Oil-in-water silicone emulsion composition for die casting release agent

An oil-in-water emulsion and emulsion composition technology, which is applied in the petroleum industry, transportation and packaging, chemical/physical processes, etc., can solve the problems of rough die-casting surface, prolapse, unfavorable products, etc., and achieve high coating performance, casting Reduced surface roughness and excellent mold release properties

Inactive Publication Date: 2017-08-29
WACKER CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the high-temperature performance of the release agent is insufficient, a problem that occurs is that the die-casting surface of the product becomes rough, for example, seizing, air holes, molten aluminum flow marks, etc. occur, which is not conducive to easily releasing the product from the mold. prolapse and adversely affect the quality of the product

Method used

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  • Oil-in-water silicone emulsion composition for die casting release agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] 47.5 parts by weight component (A) namely viscosity is 5 * 10 5 mPa·s organopolysiloxane 1 (WACKER (trademark) GM 191 RELEASE AGENT manufactured by Wacker Chemie AG) modified with long-chain alkyl and aralkyl groups and 1 part by weight of benzoiso Thiazolone was added to 51.5 parts by weight of silica dispersion 1. The mixture was then stirred continuously using an Ultra-Turrax (trade mark) to prepare the emulsion composition in Example 1. The release resistance of the prepared emulsion was measured according to the above-mentioned measurement method, and the roughness of the release surface (casting surface) was evaluated according to the above-mentioned evaluation method. The evaluation results are shown in Table 1.

Embodiment 2

[0058] Prepare the emulsion composition among the embodiment 2 in the same manner as embodiment 1, difference is that component (A) use viscosity is 1.2 * 10 5 Long-chain alkyl- and aralkyl-modified organopolysiloxane 2 of mPa·s (WACKER (trademark) TN SILICONE RELEASE AGENT manufactured by Wacker Chemie AG). The release resistance of the prepared emulsion composition was measured according to the above-mentioned measurement method, and the roughness of the release surface (casting surface) was evaluated according to the above-mentioned evaluation method. The evaluation results are shown in Table 1.

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Abstract

An oil-in-water emulsion composition for a die casting release agent, the oil-in-water emulsion composition comprising: (A) an organopolysiloxane having an average chemical composition represented by the general formula (1); (B) silica particles; and (C) water, R1 aSiO(4 - a) / 2 (1) in the formula (1), -R1s in a molecule may be the same or different, each R1 is a group selected from a substituted or unsubstituted, saturated or unsaturated monovalent hydrocarbon group having 1 to 25 carbon atoms, a substituted or unsubstituted aromatic group having 6 to 30 carbon atoms, a hydroxyl group, an alkoxy group having 1 to 6 carbon atoms, and a hydrogen atom, and -a is 1.5 to 2.5.

Description

technical field [0001] The present invention relates to an oil-in-water emulsion composition for a die-casting release agent, the composition comprising an organopolysiloxane as an oil component. Background technique [0002] In the die casting of non-ferrous metal products such as aluminum, zinc and magnesium, mold release agents have been used to improve release properties, for example, by avoiding sticking of molten metal and reducing friction when removing from the mold. In such release agents for die-casting molds, organopolysiloxanes are known as main components for imparting release properties. It is also known that such organopolysiloxanes are used in oil-in-water emulsion compositions for environmental and safety reasons, since for example there is less risk of fuming and fire. [0003] For example, Patent Document 1 proposes that dimethylpolysiloxane having a specific structure modified with long-chain alkyl groups and aralkyl groups, respectively, be dispersed in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04B01F17/00B01F17/54C09K23/00C09K23/54
CPCC08L83/04C08G77/80C09K23/002C09K23/54C08K3/36C08K9/06B22D17/2007B22D17/2038C10N2040/36C08J3/03
Inventor 仙石爱利荒木伸一
Owner WACKER CHEM GMBH
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