The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 17, 2013
Filed:
Mar. 02, 2004
Werner Hoess, Griesheim, DE;
Arne Schmidt, Darmstadt, DE;
Klaus Albrecht, Mainz, DE;
Klaus Schultes, Wiesbaden, DE;
Werner Hoess, Griesheim, DE;
Arne Schmidt, Darmstadt, DE;
Klaus Albrecht, Mainz, DE;
Klaus Schultes, Wiesbaden, DE;
Evonik Roehm GmbH, Darmstadt, DE;
Abstract
The invention relates to an injection molding method for the production of a complex, high optical quality light-diffusing molded item. The molding material used comprises a matrix made of polymethyl(meth)acrylate and spherical plastic particles whose particle size ranges from 1-24 μm and the concentration thereof ranges from 0.05-30 wt.-% in relation to the weight of the polymethyl(meth)acrylate. The spherical particles exhibit a refractive index differential in relation to the polymethyl(meth)acrylate matrix of 0.01 0.2.