摘要:
To provide a filler-containing PTFE granular powder for molding, which has a high apparent density, a small electrostatic charge and excellent flowability and gives a molded article which is free from lowering of tensile strength and elongation and coloring attributable to a surfactant. Also a process for preparing the granular powder is provided. The granulation is carried out by wetting 100 parts by weight of a mixture of a PTFE powder and filler with 30 to 60 parts by weight of an aqueous solution containing an anionic surfactant in a concentration of not less than 10 times and less than 40 times the critical micelle concentration and then applying mechanical force to the mixture.
摘要:
To provide the water-repellent coating film having excellent transparency, abrasion resistance, weather resistance and water repellency, the method for producing the coating film, the multi-functional composite material provided with the coating film and the coating composition used therefor which has excellent dispersion stability. The coating composition comprises (A) the fluorine-containing ethylenic polymer prepared by copolymerizing a fluorine-containing ethylenic monomer having at least one functional group selected from hydroxyl, carboxyl, a carboxylic salt group, a carboxylic ester group and epoxy, (B-1) the metal oxide sol, and (C) the solvent.
摘要:
Novel silicon-containing organic fluoropolymers which are appliable to materials over a wide range and which have excellent antifouling property. The silicon-containing organic fluoropolymer of the invention is represented by the general formula and has a number average molecular weight of from 5×102 to 1×105: wherein Rf represents perfluoroalkyl; Z represents fluoro or trifluoromethyl; a, b, c, d and e each independently represent 0 or an integer of 1 or above, provided that a+b+c+d+e is not less than 1 and the order of the repeating units parenthesized by subscripts a, b, c, d and e occurring in the formula is not limited to that shown; Y represents hydrogen or alkyl containing 1 to 4 carbon atoms; X represents hydrogen, bromo or iodo; R1 represents hydroxy or a hydrolyzable substituent group; R2 represents hydrogen or a monovalent hydrocarbon group; 1 represents 0, 1 or 2; m represents 1, 2 or 3; and n represents an integer of 2 or above.
摘要翻译:新型含硅有机含氟聚合物,适用于广泛范围的材料,具有优异的防污性能。 本发明的含硅有机含氟聚合物由通式表示,数均分子量为5×102〜1×105,式中Rf表示全氟烷基; Z表示氟或三氟甲基; a,b,c,d和e各自独立地表示0或1以上的整数,条件是a + b + c + d + e不小于1,并且由下标a,b括号的重复单元的顺序 ,c,d和e不限于所示; Y表示氢或含有1至4个碳原子的烷基; X表示氢,溴或碘; R1表示羟基或可水解取代基; R2表示氢或一价烃基; 1表示0,1或2; m表示1,2或3; n表示2以上的整数。
摘要:
To provide a polytetrafluoroethylene granular powder for molding and a process for preparing the granular powder, in which the granular powder contains only a small number of coarse particles, is obtained with good tumbling efficiency and further no organic liquid is required to be used. The process is for preparing a polytetrafluoroethylene granular powder for molding by granulating a polytetrafluoroethylene powder through tumbling with a granulator having a rotating inclined disc and a rotating side plate; characterized in that the granulator:(1) comprises a disc inclined to a horizontal level and a side plate provided on the periphery of the disc,(2) has the side plate assembled in one unit with the disc and rotating together, and(3) is equipped with an agitator positioned eccentrically to the center of a vortex of the polytetrafluoroethylene powder which is caused by tumbling,or the granulator:(1) comprises a disc inclined to a horizontal level and a side plate provided on the periphery of the disc,(2) has the side plate separated from the disc and being rotatable around the periphery of the disc, and(3) is equipped with an agitator positioned eccentrically to the center of a vortex of the polytetrafluoroethylene powder which is caused by tumbling,and that the granulation is carried out by tumbling the polytetrafluoroethylene powder wetted with an aqueous solution containing a surfactant.
摘要:
A thermoplastic resin composition comprising (i) 5 to 80% by weight of a polyamide resin, (ii) 15 to 90% by weight of a fluororesin and (iii) 1 to 80% by weight of a fluororubber having a tensile modulus at ordinary temperature of not more than 500 Kg/cm.sup.2, and a laminated material having a layer formed from the thermoplastic resin composition have excellent chemical resistance.
摘要:
A thermoplastic resin composition comprising a blend obtainable by blending 0.1 to 99% by weight of (a) a fluorine-containing polymer having a number-average molecular weight of 2000 to 1000000 and having hydroxy group or epoxy group at least at one of end portions of a main chain and side chain of the polymer, and 1 to 99.9% by weight of (b) a heat resisting thermoplastic resin having a crystalline melting point or glass transition temperature of not less than 150.degree. C. The present invention can provide a composition comprising various heat resisting thermoplastic resins and a fluorine-containing polymer having a functional group which is capable of developing an affinity with said resins and forming a uniform dispersion.
摘要:
To provide a fluorine-containing olefin represented, for example, by CH.sub.2 .dbd.CFCF.sub.2 --R.sub.f.sup.6 --(CH.sub.2).sub.k --X.sup.2 �wherein, X.sup.2 is --CH.sub.2 OH, ##STR1## or ##STR2## R.sub.f.sup.6 is a fluorine-substituted fluorine-containing alkyl group having 1 to 40 carbon atoms or --OR.sub.f.sup.7 -- (Rf.sup.7 is a fluorine-substituted fluorine-containing alkyl group having 1 to 40 carbon atoms or a fluorine-substituted fluorine-containing ether group having 3 to 50 carbon atoms), k is 0 or an integer of 1 to 6!; a fluorine-containing polymer with functional group which is prepared by polymerizing the above-mentioned olefin, has good affinity with various heat-resisting thermoplastic resins and is capable of forming homogeneous dispersion with the thermoplastic resin; and a thermoplastic resin composition comprising the above-mentioned fluorine-containing polymer with functional group and an aromatic polyester or the like as the heat-resisting thermoplastic resin.
摘要:
A method of cooking edible foods by heating the foods on an electromagnetic cooker cover plate, formed by molding using a composition comprising a wholly aromatic, liquid crystalline polyester and a filler, said composition having a heat deformation temperature of not lower than 200.degree. C. at a load of 18.5 kg/cm.sup.2.
摘要:
The invention is an improved platelet storage method and composition. Medium for the storage of platelets for transfusion comprising acetate or an acetate-like compound and phosphate is disclosed.
摘要:
The invention is an improved platelet storage method and composition. Medium for the storage of platelets for transfusion comprising acetate or an acetate-like compound and phosphate is disclosed.