Polyurethane elastomer printing rubber roller and preparation method thereof
A polyurethane elastomer, printing rubber roller technology, used in printing, printing presses, rotary printing presses and other directions, can solve the problems of high temperature resistance, poor solvent resistance, poor printing effect, large pollution and environmental protection, and achieve good solvent resistance. , eliminating the need for production equipment, increasing the effect of corporate and social benefits
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Embodiment 1
[0026] (1) Heat 50g of polyol (polyester polyol 218) to 110°C for 4 hours in vacuum dehydration, drop to 70°C, add 25g of TDI T100, control the temperature at 90°C, and mix for 2 hours to prepare a semi-prepolymer;
[0027] (2) Heat 50g of polyol (polyester polyol 218) to 110°C for 4 hours in vacuum dehydration, lower it to 70°C, and mix it with curing agent TIPA10g;
[0028] (3) Mix the products prepared in step (1) and step (2), add the reaction control agent dibutyltin dilaurate T120.01mg, stir and react for 10 minutes, inject the mold into an oven at 120°C, and vulcanize for 20 Hours, then unmould.
[0029] The cot performance test that embodiment 1 prepares:
[0030] The elasticity of the rubber roller prepared in Example 1 is 40 degrees, and the elasticity of the common printing and dyeing rubber roller is about 32 degrees.
[0031] Strength resistance: soaking in the thinner for 4 hours reduces the strength by about 1 / 2, and ordinary printing and dyeing rubber rollers...
Embodiment 2
[0034] (1) Heat 24kg of polyol (polyester polyol 218) to 115°C for 6 hours in vacuum dehydration, drop to 75°C, add 20kg of TDI T100, control the temperature at 98°C, and mix for 4 hours to prepare a semi-prepolymer;
[0035] (2) Heat 16kg of polyol (polyester polyol 218) to 115°C for vacuum dehydration for 6 hours, lower it to 75°C, and mix it with curing agent TIPA10kg;
[0036] (3) Mix the products prepared in step (1) and step (2), add a drop of 0.01 mg of the reaction control agent dibutyltin dilaurate, stir and react for 10 minutes, inject the mold into an oven at 120°C, and vulcanize for 20 Hours, then unmould.
[0037] The cot performance test that embodiment 2 prepares:
[0038] The elasticity of the rubber roller prepared in Example 2 is 42 degrees, and the elasticity of the common printing and dyeing rubber roller is about 32 degrees.
[0039] Strength resistance: soaking in the thinner for 4 hours reduces the strength by about 1 / 2, and ordinary printing and dyein...
Embodiment 3
[0042] (1) Heat 48kg of polyol (polyester polyol 218) to 120°C for 8 hours in vacuum dehydration, drop to 75°C, add 30kg of TDI T100, control the temperature at 78°C, and mix for 4 hours to prepare a semi-prepolymer;
[0043] (2) Heat 72kg of polyol (polyester polyol 218) to 120°C for vacuum dehydration for 8 hours, lower it to 75°C, and mix it with curing agent TIPA15kg;
[0044] (3) Mix the products prepared in step (1) and step (2), add a drop of 0.01 mg of the reaction control agent dibutyltin dilaurate, stir and react for 10 minutes, inject the mold into an oven at 120°C, and vulcanize for 20 Hours, then unmould.
[0045] The cot performance test that embodiment 3 prepares:
[0046] The elasticity of the rubber roller prepared in Example 3 is 43 degrees, and the elasticity of the common printing and dyeing rubber roller is about 32 degrees.
[0047] Intensity resistance, soaking in the thinner for 4 hours reduces the strength by about 1 / 2, and ordinary printing and dyei...
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