Cross-linked polyethyleneimine-modified calcium carbonate powder for waterborne paint and preparation method thereof

A technology of polyethyleneimine and calcium carbonate powder, which is applied in the direction of chemical instruments and methods, coatings, fibrous fillers, etc., can solve the problems of insufficient additional functions, achieve excellent filling modification, improve surface reactivity, and improve dispersion sexual effect

Inactive Publication Date: 2017-04-19
QINGYANG COUNTY YONGCHENG CALCIUM IND
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

"Research on Ground Calcium Carbonate Powder Modified by Stearic Acid-Titanate Coupling Agent" uses stearic acid and titanate coupling agent as composite modifier, absolute ethanol as dispersant, and adopts wet ball milling The powder is modified to achieve a relatively ideal modification effect, but the product prepared by this method is a hydrophobic product, which is limited in the application of water-based ink and water-based paint, and the additional functions are insufficient, which is limited to reinforcement For toughening, further modification is required to broaden its scope of use

Method used

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Embodiment Construction

[0011] A cross-linked polyethyleneimine modified calcium carbonate powder for water-based paint, the modified calcium carbonate powder is made of the following raw materials in parts by weight: calcium carbonate 50, polyethyleneimine 1, titanate coupling agent 2. Absolute ethanol 60, polyepichlorohydrin 0.4, N,N-dimethylformamide 60.

[0012] The preparation method of this embodiment powder comprises the following steps:

[0013] (1) Put the titanate coupling agent and calcium carbonate together into absolute ethanol, ball mill for 40 minutes, then dry with hot air to completely remove the solvent, and obtain pre-modified calcium carbonate powder after grinding and dispersing;

[0014] (2) Put polyethyleneimine and polyepichlorohydrin into N, N-dimethylformamide, stir until it is completely dissolved, then put in pre-modified calcium carbonate powder, and ultrasonically stir and mix for 40 minutes, then put the system Heating to 95°C, reacting for 3 hours, suction filtering a...

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Abstract

The invention discloses a cross-linked polyethyleneimine-modified calcium carbonate powder for waterborne paint. A preparation method for the modified calcium carbonate powder comprises the following steps: subjecting calcium carbonate to pretreatment via titanate coupling agent/ethanol solution wet-process ball milling so as to improve the dispersibility and surface reactivity of calcium carbonate; and allowing a polyethyleneimine film to grow on the surface of calcium carbonate in situ. The eventually prepared modified calcium carbonate powder has stable amphipathy, shows affinity to resin molecules in the system of the waterborne paint, can be dispersed in and coexist with solvents in the system of the waterborne paint, and is not prone to settlement, so excellent filling effect is obtained.

Description

technical field [0001] The invention relates to the technical field of inorganic powder surface modification, in particular to a cross-linked polyethyleneimine modified calcium carbonate powder for water-based paint and a preparation method thereof. Background technique [0002] Calcium carbonate is a very common inorganic powder filler. It has the advantages of low price, non-toxic and tasteless, high whiteness and good hardness. It is widely used in rubber products, papermaking, ink, plastics, coatings and other fields. However, , calcium carbonate is essentially an inorganic mineral, which has poor affinity and compatibility with organic substances. Direct filling will lead to serious deterioration of product performance and severely limited scope of use. Therefore, calcium carbonate powder needs to be adjusted in practical applications. Modified treatment. [0003] At present, the main modification methods include mechanical refinement, surface modifiers such as couplin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/12C09C1/02C09C3/10C09C3/08
CPCC08K3/26C08K9/04C08K9/10C08K2003/265C09C1/021C09C3/006C09C3/08C09C3/10C09D7/62
Inventor 陈永忠
Owner QINGYANG COUNTY YONGCHENG CALCIUM IND
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