摘要:
Silicone paste compositions are disclosed by combining a silicone organic elastomer gel with water or a hydrophilic solvent. The silicone paste compositions may further contain a personal or healthcare active. The silicone organic elastomer gel is prepared by reacting in a carrier fluid an organohydrogensiloxane with two polyoxyalkylenes, the first polyoxyalkylene having aliphatic unsaturation at both each molecular termini, and the second polyoxyalkylene having aliphatic unsaturation at one molecular terminal.
摘要:
Silicone organic gels and ge! paste compositions are disclosed containing a silicone organic elastomer in a carrier fluid. The silicone organic elastomer is a reaction product of a linear or branched organohydrogensiioxane, an α, ω-unsaturated polyυxyalkylene, and a hydrosilylation catalyst. The silicone organic elastomer is particularly useful to gel organic carrier fluids. The gels and gels pastes also provide enhanced compatibility with many personal and health care actives.
摘要:
Silicone organic gels and gel paste compositions are disclosed containing a silicone organic elastomer in a carrier fluid. The silicone organic elastomer is a reaction product of a linear or branched organohydrogensiloxane, an α, ω-unsaturated polyoxyalkylene, and a hydrosilylation catalyst. The silicone organic elastomer is particularly useful to ge! organic earner fluids, The gels and gels pastes also provide enhanced compatibility with many personal and health care actives.
摘要:
Silicone paste compositions are disclosed by combining a silicone organic elastomer gel with water or a hydrophilic solvent. The silicone paste compositions may further contain a personal or healthcare active. The silicone organic elastomer gel is prepared by reacting in a carrier fluid an organohydrogensiloxane with two polyoxyalkylenes, the first polyoxyalkylene having aliphatic unsaturation at both each molecular termini, and the second polyoxyalkylene having aliphatic unsaturation at one molecular terminal.
摘要:
Personal care or healthcare compositions are disclosed comprising a hydrophobic silicone organic elastomer gel blend having viscosity of at least 50 Pa-s. The hydrophobic silicone organic elastomer gel blend contains a silicone organic elastomer and a carrier fluid. The gel blend may be prepared by shearing a silicone organic elastomer or silicone organic elastomer gel with the carrier fluid.
摘要:
A method for processing polycrystalline silicon workpieces to form size distributions of polycrystalline silicon pieces suitable for use in a Czochralski-type process includes: (1) preparing a polycrystalline silicon workpiece by a chemical vapor deposition process; (2) fracturing the polycrystalline silicon workpiece into a mixture of polycrystalline silicon pieces, where the polycrystalline silicon pieces have varying sizes; and (3) sorting the mixture of polycrystalline silicon pieces into at least two size distributions. Step (2) may be carried out by a thermal shock process. Step (3) may be carried out using a rotary indent classifier. A rotary indent classifier for performing the method includes: (i) a rotating cylinder having a circumferential edge with indents arrayed in increasing size from a first end of the cylinder to a second end of the cylinder, and (ii) a conveyor running longitudinally adjacent the cylinder, for conveying silicon pieces from the first end of the cylinder to the second end of the cylinder.
摘要:
A method for processing polycrystalline silicon workpieces to form size distributions of polycrystalline silicon pieces suitable for use in a Czochralski-type process includes: (1) preparing a polycrystalline silicon workpiece by a chemical vapor deposition process; (2) fracturing the polycrystalline silicon workpiece into a mixture of polycrystalline silicon pieces, where the polycrystalline silicon pieces have varying sizes; and (3) sorting the mixture of polycrystalline silicon pieces into at least two size distributions. Step (2) may be carried out by a thermal shock process. Step (3) may be carried out using a rotary indent classifier. A rotary indent classifier for performing the method includes: (i) a rotating cylinder having a circumferential edge with indents arrayed in increasing size from a first end of the cylinder to a second end of the cylinder, and (ii) a conveyor running longitudinally adjacent the cylinder, for conveying silicon pieces from the first end of the cylinder to the second end of the cylinder.