Composite material and process for producing the same
AssigneeKabushiki Kaisha Toyota Chuo Kenkyusho
InventorsAkane Okada, Masaya Kawasumi, Masao Kohzaki, Megumi Fujimoto, Yoshitsugu Kojima, Toshio Kurauchi, Osami Kamigaito
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Abstract
Provided herein is a composite material which comprises a polyamide-containing resin, a layered silicate dispersed therein, and a substance such as polyamine which controls the crystalline structure or molecular structure of the resin. The composite material has improved mechanical strength and toughness and high clarity or transparency.
Claims12
A process for producing a composite material which comprises a contacting step of contacting a layered clay mineral having a cation exchange capability of 50 to 200 millequivalents per 100 g with a swelling agent, thereby forming a complex which has the property of being swollen by a molten polyamide monomer, a mixing step of mixing said complex with a monomer of polyamide, and a polymerization step of polymerizing said monomer contained in said mixture by heating said mixture, and adding a substance to control the crystalline structure or molecular structure of the polyamide-containing resin in the mixing step and/or the polymerization step wherein the substance is a polyamine and is at least one member selected from diamines, triamines, and tetramines, pentamines, and aliphatic polyamines.
A process for producing a composite material which comprises a contacting step of contacting a layered clay mineral having a cation exchange capacity of 50 to 200 milliequivalents per 100 g with a swelling agent, thereby forming a complex which has the property of being swollen by a molten polyamide monomer, a mixing step of mixing said complex with a monomer of polyamide, and a polymerization step of polymerizing said monomer contained in said mixture by heating said mixture, and adding a substance to control the crystalline structure of molecular structure of the polyamide-containing resin in the mixing step and/or the polymerization step wherein the substance is a stabilizer and is at least one member selected from phenol derivatives and organophosphoric compound and is present in an amount of 0.05 to 5 parts by weight per 100 parts by weight of the resin.
Dependencies are inferred from the claim text.