Resin Composition For High Speed Curing Prepreg For Car Body Parts Through Press Method And A Prepreg Product Containing The Same

A resin composition for prepregs comprising:

• (a) an epoxy resin comprising a bisphenol A epoxy, a phenol novolac epoxy, a cresol novolac epoxy and a tetraglycidyl diaminodiphenylmethane (TGDDM);
• (b) 3,3′-(4-methyl-1,3-phenylene)bis(1,1-dimethylurea);
• and
• (c) dicyandiamide;
• wherein said bisphenol A epoxy ranges from 20 to 30 parts per hundred parts epoxy resin (phr);
• the novolac epoxy ranges from 55 to 70 parts per hundred parts epoxy resin;
• and
• the tetraglycidyl diaminodiphenylmethane (TGDDM) ranges from 8 to 12 parts per hundred parts epoxy resin, and
• wherein the resin composition satisfies the following condition (i):
• (i) a glass transition temperature of at least 150° C. (DSC) after the resin composition has been heated at 150° C. for 5 minutes.