Modified calcium carbonate powder applied to silicone adhesive and preparation method thereof

By modifying heavy calcium carbonate powder and combining the use of specific additives, the problems of low whiteness and high cost of calcium carbonate powder in the prior art are solved, and the preparation of high-grade silicone glue is realized, and the dispersion and extrusion of the powder are improved.

CN119684819APending Publication Date: 2025-03-25SHANDONG JINSHENG NEW MATERIAL CO LTD
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Patent Information

Application Number
CN202411858032.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-17
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

In the prior art, calcium carbonate powder used in silicone glue has problems such as low whiteness, high cost, weak lipophilicity, large bulk density and high oil absorption value, which is difficult to meet the use needs of high-end silicone glue.

Method used

Heavy calcium carbonate powder is used to modify it with specific additives (such as N,N'-ethylene bisstearamide, glycerin, aluminate coupling agent, castor oil derivative, dispersant and rheological agent). By adjusting the ratio and process steps, the whiteness, lipophilicity and dispersion of the calcium carbonate powder are improved.

Benefits of technology

The modified calcium carbonate powder has high whiteness, low cost, strong lipophilicity, low bulk density and low oil absorption value. It is suitable for the preparation of high-end silicone glue, and improves the dispersion and extrusion properties of silicone glue.

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Abstract

The invention discloses modified calcium carbonate powder applied to silicone adhesive and a preparation method of the modified calcium carbonate powder, and relates to the technical field of calcium carbonate powder modification, the modified calcium carbonate powder comprises heavy calcium carbonate powder and an additive for modifying the heavy calcium carbonate powder; the additives comprise N, N '-ethylene bis stearamide, glycerol, an aluminate coupling agent, a castor oil derivative, a dispersing agent and a rheological agent; the calcium carbonate filler has the characteristics of high whiteness, low cost, strong lipophilicity, small stacking density, low oil absorption value and the like, and the silicone adhesive produced by using the calcium carbonate filler has the advantages of good fluidity, good thixotropy, good extrudability of the finished product adhesive and outstanding mechanical properties, and is a high-quality calcium carbonate filling filler for producing the silicone adhesive.
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