Low-temperature-resistant frozen polycarbonate abrasive, raw materials and method for preparation thereof, and method for removing burrs
A polycarbonate and low-temperature-resistant technology, which is applied in the field of low-temperature-resistant freezing polycarbonate abrasives and their preparation raw materials and preparation, can solve the problems of low-temperature draping treatment effect and poor wear resistance, and achieve good draping effect and good dispersion , Improve the effect of low temperature impact toughness
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[0021] In the present invention, the polycarbonate, silicone-polycarbonate copolymer and toughening agent are essential components, while compatibilizers and other auxiliary agents are optional components. Wherein, the weight ratio of the polycarbonate, the silicone-polycarbonate copolymer and the toughening agent is (7.5-50):(0.5-15):1. Based on the total weight of the preparation raw materials of the low-temperature-resistant polycarbonate abrasive, the content of the compatibilizer can be 0-5wt%, preferably 0.1-1wt%; the content of the other auxiliary agents can be 0 ~5 wt%, preferably 0.1-1 wt%. According to a preferred embodiment of the present invention, the raw material for the preparation of the low temperature resistant polycarbonate abrasive consists of the following components: polycarbonate 60-90wt%, organosilicon-polycarbonate copolymer 5-30wt%, 2-8 wt% of the toughening agent, 0.1-1 wt% of the compatibilizer and 0.1-1 wt% of other auxiliary agents.
[0022] In ...
Embodiment 1
[0032] Aromatic polycarbonate (viscosity-average molecular weight 17000, melt index 3g / 10min at 300°C and 1.2kg), silicone-polycarbonate copolymer (purchased from Samyang Chemical Co., Ltd., brand ST6- 3022PJ, the weight-average molecular weight is 25000, and the effective silicon content is 6wt%), toughening agent (purchased from Mitsubishi Rayon Company, the brand is S-2030, has a core-shell structure, and the shell is methyl methacrylate with a number-average molecular weight of 25000 ester-styrene copolymer, the core is silicone rubber with a glass transition temperature Tg of -75°C), a compatibilizer (purchased from Arkema, the brand is AX8900) and other additives (phosphorus antioxidant AO- 168) placed in a mixer to stir and mix evenly, and then put the obtained mixture into a twin-screw extruder with a length-to-diameter ratio of 40:1 for melting and mixing, and then melt, extrude, draw, and pelletize through a die to obtain Low-temperature freeze-resistant polycarbonat...
Embodiment 2
[0034] Aromatic polycarbonate (viscosity average molecular weight: 28000, melt index at 300°C, 1.2kg: 3g / 10min), organosilicon-polycarbonate copolymer (purchased from Samyang Chemical Company, brand name: ST6- 3022PJ, the weight-average molecular weight is 25000, and the effective silicon content is 6wt%), toughening agent (purchased from Mitsubishi Rayon Company, the brand is S-2030, has a core-shell structure, and the shell is methyl methacrylate with a number-average molecular weight of 25000 ester-styrene copolymer, the core is silicone rubber with a glass transition temperature Tg of -75°C), a compatibilizer (purchased from Arkema, the brand is AX8900) and other additives (phosphorus antioxidant AO- 168) placed in a mixer to stir and mix evenly, and then put the obtained mixture into a twin-screw extruder with a length-to-diameter ratio of 40:1 for melting and mixing, and then melt, extrude, draw, and pelletize through a die to obtain Low-temperature freeze-resistant poly...
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