CN106432971A - Preparation and application of novel environment-friendly foaming PVC specific uracil zinc composite stabilizer - Google Patents
Preparation and application of novel environment-friendly foaming PVC specific uracil zinc composite stabilizer Download PDFInfo
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Abstract
The invention relates to the technical field of a chemical stabilizer, and particularly discloses a preparation and an application of the novel environment-friendly foaming PVC specific uracil zinc composite stabilizer. The uracil zinc composite stabilizer is prepared by compounding uracil metal salt by uracil and zinc nitrate under the catalyst condition; according to the setting formula, compounding hydrotalcite, antioxygen, lubricant, zinc stearate and assistant thermal stabilizer and uracil zinc metal salt, and preparing uracil zinc composite thermal stabilizer. The uracil zinc composite stabilizer can replace lead cadmium salt type poisonous stabilizer, and has good compatibility and dispersibility with PVC (polyvinyl chloride); moreover, the composite stabilizer has relatively good thermal stability, light stability and coloring force. Compared with ordinary zinc stearate, the zinc content is improved, and the stabilizer has very good effect of inhibiting zinc burning; the ageing performance in later period and the sunproof weather resistance are significantly improved; the foaming PVC industry has wide application prospect.
Description
Technical field
The present invention relates to chemical stabilizer technical field, a kind of special uracil zinc of specific design novel environment friendly foaming PVC
The preparation and application of complex stabilizer.
Background technology
Foam plasticss, also known as aerated plastics, are with resin as matrix, the internal plastics full of countless small foam structures；Poly-
Vinyl chloride (PVC) foam plasticss are widely used for insulant and daily plastic system with its cheap price and excellent performance
Product, compared with other foam plasticss, PVC foam plasticss itself have preferable anti-flammability, be widely used in furniture, building,
The industries such as automobile, advertisement, decoration；In U.S., method, moral, Switzerland and Han Deng developed country, PVC foam is widely used in body of wall and divides
Barrier material, achieves considerable environmental effect and economic benefit；In recent years, the aggregate demand to PVC foam plasticss for the world
Stable growing trend still occurs；But because PVC strand has fault of construction, in the PVC course of processing, hard PVC plus
Work temperature is generally 180oC, the processing temperature of flexible PVC decreases, but is also higher than 100oC；During rise, PVC is heated
Degrade, color is gradually changed into yellow from white, under serious conditions, melanism occurs, lose original physics and chemistry
Property is so as to no longer have use value；Solving this problem has two methods：One is the synthetic method improving PVC, from basic
The upper formation suppressing its unstable defect sturcture, but the method technically remains some problems；Two is to add in formula
Stabilizer, the method is simple and easy to operate and economical and practical, is the main method solving this problem at present；Heat stabilizer be exactly
Under this background, research and development is got up, and during having become foaming PVC processing and manufacturing, indispensable feature helps
Agent.
PVC heat stabilizer is the compound that a class can suppress PVC resin thermal degradation, and it is in PVC molding formula
Requisite additive；Before not developing suitable heat stabilizer, PVC or a class do not have the material of real value
Material, the development of heat stabilizer technology could drive the raising of PVC processing characteristics and properties of product；The more commonly used in PVC industry
Heat stabilizer have the stabilizers such as lead salt, organic tin, metal soap, terres rares and calcium zinc class；Lead salt stabilizer is PVC
The most frequently used heat stabilizer, cheap, heat stability is good, but its toxicity is big, and direct labor and environment are worked the mischief, because
This, national governments propose more and more many restrictions to the use of lead salt stabilizer, and consumption is in falling tendency in recent years；Due to having
Machine stabilizer has been entirely free of metallic element, can thoroughly solve the problems, such as that heavy metal pollution causes extensive concern；But pure have
It is exactly that thermostable effect is poor that the heat stabilizer of machine also has a critical defect, and existing organic heat stabilizers are all typically at present
Auxiliary stabilizer as metal type thermal stabilizing agent uses；With going deep into that organic heat stabilizers are studied, in the past few years constantly have
New organic thermally-stabilised be developed release, its effect is also become better and better, and nitrogenous class organic heat stabilizers are in organic heat stabilizers
Middle stablizing effect is especially prominent, thus the combination of the heat stabilizer of the zinc-base of environment-friendly type and organic compound base will obtain new
The motive force of development and the market space, have the trend developing into main stabilizer.
