Abstract:
A dispersant having excellent adsorption to hydrophobic particles and an ink composition comprising the dispersant are provided. The dispersant is a block copolymer comprising a hydrophilic moiety and a hydrophobic moiety having a hydrophobic substituent attached to a terminal end of the hydrophobic moiety.
Abstract:
A branched olefin copolymer comprises a branched building block containing polar functional groups and formed by radical polymerization reaction or anion polymerization reaction. A branched olefin copolymer comprises a building block A of formula (1) and a building block B of formula (2). -CH 2-CH(R 1>)- (1) [Image] R 1>H or 1-18C linear or branched aliphatic hydrocarbon; R 2>linear or branched aliphatic or aromatic hydrocarbon; F : heteroatom or heteroatom-containing linking group; Z : polymer segment containing O, N, halo, or aryl and having a molecular weight distribution of 1.0-3.0; W : alcoholic hydroxyl, phenolic hydroxyl, carboxylic acid, carboxylate, acid anhydride, amino, epoxy, siloxy, or mercapto; n : 1-3; m : 0-2. When n is 2 or 3, Z may be the same or different to each other. When m is 2, W may be the same or different to each other. W may be bound to the same or different atom of R 2>to form a cyclic structure. An independent claim is also included for a process for producing the branched olefin copolymer by sequentially conducting a step of synthesizing a polar group-containing olefin copolymer Q containing functional group G, preferably hydroxyl, carboxylic acid, ester, amino, epoxy, silanol, or acid anhydride; a step of converting the functional group G into a group having an ability to initiate radical polymerization; and a step of installing a polymer segment Z in the building block B in the branched olefin copolymer by radical polymerization of a monomer comprising a carbon-carbon double bond-containing compound R containing oxygen, nitrogen, halo or aryl.
Abstract:
PROBLEM TO BE SOLVED: To provide a means for inexpensively producing a fluorine-containing (meth)acrylic ester polymer without using special polymerization equipment. SOLUTION: A method for inexpensively producing the fluorine-containing (meth)acrylic ester polymer is carried out as follows. An acrylic or a methacrylic ester polymer is reacted with a fluorine-containing alcohol using a transesterification catalyst. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To develop a crosslinked polymer carrier for solid-phsae synthesis, which has functional groups accessible without its high swelling. SOLUTION: The crosslinked polymer, when: (i) functionalized with a 2-chlorotrityl chloride group; (ii) coupled with Leu to 0.65 mmol/g; and (iii) coupled with Glu(t-Bu); allows coupling of FMOC-Lys(BOC)-OH at an amount of 1.5 equivalents in the presence of 1.5 equivalents of HOBT, 1.5 equivalents of DIEA and 1.5 equivalents of HBTU, to be completed, as determined by the Kaiser test, in no more than 35 minutes. COPYRIGHT: (C)2004,JPO