Unlock instant, AI-driven research and patent intelligence for your innovation.

Powder coating precursors and the use thereof in powder coating compositions

A powder coating, precursor technology, used in powder coatings, coatings, etc.

Inactive Publication Date: 2008-12-03
ENGELHARD CORP
View PDF16 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Use of this powder coating composition provides an improved method of powder coating application by eliminating pigment segregation problems during powder spraying and significantly improving panel appearance when the powder is cured

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Powder coating precursors and the use thereof in powder coating compositions
  • Powder coating precursors and the use thereof in powder coating compositions
  • Powder coating precursors and the use thereof in powder coating compositions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0065] Select 197 grams of Exterior CFSMEARLIN supplied by Engelhard Corporation MAGNAPEARL 2103 product (contains mica platelets (50 to 66 wt %) coated with titanium dioxide (33 to 45 wt %), coated with cerium hydroxide / polymer network (1 to 4 wt %) and tin oxide (less at 1% by weight)) as a silane-coated pearlescent pigment. The silane coating consists of two silanes with different organofunctional groups. Silane-coated pearlescent pigments were mixed with 3 g of primary particle size of 13 nm and surface area of ​​100 m 2 / gram of fumed alumina mixed to form a powder coating precursor. The resulting product has an average particle size of 8 to 10 μm. The powder paint precursor sprayed at 8% powder paint precursor loading in the resin listed in Invention Example 1 showed no separation or buildup of the powder paint precursor at the spray gun nozzle. The appearance of the panels after curing was smooth and of high quality.

Embodiment 3

[0067] Using 197 grams of Exterior CFSMEARLIN supplied by Engelhard Corporation MAGNAPEARL 3103 product (contains mica platelets (43 to 58 wt%) coated with titanium dioxide (41 to 51 wt%), cerium hydroxide / polymer network (1 to 4 wt%) and tin oxide (0.3 to 0.8 wt%) %)) as silane-coated pearlescent pigments. The silane coating consists of two silanes with different organofunctional groups. Silane-coated pearlescent pigments were mixed with 3 g of primary particle size of 13 nm and surface area of ​​100 m 2 / gram of fumed alumina mixed to form a powder coating precursor. The average particle size of the obtained product is 3.5 to 6.5 μm. The powder paint precursor sprayed at 8% powder paint precursor loading in the resin listed above in Inventive Example 1 showed no separation or buildup of the powder paint precursor at the spray gun nozzle. The appearance of the panels after curing was smooth and of high quality with a metallic paint-like appearance.

Embodiment 4

[0069] Using 197 grams of Exterior LUMINA supplied by Engelhard Corporation Turquoise T303D product (contains mica platelets (28.3 to 40.3 wt %) coated with titanium dioxide (58.7 to 66.7 wt %), coated with cerium hydroxide / polymer network (1 to 4 wt %) and tin oxide (0.3 to 0.8% by weight)) as silane-coated pearlescent pigments. The silane coating consists of two silanes with different organofunctional groups. Silane-coated pearlescent pigments were mixed with 3 g of primary particle size of 13 nm and surface area of ​​100 m 2 / gram of fumed alumina mixed to form a powder coating precursor. The powder paint precursor had an average particle size of 16.5 μm.

[0070] The following resins are used: polyester TGIC-free and polyurethane. These resins do not contain alumina. The powder coating precursors were spray coated at 8% powder coating precursor loading in each of the foregoing resin systems. There was no buildup of powder coating precursor at the spray gun nozzle ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

A laminar pigment which has hydrolyzed silane coupling agent treated surface is used as a pigment for a powder coating composition. By combining the pigment with a powdery film-forming polymer, a film-forming composition, which can be applied by electrostatic coating is produced. With the addition of leveling agent to the silane treated products, the spray properties of effect pigments are improved. The products of this invention are useful in all types of automotive and industrial paint applications.

Description

[0001] This patent application claims priority from pending US60 / 488366, filed July 18,2003. Background of the invention [0002] Electrostatic coating methods for applying colored coatings to various substrates are well known. A composition is used in the process which is a chargeable powder mixture of a film-forming polymer and a pigment of the desired color. Unfortunately, in the past, the preparation of such powder coating compositions for application with a powder sprayer has presented problems with flake pigments. [0003] Pearlescent or pearlescent pigments mimic the effect of natural pearls and consist of platelets that are transparent in the visible region of the spectrum. The lamellae are very smooth and partly reflect and partly transmit light that strikes the lamellae. Part of the transmitted light is then reflected by other lamellae layers. The result is multiple reflections from many layers, and this results in a deepening of the gloss as the eye cannot focus ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/03C09D5/36
Inventor J·巴加拉T·希雷伊尔W·沙利文
Owner ENGELHARD CORP