US 12,066,384 B2
Quality control method for diisononyl phthalate, producing method for resin composition, resin composition, and cable or tube
Kazufumi Suenaga, Tokyo (JP); and Ryutaro Kikuchi, Tokyo (JP)
Assigned to PROTERIAL, LTD., Tokyo (JP)
Filed by Hitachi Metals, Ltd., Tokyo (JP)
Filed on Jan. 19, 2021, as Appl. No. 17/152,462.
Claims priority of application No. 2020-010429 (JP), filed on Jan. 24, 2020.
Prior Publication US 2021/0231569 A1, Jul. 29, 2021
Int. Cl. G01N 21/65 (2006.01); C07C 69/80 (2006.01); C08K 5/12 (2006.01); C08L 27/06 (2006.01)
CPC G01N 21/65 (2013.01) [C07C 69/80 (2013.01); C08K 5/12 (2013.01); C08L 27/06 (2013.01); C08L 2203/206 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A quality control method for a plurality of diisononyl phthalates, comprising:
a measuring step of irradiating each of the plurality of diisononyl phthalates produced under different conditions with a laser to measure a Raman spectrum; and
an acceptance or rejection decision step of determining an acceptance or a rejection of a quality of each of the plurality of diisononyl phthalates on the basis of a high and low intensity relationship between an intensity of a first spectral peak, which is ascribed to a vibration of molecular chains in a straight chain hydrocarbon, and an intensity of a second spectral peak, which is ascribed to a vibration of isopropyl groups, in the measured Raman spectrum,
wherein the acceptance or rejection decision step of determining the acceptance or the rejection of the quality is according to a proportion of a straight chain type alkyl chain structures included in each of the plurality of diisononyl phthalates.