Core-shell composite inorganic metal oxides and method of preparing for prevention of thermal oxidative degradation in polymer and resin compositions

US9676927B2 · kind B2 · utility

Assignees

• The Shepherd Color Company · US
• LPKF LASER & ELECTRONICS AG · DE

Inventors

• Michael Musick · Sapulpa, US
• David Ziemnik · Waynesville, US
• James P. White · Hamilton, US
• Robin Krüger · Hannover, DE
• Bernd Rösener · Porta Westfalica, DE
• Malte Sebastian Fengler · Hannover, DE

Key dates

• Filing date: Mar 23, 2015
• Grant date: Jun 13, 2017
• Expiry date: Mar 23, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H05K2203/107
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

This invention relates to products of aqueous and other chemical synthetic routes for encapsulation of a core material with an inorganic shell and finished compositions of a core-shell particulate material for application in thermoplastic, thermoset, and coatings resins prior to compounding or application or subsequent thermal processing steps. Disclosed is a composition of particles containing a shell of inorganic oxides or mixed-metal inorganic oxides and a core material of complex inorganic colored pigment, laser direct structuring additives, laser marking, or other beneficial metal oxides, metal compounds, or mixed-metal oxide materials, wherein the shell material is comprised of any single oxide or combination of oxides is taught. Preferred elements of composition for the shell are oxides and silicates of B, Ni, Zn, Al, Zr, Si, Sn, Bi, W, Mo, Cr, Mg, Mn, Ce, Ti, and Ba (or mixtures thereof). Applications may include, but are not limited to, coatings or plastic articles or materials for molded interconnect devices, durable goods, housings, assemblies, devices, and articles that are to be exposed to additional thermal processing. The resulting core-shell materials function in pl…