CN103709553A - Secure and non-toxic PVC-U valve body - Google Patents
Secure and non-toxic PVC-U valve body Download PDFInfo
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- CN103709553A CN103709553A CN201310664179.6A CN201310664179A CN103709553A CN 103709553 A CN103709553 A CN 103709553A CN 201310664179 A CN201310664179 A CN 201310664179A CN 103709553 A CN103709553 A CN 103709553A
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Abstract
The invention relates to a secure and non-toxic PVC-U valve body. The secure and non-toxic PVC-U valve body is prepared by the following raw materials by weight: 100 parts of polyvinyl chloride resin powder, 2 parts of a methyl tin mercaptide stabilizer, 4 parts of titanium dioxide, 20 parts of calcium carbonate, 4-5 parts of a processing aid, 4-5 parts of an impact modifier, 3-5 parts of epoxidized soybean oil, 1.1-1.4 parts of an internal lubricant and 0.6-0.8 part of an external lubricant. The secure and non-toxic PVC-U valve body has good mechanical properties, good stability and low cost.
Description
Technical field
The present invention relates to ball valve production technical field, relate in particular to a kind of PVC-U valve body of safety non-toxic.
Background technology
Rapidly, by feat of the mechanical property (close to steel) of plastics excellence, cheap price and many advantages such as corrosion-resistant, in a lot of fields, Plastic valve is progressively replacing steel valve for plastic industry development.Ball valve made of plastic mainly contains following advantage: compact construction, and volume is little, lightweight, and valve body structure is symmetrical, can bear well the stress from pipeline; There is minimum flow resistance (actual is 0), can realize fast opening and closing, and during fast opening/closing valve, operation is without impacting; The trim of spheroid and valve seat and media isolated, be difficult for causing the erosion of valve sealing face.These advantages are on the increase its field that can be applied to, and these advantages of PVC-U ball valve make it in the closely bound up field of agricultural, life water delivery etc. and human lives, be widely used.
At present, ball valve made of plastic mainly contains several classes such as PVC-U, RPP, PVDF, CPVC; Wherein PVC-U ball valve because of its cost of material cheap, physicals is excellent, consumption is the widest, particularly in the pipe network system such as people's domestic water, agricultural irrigation water, applies more.PVC-U ball valve needs to add thermo-stabilizer in the process of process for processing, because of lead salt stabilizer, with respect to other stablizer, compare and have that price is lower, the good advantage of stabilising effect, make lead salt stabilizer become process for processing PVC-U ball valve manufacturer first-selected.But lead salt stabilizer is harmful to HUMAN HEALTH and environment, current international PVC has forbidden in market or has limited and use lead salt stabilizer.In water saving industry, develop rapidly, in the demand of ball valve and the higher situation of performance requriements, research and develop asepsis environment-protecting PVC-U ball valve of high quality and at a reasonable price, the development important in inhibiting to environment protection and many industries.
Summary of the invention
Technical problem to be solved by this invention is to provide the PVC-U valve body of a kind of good stability, cheap safety non-toxic.
For addressing the above problem, the PVC-U valve body of a kind of safety non-toxic of the present invention, it is characterized in that: it is made by the raw material of following weight parts: 100 parts of polyvinyl chloride resin powder, 2 parts of thiol methyl tin stablizers, 4 parts of titanium dioxides, 20 parts, calcium carbonate, 4 ~ 5 parts of processing aids, 4 ~ 5 parts of impact modifiers, 3 ~ 5 parts of epoxy soybean oils, 1.1 ~ 1.4 parts of internal lubricants, 0.6 ~ 0.8 part of external lubricant.
The model of described polyvinyl chloride resin powder is SG-5 type, its K value 68 ~ 66, the polymerization degree 1100 ~ 1000, fugitive constituent is less than or equal to 0.4%, apparent density is more than or equal to 0.4 kg/m
3.
Described thiol methyl tin stablizer refers to SC-688 thiol methyl tin 181 thermo-stabilizers, and its tin content is 18.7 ~ 19.7%, sulphur content is 11.5 ~ 12.5%, monomethyl content is 19.0 ~ 29.0%.
