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Aqueous emulsion and coating

A water-based emulsion and coating technology, applied in coatings, latex paints, etc., can solve the problem of undisclosed technical significance of using a specific amount of surfactant, and achieve the effects of excellent pigment mixing, film transparency and solvent resistance.

Active Publication Date: 2008-02-27
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It also describes the combined use of surfactants, but there are no specific examples of surfactants, and the use of surfactants in a specific amount and its technical significance are completely undisclosed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] 750 g of ion-exchanged water, 24 g of PVA-1, and 16 g of polyoxyethylene lauryl ether [Daiichi Kogyo Pharmaceutical Co., Ltd. Prepare DKS NL-250 (active ingredient concentration 100%)] and dissolve completely at 95°C. After cooling to 60° C., 266 g of methyl methacrylate and 266 g of butyl acrylate were added, and nitrogen substitution was carried out while stirring at 120 rpm. Then 0.0058 g of ferrous chloride, 25 g of a 10% aqueous solution of L(+) sodium tartrate (TAS) was added. Next, a 0.5% aqueous solution of 100 g of hydrogen peroxide (HPO) was added over 3 hours to carry out emulsion polymerization. After the addition of the aqueous hydrogen peroxide solution was terminated, the mixture was aged for 1 hour to complete the polymerization reaction, and an emulsion with a solid content of 39.8% was obtained.

Embodiment 2

[0096] Polymerization was carried out in the same manner as in Example 1 except that PVA-2 (polymerization degree 1700, saponification degree 98% mol, 1,2-diol bond amount 2.2% mol) was used instead of PVA-1, and a solid content of 39.7 % of emulsion.

Embodiment 3

[0098] Polymerization was carried out in the same manner as in Example 1 except that PVA-4 (polymerization degree 1000, saponification degree 88% mol, 1,2-diol bond amount 2.5% mol, ethylene content 4.0% mol) was used instead of PVA-1 , to obtain an emulsion with a solid content of 39.9%.

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Abstract

To provide an aqueous emulsion having excellent mechanical stability, pigment compatibility and, when formed into a film, capable of providing excellent film transparency and solvent resistance; and a coating prepared using the aqueous emulsion. [MEANS FOR SOLVING PROBLEMS] An aqueous emulsion comprising: a polymer comprising at least one monomer unit selected from the group consisting of a (meth)acrylate ester monomer unit, a styrene monomer unit and a diene monomer unit as a dispersoid; and (A) a vinyl alcohol polymer having 1.9 mol% or more of a 1,2-glycol bond and a saponification degree of 70 mol% or higher and (B) a surfactant as dispersants, the ratio of (A) / (B) being 50 / 50 to 95 / 5 by weight and the average particle diameter of the particles dispersed in the emulsion being 0.5 [mu]m or smaller. A coating prepared using the aqueous emulsion.

Description

technical field [0001] This invention relates to aqueous emulsions and coatings. More specifically, the present invention relates to a polymer having at least one monomer unit selected from (meth)acrylate monomer units, styrene monomer units, and diene monomer units as a dispersion. An aqueous emulsion, the emulsion is a vinyl alcohol polymer (A) having a 1.9% mole or more 1,2-diol bond and a saponification degree of 70% mole or more and a surfactant (B) as a dispersant, (A) / (B) an aqueous emulsion with a weight ratio of 50 / 50-95 / 5, an average particle diameter of dispersed particles of 0.5 μm or less, excellent mechanical stability, film transparency, pigment mixing and solvent resistance; and using the Water-based emulsion coatings. Background technique [0002] In the past, in order to protect and decorate the wall surface of buildings, etc., the exterior decoration materials mainly used dry exterior decoration materials such as decorative galvanized steel, printed ply...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/06C08F2/24C08L25/10C08L29/04C09D5/02C09D7/12C09D125/10C09D129/04C09D133/06
CPCC08L29/04C09D133/06C08F2/24C09D5/02C09D129/04C08L33/06C08L2666/04C08L25/10
Inventor 真木秀树谷本征司仲前昌人
Owner KURARAY CO LTD
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