CN104194193A - Special filler for antistatic wear-resistant PVC (polyvinyl chloride) tube and preparation method thereof - Google Patents

Abstract

The invention discloses a special filler for an antistatic wear-resistant PVC tube. The special filler is prepared from the following raw materials in parts by weight: 0.8-1.2 parts of propylene glycol fatty acidate, 2-4 parts of a titanate coupling agent, 3-4 parts of ethylene-octylene copolymer, 0.1-0.2 part of cerous nitrate, 3-4 parts of phosphate tri(2, 4- di-tert-butyl phenyl) ester, 2-3 parts of organic bentonite, 0.2-0.3 part of polyvinyl alcohol, 3-4 parts of staple glass fiber, 3-5 parts of tetrapod-shaped zinc oxide whisker, 0.2-0.3 part of polyacrylic acid, 80-85 parts of light calcium carbonate, 13-16 parts of auxiliaries and 120-140 parts of water. By virtue of the special filler, calcium carbonate has a very high settling volume and relatively low oil absorption rate, and can be dispersed in matrix resin very well; and moreover, the special filler can be used for increasing the tearing strength, the heat resistance, the antistatic property and the wear resistance of PVC, and is a preferred filler for high-grade plastics.

Description

A kind of antistatic wear-resistant pvc pipe filler special and preparation method thereof

Technical field

The invention belongs to field of plastics processing, particularly a kind of antistatic wear-resistant pvc pipe filler special 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., light calcium carbonate particularly, 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 because reunite, form textural defect, so calcium carbonate particles in being applied to polymer materials before, must be to its modifying surface, 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.Yet the calcium carbonate of miniaturization is easily reunited, 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 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 antistatic wear-resistant pvc pipe filler special and preparation method thereof, this calcium carbonate has very high settling volume and lower oil absorbency, can in matrix resin, disperse preferably, can increase tear strength, thermotolerance, static resistance and the wear resistance of PVC, be the preferred filler of high-grade plastics.

Technical scheme of the present invention is as follows:

A kind of antistatic wear-resistant pvc pipe filler special, it is characterized in that being made by the raw material of following weight part: propylene glycol fatty acid ester 0.8-1.2, titanate coupling agent 2-4, ethylene-octene copolymer 3-4, cerous nitrate 0.1-0.2, tricresyl phosphite (2,4-di-tert-butyl) ester 3-4, organobentonite 2-3, polyvinyl alcohol 0.2-0.3, staple glass fibre 3-4, four acicular type zinc oxide crystal whisker 3-5, polyacrylic acid 0.2-0.3, light calcium carbonate 80-85, auxiliary agent 13-16, water 120-140;

Described auxiliary agent is made by 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 ℃, 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, standing under room temperature, to recombiner, slowly infiltrate into described Zinc oxide powder surperficial, redispersion grinds to form the particle of 2-50 μ m, obtains.

The preparation method of described antistatic wear-resistant pvc pipe filler special, is characterized in that comprising the following steps:

(1) organobentonite, polyvinyl alcohol, polyacrylic acid are added to the water, after stirring, add light calcium carbonate, staple glass fibre, four acicular type zinc oxide crystal whisker, under 3000-4000 rev/min, stir 6-8 minute, obtain mixture;

(2) titanate coupling agent, ethylene-octene copolymer are joined in the material that (1) step obtains, be heated to 80-90 ℃, 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 ℃, under 1000-1500 rev/min, stir 30-40 minute, spraying is dry, is ground into the particle of 2-50 μ m, obtains.

Beneficial effect of the present invention

Filler of the present invention is by being used propylene glycol fatty acid ester, titanate coupling agent, ethylene-octene copolymer, can be combined with the polar group on calcium carbonate surface preferably, improve modified effect, make calcium carbonate there is very high settling volume and lower oil absorbency, can in matrix resin, disperse preferably; By adding staple glass fibre, four acicular type zinc oxide crystal whisker, can increase tear strength, thermotolerance, static resistance and the wear resistance of PVC, be the preferred filler of high-grade plastics; 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 antistatic wear-resistant pvc pipe filler special, by following weight part (kilogram) raw material make: propylene glycol fatty acid ester 1, titanate coupling agent 3, ethylene-octene copolymer 3.5, cerous nitrate 0.1, tricresyl phosphite (2,4-di-tert-butyl) ester 3.5, organobentonite 2.5, polyvinyl alcohol 0.2, staple glass fibre 3.5, four acicular type zinc oxide crystal whisker 4, polyacrylic acid 0.3, light calcium carbonate 83, auxiliary agent 15, water 130;

The preparation method of described antistatic wear-resistant pvc pipe filler special, comprises the following steps:

(1) organobentonite, polyvinyl alcohol, polyacrylic acid are added to the water, after stirring, add light calcium carbonate, staple glass fibre, four acicular type zinc oxide crystal whisker, under 3500 revs/min, stir 7 minutes, obtain mixture;

(2) titanate coupling agent, ethylene-octene copolymer are joined in the material that (1) step obtains, be heated to 85 ℃, under 10000 revs/min, stir 35 minutes, obtain mixture;

(3) other remaining component mixed grindings are disperseed 18 minutes, add in the mixture that (2) step obtains, be heated to 85 ℃, stir 35 minutes under 1000-1500 rev/min, spraying is dry, is ground into the particle of 2-50 μ m, obtains.

Experimental data:

The oil-absorption(number) of the present embodiment filler is 37mL/100g, with the contact angle of water be 90 °.This filler is used for producing hard PVC test piece, and addition is 20%, and the performance test results is: yield strength 54.92Mpa, breaking tenacity is 45.854Mpa, elongation at break 103%, Young's modulus 2709.5Mpa。

This filler is used for producing flexible PVC test piece, and addition is 20%, and the performance test results is: yield strength 5.86Mpa, breaking tenacity is 7.08Mpa, elongation at break 115%, Young's modulus 63.78Mpa.

Claims (2)

1. an antistatic wear-resistant pvc pipe filler special, it is characterized in that being made by the raw material of following weight part: propylene glycol fatty acid ester 0.8-1.2, titanate coupling agent 2-4, ethylene-octene copolymer 3-4, cerous nitrate 0.1-0.2, tricresyl phosphite (2,4-di-tert-butyl) ester 3-4, organobentonite 2-3, polyvinyl alcohol 0.2-0.3, staple glass fibre 3-4, four acicular type zinc oxide crystal whisker 3-5, polyacrylic acid 0.2-0.3, light calcium carbonate 80-85, auxiliary agent 13-16, water 120-140;

Described auxiliary agent is made by 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 ℃, 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, standing under room temperature, to recombiner, slowly infiltrate into described Zinc oxide powder surperficial, redispersion grinds to form the particle of 2-50 μ m, obtains.

2. the preparation method of antistatic wear-resistant pvc pipe filler special according to claim 1, is characterized in that comprising the following steps:

(1) organobentonite, polyvinyl alcohol, polyacrylic acid are added to the water, after stirring, add light calcium carbonate, staple glass fibre, four acicular type zinc oxide crystal whisker, under 3000-4000 rev/min, stir 6-8 minute, obtain mixture;

(2) titanate coupling agent, ethylene-octene copolymer are joined in the material that (1) step obtains, be heated to 80-90 ℃, 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 ℃, under 1000-1500 rev/min, stir 30-40 minute, spraying is dry, is ground into the particle of 2-50 μ m, obtains.