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Aqueous dispersion composition for imparting chipping resistance

A water-based dispersion, anti-fragmentation technology, applied in the direction of unspecified rubber coatings, coatings, primers, etc., can solve the difficulty of anti-fragmentation of coating films, reduce the cross-linking density of cross-linked coatings, and the strength of coating films , Hot water resistance, damage resistance, etc.

Inactive Publication Date: 2004-11-17
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, it is very difficult to impart chipping resistance to the coating film obtained from water-based paints. So far, only the method of introducing flexible components to the resin skeleton of water-based paints or the method of reducing the crosslinking density of cross-linked paints has been mainly used.
As a result, there has been a problem that various properties of the coating film itself such as strength, hot water resistance, and damage resistance decrease

Method used

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  • Aqueous dispersion composition for imparting chipping resistance
  • Aqueous dispersion composition for imparting chipping resistance
  • Aqueous dispersion composition for imparting chipping resistance

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0112] Aqueous dispersion containing ethylene / propylene copolymer (a)-1 and carboxylic acid-modified thermoplastic polymer (b-1) preparation of body composition

[0113] 100 parts by weight of ethylene / propylene copolymer (elastomer with ethylene / propylene molar ratio of 4 / 6, MFR (230°C): 2.0g / 10min), 10 parts by weight of maleic anhydride-modified polyethylene wax (grafted Amount: 3% by weight, -COO- group: 0.67 mmol / g polymer, [η] (135°C, solvent: decahydronaphthalene): 0.16 dl / g) and 2 parts by weight of potassium oleate were mixed. With the rate of 3000g / h, this mixture is fed into twin-screw extruder (Ikegai Tekkosho PCM-30, L / D=40) by the hopper of twin-screw extruder, simultaneously, 10% potassium hydroxide aqueous solution is mixed with 240g The rate of / h is continuously fed from the feed port installed in the exhaust section of the extruder, and then the resin mixture is continuously extruded at a heating temperature of 230°C. The resin mixture extruded in this ...

preparation Embodiment 2

[0115] Aqueous dispersion containing ethylene / octene copolymer (a)-2 and carboxylic acid modified thermoplastic polymer (b-1) preparation of body composition

[0116] In the same manner as described in Preparation Example 1, an aqueous dispersion composition having a solids concentration of 45%, a pH of 10, and an average particle size of 0.3 μm was obtained with a 99% yield, except that ethylene / octene copolymer (ethylene Elastene / octene molar ratio of 85 / 15, MFR (230°C): 150 g / 10min) to replace ethylene / propylene copolymer.

preparation Embodiment 3

[0118] Containing ethylene / propylene and its polymer (a)-1, carboxylic acid modified thermoplastic polymer (b-1) and 2-(2-amino Preparation of an aqueous dispersion composition of ethyl ethoxy)ethanol (c)

[0119] Add 2-(2-aminoethoxy)ethanol (purchased from Huntsman, Diglycolamine) to the aqueous dispersion composition prepared in Preparation Example 1 to obtain a solid concentration of 44.8%, a pH of 10.5, and an average particle size of 0.8 For an aqueous dispersion composition of μm, the amount of 2-(2-aminoethoxy)ethanol added is 1% by weight, based on 100% by weight of the resin solid content in the aqueous dispersion composition.

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Abstract

An aqueous dispersion composition for imparting chipping resistance which comprises water and dispersed therein a nonvolatile ingredient (film-forming ingredient) comprising a thermoplastic olefin elastomer or an optionally hydrogenated block copolymer of styrene and a conjugated diene. Use of the aqueous dispersion composition as a water-based primer or as an additive for water-based coating compositions gives a coating film which not only has excellent chipping resistance but is excellent in properties including film appearance, adhesion, heat resistance, moisture resistance, and gasoline resistance.

Description

field of invention [0001] The present invention relates to aqueous dispersion compositions for imparting chipping resistance to aqueous coatings. More specifically, the present invention relates to an aqueous dispersion composition for imparting chipping resistance to an aqueous coating film, which is the property that even if a scattering stone or the like hits the coating film such as an automobile exterior panel coating film, The film was also hardly cracked or damaged. background of the invention [0002] Coatings for automotive exterior panels are usually applied by first electrodepositing the underlying coating on the steel plate, applying a solvent-based intermediate coating, and then applying the top coating to form a composite coating film. In recent years, according to market demands, it has been necessary to convert coatings into functional coatings that can impart chipping resistance (the property that the film is hardly cracked or damaged even if stones, etc. h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F255/02C08L51/06C08L53/02C09D5/00C09D5/02C09D151/06C09D153/02
CPCC09D5/024C09D153/025C08L53/025C08L53/02C08L51/06C09D5/002C08F255/02C09D151/06C09D153/02C08L2666/24C08L2666/02C09D5/02
Inventor 蚁川英男时田卓
Owner MITSUI CHEM INC
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