Patent ID: 11926129
Assignee: TORAY INDUSTRIES, INC.
Field: Surface technology, coating (Chemistry)
Classification: CPC B  D  C | IPC B  C

Claim 0:
1. A prepreg laminate comprising: a woven fabric prepreg arranged on at least one surface layer; and a discontinuous fiber prepreg arranged;
the woven fabric prepreg containing reinforcing fibers R1 having a woven structure, and a thermosetting resin composition A,
the discontinuous fiber prepreg containing unidirectionally oriented discontinuous reinforcing fibers R2 and a thermosetting resin composition B,
the thermosetting resin composition A and the thermosetting resin composition B, each comprising a thermosetting resin, a curing accelerator, a hardener, and a thermoplastic resin in amounts such that each of the thermosetting resin composition A and the thermosetting resin composition B satisfy the following calorific value condition:
calorific value condition: when each of the thermosetting resin composition A and the thermosetting resin composition B is heated using a differential scanning calorimeter from 50° C. to 130° C. at 700° C./min under a nitrogen atmosphere followed by retention at 130° C. until completion of thermal curing reaction,

Tb−Ta>150, wherein
Ta (s): time required for the calorific value of the thermosetting resin composition A to reach 50% of the gross calorific value of the thermosetting resin composition A;
Tb (s): time required for calorific value of the thermosetting resin composition B to reach 50% of gross calorific value of the thermosetting resin composition B,
wherein:
(i) the thermosetting resin composition A and the thermosetting resin composition B comprises different type of the curing accelerator, or
(ii) the thermosetting resin composition A and the thermosetting resin composition B comprises same type of the curing accelerator in a different content ratio to the thermosetting resin contained in each thermosetting resin composition.