Modified PVDF (Polyvinylidene Fluoride) material, and preparation method and application thereof

A modification and raw material technology, which is applied in the field of material preparation and application, can solve the problems of poor precision of finished products, high cost and high shrinkage of PVDF materials, etc., to reduce shrinkage, reduce material costs, improve processability and mechanical strength Effect

Inactive Publication Date: 2018-01-09
北鸿科定州新材料科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems in the prior art that the shrinkage rate of PVDF material is large, modification and adjustment is required, or a specially designed mold is required, the precision of the finished product is poor, and the cost of PVDF material is high, the present invention provides a new modified PVDF material

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  • Modified PVDF (Polyvinylidene Fluoride) material, and preparation method and application thereof
  • Modified PVDF (Polyvinylidene Fluoride) material, and preparation method and application thereof
  • Modified PVDF (Polyvinylidene Fluoride) material, and preparation method and application thereof

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Embodiment Construction

[0035] In order to enable those skilled in the art to better understand the solutions of the present invention, the present invention will be further described in detail below in conjunction with specific embodiments.

[0036]Polyvinylidene fluoride (abbreviated as PVDF) is a resin with a large shrinkage rate. PVDF has better fluidity, but the shrinkage varies from 2.5% to 2.8% in different molds and process conditions. Therefore, when designing the mold, it is important to accurately determine the shrinkage rate of the product in all directions, but for products with strict size requirements such as the pump head of the metering pump, it is also necessary to adjust the shrinkage rate of PVDF resin through modification. It is necessary to modify PVDF to reduce shrinkage and reduce material cost through blending modification. The modification mainly includes adding inorganic mineral powder for melt blending and granulation.

[0037] 1. Main raw materials

[0038] nam...

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Abstract

The invention discloses a modified PVDF (Polyvinylidene Fluoride) material, and a preparation method and application thereof. The modified PVDF material is prepared from the following raw materials inparts by weight: 61 to 71 parts of PVDF granules, 25 to 35 parts of inorganic mineral powder which is treated by using a titanate coupling agent, 2 to 6 parts of a compatilizer, 0.01 to 1 part of antioxidants, 0.01 to 1 part of calcium stearate and 0.01 to 1 part of N,N'-ethylene distearic amide. The preparation method for the modified PVDF material specifically comprises the following steps: pre-treating the inorganic mineral powder; drying the PVDF granules in a constant-temperature vacuum drying box, then mixing the dried PVDF granules, the inorganic mineral powder and the compatilizer ata high speed, and discharging the mixed material for later use; adding antioxidant 1098, antioxidant 168, the calcium stearate and EBS (Ethylene Bis-Stearamide), fully mixing, fusing, extruding and granulating to obtain a finished material; drying the finished material; performing injection moulding on the finished material.

Description

technical field [0001] The invention belongs to the field of material preparation and application, and in particular relates to a modified PVDF material, a preparation method and application thereof. Background technique [0002] PVDF mainly refers to a homopolymer of vinylidene fluoride or a copolymer of vinylidene fluoride and other small amounts of fluorine-containing vinyl monomers. It has the characteristics of both fluororesins and general-purpose resins. , Oxidation resistance, weather resistance, and radiation resistance, it also has special properties such as piezoelectricity, dielectricity, and pyroelectricity. It is the second largest product in fluorine-containing plastics, with a global annual production capacity of more than 5.3 tons. [0003] PVDF is a resin with a large shrinkage rate. The shrinkage rate of plastics refers to the percentage of the difference between the size of the plastic part at the molding temperature and the size after it is taken out of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08L33/12C08K13/06C08K9/04C08K3/26C08K3/34C08K7/08C08K7/14
Inventor 郑同利郭小刚张翠羽郝景林郑同超
Owner 北鸿科定州新材料科技有限公司
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