Ethylene-chlorotrifluoroethylene copolymer for melt blowing and preparation method thereof

A technology of chlorotrifluoroethylene and copolymers, applied in the direction of single-component synthetic polymer rayon, fiber chemical characteristics, non-woven fabrics, etc., can solve the problem of reducing the yield of non-woven fabrics prepared by melt blown and the fluidity of resin melt To reduce the risk of copolymer degradation and equipment energy consumption, low melting temperature and good mechanical strength, etc.

Pending Publication Date: 2022-04-15
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

The melting point of the polymer is too high, and the melt index is not large enough, so that the temperature of the screw is high when the melt blown is used to prepare non-woven fabrics, but if the screw temperature is lowered, the fluidity of the resin melt will become poor, which greatly reduces the melt blown preparation of non-woven fabrics. cloth yield
[0006] The prior art has no report on ethylene-chlorotrifluoroethylene copolymers with low melting temperature and ultrahigh melt index

Method used

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  • Ethylene-chlorotrifluoroethylene copolymer for melt blowing and preparation method thereof
  • Ethylene-chlorotrifluoroethylene copolymer for melt blowing and preparation method thereof

Examples

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Embodiment 1

[0041] This embodiment provides a preparation method of ethylene-chlorotrifluoroethylene copolymer for melt blowing, the preparation method comprising the following steps:

[0042] (1) Dissolve 7g of hydroxypropyl methylcellulose completely in 1L of pure water first, add the dissolved cellulose aqueous solution and 2.5L of pure water into a 5L reactor, start stirring at 300r / min, and vacuum the reactor with nitrogen Replace until the oxygen content in the reactor is lower than 10ppm;

[0043] (2) Add 400g chlorotrifluoroethylene, 13g perfluoroethyl vinyl ether, 10g n-propyl vinyl ether, 10g trifluorotrichloroethane, 35g chloroform to the reactor, and feed ethylene to the reactor pressure is 2.5MPa. Increase the stirring speed of the reactor to 500r / min, the temperature inside the reactor is raised to 50°C, and 2g of diisopropyl peroxydicarbonate is added to start the polymerization reaction;

[0044] (3) By continuously adding ethylene monomer, the pressure in the reactor wa...

Embodiment 2

[0052] This embodiment provides a preparation method of ethylene-chlorotrifluoroethylene copolymer for melt blowing, the preparation method comprising the following steps:

[0053] (1) Dissolve 7g of hydroxypropyl methylcellulose completely in 1L of pure water first, add the dissolved cellulose aqueous solution and 2.5L of pure water into a 5L reactor, start stirring at 300r / min, and vacuum the reactor with nitrogen Replace until the oxygen content in the reactor is lower than 10ppm;

[0054] (2) add 400g chlorotrifluoroethylene, 12g perfluoroethyl vinyl ether, 10g ethyl vinyl ether, 10g trifluorotrichloroethane, 35g chloroform in reactor again, pass into ethylene until reactor pressure is 2.5 MPa. Increase the stirring speed of the reactor to 500r / min, the temperature inside the reactor is raised to 50°C, and 2g of diisopropyl peroxydicarbonate is added to start the polymerization reaction;

[0055] (3) By continuously adding ethylene monomer, the pressure in the reactor wa...

Embodiment 3

[0059] This embodiment provides a preparation method of ethylene-chlorotrifluoroethylene copolymer for melt blowing, the preparation method comprising the following steps:

[0060] (1) Dissolve 7g of hydroxypropyl methylcellulose completely in 1L of pure water first, add the dissolved cellulose aqueous solution and 2.5L of pure water into a 5L reactor, start stirring at 300r / min, and vacuum the reactor with nitrogen Replace until the oxygen content in the reactor is lower than 10ppm;

[0061] (2) Add 400g chlorotrifluoroethylene, 13g perfluoropropyl vinyl ether, 10g n-propyl vinyl ether, 10g trifluorotrichloroethane, 45g isopropanol to the reaction kettle, and feed ethylene to the reaction The kettle pressure is 2.5MPa. Increase the stirring speed of the reactor to 500r / min, the temperature inside the reactor is raised to 50°C, and 2g of diisopropyl peroxydicarbonate is added to start the polymerization reaction;

[0062] (3) By continuously adding ethylene monomer, the pres...

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Abstract

The invention discloses an ethylene-trifluorochlor oethylene copolymer for melt blowing, comonomers of the ethylene-trifluorochlor oethylene copolymer comprise ethylene, trifluorochlor oethylene and a modified monomer A, and the modified monomer A is RX-(CF2) m-O-CF = CF2. The invention also discloses a preparation method of the ethylene-trifluorochlor oethylene copolymer for melt blowing. The ethylene-trifluorochlor oethylene copolymer disclosed by the invention has good mechanical strength, lower melting temperature and ultrahigh melt index, can be used for preparing melt-blown non-woven fabrics, and is suitable for filter elements for industrial filtration.

Description

technical field [0001] The invention belongs to the field of fluorine-containing polymer materials, and in particular relates to an ethylene-chlorotrifluoroethylene copolymer for melt blowing and a preparation method thereof. Background technique [0002] Electroplating is a process that uses electrolysis to attach a layer of metal film to the surface of metal or other materials. It is an indispensable and important link in the contemporary industrial chain. It can prevent metal oxidation (such as rust), and has the ability to improve wear resistance, Conductivity, light reflection, corrosion resistance (copper sulfate, etc.) and aesthetic enhancement, etc., are widely used in machinery manufacturing, aerospace, electronic devices, automotive appliances, special materials and other fields. In recent years, with the rapid development of my country's economy and strong demand for industrial products, the market for related equipment and accessories has grown rapidly, and the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/02C08F214/24C08F216/14C08F216/18C08F2/38C08F2/20D01F6/30D01F6/32D04H1/544D04H3/14
Inventor 张万里孙斌陈科陈卡凌沈翔
Owner ZHEJIANG RES INST OF CHEM IND CO LTD
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