A kind of PVC/ABS blend and tubing thereof
Technical field
The present invention relates to technical field of polymer materials, be specifically related to a kind of PVC/ABS blend and tubing thereof.
Background technology
Polyvinyl chloride (PVC) has advantages such as good electrical insulativity, good flame-retardance, difficult combustion, wear-resisting and resistance to chemical attack, and low price, can adjust it at different purposes and fill a prescription and reach customer requirements, so use range is extensive, is one of present the most widely used general purpose material.Yet PVC also exists shock strength low, poor processability, problem such as thermotolerance is not enough.
ABS is vinyl cyanide, divinyl and cinnamic terpolymer, and A represents vinyl cyanide, and B represents divinyl, and S represents vinylbenzene.ABS resin has good processing characteristics, and the shock strength height, but has shortcoming such as inflammable, loss of properties on aging, and most importantly the ABS price is relatively costly, so the use of ABS does not have PVC extensive.
The PVC/ABS blend is a kind of important modified plastics, because ABS has shock resistance height, good heat resistance, dimensional stabilizing and is easy to the good characteristics that PVC was short of such as machine-shaping, the blending and modifying that ABS is used for PVC, can not only improve the processing characteristics of PVC, and can also significantly improve the mechanical property of PVC, make the shock strength of PVC/ABS blend surpass pure ABS and PVC.
Though the PVC/ABS blend is because of having high impulse strength, thermostability, flame retardant resistance, processing characteristics and comparatively ideal cost performance preferably, be widely used in injecting, extrude, in the plastics molding process such as calendering, but itself there is defectives such as " flexural strength are not too high, heat-drawn wire is low, outward appearance is not ideal enough, processing fluidity poor " in existing P VC/ABS blend, therefore also limited its development and application, had not yet to see relevant report as the technology that adopts the PVC/ABS blend to produce tubing.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, provide that a kind of anti-impact is good, fire-retardant, ageing resistance is good, mechanical property is excellent, can be used for producing the PVC/ABS blend of tubing.
Another object of the present invention is to provide by above-mentioned PVC/ABS blend and prepares gained tubing.
Above-mentioned purpose of the present invention is achieved by following scheme:
A kind of PVC/ABS blend, said composition is got by each component blend of following parts by weight:
100 parts of polyvinyl chloride resins;
20~80 parts of ABS pellets;
1~3 part of stablizer;
1~2 part of lubricant;
0~5 part of impact modifier;
0~10 part of compatilizer;
0~1 part in oxidation inhibitor;
0~1 part of UV light absorber;
0~3 part of fire retardant;
1~3 part of processing aid.
In the above-mentioned PVC/ABS blend, stablizer is selected non-toxic stabilizer for use, as organotin stabilizer or calcium zinc class stablizer; Described organotin stabilizer has efficiently, high transparent, excellent heat resistance, and the characteristics of anti-sulfide staining, and the present invention can select the organotin stabilizer used always, as the laurate class, and maleic acid ester class or thio-alcohol; Described calcium zinc class stablizer has good thermostability, light stability, the transparency and tinting strength, and the present invention can select any calcium zinc class stablizer commonly used.
In the above-mentioned PVC/ABS blend, the effect of lubricant be to reduce in the PVC course of processing between the molecule and and processing units between friction, thereby improve resin flow, improve the transparency and the smooth finish of goods; Lubricant of the present invention is selected a kind of in polyethylene wax, oxidized polyethlene wax or the paraffin or more than one mixture.
In the above-mentioned PVC/ABS blend, impact modifier is selected any core-shell polymer, as ACR class (esters of acrylic acid), MBS class (methyl methacrylate, divinyl and cinnamic terpolymer) or CPE (chlorinatedpolyethylene).
In the above-mentioned PVC/ABS blend, the effect of compatilizer is by intermolecular linkage force, obtains stable blend, and compatilizer of the present invention is chlorinatedpolyethylene (CPE) or SAN etc., and described SAN is vinylbenzene (S)-vinyl cyanide (A) multipolymer, is called for short SAN.
In the above-mentioned PVC/ABS blend, oxidation inhibitor is antioxidant 1076, antioxidant 1010, anti-oxidant DLTP, oxidation inhibitor DSTP, oxidation inhibitor ODP or dihydroxyphenyl propane.
In the above-mentioned PVC/ABS blend, UV light absorber is UV531, UV328 or UV571 etc.
In the above-mentioned PVC/ABS blend, fire retardant is antimonous oxide (Sb
2O
3) or clorafin.
In the above-mentioned PVC/ABS blend, processing aid can be selected acrylic ester compound, as processing aid PA20, processing aid PA41 commonly used or processing aid K400P etc.
According to the prescription of above-mentioned PVC/ABS blend, adopt high-speed mixer (heat is mixed machine) to mix each component in the blend, enter cooling in the low speed mixer (cold mixer) then, last granulation extrusion moulding obtains PVC/ABS tubing of the present invention.
In the above-mentioned PVC/ABS preparation of pipes process, conventional parameter when the mixed low speed refrigerative condition of heat can select those skilled in the art to carry out this operation at a high speed, all can realize the present invention, carry out the mixed processing of high speed heat as each component in the polyvinyl chloride transparent compound being mixed machine by heat earlier, heat is mixed to 120~130 ℃, enters then in the cold mixer material that mixes is cooled off, cold mixing to 40~45 ℃ of dischargings, in forcing machine, carry out granulation, the extrusion moulding again of gained pellet.
