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US 9,187,636 B2Granted
Composite material with polyamide particle mixtures
AssigneeHexcel Corporation
InventorsYen-Seine Wang, Maureen Boyle
Life of this patent
Estimating the term…
Abstract
Pre-impregnated composite material (prepreg) is provided that can be cured/molded to form composite parts having high damage tolerance and interlaminar fracture toughness. The matrix resin includes a thermoplastic particle component that includes a mixture of polyamide 12 particles and polyamide 11 particles.
Claims20
A pre-impregnated composite material comprising:
- A) a carbon tow which comprises from 10,000 to 14,000 carbon filaments wherein the weight per length of said carbon tow is from 0.2 to 0.6 g/m and wherein the tensile strength of the carbon tow is from 750 to 860 ksi and the tensile modulus of the carbon tow is from 35 to 45 Msi;
- and
- B) an uncured resin matrix comprising:
- a) from 15 wt % to 19 wt % diglycidyl ether of Bisphenol F, based on the total weight of said uncured resin matrix;
- b) from 24 wt % to 28 wt % triglycidyl meta-aminophenol, based on the total weight of said uncured resin matrix;
- c) from 8 wt % to 13 wt % tetrafunctional para-glycidyl amine, based on the total weight of said uncured resin matrix;
- d) a thermoplastic particle component comprising a mixture of polyamide 12 particles and polyamide 11 particles, said thermoplastic particle component being present in the range of 5 wt % to 20 wt %, based on the total weight of said uncured resin matrix, and wherein the weight ratio of polyamide 12 particles to polyamide 11 particles ranges from 1:1 to 1.5:1;
- e) a thermoplastic toughening agent selected from the group consisting of polyethersulfone and polysulfone, said thermoplastic toughening agent being present in the range of 13 wt % to 18 wt %, based on the total weight of said uncured resin matrix;
- and
- f) a curing agent to provide curing of said uncured resin matrix wherein said prepreg, when cured, has a G1c of 3.6 when tested in accordance with BSS7320.
7 more elements
A method for making a pre-impregnated composite material, said method comprising the steps of:
- A) providing a carbon tow which comprises from 10,000 to 14,000 carbon filaments wherein the weight per length of said carbon tow is from 0.2 to 0.6 g/m and wherein the tensile strength of the carbon tow is from 750 to 860 ksi and the tensile modulus of the carbon tow is from 35 to 45 Msi;
- and
- B) impregnating said carbon tow with an uncured resin matrix which comprises:
- a) from 15 wt % to 19 wt % diglycidyl ether of Bisphenol F, based on the total weight of said uncured resin matrix;
- b) from 24 wt % to 28 wt % triglycidyl meta-aminophenol, based on the total weight of said uncured resin matrix;
- c) from 8 wt % to 13 wt % tetrafunctional para-glycidyl amine, based on the total weight of said uncured resin matrix;
- d) a thermoplastic particle component comprising a mixture of polyamide 12 particles and polyamide 11 particles, said thermoplastic particle component being present in the range of 5 wt % to 20 wt %, based on the total weight of said uncured resin matrix, and wherein the weight ratio of polyamide 12 particles to polyamide 11 particles ranges from 1:1 to 1.5:1;
- e) a thermoplastic toughening agent selected from the group consisting of polyethersulfone and polysulfone, said thermoplastic toughening agent being present in the range of 13 wt % to 18 wt %, based on the total weight of said uncured resin matrix;
- and
- f) a curing agent to provide curing of said uncured resin matrix wherein said prepreg, when cured, has a G1c of 3.6 when tested in accordance with BSS7320.
7 more elements
Dependencies are inferred from the claim text.