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Low-after-shrinkage and high-toughness flame-retardant PBT/PC composition and preparation method and application thereof

A technology of aftershrinkage and high toughness, applied in the field of engineering plastics, can solve the problems of reduced toughness and low aftershrinkage, and achieve the effects of reducing shrinkage, low aftershrinkage, and avoiding toughness decline

Active Publication Date: 2022-02-01
KINGFA SCI & TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a low after-shrinkage, high-toughness flame-retardant PBT / PC composition in order to overcome the defects of adding talcum powder in the above-mentioned composite material to improve the shrinkage rate after baking and to cause a decrease in toughness

Method used

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  • Low-after-shrinkage and high-toughness flame-retardant PBT/PC composition and preparation method and application thereof
  • Low-after-shrinkage and high-toughness flame-retardant PBT/PC composition and preparation method and application thereof
  • Low-after-shrinkage and high-toughness flame-retardant PBT/PC composition and preparation method and application thereof

Examples

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preparation example Construction

[0047] The preparation method of described low aftershrinkage, high-toughness flame-retardant PBT / PC composition, comprises the steps:

[0048] S1. Mix the dried PBT resin and PC resin with toughener, brominated flame retardant, sodium antimonate, ethylene-vinyl acetate polymer, antioxidant, transesterification inhibitor, and lubricant to obtain a premix material;

[0049] S2. Extruding the premix in step S1, cooling, blowing dry, pelletizing and packaging to obtain a low after-shrinkage, high-toughness flame-retardant PBT / PC composition; the processing temperature of the extrusion is 220-250°C.

[0050]Intrinsic viscosity test method: Weigh 0.5g sample, dissolve it in 100mL of 60 / 40 (wt / wt) phenol / tetrachloroethane, and then use Ubbelohde viscometer to perform intrinsic viscosity test at a constant 25°C .

[0051] Melt index test method: according to standard ISO 1133.

Embodiment 1～7

[0053] Examples 1-7 provide a series of low after-shrinkage, high-toughness flame-retardant PBT / PC compositions, and the specific component contents are shown in Table 1.

[0054] The component content (part) of table 1 embodiment 1~7

[0055] Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 PBT resin A 37 35 40 35 35 35 35 PC resin A 33 35 30 35 35 35 35 Ethylene-vinyl acetate copolymer 5 4 6 4 4 4 4 Sodium Antimonate 4 3 5 3 3 3 3 Toughener A 8 7 6 7 — — 7 Toughener B — — — — 7 — — Toughener C — — — — — 7 — Brominated Flame Retardant A 13 12 15 — 13 13 13 Brominated Flame Retardant B — — — 13 — — — transesterification inhibitor 0.05 0.1 0.2 0.1 0.1 0.1 0.1 antioxidant 0.3 0.2 0.1 0.2 0.2 0.2 0.2 lubricant 1 0.3 0.5 0.3 0.3 0.3 0.3

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Abstract

The invention discloses a low-after-shrinkage and high-toughness flame-retardant PBT / PC composition and a preparation method and application thereof. The PBT / PC composition comprises the following components in parts by weight: 35-40 parts of PBT resin; 30-35 parts of PC resin; 4-6 parts of an ethylene-vinyl acetate copolymer; 3-5 parts of sodium antimonate; 6-8 parts of a toughening agent; 12-15 parts of brominated flame retardant; 0.05-0.2 part of a transesterification inhibitor; 0.1-0.3 part of an antioxidant; 0.5-1 part of a lubricant; the brominated flame retardant is brominated polycarbonate and / or brominated polystyrene. The PBT / PC composition has low after-shrinkage, high toughness and high flame retardant property, and is especially suitable for preparing electronic component products in a high-temperature working environment.

Description

technical field [0001] The invention relates to the technical field of engineering plastics, in particular to a low after-shrinkage, high-toughness flame-retardant PBT / PC composition and a preparation method and application thereof. Background technique [0002] Polybutylene terephthalate (PBT) is a crystalline thermoplastic with fast crystallization speed, good chemical resistance and heat resistance, but it also has large molding shrinkage and low notched impact strength. and other shortcomings. As an amorphous engineering plastic, polycarbonate (PC) has excellent comprehensive properties, especially high impact strength and good dimensional stability, but PC has poor fluidity, poor solvent resistance, easy wear and high price. Blending PBT and PC can learn from each other and obtain an alloy material with excellent comprehensive properties. Although the performance of PBT and PC blending has been improved, there are still some defects in terms of shrinkage, especially f...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L69/00C08L23/08C08L25/06C08K3/22
CPCC08L67/02C08L69/00C08L2201/02C08K2003/2282C08L23/0853C08L25/06C08K3/2279
Inventor 莫文杰陈平绪叶南飚陈伟冯德才朱文付学俊王琪
Owner KINGFA SCI & TECH CO LTD
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