High-thixotropic poly(vinyl chloride) plastic sol
A polyvinyl chloride and plastisol technology, applied in the field of highly thixotropic polyvinyl chloride plastisol compositions, can solve problems such as high curing temperature and short storage period
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Embodiment 1
[0033] First, 128 kg of dioctyl phthalate (purchased from Shanghai Solvent Factory) was mixed with 8.7 kg of dimer acid polyamide (trade name 305, purchased from Japan Sanwa Company) and 8.7 kg of phenol-blocked hexamethylene diisocyanate. Then mix 12 kg of dry bentonite. Then add 127 kilograms of polyvinyl chloride paste resin (trade name WP-62GP, purchased from Shanghai Tianyuan Chemical Plant) and 220 kilograms of calcium carbonate in a high-speed disperser to disperse for half an hour, and then vacuum deaeration for 3 hours after mixing.
[0034] The polyvinyl chloride plastisols prepared above have little increase in viscosity after being stored for half a year (initial viscosity is 25000mPa.s / 25°C, after half a year the viscosity is 50000mPa.s / 25°C), and the continued use performance remains unchanged. Roll the plastisol on a zinc-coated iron plate, the glue layer is 2 mm thick, inverted for 3 minutes, the glue does not sag or flow. After curing at 160℃ for 10 minutes, the...
Embodiment 2
[0036] First, 135 kg of dioctyl phthalate was mixed with 9 kg of dimer acid polyamide (trade name 305) and 9 kg of phenol-blocked polymethylene polyphenylene isocyanate (PAPI), and then mixed into the dry gas phase II 4 kg of silicon oxide. Then add 140 kilograms of polyvinyl chloride paste resin (WP-62GP) and 216 kilograms of dry calcium carbonate and disperse in a high-speed disperser for half an hour. After mixing, vacuum deaeration is completed for 3 hours.
[0037] The polyvinyl chloride plastisols prepared above have little increase in viscosity after being stored for half a year (the initial viscosity is 35000mPa.s / 25°C, and the viscosity is 70,000mPa.s / 25°C after half a year), and the continued use performance remains unchanged. Roll the plastisol on a zinc-coated iron plate with a thickness of 2 mm and leave it upside down for 3 minutes. The glue will not sag or flow. After curing at 160℃ for 10 minutes, the adhesive strength of the coating is 1.10N / mm 2 (Steel-steel sh...
Embodiment 3
[0039] First, 135 kg of dioctyl phthalate was mixed with 9 kg of dimer acid polyamide (305) and 9.1 kg of phenol-blocked trimer TDI isocyanate, and then mixed with 4 kg of dry fumed silica. Then add 145 kilograms of polyvinyl chloride paste resin (WP-62GP) and 216 kilograms of dry calcium carbonate to disperse in a high-speed disperser for half an hour. After mixing, vacuum deaeration is completed for 3 hours.
[0040] The polyvinyl chloride plastisols prepared above have little increase in viscosity after being stored for half a year (initial viscosity is 30000mPa.s / 25°C, after half a year the viscosity is 60000mPa.s / 25°C), and the continued use performance remains unchanged. Roll the plastisol on a zinc-coated iron plate with a thickness of 2 mm and leave it upside down for 3 minutes. The glue will not sag or flow. After curing at 160℃ for 10 minutes, the adhesive strength of the coating is 1.23N / mm 2 (Steel-steel shear resistance).
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Abstract
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