PLASTICS ADDITIVESAN INDUSTRIAL GUIDE phần 5 ppt

Section XXIII Viscosity Regulators 98 Plastics Additives Degussa: AEROSIL for PVC Plastisols: This highly dispersed silica Aerosil has been an established concept in the plastics industry for years. In many cases where problems of controlling viscosity such as thickening and thixotropizing must be solved, Aerosil – thanks to its extremely fine particles and high chemical purity – has proven very effective. This statement also applies to the field of PVC plastisols. Aerosil 200 Aerosil 300 Aerosil 380 Aerosil is a synthetically derived silica which is produced by hydrolysis of silicon tetrachloride in an oxyhydrogen flame. This synthesis results in very pure, highly-dispersed silicas, the specific surface areas of which are used to designate the various grades of the product. That is, the numbers 200, 300, and 380 indicate that the particular product has a specific surface area of 200, 300, and 380 m2/g respectively. Aerosil 200: Fluffy white powder BET surface area: m2/g: 200+-25 Average primary particle size: nm: 12 Ignition Loss: %: <1 pH Value: 3.6-4.3 SiO2: %: >99.8 Aerosil 300: Fluffy white powder BET surface area: m2/g: 300+-30 Average primary particle size: nm: 7 Ignition Loss: %: <2 pH Value: 3.6-4.3 SiO2: %: >99.8 Aerosil 380: Fluffy white powder BET surface area: m2/g: 380+-30 Average primary particle size: nm: 7 Ignition Loss: %: <2.5 pH Value: 3.6-4.3 SiO2: %: >99.8 . XXIII Viscosity Regulators 98 Plastics Additives Degussa: AEROSIL for PVC Plastisols: This highly dispersed silica Aerosil has been an established concept in the plastics industry for years 300, and 380 m2/g respectively. Aerosil 200: Fluffy white powder BET surface area: m2/g: 200+- 25 Average primary particle size: nm: 12 Ignition Loss: %: <1 pH Value: 3.6-4.3 SiO2: %: >99.8 Aerosil. powder BET surface area: m2/g: 380+-30 Average primary particle size: nm: 7 Ignition Loss: %: <2 .5 pH Value: 3.6-4.3 SiO2: %: >99.8