Described titanium dioxide refers to R500 type titanium dioxide.
Described calcium carbonate refers to that settling volume is to be more than or equal to the light calcium carbonate of 2.4 mls/g.
Described processing aid refers to ACR-801 type processing aid.
Described impact modifier refers to chlorinated polyvinyl chloride (CPE).
Described internal lubricant refers to Tegin 55G.
Described external lubricant refers to stearic acid.
The preparation method of the PVC-U valve body of a kind of safety non-toxic as above, comprises the following steps:
(1) by weigh various raw materials by proportioning;
(2) under the speed of 40 ~ 60rpm, in batch mixing pot, add polyvinyl chloride resin powder, thiol methyl tin stablizer; Then under the condition of 50 ~ 70 ℃, to add successively epoxy soybean oil, impact modifier, calcium carbonate, titanium dioxide, processing aid, internal lubricant, external lubricant under the speed of 30 ~ 45rpm in described batch mixing pot, obtain compound;
(3) under the condition of 75 ~ 95 ℃, with under the speed of 40 ~ 50rmp to 0.2 ~ 0.3 times of stopping composition light calcium carbonate that adds this mixture quality in described compound, heat is mixed after 115 ~ 125 ℃ and is put into cold mixed pot, when cold while mixing to 45 ~ 55 ℃ blowing take the dish out of the pot and send in tablets press, in 1 section of temperature of barrel, it is 150 ~ 170 ℃, 2 sections of temperature of barrel are 155 ~ 175 ℃, 3 sections of temperature of barrel are 160 ~ 180 ℃, 1 section of temperature of head is 145 ~ 165 ℃, 2 sections of temperature of head are 150 ~ 170 ℃, 3 sections of temperature of head are 155 ~ 175 ℃, merging core temperature is 155 ~ 175 ℃, die temperature is to carry out granulation under the condition of 160 ~ 180 ℃, after 45 ~ 75min, carry out according to a conventional method ball valve body injection moulding and form ball valve group.
The present invention compared with prior art has the following advantages:
1, because using thiol methyl tin stablizer, the present invention replaces lead salt stabilizer, therefore, and products obtained therefrom environmental protection, safety non-toxic.
2, the present invention uses epoxy soybean oil as softening agent, meanwhile, fills a prescription under the prerequisite of other composition and improves calcium carbonate consumption not changing PVC-U, has greatly reduced production cost, has improved economic benefit.
3, epoxy soybean oil and thiol methyl tin stablizer synergy in the present invention, significantly promote the stability of pvc resin, thereby increased the work-ing life of product.
(1) thiol methyl tin stablizer thermo-stabilizer mechanism:
The effect of a, absorbing hydrogen chloride: thiol methyl tin can form the salt of pretending with HCl, so have the function that absorbs HCl, its reaction is as follows:
B, thiol esters group replace active chlorine atom in PVC molecule, react as follows:
Variable color during PVC thermal destruction is relevant with the conjugated double bond generating in polymer chain.Thiol methyl tin absorbs the mercaptan producing after HCl and can add in the conjugated double bond system generating after PVC thermal destruction, reduce the length of molecular chain in conjugated double bond system, stop the formation of conjugated double bond, consequently destroyed the conjugated structure of PVC after thermal destruction, polyenoid is cut off into some short and small chain links to not meeting its variable color condition, thereby suppressed painted, made the color and luster of goods can be not dimmed.
C, hydroperoxide decomposition/(prevention autoxidation): thiol methyl tin can hydroperoxide decomposition, thereby prevents autoxidation, so it also has the function of aid anti-oxidants.
D, destruction carbonium ion: the important reason darkening after PVC degradation is to have produced carbonium ion, thiol methyl tin can destroy by absorbing HCl the structure of carbonium ion salt, make it change back to polyenoid serializing compound, thereby keep PVC nondiscoloration.