Uracil zinc heat stabilizer is the class Novel thermostable being synthesized under catalysts conditions by uracil and zinc nitrate
Agent, because it has the ability replacing unstable chlorine atom, and replaces unstable chlorine atomic energy and eliminates at the very start and cause PVC
Degradation factors with stop PVC degrade, so such nitrogenous zinc-base organic heat stabilizers have attracted grinding of substantial amounts of experts and scholars
Study carefully；But uracil zinc heat stability is quite as lead salt stabilizer, itself there is no lubricity, in order to improve its lubricity, usually
The compounds such as lubricant, antioxidant, brucite and auxiliary heat stabilizer are added to carry out the compounding uracil with acquisition excellent performance
Zinc composite stabilizer；Uracil zinc composite stabilizer not only can replace the poisonous stabilizer of lead cadmium salt class, and has fairly good
Heat stability, light stability and tinting strength, tinting power, be a kind of heat stabilizer of environmental protection.
There are good dispersibility, the compatibility, processing flowing in uracil zinc composite stabilizer and the polyvinyl chloride resin course of processing
Property, wide adaptability, product surface fineness is excellent；Good heat stability, initial stage form and aspect are little, no precipitation phenomenon；Without heavy metal and
Other toxic components, no sulfation；The Congo red testing time is long, has excellent electrical insulating property, free from admixture, has efficiently resistance to
Hou Xing；Compared to zinc stearate, uracil zinc improves Zn content, has the effect that good suppression zinc burns, can overcome individually makes
The shortcoming burnt with the zinc that zinc stearate exists.
In the manufacture of foam article, the auxiliary agent that polymeric matrix produces foam structure can be made to be referred to as foaming agent,
There are organic foaming agent, inorganic foaming agent；Under normal circumstances, the decomposition temperature scope of organic foaming agent is narrower, as long as processing conditionss
Control proper it is possible to be effectively prevented melt to produce the too early phenomenon that foams, and there is preferable dispersibility in the polymer,
Deposit and therefore the fine and closely woven uniform expanded material of abscess can be prepared using organic foaming agent；AC foaming agent is maximum the having of consumption on market
Machine foaming agent, have the advantages that gas forming amount is big, good dispersion, low price and analyte is nontoxic, odorless, environmental protection；AC decomposition is released
, based on nitrogen, the permeability of nitrogen is less for the gas put, and is the optimum selection for preparing expanded material.Inorganic foaming agent
Have：Sodium bicarbonate（Sodium bicarbonate）Deng.
Content of the invention
It is an object of the invention to provide a kind of special uracil zinc composite stabilizer of novel environment friendly foaming PVC, improve zinc
Content, is successfully realized high zinc content stabilizer formula, and this stabilizer is high temperature resistant, have and PVC between the preferable compatibility and
Dispersibility, compared to zinc stearate, uracil zinc has the effect that good suppression zinc burns, and processability greatly improves, and the later stage is aging
Performance and sun-proof weatherability significantly improve.
