POLYETHER PREPARATION METHOD, PREPOLYMER PREPARATION METHOD, AND MODIFIED SILICONE POLYMER PREPARATION METHOD

WIPO Patent Application WO/2013/065802

A1

In order to make it possible to prepare high-molecular weight polyethers with lower viscosity, this polyether preparation method has a polymerization step in which a polyether is obtained by subjecting a monoepoxide with a carbon number of two or greater to ring-opening addition polymerization using an initiating agent that has at least one active hydrogen-containing functional group in the presence of a catalyst in a mixing vessel (1), wherein the mixing vessel (1) is provided with: a mixing rod (2) that is disposed in the center of the mixing vessel (1) and that can be rotated by an external drive source; plate-shaped bottom paddles (5, 5) that are mounted on the bottom of the mixing rod (2) and extend in the radial direction of the mixing vessel (1); a lattice wing (6) that is mounted above the bottom paddles (5, 5) of the mixing rod (2), and comprises arm paddles (7a, 7b, 7c) that extend in the radial direction of the vessel and strips (8a, 8b) that extend in the axial direction of the vessel; and discharge nozzles (10) that are a supply means for discharging the monoepoxide to at least two locations below the lower edges of the strips (8a, 8b) inside the mixing vessel (1).

ARAI TAKEAKI (JP)
SUZUKI TOMOYUKI (JP)
SUZUKI CHITOSHI (JP)
TANAKA HIDEAKI (JP)

PCT/JP2012/078388

May 10, 2013

November 01, 2012

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ASAHI GLASS CO LTD (JP)

C08G65/28; C08G65/336; C09K3/10

WO2011111797A1

2011-09-15

JPH05247199A	1993-09-24
JPH06200012A	1994-07-19
JP2003342361A	2003-12-03
JP2004231883A	2004-08-19
JP2946580B2	1999-09-06

SENMYO, Kenji et al. (JP)
Spring name Kenji (JP)

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