Textile Auxiliaries.A composite softener (based on thiodisuccinic acid long-chain ester, synthesized from MA maleic anhydride and stearyl alcohol) is used for softening cotton, silk, and polyester fabrics. MA is also used to make fluorescent whitening agents and dye dispersants for textile printing and dyeing.
Oil Additives.Oil pour-point depressants (synthesized from maleate esters and fumarate esters) are added to lubricants and petroleum to improve low-temperature fluidity.

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