The technical solution used in the present invention is as follows：
A kind of preparation and application of the special uracil zinc composite stabilizer of novel environment friendly foaming PVC are it is characterised in that preparation process
As follows：
Step one, the preparation of uracil zinc；
On the basis of the quality of total reactant, produce uracil zinc according to following formula：
100 parts of uracil
Phase transfer catalyst 1-2 part
Water 400-520 part
Strong aqua ammonia 200-260 part
Zinc nitrate 100-160 part
Isopropanol 150-210 part
Add uracil and water according to said ratio in 2L there-necked flask, be heated with stirring to 50 °C until uracil is completely molten
Then strong aqua ammonia and phase transfer catalyst are sequentially added in reactor by said ratio, after being uniformly dispersed, sequentially to this by solution
Add zinc nitrate and isopropanol in solution, and continue stirring reaction 2h at this temperature；After question response terminates, it is down to room temperature and takes out
The precipitation sucking filtration of generation is finally gone out by reactant mixture, is cleaned with distilled water, in vacuum drying oven drying product.Finally will
It is dried, grinds, so that uracil zinc slaine is obtained.
Step 2, compounds reaction；
On the basis of the quality of total reactant, produce according to following formula：
Uracil zinc slaine 15-5 part
Zinc stearate 5-15 part
Antioxidant 1-5 part
Auxiliary heat stabilizer 1-5 part
Lubricant 10-20 part
Acid-acceptor 20-50 part
By said ratio, reactant feed homogenizer is stirred 10min, obtain composite thermal stabilizer product.
Lubricant described in described lubricant is external lubricant and in-lubricant, butyl stearate, tetramethylolmethane Hard Fat
Acid esters, fatty acid complex ester, stearic acid, liquid white beeswax, hard paraffin, Tissuemat E, OPE, synthetic wax, Fischer-Tropsch
One of wax, microwax, vegetable wax, mineral wax and tetramethylolmethane complex ester or more than one mixing of mixing in any proportion
Thing.
Described auxiliary heat stabilizer mainly has：Triphenyl phosphite, tridecyl phosphite, trisnonyl phenyl phosphite,
Phosphorous acid three monooctyl ester, beta-diketon and salt, acetylacetonate, single Bis(pentaerythritol), amino uracil and salt, uracil zinc salt, urea
Pyrimidine carboxylic zinc, dihydrogen pyridine derivative, nitrogenous amino-compound, crotonatess derivant, soybean protein derivant, insulin
Derivant, diazo compound derivative, containing polyol, antioxidant 1010,1076,268, light stabilizer combines for one or more
Thing.
Described antioxidant is carbonates antioxidant, predominantly double Lauryl Alcohol esters, double ten four carbon alcohols esters and double 18
Carbon alcohol ester, one of 1010,1076,168 or more than one mixture of mixing in any proportion.
Described phase transfer catalyst is tetrabutyl ammonium bromide, tetrabutylammonium chloride, 4-butyl ammonium hydrogen sulfate and trioctylphosphine
One of ammonio methacrylate or more than one mixture of mixing in any proportion.
Specific embodiment
Embodiment one
Step one, the preparation of uracil zinc；
On the basis of the quality of total reactant, produce uracil zinc according to following formula：
100 parts of uracil
2 parts of phase transfer catalyst
520 parts of water
260 parts of strong aqua ammonia
160 parts of zinc nitrate
210 parts of isopropanol
Add uracil and water according to said ratio in 2L there-necked flask, be heated with stirring to 50 °C until uracil is completely molten
Then strong aqua ammonia and phase transfer catalyst are sequentially added in reactor by said ratio, after being uniformly dispersed, sequentially to this by solution
Add zinc nitrate and isopropanol in solution, and continue stirring reaction 2h at this temperature；After question response terminates, it is down to room temperature and takes out
The precipitation sucking filtration of generation is finally gone out by reactant mixture, is cleaned with distilled water, in vacuum drying oven drying product, finally will
It is dried, grinds, so that uracil zinc slaine is obtained.
Step 2, compounds reaction；
On the basis of the quality of total reactant, produce according to following formula：
15 parts of uracil zinc slaine
15 parts of zinc stearate
5 parts of antioxidant
5 parts of auxiliary heat stabilizer
15 parts of lubricant
35 parts of brucite
By said ratio, reactant feed homogenizer is stirred 10min, obtain composite thermal stabilizer product.
