Low-loss unsaturated polyester composite water jet abrasive and preparation method thereof
A water jet mill, unsaturated technology, used in chemical instruments and methods, other chemical processes, etc., can solve the problems of poor hydrophilicity, loss, and reduced hydrophilicity of the abrasive surface, achieving strong grinding ability, reducing production costs, The effect of good particle size distribution
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Embodiment 1
[0029] In kettle A, 100kg of isophthalic acid-type unsaturated polyester and 15kg of HEMA were stirred for 30min. The mixture was heated up to 60°C, 10kg of benzoyl peroxide was added, stirring was continued and the temperature was kept at 60°C for 30min. Add 300 kg of water, 5 kg of polyvinyl alcohol, and 0.1 kg of sodium dodecylbenzenesulfonate into kettle B, and raise the temperature to 60° C. at a stirring speed of 300 rpm and a heating rate of 2° C. / min. Add the mixture in kettle A to the dispersion in kettle B, keep the stirring speed at 300rpm, raise the temperature to 85℃ at a heating rate of 2℃ / min, keep stirring for 2 hours, and then discharge. After centrifugation, drying, sieving, and weighing, the yield of abrasives with a particle size between 140 μm and 280 μm is 55.2%, and the abrasive density is 1.16 g / cm 3 , the Vickers hardness is 22.7, and the contact angle with water is 42.6° lower than that of pure unsaturated polyester abrasive. Abrasives and water are...
Embodiment 2
[0031] In kettle A, 100kg of isophthalic acid-type unsaturated polyester and 30kg of HEMA were stirred for 30min. The mixture was heated up to 60°C, 70kg of fine aluminum oxide powder and 10kg of benzoyl peroxide were added, and the mixture was stirred continuously and kept at 65°C for 30min. Add 300kg of water, 5kg of polyvinyl alcohol, and 0.1kg of sodium dodecylbenzenesulfonate into kettle B, and raise the temperature to 65°C at a stirring speed of 300rpm and a heating rate of 2°C / min. Add the mixture in kettle A to the dispersion in kettle B, keep the stirring speed at 300rpm, raise the temperature to 85℃ at a heating rate of 2℃ / min, keep stirring for 2 hours, and then discharge. After being discharged, it is centrifuged, dried, sieved, and weighed. The yield of abrasives with a particle size between 140 μm and 280 μm is 54.1%, and the abrasive density is 1.62 g / cm 3 , the Vickers hardness is 22.6, and the contact angle with water is 24.5° lower than that of pure unsatura...
Embodiment 3
[0033] In kettle A, 100kg of isophthalic acid-type unsaturated polyester and 20kg of HEMA were stirred for 30min. The temperature of the mixture was raised to 55°C, 50kg of fine aluminum oxide powder and 10kg of benzoyl peroxide were added, the stirring was continued and the temperature was kept at 55°C for 60min. Add 300 kg of water, 5 kg of polyvinyl alcohol, and 0.1 kg of sodium dodecylbenzenesulfonate into kettle B, and raise the temperature to 55° C. at a stirring speed of 300 rpm and a heating rate of 2° C. / min. Add the mixture in kettle A to the dispersion in kettle B, keep the stirring speed at 300rpm, raise the temperature to 85℃ at a heating rate of 2℃ / min, keep stirring for 2 hours, and then discharge. After being discharged, it is centrifuged, dried, sieved, and weighed. The yield of abrasives with a particle size between 140 μm and 280 μm is 57.2%, and the abrasive density is 1.47g / cm 3, the Vickers hardness is 34.7, and the contact angle with water is 30.1° lowe...
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