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:
Oct. 28, 1980
Filed:
Jan. 15, 1979
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
Pigment preparations containing 2-70 % by weight, relative to the total preparation, of an inorganic or organic pigment dispersed in a solution of 10 to 49% by weight, relative to the total preparation, of a water-insoluble copolymer in an organic solvent, the copolymer containing 40-60% by weight of acrylic acid ethyl ester, 30-50% by weight of methacrylic acid methyl ester and 5-15 % by weight of acrylic acid hydroxyethyl and/or hydroxypropyl ester or methacrylic acid hydroxyethyl and/or hydroxypropyl ester and being prepared at 50.degree.-170.degree. C. in the presence of 0.5-5.0% by weight, relative to the sum of the monomers, of an organic per-compound or an azo compound which supplies free radicals at 50.degree.-170.degree. C., in an organic solvent, and their use for pigmenting dressing agents for leather and imitation leathers.