摘要:
There is provided a polymer composition having improved discoloration resistance upon exposure to light comprising a polyphenylene ether, a polyamide, and a combination of (a), a inorganic filler selected from the group consisting of titanium oxide, zinc oxide, zinc sulfide, aluminum oxide, magnesium oxide, titanium oxide coated mica, and metal particles, and (b), an organic dye or pigment which bleaches upon exposure to light, in an amount effective to improve the discoloration resistance.
摘要:
A thermoplastic resin composition having a good balance among rigidity, impact strength and adhesion of coating is provided, which comprises:a total of 100 parts by weight of (a)-(c) wherein (a) is 1-60% by weight of a polyphenylene ether, (b) 0-60% by weight of an alkenyl aromatic resin excluding unhydrogenated alkenyl aromatic block copolymer of tile following component (e) and (c) 40-99% by weight of a polyamide,(d) 1-50 parts by weight of a polyolefin having a modulus of 10000 kg/cm2 or more at room temperature,(e) 1-50 parts by weight of an unhydrogenated alkenyl aromatic block copolymer, and(f) a compatibilizing agent in an amount necessary to improve compatibility of the above components (a) and (c), said (d)-(f) being every 100 parts by weight of (a)-(c), and wherein the thermoplastic resin composition is obtained by melt kneading firstly said (a), (d) and (f) and then secondly said (c) therewith.
摘要:
A resin composition having improved resistance to discoloration by sunlight comprising (A) a polymer mixture which comprises a polyphenylene ether, a polyamide and optionally a polystyrene and/or an agent to improve the impact resistance, and (B) an inorganic powder whose mean particle size is less than or equql to 5 micrometer, in an amount of more than or equal to 15 parts by weight based on 100 parts by weight of the polyphenylene ether in the polymer mixture (A), which is selected from the group consisting of titanium oxide, mica coated with titanium oxide, barium sulphate, zinc oxide and zinc sulfide.
摘要:
An air battery having a main body including a container package member, an electrolytic solution contained in the container package member, a cathode having a cathode catalyst that is in contact with the electrolytic solution, and an anode that is in contact with the electrolytic solution; a tank storing the electrolytic solution; a pump circulating the electrolytic solution between the main body and the tank; an oxygen intake incorporating oxygen into the electrolytic solution in the way of circulation of the electrolytic solution; and a pipe arrangement connecting the tank, the pump, the oxygen intake and the main body so that the electrolytic solution circulates in the order thus named, wherein the oxygen intake has an oxygen selective permeable membrane.
摘要:
Disclosed are processes for producing polypropylene resin compositions including two or three sorts of propylene-based polymeric materials, the processes including a first step of melt-kneading at least a propylene-α-olefin block copolymer containing a polymer portion composed mainly of propylene and a propylene-α-olefin copolymer portion having a relatively high intrinsic viscosity and a second step of melt-kneading the product of the first step with a propylene-ethylene block copolymer containing a polymer portion composed mainly of propylene and a propylene-ethylene copolymer portion having a relatively low intrinsic viscosity or a polymer portion composed mainly of propylene having a relatively low intrinsic viscosity. In the composition produced by these processes, no or substantially no fish eyes develop.
摘要:
A propylene-ethylene-butene block copolymer is provided which includes from 60 to 85% by weight of a polypropylene portion and from 15 to 40% by weight of a propylene-ethylene-butene random copolymer portion, wherein the copolymer satisfies the requirements (1) and (2) given below. In addition, a molded article including such a propylene-ethylene-butene block copolymer is provided.(1) The random copolymer portion includes a propylene-ethylene random copolymer component (EP) and a propylene-ethylene-butene random copolymer component (EPB) and the copolymer component (EP) has an intrinsic viscosity of from 1.5 to 8 dl/g and an ethylene unit content of from 20 to 50% by weight, and the copolymer component (EPB) has an intrinsic viscosity of from 0.5 to 8 dl/g, an ethylene unit content of from 47 to 77% by weight and a butene unit component of from 3 to 33% by weight and the total of the ethylene unit content and the butene unit content is from 50 to 80% by weight.(2): The propylene-ethylene-butene block copolymer has a melt flow rate of from 5 to 120 g/10 min.
摘要:
A vertical articulated robot includes a base; a turning base provided on the base so as to be pivotable about a first rotation axis; a first upper arm provided on the turning base so as to be turnable about a second rotation axis that is in a plane perpendicular to the first rotation axis; a second upper arm provided on a distal end portion of the first upper arm so as to be pivotable about a third rotation axis that is perpendicular to the second rotation axis; a front arm provided on a distal end portion of the second upper arm so as to be turnable about a fourth rotation axis that is in a plane perpendicular to the third rotation axis; and a wrist assembly mounted on a distal end portion of the front arm. A motor that rotates the second upper arm is mounted on a frame of the second upper arm.
摘要:
Disclosed are processes for producing polypropylene resin compositions including two or three sorts of propylene-based polymeric materials, the processes including a first step of melt-kneading at least a propylene-α-olefin block copolymer containing a polymer portion composed mainly of propylene and a propylene-α-olefin copolymer portion having a relatively high intrinsic viscosity and a second step of melt-kneading the product of the first step with a propylene-ethylene block copolymer containing a polymer portion composed mainly of propylene and a propylene-ethylene copolymer portion having a relatively low intrinsic viscosity or a polymer portion composed mainly of propylene having a relatively low intrinsic viscosity. In the composition produced by these processes, no or substantially no fish eyes develop.
摘要:
A propylene-ethylene block copolymer comprising from 60 to 85% by weight of a polypropylene portion and from 15 to 40% by weight of a propylene-ethylene random copolymer portion and satisfying the requirements (1) and (2) defined below is provided. In addition, a molded article containing such a propylene-ethylene block copolymer is provided.Requirement (1): the propylene-ethylene random copolymer portion comprises a propylene-ethylene random copolymer component (EP-A) and a propylene-ethylene random copolymer component (EP-B), the copolymer component (EP-A) having an intrinsic viscosity of not less than 4 dl/g but less than 8 dl/g and an ethylene content of from 20 to 60% by weight, and the copolymer component (EP-B) having an intrinsic viscosity of not less than 0.5 dl/g but less than 3 dl/g and an ethylene content of from 40 to 80% by weight.Requirement (2): the propylene-ethylene block has a melt flow rate of from 5 to 120 g/10 min.
摘要:
There is provided a process for producing a modified polypropylene resin, which comprises the steps of mixing the following components (A) to (D), and reacting them with one another: (A) 100 parts by weight of a polypropylene resin, (B) 0.1 to 30 parts by weight of a compound having a bond or a functional group selected from the group consisting of a non-aromatic carbon-carbon multiple bond, an oxirane group and a derived carboxyl group, (C) 0.001 to 30 parts by weight of a compound having at least two functional groups reactive to a carboxyl group, and (D) 0.01 to 20 parts by weight of an organic peroxide having a decomposition temperature of from 50 to 120° C., at which temperature a half-life of the organic peroxide is 1 minute.