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:
May. 17, 1983
Filed:
Apr. 28, 1981
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
Aqueous dispersions of polymers containing (meth)acrylic acid alkyl ester units which contain the polymer in the form of relatively large, non-agglomerated, spherical particles (=main spheres) and relatively small, non-agglomerated, spherical particles (=filler spheres), wherein the smaller filler spheres have an average particle diameter d.sub.F measured using an electron microscope of from 50 to 150 nanometers (nm) and the average diameter of the large main spheres d.sub.H is from 1.35 to 3.5 times larger than the average particle diameter d.sub.F, provided that d.sub.H is at least 140 nm, and wherein the ratio of the total mass of the polymer composed of main spheres M.sub.H to the total mass of the polymer composed of filler spheres M.sub.F is