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Polypropylene composite nucleating agent based on calcium sulfate whiskers and preparing method of polypropylene composite nucleating agent

The technology of calcium sulfate whisker and composite nucleating agent is applied in the field of polypropylene nucleating agent, the composite nucleating agent of calcium sulfate whisker and organic nucleating agent, and can solve the problem of large usage of calcium sulfate whisker, etc. Achieve the effect of improving nucleation capacity, improving mechanical properties and overcoming large dosage

Inactive Publication Date: 2016-08-03
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, calcium sulfate whiskers have the disadvantage of using a large amount as an inorganic filler.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: a kind of preparation method of the polypropylene composite nucleating agent based on calcium sulfate whisker of the present embodiment is carried out according to the following steps:

[0014] (1) Surface modification of calcium sulfate whiskers: calcium sulfate whiskers and silane coupling agent at 100 0 C, the stirring rate is 650r / min, uniformly mixed and modified for 5min. Wherein the amount of silane coupling agent is 0.4%;

[0015] (2) Disperse the surface-modified calcium sulfate whiskers obtained in step (1) in absolute ethanol, and ultrasonically obtain a uniformly dispersed modified calcium sulfate whisker dispersion, the ultrasonic frequency is 70kHz~90kHz, Ultrasound time 15min~30min;

[0016] (3) Sodium 4,6-di-tert-butylphenyl phosphate was dissolved in N,N-dimethylformamide, and then mixed with the modified calcium sulfate whisker dispersion obtained in step (2) at high speed Uniformly mixed under stirring conditions to prepare microemuls...

Embodiment 2

[0018] Embodiment 2: Different from Embodiment 1, the surface modifier in step one is stearic acid.

Embodiment 3

[0019] Example 3: Different from Example 1, the surface modifier in step (1) is a titanate coupling agent.

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Abstract

The invention discloses a polypropylene composite nucleating agent based on calcium sulfate whiskers and a preparing method of the polypropylene composite nucleating agent .The composite nucleating agent is prepared by combining an organic nucleating agent and calcium sulfate whiskers .The preparing method of the nucleating agent comprises the following steps that firstly, calcium sulfate whiskers are subjected to surface modification and then dispersed into absolute ethyl alcohol, and the organic nucleating agent is dissolved into an organic solvent; secondly, the two solutions obtained in the first step are mixed evenly and stirred for 3-5 min at a high speed to be mixed evenly, and then a micro emulsion solution is obtained; thirdly, the micro emulsion solution obtained in the second step is subjected to suction filtration and then dried at 50 DEG C for 24 h, and the target nucleating agent is obtained .The composite nucleating agent has the advantages of being efficient, low in cost and the like, and the preparing method is simple in operation process and can be used for industrial production .

Description

technical field [0001] The invention relates to a polypropylene nucleating agent, in particular to a composite nucleating agent of calcium sulfate whiskers and an organic nucleating agent, which belongs to the field of new materials. Background technique [0002] Polypropylene (PP) is a semi-crystalline thermoplastic. It has good mechanical properties, non-toxicity, heat resistance, low relative density, and can be processed into injection molding products, hollow molding products, films, sheets and fibers with various uses, thus becoming one of the fastest growing varieties of plastic production. It occupies the second place among the five general-purpose plastics, so it is widely used in daily necessities, packaging materials, office supplies, electrical appliances and auto parts. [0003] As a non-polar polymer, polypropylene has poor dyeability, antistatic properties and compatibility with polar polymers and inorganic fillers, and the side methyl groups on the molecular...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K9/06C08K9/04C08K9/00C08K7/08C08K5/527
CPCC08K9/06C08K5/527C08K7/08C08K9/00C08K9/04C08L2205/24C08L23/12
Inventor 张跃飞何彬刘抱江友周
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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