CN103408802A - Modified calcium carbonate for artificial marble and preparation method thereof - Google Patents

Abstract

The invention provides a modified calcium carbonate for artificial marble, which is prepared from the following raw material components in parts by weight: 325 mesh heavy calcium carbonate 95-100, stearic acid 1-2, diffusing agent MF0.1-0.2, Tween-800.3-0.5, ferrocene 0.2-0.4, sodium hexametaphosphate 0.5-0.7, triethylhexyl phosphoric acid 0.3-0.4, triphenyl phosphite 0.1-0.2, 2.4.6-tris(dimethylaminomethyl base) phenol 0.2-0.4, dioctyl sebacate 2-4, ethylenediamine 0.3-0.5, phenolic resin 1-3, hollow glass microspheres 0.5-1, attapulgite 0.2-0.4, isopropyl dihard Fatty acyloxyaluminate 1-2. First mix part of the materials, dry the miscellaneous sauce calcium carbonate, then mix, then add other raw materials in proportion to order, mix fully in a high-speed mixer, dry and grind. The modified calcium carbonate obtained by the invention has good dispersibility, good anti-aging and flame-retardant properties, can be used in artificial marble, can reduce costs, and at the same time improve various processing properties and heat insulation properties of products.

Description

A kind of modified calcium carbonate for artificial marble and preparation method thereof

technical field

The present invention relates to the field of inorganic fillers, in particular to a modified calcium carbonate for artificial marble and a preparation method thereof.

Background technique

Ground calcium carbonate is a commonly used inorganic filler. It is widely used in rubber, plastics, coatings and other fields due to its wide source and low price. However, the surface of heavy calcium carbonate is hydrophilic and oleophobic, the specific surface area is large, the surface energy is high, and the particles are easily agglomerated. When directly or in large quantities filled in organic matrix materials, it is not only difficult to disperse evenly, but also has a weak binding force with the matrix. , leading to two-phase interface defects and some performance degradation of composite materials. Therefore, in order to broaden its application field, it is necessary to modify the surface of heavy calcium carbonate to make its surface lipophilic and hydrophobic, enhance the compatibility with the organic matrix, improve the dispersion in the organic matrix, and improve and enhance the composite material. performance.

Contents of the invention

The invention provides a modified calcium carbonate for artificial marble and a preparation method thereof.

The technical scheme that the present invention adopts is as follows:

A modified ground calcium carbonate for artificial marble is characterized in that it is prepared from the following raw material components in parts by weight:

325 mesh heavy calcium carbonate 95-100, stearic acid 1-2, diffusing agent MF0.1-0.2, Tween-80 0.3-0.5, ferrocene 0.2-0.4, sodium hexametaphosphate 0.5-0.7, triethyl Hexyl phosphoric acid 0.3-0.4, triphenyl phosphite 0.1-0.2, 2.4.6-tris(dimethylaminomethyl)phenol 0.2-0.4, dioctyl sebacate 2-4, ethylenediamine 0.3-0.5, Phenolic resin 1-3, hollow glass microsphere 0.5-1, attapulgite 0.2-0.4, isopropyl distearoyloxy aluminate 1-2.

The preparation method of described modified calcium carbonate for artificial marble is characterized in that: specific operation is:

(1) Put dioctyl sebacate, ethylenediamine, hollow glass microspheres, attapulgite and phenolic resin into a high-speed mixer and mix thoroughly;

(2) Dry the calcium carbonate at 60-70°C until the moisture content is below 0.4%;

(3) Add the materials obtained in steps (1) and (2) into a high-speed mixer, mix at high speed for 3-4 minutes, and then add stearic acid, diffusing agent MF, Tween-80, ferrocene, Add sodium hexametaphosphate, stir for 4-5 minutes at a temperature of 85-95°C, at a speed of 800-900 rpm;

(4) Then heat up to 100-110°C, stir for 8-10 minutes at a speed of 1300-1500 rpm, keep warm for 10-15 minutes, then add all the remaining raw materials into the high-speed mixer, and mix at 1200-1500 rpm Stir at 1300 rpm at 90-100°C for 6-8 minutes, then let it cool down to room temperature, dry it, and grind it into nano-powder.

Beneficial effects of the present invention:

The present invention adds a variety of surface treatment agents and functional additives on the basis of the modification of the existing heavy calcium carbonate. The obtained modified calcium carbonate has a particle size of less than 0.1um, uniform particle size, large specific surface area, and greatly improved application performance. Superior to the characteristics of ordinary calcium carbonate, the obtained modified calcium carbonate has good dispersibility and compatibility in the production of ceiling raw materials, which can increase the amount of filler added and reduce the cost of raw materials; when modifying, add a small amount of hollow glass microspheres , Attapulgite greatly improves the heat insulation performance of artificial marble, and at the same time improves the fluidity and processing performance of the system, improves the heat insulation performance, and endows the product with better physical and mechanical properties, achieving the effect of toughening and strengthening.

