Halogen-free flame-retardant PET (polyethylene terephthalate) material and preparation method thereof

A flame retardant and catalyst technology, applied in the field of halogen-free flame retardant PET material and its preparation, can solve the problems of inability to achieve a higher flame retardant grade, unstable flame retardant effect, poor flame retardant effect, etc., and achieve excellent physical properties. Performance and mechanical properties, low production cost, outstanding effect of electrical insulation

Active Publication Date: 2019-02-22
BEIJING CO FOUND HIGH TECH INCUBATOR
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Brominated flame retardants are usually accompanied by the generation of toxic and corrosive gases during combustion, causing serious pollution to the environment
Red phosphorus and melamine salts are widely used in halogen-free flame retardant systems, but red phosphorus itself is colored and can only be used for black products, and its application range is narro

Method used

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  • Halogen-free flame-retardant PET (polyethylene terephthalate) material and preparation method thereof
  • Halogen-free flame-retardant PET (polyethylene terephthalate) material and preparation method thereof
  • Halogen-free flame-retardant PET (polyethylene terephthalate) material and preparation method thereof

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[0074] The present invention also provides a preparation method of the halogen-free flame-retardant PET material described in the above technical solution, comprising the following steps:

[0075] Mix PET, halogen-free phosphorus copolyester flame retardant, auxiliary flame retardant, glass fiber, compatibilizer, coupling agent and antioxidant II to obtain a mixture;

[0076] The compound is extruded, drawn, water-cooled, pelletized and dried in sequence to obtain the halogen-free flame-retardant PET material.

[0077] The invention mixes PET, non-halogen phosphorus copolyester flame retardant, auxiliary flame retardant, glass fiber, compatibilizer, coupling agent and antioxidant II to obtain a compound.

[0078] In the present invention, the glass fiber is preferably added from the glass fiber adding port; the mixing is preferably to mix all the pellets in the raw material uniformly first, then add the liquid material for high-speed mixing, and finally add the powder material...

Embodiment 1

[0087] Under the protection of nitrogen, add 6mol (1164g) dimethyl terephthalate into a 10L reaction kettle, add 18mol (1116g) ethylene glycol, heat up while stirring, adjust the system temperature to 170°C, Under the action of diantimony, the first transesterification reaction was carried out, and the amount of methanol removed reached a theoretical value of 384g, and the transesterification product system I was obtained;

[0088] Reduce the system temperature of transesterification product system I to 145°C, add 6mol (744g) dimethyl methylphosphonate (DMMP) and 0.38g antimony trioxide, stir evenly, and carry out the second transesterification reaction at 185°C until The amount of methanol produced exceeds 25% of the theoretical value to reach 480g, and the transesterification product system II is obtained;

[0089] Add 3.77g epoxy chain extender REPAIR CE-3, 2.83g triethyl phosphate and 0.75g tetrabutyl titanate to the transesterification product system II, press Slowly ev...

Embodiment 2

[0096] Under the protection of nitrogen, 6mol (1164g) of dimethyl terephthalate was added to a 10L reactor, followed by 19.8mol (2060g) of pentanediol, and the temperature was raised while stirring to adjust the temperature of the system to 160°C. Under the action of cobalt octoate, the first transesterification reaction was carried out, and the amount of methanol removed reached a theoretical value of 384g, and the transesterification product I system was obtained;

[0097] Lower the system temperature of transesterification product system I to 145°C, add 7.2mol (893g) dimethyl methylphosphonate (DMMP) and 0.78g cobalt octanoate, stir well, and carry out the second transesterification reaction at 170°C until the The amount of methanol exceeds 25% of the theoretical value to reach 576g, and the transesterification product system II is obtained;

[0098] Then add 2.59g epoxy chain extender REPAIR CE-3, 2.59g tris[2,4-di-tert-butylphenyl] phosphite and 0.51g tetrabutyl titanate ...

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Abstract

The invention provides a halogen-free flame-retardant PET (polyethylene terephthalate) material. The halogen-free flame-retardant PET material contains the following components in parts by weight: 40-60 parts of PET, 25-40 parts of halogen-free phosphorus-based copolyester flame retardant, 3-7 parts of auxiliary flame retardant, 5-20 parts of glass fiber, 1-3 parts of compatibilizer, 0.1-1 part ofcoupling agent and 0.5-2 parts of antioxidant II. A high-efficiency P-containing flame retardant is synthesized through polymerization reaction; and the presence of a P flame retardance element can improve the flame retardance of the polymer in a mode of changing the thermal degradation process of a polymer matrix and the like; the flame retardance stability of the polymer is further improved through the compounding of the P-containing flame retardant, and P and N flame retardance auxiliaries; and then the halogen-free flame-retardant PET material is prepared through the selection and dosagecontrol of reaction auxiliaries and the like. The halogen-free flame-retardant PET material prepared by the method has an excellent flame retardance effect, excellent mechanical property, high and lowtemperature resistance, chemical resistance and excellent resistance to gas, water, oil, peculiar smell and the like.

Description

technical field [0001] The invention relates to the technical field of flame-retardant engineering plastics, in particular to a halogen-free flame-retardant PET material and a preparation method thereof. Background technique [0002] As one of the first linear thermoplastic polymers to be industrialized, PET polyester resin is widely used in plastic packaging, electronics, In the fields of electrical appliances, automobiles, and instruments, parts made of materials such as heat-resistant and insulating materials usually have high requirements on the safety of materials, so it is particularly important to carry out research on the flame-retardant properties of PET materials. [0003] At present, there are many kinds of flame retardants used in PET materials, including: brominated flame retardants such as decabromodiphenyl ether, decabromodiphenylethane, etc.; phosphorus flame retardants such as red phosphorus; nitrogen flame retardants agents such as melamine, cyanurate (MCA...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L85/02C08L91/00C08K13/04C08K7/14C08K5/3492C08K5/544C08K5/5435C08K5/526C08K5/134C08G63/692C08G63/78
CPCC08G63/6926C08G63/78C08L67/02C08L2201/02C08L2201/08C08L2201/22C08L2205/025C08L2205/035C08K13/04C08K7/14C08K5/34928C08K5/544C08K5/526C08K5/1345C08L85/02C08L91/00C08K5/5435
Inventor 钱志国尹继磊刘天骄钱毅朱朗晖毕立盛佳竺朝山王利新宋佳
Owner BEIJING CO FOUND HIGH TECH INCUBATOR
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