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Priority to BG6676784ApriorityCriticalpatent/BG48872A1/en
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This compound is used in the manufacture of synthetic fibres. It exhibits enhanced and durable flame-resistance properties and has the following general formula:<IMAGE>where M is calcium and x is a number ranging between 135 and 140. The method involves carrying out re-esterification of dimethyl terephtalate with ethylene glycol in the presence of a calcium salt of a monoethyl ester of the phosphorous acid, followed by polycondensation in selected conditions.
BG6676784A1984-09-031984-09-03Phosphor- and metalcontaining polyethelene terephtalate and method for its preparation
BG48872A1
(en)