Secondary suspending agent

Further Study of the Role of Secondary Suspending Agents... 

Porosity enhances the ability of PVC parhcles to easily release VCM dissolved in polymer, to absorb addihves, such as plashcizer, and to be easily deformable under heat and shear in an extruder. Secondary suspending agents that stabilize internal structure and early terminahon of polymerizahon enhance porosity. 

Use Thickening and suspending agent stabilizer for vinyl polymerization retards evaporation of water in cements, mortars, and concrete binder in ceramic glazes, films, and sheeting protective colloid paper and textile sizing secondary petroleum recovery. 

Attachment of amine to resin 73 [83] Resin 73 (0.3 g, 0.17 mmol) was taken up in a mixture of DMF (4 mb) and the secondary amine (3 mmol) and shaken for 18 h at rt to yield 74. The resulting resin was then washed with DMF (three times), CH2CI2 (three times), and MeOH (twice), and dried under vacuum. For quaternization, the resin was suspended in a solution of the alkylating agent R X (1.5 mmol) in DMF (4 mb) and the mixture was shaken for 18 h at rt to yield 75. The resin was washed with DMF (three times), CH2CI2 (three times), and MeOH (twice) and dried under vacuum. 

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