CN104845204A - High-performance, environment-friendly and flame-retardant polyethylene terephthalate - Google Patents

Abstract

The present invention discloses a high-performance, environment-friendly and flame-retardant polyethylene terephthalate, which comprises the following components as weight %: 70-85% of PTT, 5-10% of glass fibers, 5-10% of halogen-free flame retardant, 2-6% of styrene-maleic anhydride random copolymers, 1-4% of polyethylene glycol, 0.1-0.5% of antioxidant, and 0.1-1% of lubricant. The halogen-free flame retardant is in the form of a compounded-type halogen-free flame retardant formed through uniformly mixing up 95 wt% of polydimethylsiloxane (PDMS), 1 wt% of potassium phenylsulphonyl benzene sulfonate (KSS) and 4 wt% of polytetrafluoroethylene (PTFE). According to the invention, the compounded-type halogen-free flame retardant is modified. Meanwhile, the reinforcement effect is realized by adding glass fibers and the toughening effect is realized by adding styrene-maleic anhydride random copolymers. In this way, the above product is excellent in flame-retardant performance and mechanical properties. The high-performance, environment-friendly and flame-retardant polyethylene terephthalate is good in processability, dimensional stability and chemical resistance, thus being suitable for further popularization and application.

Description

The fire-retardant Poly(Trimethylene Terephthalate) of high-performance environment-friendly

Technical field

The present invention relates to technical field of polymer materials, specifically the fire-retardant Poly(Trimethylene Terephthalate) of a kind of high-performance environment-friendly.

Background technology

Poly(Trimethylene Terephthalate) (PTT) is as a kind of new polyester macromolecular material of excellent combination property, the fields such as fiber, film, engineering plastics are widely used at present, especially in engineering plastics, PTT has the high-performance of polyethylene terephthalate (PET) and the workability of polybutylene terephthalate (PBT) simultaneously, and its price is much lower compared with PBT, thus there is good practical value.But PTT is the same with other engineering plastics, there is poor fire, notched Izod impact strength is low, notch sensitivity is large defect, this will strongly limit the range of application of PTT.

Summary of the invention

The object of the present invention is to provide the fire-retardant Poly(Trimethylene Terephthalate) of a kind of high-performance environment-friendly.

The technical solution adopted for the present invention to solve the technical problems is: the fire-retardant Poly(Trimethylene Terephthalate) of high-performance environment-friendly, and its component by mass percent proportioning is: PTT 70% ~ 85%, glass fibre 5% ~ 10%, halogen-free flame retardants 5% ~ 10%, atactic styrene-maleic anhydride copolymer 2% ~ 6%, polyoxyethylene glycol 1% ~ 4%, oxidation inhibitor 0.1% ~ 0.5%, lubricant 0.1% ~ 1%.

Described PTT is the Poly(Trimethylene Terephthalate) of limiting viscosity 0.7 ~ 1.2dL/g.

Described glass fibre is the alkali-free short glass fiber of surface through silane coupling agent process.

Described halogen-free flame retardants mixes obtained Compositional type halogen-free flame retardants by polydimethylsiloxane 95wt%, potassium phenylsulphonyl benzene sulfonate KSS 1wt% and polytetrafluoroethylene PTFE 4wt% three.

Described oxidation inhibitor is the Hinered phenols antioxidant 1076 of mass ratio 1:2 and the compound of phosphite ester kind antioxidant 168.

Described lubricant is pentaerythritol stearate.

