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Method for preparing adhesive material for aqueous paint

A technology for bonding materials and water-based coatings, applied in starch coatings, starch derivative coatings, coatings, etc., can solve the problems of reduced water resistance, reduced adhesive strength, reduced operability, etc., and achieves excellent water resistance, excellent adhesion The effect of bonding strength and stable dispersion

Active Publication Date: 2013-03-13
DAESANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, problems such as reduced handling due to the high viscosity phenomenon of starch, reduced adhesive strength compared to conventional synthetic acrylic emulsions, and especially reduced water resistance due to the hydrophilic nature of starch, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The invention provides a method for preparing an adhesive material for water-based paint, which comprises the following steps: (a) adding an acrylic or methacrylic monomer (hereinafter referred to as the first monomer) to the water-based starch gelatinization solution and a polymerization initiator to carry out polymerization to form a nucleus for copolymerization of starch and monomer; and (b) in the reactant obtained in step (a), add a compound selected from styrene, propylene, acrylate, methacrylate, propylene More than one monomer in nitrile and ethylene (hereinafter referred to as the second monomer) and a polymerization initiator are polymerized, and then the second monomer is polymerized on the core to form a copolymer containing a core-shell structure lotion.

[0026] In the preparation method of the present invention, the "starch" includes all forms of starch, including native starch usually derived from plants, physically or chemically modified starch, and the...

Embodiment 1

[0050] Embodiment 1. preparation contains the emulsion of the copolymer of core-shell structure

[0051] (1) Preparation of water-based starch gelatinization solution

[0052] 90.6 g of starch (DS-SyncSTA S100, Daesang Co., Ltd., Korea) was added to 178.0 g of ion-exchanged water for dispersion, and the pH value was adjusted to 6 using 7% HCl. 1.2 g of amylolytic enzyme liquid prepared by the following method was added to this reactant. Dilute 1 g of heat-resistant α-amylase (Liquozymesupra, Novozymes, Denmark) in 99 g of ion-exchanged water to prepare 1.2 g of amylolytic enzyme solution. Then, the obtained reactant was put into the reaction tank of the 4 neck flask of 1 L capacity, and it stirred at 90 degreeC for 2 hours. After adding 0.6 g of hypochlorous acid to the reactant to inhibit the enzyme activity, it was cooled to 80° C. to obtain a water-based starch gelatinization solution.

[0053] (2) Preparation of starch-like cores

[0054] Add 6.4g of reactive emulsifie...

Embodiment 2

[0060] Example 2. Preparation of an emulsion containing a copolymer with a core-shell structure

[0061] In addition to using 6.5g of SR-10 (Adeka, Japan) as a reactive emulsifier in (2) of Example 1, the other methods were the same as in Example 1 to obtain an emulsion form of water-based paint. Material.

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Abstract

The present invention provides a method for preparing an emulsion type adhesive material for an aqueous paint, containing a core-shell structured copolymer having a dual layer with a core comprising a starch-based copolymer, a natural polymer, and a shell comprising a hydrophobic polymer. The adhesive material for an aqueous pain obtained through the preparation method of the present invention has particularly excellent water-resisting qualities, film characteristics, and viscosity characteristics.

Description

technical field [0001] The present invention relates to a method for preparing an adhesive material for water-based paint, and in more detail, relates to a method for preparing an adhesive material for water-based paint in the form of an emulsion. The adhesive material for water-based paint contains a double-layer core-shell Structured copolymer, the double layer is a core composed of a starch copolymer of a natural high molecular polymer and a shell composed of a hydrophobic high molecular polymer. The adhesive material for water-based paint prepared according to the preparation method of the present invention has particularly excellent water resistance, coating film characteristics and viscosity characteristics. Background technique [0002] Considering that modern people spend more than 80% of their day indoors, it is very important to ensure a comfortable and healthy indoor air quality. At present, in the ordinary apartment houses we live in, due to insufficient ventila...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D103/02C09D133/04C09J103/02C09J133/04
CPCC09D133/04C08F251/02C09D103/04C08F285/00C12P19/14C09J151/00C08L2207/53
Inventor 韩旻咸忠炫全映承
Owner DAESANG
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