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Storable release agent and preparation method thereof

A release agent and storage-resistant technology, applied in chemical instruments and methods, other household appliances, tires, etc., can solve problems such as failure to meet the requirements of use, uneven performance of the isolation film, sinking, etc., to achieve excellent performance, reduce Possibility of delamination, effect of good stability

Inactive Publication Date: 2020-09-04
余姚市远东化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned prior art scheme has the following defects: the silicone release agent in the above-mentioned published patent is of emulsion type. The large phase will have a tendency to sink, which wil

Method used

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  • Storable release agent and preparation method thereof
  • Storable release agent and preparation method thereof

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Embodiment 1

[0048] The invention discloses a storage-resistant release agent, which is prepared from the following proportioning components: polycarbosilane 80g; nanometer montmorillonite 13g; organic silicon defoamer 5g; thickener 6g; emulsifier 4g; 200g of ionized water. Among them, the mass ratio of octamethylcyclotetrasiloxane, polymethylphenylsiloxane and methyltrifluoropropylsiloxane in polycarbosilane is 1:1.5:2; polypropylene in thickener The mass proportion of amide and carboxyethyl cellulose is 1.5:0.8; the mass proportion of sodium dodecylbenzenesulfonate and p-octylphenol polyoxyethylene ether in the emulsifier is 2.4:1.3.

[0049] The storage-resistant release agent of the present invention is prepared by the following method:

[0050] S1. Premix and emulsify polycarbosilane, silicone defoamer, thickener, and emulsifier at 60°C according to the dosage to obtain a first-grade mixture;

[0051] S2. Add deionized water dropwise to the primary mixture within 30 minutes, and sti...

Embodiment 8

[0056] The difference between embodiment eight and embodiment six is ​​that the mass ratio of octamethylcyclotetrasiloxane, polymethylphenylsiloxane and methyltrifluoropropylsiloxane in polycarbosilane is 1: 2:1.

Embodiment 9

[0057] The difference between embodiment nine and embodiment six is ​​that the mass ratio of octamethylcyclotetrasiloxane, polymethylphenylsiloxane and methyltrifluoropropylsiloxane in polycarbosilane is 2: 3:2.

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Abstract

The invention relates to a storable release agent, and relates to the technical field of release agents. The storable release agent comprises 80 parts-96 parts of polycarbosilane, 13 parts-17 parts ofnano-montmorillonite, 5 parts-8 parts of an organic silicon defoaming agent, 4 parts-6 parts of a thickening agent, 4 parts-7 parts of an emulsifying agent, and 200 parts-270 parts of deionized water. The release agent has excellent storage stability. A preparation method of the storable release agent is also disclosed. The method comprises the following steps of S1, premixing and emulsifying thepolycarbosilane, the organic silicon defoaming agent, the thickening agent and the emulsifying agent at 20 DEG C-60 DEG C according to the proportion to obtain a primary mixture; S2, dropwise addingthe deionized water into the primary mixture within 25 min-30 min, and carrying out stirring while dropwise adding at a stirring speed of 1200 r/min-1600 r/min so as to obtain a secondary mixture; andS3, adding the nano-montmorillonite into the secondary mixture, and carrying out stirring for 15 min-20 min so as to obtain the storable release agent. According to the method, all the components canbe uniformly mixed, so that the storage stability of the release agent is effectively ensured.

Description

technical field [0001] The invention relates to the technical field of release agents, in particular to a storage-resistant release agent and a preparation method thereof. Background technique [0002] Silicone release agent is currently the most widely used and used tire release agent. They have the advantages of less coating, good surface performance of parts, and no corrosion of molds. However, the existing silicone tire release agent still has some disadvantages, such as not good enough temperature resistance, resulting in some relatively dirty yellow substances remaining on the rubber tire products, which seriously affects the product quality. Polycarbosilane is a kind of organosilicon polymer compound. Its main chain is generally composed of silicon and carbon atoms alternately. The silicon and carbon atoms are connected with hydrogen or organic groups. They are resistant to high temperature, corrosion and wear. In addition to these advantages of polycarbosilane, hype...

Claims

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Application Information

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IPC IPC(8): B29C33/62B01D19/02B01F13/06B29L30/00
CPCB29C33/62B01D19/02B29L2030/00B01F33/70
Inventor 施少卿
Owner 余姚市远东化工有限公司