The preparation method of the fire-retardant Poly(Trimethylene Terephthalate) of above-mentioned high-performance environment-friendly, comprises the following steps:

(1), by PTT be placed in forced air circulation baking oven, at 110 DEG C ~ 120 DEG C temperature, drying about 6 ~ 8 hours, stand-by;

(2) polydimethylsiloxane 95wt%, potassium phenylsulphonyl benzene sulfonate KSS 1wt% and polytetrafluoroethylene PTFE 4wt%, is taken by weight ratio, make to mix, obtained Compositional type halogen-free flame retardants, then at 80 DEG C ~ 85 DEG C dry 30 ~ 45 minutes, stand-by;

(3), add in high-speed mixer by taking dry PTT by weight ratio, add simultaneously and take the obtained Compositional type halogen-free flame retardants of step (2) by weight ratio, stir 1 ~ 3 minute, then the glass fibre, atactic styrene-maleic anhydride copolymer, polyoxyethylene glycol, oxidation inhibitor and the lubricant that take by weight ratio is added, make to stir 3 ~ 15 minutes together, evenly rear discharging to be mixed;

(4), the compound of step (3) is added in twin screw extruder, extrudes through melting mixing at 180 DEG C ~ 260 DEG C temperature, cooling granulation, drying, obtain the fire-retardant Poly(Trimethylene Terephthalate) of high-performance environment-friendly of the present invention.

The time of delivery of step (4) described compound in twin screw extruder is 1 ~ 2 minute.

The invention has the beneficial effects as follows, the present invention carries out modification by preparing Compositional type halogen-free flame retardants, add glass fiber reinforcement and atactic styrene-maleic anhydride copolymer is toughness reinforcing simultaneously, making products therefrom have good flame-retardance can with excellent mechanical property, and good processability, dimensional stabilizing and chemical resistant properties are by force, easy to utilize.

Embodiment

Technical scheme of the present invention is further illustrated below in conjunction with concrete preferred embodiment.

Embodiment 1:

The fire-retardant Poly(Trimethylene Terephthalate) of a kind of high-performance environment-friendly, its component by mass percent proportioning is: PTT 71%, glass fibre 10%, halogen-free flame retardants 10%, atactic styrene-maleic anhydride copolymer 4%, polyoxyethylene glycol 4%, oxidation inhibitor 0.2%, pentaerythritol stearate 0.8%, wherein, described PTT is the Poly(Trimethylene Terephthalate) of limiting viscosity 0.7 ~ 1.2dL/g, described glass fibre is the alkali-free short glass fiber of surface through silane coupling agent process, described halogen-free flame retardants is by polydimethylsiloxane 95wt%, potassium phenylsulphonyl benzene sulfonate KSS 1wt% and polytetrafluoroethylene PTFE 4wt% three mix obtained Compositional type halogen-free flame retardants, described oxidation inhibitor is the Hinered phenols antioxidant 1076 of mass ratio 1:2 and the compound of phosphite ester kind antioxidant 168.

Preparation method: (1), PTT is placed in forced air circulation baking oven, at 110 DEG C ~ 120 DEG C temperature, drying about 6 ~ 8 hours, stand-by; (2) polydimethylsiloxane 95wt%, potassium phenylsulphonyl benzene sulfonate KSS 1wt% and polytetrafluoroethylene PTFE 4wt%, is taken by weight ratio, make to mix, obtained Compositional type halogen-free flame retardants, then at 80 DEG C ~ 85 DEG C dry 30 ~ 45 minutes, stand-by; (3), add in high-speed mixer by taking dry PTT by weight ratio, add simultaneously and take the obtained Compositional type halogen-free flame retardants of step (2) by weight ratio, stir 1 ~ 3 minute, then the glass fibre, atactic styrene-maleic anhydride copolymer, polyoxyethylene glycol, oxidation inhibitor and the lubricant that take by weight ratio is added, make to stir 3 ~ 15 minutes together, evenly rear discharging to be mixed; (4), the compound of step (3) is added in twin screw extruder, at 180 DEG C ~ 260 DEG C temperature through 1 ~ 2 minute melting mixing and extrude, cooling granulation, drying, obtain the fire-retardant Poly(Trimethylene Terephthalate) of high-performance environment-friendly of the present invention.

