US 11,865,794 B2
Prepreg and method for manufacturing molded prepreg article
Akira Uchiyama, Joetsu (JP); Hiroshi Tanaka, Joetsu (JP); and Masaaki Hirai, Joetsu (JP)
Assigned to ARISAWA MFG. CO., LTD., Joetsu (JP)
Appl. No. 16/976,786
Filed by ARISAWA MFG. CO., LTD., Joetsu (JP); and Ikumi Uchiyama, Joetsu (JP)
PCT Filed Mar. 15, 2018, PCT No. PCT/JP2018/010174
§ 371(c)(1), (2) Date Aug. 31, 2020,
PCT Pub. No. WO2019/167288, PCT Pub. Date Sep. 6, 2019.
Claims priority of application No. 2018-037390 (JP), filed on Mar. 2, 2018.
Prior Publication US 2021/0040283 A1, Feb. 11, 2021
Int. Cl. B29C 70/22 (2006.01); C08J 5/24 (2006.01); B29K 63/00 (2006.01); B29K 75/00 (2006.01)
CPC B29C 70/22 (2013.01) [C08J 5/243 (2021.05); B29K 2063/00 (2013.01); B29K 2075/00 (2013.01); C08J 2371/12 (2013.01); C08J 2375/14 (2013.01); C08J 2471/12 (2013.01); C08J 2475/14 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A prepreg obtained by impregnating carbon fiber with a matrix resin comprising a mixture of a thermoplastic resin, a thermosetting resin, and a curing agent,
wherein the prepreg is characterized in that:
the thermoplastic resin is a phenoxy resin;
the thermosetting resin is a urethane acrylate resin;
the thermoplastic resin and the thermosetting resin are compounded in a mass ratio of 15:85-35:65 (thermoplastic resin/thermosetting resin);
the carbon fiber is a carbon cloth or a unidirectional fiber; and
the curing agent is formed so as to include a first peroxide, a second peroxide, and a third peroxide having different one-minute half-life temperatures, the one-minute half-life temperature of the second peroxide being 20-60° C. higher than that of the first peroxide, and the one-minute half-life temperature of the third peroxide being 10-40° C. higher than that of the second peroxide.