CN104059391B - Surface-treated modified calcium carbonate and preparation method thereof - Google Patents

Abstract

The invention discloses a surface-treated modified calcium carbonate. The invention is characterized in that the surface-treated modified calcium carbonate is prepared from the following raw materials in parts by weight: 85-90 parts of calcium carbonate, 1-2 parts of glyceryl tristearate, 1.5-2.5 parts of polyaspartic acid, 3-5 parts of rosin resin, 4-6 parts of nylon 66, 1-1.5 parts of palmitic acid, 2-3 parts of pulverized monkey grass, 2-3 parts of mullite, 1-2 parts of hydroxypropyl cellulose, 0.8-1 part of titanate coupling agent TC-WT and 2.5-3.5 parts of modified titanium dioxide. The calcium carbonate surface is modified by the high-molecular polymer, so that the calcium carbonate has the high-molecular polymer layer; the calcium carbonate has many active groups, and thus, has favorable compatibility with many substances. For example, the unsaturated double bond can generate crosslinking reaction with the film-forming matters in the rubber, plastic and paint to generate very strong binding force, and the use of abundant calcium carbonate as the filler can not lower the properties of the product.

Description

A kind of surface treated modified calcium carbonate and preparation method thereof

Technical field

The present invention relates to industrial filler field, particularly a kind of surface treated modified calcium carbonate and preparation method thereof.

Background technology

Calcium carbonate is commonly used to the material such as filled plastics, rubber due to good stability, simple, the low abrasion of color and luster, easily processing, nontoxic, wide material sources, the plurality of advantages such as cheap, plays the effect of increase-volume, increment, reduction production cost.But easily reunite due to its surface hydrophilic oleophobic, different from the interfacial property of organic polymer, poor compatibility, directly or too much fills and easily causes material mechanical performance to decline.Its surface properties can be improved by modification, improve dispersed, with the over-all properties such as the physical strength of polymer interface consistency and material.

Summary of the invention

The object of this invention is to provide a kind of surface treated modified calcium carbonate and preparation method thereof.

In order to realize object of the present invention, the present invention is by following scheme implementation:

A kind of surface treated modified calcium carbonate, is made up of the raw material of following weight part: calcium carbonate 85-90, Tristearoylglycerol 1-2, poly aspartic acid 1.5-2.5, Gum Rosin 3-5, nylon66 fiber 4-6, palmitinic acid 1-1.5, pulverizing monkey grass 2-3, mullite 2-3, hydroxypropylcellulose 1-2, titanate coupling agent TC-WT0.8-1, modifying titanium dioxide 2.5-3.5;

Described modifying titanium dioxide is made up of the raw material of following weight part: nano titanium oxide 50-60, mica powder 2-4, pulverizing zeolite molecular sieve 4-6, ferrocene 5-7, mineral fibre 3-4, trisodium phosphate 2-3, pure-acrylic emulsion 3-4, epoxyoleic acid butyl ester 3-5, phosphoric acid ester 2-4, water 50-60; Preparation method be first add pure-acrylic emulsion, nano titanium oxide, mica powder, pulverizing zeolite molecular sieve, mineral fibre, water stirs, form suspension, then ferrocene, epoxyoleic acid butyl ester is added immediately, be heated to 120-140 DEG C, mix and blend 25-35 minute, is cooled to room temperature, then all the other remaining components are added, stir under 1200-1500 rev/min of condition, dry at 60-70 DEG C, be ground into ultrafine powder and get final product.

The surface treated modified calcium carbonate of one of the present invention, be made up of following concrete steps:

(1) calcium carbonate, pulverizing monkey grass, mullite, hydroxypropylcellulose, titanate coupling agent TC-WT are mixed and add in shredder, with the speed of 1500-2000 rev/min grinding 15-20 minute, take out and dry, pulverize porphyrize, cross 100-200 mesh sieve, obtain mixed powder stand-by;

(2) Gum Rosin, nylon66 fiber, palmitinic acid are put into mixing tank, be warming up between 80-90 DEG C, mix and blend half an hour, continue to add Tristearoylglycerol, poly aspartic acid, continue to be warming up to 130-160 DEG C, mix and pour out after 15-20 minute, obtain material modified;

(3) mixed powder is mixed with material modified, add suitable quantity of water, stir and grind 2-3 hour, form suspension stand-by;

(4) suspension is mixed with modifying titanium dioxide, stir 10-15 minute under 800-1000 rev/min, dry, be ground into 200-400 order powder and get final product.

The invention has the beneficial effects as follows: the present invention's high molecular polymer carries out modification to calcium carbonate surface, calcium carbonate is made to have high polymer layer, owing to having a lot of active group, therefore better with the consistency of many materials, the unsaturated double-bond such as contained can with the filmogen generation crosslinking reaction in rubber, plastics, coating, produce very strong bonding force, a large amount of fillers being used as them also can not reduce the performance of product.

Specific embodiments

Below by specific examples, the present invention is described in detail.

