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Polypropylene type aqueous dispersion, polypropylene type composite aqueous emulsion composition and its use

a technology of polypropylene and aqueous emulsion, applied in the direction of adhesive types, graft polymer adhesives, coatings, etc., can solve the problems of poor adhesion to paint or other resins, degraded working environment during production and use, and inability to achieve satisfactory dispersion stability endurable for practical us

Inactive Publication Date: 2005-06-09
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007] The present inventors have variously studied the above-mentioned problems, and have discovered that the above problems can be solved by providing a polyolefinic aqueous dispersion obtainable by emulsifying a propylenic polymer, a sur

Problems solved by technology

However, generally, since polyolefin does not have a polar group in a molecule, it is poor in adhesion to a paint or other resins.
However, most of conventional primers or paints contain an organic solvent or dissolved in an organic solvent, and therefore there were problems that they degraded working environments during production and using.
However, according to these conventional methods, there were problems that a satisfactory dispersion stability endurable for practical use could not be obtained since a particle size of dispersion particles in an aqueous dispersion was large, and smoothness of its coated film and adhesion to a polyolefin base material were lowered.

Method used

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  • Polypropylene type aqueous dispersion, polypropylene type composite aqueous emulsion composition and its use

Examples

Experimental program
Comparison scheme
Effect test

example 1

1. Preparation of Polypropylene

Preparation Example 1

(1) Preparation of dichloro[dimethylsilylene(cyclopentadienyl)(2,4-dimethyl-4H-1-azulenyl)]hafnium

(1)-1 Preparation of Ligand

[0251] After dissolving 2-methylazulene (4.01 g) in tetrahydrofuran (56 ml) and cooling in an ice bath at 0° C., 24.8 ml of a diethyl ether solution of methyl lithium (1.14 mol / l) was dropwise added thereto at the same temperature. After finishing the dropwise addition, the ice bath was taken out, and the resultant mixture was stirred for 2 hours. This solution was slowly dropwise added to a tetrahydrofuran solution (140 ml) of dimethylsilyl dichloride (34.0 ml, 0.280 mol) cooled to 0° C. by an ice bath. After finishing the dropwise addition, the ice bath was taken out, and the resultant mixture was stirred for 3 hours, and the solvent and unreacted dimethylsilyl dichloride were distilled off under a reduced pressure. Thereafter, tetrahydrofuran (80 ml) was added thereto, and the mixture was cooled to 0...

example 2

[0268] 300 g of polypropylene prepared in the above Preparation Example 1, 100 g of maleic anhydride and 900 g of chlorobenzene were placed in a glass flask equipped with a thermometer, a cooling tube, a stirrer and a dropping funnel, and it was dissolved in a nitrogen atmosphere by raising a temperature in the system to 130° C. Thereafter, a solution having 25 g of dicumyl peroxide dissolved in 300 g of chlorobenzene was dropwise added thereto at the same temperature for 5 hours, and aging reaction was carried out for 3 hours. After finishing the reaction, the reaction liquid was cooled to room temperature and was charged into 4.5 kg of acetone to precipitate a maleic anhydride-modified polypropylene which was then separated by filtration. The modified resin was introduced again into 4.5 kg of acetone to be purified, and was separated by filtration and was dried under vacuum. A white powder-like modified resin thus obtained was subjected to infrared ray absorption spectrum measurem...

example 3

1. Preparation of Polypropylene

Preparation Example 2

(1) Chemical Treatment of Clay Mineral

[0271] Desalted water (72 ml), lithium sulfate·1 hydrate (11.1 g) and sulfuric acid (17.1 g) were placed in a 1,000 ml round flask, and the content was dissolved under stirring. Commercially available granulated montmorillonite (Benclay SL manufactured by Mizusawa Industrial Chemicals, Ltd., 16.7 g) was dispersed in this solution, and the mixture was heated to 100° C. over 2 hours and was stirred at 100° C. for 5 hours. Thereafter, the mixture was cooled to room temperature over 1 hour, and a slurry obtained was filtrated to recover a wet cake. The cake thus recovered was slurried again with desalted water (500 ml) in a 1,000 ml round flask, and was filtrated. This operation was repeated twice. The cake finally obtained was dried under a reduced pressure at 200° C. for 1 hour to obtain chemically treated montmorillonite (15.0 g).

(2) Polymerization

[0272] To the chemically treated montmor...

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Abstract

A polypropylene type aqueous dispersion comprising the following components (a) to (c): (a) a polypropylene type polymer100parts by weightand / or a modified polypropylene typepolymer(b) a surfactant1 to 100parts by weight, and(c) water100 to 1,000parts by weight,wherein the component (a) has a main chain having the following features (1) and (2) and dispersion particles in the dispersion have an average particle size of at most 0.5 μm, Feature (1) when observing a peak derived from a carbon atom of a methyl group in a propylene unit chain part comprising a head-to-tail bond by 13C-NMR and fixing a chemical shift of a peak top at a peak attributable to pentad expressed by mmmm to 21.8 ppm, a ratio (S1 / S) of an area S1 of a peak of a peak top at 21.8 ppm to a total area S of peaks at from 19.8 ppm to 22.1 ppm is at least 10% and at most 60%, and when an area of a peak (mmmr) of a peak top at 21.5 to 21.6 ppm is expressed as S2, 4+2S1 / S2>5, and Feature (2) a content ratio (mol ratio) of propylene unit (A): other olefin unit (B) is from 100:0 to 90:10.

Description

TECHNICAL FIELD [0001] The present invention relates to a polypropylene type aqueous dispersion excellent in dispersion stability, which is capable of forming a coating film excellent in water resistance and adhesion to a polyolefin base material. BACKGROUND ART [0002] Heretofore, a molded product comprising polyolefin such as polypropylene was often coated on its surface or other resin layer was formed thereon to enhance its additional value. However, generally, since polyolefin does not have a polar group in a molecule, it is poor in adhesion to a paint or other resins. Therefore, heretofore, a polyolefin molded product was previously treated with a primer on its surface to improve adhesiveness and adhesion to a paint, and was coated with a paint. However, most of conventional primers or paints contain an organic solvent or dissolved in an organic solvent, and therefore there were problems that they degraded working environments during production and using. [0003] Under these circ...

Claims

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Application Information

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IPC IPC(8): C08J3/00C08J3/05C08J7/043C08J7/056C08K3/00C08L23/10C08L23/26C08L51/06C08L53/00C09D123/10C09J151/06C09J153/00
CPCC08J3/005C08J3/05C09J153/00C09J151/06C09D123/10C08J7/047C08J2323/10C08J2423/00C08L23/10C08L23/26C08L51/06C08L53/00C08L2666/06C08L2666/24C08L2666/02C08L2666/04C08J7/0427C08J7/043C08J7/056
Inventor ASHIHARA, TERUAKIONOE, MASATOHATA, KAZUYUKISHIMIZU, FUMIHIKOSATO, NAOMASAZANKA, YUKIHITONAKAYAMA, KOUICHI
Owner MITSUBISHI CHEM CORP
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