Preparation method of single-component room-temperature-vulcanized silicone rubber

Abstract

The invention discloses a preparation method of single-component room-temperature-vulcanized silicone rubber. The method comprises the steps that: A, base rubber and calcium powder are well mixed; and the mixture is subjected to heating, stirring, and defoaming, such that a base material is prepared; B, casting stone powder, carbon black and silicone oil are well mixed; and the mixture is subjected to heating, stirring, and defoaming, such that a color paste is prepared; C, the base material and the color paste are cooled to room temperature; the materials are mixed and grinded; and the mixture is defoamed in a planetary stirring vessel; D, a cross-linking agent is added and the mixture is well mixed; defoaming is carried out; the cross-linking agent is added again and the mixture is well mixed; and defoaming is carried out; and E, a thickening agent and a catalyst are added, and the mixture is well mixed; defoaming is carried out; and the material is filtered and discharged, such that the single-component room-temperature-vulcanized silicone rubber is obtained. The method provided by the invention has the advantages that: the obtained product has excellent performances and high anti-corrosion performance.

Description

Technical field

[0001] The invention relates to the field of organic silicon sealant manufacturing, in particular to a preparation method of one-component room temperature vulcanized silicone rubber. Background technique

[0002] Silicone rubber has the characteristics of excellent sealing performance, strong aging resistance, strong adhesion, high and low temperature resistance and non-toxicity, which makes silicone rubber can be widely used in construction, electronics, automotive, military, aerospace and solar photovoltaic industries. However, the existing silicone rubber has weak corrosion resistance. If the actual environment of the silicone rubber product is corrosive (for example, the silicone rubber sealant used on the exterior wall of the building is corroded by acid rain), it will cause the product to fall off or Peeling, seriously shortening the life of the product, brings inconvenience to production and life.

[0003] Cast stone powder, also known as chlorpyroxene powd...