A kind of surface treated modified calcium carbonate, is made up of the raw material of following weight part (kilogram): calcium carbonate 85, Tristearoylglycerol 1, poly aspartic acid 1.5, Gum Rosin 3, nylon66 fiber 4, palmitinic acid 1, pulverizing monkey grass 2, mullite 2, hydroxypropylcellulose 1, titanate coupling agent TC-WT0.8, modifying titanium dioxide 2.5;

Described modifying titanium dioxide is made up of the raw material of following weight part (kilogram): nano titanium oxide 50, mica powder 2, pulverizing zeolite molecular sieve 4, ferrocene 5, mineral fibre 3, trisodium phosphate 2, pure-acrylic emulsion 3, epoxyoleic acid butyl ester 3, phosphoric acid ester 2, water 50; Preparation method be first add pure-acrylic emulsion, nano titanium oxide, mica powder, pulverizing zeolite molecular sieve, mineral fibre, water stirs, form suspension, then ferrocene, epoxyoleic acid butyl ester is added immediately, be heated to 120-140 DEG C, mix and blend 25-35 minute, is cooled to room temperature, then all the other remaining components are added, stir under 1200-1500 rev/min of condition, dry at 60-70 DEG C, be ground into ultrafine powder and get final product.

The surface treated modified calcium carbonate of one of the present invention, be made up of following concrete steps:

(1) calcium carbonate, pulverizing monkey grass, mullite, hydroxypropylcellulose, titanate coupling agent TC-WT are mixed and add in shredder, with the speed of 1500-2000 rev/min grinding 15-20 minute, take out and dry, pulverize porphyrize, cross 100-200 mesh sieve, obtain mixed powder stand-by;

(2) Gum Rosin, nylon66 fiber, palmitinic acid are put into mixing tank, be warming up between 80-90 DEG C, mix and blend half an hour, continue to add Tristearoylglycerol, poly aspartic acid, continue to be warming up to 130-160 DEG C, mix and pour out after 15-20 minute, obtain material modified;

(3) mixed powder is mixed with material modified, add suitable quantity of water, stir and grind 2-3 hour, form suspension stand-by;

(4) suspension is mixed with modifying titanium dioxide etc., stir 10-15 minute under 800-1000 rev/min, dry, be ground into 200-400 order powder and get final product.

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

First measure the tap density of the forward and backward calcium carbonate of modification, then join in polyvinyl chloride resin in the ratio of 15% respectively by calcium carbonate good for modification and unmodified water-ground limestone, make sample, the mechanical property respectively both test, comparing result sees the following form:

As can be seen from the above table, the loose bulk density of modified calcium carbonate diminishes, and illustrates that calcium carbonate split fully disperses, and it can also be seen that every mechanical property of modified calcium carbonate is all improved.

Claims (2)

1. a surface treated modified calcium carbonate, it is characterized in that, be made up of the raw material of following weight part: calcium carbonate 85-90, Tristearoylglycerol 1-2, poly aspartic acid 1.5-2.5, Gum Rosin 3-5, nylon66 fiber 4-6, palmitinic acid 1-1.5, pulverizing monkey grass 2-3, mullite 2-3, hydroxypropylcellulose 1-2, titanate coupling agent TC-WT 0.8-1, modifying titanium dioxide 2.5-3.5;

Described modifying titanium dioxide is made up of the raw material of following weight part: nano titanium oxide 50-60, mica powder 2-4, pulverizing zeolite molecular sieve 4-6, ferrocene 5-7, mineral fibre 3-4, trisodium phosphate 2-3, pure-acrylic emulsion 3-4, epoxyoleic acid butyl ester 3-5, phosphoric acid ester 2-4, water 50-60; Preparation method be first add pure-acrylic emulsion, nano titanium oxide, mica powder, pulverizing zeolite molecular sieve, mineral fibre, water stirs, form suspension, then ferrocene, epoxyoleic acid butyl ester is added immediately, be heated to 120-140 DEG C, mix and blend 25-35 minute, is cooled to room temperature, then all the other remaining components are added, stir under 1200-1500 rev/min of condition, dry at 60-70 DEG C, be ground into ultrafine powder and get final product.

2. a kind of surface treated modified calcium carbonate according to claim 1, is characterized in that, be made up of following concrete steps:

(1) calcium carbonate, pulverizing monkey grass, mullite, hydroxypropylcellulose, titanate coupling agent TC-WT are mixed and add in shredder, with the speed of 1500-2000 rev/min grinding 15-20 minute, take out and dry, pulverize porphyrize, cross 100-200 mesh sieve, obtain mixed powder stand-by;

(2) Gum Rosin, nylon66 fiber, palmitinic acid are put into mixing tank, be warming up between 80-90 DEG C, mix and blend half an hour, continue to add Tristearoylglycerol, poly aspartic acid, continue to be warming up to 130-160 DEG C, mix and pour out after 15-20 minute, obtain material modified;

(3) mixed powder is mixed with material modified, add suitable quantity of water, stir and grind 2-3 hour, form suspension stand-by;

(4) suspension is mixed with modifying titanium dioxide, stir 10-15 minute under 800-1000 rev/min, dry, be ground into 200-400 order powder and get final product.