In the above-mentioned PVC/ABS preparation of pipes process, preferred heat was mixed to 130 ℃ during heat was mixed at a high speed, preferred cold mixing to 45 ℃ of dischargings in the low speed cooling.
Compared with prior art, the present invention has following beneficial effect:
The inventor is by being optimized selection to component required in the PVC/ABS blend and consumption, prepares that anti-impact is good, fire-retardant, ageing resistance is good, mechanical property is excellent, clean hygiene, easy for installation and PVC/ABS tubing that cost performance is high.
Description of drawings
Fig. 1 is a PVC/ABS preparation of pipes process flow sheet.
Embodiment
The present invention will be further described below in conjunction with specific embodiment, but specific embodiment is not done any qualification to the present invention.
Industrial preparation PVC/ABS tubing of the present invention, its preparation technology is as shown in Figure 1: earlier polyvinyl chloride resin powder, ABS pellet and various auxiliary agent are added heat and mix in the machine, high temperature is mediated, by cold mixer the material that mixes is carried out cold mixed cooling then, discharge material and feed extruding pelletization in the forcing machine, the extrusion moulding of gained pellet, after the sign cutting, obtain PVC/ABS tubing finished product, finished product is carried out quality inspection, and qualified product are the packing warehouse-in just, and underproof finished product is scrapped fragmentation.
Embodiment 1
The blend of the PVC/ABS of present embodiment, its each component and parts by weight thereof are as follows:
100 parts of polyvinyl chloride resins;
60 parts of ABS pellets;
3 parts of impact modifier MBSs;
1 part of organotin T-178A;
0.4 part of lubricant stearic acid calcium;
10 parts of compatilizer chlorinatedpolyethylenees;
0.5 part of antioxidant 1010;
0.3 part of UV light absorber UV531;
2 parts of fire retardant clorafins;
0.5 part of processing aid PA-40.
Each component in the above-mentioned polyvinyl chloride transparent compound is mixed machine by heat earlier carry out the mixed processing of high speed heat, heat is mixed to 130 ℃, enter then in the cold mixer material that mixes is cooled off, cold mixing to 45 ℃ of dischargings, in forcing machine, carry out granulation, the extrusion moulding again of gained pellet is carried out various salient features tests to the tubing that obtains, and test result is as shown in table 1.
Embodiment 2
The blend of the PVC/ABS of present embodiment, its each component and parts by weight thereof are as follows:
100 parts of PVC resins;
80 parts of ABS pellets;
3 parts of impact modifier ACR;
0.8 part of organotin T-178A;
0.3 part of lubricant stearic acid calcium;
10 parts of compatilizer SAN (styrene-acrylonitrile copolymer);
0.5 part of antioxidant 1010;
0.3 part of UV light absorber UV531;
2 parts of fire retardant clorafins;
0.5 part of processing aid K400P.
Each component in the above-mentioned polyvinyl chloride transparent compound is mixed machine by heat earlier carry out the mixed processing of high speed heat, heat is mixed to 130 ℃, enter then in the cold mixer material that mixes is cooled off, cold mixing to 45 ℃ of dischargings, in forcing machine, carry out granulation, the extrusion moulding again of gained pellet is carried out various salient features tests to the tubing that obtains, and test result is as shown in table 1.
Embodiment 3
100 parts of PVC resins;
40 parts of ABS pellets;
3 parts of impact modifier ACR;
1 part of organotin T-178A;
0.5 part of lubricant stearic acid calcium;
8 parts of compatilizer SAN (styrene-acrylonitrile copolymer);
0.5 part of antioxidant 1010;
0.3 part of UV light absorber UV531;
2 parts of fire retardant clorafins;
0.5 part of other processing aids K400P.
Each component in the above-mentioned polyvinyl chloride transparent compound is mixed machine by heat earlier carry out the mixed processing of high speed heat, heat is mixed to 130 ℃, enter then in the cold mixer material that mixes is cooled off, cold mixing to 45 ℃ of dischargings, in forcing machine, carry out granulation, the extrusion moulding again of gained pellet is carried out various salient features tests to the tubing that obtains, and test result is as shown in table 1.
Embodiment 4
100 parts of PVC resins;
50 parts of ABS pellets;
3 parts of impact modifier MBSs;
1 part of organotin T-178A;
0.3 part of lubricant stearic acid calcium;
10 parts of Compatibilizer C PE chlorinatedpolyethylenees;
0.5 part of antioxidant 1010;
0.3 part of UV light absorber UV571;
Fire retardant antimonous oxide (Sb
2O
3) 2 parts;
0.5 part of other processing aids K400P.
The performance of table 1PVC/ABS tubing
Test |
Embodiment 1 |
Embodiment 2 |
Embodiment 3 |
Embodiment 4 |
Vicat softening point |
??84.4 |
??85.1 |
??84.0 |
??84.2 |
Tensile strength |
??34.7 |
??32.6 |
??36.2 |
??35.1 |
Elongation at break |
??77 |
??69.7 |
??102 |
??85 |
Shock strength |
??23.96 |
??24.2 |
??12.6 |
??21.5 |
As seen from Table 1, when the ratio of ABS strengthens, shock strength can improve, but the tensile strength of relative tubing and elongation at break can reduce, and with the ratio control of PVC and ABS under the condition of being fit to, umber as phase solvent also is controlled under the condition of being fit to, and can find out that the over-all properties of this tubing will be improved.
Gained PVC/ABS tubing anti-impact of the present invention is good, fire-retardant, resistance to ag(e)ing is good, mechanical property is excellent, health and easy for installation, has overcome pvc pipe and has impacted low and the not good enough shortcoming of ABS pipe fire resistance.