Preparation method of polyvinylidene fluoride resin for solar backboard film

A technology of polyvinylidene fluoride resin and solar backsheet film, which is applied in the field of polymerization to achieve the effects of narrow molecular weight distribution, stable end groups, and mild polymerization conditions

Active Publication Date: 2014-04-30
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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  • Preparation method of polyvinylidene fluoride resin for solar backboard film

Examples

Experimental program
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Effect test

Embodiment 1

[0031] In a 10L horizontal reaction kettle, add 6L of deionized water, 40g of ammonium perfluorooctanoate solution with a mass concentration of 30%, and 100g of paraffin as an anti-sticking kettle agent. Then, the temperature of the polymerization kettle was increased, and the pressure was increased by charging the vinylidene fluoride monomer into the polymerization kettle. When the pressure of the polymer kettle reached 3.0 MPa, and the temperature of the kettle reached 65 °C, 15g of initial initiator was quickly injected with a metering pump in 20 minutes. solution, the initiator is a 15% mass concentration of tert-amyl peroxyneodecanoate solution; start the polymerization reaction, after 15min, inject 200g, mass concentration 10% molecular weight regulator ethyl propionate solution at a constant speed with a metering pump, and 15g of tert-amyl peroxyneodecanoate solution with a mass concentration of 15% (additional initiator), the molecular weight regulator and the additiona...

Embodiment 2

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

Embodiment 3

[0036] As described in Example 1, the difference is that the molecular weight modifier is changed to ethyl acetate. The concentration and dosage are the same as those in Example 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 polyvinylidene fluoride resin used as a solar back sheet film, and belongs to the technical field of polymerization. Background technique [0002] Polyvinylidene fluoride (PVDF for short) is a thermoplastic resin, which is a linear crystalline polymer with good heat and corrosion resistance. It can be used for a long time at -50℃-150℃; PVDF has good chemical stability, and can resist the corrosion and swelling of oxidants, acid-base salts, halogen aromatic hydrocarbons, aliphatics and chlorinated solvents; PVDF has excellent anti-ultraviolet and anti-aging properties. The film will not be brittle or cracked when placed outdoors for a long time; PVDF has excellent rigidity, hardness, creep resistance, wear resistance and cutting resistance, and its tensile strength is higher than that of fluoroplastics; its decomposition The temperature is high (390℃), and the melting point is low (150℃-175℃), so the the...

Claims

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Application Information

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Patent Type & Authority Applications(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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