Rubber film separant

Abstract

The invention provides a rubber film separant. The rubber film separant is prepared from raw materials in parts by weight as follows: 10-40 parts of calcium stearate, 20-50 parts of inorganic filler, 5-20 parts of a surfactant, 1-10 parts of inorganic gel, 1-10 parts of hydroxymethyl cellulose and 1-10 parts of a defoaming agent. The rubber film separant is white or off-white fine powder, the PH value of a 2% aqueous dispersion is 8-10, and the solid content is calculated in the following steps: a sample in the weight of 2 g (accurate to 0.01 g) is taken from a low weighing bottle with a decrement method, and the weighing bottle with the opening open is put into an oven at the temperature of 105 DEG C and baked for 2 h, then taken out, put into a dryer to be cooled for 30 min and then weighed. The percent of remaining of the rubber film separant is higher than 80%, the dispersity is good in cold water or hot water in the concentration being 2%-6% at the temperature of 10-90 DEG C, the rubber film separant does not settle after being dissolved or diluted in water, no cakes are left on the surface of a rubber film, so that smooth progressing of following compositing is guaranteed, and the rubber film separant which guarantees non-viscosity and increases the cooling and drying speed of the rubber film can uniformly cover the surface of the rubber film.

Description

technical field [0001] The invention relates to a rubber film release agent, which is used for isolating and cooling rubber films during the rubber mixing process. Background technique [0002] At present, the commercially available rubber film release agents mainly have the following deficiencies: first, when the release agent is easily precipitated after being dissolved and diluted, the proper isolation effect cannot be achieved; It affects the compounding of the subsequent process, because the compounding effect of the agglomerated part is very poor; the third is that the surface of the rubber film cannot show the effect of uniform coverage, resulting in unstable isolation and low effect, and even affects cooling, drying speed, and drying time. Usually more than 40 minutes. Contents of the invention [0003] The task of the present invention is to provide a rubber film that does not precipitate after being dissolved or diluted in water, can avoid leaving agglomerates o...

AI Technical Summary

Problems solved by technology

[0002] At present, the commercially available rubber film release agents mainly have the following deficiencies: first, when the release agent is easily precipitated after being dissolved and diluted, the proper isolation effect cannot be achieved; It affects the compounding of the subsequent pro