CN104194401A - Calcium carbonate modified filler and preparation method thereof - Google Patents

Abstract

The invention discloses a calcium carbonate modified filler which is prepared from the following raw materials in parts by weight: 3-4 parts of glyceryl monostearate, 3-4 parts of superfine zinc stearate, 0.2-0.3 part of polyglycerol fatty acid ester, 0.3-0.4 part of toluene diisocynate, 0.2-0.3 part of cobalt nitrate, 2-4 parts of emulsified paraffin, 0.5-0.8 part of oxidized starch, 0.1-0.2 part of potassium peroxodisulfate, 1-2 parts of silane coupling agent KH-550, 1-2 parts of tannic acid, 0.1-0.2 part of sodium tungstate, 80-85 parts of light calcium carbonate, 13-16 parts of auxiliaries and 120-140 parts of water. The filler disclosed by the invention comprises the oxidized starch, so that the film forming property is good, the transparency is good and the calcium carbonate is uniform in surface modification, round and good in reinforcing property; and through adding the polyglycerol fatty acid ester, the toluene diisocynate, the emulsified paraffin and the silane coupling agent KH-550, the organic characteristic of the calcium carbonate is increased, the force of binding the PVC is strong and the toughness and the strength are improved.

Description

A kind of calcium carbonate modified filler and preparation method thereof

Technical field

The invention belongs to field of plastics processing, particularly a kind of calcium carbonate modified filler and preparation method thereof.

Background technology

Calcium carbonate is a kind of mineral filler being widely used, may be used in plastics, rubber item, coating, sizing agent etc., particularly light calcium carbonate, stability to PVC plastics size has great role, the hardness of goods can be improved, surface luster and the profile pattern of goods can also be improved.In general PVC plastics, adding calcium carbonate thermotolerance can improve, and because calcium carbonate whiteness is more than 90%, can also replaces expensive white pigment and play certain whitening effect.But the wetting ability of calcium carbonate is strong, if do not carry out surface modification, poor with the consistency of polymeric matrix in the course of processing of polymer product, be very easy to reunite, even form textural defect because reunite, so calcium carbonate particles, must be to its modifying surface before being applied in polymer materials, complete by wetting ability to oil loving suitable transformation.

At present, the surface modification of calcium carbonate is mainly contained to two approach both at home and abroad, 1. make fine particles or ultra micro refinement; 2. improve the surface property of calcium carbonate, it is changed to Organic by inorganic nature, improve the consistency with organic polymer.But the calcium carbonate of miniaturization easily reunites, and cannot change the performance of its surface hydrophilic oleophobic.The surface modification of calcium carbonate comprises local reaction modification and surface coating modification, the modes such as high energy surface modification and mechanochemical modification, but PVC plastics industry is rapid at present, people constantly increase the demand of matrix material, calcium carbonate surface modifying has become one of deep process technology, thereby further improve a series of performances such as the oil absorbency, dispersiveness, dimensional stability, thermotolerance, wear resistance, water tolerance, flame retardant resistance, mildew resistance of calcium carbonate, to meet the PVC plastics industry of continuous progress.

Summary of the invention

The object of the present invention is to provide a kind of calcium carbonate modified filler and preparation method thereof, the calcium carbonate of this filler is surface-modified even, and rounded, reinforcing property is good, has increased the Organic on calcium carbonate surface, strong with PVC bonding force, improves toughness and intensity.

Technical scheme of the present invention is as follows:

A kind of calcium carbonate modified filler, is characterized in that being made up of the raw material of following weight part: glyceryl monostearate 3-4, ultra-fine Zinic stearas 3-4, polyglycerol fatty acid ester 0.2-0.3, tolylene diisocyanate 0.3-0.4, Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES 0.2-0.3, emulsified olefin 2-4, Sumstar 190 0.5-0.8, Potassium Persulphate 0.1-0.2, silane resin acceptor kh-550 1-2, tannic acid 1-2, sodium wolframate 0.1-0.2, light calcium carbonate 80-85, auxiliary agent 13-16, water 120-140;

