Patent ID: 8802791

Claim:
A phenol formaldehyde crosslinked by a polythiol group, further comprising an epoxy acrylate, wherein the polythiol group is selected from trimethylolpropane tri(3-mercaptopropionate), trimethylolpropane tri(2-mercaptoacetate), pentaerythritol tetra(3-mercaptopropionate), pentaerythritol tetra(2-mercaptoacetate), polyol-3-mercaptopropionates, polyol-2-mercaptoacetates, polyester-3-mercaptopropionates, polyester-2-mercaptoacetates, and ethoxylated trimethylolpropane tri(3-mercaptopropionate), and wherein the polythiol group forms at least 10% by weight of the crosslinked resin, and wherein the phenol formaldehyde is a phenol formaldehyde resole.