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:
Jan. 21, 2025
Filed:
Dec. 27, 2018
Public Joint Stock Company “sibur Holding”, Tobolsk, RU;
Ivan Anatolievich Babin, Tomsk, RU;
Svetlana Igorevna Gustyakova, Istanitsa Dinskaya, RU;
Egor Evgenievich Popovtsev, g. Seversk, RU;
Denis Alekseevich Lenev, Khimki, RU;
Public Joint Stock Company “Sibur Holding”, Tobolsk, RU;
Abstract
Disclosed herein are modified diene-containing (co)polymers, in particular, modified styrene-butadiene copolymer, which can be used as flame retardants for expandable polystyrene polymer compositions. In particular, disclosed is a modified diene-containing (co)polymer, a method for preparing it, and use as a flame retardant for expandable polystyrene. The modified diene-containing (co)polymer claimed in the invention is characterized by high thermostability, namely, a 5% weight loss temperature of at least 180° C., a molecular weight of at least 1500 g/mol and a halogen content of at least 35 wt. %; the content of tertiary and/or allyl halogenides is in the range from 0 to less than 1.5 wt. %, and also does not affect the polymerization process and the formation of polystyrene granules either, and allows to obtain polystyrene granules with a yellowness index of 2 to 6 units, comparable to the yellowness index of polystyrene granules containing HBCD (from 0 to 3 units).