Molding method for fiber-reinforced plastic structure, and vehicle wheel

    公开(公告)号:US10532498B2

    公开(公告)日:2020-01-14

    申请号:US14406768

    申请日:2013-06-11

    摘要: The present invention applies to a molding method for a fiber-reinforced plastic structure having an internal cavity. Firstly, grain groups, which mainly consist of a plurality of high-rigidity grains, are accommodated in bags, and a plurality of cores are formed. A reinforcing fiber substrate, is placed between the plurality of adjacent cores so as to be interposed therebetween. For example, a plurality of molding base materials are prepared by surrounding each core with a prepreg, and the plurality of molding base materials are combined and placed inside a molding die, and the molding base materials are compression molded. When compression molding, a part of the outer surface of the cores is locally pressurized, and the internal pressure of the cores is increased, changing the shape thereof, thus eliminating voids that are present between the cores and the prepreg and/or the prepreg and the molding surface of the die.

    Copolymer for semiconductor lithography, resist composition, and method for manufacturing substrate

    公开(公告)号:US10336851B2

    公开(公告)日:2019-07-02

    申请号:US14912798

    申请日:2014-09-03

    摘要: A copolymer for lithography having a turbidity Th(80) of 1.0 NTU or more and 4.6 NTU or less and a turbidity Tm(80) of 1.0 NTU or more and 3.8 NTU or less, in which this turbidity Th(80) is a turbidity of a PGMEA solution when n-heptane in an amount to be 80% of (X)h is added to this PGMEA solution where (X)h denotes an amount of n-heptane added to have a turbidity of 10 NTU when n-heptane is added to the PGMEA solution containing this copolymer for lithography at 20 wt % with respect to a total mass of this PGMEA solution; and this turbidity Tm(80) is a turbidity of a PGMEA solution when methanol in an amount to be 80% of (X)m is added to this PGMEA solution where (X)m denotes an amount of methanol added to have a turbidity of 5.0 NTU when methanol is added to this PGMEA solution containing this copolymer for lithography at 20 wt % with respect to a total mass of this PGMEA solution.

    Method for producing 3-chloro-2-hydroxypropyl (meth)acrylate and method for producing glycidyl (meth)acrylate

    公开(公告)号:US10087159B2

    公开(公告)日:2018-10-02

    申请号:US15509558

    申请日:2015-08-04

    IPC分类号: C07D301/16 C07C67/26

    摘要: To reduce formation of side products and to enhance a selectivity rate in a method for producing 3-chloro-2-hydroxypropyl (meth)acrylate and in a method for producing glycidyl (meth)acrylate.The present invention is characterized by a method for producing 3-chloro-2-hydroxypropyl (meth)acrylate through a reaction of (meth)acrylic acid and epichlorohydrin; more specifically, the reaction is carried out by using 0.5 to 2 mol of epichlorohydrin relative to 1 mol of (meth)acrylic acid, and by adding epichlorohydrin to (meth)acrylic acid in the presence of a catalyst. Also, the present invention is characterized by a method for producing glycidyl (meth)acrylate through a reaction of 3-chloro-2-hydroxypropyl (meth)acrylate and a basic carbonate compound in a polar solvent.