Patent ID: 11932748
Assignee: CHANG CHUN PLASTICS CO., LTD.
Field: Measurement (Instruments)
Classification: CPC C  G | IPC C  G

Claim 0:
1. A di(2-ethylhexyl) terephthalate composition comprising di(2-ethylhexyl) terephthalate, optionally a first component, optionally a second component, a third component, and a fourth component, wherein:
when the di(2-ethylhexyl) terephthalate composition is characterized by gas chromatography (GC), the first component is eluted at a retention time ranging from 4.8 minutes to 6.0 minutes, the second component is eluted at a retention time ranging from 9.0 minutes to 10.0 minutes, the third component is eluted at a retention time ranging from 10.1 minutes to 12.0 minutes, and the fourth component is eluted at a retention time ranging from 21.0 minutes to 22.1 minutes, and the ratio of the total area of the chromatographic peaks indicating the first component, second component, and third component to the area of the chromatographic peaks indicating the fourth component is 0.172 to 1.118;
wherein the ratio of the area of the chromatographic peaks indicating the third component to the area of the chromatographic peaks indicating the fourth component is 0.135 to 1.118;
wherein when using gas chromatography (GC) to characterize the di(2-ethylhexyl) terephthalate composition, the di(2-ethylhexyl) terephthalate composition is loaded into a ZB-1 capillary column of 30 meters in length, 530 μm in inner diameter and 1.5 μm in film thickness, and the characterization is conducted under the following conditions: a stationary phase of 100% polydimethylsiloxane, a carrier gas of nitrogen with a flow rate of 10 mL/min, a stepping temperature in a sequence of 50° C. for 5 minutes, then raising from 50° C. to 320° C. with a rate of 10° C./min and followed by 320° C. for 3 minutes, an inlet temperature of 220° C., a sample injection volume of the di(2-ethylhexyl) terephthalate composition of 1 μL, and use of a flame ionization detector operated at 340° C.; and
wherein di(2-ethylhexyl) terephthalate is eluted at a retention time ranging from 28.0 minutes to 31.0 minutes when the di(2-ethylhexyl) terephthalate composition is characterized by gas chromatography (GC), and based on the total area of the chromatographic peaks of the di(2-ethylhexyl) terephthalate composition, the area of the chromatographic peaks indicating di(2-ethylhexyl) terephthalate is 99 area % or more.