CN103408802B - 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 materials in parts by weight: 95-100 parts of 325-mesh ground calcium carbonate, 1-2 parts of stearic acid, 0.1-0.2 part of diffusant MF, 0.3-0.5 part of Tween-80, 0.2-0.4 part of ferrocene, 0.5-0.7 part of sodium hexametaphosphate, 0.3-0.4 part of triethylhexyl phosphoric acid, 0.1-0.2 part of triphenyl phosphite, 0.2-0.4 part of 2,4,6-tri(dimethylaminomethyl)phenol, 2-4 parts of dioctyl sebacate, 0.3-0.5 part of ethylenediamine, 1-3 parts of phenolic resin, 0.5-1 part of hollow glass microsphere, 0.2-0.4 part of attapulgite and 1-2 parts of isopropyldistearoyloxy aluminate. The preparation method comprises the following steps: mixing part of materials, drying calcium carbonate, mixing, proportionally and sequentially adding the other raw materials in batches, thoroughly mixing in a high-speed stirrer, drying and grinding. The modified calcium carbonate provided by the invention has the advantages of favorable dispersity, favorable aging resistance and favorable flame retardancy, and can lower the cost and enhance the working properties and heat-insulating property of the product when being used in artificial marble.

Description

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

Technical field

The present invention relates to mineral filler field, be specifically related to a kind of artificial marble modified calcium carbonate and preparation method thereof.

Background technology

Water-ground limestone is a kind of conventional mineral filler, because of wide, the low price of originating etc., is widely used in the fields such as rubber, plastics, coating.But water-ground limestone surface hydrophilic oleophobic, specific surface area is large, surface energy is high, very easily reunite between particle, when directly or a large amount of fill in organic basis material time, not only be difficult to disperse equably, and very weak with the bonding force of matrix, cause some degradation of two-phase interface defect, matrix material.Therefore, in order to widen its Application Areas, modification must be carried out to heavy calcium carbonate surface, making its surperficial oleophilic drainage, strengthen the consistency with organic matrix, improve the dispersiveness in organic matrix, improve the performance of matrix material.

Summary of the invention

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

The technical solution used in the present invention is as follows:

A kind of artificial marble modified heavy calcium carbonate, is characterized in that, be prepared from by the feed composition of following weight part:

325 order water-ground limestone 95-100, stearic acid 1-2, dispersing agent MF 0.1-0.2, Tween-80 0.3-0.5, ferrocene 0.2-0.4, Sodium hexametaphosphate 99 0.5-0.7, triethyl hexyl phosphoric acid 0.3-0.4, triphenyl phosphite 0.1-0.2,2.4.6-tri-(dimethylamino methyl) phenol 0.2-0.4, dioctyl sebacate 2-4, quadrol 0.3-0.5, resol 1-3, hollow glass micropearl 0.5-1, attapulgite 0.2-0.4, sec.-propyl distearyl acyloxy Aluminate 1-2.

The preparation method of described artificial marble modified calcium carbonate, is characterized in that: concrete operations are:

(1) first dioctyl sebacate, quadrol, hollow glass micropearl, attapulgite and resol are put into homogenizer, fully mix;

(2) calcium carbonate is dried to moisture less than 0.4% at 60-70 DEG C;

(3) material of step (1), (2) gained is joined in homogenizer, after high-speed mixing 3-4 minute, again by stearic acid, dispersing agent MF, Tween-80, ferrocene, the Sodium hexametaphosphate 99 in formula, add wherein, at temperature is 85-95 DEG C, rotating speed 800-900 rev/min, stirs 4-5 minute;

(4) then 100-110 DEG C is warming up to, under the speed of 1300-1500 rev/min, stir 8-10 minute, be incubated after 10-15 minute, again remaining raw material is all added in homogenizer, at 1200-1300 rev/min, stir 6-8 minute at temperature 90-100 DEG C, then, allow its self-heating cool to room temperature, drying, grinds to form nanometer powdery.

Beneficial effect of the present invention:

The present invention with the addition of kinds of surface treatment agent and functional agent on the basis of existing water-ground limestone modification, the modified calcium carbonate of gained has particle diameter and is less than 0.1um, size of particles is even, specific surface area is large, the feature that application performance is better than ordinary calcium carbonate greatly, the modified calcium carbonate that obtains are dispersed and consistency is good in production top ceiling raw material, the add-on of filler can be improved, reduce material cost; When modification by adding a small amount of hollow glass micropearl, attapulgite, substantially increase the heat-proof quality of artificial marble, improve mobility and the processing characteristics of system simultaneously, heat-proof quality improves, and give goods good physical and mechanical properties, reach toughened and reinforced effect.

