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Flame retardant composition and application thereof, PBT composite material and preparation method thereof

A technology of flame retardant composition and composite material, which is applied in the field of flame retardant materials, and can solve the problems of easy decomposition, decreased mechanical properties of PBT materials, low flame retardant and anti-dripping properties, etc.

Active Publication Date: 2022-08-09
ZHEJIANG XINHUA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these halogen-free flame retardants still have some shortcomings, such as resorcinol bis(diphenyl phosphate) flame retardants are liquid, inconvenient to use, low thermal decomposition temperature, low flame retardant efficiency, flame retardant and anti-dripping Low dropability; hypophosphite flame retardants are easy to decompose during use, there is a risk of explosion, and it will lead to a serious decline in the mechanical properties of PBT materials

Method used

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  • Flame retardant composition and application thereof, PBT composite material and preparation method thereof

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preparation example Construction

[0046] An embodiment of the present invention also provides a method for preparing a PBT composite material, which includes the following steps S10-S20.

[0047] Step S10 , mixing the flame retardant composition, polybutylene terephthalate and coupling agent according to the raw material ratio of the above-mentioned PBT composite material to obtain a mixture.

[0048] In some of the embodiments, in step S10, the conditions for mixing the flame retardant composition, polybutylene terephthalate and coupling agent are: mixing at 80° C.˜120° C. for 10 min˜15 min.

[0049] It can be understood that the above-mentioned mixing step can be performed in any device in the art that can mix substances. Specifically, the above-mentioned mixing step is performed in a high-speed mixer, and the rotation speed of the high-speed mixer is 600 rmp to 900 rmp.

[0050] In some of these embodiments, before the step of mixing the flame retardant composition, the polybutylene terephthalate and the co...

Embodiment 1

[0058] 1) Coupling 57.5kg PBT, 11kg aluminum diethylphosphinate, 3kg melamine polyphosphate, 2kg melamine cyanurate, 0.8kg organic montmorillonite (DK2 type), 0.2kg aluminum phosphite, 0.5kg silane The agent is placed in a high-speed mixer, and mixed for 12 minutes at a temperature of 90 ° C and a stirring speed of 700 rmp.

[0059] 2) Add the uniformly mixed mixture in step 1) into the feeding hopper of the twin-screw extruder that has been preheated to the set temperature, and the material is heated and melted while being mixed and transported to the front by screw rotation, and 25kg long glass fibers are quantitatively quantified. It is added from the exhaust port in the middle of the extruder, mixed with the melt, extruded through the die of the extruder, in the shape of a strip, cooled in a water tank, and then pelletized by a pelletizer to obtain a modified composite material.

[0060] The twin-screw extruder sets heating temperature distribution zones T1 to T9 in sequen...

Embodiment 2

[0063] 1) Place 55.5kg PBT, 12kg aluminum diethylphosphinate, 4kg melamine polyphosphate, 2kg melamine cyanurate, 1kg organic montmorillonite (DK2 type), 0.5kg silane coupling agent in a high-speed mixer , and mix for 12 minutes at a temperature of 90° C. and a stirring speed of 700 rmp.

[0064] 2) Add the uniformly mixed mixture in step 1) into the feeding hopper of the twin-screw extruder that has been preheated to the set temperature, and the material is heated and melted while being mixed and transported to the front by screw rotation, and 25kg long glass fibers are quantitatively quantified. It is added from the exhaust port in the middle of the extruder, mixed with the melt, extruded through the die of the extruder, in the shape of a strip, cooled in a water tank, and then pelletized by a pelletizer to obtain a modified composite material.

[0065] The twin-screw extruder sets heating temperature distribution zones T1 to T9 in sequence according to the flow direction of...

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Abstract

The invention relates to a flame retardant composition and its application, a PBT composite material and a preparation method thereof. The components of the flame retardant composition include: 55wt%-65wt% aluminum diethylphosphinate, 15wt%-26wt% melamine polyphosphate, 10wt%-15wt% melamine cyanurate, 4wt%-8wt% Organically modified montmorillonite and 0-5wt% aluminum phosphite. When the flame retardant composition is melt-mixed with main materials such as PBT to prepare a flame retardant material, the obtained flame retardant material can be decomposed to form a coke layer during the combustion process. The nitrogen-containing compound in the combustion composition also has the functions of foaming and coke enhancement, and the aluminum phosphite can play a synergistic flame retardant and whitening effect, so that the flame retardant material obtained has good flame retardancy and can be maintained well. mechanical properties.

Description

technical field [0001] The invention relates to the technical field of flame retardant materials, in particular to a flame retardant composition and its application, a PBT composite material and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (PBT for short) is a thermoplastic engineering plastic with wide sources and low price, but its mechanical properties and flame retardant properties are low, which limits its application in the engineering field. One technique attempts to modify polybutylene terephthalate with a flame retardant to improve its flame retardant properties. It is reported that the flame retardants used are generally halogen-free flame retardants, such as halogen-free flame retardants resorcinol bis (diphenyl phosphate) or hypophosphite. These flame retardants are low-smoke and halogen-free, and can improve Flame retardant properties of polybutylene terephthalate. However, these halogen-free flame retardants still hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/04C08K3/34C08K3/32C08K5/5313C08K5/52C08K5/3492C08L67/02C08K13/06C08K7/14C08J5/04
CPCC08K9/04C08K3/346C08K3/32C08K5/5313C08K5/5205C08K5/34928C08J5/043C08K2201/011C08J2367/02C08K13/06C08K7/14
Inventor 应思斌周健章震王超远吴杨杨祝航洪晔谢自强陈攀
Owner ZHEJIANG XINHUA CHEM
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