CN104130593A - Hydrophobic lipophilic surface-modified calcium carbonate and preparation method thereof - Google Patents

Abstract

Disclosed hydrophobic lipophilic surface-modified calcium carbonate is characterized by being prepared from the following raw materials in parts by weight: 90-95 parts of calcium carbonate, 2-3 parts of glass fiber, 5-7 parts of polylactic acid, 2-3 parts of polydimethylsiloxane, 3-5 parts of epoxidized triglyceride, 3-5 parts of silica sol, 1-1.5 parts of wood tar, 2-3 parts of titanium tetrachloride, 2-3 parts of expanded perlite, and 2.5-3.5 parts of modified titanium dioxide. By adding polydimethylsiloxane, expanded perlite, wood tar and other hydrophobic waterproof compositions and oily high-molecular polymers, the surface of calcium carbonate is changed into hydrophobicity from hydrophilicity, the effect of calcium carbonate with a polymer interface is enhanced, and a modified unsaturated bond gives play to crosslinking effect during processing with a polymer. The hydrophobic lipophilic surface-modified calcium carbonate can be used to fill plastic, rubber, adhesives and the like.

Description

Calcium carbonate of a kind of hydrophobic oil-wetted surface modification and preparation method thereof

Technical field

The present invention relates to industrial filler field, particularly calcium carbonate of a kind of hydrophobic oil-wetted surface modification and preparation method thereof.

Background technology

Calcium carbonate is a kind of conventional mineral filler, and, low price wide because originating etc., are 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, in the time 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 be to water-ground limestone modifying surface, make its surperficial oleophilic drainage, the consistency of enhancing and organic matrix, improves the dispersiveness in organic matrix, improves the performance of matrix material.

Summary of the invention

The object of this invention is to provide calcium carbonate of a kind of hydrophobic oil-wetted surface modification and preparation method thereof.

In order to realize object of the present invention, the present invention passes through following scheme implementation:

A calcium carbonate for hydrophobic oil-wetted surface modification, is made up of the raw material of following weight part: calcium carbonate 90-95, glass fibre 2-3, poly(lactic acid) 5-7, polydimethylsiloxane 2-3, epoxidation tri-glyceride 3-5, silicon sol 3-5, wood tar oil 1-1.5, titanium tetrachloride 2-3, pearlstone 2-3, 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; First preparation method adds pure-acrylic emulsion, nano titanium oxide, mica powder, pulverizing zeolite molecular sieve, mineral fibre, water to stir, form suspension, then add immediately ferrocene, epoxyoleic acid butyl ester, be heated to 120-140 DEG C, mix and blend 25-35 minute, is cooled to room temperature, then add all the other remaining components, under 1200-1500 rev/min of condition, stir, at 60-70 DEG C, dry, be ground into ultrafine powder and get final product.

The calcium carbonate of a kind of hydrophobic oil-wetted surface modification of the present invention, made by following concrete steps:

(1) calcium carbonate, glass fibre, titanium tetrachloride, pearlstone are mixed and added in shredder, grind 15-20 minute with the speed of 1500-2000 rev/min, take out and dry, pulverize porphyrize, cross 100-200 mesh sieve, obtain mixed powder stand-by;

(2) poly(lactic acid), polydimethylsiloxane, wood tar oil powder are put into mixing tank, be warming up between 80-90 DEG C, mix and blend half an hour, continue to add epoxidation tri-glyceride, silicon sol, 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 is by adding the hydrophobic waterproof ingredients such as polydimethylsiloxane, pearlstone, wood tar oil, and the high molecular polymer of oiliness, make calcium carbonate surface become hydrophobicity from wetting ability, strengthened and polymer interface between effect, the unsaturated link(age) of properties-correcting agent with polymer processing in can play crosslinked effect, the present invention can filled plastics, rubber, tackiness agent etc.

Specific embodiments

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

A calcium carbonate for hydrophobic oil-wetted surface modification, by following weight part (kilogram) raw material make: calcium carbonate 90, glass fibre 2, poly(lactic acid) 5, polydimethylsiloxane 2, epoxidation tri-glyceride 3, silicon sol 3, wood tar oil 1, titanium tetrachloride 2, pearlstone 2, modifying titanium dioxide 2.5;

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

The calcium carbonate of a kind of hydrophobic oil-wetted surface modification of the present invention, made by following concrete steps:

(1) calcium carbonate, glass fibre, titanium tetrachloride, pearlstone are mixed and added in shredder, grind 15-20 minute with the speed of 1500-2000 rev/min, take out and dry, pulverize porphyrize, cross 100-200 mesh sieve, obtain mixed powder stand-by;

(2) poly(lactic acid), polydimethylsiloxane, wood tar oil powder are put into mixing tank, be warming up between 80-90 DEG C, mix and blend half an hour, continue to add epoxidation tri-glyceride, silicon sol, 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.

Performance Detection to 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 calcium carbonate good modification and unmodified water-ground limestone are joined in polyvinyl chloride resin in 15% ratio respectively, make sample, test respectively both mechanical properties, comparing result sees the following form:

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

Claims (2)

1. the calcium carbonate of a hydrophobic oil-wetted surface modification, it is characterized in that, made by the raw material of following weight part: calcium carbonate 90-95, glass fibre 2-3, poly(lactic acid) 5-7, polydimethylsiloxane 2-3, epoxidation tri-glyceride 3-5, silicon sol 3-5, wood tar oil 1-1.5, titanium tetrachloride 2-3, pearlstone 2-3, 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; First preparation method adds pure-acrylic emulsion, nano titanium oxide, mica powder, pulverizing zeolite molecular sieve, mineral fibre, water to stir, form suspension, then add immediately ferrocene, epoxyoleic acid butyl ester, be heated to 120-140 DEG C, mix and blend 25-35 minute, is cooled to room temperature, then add all the other remaining components, under 1200-1500 rev/min of condition, stir, at 60-70 DEG C, dry, be ground into ultrafine powder and get final product.

2. a kind of calcium carbonate of hydrophobic oil-wetted surface modification according to claim 1, is characterized in that, is made up of following concrete steps:

(1) calcium carbonate, glass fibre, titanium tetrachloride, pearlstone are mixed and added in shredder, grind 15-20 minute with the speed of 1500-2000 rev/min, take out and dry, pulverize porphyrize, cross 100-200 mesh sieve, obtain mixed powder stand-by;

(2) poly(lactic acid), polydimethylsiloxane, wood tar oil powder are put into mixing tank, be warming up between 80-90 DEG C, mix and blend half an hour, continue to add epoxidation tri-glyceride, silicon sol, 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.