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PFA color master batch, preparation method thereof and PFA pre-coloring material

A color masterbatch and particle technology, applied in the field of PFA resin, can solve problems such as poor pigment dispersibility, and achieve the effects of high dispersibility, simple preparation method and friendly working environment

Pending Publication Date: 2022-03-04
LICHANG TECH GANZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the purposes of the present invention is to provide a method for preparing PFA masterbatch, which solves the technical problem of poor pigment dispersibility in the preparation process of existing PFA masterbatch

Method used

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  • PFA color master batch, preparation method thereof and PFA pre-coloring material
  • PFA color master batch, preparation method thereof and PFA pre-coloring material
  • PFA color master batch, preparation method thereof and PFA pre-coloring material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for preparing PFA color masterbatch, comprising the following steps:

[0036] Add 5g of fluorine-containing green reactive dye to 20g of deionized water, add 100g of PFA emulsion to the dye solution under stirring, and its solid content is 45%. After agglomeration at 15°C for 10 minutes, green PFA particles are precipitated, and most of the water is filtered through a vibrating sieve, and the particles are dried at 150°C for 9 hours to obtain green PFA. The green PFA particles are added to the twin-screw extruder, The temperature of each section from zone 1 to zone 9 is as follows: 310°C, 310°C, 310°C, 315°C, 325°C, 335°C, 325°C, 325°C, 340°C, and the PFA green masterbatch is made by melt extrusion granulation .

[0037] A PFA pre-coloring material, the above-mentioned PFA green masterbatch and transparent PFA pellets are prepared by melting, blending, extruding and granulating through a twin-screw extruder at a weight ratio of 1:12 to obtain PFA green pellets...

Embodiment 2

[0039] A method for preparing PFA color masterbatch, comprising the following steps:

[0040] Add 10g of fluorine-containing black reactive dye to 20g of deionized water, add 100g of PFA emulsion to the dye solution under the condition of stirring, its solid content is 40%, after stirring and mixing evenly, add coagulant ammonia water, adjust the pH value to 9, After agglomeration at 15°C for 10 minutes, black PFA particles were precipitated, and most of the water was filtered through a vibrating sieve, and the particles were dried at 150°C for 9 hours to obtain black PFA, and the red PFA particles were added to the twin-screw extruder. The temperature of each section from the first zone to the ninth zone is: 310°C, 310°C, 310°C, 315°C, 325°C, 335°C, 325°C, 325°C, 340°C, and the PFA black masterbatch is made by melt extrusion granulation .

[0041] A PFA pre-coloring material, the above-mentioned PFA black masterbatch and transparent PFA pellets in a weight ratio of 1:20 are ...

Embodiment 3

[0043]A method for preparing PFA color masterbatch, comprising the following steps:

[0044] Add 12g of fluorine-containing red reactive dye to 20g of deionized water, add 100g of PFA emulsion to the dye solution under stirring, and its solid content is 35%. After agglomeration at 15°C for 10 minutes, red PFA particles were precipitated, and most of the water was filtered through a vibrating sieve, and the particles were dried at 150°C for 9 hours to obtain red PFA. The yellow PFA particles were added to the twin-screw extruder, The temperature of each section from zone 1 to zone 9 is as follows: 310°C, 310°C, 310°C, 315°C, 325°C, 335°C, 325°C, 325°C, 340°C, PFA red masterbatch is made by melt extrusion granulation .

[0045] A PFA pre-coloring material, the above-mentioned PFA red masterbatch and transparent PFA pellets are prepared in a weight ratio of 1:15 through a twin-screw extruder to produce PFA red pellets.

[0046] Performance Testing

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Abstract

The invention provides a PFA color master batch preparation method, which comprises: dissolving an active dye in water to form a dye solution, adding the dye solution to a PFA emulsion, uniformly stirring, adding a coagulant, adjusting the pH value to 8-10, stirring at a high speed at a temperature of 10-30 DEG C to precipitate PFA particles, filtering, and drying the PFA particles to obtain a powdery PFA color master batch resin, and granulating by a twin-screw machine to obtain the PFA color master batch. According to the preparation method of the PFA color master batch, the color master batch is prepared by adopting a liquid phase method, the reactive dye is uniformly dispersed in the PFA resin in a liquid phase environment, the PFA particles are separated out by adding the coagulant, and then drying granulation is performed, so that the PFA color master batch which is uniform in pigment dispersion and small in color difference is prepared.

Description

technical field [0001] The invention belongs to the technical field of PFA resins, and in particular relates to a PFA color masterbatch, a preparation method of the PFA color masterbatch, and a precolor prepared from the color masterbatch. Background technique [0002] Soluble PTFE is formed by free radical copolymerization of tetrafluoroethylene (TFE) and perfluoroalkyl vinyl ether (PAVE), referred to as PFA. PFA retains the excellent properties of polytetrafluoroethylene (PTFE), and has good chemical inertness, heat resistance, non-combustibility, anti-adhesion, dielectric properties, etc. base, which significantly improves the flexibility of the polymer chain, has good thermoplasticity, and can be melt-processed like ordinary thermoplastics, with a melting point of 300-315°C. It is suitable for making corrosion-resistant parts, wear-reducing and wear-resistant parts, seals, insulating parts and medical equipment parts, high-temperature wires, cable insulation layers, ant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08F2/30C08F214/26C08F216/14C08J3/22
CPCC08J3/226C08F214/262C08F216/1408C08F2/30C08J2427/18C08J2327/18
Inventor 冯兴文何发春钟城辉刘志富
Owner LICHANG TECH GANZHOU
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