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:
Aug. 29, 2000
Filed:
Mar. 25, 1996
Volker Benz, Hoechst, DE;
Michael Mueller, Bensheim, DE;
Roehm GmbH Chemische Fabrik, Darmstadt, DE;
Abstract
A multiribbed plate of an impact-resistant polymethyl methacrylate SP, wherein the impact-resistant polymethyl methacrylate SP is made of: p1) 4-30 wt % of an elastomer phase E of crosslinked polymer particles VP, made of 60-99.9 parts by weight alkyl acrylate, aryl acrylate or a mixture thereof, 0.1-10 parts by weight of one or more crosslinking agents, and 0-30 parts by weight of one or more monofunctional ethylenically unsaturated comonomers; and p2) 70-96 wt % of a thermoplastic matrix phase M of polymethyl methacrylate P, containing from 0 to 20 parts by weight, relative to 100 parts by weight P, of units from one or more comonomers, wherein the elastomer phase E and the matrix phase M have refraction indices which are the same or which deviate from one another by a value n, wherein n.ltoreq.0.02, and the sum of p1) and p2) is 100 wt %, and wherein the multiribbed plate has specific geometric construction requirements providing high impact-resistance and hail resistance.