Experiment and performance test
Extrusion foaming is adopted to prepare PVC foam material according to following formula：
100 parts of PVC
1 part of processing aid
Organic foaming agent（AC) 0.3 part
0.6 part of inorganic foaming agent (sodium bicarbonate)
1 part of nucleator
8 parts of foaming control agent
0.4 part of compounded lubricant
2 parts of titanium dioxide
10 parts of precipitated calcium carbonate
4 parts of uracil zinc composite stabilizer
Mixture is mediated in high-speed kneading machine 10min, by roll-in 5min under conditions of mixture on a mill 185 DEG C,
Tabletting, is cut into 2cm × 2cm blockage sample after taking piece, require according to GB/T 7141-92 standard, PVC piece is grouped in order
It is placed in ageing oven, at 190 ± 1 DEG C, carries out oven ageing experiment test, take out test piece every 5 min, observe and record examination
The change of piece colourity, till being continued until that black in test piece, according to ASTM D1925-70, records its color change, knot
Fruit is shown in Table 1.
Table 1 foam sample thermostability test result table
| Time/min | 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 |
| Color change | Colourless | Colourless | Colourless | Colourless | Colourless | Colourless | Pale yellow | Pale yellow | Shallow palm fibre | Brown |
Test result indicate that, sample occurs the time needed for color change longer, illustrates that the thermal stability of product is preferable.
Embodiment two
Step one, the preparation of uracil zinc；
On the basis of the quality of total reactant, produce uracil zinc according to following formula：
100 parts of uracil
1.7 parts of phase transfer catalyst
490 parts of water
240 parts of strong aqua ammonia
140 parts of zinc nitrate
190 parts of isopropanol
Add uracil and water according to said ratio in 2L there-necked flask, be heated with stirring to 50 °C until uracil is completely molten
Then strong aqua ammonia and phase transfer catalyst are sequentially added in reactor by said ratio, after being uniformly dispersed, sequentially to this by solution
Add zinc nitrate and isopropanol in solution, and continue stirring reaction 2h at this temperature；After question response terminates, it is down to room temperature and takes out
Reactant mixture；Finally the precipitation sucking filtration of generation is gone out, cleaned with distilled water, in vacuum drying oven drying product.Finally will
It is dried, grinds, so that uracil zinc slaine is obtained.
Step 2, compounds reaction；
On the basis of the quality of total reactant, produce according to following formula：
10 parts of uracil zinc slaine
20 parts of zinc stearate
5 parts of antioxidant
5 parts of auxiliary heat stabilizer
15 parts of lubricant
30 parts of brucite
By said ratio, reactant feed homogenizer is stirred 10min, obtain composite thermal stabilizer product.
Experiment and performance test
According to following formula by PVC resin powder, processing aid, foaming agent, nucleator and preparation uracil zinc composite stabilizer
Mixing, adopts moulded from foam to prepare PVC foam material according to following formula：
100 parts of PVC
1 part of processing aid
0.3 part of organic foaming agent
0.6 part of inorganic foaming agent
1 part of nucleator
8 parts of foaming control agent
0.4 part of compounded lubricant
2 parts of titanium dioxide
10 parts of precipitated calcium carbonate
4 parts of uracil zinc composite stabilizer
Mixture is mediated in high-speed kneading machine 10min, by roll-in 5min under conditions of mixture on a mill 185 DEG C,
Tabletting, is cut into 2cm × 2cm blockage sample after taking piece, require according to GB/T 7141-92 standard, PVC piece is grouped in order
It is placed in ageing oven, at 190 ± 1 DEG C, carries out oven ageing experiment test, take out test piece every 5 min, observe and record examination
The change of piece colourity, till being continued until that black in test piece, according to ASTM D1925-70, records its color change, knot
Fruit is shown in Table 2.
Table 2 foam sample thermostability test result table
| Time/min | 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 |
| Color change | Colourless | Colourless | Colourless | Colourless | Colourless | Colourless | Pale yellow | Pale yellow | Shallow palm fibre | Brown |
Test result indicate that, sample occurs the time needed for color change longer, illustrates that the thermal stability of product is preferable.
