Silica gel, developing roller and preparation method thereof
A developing roller and silica gel technology, which is applied in coatings, polyurea/polyurethane coatings, etc., can solve problems affecting the promotion of rubber developing rollers and poor resistance stability
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[0067] see figure 2 , the preparation method of the developing roller of an embodiment, comprising:
[0068] Step S210: 100 parts of raw rubber, 3 to 40 parts of conductive filler, 10 to 45 parts of white carbon black, 0.5 to 10 parts of magnesium carbonate and 0.5 1-20 parts of stabilizer are mixed to obtain intermediate material.
[0069] Among them, the degree of vacuum under vacuum conditions is 0.08-0.1Mpa, so as to extract the low molecules produced in the rubber mixing process.
[0070] Wherein, the raw rubber is selected from one of methyl vinyl raw rubber and methyl vinyl silicone oil. Further, the vinyl content in the methyl vinyl raw rubber is 0.05-0.5%. Furthermore, the methyl vinyl raw rubber is selected from one of phenyl-substituted methyl vinyl raw rubber and fluorine-substituted methyl vinyl raw rubber.
[0071] It should be noted that when the raw rubber is methyl vinyl raw rubber, the prepared silica gel is solid silica gel; when the raw rubber is methy...
Embodiment 1
[0114] The preparation method of the developing roller of the present embodiment is as follows:
[0115] (1) in parts by mass, with 20 parts of conductive carbon black, 2 parts of carbon nanotubes, 5 parts of graphene, 20 parts of white carbon black, 5 parts of magnesium carbonate and 8 parts of zinc oxide, at least Add 100 parts of methyl vinyl raw rubber in three times (80 parts of methyl vinyl raw rubber with a molecular weight of 600,000 and a mass percentage of vinyl of 0.05%, a molecular weight of 300,000 and a mass percentage of vinyl Stir in 20 parts of methyl vinyl raw rubber with a content of 0.4%, the stirring speed is 28r / min, and the stirring time is 40min to obtain a mixture.
[0116] (2) Stir the mixture for 2.0 hours at 180° C. and a vacuum of 0.1 Mpa to obtain an intermediate material, and then sieve the intermediate material, wherein the meshes of the screens are 100 mesh and 150 mesh.
[0117] (3) In parts by mass, the intermediate material, 1 part of hydro...
Embodiment 2
[0122] The preparation method of the developing roller of the present embodiment is as follows:
[0123] (1) In terms of parts by mass, add 30 parts of conductive carbon black, 20 parts of white carbon black, 5 parts of magnesium carbonate and 8 parts of zinc oxide to 100 parts of methyl vinyl rubber at least three times (80 parts of methyl vinyl raw rubber with a molecular weight of 600,000 and a vinyl mass percentage of 0.05%, 20 parts of a methyl vinyl raw rubber with a molecular weight of 300,000 and a vinyl mass percentage of 0.4% ), the stirring speed was 28r / min, and the stirring time was 40min to obtain a mixture.
[0124] (2) Stir the mixture for 2.0 hours at 180° C. and a vacuum of 0.1 Mpa to obtain an intermediate material, and then sieve the intermediate material, wherein the meshes of the screens are 100 mesh and 150 mesh.
[0125] (3) In parts by mass, the intermediate material, 1 part of hydrogen-containing silicone oil and 0.7 part of platinum vulcanizing agen...
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Abstract
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