Detailed ways

A preparation method of modified calcium carbonate for artificial marble,

First weigh 325 mesh heavy calcium carbonate 100, stearic acid 2, diffusing agent MF0.1, Tween-80 0.4, ferrocene 0.2, sodium hexametaphosphate 0.6, triethylhexyl phosphoric acid 0.4, Triphenyl phosphite 0.1, 2.4.6-tris(dimethylaminomethyl)phenol 0.4, dioctyl sebacate 3, ethylenediamine 0.4, phenolic resin 2, hollow glass microspheres 0.6, attapulgite 0.2 , Isopropyl distearoyloxy aluminate 2, prepared according to the following steps:

(1) Put dioctyl sebacate, ethylenediamine, hollow glass microspheres, attapulgite and phenolic resin into a high-speed mixer and mix thoroughly;

(2) Dry the calcium carbonate at 60-70°C until the moisture content is below 0.4%;

(3) Add the materials obtained in steps (1) and (2) into a high-speed mixer, mix at high speed for 3-4 minutes, and then add stearic acid, diffusing agent MF, Tween-80, ferrocene, Add sodium hexametaphosphate, stir for 4-5 minutes at a temperature of 85-95°C, at a speed of 800-900 rpm;

(4) Then heat up to 100-110°C, stir for 8-10 minutes at a speed of 1300-1500 rpm, keep warm for 10-15 minutes, then add all the remaining raw materials into the high-speed mixer, and mix at 1200-1500 rpm Stir at 1300 rpm at 90-100°C for 6-8 minutes, then let it cool down to room temperature, dry it, and grind it into nano-powder. the

Test Data:

Refer to the following standards:

GB/T1040—92 plastic tensile test method;

GB/T9341—2000 plastic bending performance test method;

GB/T1043—93 Plastic simply supported beam impact test method

The modified calcium carbonate and the unmodified heavy calcium carbonate were added to the resin at a ratio of 30%, respectively, to make a sample, and the mechanical properties of the two were tested respectively. The comparison results are shown in Table 1 below.

Table 1

As can be seen from Table 1, the loose bulk density of the modified calcium carbonate becomes smaller, indicating that the calcium carbonate is fully dispersed, and the smaller the agglomeration phenomenon occurs when it is added to other materials, the better the dispersion, and the better the modification effect; It can be seen that the mechanical properties of the modified calcium carbonate have been improved.

Claims (2)

1. a modified ground calcium carbonate for artificial marble, is characterized in that, is prepared from the raw material component of following weight part: 325 mesh heavy calcium carbonate 95-100, stearic acid 1-2, diffusing agent MF0.1-0.2, Tween-80 0.3-0.5, ferrocene 0.2-0.4, sodium hexametaphosphate 0.5-0.7, triethyl Hexyl phosphoric acid 0.3-0.4, triphenyl phosphite 0.1-0.2, 2.4.6-tris(dimethylaminomethyl)phenol 0.2-0.4, dioctyl sebacate 2-4, ethylenediamine 0.3-0.5, Phenolic resin 1-3, hollow glass microsphere 0.5-1, attapulgite 0.2-0.4, isopropyl distearoyloxy aluminate 1-2. 2. the preparation method of modified calcium carbonate for artificial marble according to claim 1, is characterized in that: concrete operation is: (1) Put dioctyl sebacate, ethylenediamine, hollow glass microspheres, attapulgite and phenolic resin into a high-speed mixer and mix thoroughly; (2) Dry the calcium carbonate at 60-70°C until the moisture content is below 0.4%; (3) Add the materials obtained in steps (1) and (2) into a high-speed mixer, mix at high speed for 3-4 minutes, and then add stearic acid, diffusing agent MF, Tween-80, ferrocene, Add sodium hexametaphosphate, stir for 4-5 minutes at a temperature of 85-95°C, at a speed of 800-900 rpm; (4) Then heat up to 100-110°C, stir for 8-10 minutes at a speed of 1300-1500 rpm, keep warm for 10-15 minutes, then add all the remaining raw materials into the high-speed mixer, and mix at 1200-1500 rpm Stir at 1300 rpm at 90-100°C for 6-8 minutes, then let it cool down to room temperature, dry it, and grind it into nano-powder.