Asahi Kasei Chemicals Corporation

Asahi Kasei Kabushiki Kaisha

Yoshito Kuroda

Harumi Watanabe

Masako Yokoyama

Yuji Okada

Hiroji Oda

The present invention provides organopolysiloxane comprising one or more unsaturated bond-containing group(s) in one molecule and having constitutional units F1, M1, and T in any combination of wherein Rrepresents any selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 10 carbon atoms, a substituted or unsubstituted aryl group, and a substituted or unsubstituted aralkyl group; Rrepresents an unsaturated bond-containing group having 2 to 10 carbon atoms; X represents a divalent hydrocarbon group having 2 to 10 carbon atoms; Y represents a divalent hydrocarbon group having 2 to 10 carbon atoms; and a, b, and c each independently represent an integer of 1 or larger, wherein F1 represents a unit constituting cyclic organopolysiloxane.

Organopolysiloxane, method for producing the same, and curable resin composition containing the organopolysiloxane

An epoxy silicon, which comprises at least a compound represented by the following general formula (1), and a compound represented by the following general formula (2); and which is represented by an average composition formula (3), wherein a value of [g/(a+b+c+d+e+f+g+h+i+j)] falls within a range of 0.020 or less. 

Epoxy silicone and process for producing same, and curable mix composition using same and use thereof

A glycolic acid copolymer comprising (a) 80 to less than 95% by mole of glycolic acid monomer units, (b) 5.0 to 20.0% by mole of non-glycolic, hydroxycarboxylic acid monomer units, and (c) 0 to 0.10% by mole of diglycolic acid monomer units, the non-glycolic, hydroxycarboxylic acid monomer units (b) constituting a plurality of segments each independently consisting of at least one monomer unit (b), wherein the segments have an average chain length of from 1.00 to 1.50 in terms of the average number of monomer unit or units (b), the total of the components (a), (b) and (c) being 100% by mole, the glycolic acid copolymer having a weight average molecular weight of 50,000 or more.

Glycolic acid copolymer and method for production thereof

A method for producing high purity glycolic acid crystals, which comprises the steps of: (1) providing an aqueous glycolic acid solution (A) which has (a) a water content of from 5 to 20% by weight, (b) a calculated monomeric glycolic acid weight ratio (ratio of the total weight of the monomeric glycolic acid and the component monomeric glycolic acid of the glycolic acid condensation product to the weight of the aqueous glycolic acid solution (A)) of from 0.60 to 1.00 and (c) a monomeric glycolic acid content of from 20 to 57% by weight; (2) depositing glycolic acid crystals from the solution (A); and (3) separating the deposited glycolic acid crystals from the solution (A).

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Tokyo, Japan

Yoshito Kuroda