Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
71 words
In a resin composition comprising from about 70 to about 99 wt% of an epoxy resin composition and from about 1 to about 30 wt% of ex situ particles, wherein said particles have a median size between 5 and 75 microns the improvement wherein said particles are selected from the group consisting of elastomeric particles having a Tg below about 15 °C and mixtures of said elastomeric particles and inorganic particles.
Claim 2
Dependent Claim
16 words
The resin composition in accordance with claim 1 wherein said elastomeric particles comprise butadiene-acrylonitrile copolymer particles.
Claim 3
Dependent Claim
24 words
The resin composition in accordance with claim 2 wherein said elastomeric particles contain functionalities selected from the group consisting of carboxyl and amine functionality.
Claim 4
Dependent Claim
16 words
The resin composition in accordance with claim 1 wherein said inorganic particles are a mineral filler.
Claim 5
Dependent Claim
19 words
The resin composition of claim 1 wherein said particles are carboxylated butadiene-acrylonitrile copolymer particles reinforced with a mineral filler.
Claim 6
Dependent Claim
13 words
The resin composition of claim 1 wherein said inorganic particles comprise glass particles.
Claim 7
Dependent Claim
88 words
The resin composition in accordance with claim 1 wherein said epoxy resin composition comprise: about 100 parts by weight of an epoxy resin component having at least two epoxide groups per molecule; between about 5 and 100 parts by weight of a curing agent or mixture of curing agents; between about 10 and 70 parts by weight of a polymeric toughener selected from the group consisting of reactive aromatic oligomers and thermoplastics and mixtures thereof; and between about 0 and 10 parts by weight of a cure accelerator.
Claim 8
Dependent Claim
17 words
The resin composition of claim 7 wherein said curing agent comprises a mixture of 4,4'-diaminodiphenylsulfone and dicyandiamide.
Claim 9
Dependent Claim
17 words
The resin composition of claim 7 wherein said reactive oligomer comprises a terminally functional polyarylene polyether sulfone.
Claim 10
Dependent Claim
12 words
The resin composition of claim 7 wherein said thermoplastic is a polyethersulfone.
Claim 11
Dependent Claim
35 words
A prepreg useful in making damage tolerant structural composites, said prepreg comprising one or more high strength filament tows or bundles that is impregnated with the resin composition of any one of the preceding claims.
Claim 12
Dependent Claim
92 words
In a multi-layer damage tolerant, structural composite, said composite comprising: (a) a crosslinked epoxy matrix; (b) high strength filaments within said matrix in the form of tows or rovings that comprise a multitude of said filaments, said tows or rovings being in layers extending throughout said composite; and (c) ex situ particles, the improvement wherein said particles have a median size between 5 and 75 microns and are selected from the group consisting of elastomeric particles having a Tg below about 15 °C and mixtures of said elastomeric particles and inorganic particles.
Claim 13
Dependent Claim
13 words
The composite of claim 12 wherein said elastomeric particles comprise butadiene-acrylonitrile copolymer particles.
Claim 14
Dependent Claim
21 words
The composite of claim 13 wherein said elastomeric particles contain functionalities selected from the group consisting of carboxyl and amine functionality.
Claim 15
Dependent Claim
13 words
The composite of claim 12 wherein said inorganic particles are a mineral filler.
Claim 16
Dependent Claim
12 words
The composite of claim 12 wherein said inorganic particles comprise glass particles.