(2) in epoxy soybean oil molecular structure, contain epoxide group, in polyvinyl chloride resin processing, it can absorb the HCl producing when polyvinyl chloride resin decomposes, the continuous decomposition of retardance PVC, the chlorine radical that dissociates and in the time of catching again polyvinyl chloride resin degraded, stops the reaction of chlorine radical, can make the active chlorine atom on PVC chain stable, slow down degradation speed, play stabilization, thereby extend the work-ing life of PVC-U goods
4, take pipe fitting of the present invention (formula 1., 5.), domestic certain factory's calcium zinc stabilizer pipe fitting (formula is 2.), our factory PVC lead salt stabilizer pipe fitting (formula is 3.), domestic certain pvc pipe part factory lead salt stabilizer pipe fitting (formula is 4.) carries out performance test (referring to table 1) as example:
Table 1
(1) shock resistance test:
PVC-U material shock resistance is pressed GB/T 1043-1993 " rigid plastics charpy impact test method " test.This experiment test notched specimen simple beam impact strength, its indication notch sample under the effect of impact load, the ratio of the impact energy absorbing during destruction and the original cross-sectional area at sample break place, the kJ/ ㎡ of unit.Test result following (referring to table 2):
Table 2
As can be seen from Table 2, thiol methyl tin stabilizer formula 1. (10 parts of calcium) notched Izod impact strength is the highest, then be followed successively by 5. 4. 3. (our factory's lead salt) > formula 2. (other factory's calcium zinc) of (other factory's lead salt) > formula of (20 parts of calcium) > formula of thiol methyl tin stabilizer formula, although being introduced in of macrobead rigid particles (as calcium carbonate granule) plays stress raiser in material, reduce the toughness of resin matrix, but after rigid particles particle diameter is less than a certain numerical value, its volume reduces, specific surface area increases, therefore also increase with the contact area of resin matrix, material rigid particles when being subject to impacting can cause matrix and produces crazing and absorb energy, the toughness of raising system.Meanwhile, the introducing of rigid particles can not reduce rigidity and the comprehensive mechanical property of material.
(2) tensile property test:
PVC-U material extending performance is measured by GB/T 1040.2-2006 " the mensuration molding of plastic tensile performance and the test conditions of extrusion molding plastics " requirement, its experimental principle is to stretch along the longitudinal main shaft constant speed of sample, until fracture or stress (load) or strain (elongation) reach a certain preset value, measure sample bears in this course load and elongation thereof.Test result following (referring to table 3):
Table 3
By table 3, can be drawn, the thiol methyl tin stabilizer formula that the present invention selects 1. (10 parts of calcium) material extending performance is best, and all the other are 4. 3. (our factory's lead salt) > formula 2. (other factory's calcium zinc) of (other factory's lead salt) > formula of (20 parts of calcium) > formula of filling a prescription 5. successively.
In sum, the present invention has excellent mechanical property, be better than our factory and domestic certain factory's lead salt, domestic certain factory's calcium zinc stabilizer formula, and due to the effect of inorganic particulate crazing toughening mechanism, formula 5. (20 parts of calcium) still has good mechanical property when reducing formulation cost.
Embodiment
embodiment 1a kind of PVC-U valve body of safety non-toxic, it is made by the raw material of following weight parts (kg): 100 parts of polyvinyl chloride resin powder, 2 parts of thiol methyl tin stablizers, 4 parts of titanium dioxides, 20 parts, calcium carbonate, 4 parts of processing aids, 4 parts of impact modifiers, 3 parts of epoxy soybean oils, 1.1 parts of internal lubricants, 0.6 part of external lubricant.
The preparation method of this PVC-U valve body, comprises the following steps:
(1) by weigh various raw materials by proportioning;
(2) under the speed of 40 ~ 60rpm, in batch mixing pot, add polyvinyl chloride resin powder, thiol methyl tin stablizer; Then under the condition of 50 ~ 70 ℃, to add successively epoxy soybean oil, impact modifier, calcium carbonate, titanium dioxide, processing aid, internal lubricant, external lubricant under the speed of 30 ~ 45rpm in batch mixing pot, obtain compound;
(3) under the condition of 75 ~ 95 ℃, with under the speed of 40 ~ 50rmp to 0.2 ~ 0.3 times of stopping composition light calcium carbonate (800 ~ 1500 order) that adds this mixture quality in compound, heat is mixed after 115 ~ 125 ℃ and is put into cold mixed pot, when cold while mixing to 45 ~ 55 ℃ blowing take the dish out of the pot and send in tablets press, in 1 section of temperature of barrel, it is 150 ~ 170 ℃, 2 sections of temperature of barrel are 155 ~ 175 ℃, 3 sections of temperature of barrel are 160 ~ 180 ℃, 1 section of temperature of head is 145 ~ 165 ℃, 2 sections of temperature of head are 150 ~ 170 ℃, 3 sections of temperature of head are 155 ~ 175 ℃, merging core temperature is 155 ~ 175 ℃, die temperature is to carry out granulation under the condition of 160 ~ 180 ℃, after 45 ~ 75min, carry out according to a conventional method ball valve body injection moulding and form ball valve group.
