Method for preparing powdered rubber in stuffing type with extra fine calcium carbonate

Abstract

A superfine calcium carbonate filled powdered rubber is prepared from dry rubber, superfine calcium carbonate, surfactant, operating oil, antioxidant, emulsifier, coagulant and deionized water through proportioning, emulsifying, heat treating, coagulating and post-treating. Its advantages are high coating effect, high pulverizing rate (99% or more), and high mechanical performance, flowability and storage stability of product.

Description

[0001] The invention relates to the field of powdered rubber (Powdered Rubber) preparation, in particular to a method for preparing ultrafine calcium carbonate filled powdered rubber (Ultra-fine calcium carbonate extended powdered rubber). Background technique

[0002] Powder rubber generally refers to raw rubber particles with a particle size of less than 1.0mm and good fluidity. It is a new type of rubber raw material used to replace traditional block rubber. It is processed by injection, extrusion, molding, etc. by special equipment. method or use the existing rubber processing equipment to process vulcanized rubber products with traditional processing methods, which can save energy and time, reduce equipment investment, and reduce production costs. It is conducive to automatic control of the production process, improving mixing quality, and reducing labor intensity. No significant effects such as environmental pollution. The emergence and applicati...

Examples

Embodiment

[0038] (1) Material preparation

[0039] Prepare materials according to the proportioning in Table 1.

[0040] Reagent consumption and process condition of the embodiment of table 1

[0041] (2) Emulsification of ultrafine calcium carbonate

[0042] According to the formula listed in Table 1, add 50 kg of water and surfactant OP-10 to a 100-liter stirring tank, and stir at a medium speed. After the OP-10 is completely dissolved, add ultra-fine calcium carbonate into the stirring, and continue stirring 10 to 30 minutes, so that the superfine calcium carbonate and the surfactant solution form a uniform suspension.

[0043] (three) heat treatment of latex

[0044] Add metered deionized water to the latex, adjust the solid content of the latex to 7-15%, add the above-mentioned superfine calcium carbonate suspension into the latex while stirring, heat the system in a water bath to 70-90°C after mixing evenly, press For the formula listed in Table 1, add a measure...

[0001] The invention relates to the field of powdered rubber (Powdered Rubber) preparation, in particular to a method for preparing ultrafine calcium carbonate filled powdered rubber (Ultra-fine calcium carbonate extended powdered rubber). Background technique

[0002] Powder rubber generally refers to raw rubber particles with a particle size of less than 1.0mm and good fluidity. It is a new type of rubber raw material used to replace traditional block rubber. It is processed by injection, extrusion, molding, etc. by special equipment. method or use the existing rubber processing equipment to process vulcanized rubber products with traditional processing methods, which can save energy and time, reduce equipment investment, and reduce production costs. It is conducive to automatic control of the production process, improving mixing quality, and reducing labor intensity. No significant effects such as environmental pollution. The emergence and applicati...

Examples

Embodiment

[0038] (1) Material preparation

[0039] Prepare materials according to the proportioning in Table 1.

[0040] Reagent consumption and process condition of the embodiment of table 1

[0041] (2) Emulsification of ultrafine calcium carbonate

[0042] According to the formula listed in Table 1, add 50 kg of water and surfactant OP-10 to a 100-liter stirring tank, and stir at a medium speed. After the OP-10 is completely dissolved, add ultra-fine calcium carbonate into the stirring, and continue stirring 10 to 30 minutes, so that the superfine calcium carbonate and the surfactant solution form a uniform suspension.

[0043] (three) heat treatment of latex

[0044] Add metered deionized water to the latex, adjust the solid content of the latex to 7-15%, add the above-mentioned superfine calcium carbonate suspension into the latex while stirring, heat the system in a water bath to 70-90°C after mixing evenly, press For the formula listed in Table 1, add a measure...