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PBT modified powder and preparation method thereof

A powder and modification technology, applied in the field of PBT modified powder and its preparation, can solve the problems of low impact strength, limited application scope, poor hydrolysis resistance of pure PBT materials, and achieve good mechanical strength, excellent electrical properties, and hydrolysis resistance. good performance

Inactive Publication Date: 2015-08-19
QINGDAO WANLI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure PBT materials have disadvantages such as low notched impact strength, high brittleness, and poor hydrolysis resistance, which greatly limit their application range.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A PBT modified powder, the components of which are: 64% PBT, 20% heavy calcium carbonate with a particle size between 0.5μm and 20μm, 10% TPU, ethylene-methyl acrylate-methyl Glycidyl acrylate copolymer 3%, carbodiimide 1.2%, pentaerythritol stearate 0.8%, pyromellitic anhydride 0.5%, silane coupling agent 0.3%, antioxidant 0.2%. Wherein, the PBT is polybutylene terephthalate resin; the TPU is a thermoplastic polyurethane elastomer; the antioxidant is hindered phenolic antioxidant 1076 and phosphite with a mass ratio of 1:2 A compound of antioxidant 168.

[0019] Its preparation method is as follows: (1), dry PBT at 120°C-140°C for 4-6 hours, so that the moisture content is controlled below 0.03%, and it is ready for use; (2), weigh the particle size according to the mass percentage ratio. Add heavy calcium carbonate and silane coupling agent between 0.5 μm and 20 μm into a high-speed mixer, stir at 100°C to 120°C for 30 to 45 minutes to completely disperse and coat, t...

Embodiment 2

[0021] A PBT modified powder, the components of which are: 80% PBT, 10% heavy calcium carbonate with a particle size between 0.5μm and 20μm, 5% TPU, ethylene-methyl acrylate-methyl Glycidyl acrylate copolymer 2%, carbodiimide 1%, pentaerythritol stearate 1%, pyromellitic anhydride 0.5%, silane coupling agent 0.2%, antioxidant 0.3%. Wherein, the PBT is polybutylene terephthalate resin; the TPU is a thermoplastic polyurethane elastomer; the antioxidant is hindered phenolic antioxidant 1076 and phosphite with a mass ratio of 1:2 A compound of antioxidant 168.

[0022] Its preparation method is as follows: (1), dry PBT at 120°C-140°C for 4-6 hours, so that the moisture content is controlled below 0.03%, and it is ready for use; (2), weigh the particle size according to the mass percentage ratio. Add heavy calcium carbonate and silane coupling agent between 0.5 μm and 20 μm into a high-speed mixer, stir at 100°C to 120°C for 30 to 45 minutes to completely disperse and coat, then c...

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Abstract

The present invention discloses PBT modified powder and a preparation method thereof, wherein the PBT modified powder comprises, by mass, 60-80% of PBT, 5-20% of heavy calcium carbonate, 5-10% of TPU, 1-3% of a compatilizer, 0.5-1.5% of carbodiimide, 0.5-1% of pentaerythrityl tetrastearate, 0.1-0.5% of pyromellitic dianhydride, 0.1-0.5% of a silane coupling agent, and 0.1-0.5% of an antioxidant, wherein the compatilizer is an ethylene-methyl acrylate-glycidyl methacrylate copolymer. The PBT modified powder of the present invention has the following beneficial effects that: on the basis of the PBT, the toughness, the rigidity and the heat resistance are substantially improved while the good mechanical strength is maintained, the hydrolysis resistance is good, the size is stable, the processability is good, the electrical property is excellent, the preparation process is simple and easy to operate, the cost is low, and the industrial production is easily achieved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a PBT modified powder and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (PBT for short) is a milky white translucent to opaque, crystalline thermoplastic polyester, which is widely used for its fast crystallization speed, excellent electrical properties, good processability, and high weather resistance. . However, pure PBT materials have disadvantages such as low notched impact strength, high brittleness, and poor hydrolysis resistance, which greatly limit their application range. Contents of the invention [0003] The purpose of the present invention is to provide a PBT modified powder with good toughening, strengthening and hydrolysis resistance and a preparation method thereof. [0004] The technical solution adopted by the present invention to solve the technical problem is: a PBT modified powder, the composition of which...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L75/04C08L23/08C08K13/06C08K9/10C08K9/06C08K3/26
Inventor 不公告发明人
Owner QINGDAO WANLI TECH
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