Composite plastic with good acid and alkali resistance and preparation method thereof

[0021] Example 1

[0022] A composite plastic with good acid and alkali resistance, including the following raw materials by weight: 21 parts of PVC resin, 8.6 parts of polyethylene oxide, 32 parts of polyolefin elastomer, 0.8 parts of coupling agent, 6 parts of methyl ethyl ketone peroxide, 1 part of antioxidant, 12 parts of nano zirconium dioxide, 10 parts of grapefruit peel, 3.6 parts of glass fiber and 8 parts of styrene-acrylic emulsion. The coupling agent uses a silane coupling agent.

[0023] The specific steps of the method for preparing the composite plastic with good acid and alkali resistance are as follows:

[0024] Step one: freeze-dry the grapefruit peel at minus 5 degrees Celsius for 16 minutes and then crush it to 130 mesh, add the grapefruit peel powder to 8 times its weight in water, cook for 84 minutes at 86 degrees Celsius, and filter to obtain the grapefruit peel cooking liquor and filter residue. The filter residue was refluxed and extracted with ethanol with a m

[0030] Example 2

[0031] A composite plastic with good acid and alkali resistance, including the following raw materials by weight: 23.6 parts of PVC resin, 10.5 parts of polyethylene oxide, 37.8 parts of polyolefin elastomer, 1.1 parts of coupling agent, 7.6 parts of methyl ethyl ketone peroxide, 1.3 parts of antioxidant, 14.4 parts of nano zirconium dioxide, 12.3 parts of grapefruit peel, 4.5 parts of glass fiber and 9.6 parts of styrene-acrylic emulsion. The particle size of nano zirconia is 52nm, and the length of glass fiber is 14mm. The relative molecular weight of polyethylene oxide is 18000-75000.

[0032] The specific steps of the method for preparing the composite plastic with good acid and alkali resistance are as follows:

[0033] Step 1, freeze-dry the grapefruit peel for 15 minutes at minus 8 degrees Celsius and then crush it to 150 mesh, add the grapefruit peel powder to 8 times its weight in water, cook for 84 minutes at 88 degrees Celsius, and filter to obtain the gr

[0039] Example 3

[0040] A composite plastic with good acid and alkali resistance, comprising the following parts by weight: PVC resin 25.8 parts, polyethylene oxide 10.4 parts, polyolefin elastomer 43.5 parts, coupling agent 1.5 parts, 9.4 parts methyl ethyl ketone peroxide, 1.8 parts of antioxidant, 15.7 parts of nano zirconium dioxide, 14.4 parts of grapefruit peel, 5.2 parts of glass fiber and 11.6 parts of styrene-acrylic emulsion. The particle size of nano zirconia is 62nm, and the length of glass fiber is 22mm. The relative molecular weight of polyethylene oxide is 69000-125000.

[0041] The specific steps of the method for preparing the composite plastic with good acid and alkali resistance are as follows:

[0042] Step 1, freeze-dry the grapefruit peel at minus 10 degrees Celsius for 15 minutes and then crush it to 140 mesh, add the grapefruit peel powder to 6 times its weight in water, cook for 82 minutes at 87 degrees Celsius, and filter to obtain the grapefruit peel cooki