Diundecyl phthalate (DUP), is a primary plasticizer developed for wire and cable insulation compounds. DUP has a higher degree of linearity than many competitive DUPs and thus shows superior performance in efficiency, aging and low temperature flexibility. DUP is recommended for vinyl compounds for automotive applications.It is also recommended for vinyl compounds used in automotive applications requiring low fog performance and low temperature flexibility. DUP is stabilized with 0.1% 1,1,13-Tris(2-methyl-4-ydroxy-5-tert-butylphenyl)butane antioxidant. The lower pour point of DUP requires inside storage or heated tanks if ambient temperatures fall below 50 F (10 C) for extended periods.
Formulations made from DUP have low volatility and excellent oxidation resistance at high temperatures, and therefore, better retention of properties after oven aging. It can be blended with other linear phthalates or DPHP to improve performance, or with trimellitates for formulating lower cost 75 C, 90 C and 105 C wire insulation compounds. DUP is also recommended for vinyl compounds used in automotive applications requiring low fog performance and low temperature flexibility.
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