Preparation method for polyvinylidene fluoride with high molten fluidity

A polyvinylidene fluoride and vinylidene fluoride technology, applied in coatings, powder coatings, etc., can solve the problems of poor melt fluidity and late start of PVDF powder coatings, and achieve easy control, good thermochemical stability, and mild reaction conditions. Effect

Active Publication Date: 2011-07-27
SHANDONG HUAXIA SHENZHOU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, due to the late start of PVDF powder coatings, there is little research on polymer resins for PVDF powder coatings. The present invention aims at producing a special high melting flowable polymer resin

Method used

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  • Preparation method for polyvinylidene fluoride with high molten fluidity

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Cumene hydroperoxide and dicumyl peroxide are mixed in a molar ratio of 1:2 as an organic initiator, and ammonium perfluorooctanoate solution with a mass concentration of 10% is added to prepare an organic initiator solution with an organic initiator concentration of 3 wt%. ; Add a regulator to prepare a mixed organic initiator solution with a regulator content of 3 wt %; the regulator is ethyl propionate. A mixed organic initiator solution was obtained.

[0031] Add 7kg of deionized water, 120g of paraffin, and 60g of 10wt% perfluorooctanoic acid ammonium solution to a 10L polymerization kettle; evacuate and remove oxygen until the oxygen content is ≤ 20ppm; When the temperature reaches 135°C and the pressure of the kettle reaches 4.0 MPa, inject 145 g of the prepared mixed organic initiator solution with a metering pump, and finish within 10 minutes. Start the polymerization reaction, and after 15 minutes, inject 400 g of the above-mentioned mixed organic initiator s...

Embodiment 2

[0033] Embodiment 2: As described in Embodiment 1, the difference is that the molar ratio of cumene hydroperoxide and dicumyl peroxide is 1: 2 mixed as an organic initiator, and the perfluorooctanoic acid ammonium with a mass concentration of 10wt% is added The solution is prepared as an organic initiator solution with an organic initiator concentration of 2.0 wt%. A regulator ethyl propionate was added to prepare a mixed organic initiator solution with a regulator content of 2 wt%.

Embodiment 3

[0034] Embodiment 3: The molar ratio of cumene hydroperoxide and dicumyl peroxide is 1:3 mixed as an organic initiator, and ammonium perfluorooctanoate solution with a mass concentration of 10% is added to prepare an organic initiator concentration of 3 wt%. The organic initiator solution; add regulator ethyl propionate, be mixed with the organic initiator solution that regulator content is 3wt%.

[0035] Taking a 10L polymerization kettle as an example, add 7.0kg of deionized water, 120g of paraffin, and 60g of 10wt% perfluorooctanoic acid ammonium solution to the cleaned polymerization kettle; evacuate and remove oxygen until the oxygen content is ≤ 20ppm; then raise the temperature of the polymerization kettle Boost the pressure and add the monomer. After the temperature and pressure of the polymerization kettle reach 135°C and pressure 4.0MPa, quickly pour in 145g of the prepared mixed organic initiator solution with a metering pump, and finish within 10 minutes. Start the p...

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Abstract

The invention relates to a preparation method for polyvinylidene fluoride with high molten fluidity. The initiator used for the polymerization is an organic initiator comprising organic hydrogen peroxide and organic peroxide with a molar ratio of 1-5, and the used conditioning agent is an ester conditioning agent with high dispensing efficiency for the system; the addition way of the initiator and the conditioning agent is a continuous addition way; the polymerization condition is mild; the polymerization product has a stable end group and a moderate molecular weight with a narrow distribution coefficient; and the product has high molten fluidity, good thermochemical stability, and significantly improved mechanical properties and weatherability.

Description

technical field [0001] The invention relates to a polymerization process of a fluorine-containing polymer with high melt fluidity, in particular to a preparation method of polyvinylidene fluoride with high melt fluidity. Background technique [0002] Polyvinylidene fluoride (PVDF) fluorocarbon coatings have been proven to be the best metal architectural coatings in the application process for more than 40 years, and can keep buildings beautiful and new for a long time. PVDF powder fluorocarbon coating is prepared from 70% PVDF resin and inorganic ceramic pigments. The combination of two raw materials provides the highest level of weather protection for high-end buildings. The coating provides high gloss and color retention on the basis of long-term guarantee of coating integrity. Coatings can protect buildings in the harshest natural environments for a long time with the ability to resist dirt, chalking and UV decomposition. Coatings meet or exceed stringent AAMA 2605 sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F114/22C08F4/38C08F2/38C09D127/16C09D5/03
Inventor 王军刘秀芬王汉利于克波姬生涛
Owner SHANDONG HUAXIA SHENZHOU NEW MATERIAL
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