프리프레그 및 성형품

• Main Authors: SHINCHI TOMOAKI, KIMURA MAKOTO, YASUMURA TAKASHI
• Format: Patent
• Language: Korean
• Published: 31.08.2018
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

평균 수산기수 1.8∼2.6의 에폭시(메타)아크릴레이트(a1)와 평균 이소시아네이트기수 2∼3의 폴리이소시아네이트(a2)와의 반응물인 우레탄 변성 에폭시(메타)아크릴레이트(A)와, 에틸렌성 불포화 단량체(B)와, 중합개시제(C)와, 강화 섬유(D)를 필수 성분으로 하는 프리프레그로서, 상기 폴리이소시아네이트(a2)의 이소시아네이트기(NCO)와 상기 에폭시(메타)아크릴레이트(a1)의 수산기(OH)와의 몰비(NCO/OH)가 0.6∼1.1이고, 상기 에폭시(메타)아크릴레이트(a1)와 상기 에틸렌성 불포화 단량체(B)와의 총질량 중의 상기 에틸렌성 불포화 단량체(B)의 비율이 10∼50질량%인 것을 특징으로 하는 프리프레그를 제공한다. 이 프리프레그는, 작업성 및 성형성이 우수하고, 층간 전단 강도, 내열성도 등의 각종 물성이 우수하므로, 자동차 부재 등의 각종 성형품에 호적하게 사용할 수 있다. Provided is a prepreg containing a urethane-modified epoxy (meth)acrylate (A) that is a reaction product of an epoxy (meth)acrylate (a1) having an average of 1.8 to 2.6 hydroxy groups and a polyisocyanate (a2) having an average of 2 to 3 isocyanate groups, an ethylenically unsaturated monomer (B), a polymerization initiator (C), and reinforcing fibers (D) as essential components, in which the molar ratio (NCO/OH) of isocyanate groups (NCO) in the polyisocyanate (a2) to hydroxy groups in the epoxy (meth)acrylate (a1) is 0.6 to 1.1, and the proportion of the ethylenically unsaturated monomer (B) in the total mass of the epoxy (meth)acrylate (a1) and the ethylenically unsaturated monomer (B) is 10% to 50% by mass. The prepreg has good workability and good moldability and can be appropriately used for various molded articles such as automotive members because various excellent physical properties such as interlaminar shear strength and heat resistance are provided.