A method for producing a fluorene derivative by reacting fluorenone with a phenol or a phenoxyalcohol in the presence of an acid catalyst includes: adding an alkali to an obtained reaction liquid containing a fluorene derivative; and concentrating a resultant mixture liquid without removing the alkali thus added and a reaction product of the alkali, thereby separating an unreacted phenol or unreacted phenoxyalcohol.

Method for producing fluorene derivative

The present invention provides a novel continuous polymerization apparatus which is able to efficiently produce a polymer composition suitable for obtaining a resin composition with high quality. In a continuous polymerization apparatus, at least, a first reactor of a complete mixing type and a second reactor of a complete mixing type (10, 20) are used. Each of the reactors (10, 20) is provided with a supply port (11a, 21a), an effluent port (11b, 21b), and a temperature detecting means (T) for detecting a temperature in the reactor, wherein the supply port (11a) of the first reactor (10) is connected to the supply sources (1, 3) of a raw material monomer and a polymerization initiator, and the effluent port (11b) of the first reactor is connected through a connection line (15) provided with a cooling means (16) to the supply port (21a) of the second reactor (20). The cooling means (16) is controlled to make the temperature in the connection line adjacent to the supply port (21a) of the second reactor lower than the temperature in the first reactor (10).

Continuous polymerization apparatus and process for producing polymer composition

The present invention relates to novel, soluble, multi-ligand-substituted metal oxide compounds to form metal oxide films with improved stability as well as compositions made from them and methods of their use. Specifically, the invention pertains to a compounds having structure (I), wherein M is a metal and n is 1 to 20, and wherein at least one of R1, R2, R3, and R4 is i) and at least at least one of R1, R2, R3, and R4 is ii), where i) is a silicon bearing organic moiety having at least 2 carbons, and ii) is an organic moiety. The invention also relates to spin-coatable composition of compounds of structure (I) dissolved into a solvent. The present invention further relates to processes using this spin coatable composition to form a coating on a patterned substrate.

Stable metal compounds as hardmasks and filling materials, their compositions and methods of use

Provided is a boot for a constant velocity universal joint capable of being properly engaged with an outer joint member of a constant velocity universal joint and capable of increasing durability thereof. Over a shoulder portion ( 5 ) and a root portion ( 13 ) of a boot ( 1 ) for a constant velocity universal joint according to the present invention, there are formed a circular arc portion ( 14 ) adjacent to a large diameter portion ( 2 ) and having an axial sectional shape protruding radially outward and a linear portion ( 15 ) adjacent to the circular arc portion ( 14 ) and having a linear axial sectional shape. An innerperipheral surface ( 16 ) of the linear portion ( 15 ) is brought into contact with an opening end portion ( 17 ) of an outer joint member ( 7 ) of a constant velocity universal joint ( 6 ) such that a thickness from the circular arc portion ( 14 ) to the linear portion ( 15 ) is uniform.

Boot for constant velocity universal joint

The present disclosure relates to spin-on compositions containing at least one metal oxide dicarboxylate and an organic solvent into which the metal oxide dicarboxylate is soluble or colloidally stable. The dicarboxylate is capable of decomposing during heat treatment to give a cured metal oxide film. The present disclosure also relates to method of using the spin-on compositions.

Spin-on compositions of soluble metal oxide carboxylates and methods of their use

PURPOSE:To obtain the subject compound without using particular corrosion- resistant reactor by reacting a phenolic compound with an aldehyde in the presence of a heteropolyacid catalyst. CONSTITUTION:A compound of the formula (R is H, alkyl or halogen; R is H, alkyl, aryl or aralkyl) is produced by reacting a phenolic compound with an aliphatic aldehyde or an aromatic aldehyde using a heteropolyacid (e.g. phosphotungstic acid) as an acid catalyst optionally in a solvent (e.g. acetic acid) at 15-120 deg.C. The amounts of the phenolic compound and the heteropolyacid are 2-50mol and 0.001-1mol based on 1mol of the aldehyde, respectively. Heteropolyacid has low corrosivity and stable catalytic activity. It is easily usable and does not cause the lowering of the reaction rate by water produced as a by-product of the reaction. Among the compounds of the formula, the yield of bis(4-hydroxyphenyl)methanes useful to improve the properties of epoxy resins can be selectively increased by the use of heteropolyacid.

Production of bis@(3754/24)hydroxyphenyl)methanes

PURPOSE: To produce the acrylic resin high in the all wavelength light transmission narrow in the mol.wt. distribution and having a high quality by subjecting monomers consisting mainly of methyl methacrylate to a multistage polymerization under a prescribed condition without using a specific polymerizer. CONSTITUTION: For example, in the case of a two-staged polymerization, a monomer mixture comprising ≥70wt.% of methyl methacrylate and its copolymerizable vinylic compound, a radical polymerization initiator, etc., are homogeneously mixed, heated to 60-180°C with a heater 4, fed into the first polymerizer 5, controlled at the same temperature, and subsequently copolymerized to a conversion of 10-35%. The produced polymer-containing mixture and a solvent 8 are fed in a weight ratio of 30-90/70-10 into the second polymerizer 10 and subsequently copolymerized to a conversion of ≥80% at the same polymerization temperature as that of the first polymerizer within the temperature fluctuation of ±10°C. After the polymerization, the solvent, the unreacted monomers and low mol.wt. polymers are removed from the produced polymer-containing mixture to provide the objective acrylic resin. COPYRIGHT: (C)1993,JPO&Japio

Kazuo Zushi

Papers

Production of bis@(3754/24)hydroxyphenyl)methanes

Production of acrylic resin