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

A water-based dispersion and polypropylene-based technology, applied in coatings, adhesives, etc., can solve problems such as lack of dispersion stability, large particle size of dispersed particles, and decreased adhesion of coating film smoothness to polyolefin substrates.

Inactive Publication Date: 2005-08-03
MITSUBISHI RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, this conventional method still has the following problems. Due to the large particle size of the dispersed particles of the obtained aqueous dispersion, sufficient dispersion stability for practical application cannot be obtained, and the smoothness of the coating film cannot be obtained. , Decreased adhesion to polyolefin substrates

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

Embodiment 1

[0273] 1. Synthesis of Polypropylene

manufacture example 1

[0275] (1) Synthesis of dichloro[dimethylsilylene (cyclopentadienyl) (2,4-dimethyl-4H-1-azulene)] hafnium

[0276] (1) Synthesis of -1 ligand

[0277] 2-Methylazulene (4.01g) was dissolved in tetrahydrofuran (56ml), and after cooling to 0°C with an ice bath, 24.8ml of methyllithium ether solution (1.14mol / l) was added dropwise at the same temperature. After the dropwise addition, the ice bath was removed and the mixture was stirred for 2 hours. This solution was slowly added dropwise to a tetrahydrofuran solution (140 ml) of dimethylsilyl dichloride (34.0 ml, 0.280 mol) cooled to 0° C. with an ice bath. After the dropwise addition, the ice bath was removed and the mixture was stirred for 3 hours, and then the solvent and unreacted dimethylsilyl dichloride were distilled off under reduced pressure. Tetrahydrofuran (80ml) was added and cooled to 0°C, and sodium cyclopentadienate (2.1mol / l, 26.9ml, 56.5mmol) was slowly added dropwise. After the addition was complete, the ...

Embodiment 2

[0305] In a glass flask equipped with a thermometer, a condenser, a stirrer, and a dropping funnel, add 300 g of polypropylene, 100 g of maleic anhydride, and 900 g of chlorobenzene synthesized by the above [Manufacturing Example 1], and make the system The temperature was raised to 130°C for dissolution. Next, a solution in which 25 g of dicumyl peroxide was dissolved in 300 g of chlorobenzene was dropped over 5 hours at the same temperature, and an aging reaction was performed for 3 hours. After the reaction was completed, it was cooled to around room temperature, the reaction solution was added to 4.5 kg of acetone, and the precipitated maleic anhydride-modified polypropylene was filtered. The modified resin was added to 4.5 kg of acetone again for purification, and then filtered and vacuum-dried. An infrared absorption spectrum test was performed on the obtained white powdery modified resin, and the result was that the maleic anhydride group content was 4.1% by weight. ...

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Abstract

A polypropylene type aqueous dispersion comprising the following components (a) to (c): (a) a polypropylene type polymer and / or a modified polypropylene type polymer 100 parts by weight (b) a surfactant 1 to 100 parts by weight, and (c) water 100 to 1,000 parts 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 mu m, 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 <13>C-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-based aqueous dispersion excellent in dispersion stability and capable of forming a coating film excellent in adhesion to a polyolefin base material and water resistance. Background technique [0002] Conventionally, molded products made of polyolefins such as polypropylene have often been coated on the surface or formed with other resin layers in order to increase their added value. However, generally speaking, since polyolefins lack polarity because they do not contain polar groups in their molecules, their adhesion to paints and other resins is poor. For this reason, in the past, the surface of the molded product was generally pre-treated with a primer, and then the coating was carried out after the adhesion and adhesion of the paint were improved. However, there are also problems such as the fact that most conventional primers and paints contain organic solvents or are used after being dissolved in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/03C08L23/10C08L51/06C09D123/10
CPCC09D123/10C08L23/10C08L51/06C08J3/03C08J2323/12
Inventor 芦原照明尾上真人畑和行清水史彦佐藤直正残华幸仁中山耕一
Owner MITSUBISHI RAYON CO LTD
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