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A kind of nano calcium carbonate emulsion and preparation method thereof

A nano-calcium carbonate and emulsion technology, which is applied in the field of rubber additives, can solve the problems of poor improvement of metal mold surface defects, affecting the storage period of emulsion and transportation costs, and affecting the separation of raw materials and metal molds, achieving excellent results and protecting molds Effect of reduction of surface and surface defects

Active Publication Date: 2020-08-28
HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventor has developed a nano-calcium carbonate modified "rubber tire isolation release agent" (rubber tire isolation release agent and Its preparation method, ZL 201210298099.9), has a good effect, but the invention adopts a step-by-step method, first preparing nano-calcium carbonate emulsion and film-forming substance emulsion with narrow particle size distribution (40-60nm), and then mixing them in proportion The finished emulsion is prepared by reaction, but the emulsion with high solid content cannot be obtained, which affects the storage period and transportation cost of the emulsion. In addition, it does not improve the surface defects of the metal mold well, which affects the smooth separation of the raw materials and the metal mold in the later stage, and the steps are cumbersome and costly. time consuming

Method used

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  • A kind of nano calcium carbonate emulsion and preparation method thereof
  • A kind of nano calcium carbonate emulsion and preparation method thereof
  • A kind of nano calcium carbonate emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 45 parts of silicone oil with an average viscosity of 1000cp, emulsifier: 20 parts of TX-100, measure 10 parts of deionized water, weigh 5 parts of stearic acid, 10 parts of ethylene glycol, and 3 parts of calcium chloride for deionized The water is prepared into a calcium chloride aqueous solution with a concentration of 2.5M, which is added into a reactor with a stirring reflux device, and stirred at 30°C-45°C to form a transparent solution. Slowly add sodium carbonate powder or 2.5M aqueous sodium carbonate solution into the above silicone oil-calcium chloride solution under stirring. The molar ratio of calcium ions to carbonate ions is 1:1. After the addition is complete, the system is heated to 45-55°C. Stir and reflux for 28h-30h, stop heating, add the remaining amount of deionized water, stir slowly, cool down and invert the phase to obtain a silicone oil nano-calcium carbonate emulsion with a solid content of about 45% high temperature resistant isolation m...

Embodiment 2

[0020] Weigh 35 parts of silicone oil with an average viscosity of 2000cp, pipette 2 parts of TX-100, 1 part of OP-10, 1 part of AEO3 for emulsifier, measure 5 parts of deionized water, weigh 0.5 part of glycerin, 0.5 part of polyethylene glycol Alcohol 500, 0.1 part of calcium chloride is prepared with deionized water to make a calcium chloride aqueous solution with a concentration of 0.5M, put it into a reactor with a stirring reflux device, and stir at 30°C-45°C to form a transparent solution. Sodium carbonate was prepared with deionized water to make a sodium carbonate aqueous solution with a concentration of 0.5M, and slowly added to the above silicone oil-calcium chloride solution under stirring. The molar ratio of calcium ions to carbonate ions was 1:1. After the addition was complete, the system Raise the temperature to 55-65°C, stir and reflux for 24-26 hours, stop heating, add the remaining deionized water, stir slowly, cool down and invert the phase, and obtain a sil...

Embodiment 3

[0022] Weigh 20 parts of silicone oil with an average viscosity of 2000cp, 20 parts of silicone oil with an average viscosity of 1000cp, 3 parts of TX-100, 1 part of OP-4, 6 parts of AEO3, 10 parts of deionized water, and 2.5 parts of emulsifier Ethylene glycol, 5 parts of oleic acid, and 1.5 parts of calcium chloride are prepared with deionized water to make a calcium chloride aqueous solution with a concentration of 2M, put it into a reactor with a stirring reflux device, and stir at 30°C-45°C to form a transparent solution . Sodium carbonate was prepared with deionized water into a sodium carbonate aqueous solution with a concentration of 1.5M, and slowly added to the above-mentioned silicone oil-calcium chloride solution under stirring. The molar ratio of calcium ions to carbonate ions was 1:1. After the addition was complete, the system Raise the temperature to 65-75°C, stir and reflux for 20h-24h, stop heating, add the remaining deionized water, stir slowly, cool down an...

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Abstract

The invention discloses a nano calcium carbonate emulsion and a preparation method thereof and belongs to the field of rubber auxiliaries. The nano calcium carbonate emulsion is prepared through the following method that firstly, silicon oil, a silicon oil emulsifying agent, water-soluble salt calcium chloride and sodium carbonate serve as main raw materials to prepare a W / O type active nano calcium carbonate silicon oil composite emulsion; and then water is added for phase inversion so that an O / W type silicon oil nano calcium carbonate emulsion can be obtained. The nano calcium carbonate emulsion is suitable for isolation between raw materials and a mold in the production process of rubber products, can make the surface of the mold cleaned easily, can repair micro pits and damage on thesurface of the mold, prolongs the service life of the mold, makes surface defects of products reduced, and increases the finished product rate.

Description

technical field [0001] The invention relates to an isolation release agent for rubber products, in particular to a nanometer calcium carbonate emulsion and a preparation method thereof, belonging to the field of rubber additives. Background technique [0002] As an important auxiliary agent in the processing of rubber products, the release agent can improve the appearance and performance of the product and improve the quality of the product. Commonly used release agents include waxes, silicone oils, soaps, etc., each with its own characteristics; while the commonly used release agents are mainly inorganic powders such as talcum powder, etc., there are fatal defects of dust pollution and whitening of the product during use ; and when the operating environment temperature reaches about 100°C-150°C, some commonly used release agents are prone to scorch, and the residual scale affects the appearance of the product, and the mold is not suitable for cleaning. Therefore, it is urge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C33/60
CPCB29C33/60
Inventor 褚艳红郭辉庄玉伟张国宝邢会华曹艳霞刘清曹键
Owner HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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