Dispersing method of PTFE superfine powder and application of dispersion liquid thereof in non-stick coating

A technology of non-stick coating and ultrafine powder, which is applied in the direction of coating, can solve the problems of adding, etc., and achieve the effect of convenient construction, enhanced flexibility and improved impact performance

Active Publication Date: 2015-09-09
科创(衢州)化工技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dispersion effect of the invention is ideal, which solves the technical deficiency of adding PTFE ultrafine powder in the existing non-stick coating

Method used

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  • Dispersing method of PTFE superfine powder and application of dispersion liquid thereof in non-stick coating
  • Dispersing method of PTFE superfine powder and application of dispersion liquid thereof in non-stick coating
  • Dispersing method of PTFE superfine powder and application of dispersion liquid thereof in non-stick coating

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Step 1: (1) Add 5.0g PTFE superfine powder, 0.5g dispersant, 6.5g mixed solvent, 28.0g high polyester modified silicone resin to the clean solvent successively, the weight of PTFE superfine powder accounts for the resin and 15.2% of the total weight of the PTFE ultrafine powder; (2) carry out dispersion stirring with a propeller, the stirring speed is 250rmp, the dispersion time is 3h, and the dispersion temperature is 25° C. to obtain the dispersion liquid of the PTFE ultrafine powder.

[0046] Step 2: Measure and weigh 28.0g high polyester modified silicone resin, 7.5g mixed solvent, 0.5g dispersant, 0.9g leveling agent, 0.3g defoamer, 0.1g non-stick additive, 10g talc powder, Add 1.7g of fumed silica R972 and 10.0g of white pigment into the grinding tank, grind and disperse for 2-6 hours, and filter to obtain the masterbatch of non-stick coating;

[0047] Step 3: Add the masterbatch of the non-stick coating obtained in step 2 to the dispersion of PTFE ultrafine powde...

Embodiment 2-10

[0050] Adopt the same method as in Example 1, prepare dispersion liquid and non-stick coating masterbatch according to the weight of table 1 and table 2, finally obtain non-stick coating:

[0051] The composition of table 1 embodiment 2-5

[0052]

[0053]

[0054] The composition of table 2 embodiment 6-10

[0055]

[0056] The dispersion liquid prepared by the embodiment of the present invention 1-10 is evaluated by the fineness method for dispersion uniformity; the non-stick coating prepared by the embodiment of the present invention 1-10 is evaluated for storage stability, and the non-stick coating is prepared according to the prescribed method. After making test samples (curing temperature 220°C, curing time 15min), performance evaluations such as adhesion, impact resistance, hardness and thermal hardness, chemical resistance, salt spray resistance, contact angle and non-stickiness were carried out; The coating is applied to the rubber product molding mold, and ...

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Abstract

The invention discloses a dispersing method of PTFE superfine powder and application of the dispersion liquid thereof in non-stick coating. The dispersing method of PTFE superfine powder comprises the following steps: (1) sequentially adding PTFE superfine powder, a dispersing agent, a solvent and resin into a clean solvent; and (2) stirring for dispersion with a propeller to obtain the dispersion liquid of the PTFE superfine powder, wherein the stirring speed is 200-300rmp, the dispersing time is 1-4h, and the dispersing temperature is lower than 30 DEG C. The invention also introduces application of the dispersion liquid and non-stick coating. The dispersing method of the PTFE superfine powder is simple in technology and convenient to operate and does not need additional equipment; and by adopting the method disclosed by the invention, the PTFE superfine powder and resin have perfect wetting dispersity and disperse system stability, second aggregation of the stored PTFE superfine powder is avoided, and the problem of dispersion of the PTFE superfine powder added into the coating as an additive is solved.

Description

technical field [0001] The invention relates to a method for dispersing ultrafine PTFE powder, and also relates to the application of the dispersion prepared by the method in non-stick coatings, belonging to the technical field of coatings and their production techniques. Background technique [0002] Non-stick coating is a special coating whose surface is not easy to be adhered by other sticky substances or easily removed after adhesion. This coating is non-stick due to its extremely low surface energy, low coefficient of friction, and easy sliding. [0003] Usually, PTFE ultrafine powder is added to the coating as an additive to improve the non-stickiness of the coating. The traditional process is to add PTFE ultrafine powder during the grinding process of non-stick coatings. Grinding can reduce the particle size of PTFE ultrafine powder, but the finer the grinding, the second The phenomenon of sub-agglomeration is also more serious. After a period of storage, the non-sti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L27/18C09D7/12C09D183/04
Inventor 刘海波肖瑞厚张广欣余晓斌
Owner 科创(衢州)化工技术开发有限公司
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