POLAR MODIFIER SYSTEMS FOR HIGH VINYL BLOCK COPOLYMERIZATION

WIPO Patent Application WO/2018/047008

A3

Polar modifier systems based on a blend of DTHFP, ETE, TMEDA, DMTHFMA and/or functionally similar compounds with BDMAEE and SMT are used to make block copolymers having high levels of pendant vinyl double bond repeat units, which is through highly selective 1,2-bond butadiene addition, low vinylcyelopentane formation, unimodal narrow molecular weight distribution, and a low level of randomized co-monomer repeat units. The block copolymers have very high levels of 1,2-vinyl content and high 3,4-vinyl bond addition of the conjugated diene monomer and low vinylcyelopentane content, the: polar modifier systems provide a fast polymerization rate, with a unimodal narrow molecular weight distribution. The polar modifier systems allow operation at a higher temperature than in prior art systems, which reduces cooling requirements.

ELIZARRARAS MAYA DANIEL (MX)
HARDIMAN CHRISTOPHER (US)
CORONA GALVAN SERGIO (ES)
MOCTEZUMA ESPIRICUETO SERGIO (MX)
RODRIGUEZ GUADARRAMA LUIS (ES)

PCT/IB2017/001270

June 07, 2018

September 08, 2017

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DYNASOL ELASTOMEROS SA DE CV (MX)

C08F297/04; C09J153/02

US20110092650A1	2011-04-21
US6372863B1	2002-04-16
US5798419A	1998-08-25

KOZAK ET AL.: "Influence of polar modifiers on microstructure of polybutadiene obtained by anionic polymerization. Part 3: Lewis acid alkoxide (u) and Lewis base amine, amine-ether, and ether mixed type (o +u) polar modifiers", INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION, vol. 21, no. 1, 2016, pages 44 - 58, XP055490199, [retrieved on 20151215]

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