Abstract:
PURPOSE: Provided are nano-sized metals or metal salts thereof stabilized by semi-telechelic or telechelic polymers obtained by living anionic polymerization, which has excellent stability in air and forms a nano-structure by simply mixing with a block copolymer. CONSTITUTION: The nano-sized metal particles or metal salts thereof present in a polymer matrix having a functional group at the end of the polymer chain and a molecular weight of 1000-10000, is stable in air, and is represented by the formula selected from the group consisting of the following formulae 1-5, wherein each of R1 and R2 is H, methyl or t-butyl; each of X1 and X2 is independently a carboxyl, hydroxyl, sulfonate, anhydride or thiol group; n is an integer of 10-5000; each of R3 and R4 is H or methyl; each of X2 and X3 is independently a hydroxyl, carboxyl, sulfonate, thiol, amine, tertiary amine or anhydride group; m is an integer of 20-10000; X4 is a hydroxyl, amine or tertiary amine group; Y2 is a hydroxyl, carboxyl, sulfonate, thiol, amine, tertiary amine or anhydride group; A1 is a styrene monomer; B1 is a methyl methacrylate, vinylpyridine or diene monomer; and each of o and p is an integer of 10-5000.
Abstract:
PURPOSE: A method for preparing a polystyrene grafted copolymer having a functional group is provided, to allow various functional groups to be introduced into the side chain of a syndiotactic polystyrene, thereby preparing the polymer with improved strength and processability. CONSTITUTION: The method comprises the steps of: protecting a functional group of a benzophenol derivative with a silane protecting group and methylating it to obtain a diphenylethylene derivative; reacting the diphenylethylene derivative with an alkyl alkali metal initiator quantitatively, and polymerizing the obtained one with styrene and/or a diene-based monomer in a non-polar solvent or a non-polar/polar solvent mixture, to obtain a styrene and/or diene living polymer having a functional group; reacting the living polymer with 4-chloromethylstyrene to obtain a styrene and/or diene-chained a styrene macromonomer having a functional group; and copolymerizing the macromonomer and styrene monomer by using a titanocene catalyst system, to obtain a polystyrene grafted copolymer. The macromonomer is represented by the formula 5 or 6. In the formula 5, R is a normal butyl group or a secondary butyl group; R1 is H, -CH3, -OCH3, -N(CH3)2, -OSi(t-C4H9)(CH3)2, -N(Si(CH3)3)2 or -C(CH3); X1 and X2 are independent each other, are H, -OCH3, -N(CH3)2, -OSi(t-C4H9)(CH3)2 or -N(Si(CH3)3)2, and are not H simultaneously; and n is a degree of polymerization and is an integer of 5-100. In the formula 6, R is a normal butyl group or a secondary butyl group; R1 is H or -CH3; X1 and X2 are independent each other, are H, -OCH3, -N(CH3)2, -OSi(t-C4H9)(CH3)2 or -N(Si(CH3)3)2, and are not H simultaneously; and m and n are a degree of polymerization and are an integer of 5-100.
Abstract:
본 발명은 이소택틱 인텍스가 96% 이상인 폴리프로필렌 수지에 가공조제와 기핵제를 동시에 배합한 폴리프로필렌 수지를 시트 또는 필름상으로 용융압축하고 냉각 드럼 또는 냉각 수조에서 급랭한 후 얻어진 미배향 시트 또는 필름을 종방향으로 2단계 연신방법을 통해 5.80-8.00배 연신하고 이어서 횡방향으로 7.50-10.0배 연신하는 것으로 이루어진 축차 이축연신 폴리프로필렌 필름의 연속 제조방법을 제시한다. 본 발명에 따라 제조된 폴리프로필렌 필름은 종방향 인장 강도가 20㎏/㎜2 이상이며, 특수 테이프용, 전선 초벌 감기용, 골프채 및 자전거 삼각대 제조용 필름 등으로 이용될 수 있다.
Abstract:
본 발명은 이소택틱 인덱스가 96% 이상인 폴리프로필렌 수지에 가공조제와 기핵제를 동시에 배합한 폴리프로필렌 수지를 시트 또는 필름상으로 용융압축하고 냉각 드럼 또는 냉각 수조에서 급랭한 후 얻어진 미배향 시트 또는 필름을 중방향으로 2단계 연신방법을 통해 5.80~8.00배 연신하고 이어서 횡방향으로 7.50~10.0배 연신하는 것으로 이루어진 축차 이축연신 폴리프로필렌 필름의 연속 제조방법을 제시한다. 본 발명에 따라 제조된 폴리프로필렌 필름은 종방향 인장 강도가 20kg/mm 2 이상이며, 특수 테이프용, 전선 초벌 감지용, 골프채 및 자전거 삼각대 제조용 필름 등으로 이용될 수 있다.
Abstract:
The fluoroalkyl contg. monomer is prepd. by reacting fluoroalkyl carboxylic acid or fluoroalkyl carboxyl halide or fluoroalkyl sulfonic acid or fluoroalkyl sulfonyl halide, with the acrylic monomer comprising hydroxyl gp. and amine gp., or the styrenic monomer comprising hydroxyl gp. or amine gp., or the vinylether type monomer. The polymer usful for preparing a contact lens having good oxygen permeability is prepd. by (co)polymerising 5-100 wt.% of the obtd. fluoroalkyl contg. monomer, 0-60 wt.% of silicone contg. monomer, 0-60 wt.% of vinyl based monomer, 0-10 wt.% of crosslinking monomer, and/or 0-5 wt.% of hydrophilic monomer.
Abstract:
The molding compsn. for the liquid crystal composite in situ composite comprises 60-80 wt.% of polyphenylene sulfide; 5-10 wt.% of thermotropic liquid crystal polymer; and 15-30 wt.% of polysulfone. The molding product is prepared by injection molding the obtd. compsn., and then the composite fiber is prepared from the obtd. compsn. Pref. the obtd. compsn. can be melt-extruded at 285-290 deg.C or melt-injection molded at 320-350 deg.C. Pref. the thermotropic liquid crystal polymer is condensed to comprise 70 wt.% of 2,6-hydroxy naphthoic acid and 30 wt.% of hydroxy benzoic acid.
Abstract:
The urethane coating agent is prepd. by (a) reacting aliphatic diisocyanate with polyol and bisphenol A 10-50% (to total solids) and MDA 0.5-1% (to total solids) in lower b.p. solvent, (b) neutralizing with acid and (c) distg. off solvent. Thus, e.g. vacuum dry polypropyleneglycole (mw ca 2000) and polyethertriol (mw ca 3000) for 30 min at 100 deg.C, put dried polyols, bisphenol A, 1,6-hexanediol, MDA, methylethylketone (MEK) and hexamethylenediisocyanate into reactor and react them for 4hr at 70 deg. C, neutralize with HCl and add water with stirring, and distg. off MEK to give coating agent.
Abstract translation:制备聚氨酯涂料 通过(a)使脂族二异氰酸酯与多元醇和双酚A与总摩尔数相比为10-50%(总固体)和MDA为0.5-1%(总固体)的较低沸点。 溶剂,(b)用酸中和,(c)distg。 关闭溶剂。 因此,例如 在100℃下真空干燥聚丙二醇(mw ca 2000)和聚醚三醇(mw ca 3000)30分钟,将干燥的多元醇,双酚A,1,6-己二醇,MDA,甲基乙基酮(MEK)和六亚甲基二异氰酸酯加入反应器中, 在70度下4小时。 C,用HCl中和,搅拌加水, 关闭MEK给予涂层剂。