Described auxiliary agent is made up of the raw material of following weight part: jojoba oil 0.03-0.05, tripoly phosphate sodium STPP 0.02-0.03, glycidyl allyl ether 0.2-0.3, γ-aminopropyl triethoxysilane 0.1-0.2, poly aspartic acid 0.1-0.2, hydrolytic polymaleic anhydride 0.1-0.2, ethylene glycol 0.1-0.2, potassium oleate 0.03-0.04, ABS 0.1-0.2, Microcrystalline Wax 0.1-0.2, active zinc flower 3-5, the calcium carbonate crystal whisker 1-2 of needle-like, micropore calcium carbonate 1-2, aklylene glycol 0.3-0.4, water 7-8, preparation method is: jojoba oil, glycidyl allyl ether, γ-aminopropyl triethoxysilane, poly aspartic acid, hydrolytic polymaleic anhydride, ethylene glycol, ABS, Microcrystalline Wax, aklylene glycol are mixed, stir, make recombiner, tripoly phosphate sodium STPP, potassium oleate are added to the water, be heated to 60-70 DEG C, stir, add calcium carbonate crystal whisker, the micropore calcium carbonate of active zinc flower, needle-like, stir 20-30 minute, ovendry power is broken into Zinc oxide powder, then adds recombiner, dispersion grinding 20-30 minute, under room temperature, leave standstill, slowly infiltrate into described Zinc oxide powder surface to recombiner, redispersion grinds to form the particle of 2-50 μ m, to obtain final product.

The preparation method of described calcium carbonate modified filler, is characterized in that comprising the following steps:

(1) Sumstar 190 is added to the water, after stirring, adds light calcium carbonate, under 3000-4000 rev/min, stir 6-8 minute, obtain mixture;

(2) silane resin acceptor kh-550, polyglycerol fatty acid ester, tolylene diisocyanate, Potassium Persulphate are joined in the material that (1) step obtains, be heated to 80-90 DEG C, under 9000-12000 rev/min, stir 30-40 minute, obtain mixture;

(3) other remaining component mixed grindings are disperseed to 15-20 minute, add in the mixture that (2) step obtains, be heated to 80-90 DEG C, under 1000-1500 rev/min, stir 30-40 minute, spraying is dry, is ground into the particle of 2-50 μ m, to obtain final product.

Beneficial effect of the present invention

Filler of the present invention passes through to add Sumstar 190, good film-forming property, and the transparency is good, makes calcium carbonate surface-modified evenly, and rounded, reinforcing property is good; By adding polyglycerol fatty acid ester, tolylene diisocyanate, emulsified olefin, silane resin acceptor kh-550, increase the Organic on calcium carbonate surface, strong with PVC bonding force, improve toughness and intensity; Auxiliary agent of the present invention can increase the wetting property of calcium carbonate in PVC, has reduced the defect of PVC.

Embodiment

A kind of calcium carbonate modified filler, by following weight part (kilogram) raw material make: glyceryl monostearate 3.5, ultra-fine Zinic stearas 3.5, polyglycerol fatty acid ester 0.1, tolylene diisocyanate 0.3, Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES 0.2, emulsified olefin 3, Sumstar 190 0.6, Potassium Persulphate 0.1, silane resin acceptor kh-550 1.5, tannic acid 1.5, sodium wolframate 0.1, light calcium carbonate 83, auxiliary agent 15, water 130;

Described auxiliary agent by following weight part (kilogram) raw material make: the calcium carbonate crystal whisker 1.5 of jojoba oil 0.04, tripoly phosphate sodium STPP 0.03, glycidyl allyl ether 0.3, γ-aminopropyl triethoxysilane 0.2, poly aspartic acid 0.2, hydrolytic polymaleic anhydride 0.1, ethylene glycol 0.1, potassium oleate 0.03, ABS 0.1, Microcrystalline Wax 0.1, active zinc flower 4, needle-like, micropore calcium carbonate 1.5, aklylene glycol 0.3, water 7.5; Preparation method is: jojoba oil, glycidyl allyl ether, γ-aminopropyl triethoxysilane, poly aspartic acid, hydrolytic polymaleic anhydride, ethylene glycol, ABS, Microcrystalline Wax, aklylene glycol are mixed, stir, make recombiner; Tripoly phosphate sodium STPP, potassium oleate are added to the water, be heated to 65 DEG C, stir, add calcium carbonate crystal whisker, the micropore calcium carbonate of active zinc flower, needle-like, stir 25 minutes, ovendry power is broken into Zinc oxide powder, then adds recombiner, dispersion grinding 25 minutes, under room temperature, leave standstill, slowly infiltrate into described Zinc oxide powder surface to recombiner, redispersion grinds to form the particle of 2-50 μ m, to obtain final product.

