Nitto-denko Corporation

The General Hospital Corporation

Tomoko Doi

Michiharu Yamamoto

Yutaka Moroishi

Henry M Kronenberg

Masakazu Sugimoto

Kenichi Okada

Yukio Arimitsu

Tetsuo Inoue

Fumiko Nakano

Daisuke Shimokawa

Fumiko Kamifuji

Samuel R Nussbaum

A method of thermal adherend release, wherein a part of adherends adherent to a heat-peelable pressure-sensitive adhesive sheet having a heat-expandable layer containing a foaming agent are selectively released from the pressure-sensitive adhesive sheet by partly heating the heat-peelable pressure-sensitive adhesive sheet, wherein the method comprises previously heating a sticking site of an adherend to be released at a temperature at which the heat-expandable layer of the heat-peelable pressure-sensitive adhesive sheet does not expand and then heating the sticking site of the adherend in the heat-peelable pressure-sensitive adhesive sheet at a temperature at which the heat-expandable layer expands to thereby selectively releasing the adherend.

Method of thermal adherend release and apparatus for thermal adherend release

The object of the present invention is to produce a polymer, which is free from the troubles of the coloration and the decrease in the mechanical properties of molded articles (films, etc.), crosslinkage failure, migration (stain) or the like, by the living radical polymerization method wherein the content of impurities consisting of a transition metal and its ligand employed as a polymerization activator is reduced. A process for producing a polymer is described, comprising: a) the step of performing a polymerization reaction by using a monomer, a transition metal and its ligand and a polymerization initiator to form a polymer; and b) the step of eliminating the transition metal and its ligand contained in the polymer under the condition of a viscosity of 100 Pa&middot;s or below, wherein the step b comprises: b1) the former step of eliminating the transition metal and its ligand insoluble in the polymer; and b2) the latter step of eliminating the transition metal and its ligand dissolved in the polymer.

Process for producing polymer

A pressure-sensitive adhesive composition having well-balanced pressure-sensitive adhesive force and cohesive force without causing any safety or economy problems, a process for the preparation of the same and pressure-sensitive adhesive sheets using the same are disclosed. The pressure-sensitive adhesive composition comprises a crosslinked polymer obtained by crosslinking a block copolymer comprising at least two of a styrene-based polymer block A and an acrylic polymer block B having a structural unit represented by the general formula (1):&mdash;&lsqb;CH &boxH;C(R )COOR &rsqb;&mdash; wherein R represents a hydrogen atom or methyl group, and R represents a C alkyl group, bonded each other, such as A-B or B-A type block copolymer and A-B-A type block copolymer.

Pressure-sensitive adhesive composition, process for the preparation thereof and pressure-sensitive adhesive sheets

A recombinant DNA molecule coding for human parathyroid hormone operably linked to an inducible bacterial promoter, a leader growth hormone sequence, and a selective enzymatic cleavage site, expression of the molecule in bacteria, and methods for producing large quantities of human parathyroid hormone and its variants.

Recombinant DNA method for production of parathyroid hormone

Growing community of inventors

Osaka, Japan

Tomoko Doi