Mitsubishi Chemical Corporation

Asahi Glass Company, Limited

The Nippon Synthetic Chemical Industry Co., Ltd.

Yasuhiro Hirano

Kaoru Inoue

Mitsuo Shibutani

Shigeru Aida

Eiichi Nishi

Chizuko Furo

Shusaku Mandai

Ryosuke Taniguchi

Ken Sato

Shintaro Fukunaga

Kenji Shinohara

Seiji Maeda

Kaname Kida

Kenji Furui

Akinobu Inakuma

A diverting agent of the present invention contains a polyvinyl alcohol-based resin, wherein when the diverting agent is added to a 0.48 mass % aqueous solution of guar gum to prepare a mixed solution having a concentration of 12 mass %, a dispersion liquid obtained by dispersing the mixed solution at 30&#xb0; C. for 60 minutes is pressurized and dehydrated at a pressure of 1 MPa using a pressure dehydration device including a drainage part having a slit having a width of 2 mm, and a regression line represented by an equation (A): y=ax+b (in the equation (A), y is a cumulative dehydration amount (g), x is a square root of a time (minutes) elapsed from start of pressurization, a and b are a slope and an intercept of the regression line, respectively, and 0&#x3c;x&#x2264;2) is calculated by a least squares method from a scatter diagram plotted on a graph in which the square root x of the time is plotted on a horizontal axis and the cumulative dehydration amount y is plotted on a vertical axis, a slope a of the equation (A) satisfies a condition (B): a&#x2264;80.

Diverting agent and method of filling fracture in well using same

A biodegradable laminate, wherein a polyvinyl alcohol resin layer is laminated on at least one surface of an aliphatic polyester resin layer through an adhesive layer, which is excellent in biodegradability and gas barrier properties, and also excellent in interlayer adhesiveness, is obtained. The adhesive layer comprises, as a main component, a polyester resin (A') which has a polar group and is obtained by graft polymerization of an &#x3b1;,&#x3b2;-unsaturated carboxylic acid or an anhydride thereof on a biodegradable polyester resin (A) comprising at least one structural unit selected from structural units represented by the following general formulae (1), (2), and (3): 

Biodegradable laminate

Disclosed is a resin composition comprising a melt-moldable side chain 1,2-diol-containing PVA-based resin (A), and fluororesin containing a polar functional group capable of reacting with or forming hydrogen bond(s) with hydroxyl group (B). The component (A) and the component (B) have excellent affinity, and therefore if either the component (A) or component (B) becomes matrix, the other can be finely dispersed into the matrix, thus providing a resin composition having excellent gas-barrier property, solvent resistance, and bending fatigue resistance. The present invention also provides emulsified dispersion and binder in which the resin composition is used.

Resin composition and use thereof

Growing community of inventors

Osaka, Japan

Yasuhiro Hirano