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Polymeric dispersants in non-aqueous compliant coatings
OLtober/Novembcr
Polymeric dispersants in non-aqueous compliant coatings Maxw,ell, I.D., Cartridge, D. J., Pearce, R.A. in ECJ European Coatings Journal, Issue 9, 2000. A review of the issues in achieving good rheological behaviour in compliant coatings is presented, particularly with respect to pigment dispersion. Polymeric dispersants have been specifically developed to overcome some of the problems posed by changes in technology and reduce the effect of the dispersed pigment on the rheology of the finished paint or ink. Examples are discussed on multi-compatible solvent tinters, UV systems and high solids coatings.
Additives fhr Polvmers
examined by scanning electron microscopy. The collapsing pressure and wetting pressure of the dried membranes were also tested. The effect of polymer concentration, non-solvents, the mixture of non-solvent and LiCl, internal coagulant and post-treatment was studied in details. The PVDF hollow fibers prepared from the small molecular additives exhibit good mechanical strength and excellent hydophobicity. The PVDF hollow fiber spun from the nonsolvent alone exhibits a quite low permeability, while good PVDF porous hollow fiber membranes were prepared using a mixture of the water/LiCl, or 1-propanol/LiCl as the additive.
Porous PVDF asymmetric hollow fiber membranes prepared with the use of small molecular additives Wang, Dongliang. Li, K., Teo, W.K., National lJni\vrsit~~ of’ Singapore, Singapore in Journal ofhftvnhrane Science, Vol 178, Issue 1, 2000. Preparation of polyvinylidene fluoride (PVDF) asymmetric hollow fiber membranes was studied by introducing small molecular additives, which include nonsolvents (water, ethanol and 1-propanol) and inorganic salt (LiCl). Dimethylacetamide (DMAC) was used as a solvent. Water was used as an external coagulant, while water. ethanol or a mixture of water and ethanol was used as an internal coagulant. The prepared PVDF hollow fiber membranes were characterized in terms of water flux. and molecular weight cut-off for the wet membranes. Average pore size and effective surface porosity were determined using the gas permeation method for the dried membranes. The crosssectional structure of the hollow fibers was
02000 Elsevier Science
23
Polymeric dispersants in non-aqueous compliant coatings Maxw,ell, I.D., Cartridge, D. J., Pearce, R.A. in ECJ European Coatings Journal, Issue 9, 2000. A review of the issues in achieving good rheological behaviour in compliant coatings is presented, particularly with respect to pigment dispersion. Polymeric dispersants have been specifically developed to overcome some of the problems posed by changes in technology and reduce the effect of the dispersed pigment on the rheology of the finished paint or ink. Examples are discussed on multi-compatible solvent tinters, UV systems and high solids coatings.
Additives fhr Polvmers
examined by scanning electron microscopy. The collapsing pressure and wetting pressure of the dried membranes were also tested. The effect of polymer concentration, non-solvents, the mixture of non-solvent and LiCl, internal coagulant and post-treatment was studied in details. The PVDF hollow fibers prepared from the small molecular additives exhibit good mechanical strength and excellent hydophobicity. The PVDF hollow fiber spun from the nonsolvent alone exhibits a quite low permeability, while good PVDF porous hollow fiber membranes were prepared using a mixture of the water/LiCl, or 1-propanol/LiCl as the additive.
Porous PVDF asymmetric hollow fiber membranes prepared with the use of small molecular additives Wang, Dongliang. Li, K., Teo, W.K., National lJni\vrsit~~ of’ Singapore, Singapore in Journal ofhftvnhrane Science, Vol 178, Issue 1, 2000. Preparation of polyvinylidene fluoride (PVDF) asymmetric hollow fiber membranes was studied by introducing small molecular additives, which include nonsolvents (water, ethanol and 1-propanol) and inorganic salt (LiCl). Dimethylacetamide (DMAC) was used as a solvent. Water was used as an external coagulant, while water. ethanol or a mixture of water and ethanol was used as an internal coagulant. The prepared PVDF hollow fiber membranes were characterized in terms of water flux. and molecular weight cut-off for the wet membranes. Average pore size and effective surface porosity were determined using the gas permeation method for the dried membranes. The crosssectional structure of the hollow fibers was
02000 Elsevier Science
23