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Polyurethane modifier, preparation method thereof, and preparation method of nanometer calcium carbonate

A nano calcium carbonate, polyurethane technology, applied in the direction of calcium carbonate/strontium/barium, chemical instruments and methods, adhesives, etc., can solve the problems of high price, limited application scope of calcium carbonate surface modifier, etc., and achieve intermolecular force. Large, good storage stability, good particle dispersion effect

Inactive Publication Date: 2017-02-01
连州市万仕达新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is to overcome the defects that the existing calcium carbonate surface modifier is limited in scope of application and the price is relatively expensive, and to provide a preparation method of polyurethane modifier, which can be applied to the production of nanometer calcium carbonate. Surface treatment modification can also be used for modification of other powders

Method used

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  • Polyurethane modifier, preparation method thereof, and preparation method of nanometer calcium carbonate
  • Polyurethane modifier, preparation method thereof, and preparation method of nanometer calcium carbonate

Examples

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Effect test

Embodiment 1

[0030] Add 540kg of octadecyl alcohol into a stainless steel reaction kettle with a stirrer, raise the temperature to 90°C, the fatty alcohol is in a molten state, add 174kg of polyurethane toluene diisocyanate (TDI), and seal the reaction kettle at the same time. Control the temperature to 90-100°C, control the reaction time to 3h, discharge the material, and cool to obtain the polyurethane coupling agent, which is ready for use;

[0031] The limestone is calcined with a steel mechanized shaft kiln, the ratio of limestone and anthracite is 10:1, the calcining temperature is controlled at 1000°C, and the calcining time is 12h. The calcined lime is sieved to remove coal slag and small lime powder, and the obtained high-quality block lime enters the rotary digester for lime digestion. The temperature of water for digesting lime is controlled at about 50°C, and the water consumption is 5 times of lime mass. The primary lime slurry contains some coarse slag, and the concentration...

Embodiment 2

[0035] Add 512kg of hexadecanyl alcohol into a stainless steel reaction kettle with a stirrer, raise the temperature to 100°C and the fatty alcohol is in a molten state, add 222kg of isophorone diisocyanate (IPDI), seal the three-necked bottle at the same time, and control the temperature at 100°C during the reaction. ~110°C, control the reaction time to 4h, discharge the material, cool to obtain the polyurethane coupling agent, and set aside.

[0036] The limestone is calcined with a steel mechanized shaft kiln, the ratio of limestone and anthracite is 10:0.95, the calcining temperature is controlled between 950°C and the calcining time is 15h. The calcined lime is sieved to remove coal slag and small lime powder, and the obtained high-quality block lime enters the rotary digester for lime digestion. The temperature of water for digesting lime is controlled at about 60°C, and the water consumption is 6 times of lime mass. The primary lime slurry contains some coarse slag, an...

Embodiment 3

[0040] The preparation of nano-calcium carbonate is the same as in Example (1), except that the surface treatment agent is added as sodium stearate, the added amount is 3% of the nano-calcium carbonate, and the oil absorption value is 32mL / 100g. Company, model: SSA-4200, nitrogen adsorption method, measured BET specific surface area is 24.40m 2 / g.

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Abstract

The invention discloses a polyurethane coupling agent used for synthesizing polyurethane-containing groups and long-chain fatty alcohols. The main chain of the polyurethane coupling agent contains a carbamate group, an isocyanate group and long-carbon chain fatty acid, has the characteristics of possessing of the large polarity of an ester group and an isocyanate group, high cohesive energy, large intermolecular action force, high activity and polarity, excellent chemical bonding force with nanometer calcium carbonate, possessing of the flexibility and the elasticity of the long-chain fatty acid, and increase of the nanometer calcium carbonate filler and substrate silicone adhesive resin interface combination force. Compared with common fatty acid surface-treated calcium carbonate surface, nanometer calcium carbonate treated with the polyurethane modifier has the advantages of increase of the tensile strength, the elongation at break and the elastic modulus, good mechanical performances and wide application prospect when applied to plastics, rubbers and sealants.

Description

technical field [0001] The invention relates to a polyurethane modifier, a preparation method thereof and a method for preparing nanometer calcium carbonate. Background technique [0002] The surface modification of nano-calcium carbonate is mainly achieved by the adsorption, reaction, coating, or film formation of the modifier on the surface of calcium carbonate. Therefore, the surface modification and surface treatment of calcium carbonate by surface modifiers have a decisive role. It acts as a "bridge" between calcium carbonate particles and the matrix and other components in the material. [0003] The surface treatment of nano-calcium carbonate often has its specific application background or application field. Therefore, the selection of surface modifiers must consider the application objects of the treated materials. For example, the calcium carbonate filler surface modifier used in polymer-based composite materials, plastics and rubbers must not only be able to ads...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/75C08G18/30C09C1/02C09C3/10C01F11/18C08K9/10C08K3/26C09J183/04C09J11/04
CPCY02P20/129C08G18/7614C01F11/182C01F11/183C01P2006/12C01P2006/82C08G18/2825C08G18/755C08K3/26C08K9/10C08K2003/265C08K2201/011C09C1/021C09C3/10C09J11/04C09J183/04
Inventor 黄立贤杨晓华梁用全
Owner 连州市万仕达新材料有限公司
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