Modified calcium carbonate filler with favorable sound absorption and sound insulation effects and preparation method thereof

Abstract

The invention discloses a modified calcium carbonate filler with favorable sound absorption and sound insulation effects and a preparation method thereof. The invention is characterized in that the modified calcium carbonate filler is prepared from the following raw materials in parts by weight: 100-150 parts of calcium carbonate, 30-50 parts of sodium oleate, 0.3-0.7 part of sodium dodecyl benzene sulfonate, 1-3 parts of sodium bicarbonate, 4-8 parts of styrene, 0.02-0.05 part of potassium persulfate, 3-5 parts of vapor-phase silicon dioxide, 2-3 parts of organobentonite, 3-5 parts of nitrile-butadiene rubber powder, 3-4 parts of elacostearic acid, 2-3 parts of intumescent mica powder and a right amount of deionized water. The compounding of the nitrile-butadiene rubber powder, elacostearic acid and intumescent mica powder greatly enhances the functions of damping, shock absorption, sound absorption and sound insulation of the calcium carbonate. The modified calcium carbonate filler has the advantages of scientific and reasonable design, simple technique, high safety and reliability, low production cost and the like, and is easy to control, convenient to operate and suitable for large-scale production.

Description

technical field [0001] The invention relates to the field of industrial fillers, in particular to a modified calcium carbonate filler with good sound-absorbing and sound-insulating effects and a preparation method thereof. Background technique [0002] As a filler for rubber and plastic products, calcium carbonate can improve the heat resistance, wear resistance, dimensional stability, rigidity and processability of the product, and reduce the cost of the product, but its surface has hydroxyl groups with strong hydrophilicity. It presents a strong alkalinity. This hydrophilic and oleophobic property makes the affinity between calcium carbonate and organic polymers poor, and it is easy to form aggregates, resulting in uneven dispersion in the polymer, resulting in two materials. The effect of direct application is not good, and calcium carbonate is used as a filler, and its acid resistance, smoothness, whiteness and other properties need to be further improved. Therefore, in ...

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Problems solved by technology

[0002] As a filler for rubber and plastic products, calcium carbonate can improve the heat resistance, wear resistance, dimensional stability, rigidity and processability of the product, and reduce the cost of the product, but its surface has hydroxyl groups with strong hydrophilicity. It presents a strong alkalinity. This hydrophilic and oleophobic property makes the affinity between calcium carbonate and organic polymers poor, and it is easy to form aggregates, resulting in uneven dispersion in the polymer, resulting in two materials. The effect of direct application is not good, and calcium carbonate is used as a filler, and its acid resistance, smoothness, whiteness and other properties need to be further improved. Therefore, in order to improve the reinforcing effect of calcium carbonate and the dispersion performance in composite materials And the physical properties of modified calcium carbonate filled composite materials, it is necessary to use different surface modifiers and treatment methods to modify the surface of calcium carbonate powder, thereby broadening the application field of calcium carbonate