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ECTFE (ethylene-chlorotrifluoroethylene copolymer) fluororesin with self-crosslinking structure, and preparation method thereof

A self-crosslinking and resin technology, applied in the field of fluororesin, can solve the problems of polymer decomposition, affecting polymer performance, increasing process steps, etc., and achieve the effect of stable performance

Inactive Publication Date: 2017-06-13
ZHEJIANG RES INST OF CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The modification method of the above-mentioned ECTFE polymer is basically realized by blending and radiation curing of ECTFE polymer and crosslinking agent, which not only increases the process steps, but also makes it difficult to control the radiation dose during radiation curing, which is easy to cause polymer decomposition, thereby affecting the performance of the polymer.

Method used

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  • ECTFE (ethylene-chlorotrifluoroethylene copolymer) fluororesin with self-crosslinking structure, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 55L of high-purity deionized water, 60g of PFOA and 100g of sodium bicarbonate were added to a 100L stainless steel high-pressure reactor, and the reactor was evacuated and replaced with nitrogen three times. After the replacement is qualified, add 10KG chlorotrifluoroethylene and 880g N-methylolacrylamide into the reactor, stir and raise the temperature to 80°C. After the temperature of the system is constant, add ethylene into the reactor with a compressor until the pressure is 1.5MPa , use a metering pump to add an aqueous initiator solution containing 20g of ammonium persulfate to the reactor to initiate polymerization, continue to feed ethylene, maintain the polymerization pressure at 1.5MPa, stop adding ethylene gas after 1.5 hours of reaction, cool down, and recover unreacted ethylene, Chlorotrifluoroethylene, put the material into the coagulation bucket through the discharge valve of the reactor, coagulate and dehydrate. The material was washed several times wit...

Embodiment 2

[0051] Add 60L of high-purity deionized water, 30g of PFOA, 80g of disodium hydrogen phosphate and 10g of diethyl malonate into a 100L stainless steel autoclave, and the reactor is evacuated and replaced with nitrogen three times. After the replacement is qualified, add 20KG chlorotrifluoroethylene and 240g N-methoxymethacrylamide into the reactor, stir and raise the temperature to 65°C. After the temperature of the system is constant, add ethylene into the reactor with a compressor until the pressure is 3.5 MPa, use a metering pump to add an aqueous initiator solution containing 15g potassium persulfate to the reactor to initiate polymerization, continue to feed ethylene, maintain the polymerization pressure at 3.5MPa, stop adding ethylene gas after 6 hours of reaction, cool down, and recover unreacted ethylene , Chlorotrifluoroethylene, put the material into the coagulation bucket through the discharge valve of the reactor, coagulate and dehydrate. The material was washed se...

Embodiment 3

[0054] Add 60L of high-purity deionized water, 240g of PFOA, and 100g of sodium bicarbonate into a 100L stainless steel autoclave, and the reactor is evacuated and replaced with nitrogen three times. After the replacement is qualified, add 10KG of chlorotrifluoroethylene and 770g of N-methoxymethacrylamide into the reactor, stir and raise the temperature to 70°C. After the temperature of the system is constant, add ethylene into the reactor with a compressor until the pressure is 3.5 MPa, use a metering pump to add an aqueous initiator solution containing 35g potassium persulfate to the reactor to initiate polymerization, continue to feed ethylene, maintain the polymerization pressure at 3.5MPa, and add 120g methylcyclopentadiene to the system through a metering pump after 1 hour of polymerization After 4 hours of reaction, the addition of ethylene gas is stopped, the temperature is lowered, unreacted ethylene and chlorotrifluoroethylene are recovered, and the materials are put...

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Abstract

The invention discloses ECTFE (ethylene-chlorotrifluoroethylene copolymer) resin with a self-crosslinking structure. A preparation monomer comprises ethylene, chlorotrifluoroethylene, alkoxy methyl (alkyl) acrylamide and a modified monomer A; the molar ratio of the ethylene to the chlorotrifluoroethylene to the alkoxy methyl (alkyl) acrylamide to the modified monomer A is (40-60):(60-40):(0.1-10):(0-5). The ECTFE resin provided by the invention can serve as a corrosion-resistant coating after being subjected to self-crosslinking solidification through heat treatment, and is particularly applicable to the field of chemical anticorrosion.

Description

technical field [0001] The invention relates to a fluororesin, in particular to an ECTFE fluororesin with a self-crosslinking structure. Background technique [0002] Fluorine-containing polymer materials have excellent high and low temperature resistance, dielectric properties, chemical stability, weather resistance, non-combustibility, non-stickiness and low friction coefficient, etc., and are indispensable and important materials for cutting-edge science and technology and defense industry. One of the important fluorine-containing polymer materials is ethylene-chlorotrifluoroethylene copolymer (ECTFE), which was first synthesized by DuPont Company of the United States. It is a thermoplastic fluorine-containing copolymer, which is suitable for most inorganic and organic chemicals and Organic solvents have extraordinary anti-corrosion ability, can be used safely in the temperature range of low temperature to 149 ℃, have outstanding mechanical properties, electrical properti...

Claims

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Application Information

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IPC IPC(8): C08F210/02C08F214/24C08F220/58C08F214/18C08F216/18C08F216/14
Inventor 孙斌张万里陈卡凌高自宏
Owner ZHEJIANG RES INST OF CHEM IND CO LTD
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