embodiment 2a kind of PVC-U valve body of safety non-toxic, it is made by the raw material of following weight parts (kg): 100 parts of polyvinyl chloride resin powder, 2 parts of thiol methyl tin stablizers, 4 parts of titanium dioxides, 20 parts, calcium carbonate, 5 parts of processing aids, 5 parts of impact modifiers, 5 parts of epoxy soybean oils, 1.4 parts of internal lubricants, 0.8 part of external lubricant.
The preparation method of this PVC-U valve body is same
embodiment 1.
embodiment 3a kind of PVC-U valve body of safety non-toxic, it is made by the raw material of following weight parts (kg): 100 parts of polyvinyl chloride resin powder, 2 parts of thiol methyl tin stablizers, 4 parts of titanium dioxides, 20 parts, calcium carbonate, 4.5 parts of processing aids, 4.5 parts of impact modifiers, 4 parts of epoxy soybean oils, 1.2 parts of internal lubricants, 0.7 part of external lubricant.
The preparation method of this PVC-U valve body is same
embodiment 1.
Above-mentioned
embodiment 1 ~ 3in, the model of polyvinyl chloride resin powder is SG-5 type, its K value 68 ~ 66, the polymerization degree 1100 ~ 1000, fugitive constituent is less than or equal to 0.4%, apparent density is more than or equal to 0.4 kg/m
3; Thiol methyl tin stablizer refers to SC-688 thiol methyl tin 181 thermo-stabilizers, and its tin content is 18.7 ~ 19.7%, sulphur content is 11.5 ~ 12.5%, monomethyl content is 19.0 ~ 29.0%; Titanium dioxide refers to R500 type titanium dioxide; Calcium carbonate refers to that settling volume is to be more than or equal to the light calcium carbonate of 2.4 mls/g; Processing aid refers to ACR-801 type processing aid; Impact modifier refers to chlorinated polyvinyl chloride (CPE); Internal lubricant refers to Tegin 55G; External lubricant refers to stearic acid.
Claims (10)
1. the PVC-U valve body of a safety non-toxic, it is characterized in that: it is made by the raw material of following weight parts: 100 parts of polyvinyl chloride resin powder, 2 parts of thiol methyl tin stablizers, 4 parts of titanium dioxides, 20 parts, calcium carbonate, 4 ~ 5 parts of processing aids, 4 ~ 5 parts of impact modifiers, 3 ~ 5 parts of epoxy soybean oils, 1.1 ~ 1.4 parts of internal lubricants, 0.6 ~ 0.8 part of external lubricant.
2. the PVC-U valve body of a kind of safety non-toxic as claimed in claim 1, it is characterized in that: the model of described polyvinyl chloride resin powder is SG-5 type, its K value 68 ~ 66, the polymerization degree 1100 ~ 1000, fugitive constituent is less than or equal to 0.4%, apparent density is more than or equal to 0.4 kg/m
3.
3. the PVC-U valve body of a kind of safety non-toxic as claimed in claim 1, it is characterized in that: described thiol methyl tin stablizer refers to SC-688 thiol methyl tin 181 thermo-stabilizers, its tin content is 18.7 ~ 19.7%, sulphur content is 11.5 ~ 12.5%, monomethyl content is 19.0 ~ 29.0%.
4. the PVC-U valve body of a kind of safety non-toxic as claimed in claim 1, is characterized in that: described titanium dioxide refers to R500 type titanium dioxide.
