dicarboxylic acid selected from the group consisting of maleic, fumaric, itaconic, citraconic and dimethylmaleic acids and up to 80 mol % of a saturated aromatic or aliphatic dicarboxylic acid selected from the group consisting of phthalic, terephthalic, isophthalic, 2,5-dibromoterephthalic, succinic, glutaric, adipic, pimelic, suberic, azelaic and sebacic acids;
- and in the total condensed diol component of at least 18 mol % of a brominated or of at least 47 mol % of a chlorinated benzimidazolone diol of formula I ##EQU6## wherein X independently denotes bromine or chlorine, R1 and R1 '"'"' each denotes hydrogen, methyl, ethyl or phenyl, and R2 and R2 '"'"' each denotes hydrogen or R1 together with R2 and R1 '"'"' together with R2 '"'"' each denote trimethylene or tetramethylene;
the amount of diol of formula I incorporated in said polyester being that required to bring the bromine content of said polyester to at least 15 weight % or the chlorine content to at least 20 weight %; and
with the remaining condensed diol component selected from the group consisting of ethylene glycol, diethylene glycol, polyethylene glycol of up to 24 carbon atoms, propylene glycol, dipropylene glycol, polypropylene glycol of up to 24 carbon atoms, 1,4-butanediol, 1,12-dodecanediol, neopentyl glycol and 1,4-cyclohexanediol.
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Abstract
Unsaturated, linear polyesters having flame-retarding properties are obtained by polycondensing unsaturated dicarboxylic acids, optionally mixed with aromatic dicarboxylic acids and aliphatic diols, with brominated and/or chlorinated 1,3-di-(hydroxyalkyl)-benzimidazolone compounds. The new, unsaturated polyesters can be polymerized easily, also when mixed with other polymerizable monomers, and give moulding materials having flame-retarding properties.
6 Citations
4 Claims
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1. An unsaturated, flame-retardant, linear polyester consisting essentially in the total condensed acid component of at least 20 mol % of an unsaturated dicarboxylic acid selected from the group consisting of maleic, fumaric, itaconic, citraconic and dimethylmaleic acids and up to 80 mol % of a saturated aromatic or aliphatic dicarboxylic acid selected from the group consisting of phthalic, terephthalic, isophthalic, 2,5-dibromoterephthalic, succinic, glutaric, adipic, pimelic, suberic, azelaic and sebacic acids;
- and in the total condensed diol component of at least 18 mol % of a brominated or of at least 47 mol % of a chlorinated benzimidazolone diol of formula I ##EQU6## wherein X independently denotes bromine or chlorine, R1 and R1 '"'"' each denotes hydrogen, methyl, ethyl or phenyl, and R2 and R2 '"'"' each denotes hydrogen or R1 together with R2 and R1 '"'"' together with R2 '"'"' each denote trimethylene or tetramethylene;
the amount of diol of formula I incorporated in said polyester being that required to bring the bromine content of said polyester to at least 15 weight % or the chlorine content to at least 20 weight %; and
with the remaining condensed diol component selected from the group consisting of ethylene glycol, diethylene glycol, polyethylene glycol of up to 24 carbon atoms, propylene glycol, dipropylene glycol, polypropylene glycol of up to 24 carbon atoms, 1,4-butanediol, 1,12-dodecanediol, neopentyl glycol and 1,4-cyclohexanediol. - View Dependent Claims (2, 3, 4)
- and in the total condensed diol component of at least 18 mol % of a brominated or of at least 47 mol % of a chlorinated benzimidazolone diol of formula I ##EQU6## wherein X independently denotes bromine or chlorine, R1 and R1 '"'"' each denotes hydrogen, methyl, ethyl or phenyl, and R2 and R2 '"'"' each denotes hydrogen or R1 together with R2 and R1 '"'"' together with R2 '"'"' each denote trimethylene or tetramethylene;
Specification
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- Resources
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Current AssigneeCiba-Geigy Corporation (Novartis Ag)
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Original AssigneeCiba-Geigy Corporation (Novartis Ag)
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InventorsBatzer, Hans, Habermeier, Jurgen
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Primary Examiner(s)Morris, Theodore
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Assistant Examiner(s)Danison, Jr., W. C.
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Application NumberUS05/521,128Time in Patent Office770 DaysField of Search260/75 N, 260/75 H, 260/75 UA, 260/DIG. 24US Class Current528/289CPC Class CodesC08G 63/6858 Polycarboxylic acids and po...Y10S 260/24 Flameproof
