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Halogen-free flame-retardant PBT resin with high CTI and preparation method of halogen-free flame-retardant PBT resin

A PBT resin and flame retardant technology, applied in the field of high CTI halogen-free flame retardant PBT resin and its preparation, can solve the problems of low char formation rate and low flame retardant efficiency, achieve high flame retardant level, increase CTI value, Improve the effect of interaction force

Inactive Publication Date: 2019-02-15
浙江富丽新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using phosphorus-based or nitrogen-based flame retardants alone has the disadvantage of low char formation rate, resulting in low flame retardant efficiency

Method used

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  • Halogen-free flame-retardant PBT resin with high CTI and preparation method of halogen-free flame-retardant PBT resin
  • Halogen-free flame-retardant PBT resin with high CTI and preparation method of halogen-free flame-retardant PBT resin
  • Halogen-free flame-retardant PBT resin with high CTI and preparation method of halogen-free flame-retardant PBT resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Each raw material ratio of table 1 embodiment 1

[0028]

[0029]

[0030] Mix components B and C, then place them in a high-speed mixer, and pre-mix for 20 minutes; then add component A to components B and C in a high-mix state, and mix for 7 minutes; then put the high-mix mixture Add it into the co-rotating parallel twin-screw extruder at a temperature of 190-230°C (the first zone is 190°C, the second zone is 200°C, the third zone is 210°C, the fourth zone is 210°C, the fifth zone is 230°C, the sixth zone is 230°C, and the seventh zone is 230°C. Zone 220°C, Zone 8 210°C, Zone 9 210°C, Head 200°C), melt extrusion and granulation.

Embodiment 2

[0032] Each raw material ratio of table 2 embodiment 2

[0033]

[0034] The steps used in the preparation method are the same as in Example 1

Embodiment 3

[0036] Table 3 Embodiment 3 each raw material proportioning

[0037]

[0038] The steps used in the preparation method are the same as in Example 1

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Abstract

The invention provides halogen-free flame-retardant PBT resin with high CTI and a preparation method of the halogen-free flame-retardant PBT resin. The halogen-free flame-retardant PBT resin is prepared from components in parts by weight as follows: 40-70 parts of PBT resin, 18-24 parts of a composite flame retardant, 1-5 parts of a CTI synergist, 10-30 parts of reinforcing filler, 0.4-2 parts ofa lubricant, 0.2-1 part of an antioxidant and 0.2-2 parts of a coupling agent. The method comprises the following steps: (1) the reinforcing filler is subjected to pretreatment: 10-30 parts by weightof the reinforcing filler is weighed and subjected to surface treatment with the coupling agent mainly in a manner that the compound coupling agent and the reinforcing filler are premixed in a high-speed mixer for 10-30 min; (2) 40-70 parts of the PBT resin, 18-24 parts of the composite flame retardant, 1-5 parts of the CTI synergist, 10-30 parts of the reinforcing filler, 0.4-2 parts of the lubricant and 0.2-1 part of the antioxidant are added to the mixture in step (1) and mixed at a high speed for 5-8 min, the mixture is subjected to extrusion and granulation by a twin-screw extruder at 190-230 DEG C, and halogen-free flame-retardant PBT resin with high CTI is obtained; (3) injection molding is performed by an injection molding machine at 190-230 DEG C.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a high CTI halogen-free flame-retardant PBT resin and a preparation method thereof. Background technique [0002] PBT is polybutylene terephthalate or polybutylene terephthalate, which belongs to thermoplastic polyester and is formed by polycondensation of 1,4-butanediol and terephthalic acid or terephthalate It is a milky white translucent to opaque, crystalline thermoplastic polyester resin made through a kneading process. [0003] Flame-retardant PBT is the most widely used in its modified applications, widely used in electronics, electrical, home appliance industries, such as connectors, transformers, fuse casings, switches, relays, energy-saving lamps, coil skeletons, motor casings, etc. The industry has strict requirements on combustion and safety. Flame-retardant PBT can well meet the demanding performance requirements of these industries, so it has a broad market in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L23/06C08L23/12C08K9/06C08K7/14
CPCC08K2201/004C08L67/02C08L2201/02C08L2201/22C08L2205/03C08L23/06C08K9/06C08K7/14C08L23/12
Inventor 陈芝芳栾国俊蔡新焱钟卫平叶立军
Owner 浙江富丽新材料有限公司
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