Embodiment 2:

The fire-retardant Poly(Trimethylene Terephthalate) of a kind of high-performance environment-friendly, its component by mass percent proportioning is: PTT 80%, glass fibre 8%, halogen-free flame retardants 5%, atactic styrene-maleic anhydride copolymer 4%, polyoxyethylene glycol 2.5%, oxidation inhibitor 0.1%, pentaerythritol stearate 0.4%, wherein, described PTT is the Poly(Trimethylene Terephthalate) of limiting viscosity 0.7 ~ 1.2dL/g, described glass fibre is the alkali-free short glass fiber of surface through silane coupling agent process, described halogen-free flame retardants is by polydimethylsiloxane 95wt%, potassium phenylsulphonyl benzene sulfonate KSS 1wt% and polytetrafluoroethylene PTFE 4wt% three mix obtained Compositional type halogen-free flame retardants, described oxidation inhibitor is the Hinered phenols antioxidant 1076 of mass ratio 1:2 and the compound of phosphite ester kind antioxidant 168.

Preparation method is with embodiment 1.

Claims (6)

1. the fire-retardant Poly(Trimethylene Terephthalate) of high-performance environment-friendly, it is characterized in that, its component by mass percent proportioning is: PTT 70% ~ 85%, glass fibre 5% ~ 10%, halogen-free flame retardants 5% ~ 10%, atactic styrene-maleic anhydride copolymer 2% ~ 6%, polyoxyethylene glycol 1% ~ 4%, oxidation inhibitor 0.1% ~ 0.5%, lubricant 0.1% ~ 1%.

2. the fire-retardant Poly(Trimethylene Terephthalate) of high-performance environment-friendly according to claim 1, is characterized in that, described glass fibre is the alkali-free short glass fiber of surface through silane coupling agent process.

3. the fire-retardant Poly(Trimethylene Terephthalate) of high-performance environment-friendly according to claim 1; it is characterized in that, described halogen-free flame retardants mixes obtained Compositional type halogen-free flame retardants by polydimethylsiloxane 95wt%, potassium phenylsulphonyl benzene sulfonate KSS 1wt% and polytetrafluoroethylene PTFE 4wt% three.

4. the fire-retardant Poly(Trimethylene Terephthalate) of high-performance environment-friendly according to claim 1, is characterized in that, described oxidation inhibitor is the Hinered phenols antioxidant 1076 of mass ratio 1:2 and the compound of phosphite ester kind antioxidant 168.

5. the fire-retardant Poly(Trimethylene Terephthalate) of high-performance environment-friendly according to claim 1, is characterized in that, described lubricant is pentaerythritol stearate.

6. the preparation method of the fire-retardant Poly(Trimethylene Terephthalate) of high-performance environment-friendly according to claim 1, is characterized in that, comprise the following steps:

(1), by PTT be placed in forced air circulation baking oven, at 110 DEG C ~ 120 DEG C temperature, drying about 6 ~ 8 hours, stand-by;

(2) polydimethylsiloxane 95wt%, potassium phenylsulphonyl benzene sulfonate KSS 1wt% and polytetrafluoroethylene PTFE 4wt%, is taken by weight ratio, make to mix, obtained Compositional type halogen-free flame retardants, then at 80 DEG C ~ 85 DEG C dry 30 ~ 45 minutes, stand-by;

(3), add in high-speed mixer by taking dry PTT by weight ratio, add simultaneously and take the obtained Compositional type halogen-free flame retardants of step (2) by weight ratio, stir 1 ~ 3 minute, then the glass fibre, atactic styrene-maleic anhydride copolymer, polyoxyethylene glycol, oxidation inhibitor and the lubricant that take by weight ratio is added, make to stir 3 ~ 15 minutes together, evenly rear discharging to be mixed;

(4), the compound of step (3) is added in twin screw extruder, extrudes through melting mixing at 180 DEG C ~ 260 DEG C temperature, cooling granulation, drying, obtain the fire-retardant Poly(Trimethylene Terephthalate) of high-performance environment-friendly of the present invention.