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Supported beta crystal core formation agent and preparation method thereof

A crystal nucleating agent and a supported technology, applied in the field of beta crystal nucleating agent and its preparation, can solve the problems of poor compatibility with PP, low nucleation efficiency, coloring of products, etc., so as to improve the nucleation efficiency and solve the problem of yielding Effects of low strength and modulus, increased nucleation points

Active Publication Date: 2008-04-09
SUN YAT SEN UNIV
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Problems solved by technology

However, some of the above β-crystal nucleating agents have problems such as low nucleation efficiency, high cost, low heat resistance, poor compatibility with PP, and easy coloring of products.

Method used

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  • Supported beta crystal core formation agent and preparation method thereof

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Embodiment Construction

[0018] Aliphatic dicarboxylic acid is dissolved in acetone, mixed with nano-calcium carbonate at room temperature, and the acetone solvent is volatilized at 15°C to obtain a supported β-crystal nucleating agent. Then add β-crystal nucleating agent to polypropylene to prepare high-content β-crystal polypropylene.

[0019] Table 1 shows the ingredient distribution ratio and polypropylene β-crystal content of the supported β-crystal nucleating agent in each embodiment of the present invention.

[0020] Table 1. β crystal content of polypropylene with supported β crystal nucleating agent

[0021]

[0022] The WAXD curves of the embodiments of the present invention are shown in Figures 1 and 2. The WAXD curves in Figures 1 and 2 show that the polypropylene added with a supported β-crystal nucleating agent has only the diffraction peaks of β-crystal polypropylene, and basically no diffraction peaks of α-crystal polypropylene. See Table 1 for the content.

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Abstract

The present invention discloses a load-type Beta-nucleating agent and a preparation method thereof, the load-type Beta-nucleating agent of the present invention consists of nano calcium carbonate and aliphatic dicarboxylic acid, and the weight ratio of which is 5 to 1000: 1. The present invention adopts the nano calcium carbonate with a big surface area as a carrier, adopts a simple method to highly disperse the dicarboxylic acid on the nano-calcium carbonate surface, makes use of a chemical reaction of the nano-calcium carbonate and the dicarboxylic acid to form the high efficient beta-nucleating agent which is the same with the mixture of pimelic acid and calcium stearate aiming at the problems of the existing beta-nucleating agents. The present invention realizes the purposes of reducing the consumption of the dicarboxylic acid, reducing the cost and improving the nucleating efficiency as the dicarboxylic acid on the nano-calcium carbonate is highly dispersed and the effective nucleating points are only formed on the surface of the nano-calcium carbonate.

Description

technical field [0001] The invention relates to a beta crystal nucleating agent and its preparation technology. Background technique [0002] β-crystalline polypropylene is a new variety of polypropylene. In addition to maintaining the good comprehensive properties of α-crystalline polypropylene, it also has several times the impact strength of α-crystalline polypropylene and thermal deformation The temperature is greatly increased, low tensile yield strength and tensile elastic modulus, high toughness and ductility under high-speed stretching, and obvious strain hardening. It will have a wide range of applications in industrial pipelines, battery casings, membranes, microporous membranes and microporous fibers for gas exchange. At present, adding β-crystal nucleating agent is the most effective way to obtain high-content β-crystal polypropylene. So far, β-crystal nucleating agents mainly include: (1) organic dyes. Such as quinacridone red (E3B) and other condensed-ring o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K13/02C08K3/26C08K5/11C08F110/06
Inventor 麦堪成章自寿郑军军
Owner SUN YAT SEN UNIV
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