Preparation method for fluorine silicon phosphorus-containing anti-dropping flame-retardant polyethylene terephthalate

Abstract

The invention discloses a preparation method for fluorine silicon phosphorus-containing anti-dropping flame-retardant polyethylene terephthalate. The preparation method is characterized by comprising the following steps of: performing prepolymerization on a phosphorus-containing copolymerization flame retardant to synthesize phosphorus-containing copolymerization flame retardant prepolymer; performing dehydration reaction on trifluoalkyl siloxane and octaalkylcyclotetrasiloxane; adding dihydroxy siloxane and a catalyst, and reacting to synthesize dihydroxy fluorosiloxane; performing esterification on terephthalic acid and glycol; adding a catalyst B and a stabilizing agent; adding the phosphorus-containing copolymerization flame retardant prepolymer and the dihydroxy fluorosiloxane for polycondensation; and after the reaction is finished, cooling by using water and granulating to prepare the fluorine silicon phosphorus-containing anti-dropping flame-retardant polyethylene terephthalate. The product prepared by the method has high flame-retardant and anti-dropping properties and can serve as a raw material for producing films with the flame-retardant property of 94ULV-0 level or VTM-0 level, flame-retardant fibers and textiles with the flame-retardant level I and higher level, and V0-level flame-retardant plastic products.

Description

technical field [0001] The invention belongs to the preparation of polymer compounds, and relates to a preparation method of fluorine-containing silicon phosphorus anti-dripping flame-retardant polyethylene terephthalate. In the present invention, the anti-dripping element F (fluorine), flame-retardant elements Si (silicon) and P (phosphorus) are simultaneously introduced into the polyester (PET) macromolecular chain by a copolymerization method to obtain a polyester containing F, Si, and P. Ester polymer compound - fluorine-containing silicon phosphorus anti-dripping flame-retardant polyethylene terephthalate (PET). The anti-dripping and flame-retardant polyester resin prepared by the present invention can be used to produce films with flame-retardant performance up to UL 94V-0 level or VTM-0 level (collectively referred to as V0 level), flame-retardant fibers and textiles with flame-retardant B1 level and above, Raw material of V0 grade flame retardant plastic products. B...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art, especially the phosphorus-containing flame-retardant copolyester in the prior art cannot solve the problems of poor drip resistance and low flame-retardant grade at the same time, and provides a fluorine-containing silicon Preparation method of phosphorus anti-dripping flame-retardant polyethylene terephthalate

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