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Self-lubricating non-stick molten aluminum environment-friendly coating, coating film and preparation method of self-lubricating non-stick molten aluminum environment-friendly coating

An environmentally friendly coating and self-lubricating technology, which is applied in coatings, manufacturing tools, casting molding equipment, etc., can solve the problems of harsh application process conditions, toxic cast aluminum release agent, and complicated preparation process, and achieve easy preparation and high effect Excellent, temperature-resistant and stable results

Active Publication Date: 2020-08-28
陕西宝塔山油漆股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the above-mentioned defects in the prior art, the object of the present invention is to provide a self-lubricating non-stick aluminum-melting environmentally friendly coating and a preparation method thereof, which solves the problem of toxicity and the preparation process of the existing cast aluminum release agent. Complicated, harsh application process conditions, high temperature, high energy consumption, not environmentally friendly, easy cracking of the coating film and powder drop problems

Method used

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  • Self-lubricating non-stick molten aluminum environment-friendly coating, coating film and preparation method of self-lubricating non-stick molten aluminum environment-friendly coating
  • Self-lubricating non-stick molten aluminum environment-friendly coating, coating film and preparation method of self-lubricating non-stick molten aluminum environment-friendly coating
  • Self-lubricating non-stick molten aluminum environment-friendly coating, coating film and preparation method of self-lubricating non-stick molten aluminum environment-friendly coating

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preparation example Construction

[0042] The invention provides a method for preparing an environmentally friendly paint that is self-lubricating and does not stick to molten aluminum, comprising:

[0043] 1) Mix the silane coupling agent containing amino group or epoxy group, deionized water and tetramethylammonium hydroxide according to the mass ratio of (20~60):(30~50):(0.1~1), Ultrasonic dispersion for 30 minutes, hydrolysis at room temperature for 7 days, and preparation of polysiloxane oligomer aqueous solution I with a viscosity lower than 100 mPa·S;

[0044] Among them, silane coupling agents containing amino groups include 3-aminopropyltrimethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, 3-ureapropyltrimethoxysilane, Bis-[3-(methoxysilyl)-propyl]-amine or 3-anilinopropyltrimethoxysilane.

[0045] Silane coupling agents containing epoxy groups include 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-(2,3-epoxypropoxy)propyltrimethoxysilane or 3-(2,3-Glycidoxy)propylmethyltrimethoxysilane....

Embodiment 1

[0053] (1) Prepare 3-aminopropyltrimethoxysilane, deionized water (DI), and tetramethylammonium hydroxide (TMAH) according to the mass ratio of 20:30:0.2, disperse them with ultrasonic waves for about 30 minutes, and then It was hydrolyzed for 7 days at normal temperature (23±2° C.) to prepare polysiloxane oligomer aqueous solution I with a viscosity lower than 100 mPa·S.

[0054] ⑵Put 20 parts of deionized water (DI) into the beaker, add 10 parts of BYK-190 dispersant to it at the speed of 100rpm / min, disperse for 8min, and add 2 parts of dipropylene glycol butyl ether, 30 10 parts of boron nitride, 10 parts of talcum powder, 10 parts of low temperature glass powder, 5 parts of Al 2 o 3 Disperse it for 25min.

[0055] (3) After dispersion, add 3 parts of gas phase SiO 2 , and then dispersed for 5 minutes to prepare the aqueous slurry II.

[0056] (4) Mix polysiloxane oligomer aqueous solution Ⅰ and slurry Ⅱ according to different ratios of 10:90, ultrasonically disperse f...

Embodiment 2

[0059] (1) N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, deionized water (DI), tetramethylammonium hydroxide (TMAH) and other materials are mixed according to the mass ratio of 30:35:0.2 Proportional configuration, ultrasonic dispersion for about 30 minutes, and then hydrolysis at room temperature (23±2°C) for 7 days to prepare polysiloxane oligomer aqueous solution I with a viscosity lower than 100mPa·S.

[0060] ⑵Put 60 parts of deionized water (DI) into the beaker, add 2 parts of BYK-190 dispersant to it at the speed of 200rpm / min, disperse for 5min, add 5 parts of dipropylene glycol butyl ether, 40 Parts of boron nitride, 15 parts of talcum powder, 15 parts of low temperature glass powder, 5 parts of Al 2 o 3 Disperse it for 30min.

[0061] (3) After dispersion, add 2 parts of gas phase SiO 2 , and then dispersed for 10 minutes to prepare the aqueous slurry II.

[0062] (4) Mix polysiloxane oligomer aqueous solution I and slurry II according to different ratios of 15...

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Abstract

The invention discloses a self-lubricating non-stick molten aluminum environment-friendly coating, a coating film and a preparation method of the self-lubricating non-stick molten aluminum environment-friendly coating. The preparation method comprises the following steps of mixing a silane coupling agent containing amino or epoxy groups, deionized water and tetramethylammonium hydroxide, and carrying out ultrasonic dispersion and hydrolysis to prepare a polysiloxane oligomer aqueous solution I; conducting stirring continuously, and sequentially adding dipropylene glycol butyl ether, boron nitride, talcum powder, low-temperature glass powder and Al2O3 for dispersing; adding gas-phase SiO2 for dispersing so as to prepare water-based slurry II; and mixing the polysiloxane oligomer aqueous solution I and the slurry II, and carrying out ultrasonic dispersion to prepare the self-lubricating non-stick molten aluminum environment-friendly coating. The coating film prepared from the coating hasthe advantages of stability, reliability, no toxicity, no powder falling, cracking, discoloration and gasification on the surface at 800 DEG C, self-lubricating property, no adhesion of molten aluminum, capability of being used as an environment-friendly, clean and efficient release agent for cast aluminum, the simple preparation process, convenience in construction, environmental friendliness and the like.

Description

technical field [0001] The invention belongs to the preparation coating technology of organic-inorganic hybrid materials, and in particular relates to a self-lubricating and non-stick melting aluminum environmental protection coating and coating film and a preparation method thereof. Background technique [0002] Aluminum and its alloys are widely used as lightweight, high-strength materials in industrial applications. Generally, sand molds are used to shape the aluminum after electrolysis. Since the sand molds are generally hot-pressed with phenolic resin and fine sand, the repeated application is low and the production efficiency is affected. Secondly, the sand molds are continuously crushed and bonded with solid resin to shape, dust It is relatively large and has a serious impact on the environment. Again, sand molds are difficult to improve the dimensional accuracy of aluminum castings. After using self-lubricating non-stick melting aluminum coating, not only sand molds...

Claims

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Application Information

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IPC IPC(8): B22C3/00
CPCB22C3/00
Inventor 陈杰史素青李斌赵辉来信米笑飞郑渊钊褚竹竹
Owner 陕西宝塔山油漆股份有限公司
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