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Fluorine-containing dry demoulding agent and preparation method thereof

A release agent and dry technology, which is applied in the field of fluorine-containing dry release agent and its preparation, can solve the problems of increasing the number of demoulding times and a small amount of oil stains, so as to increase the number of demoulding times and excellent demoulding effect , the effect of reducing dosage

Inactive Publication Date: 2018-11-30
SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of the invention is simple, and the prepared fluorine-containing dry mold release agent can solve the problem that the surface of the injection molded part is stained with a small amount of oil after the existing mold release agent is demoulded, and the fluorine-containing dry mold release agent prepared by the invention It can increase the number of demoulding times after spraying the release agent once, reaching 15-20 times

Method used

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  • Fluorine-containing dry demoulding agent and preparation method thereof
  • Fluorine-containing dry demoulding agent and preparation method thereof
  • Fluorine-containing dry demoulding agent and preparation method thereof

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Embodiment l～4

[0034] A fluorine-containing dry mold release agent, the composition and formula of which are shown in Table 1, is prepared by the following process:

[0035] Step 1: Weigh the fluoropolymer and dissolve it in isopropanol while stirring as component A;

[0036] Step 2: Weigh polyethylene glycol (number average molecular weight between 800 and 1000) in isopropanol, heat and stir to dissolve, then add ethanol and stir evenly as component B;

[0037] Step 3: Add component A and component B to solvent oil and stir to dissolve, while stirring clockwise, slowly add crosslinking agent in a linear shape at the vortex of the stirring liquid, and continue stirring for 10 minutes to obtain a milky white product.

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Abstract

The invention discloses a fluorine-containing dry demoulding agent and a preparation method thereof. The fluorine-containing dry demoulding agent of the invention consists of the following componentsin percentages by weight: 0.2-0.5% of fluorine-containing polymer, 2.0-4.0% of polyethylene glycol, 2.0-5.0%of soybean lecithin, 1.0-2.5% of a cross-linking agent, 3.0-9.0% of isopropanol, 5.0-9.0% ofethanol, and 70-85% of solvent oil. The fluorine-containing dry demoulding agent is prepared by the method comprising the following steps: dissolving the fluorine-containing polymer in isopropanol tobe used as a component A; dissolving polyethylene glycol in isopropanol and ethanol to be used as a component B; and adding the component A and component B into the solvent oil, conducting stirring for dissolving, and finally adding the cross-linking agent, and performing stirring. The preparation method of the invention is simple, and the obtained fluorine-containing dry demoulding agent has nooil marks on the surfaces of the injection moulded parts due to the fluorine-containing ingredients, and does not affect the subsequent surface processing at all; because of the formation of a high-strength isolation film on the surface of the mould, the number of demoulding times is doubled.

Description

technical field [0001] The invention relates to the technical fields of injection mold release, rubber molding release and metal casting release, in particular to a fluorine-containing dry release agent and a preparation method thereof. Background technique [0002] Metal, rubber, plastic and other products are molded and processed in the mold, and the cured product is in contact with the surface of the mold. Due to micro-defects such as unevenness on the working surface of the mold, there will be a certain friction resistance when the product is peeled off from the mold. Or the two are bonded due to physical adsorption or chemical bonding, which makes it difficult to peel off the mold after the product is formed. In order to weaken the adsorption or bonding between the product and the mold, it is necessary to use a release agent. The working principle of the external-coated mold release agent is that the mold release agent forms a smooth and dense film on the surface of th...

Claims

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Application Information

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IPC IPC(8): C10M167/00C10N40/36
CPCC10M167/00C10M2207/021C10M2209/103C10M2213/06C10M2223/10C10N2040/36C10N2030/24C10N2030/56C10N2020/04
Inventor 周祖新王爱民何卫平
Owner SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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