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Method for preparing functional calcium carbonate by using modified coupling agent

A calcium carbonate and silane coupling agent technology, applied in chemical instruments and methods, dyeing organosilicon compound treatment, inorganic pigment treatment, etc., can solve problems such as difficult to make up and insufficient modification, and achieve the effect of improving the modification effect

Inactive Publication Date: 2018-06-08
贺州市星辉科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commercialized surface treatment agents that are actually used in large quantities mainly include stearic acid, titanate coupling agents and aluminate coupling agents. Among them, silane coupling agents have excellent performance in modification, but generally in If the coupling agent is directly added to the calcium carbonate mixture, the modification will be insufficient, even if it is stirred at a high speed in the later stage, it will be difficult to make up for it

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Configuration of vinyl tris(2-methoxyethoxy)silane coupling agent:

[0029] Take 20% vinyl tris(2-methoxyethoxy)silane, 70% ethanol, and 10% water successively and put them into a bottle container, stir evenly, then add a certain amount of acetic acid to make the pH of the solution reach 4, and set aside;

[0030] Preparation of functional calcium carbonate: get 100g of 500-mesh calcium carbonate powder, add water and stir, configure 20% by mass percent calcium carbonate emulsion in water, add 1g of prepared vinyl tris(2- Methoxyethoxy) silane coupling agent, the propylene glycol monostearate coupling agent of 1g, the polymethylstyrene auxiliary agent of 2g, the dioctyl adipate plasticizer of 1g, stir, then will The temperature of the system is controlled at 50°C, stirred for 1 hour, then 1g of BASF UV-234 anti-aging agent is added, stirred at 60°C for 1 hour, dehydrated after the reaction, dried at 110°C, cooled to obtain functional carbonic acid calcium.

Embodiment 2

[0032] Configuration of vinyl tris(2-methoxyethoxy)silane coupling agent:

[0033] Take 25% vinyl tris(2-methoxyethoxy)silane, 65% ethanol, and 10% water successively and put them into a bottle container, stir evenly, then add a certain amount of acetic acid to make the pH of the solution reach 4, and set aside;

[0034] Preparation of functional calcium carbonate:

[0035] Get the 600 mesh calcium carbonate powder of 10kg, add water and stir, be configured into 25% calcium carbonate water-emulsion solution by mass percentage, in calcium carbonate water-emulsion solution, add the prepared vinyl tris (2-methoxyethoxy) of 0.2kg Silane coupling agent, the propylene glycol monostearate coupling agent of 0.2kg, the polymethylstyrene auxiliary agent of 0.3kg, the dioctyl adipate plasticizer of 0.2kg, stir, then system temperature is heated Control at 55°C, stir for 1.5h, then add 0.2kg of BASF UV-234 anti-aging agent, stir at 65°C for 1.5h, dehydrate after finishing, dry at 112°C, ...

Embodiment 3

[0037] Configuration of vinyl tris(2-methoxyethoxy)silane coupling agent:

[0038] Take 30% vinyl tris (2-methoxyethoxy) silane, 60% ethanol, and 10% water in turn and put them into a bottle container, stir evenly, then add a certain amount of acetic acid to make the pH of the solution reach 5, and set aside;

[0039] Preparation of functional calcium carbonate:

[0040] Pour 100kg of 800-mesh calcium carbonate powder into a heating mixer, add water and stir evenly, and configure a 30% calcium carbonate aqueous emulsion solution by mass percentage, in the calcium carbonate aqueous emulsion solution, add 3kg of prepared vinyl tris(2 -methoxyethoxy) silane coupling agent, the propylene glycol monostearate coupling agent of 2kg, the polymethylstyrene auxiliary agent of 5kg, the dioctyl adipate plasticizer of 3kg, stir, then Control the temperature of the system at 60°C, stir for 2 hours, add 3kg of BASF UV-234 anti-aging agent, stir at 70°C for 2 hours, dehydrate after the react...

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PUM

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Abstract

The invention discloses a method for preparing functional calcium carbonate by using a modified coupling agent. The method comprises the steps of: first mixing calcium carbonate powder and water at acertain proportion, performing stirring to obtain a uniform calcium carbonate mixed solution, then adding a vinyl tri-(2-methoxyethoxy)silane coupling agent solution, a propylene glycol monostearate coupling agent, a polymethyl styrene additive and dioctyl adipate plasticizer into the mixed solution, performing heating so as to raising the temperature, conducting even stirring, then adding an anti-aging agent, and finally performing dehydration, drying, cooling and other operating procedures to obtain the product. When the vinyl tri-(2-methoxyethoxy) silane coupling agent is added, the vinyl tri-(2-methoxyethoxy) silane coupling agent is first prepared into an alcohol solution, and then the obtained alcohol solution is added into the calcium carbonate mixed system, so that full contact with calcium carbonate is achieved, and the modification effect is improved; in addition, good impact strength and tensile strength can be achieved when the prepared calcium carbonate powder is added into resin.

Description

technical field [0001] The invention belongs to the technical field of calcium carbonate preparation, and in particular relates to a method for preparing functional calcium carbonate by using a modified coupling agent. Background technique [0002] Calcium carbonate is an important functional inorganic filler, which has the advantages of low price, abundant reserves, stable performance, easy processing, and non-toxicity. With the rapid development of composite materials and the worldwide energy shortage, the price of synthetic resins based on petroleum continues to rise, requiring people to add more inorganic fillers to composite products such as plastics and rubber to further reduce product costs. To save the amount of resin, and to ensure or improve the processing performance and physical and mechanical properties of the product while adding more inorganic fillers. [0003] For some plastic products, calcium carbonate can be used without surface treatment, such as soft PV...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/08C09C3/10C09C3/12
CPCC09C1/021C01P2006/22C09C3/006C09C3/08C09C3/10C09C3/12
Inventor 孙炜炜黄鹏腾
Owner 贺州市星辉科技有限公司