The preparation method of described calcium carbonate modified filler, comprises the following steps:

(1) Sumstar 190 is added to the water, after stirring, adds light calcium carbonate, under 3500 revs/min, stir 7 minutes, obtain mixture;

(2) silane resin acceptor kh-550, polyglycerol fatty acid ester, tolylene diisocyanate, Potassium Persulphate are joined in the material that (1) step obtains, be heated to 85 DEG C, under 10000 revs/min, stir 35 minutes, obtain mixture;

(3) other remaining component mixed grindings are disperseed 17 minutes, add in the mixture that (2) step obtains, be heated to 85 DEG C, stir 35 minutes under 1300 revs/min, spraying is dry, is ground into the particle of 2-50 μ m, to obtain final product.

Experimental data:

The oil-absorption(number) of the present embodiment filler is 43mL/100g, with the contact angle of water be 93 °.This filler is used for producing hard PVC test piece, and addition is 20%, and the performance test results is: yield strength 54.34Mpa, breaking tenacity is 44.334Mpa, elongation at break 103%, Young's modulus 2543.54Mpa.

This filler is used for producing flexible PVC test piece, and addition is 20%, and the performance test results is: yield strength 5.55Mpa, breaking tenacity is 6.68Mpa, elongation at break 112%, Young's modulus 65.55Mpa.

Claims (2)

1. a calcium carbonate modified filler, is characterized in that being made up of the raw material of following weight part: glyceryl monostearate 3-4, ultra-fine Zinic stearas 3-4, polyglycerol fatty acid ester 0.2-0.3, tolylene diisocyanate 0.3-0.4, Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES 0.2-0.3, emulsified olefin 2-4, Sumstar 190 0.5-0.8, Potassium Persulphate 0.1-0.2, silane resin acceptor kh-550 1-2, tannic acid 1-2, sodium wolframate 0.1-0.2, light calcium carbonate 80-85, auxiliary agent 13-16, water 120-140;

Described auxiliary agent is made up of the raw material of following weight part: jojoba oil 0.03-0.05, tripoly phosphate sodium STPP 0.02-0.03, glycidyl allyl ether 0.2-0.3, γ-aminopropyl triethoxysilane 0.1-0.2, poly aspartic acid 0.1-0.2, hydrolytic polymaleic anhydride 0.1-0.2, ethylene glycol 0.1-0.2, potassium oleate 0.03-0.04, ABS 0.1-0.2, Microcrystalline Wax 0.1-0.2, active zinc flower 3-5, the calcium carbonate crystal whisker 1-2 of needle-like, micropore calcium carbonate 1-2, aklylene glycol 0.3-0.4, water 7-8, preparation method is: jojoba oil, glycidyl allyl ether, γ-aminopropyl triethoxysilane, poly aspartic acid, hydrolytic polymaleic anhydride, ethylene glycol, ABS, Microcrystalline Wax, aklylene glycol are mixed, stir, make recombiner, tripoly phosphate sodium STPP, potassium oleate are added to the water, be heated to 60-70 DEG C, stir, add calcium carbonate crystal whisker, the micropore calcium carbonate of active zinc flower, needle-like, stir 20-30 minute, ovendry power is broken into Zinc oxide powder, then adds recombiner, dispersion grinding 20-30 minute, under room temperature, leave standstill, slowly infiltrate into described Zinc oxide powder surface to recombiner, redispersion grinds to form the particle of 2-50 μ m, to obtain final product.

2. the preparation method of calcium carbonate modified filler according to claim 1, is characterized in that comprising the following steps:

(1) Sumstar 190 is added to the water, after stirring, adds light calcium carbonate, under 3000-4000 rev/min, stir 6-8 minute, obtain mixture;

(2) silane resin acceptor kh-550, polyglycerol fatty acid ester, tolylene diisocyanate, Potassium Persulphate are joined in the material that (1) step obtains, be heated to 80-90 DEG C, under 9000-12000 rev/min, stir 30-40 minute, obtain mixture;

(3) other remaining component mixed grindings are disperseed to 15-20 minute, add in the mixture that (2) step obtains, be heated to 80-90 DEG C, under 1000-1500 rev/min, stir 30-40 minute, spraying is dry, is ground into the particle of 2-50 μ m, to obtain final product.