CN104861506A - Flame retardation composition based on PTT polyesters and preparation method therefor - Google Patents

Abstract

The invention discloses a flame retardation composition based on PTT polyesters and a preparation method therefor. The flame retardation composition comprises the following ingredients, by weight, 75%-85% of PTT, 5%-10% of composite flame retardant, 5%-10% of glass fibers, 2%-4% of polyethylene glycol, 0.1%-0.5% of anti-oxidants and 0.1%-1% of lubricants. The composite flame retardant is a composite flame retardant composed of 10-20wt% of trimethylsilyl dimethyl methylphosphonate 30-50wt% of melamine cyanurate, 10-20wt% of antimonous oxide and 20-40wt% of dimethyl methylphosphonate. The beneficial effects are that the flame retardation composition has good flame retardation performance and mechanical properties, and has characteristics of excellent chemical resistance, tensile strength and dimension stability, high glossiness and the like; the preparation technology is simple, the cost is low, and popularization and application are convenient.

Description

A kind of fire-retardant combination based on PTT polyester and preparation method thereof

Technical field

The present invention relates to technical field of polymer materials, specifically a kind of fire-retardant combination based on PTT polyester and preparation method thereof.

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, Poly(Trimethylene Terephthalate) 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 plastics, there is the deficiency of poor fire, the Application Areas of high flame retardant requirement can not be suitable for.

Summary of the invention

The object of the present invention is to provide fire-retardant combination based on PTT polyester that a kind of flame retardant properties is good, mechanical property is strong and cost is low and preparation method thereof.

The technical solution adopted for the present invention to solve the technical problems is: a kind of fire-retardant combination based on PTT polyester, and its component by mass percent proportioning is: PTT 75% ~ 85%, composite fire retardant 5% ~ 10%, glass fibre 5% ~ 10%, polyoxyethylene glycol 2% ~ 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.

The composite fire retardant that described composite fire retardant is made up of trimethylsilyl dimethyl methyl phosphonate 10 ~ 20wt%, melamine cyanurate 30 ~ 50wt%, antimonous oxide 10 ~ 20wt% and dimethyl methyl phosphonate 20 ~ 40wt%.

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

Described oxidation inhibitor is the hindered phenol antioxygen 1076 of mass ratio 1:2 and the compound of phosphite antioxidant 168.

Described lubricant is pentaerythritol stearate.

The preparation method of above-mentioned a kind of fire-retardant combination based on PTT polyester, 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) trimethylsilyl dimethyl methyl phosphonate 10 ~ 20wt%, melamine cyanurate 30 ~ 50wt%, antimonous oxide 10 ~ 20wt% and dimethyl methyl phosphonate 20 ~ 40wt%, is taken by weight ratio, make to mix, obtained composite fire retardant, 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 composite fire retardant of step (2) by weight ratio, stir 1 ~ 3 minute, then the glass fibre, 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 a kind of fire-retardant combination based on PTT polyester of the present invention.

The invention has the beneficial effects as follows, the present invention has good flame retardant properties and mechanical property, also have the features such as excellent chemical resistant properties, tensile strength, dimensional stability and high-luster, and preparation technology is simple, cost is low simultaneously, easy to utilize.

Embodiment

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

Embodiment 1:

A kind of fire-retardant combination based on PTT polyester, its component by mass percent proportioning is: PTT 75%, composite fire retardant 10%, glass fibre 10%, 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 composite fire retardant is by trimethylsilyl dimethyl methyl phosphonate 20wt%, melamine cyanurate 40wt%, the composite fire retardant that antimonous oxide 10wt% and dimethyl methyl phosphonate 30wt% forms, described glass fibre is the alkali-free short glass fiber of surface after silane coupling agent process, described oxidation inhibitor is the hindered phenol antioxygen 1076 of mass ratio 1:2 and the compound of phosphite 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) trimethylsilyl dimethyl methyl phosphonate 20wt%, melamine cyanurate 40wt%, antimonous oxide 10wt% and dimethyl methyl phosphonate 30wt%, is taken by weight ratio, make to mix, obtained composite fire retardant, 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 composite fire retardant of step (2) by weight ratio, stir 1 ~ 3 minute, then the glass fibre, polyoxyethylene glycol, oxidation inhibitor and the pentaerythritol stearate 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 a kind of fire-retardant combination based on PTT polyester of the present invention.

Embodiment 2:

A kind of fire-retardant combination based on PTT polyester, its component by mass percent proportioning is: PTT 84%, composite fire retardant 8%, glass fibre 5%, 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 composite fire retardant is by trimethylsilyl dimethyl methyl phosphonate 15wt%, melamine cyanurate 30wt%, the composite fire retardant that antimonous oxide 15wt% and dimethyl methyl phosphonate 40wt% forms, described glass fibre is the alkali-free short glass fiber of surface after silane coupling agent process, described oxidation inhibitor is the hindered phenol antioxygen 1076 of mass ratio 1:2 and the compound of phosphite 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) trimethylsilyl dimethyl methyl phosphonate 15wt%, melamine cyanurate 30wt%, antimonous oxide 15wt% and dimethyl methyl phosphonate 40wt%, is taken by weight ratio, make to mix, obtained composite fire retardant, 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 composite fire retardant of step (2) by weight ratio, stir 1 ~ 3 minute, then the glass fibre, polyoxyethylene glycol, oxidation inhibitor and the pentaerythritol stearate 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 a kind of fire-retardant combination based on PTT polyester of the present invention.

Claims (6)

1. the fire-retardant combination based on PTT polyester, it is characterized in that, its component by mass percent proportioning is: PTT 75% ~ 85%, composite fire retardant 5% ~ 10%, glass fibre 5% ~ 10%, polyoxyethylene glycol 2% ~ 4%, oxidation inhibitor 0.1% ~ 0.5%, lubricant 0.1% ~ 1%.

2. a kind of fire-retardant combination based on PTT polyester according to claim 1, it is characterized in that, the composite fire retardant that described composite fire retardant is made up of trimethylsilyl dimethyl methyl phosphonate 10 ~ 20wt%, melamine cyanurate 30 ~ 50wt%, antimonous oxide 10 ~ 20wt% and dimethyl methyl phosphonate 20 ~ 40wt%.

3. a kind of fire-retardant combination based on PTT polyester according to claim 1, is characterized in that, described glass fibre is the alkali-free short glass fiber of surface after silane coupling agent process.

4. a kind of fire-retardant combination based on PTT polyester according to claim 1, is characterized in that, described oxidation inhibitor is the hindered phenol antioxygen 1076 of mass ratio 1:2 and the compound of phosphite antioxidant 168.

5. a kind of fire-retardant combination based on PTT polyester according to claim 1, is characterized in that, described lubricant is pentaerythritol stearate.

6. the preparation method of a kind of fire-retardant combination based on PTT polyester 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) trimethylsilyl dimethyl methyl phosphonate 10 ~ 20wt%, melamine cyanurate 30 ~ 50wt%, antimonous oxide 10 ~ 20wt% and dimethyl methyl phosphonate 20 ~ 40wt%, is taken by weight ratio, make to mix, obtained composite fire retardant, 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 composite fire retardant of step (2) by weight ratio, stir 1 ~ 3 minute, then the glass fibre, 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 a kind of fire-retardant combination based on PTT polyester of the present invention.