Flaky pigment coated with coupling agent and perfluoralkyl phosphate

A perfluoroalkyl, flake-like technology used in pigment preparation, fibrous fillers, inorganic pigment treatment, etc. Coatings are prone to delamination and other problems

Inactive Publication Date: 2004-04-14
MERCK PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among these known flaky pigments, there are pigments that have excellent floating properties, but have poor interlayer adhesion between pigment particles and coating films, and therefore have a disadvantage of poor durability when used as coatings
That is to say, even if such known flaky pigment particles float on the surface of the coating to achieve the desired set gloss based on their floating properties, the flaky pigment particles and the protective coating applied thereon The adhesion between the clear coats is so low that the clear coats tend to delaminate when applied or removed eg cellophane tape
Therefore, the use of such pigments in coatings does not achieve the required coating durability

Method used

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  • Flaky pigment coated with coupling agent and perfluoralkyl phosphate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Will contain 5.68 grams of sodium hypophosphite (NaH 2 PO 2 ·H 2 O) aqueous solution was gradually added to the stirring at room temperature containing 5.76 g of zirconium oxychloride (ZrOCl 2 ·8H 2 O) in the 3% by weight aqueous solution so as not to produce white precipitates, and make a transparent aqueous solution. Then, 6.0 g of 35-37% aqueous hydrochloric acid solution is added to prepare a mixed solution of zirconyl chloride and sodium hypophosphite.

[0090]Separately, 100 grams of rutile titanium dioxide coated mica titanium flakes (IRIODIN225 Rutile Blue, manufactured by E. Merck) with a particle size of 10-60 microns, blue reflection color and yellow transmission color, were suspended in 1000 ml of water, under stirring The temperature was increased to 75°C. Adjust the pH of the suspension to 3 with hydrochloric acid, and add 1.14 g of 10% by weight cerium chloride (CeCl 3 ·7H 2 O) Aqueous solution, adding the mixed solution of zirconyl chloride and sodium hypoph...

Embodiment 2

[0093] Follow the same steps as Example 1, except that 2 grams of perfluoroalkylsilane CF 3 (CF 2 ) 7 (CH 2 ) 2 Si(OCH 2 CH 3 ) 3 (Toray Dow Corning Ltd. / AY43-158E) In place of perfluoroalkyl phosphate, the same 100g rutile type with a particle size of 10-60 microns and a blue reflection color and a yellow transmission color was used as in Example 1. Mica titanium flakes of titanium dioxide (IRIODIN225 Rutile Blue, manufactured by E. Meck) and other same materials in the same amount to prepare pearlescent pigments.

[0094] Through the above steps, a powdery pearlescent pigment with blue reflection color and yellow transmission color and excellent dispersibility is prepared. When the pigment is suspended in low-polarity organic solvents such as toluene and xylene, the pigment particles will float on the surface of the solvent and oriented densely. According to this, the extremely high reflected color brightness exhibited by the pearlescent pigment can prove that the setting is obt...

Embodiment 3

[0096] Will contain 5.68 grams of sodium hypophosphite (NaH 2 PO 2 ·H 2 O) aqueous solution was gradually added to the stirring at room temperature containing 5.76 g of zirconium oxychloride (ZrOCl 2 ·8H 2 O) in a 3% by weight aqueous solution, so that no white precipitate is produced and a transparent aqueous solution is prepared. Then, 6.0 g of 35-37% hydrochloric acid aqueous solution is added to prepare a mixed solution of zirconyl chloride and sodium hypophosphite.

[0097] Separately, 100 g of iron oxide-coated mica flakes (IRIODIN 504 Red, manufactured by E. Merck) with a particle size of 10-60 microns and a wine-red reflection color were suspended in 1000 ml of water, and the temperature was increased under stirring To 75°C. The pH value of the suspension was adjusted to 3 with hydrochloric acid, and the mixed solution of zirconyl chloride and sodium hypophosphite was added dropwise to the suspension within about 1 hour, while the suspension was adjusted with a 32% by weig...

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Abstract

A flaky pigment excellent in leafing properties and in adhesion between pigment particles and a coating (resin) was obtained by coating the surface of a flaky pigment with a coupling agent and a phosphate having a perfluoroalkyl gorup or a silane compound. Accordingly, the flaky pigment is excellent as a pigment for coating or printing ink of which brightness and durability are required.

Description

Technical field [0001] The present invention relates to flake pigments with excellent floating properties and adhesion. The present invention particularly relates to flake pigments used in coatings and printing inks. The pigments are made of coupling agents and organic compounds containing perfluoroalkyl groups. It is coated, so it has excellent floating performance, and has excellent adhesion between the flake-shaped pigment particles and the coating. Background technique [0002] So far, for many pearlescent pigments and metallic pigments having a foil shape, when they are incorporated into a coating composition or the like, a coating based on a gloss design can be formed by uniformly dispersing flake-shaped pigment particles in the coating layer. Recently, by making flake pigment particles represented by floating type aluminum flake pigments float on the surface of the coating (floating performance or plane orientation) to further improve the gloss of the coating, a variety of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/08C04B2/00C09C1/00C09C1/62C09C3/00
CPCC09C2200/308C01P2006/66C09C1/0021C01P2004/61C09C2200/401C01P2006/65C09C2220/106C09C1/0015C09C2200/408C01P2004/62C09C2200/1004C09C2200/1087C09C2200/102
Inventor 梅原英司国井幸四郎
Owner MERCK PATENT GMBH
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