RUBBER COMPOSITION AND STYRENE-BASED RESIN COMPOSITION USING SAME
申请人:UBE Industries, Ltd.
公开号:EP2993207A1
公开(公告)日:2016-03-09
The present invention provides a rubber composition in which solution viscosity and cold flow are improved. The rubber composition according to the present invention includes 20 to 90 wt% of a polybutadiene (A) produced by a metallocene catalyst, having: a cis-1,4-structure in microstructure being 65 to 95 mol%, a vinyl-1,2-structure in microstructure being 4 to 30 mol%, and a weight average molecular weight (Mw) being 2x105 to 1x106; and includes 10 to 80 wt% of polybutadiene (B) having: a Mooney viscosity (ML1+4, 100°C) being 60 or less, a 5 wt% of styrene solution viscosity (St-cp) being 20 to 110; and St-cp/ML1+4 being 1.0 to 2.5, in which a total of the polybutadiene (A) and the polybutadiene (B) is 60 to 100 wt%.
Olefin polymerization catalysts and olefin polymer production methods using said olefin polymerization catalysts
申请人:JSR Corporation
公开号:EP1046654B1
公开(公告)日:2005-06-29
RUBBER COMPOSITION AND STYRENE RESIN COMPOSITION USING THE SAME
申请人:UBE INDUSTRIES, LTD.
公开号:US20160130428A1
公开(公告)日:2016-05-12
Embodiments of the present invention provide a rubber composition in which solution viscosity and cold flow are improved. The rubber composition according to the embodiments of the present invention may include 20 to 90 wt % of a polybutadiene (A) produced by a metallocene catalyst, having: a cis-1,4-structure in microstructure being 65 to 95 mol %, a vinyl-1,2-structure in microstructure being 4 to 30 mol %, and a weight average molecular weight (Mw) being 2×10
5
to 1×10
6.
The rubber composition further includes 10 to 80 wt % of polybutadiene (B) having: a Mooney viscosity (ML
1+4, 100° C.
) being 60 or less, a 5 wt % of styrene solution viscosity (St-cp) being 20 to 110; and St-cp/ML
1+4
being 1.0 to 2.5. A total content of the polybutadiene (A) and the polybutadiene (B) is 60 to 100 wt %.
The chemistry of naturally occurring polyamines. A total synthesis of thermospermine
作者:Kan Chantrapromma、James S. McManis、Bruce Ganem
DOI:10.1016/0040-4039(80)80103-1
日期:1980.1
methodology for distinguishing the similar basic sites in spermidine has led to the first synthesis of thermospermine .