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Reinforced flame-retardant low-warpage PBT alloy material and preparation method thereof

An alloy material and low warpage technology are applied in the field of reinforced flame retardant and low warpage PBT alloy materials and their preparation, which can solve the problems that the products do not have flame retardant properties and the difficulty of crystalline polymer PBT, and achieve good mechanical properties, The effect of improving glass fiber orientation and reducing production costs

Inactive Publication Date: 2020-06-16
中广核瑞胜发(厦门)新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the injection molded products will shrink due to the crystallization of PBT, and warpage will occur, which makes it difficult for the crystalline polymer PBT to be widely used in precision and large-scale finished products; There are still hidden concerns

Method used

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  • Reinforced flame-retardant low-warpage PBT alloy material and preparation method thereof

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preparation example Construction

[0034] The present invention also includes a method for preparing an enhanced flame-retardant low-warpage PBT alloy material, comprising the following steps:

[0035] Step 1, pass polybutylene terephthalate, polycarbonate, inorganic filler, compound flame retardant, toughening agent, compound antioxidant, lubricant, transesterification inhibitor and anti-dripping agent through The high-speed mixer mixes evenly at high speed to obtain mixed materials;

[0036] Step 2: Add the mixed material to the main feed port of the twin-screw extruder, and the glass fiber to the side feed port of the twin-screw extruder, melt, extrude, cool, dry, and cut into pellets.

[0037] The temperature of each section of the barrel of the twin-screw extruder is set at 210-250° C., and the screw speed is 350 rpm.

Embodiment 1

[0040] (1) Weigh each component by weight: PBT: 44 parts, PC: 7 parts, ordinary alkali-free glass fiber: 22 parts, calcium carbonate: 10 parts, brominated epoxy: 8.5 parts, antimony trioxide: 2 parts, ethylene-methyl acrylate copolymer: 6 parts, antioxidant 1010: 0.1 part, antioxidant 168: 0.1 part, lubricant PETS (pentaerythritol stearate): 0.2 part, triphenyl phosphite: 0.1 part, 0.1 part of polytetrafluoroethylene;

[0041] (2) After the raw materials other than glass fiber are mixed evenly in the high mixer, the glass fiber is fed from the side feeding port, and melted and extruded through the extruder. The extrusion temperature is 210-250°C, and the screw speed is 350rpm. Then cool, dry, and cut into pellets to get the product.

Embodiment 2

[0043] (1) Weigh each component by weight: PBT: 44 parts, PC: 7 parts, ordinary alkali-free glass fiber: 22 parts, kaolin: 10 parts, brominated epoxy: 8.5 parts, antimony trioxide: 2 Parts, ethylene-methyl acrylate copolymer: 6 parts, antioxidant 1010: 0.1 part, antioxidant 168: 0.1 part, lubricant PETS: 0.2 part, triphenyl phosphite: 0.1 part, polytetrafluoroethylene 0.1 part share;

[0044] (2) After mixing the raw materials other than glass fiber evenly in the high mixer, the glass fiber is fed from the side feeding port, and melted and extruded through the extruder. The extrusion temperature is 210-240 ° C, and the screw speed is 350 rpm. Then cool, dry, and cut into pellets to get the product.

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Abstract

The invention discloses a reinforced flame-retardant low-warpage PBT alloy material and a preparation method thereof. The alloy material comprises the following components in parts by weight: 35-50 parts of polybutylene terephthalate, 5-15 parts of polycarbonate, 15-30 parts of glass fiber, 5-15 parts of an inorganic filler, 5-20 parts of a compound flame retardant, 5-10 parts of a toughening agent, 0.2-0.4 parts of a compound antioxidant, 0.1-0.3 parts of a lubricant, 0.1-0.3 parts of an ester exchange inhibitor, and 0.1-0.3 parts of an anti-dripping agent. The preparation method comprises the following steps: uniformly mixing all the materials except the glass fiber at a high speed, respectively feeding the mixed material and the glass fiber into a main feeding hole and a side feeding hole of a double-screw extruder, and finally forming the material. The amorphous polymer PC is introduced into the raw materials, so that the crystallinity of the system is reduced, the warping propertyof the PBT material is improved, and the PBT can be reinforced and toughened; and a compound flame retardant is introduced, so that the product has a flame-retardant characteristic. Finally, the PBT / PC alloy material has good mechanical properties, flame retardance and warping resistance, so that the application range of the PBT / PC alloy material in the fields of high-grade electrical components,household electrical shells and the like is expanded.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to an enhanced flame-retardant low-warpage PBT alloy material and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (PBT) has excellent heat resistance, good molding processability and electrical insulation properties, so it is widely used in electronic and electrical, automotive switch and other industries. However, the injection-molded products will shrink due to the crystallization of PBT, and warpage will occur, which makes it difficult for the crystalline polymer PBT to be widely used in precision and large-scale finished products; and the products do not have flame retardancy. There are still hidden concerns. Therefore, it is urgent to develop PBT materials with both anti-warping and flame-retardant properties. Contents of the invention [0003] The purpose of the present invention is to provide an enhanced flame-retardant low...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L69/00C08L23/08C08L27/18C08L63/00C08K13/04C08K7/14C08K3/26C08K3/22C08K3/34C08K5/134C08K5/526C08K5/103C08J5/04
CPCC08J5/043C08K2201/014C08K2003/265C08K13/04C08K7/14C08K3/2279C08K5/1345C08K5/526C08K5/103C08K3/346C08J2367/02C08J2469/00C08J2423/08C08J2427/18C08J2463/00
Inventor 蔡明辉朱云超张伟强万勇军李少钦邹怿聃
Owner 中广核瑞胜发(厦门)新材料有限公司
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