Embodiment

A preparation method for artificial marble modified calcium carbonate,

First by weight (kg) takes 325 order water-ground limestones 100, stearic acid 2, dispersing agent MF 0.1, Tween-80 0.4, ferrocene 0.2, Sodium hexametaphosphate 99 0.6, triethyl hexyl phosphoric acid 0.4, triphenyl phosphite 0.1,2.4.6-tri-(dimethylamino methyl) phenol 0.4, dioctyl sebacate 3, quadrol 0.4, resol 2, hollow glass micropearl 0.6, attapulgite 0.2, sec.-propyl distearyl acyloxy Aluminate 2, follow these steps to preparation:

(1) first dioctyl sebacate, quadrol, hollow glass micropearl, attapulgite and resol are put into homogenizer, fully mix;

(2) calcium carbonate is dried to moisture less than 0.4% at 60-70 DEG C;

(3) material of step (1), (2) gained is joined in homogenizer, after high-speed mixing 3-4 minute, again by stearic acid, dispersing agent MF, Tween-80, ferrocene, the Sodium hexametaphosphate 99 in formula, add wherein, at temperature is 85-95 DEG C, rotating speed 800-900 rev/min, stirs 4-5 minute;

(4) then 100-110 DEG C is warming up to, under the speed of 1300-1500 rev/min, stir 8-10 minute, be incubated after 10-15 minute, again remaining raw material is all added in homogenizer, at 1200-1300 rev/min, stir 6-8 minute at temperature 90-100 DEG C, then, allow its self-heating cool to room temperature, drying, grinds to form nanometer powdery.

testing data:

With reference to following standard:

GB/T1040-92 plastic tensile test method;

GB/T9341-2000 Plastics-Oetermination of flexural properties method;

GB/T1043-93 plastics charpy impact test method

The calcium carbonate that modification is good and unmodified water-ground limestone join in resin in the ratio of 30% respectively, make batten, and the mechanical property respectively both test, comparing result sees the following form 1.

Table 1

As can be seen from Table 1, the loose bulk density of modified calcium carbonate diminishes, and illustrates that calcium carbonate split fully disperses, and joins that in other material, agglomeration to occur less, and good dispersity, illustrates that modified effect is good; It can also be seen that every mechanical property of modified calcium carbonate is all improved.

Claims (1)

1. an artificial marble modified heavy calcium carbonate, is characterized in that, is prepared from by the feed composition of following weight part:

325 order water-ground limestone 95-100, stearic acid 1-2, dispersing agent MF 0.1-0.2, Tween-80 0.3-0.5, ferrocene 0.2-0.4, Sodium hexametaphosphate 99 0.5-0.7, triethyl hexyl phosphoric acid 0.3-0.4, triphenyl phosphite 0.1-0.2,2.4.6-tri-(dimethylamino methyl) phenol 0.2-0.4, dioctyl sebacate 2-4, quadrol 0.3-0.5, resol 1-3, hollow glass micropearl 0.5-1, attapulgite 0.2-0.4, sec.-propyl distearyl acyloxy Aluminate 1-2;

The preparation method of described artificial marble modified heavy calcium carbonate, concrete operations are:

(1) first dioctyl sebacate, quadrol, hollow glass micropearl, attapulgite and resol are put into homogenizer, fully mix;

(2) water-ground limestone is dried to moisture less than 0.4% at 60-70 DEG C;

(3) material of step (1), (2) gained is joined in homogenizer, after high-speed mixing 3-4 minute, again by stearic acid, dispersing agent MF, Tween-80, ferrocene, the Sodium hexametaphosphate 99 in formula, add wherein, at temperature is 85-95 DEG C, rotating speed 800-900 rev/min, stirs 4-5 minute;

(4) then 100-110 DEG C is warming up to, under the speed of 1300-1500 rev/min, stir 8-10 minute, be incubated after 10-15 minute, again remaining raw material is all added in homogenizer, at 1200-1300 rev/min, stir 6-8 minute at temperature 90-100 DEG C, then, allow its self-heating cool to room temperature, drying, grinds to form nanometer powdery.