Just went through basics - Propylene is the most used raw material and hence their input cost will be function of propylene prices from HPCL.
Propylene price trend - https://www.statista.com/statistics/796033/us-price-of-polypropylene/
Few other developments are
1.The commissioning of BPCL oxo alcohol plant in Kochi.
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Also not all the countries are covered in ADD as mentioned in ICRA report so there is still pressure from CHINA for DOP dumping in India ( I believe ICRA is referring to this - http://www.dgtr.gov.in/anti-dumping-cases/anti-dumping-duty-investigation-concerning-imports-“dioctyl-phthalate-dop”)
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Additionally as mentioned in the Annual Report --> Taiwan, Brazil, USA and Japan are new countries added recently to import in India.