JP2001139682A5 - - Google Patents

Claims (5)

In the monomer cast nylon resin obtained by polymerizing ε-caprolactam by the monomer cast method, the tensile strength at 23 ° C. measured in accordance with ASTM D-638 is 93 MPa or more, and the tensile strength at 110 ° C. is 49 MPa. A monomer cast nylon resin characterized by the above. The monomer cast nylon resin according to claim 1, wherein the crystallinity of the resin is 55% or more. ε-Caprolactam was polymerized by the monomer cast method, and the resulting polymer was heated from room temperature to 160 to 200 ° C. in 2 to 15 hours, held at the temperature for 9 to 15 hours, and then 3 A method for producing a monomer cast nylon resin, which is subjected to a post-process of cooling to room temperature in 30 hours. In the polymerization of ε-caprolactam by the monomer casting method, the total amount of ε-caprolactam and the polymerization catalyst is 100 mol%, and 0.15 to 0.5 mol% of the polymerization catalyst, and 1/2 of the polymerization catalyst Using the double-functional to equimolar amount of monofunctional polymerization promoter, or the bifunctional polymerization promoter of 1/4 to 1 / 2-fold molar amount with respect to the polymerization catalyst , the obtained polymer, Heating from room temperature to 160 to 200 ° C. in 2 to 15 hours, holding at that temperature for 3 to 5 hours, and then cooling to room temperature in 3 to 30 hours, followed by a post-process Manufacturing method of monomer cast nylon resin. The manufacturing method according to claim 4 , wherein the holding temperature in the subsequent step is 165 to 175 ° C, and the holding time at the temperature is 1 to 2 hours.