阅读说明：本技术 一种耐油硅橡胶 (Oil-resistant silicone rubber ) 是由 毕春花 胡国伟 张要 于 2020-09-15 设计创作，主要内容包括：本发明公开了一种耐油硅橡胶,包括甲基乙烯基硅橡胶80-85重量份、羟基硅油2-3重量份、白炭黑30-45重量份、聚四氟乙烯0.3-0.4重量份、三聚磷酸铝0.8-2.5重量份、铈粉1-3重量份、钼粉1-3重量份、增粘剂2-4重量份。本发明的硅橡胶加入各种物料并用,有效改善了硅橡胶的耐油性、降低了生产成本低。(The invention discloses oil-resistant silicone rubber which comprises 80-85 parts by weight of methyl vinyl silicone rubber, 2-3 parts by weight of hydroxyl silicone oil, 30-45 parts by weight of white carbon black, 0.3-0.4 part by weight of polytetrafluoroethylene, 0.8-2.5 parts by weight of aluminum tripolyphosphate, 1-3 parts by weight of cerium powder, 1-3 parts by weight of molybdenum powder and 2-4 parts by weight of tackifier. The silicone rubber is added with various materials for use, so that the oil resistance of the silicone rubber is effectively improved, and the production cost is reduced.)

1. The oil-resistant silicone rubber is characterized by comprising 80-85 parts by weight of methyl vinyl silicone rubber, 2-3 parts by weight of hydroxyl silicone oil, 30-45 parts by weight of white carbon black, 0.3-0.4 part by weight of polytetrafluoroethylene, 0.8-2.5 parts by weight of aluminum tripolyphosphate, 1-3 parts by weight of cerium powder, 1-3 parts by weight of molybdenum powder and 2-4 parts by weight of tackifier.

2. The oil-resistant silicone rubber according to claim 1, comprising 82 parts by weight of methyl vinyl silicone rubber, 2.5 parts by weight of hydroxy silicone oil, 35 parts by weight of white carbon black, 0.35 part by weight of polytetrafluoroethylene, 1.7 parts by weight of aluminum tripolyphosphate, 2 parts by weight of cerium powder, 1 part by weight of molybdenum powder and 3 parts by weight of tackifier.

3. The oil-resistant silicone rubber according to claim 1, comprising 84 parts by weight of methyl vinyl silicone rubber, 2 parts by weight of hydroxyl silicone oil, 40 parts by weight of white carbon black, 0.3 part by weight of polytetrafluoroethylene, 2 parts by weight of aluminum tripolyphosphate, 1-3 parts by weight of cerium powder, 1-3 parts by weight of molybdenum powder and 2-4 parts by weight of tackifier.

4. The oil-resistant silicone rubber according to claim 1, comprising 80 parts by weight of methyl vinyl silicone rubber, 3 parts by weight of hydroxyl silicone oil, 30 parts by weight of white carbon black, 0.3 part by weight of polytetrafluoroethylene, 0.8 part by weight of aluminum tripolyphosphate, 3 parts by weight of cerium powder, 3 parts by weight of molybdenum powder and 4 parts by weight of tackifier.

5. The oil-resistant silicone rubber according to any one of claims 1 to 4, wherein the tackifier is a phenol resin.

6. The oil-resistant silicone rubber according to claim 1, which is produced by the following steps:

grinding methyl vinyl silicone rubber, white carbon black and polytetrafluoroethylene into powder, uniformly mixing, putting into a kneader, and adding hydroxyl silicone oil and a tackifier;

step two, vacuumizing, wherein the vacuum degree is set to be-0.03 +/-0.01 MPa, the vacuumizing time is 20-30min, after vacuumizing is finished, aluminum tripolyphosphate, cerium powder and molybdenum powder are added, secondary vacuumizing is carried out when the temperature is raised to 140 ℃, the vacuum degree is set to be-0.01 +/-0.01 MPa, and the vacuumizing time is 30-60min to obtain a sizing material;

and step three, pouring the rubber material into a mold, and cooling and forming.

7. The oil-resistant silicone rubber according to claim 6, wherein in the step (a), the temperature rise rate at the time of temperature rise is 2 to 3 ℃/min.

