Denki Kagaku Kogyo Kabushiki Kaisha

Sony Corporation

Sekisui Chemical Co., Ltd.

Denka Company Limited

Hirohisa Otake

Akio Nishijima

Satoshi Ozai

Tatsuya Iwamoto

Shougo Yoshida

Michio Shimamoto

Ryousuke Komatsu

Satoshi Watanabe

Nobuyuki Tanno

Yukihisa Hoshino

Takao Hashimoto

The present invention provides modified PVA having unsaturated double bonds derived from a specific monomer in the main chain of the molecule. A modified polyvinyl alcohol containing bond units of the formula (1) having double bonds in its molecular main chain: wherein each of X1 and X2 is a Clower alkyl group, a hydrogen atom or a metal atom, g is an integer of from 0 to 3, h is an integer of from 0 to 12, Y1 is a hydrogen atom or &#x2014;COOM, and M is a hydrogen atom, an alkyl group or a metal atom.

Modified polyvinyl alcohol and process for producing the same

There is provided an interlayer film for laminated glass which is capable of enhancing sound insulating properties in the laminated glass obtained in the case of being used for constituting the laminated glass, and laminated glass prepared using the interlayer film for laminated glass. An interlayer film for laminated glass according to the present invention includes a modified polyvinyl acetate and a plasticizer, and the modified polyvinyl acetate has a vinyl acetate structural unit and a fatty acid vinyl ester structural unit; the laminated glass according to the present invention includes a first laminated glass constituent member, a second laminated glass constituent member, and an interlayer film sandwiched between the first and second laminated glass constituent members, and in the laminated glass according to the present invention, the interlayer film is the interlayer film for laminated glass described above.

Interlayer for laminated glass, and laminated glass

A vinyl chloride/vinyl acetate copolymer characterized in that it has a peak at a signal position of from 6.0 to 8.0 ppm in the .sup.1 H-NMR measurement.

Vinyl chloride/vinyl acetate copolymer, binder for a magnetic recording

A binder resin for a heat transfer layer, which consists essentially of a polyvinyl acetacetal resin (I) having an acetacetalation degree of at least 87% by weight, the weight ratio of cis-vinyl acetacetal moiety/trans-vinyl acetacetal moiety in the acetacetal moiety of the resin (I) being from 1 to 4.

Binder resin for a heat transfer layer and heat transfer ink ribbon

Growing community of inventors

Shibukawa, Japan

Hirohisa Otake