Abstract:
A polyether rubber comprising units expressed by the following general formula (1) in 0.1 mol % or more but less than 30 mol % is provided. (wherein in the above general formula (1), A+ is a group which contains a cationic nitrogen-containing aromatic heterocyclic ring. Said group which contains a cationic nitrogen-containing aromatic heterocyclic ring is bonded with the carbon atom at the “2” position which is shown in the above general formula (1) through a nitrogen atom which forms said cationic nitrogen-containing aromatic heterocyclic ring. X− is arbitrary counter anion.)
Abstract:
The present invention provides novel bimetallic complexes and methods of using the same in the isoselective polymerization of epoxides. The invention also provides methods of kinetic resolution of epoxides. The invention further provides polyethers with high enantiomeric excess that are useful in applications ranging from consumer goods to materials.
Abstract:
Subject The main aim of the invention is to provide a polymerizable liquid crystal compound that has a liquid crystal phase with a wide temperature range centering at room temperature, has an excellent compatibility with another polymerizable liquid crystal compound, has an excellent solubility in an organic solvent and is polymerizable even in air by heat or light.Means for Solving the Subject A polymerizable liquid crystal compound represented by formula (1-1) or formula (1-2): wherein A1 and A2 are a divalent cyclic-structure group such as cyclohexylene and phenylene; Z1 is a bonding group such as a single bond and —O—; m is an integer from 1 to 5; Q1 and Q2 are alkylene having 1 to 20 carbons; R1 is fluorine, cyano, trifluoromethyl, trifluoromethoxy, alkyl, alkoxy and so forth; and Ra and Rb is hydrogen, halogen or alkyl.
Abstract:
Nitramine oxetanes, specifically 3-methyl nitraminomethyl-3-methyl oxetane and 3,3-Bis (methyl nitraminomethyl) oxetane are synthesized. Polyethers are formed incorporating the nitramine oxetanes, which polyethers are curable with isocyanates to form elastomers suitable for use as binders in propellants or the like.
Abstract:
Configurations of cross-linked or vulcanized amphophilic or quaternized block copolymer of haloalkyl epoxides and hydroxyl terminated alkadiene polymers are useful as battery separators in both primary and secondary batteries, particularly nickel-zinc batteries. The quaternized block copolymers are prepared by polymerizing a haloalkyl epoxide in the presence of a hydroxyl terminated 1,3-alkadiene to form a block copolymer that is then reacted with an amine to form the quaternized or amphophilic block copolymer that is then cured or cross-linked with sulfur, polyamines, metal oxides, organic peroxides and the like.
Abstract:
COMJUGATED DIENE POLYMERS ARE PRODUCED BY REACTING FROM 0.5 TO 2 MOLES OF A HALOALKYLENEOXIDE WITH ONE MOLE OF A LIVING POLYMER PREPARED BY REACTING A CONJUGATED DIOLEFIN OR A MIXTURE OF THE CONJUGATED DIENE WITH A VINYL COMPOUND HAVING THE FORMULA CH2-CR1R2, WHEREIN R1 REPRESENTS A HYDROGEN ATOM OR AN ALKYL GROUP AND R2 REPRESENTS AN ARYL GROUP OR A PYRIDYL GROUP IN THE AND R2 REPRESENTS AN ARYL GROUP OR A PYRIDYL GROUP IN THE PRESENCE OF AN ALIALI METAL OR AN ORGANOALKALI METAL COMPOUND.
Abstract:
A PROCESS OF PREPARING POLYEPOXIDES COMPRISING POLYMERIZING OR COPOLYMERIZNG 1,2-EPOXIDES, USING AS THE NOVEL CATALYST A COMPOSITION COMPOSED OF THE FOLLOWING TWO COMPONENTS: (A) A SPECIFIC METAL SALT OF A CARBOXYLIC ACID, (B) A SPECIFIC ORGANOALUMINUM COMPOUND TO OBTAIN A POLYMER HAVING HIGH CRYSTALLINITY, OR THREE COMPONENTS CONSISTING OF (A) AND (B) ABOVE AND (C), A SPECIFIC ETHER WHEN IT IS DESIRABLE TO OBTAIN LOW CRYSTALLINITY.
Abstract:
Vulcanizable, rubbery copolymers of propylene oxide are made by the copolymerization of propylene oxide with a glycidyl ether containing an allylic terminal group. At least one oxyalkylene or thioalkylene group intervenes between the glycidyl group and the allylic group of the comonomer.
Abstract:
The present invention relates to a polymer including repeating units of the following general formula (1): wherein R1, R2, m, k and the asterisks are as defined in the specification and the claims, and wherein the bromine content in the polymer being 45 to 80 wt %, as well as to a method for producing such polymers.