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:
Mar. 24, 1981
Filed:
May. 23, 1979
Bela Mariasi, Kazincbarcika, HU;
Laszlo Molnar, Kazincbarcika, HU;
Janos Toth, Kazincbarcika, HU;
Imre Gulya, Kazincbarcika, HU;
Miklos Nagy, Budapest, HU;
Ervin Wolfram, Budapest, HU;
Miklos Zrinyi, Erd, HU;
Gaborne Kovacs, Budapest, HU;
Laszlone Jaksity, Budapest, HU;
Borsodi Vegyi Kombinat, Kazincbarcika, HU;
Abstract
This invention relates to novel partially saponified polyvinyl acetates with a degree of hydrolysis of 30 to 65 mole % which might be considered as vinyl alcohol-vinyl acetate block copolymers. The invention relates further to the application of said novel block copolymers as a pore-forming additive used together with at least one known protective colloid in the homo- and copolymerization of vinyl compounds, primarily of vinyl chloride in a pure aqueous medium.