Pulverulent polycondensation products
A polycondensation product, powdery technology, applied in the field of powder polycondensation products, can solve the problems of the influence of polymer activity, failure to achieve high degree of polymerization, high cost, etc.
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Embodiment A-1
[0046] 1mol of poly(ethylene oxide) monophenyl ether (2000g / mol), 1mol of phenoxyethanol phosphate (or 2-phenoxyethanol dihydrogen phosphate and 2-phenoxyethanol hydrogen phosphate mixture), 0.6mol water and 2mol concentrated H 2 SO 4 Add with stirring. To the solution thus formed was added dropwise 2 mol of formaldehyde in the form of a 37% aqueous solution. The polycondensation reaction was completed at 105°C over a period of 5 hours. After the reaction, without pre-neutralization, basic alumina (particle size 0.05-0.15mm) was slowly stirred into the liquid polymer melt at about 80°C until a soft powder was formed. The amount of aluminum oxide was selected such that the proportion of the polycondensation product on the support was 10% by weight.
Embodiment A-2
[0048] 1mol of poly(ethylene oxide) monophenyl ether (2000g / mol), 1mol of phenoxyethanol phosphate (or 2-phenoxyethanol dihydrogen phosphate and 2-phenoxyethanol hydrogen phosphate mixture), 0.6mol water and 2mol concentrated H 2 SO 4 Mix under stirring. To the solution thus formed was added dropwise 2 mol of formaldehyde in the form of a 37% aqueous solution. The polycondensation reaction was completed at 105°C over a period of 5 hours. After the reaction, without pre-neutralization, basic alumina (particle size 0.05-0.15mm) was slowly stirred into the liquid polymer melt at about 80°C until a soft powder was formed. The amount of aluminum oxide was selected such that the proportion of the polycondensation product on the support was 20% by weight.
Embodiment A-3
[0050] 1mol of poly(ethylene oxide) monophenyl ether (2000g / mol), 1mol of phenoxyethanol phosphate (or 2-phenoxyethanol dihydrogen phosphate and 2-phenoxyethanol hydrogen phosphate mixture), 0.6mol water and 2mol concentrated H 2 SO 4 Mix under stirring. To the solution thus formed was added dropwise 2 mol of formaldehyde in the form of a 37% aqueous solution. The polycondensation reaction was completed at 105°C over a period of 5 hours. After the reaction, without prior neutralization, slowly stir Sipernat into the liquid polymer melt at about 80 °C (precipitated silicic acid, the average particle diameter is 15μm, and the specific surface area is 50m 2 / g), until a soft powder is formed. Select Sipernat like this The amount is such that the share of the polycondensation product on the support is 30% by weight.
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