Category blogs

A DOA-based cable compound that passes the cold-bend test on day one can still stiffen and shed plasticizer after two summers in a hot conduit. That aging gap, not the day-one flexibility, is what replacing DOA really turns on. Dioctyl…

A plasticizer quote lands with a safety data sheet and a one-line claim of REACH compliance. Whether that claim is enough to sign the purchase order depends on which of three REACH lists the substance touches. Those three are the…

Japan’s food-contact positive list became fully enforceable on June 1, 2025. The change inverted the logic most exporters had built their files around — a plasticizer is now barred unless it is affirmatively listed, not permitted unless banned. For a…

Ask two suppliers to quote DINCH and, for most of its commercial life, you have been asking essentially one company. BASF’s Hexamoll plant at Ludwigshafen carried the product almost alone, until Evonik added capacity at Marl; DOTP comes off a…

A workable plastisol starts with the process, not the recipe. Two widely published starting-point viscosity bands for the same paste PVC differ by roughly threefold: one lands at 1,000 to 5,000 cP, the other at 2,000 to 15,000 cP at…

The right ESBO dose is really two doses. Run epoxidized soybean oil (ESBO) at 1 to 4 phr and it works mostly as a co-stabilizer, propping up your Ca/Zn system. Push it toward and past 5 phr and it starts…

One additive in a flexible PVC recipe both softens the compound and neutralizes the hydrogen chloride that degrades it during hot processing. Epoxidized soybean oil — ESBO on most spec sheets — does this at just 1-5 phr, working beside…

Two drums of isononyl alcohol can both certify above 99.5% assay and still make DINP with measurably different low-temperature flexibility. The parameter that governs cold-flex and volatility is not the assay figure on the front of the certificate. It is…

A phthalate plasticizer is an ortho-phthalate diester — phthalic anhydride reacted with two alcohol chains — that dissolves physically into rigid PVC to make it flexible. Roughly 90 to 95 percent of all phthalates go into flexible PVC, which makes…

Yes, PVC and CPVC resins can be blended, but they are only marginally compatible, and the higher the CPVC’s chlorine content, the worse they mix. Mixing here means blending the two resins in one compound; joining PVC pipe to CPVC…

Most processors never run a resin test in-house. They accept the supplier’s certificate of analysis, file it, and find out a lot was borderline only when the defect shows up on the line weeks later. Reading that certificate parameter by…