CN103709656A - Flame retardation modified PET/PBT alloy material and preparation method thereof - Google Patents

Abstract

The invention discloses a flame retardation modified PET/PBT alloy material and a preparation method thereof. The flame retardation modified PET/PBT alloy material comprises, by mass, 20-50% of PET, 20-50% of PBT, 10-30% of a flame retardant, 4-8% of a plasticizer, 3-5% of a lubricant and 0.1-1% of an antioxidant. The flame retardation modified PET/PBT alloy material prepared in the invention simultaneously possesses the respective advantages of the PET and the PBT, has the characteristics of high temperature resistance, chemical corrosion resistance, creep deformation resistance, friction resistance, good electrical insulation performance and the like, has a good flame retardation effect, has a limit oxygen index (LOI) reaching above 28, and can be widely applied to the textile field, the household electrical appliance field, the automobile field and the like.

Description

Flame-retardant modified PET/PBT alloy material and preparation method thereof

Technical field

The present invention relates to technical field of polymer materials, specifically a kind of flame-retardant modified PET/PBT alloy material and preparation method thereof.

Background technology

Polyethylene terephthalate (being called for short PET) is the thermoplastic polyester that 20 century 70s grow up with polybutylene terephthalate (being called for short PBT), there is high temperature resistant, moisture-proof, resistance to chemical attack, electrical insulation capability is good and the feature such as good elasticity, and can keep good mechanical property in wide temperature range, in national economy and new high-tech industry, having a wide range of applications, is a kind of indispensable type material.PET second-order transition temperature is higher, and crystallization velocity is slow, and shaping cycle is long; And PBT crystallization velocity is fast, second-order transition temperature is low, easily causes uneven in temperaturely, causes distortion.This make PET and PBT especially the application of PET on engineering plastics be subject to certain restrictions.The PET/PBT alloy material that the method for PET and PBT copolymerization, blend is made can be comprehensively performance separately, learn from other's strong points to offset one's weaknesses, make up the defect in one-component performance, obtain the comparatively desirable blend of over-all properties.Yet, PET/PBT alloy material easy firing, along with the widespread use of PET/PBT alloy, the potentially dangerous of its fire also becomes increasingly conspicuous, and conventionally, the flame retardant properties that interpolation fire retardant can improve PET/PBT alloy is an effective approach.

Summary of the invention

The object of the present invention is to provide a kind of high flame retardant, high performance flame-retardant modified PET/PBT alloy material and preparation method thereof.

The technical solution adopted for the present invention to solve the technical problems is: flame-retardant modified PET/PBT alloy material, its component by mass percent proportioning is: PET 20%～50%, PBT 20%～50%, fire retardant 10%～30%, softening agent 4%～8%, lubricant 3%～5%, oxidation inhibitor 0.1%～1%.

Described PET is polyethylene terephthalate.

Described PBT is polybutylene terephthalate.

Described fire retardant is decabromodiphynly oxide (DBDPO), to sulfobenzide phenyl phosphate ester class oligopolymer, annular phosphonate, tetrabromo-bisphenol double hydroxyethyl ether and sodium sulfonate-3, a kind of in 5 phenylformic acid dimethyl ester composite flame-retardant agents, polyphenylene phosphonic acids sulfobenzide ester, polyphenyl phosphoric acid bisphenol sulphone ester.

Described softening agent is polyoxyethylene glycol, and its molecular weight is between 600～2000.

Described lubricant is a kind of in trimethylolethane, calcium stearate, polyvinylpyrrolidone.

Described oxidation inhibitor is hindered phenol antioxygen 1010 or 1076 and the compound of phosphite ester kind antioxidant 168.

The preparation method of above-mentioned flame-retardant modified PET/PBT alloy material, comprises the following steps:

(1) PET is dried to 3～4 hours at 130 ℃～150 ℃, stand-by;

(2) PBT is dried to 3～5 hours at 130 ℃～140 ℃, stand-by;

(3) fire retardant is dried to 30～45 minutes at 80 ℃～85 ℃, stand-by;

(4) take by weight ratio PET, PBT and the fire retardant after drying treatment, after mixing, then add softening agent, lubricant and the oxidation inhibitor taking by weight ratio, then add together in high-speed mixer and fully mix 10～30 minutes;

(5) material again step (4) being mixed adds and in twin screw extruder, carries out melt blending, melt temperature is controlled at 270 ℃～290 ℃, after extruding by twin screw extruder, through overcooling, pelletizing, after dry, obtain flame-retardant modified PET/PBT alloy material of the present invention.

The invention has the beneficial effects as follows, the flame-retardant modified PET/PBT alloy material making by the present invention has had both the advantage of PET and PBT, there is the features such as high temperature resistant, resistance to chemical attack, resistance to creep, rub resistance, electrical insulation capability be good, simultaneously, its good flame retardation effect, limiting oxygen index(LOI) (LOI) reaches more than 28, can be widely used in the fields such as weaving, household electrical appliances, automobile.

Embodiment

Below in conjunction with specific embodiment, further illustrate technical scheme of the present invention.

