Sumitomo Chemical Company, Limited

Daikin Kogyo Co., Ltd.

Other

Daikin Industries, Ltd.

Takeda Chemical Industries, Inc.

Unitika Ltd.

Takeo Saegusa

Akira Yamada

Masahiro Niwano

Akitoshi Iwatani

Takenobu Kanazawa

Yoshiyuki Sano

Masaaki Iwase

Shiro Kobayashi

Jugo Goto

Jiro Horikawa

Yasuhiro Moriuchi

Osami Shinonome

Taro Tokuzawa

Masatoshi Miyamoto

Yoshiharu Kimura

A polyether-polyamide block copolymer having an ethylenically unsaturated group represented by formula (I): ##STR1## wherein symbols are as defined in the specification; and a polyether prepolymer represented by formula (II): ##STR2## wherein the symbols are as defined in the specification, which is a starting material for synthesizing the above polyether-polyamide block copolymer, are disclosed. The polyether-polyamide block copolymer exhibits improved heat stability while retaining excellent characteristics inherent to polyether-polyamide.

Polyether-polyamide block copolymer and polyether prepolymer

A fluorine-containing composition represented by formula (I) ##STR1## wherein X represents a group containing a polyfluoroaliphatic group having from 3 to 26 carbon atoms; R represents a hydrogen atom or an aliphatic group having from 1 to 3 carbon atoms; n represents an integer of from 2 to 3; p represents an integer of from 1 to 100; and Y represents a group represented by formula (II) or formula (III) ##STR2## wherein R represents a hydrogen atom or an aliphatic group having from 1 to 3 carbon atoms; n represents an integer of from 2 to 3; and Z represents an iodine atom, a sulfonate group, or a sulfate group, ##STR3## wherein R represents a hydrogen atom or an aliphatic group having from 1 to 3 carbon atoms; n represents an integer of from 2 to 3; and Z.sup.1 represents an iodine atom, a bromine atom, a chlorine atom, or a hydroxyl group; and a process for preparing the same.

Fluorine-containing compositions and process for preparing the same from

A method for producing a polyether-polyamide block copolymer is disclosed, comprising copolymerizing, in the presence of an anionic polymerization catalyst, a lactam and a polyether prepolymer presented by the formula: ##STR1## wherein R.sup.1 is an aliphatic hydrocarbon residual group having 2 to 6 carbon atoms, R.sup.2 is an aliphatic hydrocarbon residual group having 3 to 12 carbon atoms, and n is an integer of 4 to 450. The polyester prepolymer is prepared by reacting a polyoxyalkylene having two terminal hydroxy groups with an N-chlorocarbonyl lactam. The polyether-polyamide block according to the invention has high impact strength and is substantially colorless.

Method of producing a polyether prepolymer

A polymer composition is disclosed. The polymer is comprised of a polymer (A) having a sulfo and/or carboxy ammonium zwitterion structure and an organic synthetic polymer (B), wherein either of the following condition (i) or (ii) is satisfied: (i) (A) is a polymer having 0 to 80% by weight of the polyalkylene oxide component, and (ii) (A) is a copolymer having 80% by weight or more of the polyalkylene oxide component and (B) is a polymer comprising polyalkylene oxide as a copolymer component. The polymer composition can be used in the production of fibers, films and other shaped articles. The products utilizing the disclosed polymer composition have excellent hydrophilic properties which are maintained even after exposure to numerous washings.

Polymer compositions

Block copolymers of poly(N-formylethyleneimine) or poly(N-acetylethyleneimine) with poly(N-acylethyleneimine or poly(N-acylpropyleneimine) having a molecular weight of 500 to 50,000 and a method for their production. These block copolymers are useful as surface active agents.

Block copolymer

A process for producing a polymer having crosslinked structure, which comprises reacting a polymer having in the molecule a partial structure of the formula: ##STR1## with an oxazoline derivative of the general formula: ##STR2## wherein n is an integer of 1 to 4; R is an n-valent aromatic hydrocarbon radical; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are respectively the same or different hydrogen or alkyls having not more than 3 carbon atoms. The polymer shows an excellent adherence, and is of great industrial value as coatings, adhesives and molding materials with by far improved heat and solvent resistance.

Production of crosslinked polymers using an oxazoline derivative

A fluorine-containing polyester which comprises essentially as the constituting units (a) a group of the formula: ##STR1## wherein Rf is a perfluoroalkyl group having 8 to 21 carbon atoms and n is an integer of 0 or 1 and (b) a group of the formula: ##STR2## wherein R is one of the groups represented by the formulas: ##STR3## wherein R.sub.1 to R.sub.6 is each a hydrogen atom or a lower alkyl group, R.sub.1 and R.sub.3 being optionally combined together at the terminal carbon atoms to form a cyclic ring, X is a halogen atom or a lower alkyl group and m is an integer of 0 to 4, and is useful as a water and oil-repelling agent or a non-sticking agent.

Fluorine-containing polyesters, and their production and use

A fluorine-containing copolymer which comprises essentially as the constituting units (a) a group of the formula: ##STR1## wherein Rf is a perfluoroalkyl group having 3 to 21 carbon atoms and n is an integer of 0 or 1, (b) a group of the formula: ##STR2## wherein R is a residue obtained by eliminating a group: ##STR3## from a cyclic acid anhydride and (c) a group of the formula: ##STR4## wherein R' is a hydrogen atom, an alkyl group or an aryl group and m is an integer of 2 or 3, and is useful as a water and oil-repelling agent or a non-sticking agent.

Growing community of inventors

Kyoto, Japan

Takeo Saegusa