Modified calcium carbonate filled PVC tubular product and preparation method thereof
A PVC pipe, calcium carbonate technology, applied in pipeline protection, mechanical equipment, pipeline damage/wear prevention, etc., can solve problems such as poor adhesion between the matrix and filler interface, low mechanical strength of PVC pipes, and shortened pipe service life. , to achieve the effect of good stability, not easy to deform, and improve the notched impact strength
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[0033] Example 1
[0034] A modified calcium carbonate filled PVC pipe, including the following raw materials in parts by weight: 100 parts of PVC resin, 8 parts of bismaleimide, 3 parts of acrylic acid-maleic anhydride copolymer, and polyaminopropyl methyl sesqui Silicone 2.5 parts, maleic acid castor oil ester 1.5 parts, modified nano calcium carbonate 25 parts, asbestos fiber 4 parts, coupling agent 2.5 parts, crosslinking agent 1 part, 1010 antioxidant 1 part, organotin stabilizer 1.2 parts, 1.5 parts of antibacterial agent and 4 parts of processing aid.
[0035] The preparation of the modified calcium carbonate includes the following steps:
[0036] (1) Add quicklime and 60℃ hot water according to the mass ratio of 1:5 into the digestion reactor for digestion reaction, remove impurities, stand for 48h, and dilute to a specific gravity of 1.060 to obtain a lime emulsion;
[0037] (2) The lime emulsion is transported to the carbonation reaction tower, carbon dioxide is introduced ...
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[0045] Example 2
[0046] A modified calcium carbonate filled PVC pipe, including the following raw materials in parts by weight: 100 parts of PVC resin, 6 parts of bismaleimide, 4 parts of acrylic acid-maleic anhydride copolymer, and polyaminopropyl methyl sesqui 1.5 parts of siloxane, 1 part of castor oil maleate, 20 parts of modified nano-calcium carbonate, 3 parts of asbestos fiber, 1 part of coupling agent, 1.5 parts of crosslinking agent, 1.5 parts of 1076 antioxidant, organotin stabilizer 0.8 parts, 2 parts of antibacterial agent and 3.5 parts of processing aid.
[0047] The preparation of the modified calcium carbonate includes the following steps:
[0048] (1) Add quicklime and 70℃ hot water according to the mass ratio of 1:4 into the digestion reactor to carry out the digestion reaction, remove impurities, stand for 36 hours, and dilute to a specific gravity of 1.065 to obtain a lime emulsion;
[0049] (2) The lime emulsion is transported to the carbonation reaction tower, ...
Example Embodiment
[0057] Example 3
[0058] A modified calcium carbonate filled PVC pipe, including the following raw materials in parts by weight: 100 parts by weight of PVC resin, 7 parts of bismaleimide, 5 parts of acrylic acid-maleic anhydride copolymer, and polyaminopropyl methyl sesqui 3 parts of siloxane, 1.5 parts of castor oil maleate, 30 parts of modified nano calcium carbonate, 4 parts of asbestos fiber, 2.5 parts of coupling agent, 1.2 parts of crosslinking agent, 0.8 parts of 1010 antioxidant, calcium zinc stabilizer 1.2 parts, 1 part of antibacterial agent and 5 parts of processing aid.
[0059] The preparation of the modified calcium carbonate includes the following steps:
[0060] (1) Add quicklime and 60℃ hot water into the digestion reactor according to the mass ratio of 1:6 to carry out the digestion reaction, remove impurities, stand for 30h, and dilute to a specific gravity of 1.070 to obtain a lime emulsion;
[0061] (2) The lime emulsion is transported to the carbonation reactio...
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