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Preparation of nano-calcium carbonate for PVC weld seam adhesive

A nano calcium carbonate and calcium carbonate technology, applied in the direction of adhesives, fibrous fillers, adhesive additives, etc., can solve the problems of poor reinforcement of PVC welding seam glue, reducing the use temperature of PVC welding seam glue, sagging, etc. Poor reinforcement and sag, low cost and uniform appearance

Active Publication Date: 2018-12-04
ANHUI PROVINCE XUNCHENG CITY HUANA NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the modified nano-calcium carbonate obtained by the present invention is filled with PVC weld glue, it not only solves the problems of poor reinforcement and sagging of PVC weld glue, but also can significantly reduce the use temperature of PVC weld glue

Method used

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  • Preparation of nano-calcium carbonate for PVC weld seam adhesive
  • Preparation of nano-calcium carbonate for PVC weld seam adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method of nano-calcium carbonate for PVC welding seam glue, comprising the steps of:

[0040] (1) The specific gravity of the refined milk of lime is adjusted to 1.065, and a metal salt compound crystal form control agent of 0.5% of calcium carbonate dry basis mass is added, and the metal salt compound is composed of BaSO4 and ZnSO4 with a mass ratio of 1:1 composition, and then introduced into a bubbling carbonation reaction kettle, adjusted the temperature of the milk of lime to 25°C, and introduced a mixed gas with a carbon dioxide concentration of 33% for carbonation reaction, and when the pH value of the slurry dropped to 7.5, the reaction was stopped to obtain nanometer calcium carbonate suspension;

[0041] (2) Nano-calcium carbonate suspension is heated to 75 DEG C, then add the composite surface treatment agent that is 3.2% of calcium carbonate dry basis mass, finish surface modification after stirring 60min, obtain modified calcium carbonate susp...

Embodiment 2

[0044] A preparation method of nano-calcium carbonate for PVC welding seam glue, comprising the steps of:

[0045] (1) The specific gravity of the refined milk of lime is adjusted to 1.080, and a metal salt compound crystal form control agent of 1% of calcium carbonate dry basis mass is added, and the metal salt compound is composed of BaSO4 and ZnSO4 with a mass ratio of 2:1 composition, and then introduced into the bubbling carbonation reactor, adjusted the temperature of the milk of lime to 26°C, and introduced a mixed gas with a carbon dioxide concentration of 30% to carry out the carbonation reaction. When the pH value of the slurry dropped to 7.5, the reaction was stopped to obtain nanometer calcium carbonate suspension;

[0046] (2) Nano-calcium carbonate suspension is heated to 80 ℃, then add the composite surface treatment agent that is 3.4% of calcium carbonate dry basis mass, finish surface modification after stirring 45min, obtain modified calcium carbonate suspensio...

Embodiment 3

[0049] A preparation method of nano-calcium carbonate for PVC welding seam glue, comprising the steps of:

[0050] (1) The specific gravity of the refined milk of lime is adjusted to 1.075, and a metal salt compound crystal form control agent of 0.5% of calcium carbonate dry basis mass is added, and the metal salt compound is composed of BaSO4 and ZnSO4 with a mass ratio of 3:2 composition, and then introduced into a bubbling carbonation reaction kettle, adjusted the temperature of the milk of lime to 28°C, and introduced a mixed gas with a carbon dioxide concentration of 33% for carbonation reaction, and when the pH value of the slurry dropped to 7.5, the reaction was stopped to obtain nanometer calcium carbonate suspension;

[0051] (2) Nano-calcium carbonate suspension is heated to 85 ℃, then add the composite surface treatment agent that is 3.5% of calcium carbonate dry basis mass, finish surface modification after stirring for 30min, obtain modified calcium carbonate susp...

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Abstract

The invention discloses a preparation method of nano-calcium carbonate for a PVC weld seam adhesive. The method includes: adjusting the proportion of lime milk to 1.060-1.080, adding a metal salt compound crystal form control agent, mixing the substances evenly, then introducing the mixture into a bubbling carbonation reaction kettle, introducing a mixed gas containing carbon dioxide for carbonation reaction, lowering the PH value of slurry to 7.5, and stopping the reaction, thus obtaining a nano-calcium carbonate suspension; heating the suspension to 75-85DEG C, then adding a compound surfacetreatment agent, conducting stirring for 30-60min to complete surface modification, thus obtaining a modified calcium carbonate suspension, wherein the compound surface treatment agent is formed by compounding of higher sodium aliphatate, diethylenetriamine and an epoxy resin modified styrene-acrylic emulsion; and then carrying out filter pressing dehydration, drying and crushing, thus obtainingthe nano-calcium carbonate for a PVC weld seam adhesive sealant. The nano-calcium carbonate filled PVC weld seam adhesive obtained by modification in the invention can improve the mechanical properties of the sealant and effectively reduce the use temperature of the sealant, and has broad market prospects.

Description

technical field [0001] The invention relates to the technical field of modification of nanometer materials, in particular to the preparation of nanometer calcium carbonate for PVC weld glue. Background technique [0002] PVC automotive weld seam sealant is a kind of plastisol type sealant with high solid content made of PVC resin as the main component. Because it has multiple uses such as sealing, anti-corrosion, shock absorption, etc., and it is low in cost and convenient in construction, it has been widely used abroad, especially in the automobile industry in the United States, Japan and Western European countries. The development of such products in China started relatively late, and some performances of the products are not stable, especially the construction performance, which has a big gap with foreign products, which limits the promotion of PVC sealant in the domestic automobile industry. [0003] 1. Good mechanical properties [0004] When different types of calciu...

Claims

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Application Information

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IPC IPC(8): C09C1/02C09C3/06C09C3/08C09C3/10C09J127/06C09J11/04C09J11/06C09J11/08
CPCC08K2003/2296C08K2003/265C08K2201/011C08L2205/025C08L2205/03C09C1/022C09C3/006C09C3/06C09C3/08C09C3/10C09J11/04C09J11/06C09J11/08C09J127/06C08L27/06C08L75/04C08K13/06C08K9/08C08K9/04C08K3/26C08K3/22C08K5/12
Inventor 蓝擎朱勇刘卢科陈大好
Owner ANHUI PROVINCE XUNCHENG CITY HUANA NEW MATERIAL TECH CO LTD