A kind of halogen-free flame-retardant pet 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 environmental pollution, inability to achieve a higher flame retardant grade, and narrow application range.

Active Publication Date: 2021-09-14
BEIJING CO FOUND HIGH TECH INCUBATOR
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  • Summary
  • 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 narrow; nitrogen-based flame retardants are mainly melamine uric acid salts and phosphates , but its flame retardant effect is not good, and the flame retardant effect formed is extremely unstable. Generally, the addition amount is large and cannot reach a high flame retardant level, and it can only be used in occasions where flame retardant requirements are not high.

Method used

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  • A kind of halogen-free flame-retardant pet material and preparation method thereof
  • A kind of halogen-free flame-retardant pet material and preparation method thereof
  • A kind of halogen-free flame-retardant pet material and preparation method thereof

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preparation example Construction

[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 material, which comprises the following components in parts by weight: 40-60 parts of PET, 25-40 parts of halogen-free phosphorus copolyester flame retardant, and 3-7 parts of auxiliary flame retardant , 5-20 parts of glass fiber, 1-3 parts of compatibilizer, 0.1-1 part of coupling agent, 0.5-2 parts of antioxidant II. The present invention synthesizes a high-efficiency P-containing flame retardant through a polymerization reaction. The existence of P flame-retardant elements can improve the flame retardancy of polymers by changing the thermal degradation process of the polymer matrix, and by combining with P and N The compounding of combustion aids further improves the flame-retardant stability of the polymer, and then through the selection and dosage control of reaction aids, a halogen-free flame-retardant PET material is prepared. The flame retardant PET material prepared by the invention has excellent flame retardant effect, excellent mechanical properties, high and low temperature resistance, chemical resistance and excellent gas, water, oil, odor and other performances.

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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Patent Type & Authority Patents(China)
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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