Corrosion-resistant fluoroplastic aqueous dispersion

A water-based dispersion liquid, fluoroplastic technology, applied in the direction of coating, etc., to achieve the effect of inhibiting the reproduction of microorganisms, no toxic side effects, and less stimulation to the human body

Active Publication Date: 2021-05-28
SHANDONG DONGYUE POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the anti-corrosion PTFE aqueous dispersion that can satisfy these characteristics has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The polymerization solution under the polymerization conditions in Example 1 of patent CN 1180364A is used as the concentrated stock solution of the examples and comparative examples of the present invention. The particle size of the polymerization solution is 0.20um, and the weight content of polytetrafluoroethylene is 30%.

[0028] Take 3000 g of the above-mentioned fluoroplastic water-based polymerization solution, add 54 g of emulsifier (emulsifier brand 15-S-9, DOW company) and stir well, add ammonia water to adjust the pH of the polymerization solution to 9; put the polymerization solution in a 3 L plastic bottle Put it in a water bath to raise the temperature. When the temperature reaches 75°C, let it stand for a period of time. The upper layer forms a transparent aqueous solution layer, and the lower layer is a concentrated liquid layer. Remove the upper aqueous layer to obtain a fluoroplastic concentrate;

[0029] Adding deionized water to the prepared fluorine ...

Embodiment 2

[0038] According to the operation steps in Example 1, the antiseptic fluoroplastic aqueous dispersion is prepared, and the preservative is different, which is 450 mg of methylparaben; the performance test is carried out on the prepared dispersion, and the test process is the same as in Example 1. Test The results are shown in Table 1.

Embodiment 3

[0040] According to the operation steps in Example 1, the antiseptic fluoroplastic aqueous dispersion is prepared, and the preservative is different, which is 450 mg of ethylparaben; the performance test is carried out on the prepared dispersion, and the test process is the same as in Example 1. Test The results are shown in Table 1.

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Abstract

The invention relates to an anti-corrosion fluoroplastic aqueous dispersion liquid, which belongs to the technical field of anti-corrosion coatings. The aqueous dispersion includes a preservative and a fluoroplastic aqueous dispersion. The preservative is an organic compound containing the general formula 1, and its acute toxicity is: rat oral LD50: >2000 mg / kg; the general formula 1 is: XO— R—CO 2 A; where X is a hydrogen atom or a sodium ion, R is an aromatic hydrocarbon organic group with 6 carbon atoms, and A is —CH 3 、—CH 2 CH 3 、—CH 2 CH 2 CH 3 or—CH 2 CH 2 CH 2 CH 3 One of; XO—and—CO 2 The position of A on R is paraposition. The antiseptic fluoroplastic aqueous dispersion provided by the invention has good antibacterial and antiseptic capabilities, extremely low toxicity and is environmentally friendly, and meanwhile, can maintain the viscosity and mechanical stability of the fluoroplastic aqueous dispersion.

Description

technical field [0001] The invention relates to an anti-corrosion fluoroplastic aqueous dispersion liquid, which belongs to the technical field of anti-corrosion coatings. Background technique [0002] In aqueous dispersions of fluoroplastics, the stability of microorganisms is very important for long-term product preservation. Therefore, it is necessary to add a preservative with special efficacy not only to inhibit the growth of microorganisms, but also to have a bactericidal effect and low toxicity. Therefore, in order to maintain the excellent quality of the fluoroplastic aqueous dispersion, it is very important to add a certain amount of preservatives. [0003] In the patent CN 95194526.2, a preservative of an organic compound that has a hydroxyl group or a methylene group that can release formaldehyde is recorded. This preservative is not friendly to the environment, has relatively high toxicity, and is highly irritating to the human body. There is no record in this p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/18C08K5/101C09D127/18C09D7/63
CPCC08K5/101C08L2201/54C09D127/18C09D7/63C08L27/18
Inventor 周鹏飞陈越韩桂芳
Owner SHANDONG DONGYUE POLYMER MATERIAL
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