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| Jiehua Magnesium Silicate |
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| Magnesium silicate |
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| 2MgO.6SiO2.nH2O |
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| 1343-88-0 |
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Polyoxyalkylene ether polyols, hereinafter for convenience called polyols, are commonly used in the production of urethane polymers. These polyols are reacted with polyisocyanate in the presence of added catalyst and other materials to produce urethane polymers which may be in the form of rubber-like elastomers, flexible or rigid foams and the like. In order that urethane polymers of desired properties and characteristics be produced, it is important that the polyols to be reacted with the polyisocyanate are essentially free of impurities which may function as undesirable catalysts or otherwise in the urethane polymer reaction.
It has been discovered that the process of catalyst removal from polyols can be improved by adding a critical amount of water, 1.0 to 5.0 percent by weight, based on the weight of polyol to the mixture of polyol and adsorbent prior to heating and filtration.
Synthetic Magnesium Silicate Adsorbent is white fine powder, amorphous, with vesicular structure and huge specific area, it is an amphoteric compound capable of adsorbing either acid or alkali metal catalyst. It is an efficient refining and purifying agent in the production of polyols for its excellent depicking, deodorizing, potassium ion adsorbing effects and function as filter medium. |
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SiO2, %: 60-68
MgO,%: 13-16
Loss on Drying (105'C,2h),% : < 10
Particle Size(250um-125um) Min.: 90
pH Value: 9.5-10.5
Specific Area, m2/g Min.: 500
Pore Volume, ml/g Min.: 0.6
Activity,mgKOH/g: 220-241
Filtration Time(s): 50-120
SO42- ,% Max: 0.50
Cl- ,% Max: 0.50
Appearance: White powder with good fluidity |
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