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High fluidity fluororesin slurry and preparation method thereof

A technology of fluororesin and high fluidity, applied in the field of polymer chemistry, can solve the problems of less modification of processing performance, decline of mechanical and electrical properties, etc., to improve stability and flow performance, volatile removal, lower threshold and Effect of molding defects

Active Publication Date: 2020-09-18
SHANDONG DONGYUE POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the reported literature mainly focuses on the modification of the mechanical, tribological and electrical properties of fluororesin, and the modification of its processing performance is less, and the mechanical and electrical properties after modification are significantly reduced, which cannot meet the requirements of high processing properties with good processing properties at the same time. Performance Fluorine Resin Requirements

Method used

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  • High fluidity fluororesin slurry and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The high-fluidity fluororesin slurry described in this embodiment and its preparation method, said method comprises the following steps:

[0033] a) Determination of solid content of PTFE resin stock solution:

[0034] Adopt density meter to measure the solid content of 1000g PTFE resin stoste to be 30wt%;

[0035] b) Pre-concentration:

[0036] The PTFE resin stock solution was placed in a 90°C oven and heated for 2h to layer the PTFE resin stock solution, and the fluororesin solution was separated from water with a pear-shaped fractionating flask to obtain 600g of PTFE resin pre-concentrate with a solid content of 50wt%.

[0037] c) addition of surfactant:

[0038] Add 0.225g C to the above PTFE resin pre-concentrate 3 f 7 OCF 2 CF 2 COONH 4 and 0.075g CF 3 O(CF 2 O) 4 CF 2 COOH is stirred by a four-blade stirrer to obtain a PTFE resin concentrate with good mechanical stability;

[0039] d) freezing:

[0040] Put the above-mentioned PTFE resin concentrate...

Embodiment 2

[0045] The high-fluidity fluororesin slurry described in this embodiment and its preparation method, said method comprises the following steps:

[0046] a) Determination of solid content of PTFE resin stock solution:

[0047] Adopt density meter to measure the solid content of 1000g PTFE resin stoste to be 30wt%;

[0048] b) Pre-concentration:

[0049] The PTFE resin stock solution was placed in a 60° C. oven and heated for 12 hours to layer the PTFE resin stock solution, and the fluororesin solution was separated from water with a pear-shaped fractionating flask to obtain 430 g of PTFE resin pre-concentrate with a solid content of 70 wt %;

[0050] c) addition of surfactant:

[0051] Add 2.1 g of CF to the above PTFE resin pre-concentrate 3 OCF (CF 3 )OCF(CF 3 )COOH and 0.9g C 2 f 5 OCF (CF 3 )OCF(CF 3 ) COOH, using four paddle stirrers to stir, obtain the better PTFE resin concentrated solution of mechanical stability;

[0052] d) freezing:

[0053] Put the above PT...

Embodiment 3

[0058] The high-fluidity fluororesin slurry described in this embodiment and its preparation method, said method comprises the following steps:

[0059] a) Determination of solid content of PTFE resin stock solution:

[0060] The solid content of the 1000g PTFE resin stock solution measured by a densitometer is 30wt.%.

[0061] b) Pre-concentration:

[0062] The PTFE resin stock solution was placed in a 75°C oven and heated for 8h to layer the PTFE resin stock solution, and the fluororesin solution was separated from water with a pear-shaped fractionating flask to obtain 460g of PTFE resin pre-concentrate with a solid content of 65wt.%.

[0063] c) addition of surfactant:

[0064] Add 0.5g CF to the above PTFE resin pre-concentrate 3 OCF (CF 3 )OCF(CF 3 )COOH and 1g C 2 f 5 OCF (CF 3 )OCF(CF 3 )COONH 4 , using a four-blade stirrer to stir to obtain a PTFE resin concentrate with good mechanical stability;

[0065] d) freezing:

[0066] Put the above-mentioned PTFE r...

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Abstract

The invention relates to the field of polymer chemistry, in particular to a high fluidity fluororesin slurry and a preparation method thereof. The extrusion stress of the high fluidity fluororesin slurry is 4.21-12.03 MPa, and the high fluidity fluororesin slurry comprises the following components in parts by weight: 100 parts of fluororesin, 0.1-1 part of a fluorocarbon surfactant and 5-25 partsof deionized water. The high fluidity fluororesin slurry is prepared by adopting a freezing, unfreezing and condensing method, the dispersed slurry has a high solid content, high fluidity, high stability and good forming precision, the processing and forming of conventional resin can be realized, and the processing and forming threshold and forming defects of fluororesin are reduced. Compared withadditive oil added by pasty extrusion, the stability and the fluidity of the fluororesin slurry can be improved by adding a small amount of surfactant, and the fluororesin slurry has the characteristics of small addition amount and easiness in volatilization and removal, and can be applied to the field of medicine.

Description

technical field [0001] The invention relates to the field of polymer chemistry, in particular to a high-fluidity fluororesin slurry and a preparation method thereof. Background technique [0002] Fluorine resin refers to the general C fluorocarbon resin in polymers, which is a type of polymer in which all or part of the hydrogen atoms connected to the carbon chain in the main chain or side chain are replaced by fluorine atoms. Common fluorocarbon resins include polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer (PFA), polyfluoroethylene propylene (FEP), etc., which are generally fluorine-containing monomers, Such as tetrafluoroethylene (TFE), hexafluoropropylene, etc. obtained by free radical polymerization. [0003] Fluorine resin has a structure in which F atoms are densely arranged around the C-C main chain, which can play a protective role. Compared with traditional polymer materials, it has incomparable characteristics and advanta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/03C08L27/18C08L27/20
CPCC08J3/03C08J2327/18C08J2327/20
Inventor 孟烨桥陈越周熠智马鹏飞周鹏飞
Owner SHANDONG DONGYUE POLYMER MATERIAL
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