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:
Sep. 29, 1981
Filed:
Apr. 24, 1980
Kazumasa Kamada, Otake, JP;
Kazuya Okada, Otake, JP;
Mitsubishi Rayon Co., Ltd., Tokyo, JP;
Abstract
A radiation-shielding plastic material having an excellent transparency and superior mechanical properties, is produced by polymerizing, in the presence of a lead compound, a mixture of a vinyl monomer component (A) consisting of at least one member selected from alkyl methacrylates and acrylates, hydroxyalkyl methacrylates and acrylates and styrene and an organic acid component (B) containing, as an indispensable ingredient, at least one member selected from the compounds of the formulae (I) through (IV): ##STR1## wherein R.sub.1 =C.sub.1-10 hydrocarbon radical, R.sub.2 =C.sub.1-7 hydrocarbon radical, R.sub.3 and R.sub.4 =H or CH.sub.3, R.sub.5 =C.sub.2-7 hydrocarbon radical, R.sub.6 =C.sub.1-3 hydrocarbon radical and n=0.about.4.