Preparation method of superfine calcium carbonate modified rubber material

Abstract

The invention discloses a preparation method of a superfine calcium carbonate modified rubber material and belongs to the technical field of preparation of rubber composite materials. The preparation method comprises the steps of carrying out surface modification on super-fine calcium carbonate; plasticating natural rubber NR; burdening ingredients and mixing; preparing a rubber compound film; and carrying out vulcanization treatment on the rubber compound film. By adopting a silane coupling agent to treat superfine calcium carbonate powder and introducing double bond groups onto the surface of the superfine calcium carbonate powder, methyl methacrylate is subjected to free radical polymerization to obtain superfine calcium carbonate / silane coupling agent / methyl methacrylate composite particles in the presence of superfine calcium carbonate / the silane coupling agent. In addition, the rubber is filled with calcium carbonate subjected to grafted modification, so that mechanical properties of the grafted modification system are superior to those of an unmodified filling system; superfine calcium carbonate is dispersed more uniformly in a rubber matrix, and further the compatibility of calcium carbonate and the rubber is improved as well as the use amount of raw rubber is reduced and the cost of products is reduced.

Description

technical field

[0001] The invention belongs to the technical field of rubber composite material preparation, and in particular relates to a preparation method of ultrafine calcium carbonate modified rubber material. Background technique

[0002] Composite materials are heterogeneous materials composed of two or more materials with different physical and chemical properties in a microscopic or macroscopic form. Because of pure natural rubber or synthetic rubber, whether it is unvulcanized raw rubber or vulcanized rubber, its physical and mechanical properties are very poor and it is difficult to meet the requirements of use. Therefore, compounding is one of the inevitable trends in the development of rubber materials. Contents of the invention

[0003] According to the problems existing in the prior art, the invention provides a preparation method of ultrafine calcium carbonate modified rubber material, which makes the dispersion of ultrafine calcium carbonate in the rubb...