Anhydride-based fortifiers for anhydride-cured epoxy resins

Details Anhydride-based fortifiers for anhydride-cured epoxy resins Anhydride-based fortifiers for anhydride-cured epoxy resins

1988-03-03

1989-07-25

Nielsen, Earl

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525423, 528113, 528341, 528363, C08G 5948

Patent

active

048514845

ABSTRACT:
An anhydride-cured epoxy resin (epoxy resin+anhydride curing agent+catalyst) may be fortified (i.e. increased in strength and modulus without being made brittle) by the addition of a carboxylic acid and the reaction product of a carboxylic acid anhydride and a substituted aromatic amine. Strengths as high as 125 MPa and moduli as high as 3500 MPa have been attained, as well as elongations up to 6% and an increase in the ability of the plastic to yield before fracture (ductility), compared to 80 MPa strength, 3000 MPa modulus and 2.4% elongation for the unfortified system (strengths and moduli are tensile).

REFERENCES:
patent: 2955101 (1960-10-01), Bruin et al.
patent: 2970972 (1961-02-01), Wear et al.
patent: 3639657 (1972-02-01), Moran et al.
patent: 4212959 (1980-07-01), Fukami et al.
patent: 4668757 (1987-05-01), Nichols
patent: 4673723 (1987-06-01), Cuzin

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