US 12,241,200 B2
Sizing agent composition for fibers, fiber bundle, fiber product and composite material
Sayaka Sakaguchi, Kyoto (JP); and Takuya Hosogi, Kyoto (JP)
Assigned to SANYO CHEMICAL INDUSTRIES, LTD., Kyoto (JP)
Appl. No. 17/263,405
Filed by SANYO CHEMICAL INDUSTRIES, LTD., Kyoto (JP)
PCT Filed Jul. 30, 2019, PCT No. PCT/JP2019/029825
§ 371(c)(1), (2) Date Jan. 26, 2021,
PCT Pub. No. WO2020/027126, PCT Pub. Date Feb. 6, 2020.
Claims priority of application No. 2018-146068 (JP), filed on Aug. 2, 2018.
Prior Publication US 2021/0156079 A1, May 27, 2021
Int. Cl. D06M 15/55 (2006.01); D06M 15/27 (2006.01); D06M 15/507 (2006.01)
CPC D06M 15/55 (2013.01) [D06M 15/27 (2013.01); D06M 15/507 (2013.01); D06M 2200/40 (2013.01)] 15 Claims
 
1. A fiber sizing agent composition (C) comprising:
an epoxy resin (A) having an aromatic ring and not having a (meth) acryloyl group;
a (meth) acrylate (B), and
a polyester resin (D) having a bisphenol skeleton and a polyoxyethylene chain, and comprising, as constituent monomers, a C8-C14 aromatic dicarboxylic acid or its anhydride and a diol having a bisphenol skeleton and a polyoxyethylene chain,
wherein the (meth) acrylate (B) is a (meth) acrylate (B1) not having an oxyalkylene group or a (meth) acrylate (B2) having an oxyalkylene group, and
when the (meth) acrylate (B1) is a bifunctional (meth) acrylate (B11), the bifunctional (meth) acrylate (B11) is at least one selected from the group consisting of (i) a non-aromatic di- esterified product of a C2-C20 di-to octahydric alcohol and (meth) acrylic acid, and (ii) a di- esterified product of a diglycidyl ether of a dihydric phenol and methacrylic acid; and
when the (meth) acrylate (B2) is a bifunctional (meth) acrylate (B21), the bifunctional (meth) acrylate (B21) is at least one selected from the group consisting of (i) a di-esterified product of an adduct of AO with a di-to octahydric alcohol and (meth) acrylic acid, (ii) a di-esterified product of an adduct of AO with a dihydric phenol and (meth) acrylic acid, and (iii) an epoxy acrylate that is a reaction product of a diglycidyl ether of an adduct of AO with a dihydric alcohol or a dihydric phenol and acrylic acid, and
wherein a weight ratio (epoxy resin (A)/(meth) acrylate (B)) of the epoxy resin (A) having an aromatic ring and not having a (meth) acryloyl group to the (meth) acrylate (B) is 10/90 to 90/10.