Back to results
US 4,378,450 AGranted
Phenolic resin compositions
AssigneeMitsui Toatsu Chemicals, Inc.
InventorsKenji Ema, Junji Hara, Shuhei Ikado, Hideo Kawashima, Tomohide Yokoo
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeMitsui Toatsu Chemicals, Inc.
InventorsKenji Ema, Junji Hara, Shuhei Ikado, Hideo Kawashima, Tomohide Yokoo
Estimating the term…
Phenolic resin compositions comprising a polymeric substance having a phenolic OH group such as phenol resins, and a rubber having an epoxy group and an epoxy equivalent of 500 to 30,000 such as butadiene copolymers, acrylic copolymers, chloroprene copolymers and urethane copolymers are provided. These resin compositions exhibit improved properties having overcome the drawback of brittle properties intrinsic of conventional phenolic resins, and also exhibit cold resistance; hence they are used as molding materials, laminating materials, casting materials, binders, etc. Further, molding resin compositions having improved solvent-resistance and metal insert properties are provided.
Phenolic resin compositions comprising 100 parts by weight of a polymeric substance having a phenolic OH group selected from the group consisting of a phenolic resin and a phenolic polymer and 1 to 100 parts by weight of rubber containing an epoxy group in its molecule and having an epoxy equivalent of 500 to 30,000, wherein said rubber containing an epoxy group is selected from the group consisting of a butadiene copolymer comprising butadiene as the main component, a urethane polymer and a chloroprene copolymer and has a glass transition temperature of 25.degree. C. or lower.
Phenolic resin compositions obtained by melt-mixing 100 parts by weight of a phenolic resin with 1 to 100 parts by weight of a rubber having an epoxy group in its molecule and having an epoxy equivalent of 500 to 30,000, wherein said rubber containing an epoxy group is selected from the group consisting of a butadiene polymer comprising butadiene as the main component, a urethane polymer and a chloroprene copolymer and has a glass transition temperature of 25.degree. C. or lower.
Dependencies are inferred from the claim text.