Technical Field

The invention belongs to the field of materials, and particularly relates to oil-resistant silicone rubber.

Background

The silicone rubber has excellent performances of good high and low temperature stability, weather resistance, food safety, insulativity, medical inertia and the like, and has very wide application in automobiles, households, cables, aerospace and the like. The use of the development of silicone rubber products is still growing at present, and market potential is still continuously developed according to the characteristics thereof. However, silicone rubber itself generally has poor resistance to non-polar solvents, fuel oils and mineral oils, especially hot oils. When soaked in hot oil, the paint can swell quickly and the mechanical property is greatly reduced. Therefore, the application of silicone rubber to seals of automobiles, mechanical equipment and the like is hindered, wherein the seals are required to resist high temperature, oil and the like. In order to satisfy the oil resistance, expensive fluororubbers have to be used.

Disclosure of Invention

The invention aims to solve the technical problem of providing the oil-resistant silicone rubber with high mechanical strength and good thermal stability.

In order to solve the problems, the technical scheme adopted by the invention is as follows:

an oil-resistant silicone rubber comprises 80-85 parts by weight of methyl vinyl silicone rubber, 2-3 parts by weight of hydroxyl silicone oil, 30-45 parts by weight of white carbon black, 0.3-0.4 part by weight of polytetrafluoroethylene, 0.8-2.5 parts by weight of aluminum tripolyphosphate, 1-3 parts by weight of cerium powder, 1-3 parts by weight of molybdenum powder and 2-4 parts by weight of tackifier.

2. The oil-resistant silicone rubber according to claim 1, comprising 82 parts by weight of methyl vinyl silicone rubber, 2.5 parts by weight of hydroxy silicone oil, 35 parts by weight of white carbon black, 0.35 part by weight of polytetrafluoroethylene, 1.7 parts by weight of aluminum tripolyphosphate, 2 parts by weight of cerium powder, 1 part by weight of molybdenum powder and 3 parts by weight of tackifier.

The further improvement comprises 84 parts by weight of methyl vinyl silicone rubber, 2 parts by weight of hydroxyl silicone oil, 40 parts by weight of white carbon black, 0.3 part by weight of polytetrafluoroethylene, 2 parts by weight of aluminum tripolyphosphate, 1-3 parts by weight of cerium powder, 1-3 parts by weight of molybdenum powder and 2-4 parts by weight of tackifier.

The further improvement comprises 80 parts by weight of methyl vinyl silicone rubber, 3 parts by weight of hydroxyl silicone oil, 30 parts by weight of white carbon black, 0.3 part by weight of polytetrafluoroethylene, 0.8 part by weight of aluminum tripolyphosphate, 3 parts by weight of cerium powder, 3 parts by weight of molybdenum powder and 4 parts by weight of tackifier.

In a further improvement, the tackifier is a phenolic resin.

The further improvement comprises the following manufacturing steps:

grinding methyl vinyl silicone rubber, white carbon black and polytetrafluoroethylene into powder, uniformly mixing, putting into a kneader, and adding hydroxyl silicone oil and a tackifier;

step two, vacuumizing, wherein the vacuum degree is set to be-0.03 +/-0.01 MPa, the vacuumizing time is 20-30min, after vacuumizing is finished, aluminum tripolyphosphate, cerium powder and molybdenum powder are added, secondary vacuumizing is carried out when the temperature is raised to 140 ℃, the vacuum degree is set to be-0.01 +/-0.01 MPa, and the vacuumizing time is 30-60min to obtain a sizing material;

and step three, pouring the rubber material into a mold, and cooling and forming.

In the step (b), the temperature rise rate is 2-3 deg.C/min.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

the silicone rubber is added with various materials for use, so that the oil resistance of the silicone rubber is effectively improved, and the production cost is reduced.

Detailed Description

For purposes of clarity and a complete description of the present invention, and to provide further clarity and understanding of the objects, technical solutions and advantages thereof, it is to be understood that the terms "center", "vertical", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like are used in an illustrative, positional or other orientation, and are used for convenience in describing and simplifying the present invention, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the present invention.