A novel mixture containing a number of particular mercaptans, a process for preparing it and its use as advantageous molecular weight regulator in the production of synthetic rubbers are provided.
Durch Zugabe von Wachsen oder wachsartigen Substanzen in Kombination mit Metallsalzen bzw. -komplexen organischer Verbindungen zu Pulverlacken auf Basis von Epoxidharzen und gesättigten Polyestern mit endständigen Carboxylgruppen wird ohne wesentliche Beeinträchtigung der sonstigen Lackeigenschaften ein Mattierungseffekt erzielt.
NITRILE-GROUP-CONTAINING COPOLYMER RUBBER, CROSSLINKABLE RUBBER COMPOSITION, AND CROSSLINKED RUBBER
申请人:Zeon Corporation
公开号:EP3176190A1
公开(公告)日:2017-06-07
A nitrile group-containing copolymer rubber containing α,β-ethylenically unsaturated nitrile monomer units in a ratio of 10 to 60 wt% and having a Z-average radius of gyration of 100 nm or more is provided. Preferably, the nitrile group-containing copolymer rubber of the present invention has an iodine value of 120 or less. Further, preferably, the nitrile group-containing copolymer rubber of the present invention has a plasticity number of 14 to 90. According to the present invention, it is possible to provide a nitrile group-containing copolymer rubber able to give a cross-linked rubber excellent in tensile stress, compression set resistance, and low heat buildup property.
METHOD FOR PRODUCING HIGHLY SATURATED NITRILE RUBBER
申请人:Zeon Corporation
公开号:EP3252084A1
公开(公告)日:2017-12-06
A method of production of a highly saturated nitrile rubber is provided , the method comprising: a polymerization step of polymerizing a monomer mixture containing at least an α,β-ethylenically unsaturated nitrile monomer and diene monomer in a medium to obtain a dispersion or solution of a nitrile rubber; a coagulation step of causing the dispersion or solution of the nitrile rubber to coagulate at 10 to 60°C to obtain a solid form nitrile rubber; and a hydrogenation reaction step of causing the solid form nitrile rubber obtained by the coagulation step to disperse or dissolve in a medium to obtain a dispersion or solution of the nitrile rubber and performing a hydrogenation reaction of the obtained dispersion or solution of the nitrile rubber to thereby obtain a dispersion or solution of a highly saturated nitrile rubber, wherein in the hydrogenation reaction, the content of a compound having a mercapto group having 9 to 12 carbon atoms is 50 wt ppm or less and the content of a compound having a mercapto group having 13 to 16 carbon atoms is 1 to 120 wt ppm with respect to 100 wt% of the content of the nitrile rubber in the dispersion or solution of the nitrile rubber.
METHOD FOR PREPARING STYRENE-BUTADIENE RUBBER AND STYRENE-BUTADIENE RUBBER
申请人:LG Chem, Ltd.
公开号:EP3309184A1
公开(公告)日:2018-04-18
The present invention relates to a method for preparing a styrene-butadiene rubber and a styrene-butadiene rubber prepared thereby, wherein the method is capable of improving physical properties of the styrene-butadiene rubber prepared by, while using a molecular weight adjuster containing two or more ingredients in a polymerization reaction, optimizing the feeding time of each of the ingredient of the molecular weight adjuster. The styrene-butadiene rubber prepared by the preparation method of the present invention has improved properties, such as tensile strength and tensile elongation, and thus, can be favorably used in the manufacturing of a tire having eco-friendly features, wear resistance, and the like