CN103408797A - 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 the 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 mineral filler commonly used, and, low price wide because originating etc., be widely used in the fields such as rubber, plastics, coating.But water-ground limestone surface hydrophilic oleophobic, specific surface area are large, surface can be high, very easily reunite between particle, when directly or in a large number filling in organic basis material, 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, must make its surperficial oleophilic drainage to the water-ground limestone modifying surface, the consistency of enhancing and organic matrix, improve the dispersiveness in organic matrix, improves 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, 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 described floor tile preparation method of modified calcium carbonate, it is characterized in that: concrete operations are:

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

(2) tripoly phosphate sodium STPP, Silane coupling agent KH550, glycerin fatty acid ester, beryllium oxide, EVA resin first being mixed, then join in calcium carbonate, is under 85-90 ℃ in temperature, 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 ℃, 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, drying, grind to form the nanometer powdery, get final product.

Beneficial effect of the present invention:

The present invention has added 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, application performance greatly be better than the characteristics of ordinary calcium carbonate, the modified calcium carbonate that obtains in producing the floor tile raw material dispersiveness and consistency good, can improve the add-on of filler, reduce material cost; When modification, greatly improved the heat-proof quality of floor tile by adding a small amount of hollow glass micropearl, mobility and the processing characteristics of system have been improved simultaneously, heat preservation and insulation improves, and gives goods physical and mechanical properties preferably, reaches toughened and reinforced effect.

Embodiment

A kind of floor tile preparation method of modified calcium carbonate,

At 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) at first water-ground limestone and magnesium oxide are mixed, then, under 90-100 ℃, dry to moisture content below 0.5%, join in homogenizer;

(2) tripoly phosphate sodium STPP, Silane coupling agent KH550, glycerin fatty acid ester, beryllium oxide, EVA resin first being mixed, then join in calcium carbonate, is under 85-90 ℃ in temperature, 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 ℃, 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, drying, grind to form the nanometer powdery, get final product.

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;

At first measure the tap density of the forward and backward calcium carbonate of modification, then the calcium carbonate that modification is good and unmodified water-ground limestone join in the pvc resin in 30% ratio respectively, make batten, test respectively both mechanical properties, and comparing result sees the following form 1.

Table 1

As can be seen from Table 1, the loose bulk density of the calcium carbonate after modification diminishes, and illustrates that the calcium carbonate split fully disperses, and joins in other material that agglomeration occurs is less, and good dispersity, illustrate that modified effect is good; From table 1, can find out obviously that every mechanical property of calcium carbonate all is improved after modification.

Claims (2)

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.

2. floor tile according to claim 1 is by the preparation method of modified calcium carbonate, and it is characterized in that: concrete operations are:

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

(2) tripoly phosphate sodium STPP, Silane coupling agent KH550, glycerin fatty acid ester, beryllium oxide, EVA resin first being mixed, then join in calcium carbonate, is under 85-90 ℃ in temperature, 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 ℃, 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, drying, grind to form the nanometer powdery, get final product.