5. the PVC-U valve body of a kind of safety non-toxic as claimed in claim 1, is characterized in that: described calcium carbonate refers to that settling volume is to be more than or equal to the light calcium carbonate of 2.4 mls/g.
6. the PVC-U valve body of a kind of safety non-toxic as claimed in claim 1, is characterized in that: described processing aid refers to ACR-801 type processing aid.
7. the PVC-U valve body of a kind of safety non-toxic as claimed in claim 1, is characterized in that: described impact modifier refers to chlorinated polyvinyl chloride.
8. the PVC-U valve body of a kind of safety non-toxic as claimed in claim 1, is characterized in that: described internal lubricant refers to Tegin 55G.
9. the PVC-U valve body of a kind of safety non-toxic as claimed in claim 1, is characterized in that: described external lubricant refers to stearic acid.
10. the preparation method of the PVC-U valve body of a kind of safety non-toxic as claimed in claim 1, comprises the following steps:
(1) by weigh various raw materials by proportioning;
(2) under the speed of 40 ~ 60rpm, in batch mixing pot, add polyvinyl chloride resin powder, thiol methyl tin stablizer; Then under the condition of 50 ~ 70 ℃, to add successively epoxy soybean oil, impact modifier, calcium carbonate, titanium dioxide, processing aid, internal lubricant, external lubricant under the speed of 30 ~ 45rpm in described batch mixing pot, obtain compound;
(3) under the condition of 75 ~ 95 ℃, with under the speed of 40 ~ 50rmp to 0.2 ~ 0.3 times of stopping composition light calcium carbonate that adds this mixture quality in described compound, heat is mixed after 115 ~ 125 ℃ and is put into cold mixed pot, when cold while mixing to 45 ~ 55 ℃ blowing take the dish out of the pot and send in tablets press, in 1 section of temperature of barrel, it is 150 ~ 170 ℃, 2 sections of temperature of barrel are 155 ~ 175 ℃, 3 sections of temperature of barrel are 160 ~ 180 ℃, 1 section of temperature of head is 145 ~ 165 ℃, 2 sections of temperature of head are 150 ~ 170 ℃, 3 sections of temperature of head are 155 ~ 175 ℃, merging core temperature is 155 ~ 175 ℃, die temperature is to carry out granulation under the condition of 160 ~ 180 ℃, after 45 ~ 75min, carry out according to a conventional method ball valve body injection moulding and form ball valve group.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310664179.6A CN103709553A (en) | 2013-12-11 | 2013-12-11 | Secure and non-toxic PVC-U valve body |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310664179.6A CN103709553A (en) | 2013-12-11 | 2013-12-11 | Secure and non-toxic PVC-U valve body |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108570195A (en) * | 2018-02-26 | 2018-09-25 | 杭州乐守科技有限公司 | A kind of antimildew and antibacterial PVC profile and preparation method thereof |
| CN112143139A (en) * | 2020-10-09 | 2020-12-29 | 新疆中泰化学阜康能源有限公司 | High-fluidity high-toughness PVC valve injection molding aggregate and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101486820A (en) * | 2009-02-16 | 2009-07-22 | 黄山琦源塑管阀门有限公司 | PVC material and preparation thereof |
-
2013
- 2013-12-11 CN CN201310664179.6A patent/CN103709553A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101486820A (en) * | 2009-02-16 | 2009-07-22 | 黄山琦源塑管阀门有限公司 | PVC material and preparation thereof |
Non-Patent Citations (1)
| Title |
|---|
| 张兆红、游长江: "《现代橡胶技术丛书 橡胶补强填充剂》", 30 June 2013, 化学工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108570195A (en) * | 2018-02-26 | 2018-09-25 | 杭州乐守科技有限公司 | A kind of antimildew and antibacterial PVC profile and preparation method thereof |
| CN112143139A (en) * | 2020-10-09 | 2020-12-29 | 新疆中泰化学阜康能源有限公司 | High-fluidity high-toughness PVC valve injection molding aggregate and preparation method thereof |
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Application publication date: 20140409 |