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A kind of preparation method of polyvinylidene fluoride resin used for solar back panel film

A technology of polyvinylidene fluoride resin and solar back sheet film, applied in the field of polymerization, to achieve the effect of stable end groups, narrow molecular weight distribution and good yellowing

Active Publication Date: 2016-04-27
SHANDONG HUAXIA SHENZHOU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems of crystal point and high-temperature yellowing that are difficult to overcome in the solar backboard film in the prior art, the present invention provides a preparation method of polyvinylidene fluoride resin used in the solar backboard film, which can obtain a narrow molecular weight distribution, end group Stable polyvinylidene fluoride resin, which can meet the requirements of solar backsheet film on PVDF yellowing and crystal point

Method used

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  • A kind of preparation method of polyvinylidene fluoride resin used for solar back panel film

Examples

Experimental program
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Effect test

Embodiment 1

[0031] In a 10L horizontal reactor, add 6L of deionized water, 40g of perfluorooctanoic acid ammonium solution with a mass concentration of 30%, and 100g of paraffin wax as an anti-sticking agent. Evacuate and remove oxygen until the oxygen content is ≤ 20ppm. Then raise the temperature of the polymerization kettle, and increase the pressure by filling the polymerization kettle with vinylidene fluoride monomer at the same time. When the pressure of the polymerization kettle reaches 3.0 MPa and the temperature of the kettle reaches 65°C, use a metering pump to quickly inject 15g of the initial initiator in 20 minutes. Solution, initiator is the tert-amyl peroxyneodecanoate solution of mass concentration 15%; Start polymerization reaction, after 15min, squeeze into 200g, the molecular weight regulator ethyl propionate solution of mass concentration 10% with metering pump at a constant speed, and 15g of tert-amyl peroxyneodecanoate solution with a mass concentration of 15% (additi...

Embodiment 2

[0034] As described in Example 1, the difference is that the initiator concentration is 10wt%, the first addition is 20g, and the additional addition is 30g; the concentration of the regulator ethyl propionate solution is 5wt%, and the addition is 400g.

Embodiment 3

[0036] As described in Example 1, the difference is that the molecular weight regulator is changed to ethyl acetate. Concentration, dosage are identical with embodiment 1.

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Abstract

The invention relates to a preparation method of polyvinylidene fluoride resin for a solar backboard film. According to the method, an initiator for polymerization is an organic lipoperoxide initiator being low in reaction activation energy, and an adjustor for polymerization is low molecular weight ester with high adjusting efficiency, wherein the concentration of the initiator is 10-30% and the concentration of the adjustor is 5-30%. The continuous feeding manner is adopted, the polymerization condition is mild, the temperature is 64.5-66.5 DEG C, the pressure of a kettle is 2.95-3.15MPa, the end group of a polymerization product is stable and the molecular weight of the polymerization product is controllable in size, and the distribution coefficient is narrow. The obtained polyvinylidene fluoride product cannot be yellowed, is free from big crystal points and can satisfy the demand on technical indexes of the solar backboard film.

Description

technical field [0001] The invention relates to a preparation method of a polyvinylidene fluoride resin used as a solar backboard film, and belongs to the technical field of polymerization. Background technique [0002] Polyvinylidene fluoride (PVDF for short) is a thermoplastic resin, a linear crystalline polymer with good heat resistance and corrosion resistance. It can be used for a long time at -50°C-150°C; PVDF has good chemical stability and is resistant to corrosion and swelling of oxidants, acid-base salts, halogen aromatic hydrocarbons, fats, and chlorinated solvents; PVDF has excellent UV resistance and aging resistance. The film will not be brittle or cracked for a long time outdoors; PVDF has excellent rigidity, hardness, creep resistance, wear resistance and cutting resistance, and its tensile strength is the highest among fluoroplastics; its decomposition The temperature is high (390°C) and the melting point is low (150°C-175°C), so the thermal stability is go...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F114/22C08F2/38C08F4/34
Inventor 王汉利李秀芬唐妮王军张鹏李鑫
Owner SHANDONG HUAXIA SHENZHOU NEW MATERIAL
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