A kind of oil-releasing silica gel and its preparation method and application
A technology of silica gel and rubber materials, which is applied in the field of oil-discharging silica gel and its preparation. It can solve the problems of difficult control of oil-discharging parts, large compression permanent deformation, and drug contamination, etc., and achieve good lubricating effect, reduced addition amount, and stable oil production. control effect
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Embodiment 1
[0043] Take 100 parts of methyl-terminated polymethyl vinyl raw rubber with a molecular weight of 500,000 and a vinyl content of 0.05 wt%, 8 parts of a hydrogen-containing crosslinking agent with a hydrogen content of 0.8 wt% and a viscosity of 25 mPa·s, and 2 parts Hydroxyl silicone oil with a hydroxyl content of 6.0wt% and a viscosity of 20mPa·s, and 45 parts of precipitated white carbon black were added to a kneader and kneaded into a block, heated to 150°C, and kneaded at -0.05Mpa for 30min to obtain a common compound Rubber compound.
[0044] Take 100 parts of methyl-terminated polymethyl vinyl raw rubber with a molecular weight of 500,000 and a vinyl content of 0.05 wt%, 8 parts of a hydrogen-containing crosslinking agent with a hydrogen content of 0.8 wt% and a viscosity of 25 mPa·s, and 2 parts Hydroxyl silicone oil with a hydroxyl content of 6.0wt% and a viscosity of 20mPa·s, 2 parts of silicone wax, 1 part of polyisobutylene, 0.2 parts of perfluorohexylethylene, and ...
Embodiment 2
[0049] Take 100 parts of terminal vinyl polymethylvinyl with a molecular weight of 650,000 and a vinyl content of 0.06 wt%, 10 parts of a hydrogen-containing crosslinking agent with a hydrogen content of 0.5 wt% and a viscosity of 20mPa·s, and 2 parts of a hydroxyl content 8wt% high-vinyl silicone oil with a viscosity of 25mPa·s, 40 parts of fumed white carbon black is added to a kneader and kneaded into a block, the temperature is raised to 160°C, and the kneading is continued for 15min at -0.06MPa to obtain a common kneading Gum.
[0050] Take 100 parts of vinyl-terminated polymethylvinyl raw rubber with a molecular weight of 650,000 and a vinyl content of 0.05%, 10 parts of a hydrogen-containing crosslinking agent with a hydrogen content of 0.5 wt% and a viscosity of 20 mPa·s, and 2 parts of hydroxyl Add hydroxy silicone oil with a content of 8.0wt% and a viscosity of 30mPa·s, 1 part of liquid paraffin, 2 parts of polyisobutylene, 0.5 parts of perfluorobutylethylene, and 40...
Embodiment 3
[0053] Take 100 parts of methyl-terminated polymethyl vinyl raw rubber with a molecular weight of 720,000 and a vinyl content of 0.08 wt%, 15 parts of a hydrogen-containing crosslinking agent with a hydrogen content of 0.1 wt% and a viscosity of 40 mPa·s, and 5 parts Hydroxyl silicone oil with a hydroxyl content of 10.0wt% and a viscosity of 30mPa·s, and 25 parts of precipitated white carbon black were added to a kneader and kneaded into a block, heated to 160°C, and kneaded at -0.06MPa for 15 minutes to obtain a common compound Rubber compound.
[0054] Take 100 parts of methyl-terminated polymethyl vinyl raw rubber with a molecular weight of 720,000 and a vinyl content of 0.08 wt%, 15 parts of a hydrogen-containing crosslinking agent with a hydrogen content of 0.1 wt% and a viscosity of 40 mPa·s, and 2 parts Hydroxyl silicone oil with a hydroxyl content of 10.0wt% and a viscosity of 30mPa·s, 1 part of polyisobutylene, 1 part of polyisobutylene, 0.5 part of perfluorohexylethy...
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