Patent ID: 9718954
Date: 2017-08-01
CPC Classifications: B29C,B29K,B82Y,C08J,C08K,C08L,C09D

Claim:
1. A resin system comprising a curable epoxy resin component and surface-modified nanoparticles dispersed in the resin component, wherein the surface-modified nanoparticles have a multimodal particle size distribution comprising a first mode having an average particle size of D1, wherein D1 is between 50 nanometers and 250 nanometers, inclusive, and a number of nanoparticles in the first mode, N1, and a second mode having an average particle size, D2, wherein D2 is less than D1, and a number of nanoparticles in the second mode, N2; wherein the ratio of D1 over D2 is greater than 1.5, and the ratio of N2 over N1 is greater than 0.5; wherein the average particle size and number of nanoparticles in a mode are measured according to the Transmission Electron Microscopy Procedure; wherein the resin system comprises at least 30 wt. % nanoparticles based on the total weight of the resin component and the nanoparticles, and a dispersion of the nanoparticles in the resin component has a complex viscosity of less than 60 Pa·s at 30° C. as measured according to the Rheology Test Procedure.