Uncured laminate, reinforcing fiber composite material, method for producing uncured laminate, and method for producing reinforcing fiber composite material
AssigneeKaneka Corporation
InventorsYoshio Furukawa, Yutaka Kaneda
Life of this patent
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Abstract
A layered body which allows a reduction in residual volatile component and a method for producing the layered body. A reinforcing fiber composite material which has high heat resistance and superior mechanical strength and a method for producing the reinforcing fiber composite material. A method includes fusing together a plurality of layers each of which contains: a powder of an imide oligomer represented by a specific general formula; and reinforcement fibers.
Claims13
An uncured layered plate comprises:
- a plurality of layers fused together, the plurality of layers each comprising reinforcement fibers and a powder of an imide oligomer represented by formula (1):
- wherein:
- R1 represents a divalent residue of at least one aromatic diamine selected from 2-phenyl-4,4′-diaminodiphenylether, 9,9-bis(4-aminophenyl)fluorene, 9,9-bis(4-(4-aminophenoxy)phenyl)fluorene, 1,3-diaminobenzene, and 4-phenoxy-1,3-diaminobenzene;
- R2 represents a divalent residue of at least one aromatic diamine selected from 9,9-bis(4-aminophenyl)fluorene, 1,3-9,9-bis(4-(4-aminophenoxy)phenyl)fluorene, diaminobenzene, and 4-phenoxy-1,3-diaminobenzene;
- R3 and R4, which are identical to each other or different from each other, each represents a tetravalent residue of an aromatic tetracarboxylic acid;
- one of R5 and R6 represents a phenyl group, and the other one of R5 and R6 represents a hydrogen atom;
- m and n satisfy the following:
- 1≤m,
- 0≤n≤5,
- 1≤m+n≤10, and
- 0.5≤ m/(m+n)≤ 1;
- and
- a sequence of repeating units may be a block sequence or a random sequence.
A method for producing an uncured layered plate, the method comprising:
- mixing a powder of an imide oligomer with reinforcement fibers to obtain a layer;
- stacking a plurality of the layers;
- and
- heating at a temperature at which the plurality of the layers after stacking are fused together but are not completely cured.
A method for producing a reinforcing fiber composite material, the method comprising:
- (a) producing uncured layered plates each by (a-1) stacking a plurality of layers each of which is obtained by causing a powder of an imide oligomer to adhere to reinforcement fibers and then (a-2) heating at a temperature at which the plurality of layers fuse together but are not cured;
- (b) obtaining a layered body by (b-1) stacking the uncured layered plates obtained in the step (a) and then (b-2) keeping the layered body at 260° C. to 340° C. and 0.1 MPa to 20 MPa for 5 minutes to 300 minutes;
- and
- (c) further keeping the layered body at 330° C. to 500° C. and 0.1 MPa to 20 MPa for 15 minutes to 120 minutes.
Dependencies are inferred from the claim text.