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A kind of preparation method of nano-calcium carbonate for water-resistant polyurethane glue

A technology of nano-calcium carbonate and polyurethane glue, which is applied in polyurea/polyurethane adhesives, chemical instruments and methods, adhesives, etc., can solve the problem that nano-calcium carbonate cannot meet the needs of filling high-quality polyurethane sealant, and achieve a feasible process , good heat resistance, and the effect of enhancing compatibility

Active Publication Date: 2018-06-05
GUANGXI HUANA NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current production of nano-calcium carbonate cannot meet the needs of filling high-quality polyurethane sealant

Method used

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  • A kind of preparation method of nano-calcium carbonate for water-resistant polyurethane glue
  • A kind of preparation method of nano-calcium carbonate for water-resistant polyurethane glue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of preparation method of nano-calcium carbonate for water-resistant polyurethane glue, comprises the following steps:

[0029] (1) pH = 6.8, specific surface area 20.5m 2 / g, the nano-calcium carbonate suspension of 10% mass concentration is passed into steam, heated to 75°C, and the polysiloxane methacrylate saponification solution of 3.0% calcium carbonate dry weight is added, and the speed is 1500r / min Under stirring for 30 minutes to carry out the first surface modification to obtain a modified nano-calcium carbonate slurry. The preparation method of the polysiloxane-based methacrylate saponification solution is as follows: the polysiloxane-based methacrylate and the saponification agent are mixed and reacted, the saponification temperature is controlled to be 80°C, the saponification time is 30min, the saponification agent sodium hydroxide The dosage is 17% by weight of polysiloxane-based methacrylate and the concentration of saponified solution is 8%.

[...

Embodiment 2

[0034] A kind of preparation method of nano-calcium carbonate for water-resistant polyurethane glue, comprises the following steps:

[0035] (1) pH = 6.8, specific surface area 25.6m 2 / g, the nano-calcium carbonate suspension of 15% mass concentration is passed into steam, heated to 80°C, and the polysiloxane-based methacrylate saponification solution of 2.5% calcium carbonate dry weight is added, and the speed is 1000r / min Under stirring for 25 minutes, the first surface modification was carried out to obtain a modified nano-calcium carbonate slurry. The preparation method of the polysiloxane-based methacrylate saponification liquid is as follows: the polysiloxane-based methacrylate and a saponification agent are mixed and reacted, the saponification temperature is controlled to be 90° C., the saponification time is 30 minutes, and the saponification agent sodium hydroxide The dosage is 14% by weight of polysiloxane-based methacrylate and the concentration of saponified sol...

Embodiment 3

[0040] A kind of preparation method of nano-calcium carbonate for water-resistant polyurethane glue, comprises the following steps:

[0041] (1) pH = 7.2, specific surface area 29.8m 2 / g, the nano-calcium carbonate suspension of mass concentration 20% passes steam, is heated to 85 ℃, adds the polydisiloxane base methacrylate saponification liquid that is 3.5% of calcium carbonate dry basis weight, at a rate of 1500r / Stirring for 20 minutes under 1 min for the first surface modification to obtain a modified nano-calcium carbonate slurry. The preparation method of the polydisiloxane methacrylate saponification solution is as follows: mix and react the polydisiloxane methacrylate and a saponification agent, control the saponification temperature to 80°C, saponification time 20min, saponification agent hydrogen The consumption of potassium oxide is 10% by weight of polydisiloxane-based methacrylate and the concentration of saponified solution is 9%.

[0042] (2) Vacuum dehydrat...

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Abstract

The invention discloses a preparation method for nanometer calcium carbonate used for a water-resistant polyurethane sealant. The preparation method comprises the following steps: heating a nanometer calcium carbonate suspension to 75 to 95 DEG C, adding polysiloxane-based acrylate saponification liquid, and carrying out stirring for 20 to 30 min for primary surface modification so as to obtain modified nanometer calcium carbonate slurry; carrying out vacuum dehydration and drying, controlling the water content of powder to be no more than 0.3% and then carrying out crushing so as to obtain a primary nanometer calcium carbonate product; adding the primary nanometer calcium carbonate product into a mixer, carrying out heating and stirring, then adding a composite modifier composed of dimethicone and a Si747 silane coupling agent at 80 to 90 DEG C for secondary surface modification, stopping stirring when the temperature of a material rises to 100 to 110 DEG C and carrying out discharging so as to obtain modified nanometer calcium carbonate; and carrying out crushing and sieving so as to obtain nanometer calcium carbonate used for the water-resistant polyurethane adhesive.

Description

technical field [0001] The invention relates to the field of inorganic materials, in particular to a preparation method of nano-calcium carbonate for water-resistant polyurethane glue. Background technique [0002] Nano-calcium carbonate is a very important new functional nano-scale filler with excellent performance in industrial calcium carbonate. It can not only increase the filling capacity and reduce the cost, but also improve the surface color of the filled product and improve the comprehensive mechanical properties of the product. Performance, widely used in plastics, rubber, coatings, adhesives, inks and other fields. In the polyurethane sealant processing industry, nano-calcium carbonate has become an indispensable and important filler, which mainly plays a reinforcing role, and at the same time endows the sealant with excellent thixotropy. Polyurethane sealants have excellent performance, but because of the strong polar carbamate groups in the main chain, they are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J11/04C09J175/04C08K9/06C08K9/04C08K3/26C09C1/02C09C3/10C09C3/12
CPCC08K3/26C08K9/06C08K9/08C08K2003/265C08K2201/006C08K2201/011C09C1/021C09C3/006C09J11/04C09J175/04
Inventor 陈霞朱勇覃玲意周金炼阮国彬陆初典
Owner GUANGXI HUANA NEW MATERIALS TECH CO LTD