Embodiment 1:

A kind of flame-retardant modified PET/PBT alloy material, its component by mass percent proportioning is: the compound 1% of PET 35%, PBT 35%, decabromodiphynly oxide (DBDPO) 20%, polyoxyethylene glycol 6%, trimethylolethane 3%, hindered phenol antioxygen 1010 and phosphite ester kind antioxidant 168, wherein, the molecular weight of polyoxyethylene glycol is between 600～2000.

Preparation method: (1) is dried 3～4 hours by PET at 130 ℃～150 ℃, stand-by; (2) PBT is dried to 3～5 hours at 130 ℃～140 ℃, stand-by; (3) decabromodiphynly oxide (DBDPO) is dried to 30～45 minutes at 80 ℃～85 ℃, stand-by; (4) take by weight ratio PET, PBT and the decabromodiphynly oxide (DBDPO) after drying treatment, after mixing, the compound that adds again the polyoxyethylene glycol, trimethylolethane and hindered phenol antioxygen 1010 and the phosphite ester kind antioxidant 168 that take by weight ratio, then adds together in high-speed mixer and fully mixes 10～30 minutes; (5) material again step (4) being mixed adds and in twin screw extruder, carries out melt blending, melt temperature is controlled at 270 ℃～290 ℃, after extruding by twin screw extruder, through overcooling, pelletizing, after dry, obtain flame-retardant modified PET/PBT alloy material of the present invention.

Embodiment 2:

A kind of flame-retardant modified PET/PBT alloy material, its component by mass percent proportioning is: the compound 0.5% of PET 40%, PBT 20%, polyphenylene phosphonic acids sulfobenzide ester 30%, polyoxyethylene glycol 6%, calcium stearate 3.5%, hindered phenol antioxygen 1076 and phosphite ester kind antioxidant 168, wherein, the molecular weight of polyoxyethylene glycol is between 600～2000.

Preparation method: (1) is dried 3～4 hours by PET at 130 ℃～150 ℃, stand-by; (2) PBT is dried to 3～5 hours at 130 ℃～140 ℃, stand-by; (3) polyphenylene phosphonic acids sulfobenzide ester is dried to 30～45 minutes at 80 ℃～85 ℃, stand-by; (4) take by weight ratio PET, PBT and the polyphenylene phosphonic acids sulfobenzide ester after drying treatment, after mixing, the compound that adds again the polyoxyethylene glycol, calcium stearate and hindered phenol antioxygen 1076 and the phosphite ester kind antioxidant 168 that take by weight ratio, then adds together in high-speed mixer and fully mixes 10～30 minutes; (5) material again step (4) being mixed adds and in twin screw extruder, carries out melt blending, melt temperature is controlled at 270 ℃～290 ℃, after extruding by twin screw extruder, through overcooling, pelletizing, after dry, obtain flame-retardant modified PET/PBT alloy material of the present invention.

Claims (6)

1. a flame-retardant modified PET/PBT alloy material, is characterized in that, its component by mass percent proportioning is: PET 20%～50%, PBT 20%～50%, fire retardant 10%～30%, softening agent 4%～8%, lubricant 3%～5%, oxidation inhibitor 0.1%～1%.

2. flame-retardant modified PET/PBT alloy material according to claim 1, it is characterized in that, described fire retardant is decabromodiphynly oxide (DBDPO), to sulfobenzide phenyl phosphate ester class oligopolymer, annular phosphonate, tetrabromo-bisphenol double hydroxyethyl ether and sodium sulfonate-3, a kind of in 5 phenylformic acid dimethyl ester composite flame-retardant agents, polyphenylene phosphonic acids sulfobenzide ester, polyphenyl phosphoric acid bisphenol sulphone ester.

3. flame-retardant modified PET/PBT alloy material according to claim 1, is characterized in that, described softening agent is polyoxyethylene glycol, and its molecular weight is between 600～2000.

4. flame-retardant modified PET/PBT alloy material according to claim 1, is characterized in that, described lubricant is a kind of in trimethylolethane, calcium stearate, polyvinylpyrrolidone.

5. flame-retardant modified PET/PBT alloy material according to claim 1, is characterized in that, described oxidation inhibitor is hindered phenol antioxygen 1010 or 1076 and the compound of phosphite ester kind antioxidant 168.

6. the preparation method of flame-retardant modified PET/PBT alloy material according to claim 1, is characterized in that, comprises the following steps:

(1) PET is dried to 3～4 hours at 130 ℃～150 ℃, stand-by;

(2) PBT is dried to 3～5 hours at 130 ℃～140 ℃, stand-by;

(3) fire retardant is dried to 30～45 minutes at 80 ℃～85 ℃, stand-by;

(4) take by weight ratio PET, PBT and the fire retardant after drying treatment, after mixing, then add softening agent, lubricant and the oxidation inhibitor taking by weight ratio, then add together in high-speed mixer and fully mix 10～30 minutes;

(5) material again step (4) being mixed adds and in twin screw extruder, carries out melt blending, melt temperature is controlled at 270 ℃～290 ℃, after extruding by twin screw extruder, through overcooling, pelletizing, after dry, obtain flame-retardant modified PET/PBT alloy material.