Halogen-free flame-retardant master batch for continuous long glass fiber reinforced polypropylene and preparation method of halogen-free flame-retardant master batch

A technology of flame retardant masterbatch and polypropylene, which is applied in the field of flame retardant modification of engineering plastics, and can solve the problems that related technologies have not been reported publicly.

Active Publication Date: 2022-02-11
ZHEJIANG XUSEN NON HALOGEN SMOKE FLAME RETARDANT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the development of high-concentration piperazine pyrophosphate flame retardant masterbatch products used in LGFPP materials has become an effective solution, but related technologies have not yet been publicly reported

Method used

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  • Halogen-free flame-retardant master batch for continuous long glass fiber reinforced polypropylene and preparation method of halogen-free flame-retardant master batch
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  • Halogen-free flame-retardant master batch for continuous long glass fiber reinforced polypropylene and preparation method of halogen-free flame-retardant master batch

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preparation example Construction

[0030] The present invention also provides a method for preparing a halogen-free flame-retardant masterbatch for continuous long glass fiber reinforced polypropylene, which comprises the following steps:

[0031] STEP101: Provide raw materials for preparing the halogen-free flame-retardant masterbatch for continuous long glass fiber reinforced polypropylene, the raw material for the continuous long glass fiber reinforced polypropylene is made of polypropylene carrier, halogen-free flame-retardant agent, hyperdispersant, lubricant, coupling agent, and antioxidant;

[0032] STEP102: Feed the raw material components in the halogen-free flame retardant into a high-speed mixer according to the corresponding mass percentage, pre-mix for 5 minutes to 10 minutes, and discharge to obtain a uniformly mixed halogen-free flame retardant;

[0033] STEP103: Feed the polypropylene carrier, the hyperdispersant, the lubricant, the coupling agent and the antioxidant raw materials into a high-sp...

Embodiment 1

[0060] In embodiment 1, homopolypropylene and copolypropylene are mixed and used as the resin carrier of the masterbatch, and the melt index of the flame retardant masterbatch is higher than that of homopolypropylene used alone in contrast 1 and copolypropylene used alone in comparative example 2 as The masterbatch of the carrier shows that the mixed use of polypropylene carrier can improve the processing fluidity of the masterbatch. In addition, when the flame-retardant masterbatch prepared by using homopolypropylene alone as the carrier in Comparative Example 1 is applied to the continuous long glass fiber reinforced polypropylene material, the impact performance of the flame-retardant continuous long glass fiber reinforced polypropylene material is significantly reduced, and a slight float appears. fiber. Comparative Example 2 When the flame retardant masterbatch prepared by using copolymerized polypropylene alone as a carrier is applied to continuous long glass fiber reinf...

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Abstract

The invention discloses a halogen-free flame-retardant master batch for continuous long glass fiber reinforced polypropylene and a preparation method of the halogen-free flame-retardant master batch. The halogen-free flame-retardant master batch consists of a polypropylene carrier, a halogen-free flame retardant, a hyperdispersant, a lubricant, a coupling agent and an antioxidant. The polypropylene carrier is a mixture of homo-polypropylene and co-polypropylene resin. The halogen-free flame retardant comprises a low-melting-point lubricating flame-retardant auxiliary agent, and the low-melting-point lubricating flame-retardant auxiliary agent is one or a mixture of several of a phosphaphenanthrene derivative or a phosphazene derivative with the melting point lower than 170 DEG C. The halogen-free flame-retardant master batch for the continuous long glass fiber added polypropylene is extruded at the extrusion temperature of 170 DEG C-210 DEG C, and is granulated by a special long strip granulator for LFTPP under the tension action of a traction machine to obtain the halogen-free flame-retardant master batch for the continuous long glass fiber added polypropylene. The halogen-free flame-retardant master batch can improve the processing fluidity of the continuous long glass fiber reinforced polypropylene material and the uniform dispersion of powder, so that a product prepared from the continuous long glass fiber reinforced polypropylene material has better uniformity. The invention also provides a preparation method of the halogen-free flame-retardant master batch.

Description

technical field [0001] The invention relates to the technical field of flame-retardant modification of engineering plastics, in particular to a halogen-free flame-retardant master batch for continuous long glass fiber reinforced polypropylene and a preparation method thereof. Background technique [0002] Polypropylene (PP) is one of the five general-purpose plastics. It is a semi-crystalline thermoplastic. It has good mechanical properties and processing properties, and is cost-effective. It has been widely used in the fields of home appliances and automobiles. However, PP also has defects such as low strength, modulus, and hardness, poor low-temperature impact resistance, large molding shrinkage, easy aging, and flammability. In actual production applications, it is often necessary to toughen, fill, and flame-retardant And other modifications to meet the high performance requirements of the product. [0003] Long Glass Fiber Reinforced Polypropylene (LGFPP for short) is o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08K5/52C08K3/32C08K5/3492C08K3/22C08K5/5313C08K5/5399C08J3/22C08K7/14C08J5/04
CPCC08J3/226C08J5/043C08J2423/12C08J2423/14C08K5/52C08K2003/323C08K5/34922C08K2003/2296C08K5/5313C08K5/5399C08J2323/12C08K7/14
Inventor 庄严李金玉许肖丽李四新
Owner ZHEJIANG XUSEN NON HALOGEN SMOKE FLAME RETARDANT CO LTD
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