CN103408797B - Modified calcium carbonate for floor tiles and preparation method thereof - Google Patents

Abstract

The invention provides a modified calcium carbonate for floor tiles, which is prepared from the following raw materials in parts by weight: 95-100 parts of 400-mesh ground calcium carbonate, 0.2-0.4 part of magnesium oxide, 0.1-0.4 part of sodium tripolyphosphate, 0.1-0.2 part of silane coupling agent, 2-4 parts of fatty glyceride, 0.3-0.5 part of beryllium oxide, 1-3 parts of EVA (ethylene-vinyl acetate) resin, 0.2-0.4 part of molybdenum oxide, 0.6-0.8 part of hollow glass microsphere and 0.8-1.0 part of bamboo charcoal. 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 and favorable heat insulation property, and can lower the cost and enhance the working properties and heat insulation property of the product when being used in floor tiles.

Description

A kind of floor tile modified calcium carbonate and preparation method thereof

Technical field

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

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

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

400 order water-ground limestone 95-100, magnesium oxide 0.2-0.4, tripoly phosphate sodium STPP 0.1-0.4, Silane coupling agent KH550 0.1-0.2, glycerin fatty acid ester 2-4, beryllium oxide 0.3-0.5, EVA resin 1-3, molybdenum oxide 0.2-0.4, hollow glass micropearl 0.6-0.8, bamboo-carbon fibre 0.8-1.0.

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

(1) first water-ground limestone and magnesium oxide are mixed, then at 90-100 DEG C, dry to moisture content less than 0.5%, join in homogenizer;

(2) tripoly phosphate sodium STPP, Silane coupling agent KH550, glycerin fatty acid ester, beryllium oxide, EVA resin are first mixed, then join in calcium carbonate, at temperature is 85-90 DEG C, rotating speed 900-1000 rev/min, high-speed stirring 5-6 minute;

(3) by rest materials molybdenum oxide, hollow glass micropearl, bamboo-carbon fibre, join in the compound of step (2), be warming up to 100-110 DEG C, under the speed of 1300-1500 rev/min, stir 8-10 minute, be incubated after 10-15 minute, then with the speed of 1200-1300 rev/min, stir 4-6 minute, then, allow its self-heating cool to room temperature, dry, grind 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 floor tile raw material, the add-on of filler can be improved, reduce material cost; Substantially increase the heat-proof quality of floor tile by adding a small amount of hollow glass micropearl when modification, improve mobility and the processing characteristics of system simultaneously, heat preservation and insulation improves, and gives goods good physical and mechanical properties, reaches toughened and reinforced effect.

Embodiment

A preparation method for floor tile modified calcium carbonate,

First by weight (kg) takes 400 order water-ground limestones 100, magnesium oxide 0.3, tripoly phosphate sodium STPP 0.2, Silane coupling agent KH550 0.1, glycerin fatty acid ester 3, beryllium oxide 0.4, EVA resin 2, molybdenum oxide 0.3, hollow glass micropearl 0.6, bamboo-carbon fibre 1, then follows these steps to preparation:

(1) first water-ground limestone and magnesium oxide are mixed, then at 90-100 DEG C, dry to moisture content less than 0.5%, join in homogenizer;

(2) tripoly phosphate sodium STPP, Silane coupling agent KH550, glycerin fatty acid ester, beryllium oxide, EVA resin are first mixed, then join in calcium carbonate, at temperature is 85-90 DEG C, rotating speed 900-1000 rev/min, high-speed stirring 5-6 minute;

(3) by rest materials molybdenum oxide, hollow glass micropearl, bamboo-carbon fibre, join in the compound of step (2), be warming up to 100-110 DEG C, under the speed of 1300-1500 rev/min, stir 8-10 minute, be incubated after 10-15 minute, then with the speed of 1200-1300 rev/min, stir 4-6 minute, then, allow its self-heating cool to room temperature, dry, grind to form nanometer powdery.

testing data:

the Performance Detection of modified calcium carbonate of the present invention and ordinary calcium carbonate is compared as follows:

Examination criteria:

GB/T1040-92 plastic tensile test method;

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

GB/T1043-93 plastics charpy impact test method;

First measure the tap density of the forward and backward calcium carbonate of modification, then calcium carbonate good for modification and unmodified water-ground limestone are joined in pvc resin in the ratio of 30% respectively, make batten, 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; Every mechanical property of modified calcium carbonate raising can be obtained for as apparent from table 1.

Claims (1)

1. a floor tile modified calcium carbonate, is characterized in that, is prepared from by the feed composition of following weight part:

400 order water-ground limestone 95-100, magnesium oxide 0.2-0.4, tripoly phosphate sodium STPP 0.1-0.4, Silane coupling agent KH550 0.1-0.2, glycerin fatty acid ester 2-4, beryllium oxide 0.3-0.5, EVA resin 1-3, molybdenum oxide 0.2-0.4, hollow glass micropearl 0.6-0.8, bamboo-carbon fibre 0.8-1.0;

The preparation method of described floor tile modified calcium carbonate, concrete operations are:

(1) first water-ground limestone and magnesium oxide are mixed, then at 90-100 DEG C, dry to moisture content less than 0.5%, join in homogenizer;

(2) tripoly phosphate sodium STPP, Silane coupling agent KH550, glycerin fatty acid ester, beryllium oxide, EVA resin are first mixed, then join in calcium carbonate, at temperature is 85-90 DEG C, rotating speed 900-1000 rev/min, high-speed stirring 5-6 minute;

(3) by rest materials molybdenum oxide, hollow glass micropearl, bamboo-carbon fibre, join in the compound of step (2), be warming up to 100-110 DEG C, under the speed of 1300-1500 rev/min, stir 8-10 minute, be incubated after 10-15 minute, then with the speed of 1200-1300 rev/min, stir 4-6 minute, then, allow its self-heating cool to room temperature, dry, grind to form nanometer powdery.