High CTI value halogen free flame-retardant reinforced PBT composite material and preparation method thereof

A technology of composite materials and flame retardants, which is applied in the field of PBT composite materials, can solve the problems of high cost and low tracking index, and achieve the effects of less corrosion, less toxic smoke, and less impact on mechanical properties

Inactive Publication Date: 2010-05-19
GUANGDONG ALDEX NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, there are still some defects in the existing technology, such as high cost and low tracking index (CTI) compared to

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] The formula is: 48 parts by weight of PBT, 20 parts by weight of glass fiber, 16 parts by weight of sodium methylphenyl phosphate, 0.1 part by weight of calcium oxide, 0.3 parts by weight of antioxidant 1010, and 0.5 parts by weight of EBS;

[0082] The preparation method is:

[0083] (1) Dry the PBT for 7 hours at 110°C, and dry the flame retardant and glass fiber for 30 minutes;

[0084] (2) Mix the materials evenly in proportion and extrude them in a twin-screw extruder at 220°C;

[0085] (3) Cool the extrudate obtained in step (2) and cut into pellets, dry the particles at a temperature of 110°C for 7 hours and then perform injection molding. % conditions for 23 hours.

Embodiment 2

[0087] Formula: 64 parts by weight of PBT, 30 parts by weight of glass fiber, 22 parts by weight of methyl phenyl phosphate, 0.5 parts by weight of magnesium oxide, 1680.8 parts by weight of antioxidant, 0.4 parts by weight of EBS, 0.4 parts by weight of oxidized polyethylene wax;

[0088] The preparation method is:

[0089] (1) At 110°C, dry the PBT for 6 hours, and dry the flame retardant and glass fiber for 45 minutes;

[0090] (2) Mix the materials evenly in proportion and extrude them in a twin-screw extruder at 230°C;

[0091] (3) Cool the extrudate obtained in step (2) and cut into pellets, dry the particles at a temperature of 110°C for 8 hours and then perform injection molding. % conditions for 24 hours.

Embodiment 3

[0093] The formula is: 50 parts by weight of PBT, 22 parts by weight of glass fiber, 18 parts by weight of sodium methylphenyl phosphate, 0.15 parts by weight of magnesium oxide, 1680.3 parts by weight of antioxidant, and 0.5 parts by weight of oxidized montan wax;

[0094] The preparation method is:

[0095] (1) At 110°C, dry the PBT for 7 hours, and dry the flame retardant and glass fiber for 35 minutes;

[0096] (2) Mix the materials evenly in proportion and extrude them in a twin-screw extruder at 240°C;

[0097] (3) Cool the extrudate obtained in step (2) and cut into pellets, dry the particles at a temperature of 110°C for 9 hours and then perform injection molding. % under the conditions of 25 hours.

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Abstract

The invention relates to a PBT composite material, in particular to a high CTI value halogen free flame-retardant reinforced PBT composite material and a preparation method thereof. The PBT composite material comprises the following components in parts by weight: 48-64 parts of PBT, 20-30 parts of glass fibre, 16-22 parts of flame retardant, 0.1-0.5 part of CTI synergist, 0.3-0.8 part of anti-oxidant, and 0.5-0.8 part lubricant; wherein the flame retardant is prepared by comprising one or more components comprising methyl phenyl phosphate, methyl phenyl phosphate ester and methyl phenyl phosphite ester; the CTI synergist is prepared by comprising at least one of components comprising calcium oxide, magnesium oxide, and barium oxide; the anti-oxidant is prepared by comprising 1010 or 168; and the lubricant is prepared by comprising at least one of the components comprising EBS, oxidized lignite wax and oxidized polyethylene wax. The PBT composite material has the advantages of high CTI, environmental protection, high performance and the like.

Description

technical field [0001] The invention relates to a PBT composite material, in particular to a high CTI value halogen-free flame-retardant reinforced PBT composite material and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (PBT), also known as polytetramethylene phthalate, is a thermoplastic engineering plastic. Polybutylene terephthalate is crystalline, with a melting point of 224°C, a relative density of 1.31-1.55, and one of the lowest water absorption rates among thermoplastics. It has excellent toughness, fatigue resistance, impact strength, and natural Lubricity and wear resistance, small friction coefficient, but high notch sensitivity; good heat resistance, weather resistance, flame resistance, but slow burning; good dimensional stability, excellent electrical properties, good arc resistance. Polybutylene terephthalate molding can be injection molding, extrusion, blow molding, coating, welding, bonding, machining, vacuum formin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K13/04C08K5/52C08K5/523C08K5/526C08K3/22C08K7/14
Inventor 何顺伦张超
Owner GUANGDONG ALDEX NEW MATERIAL CO LTD
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