Embodiment three
Step one, the preparation of uracil zinc；
On the basis of the quality of total reactant, produce uracil zinc according to following formula：
100 parts of uracil
1.5 parts of phase transfer catalyst
460 parts of water
220 parts of strong aqua ammonia
120 parts of zinc nitrate
170 parts of isopropanol
Add uracil and water according to said ratio in 2L there-necked flask, be heated with stirring to 50 °C until uracil is completely molten
Then strong aqua ammonia and phase transfer catalyst are sequentially added in reactor by said ratio, after being uniformly dispersed, sequentially to this by solution
Add zinc nitrate and isopropanol in solution, and continue stirring reaction 2h at this temperature；After question response terminates, it is down to room temperature and takes out
The precipitation sucking filtration of generation is finally gone out by reactant mixture, is cleaned with distilled water, in vacuum drying oven drying product, finally will
It is dried, grinds, so that uracil zinc slaine is obtained.
Step 2, compounds reaction；
On the basis of the quality of total reactant, produce according to following formula：
5 parts of uracil zinc slaine
25 parts of zinc stearate
5 parts of antioxidant
5 parts of auxiliary heat stabilizer
15 parts of lubricant
30 parts of brucite
By said ratio, reactant feed homogenizer is stirred 10min, obtain composite thermal stabilizer product.
Experiment and performance test
Extrusion foaming is adopted to prepare PVC foam material according to following formula：
100 parts of PVC
1 part of processing aid
0.3 part of organic foaming agent
0.6 part of inorganic foaming agent
1 part of nucleator
8 parts of foaming control agent
0.4 part of compounded lubricant
2 parts of titanium dioxide
10 parts of precipitated calcium carbonate
4 parts of uracil zinc composite stabilizer
Mixture is mediated in high-speed kneading machine 10min, by roll-in 5min under conditions of mixture on a mill 185 DEG C,
Tabletting, is cut into 2cm × 2cm blockage sample after taking piece, require according to GB/T 7141-92 standard, PVC piece is grouped in order
It is placed in ageing oven, at 190 ± 1 DEG C, carries out oven ageing experiment test, take out test piece every 5 min, observe and record examination
The change of piece colourity, till being continued until that black in test piece, according to ASTM D1925-70, records its color change, knot
Fruit is shown in Table 3.
Table 3 foam sample thermostability test result table
| Time/min | 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 |
| Color change | Colourless | Colourless | Colourless | Colourless | Colourless | Colourless | Pale yellow | Pale yellow | Shallow palm fibre | Brown |
Test result indicate that, sample occurs the time needed for color change longer, illustrates that the thermal stability of product is preferable.
Comparative example one
On the basis of the quality of total reactant, produce according to following formula：
30 parts of zinc stearate
5 parts of antioxidant
5 parts of auxiliary heat stabilizer
10 parts of lubricant
30 parts of brucite
By said ratio, reactant feed homogenizer is stirred 10min, obtain composite thermal stabilizer product.
Moulded from foam is adopted to prepare PVC foam material according to following formula：
100 parts of PVC
1 part of processing aid
0.3 part of organic foaming agent
0.6 part of inorganic foaming agent
1 part of nucleator
8 parts of foaming control agent
0.4 part of compounded lubricant
2 parts of titanium dioxide
10 parts of precipitated calcium carbonate
4 parts of zinc stearate compound stabilizers
Mixture is mediated in high-speed kneading machine 10min, by roll-in 5min under conditions of mixture on a mill 185 DEG C,
Tabletting, is cut into 2cm × 2cm blockage sample after taking piece, require according to GB/T 7141-92 standard, PVC piece is grouped in order
It is placed in ageing oven, at 190 ± 1 DEG C, carries out oven ageing experiment test, take out test piece every 5 min, observe and record examination
The change of piece colourity, till being continued until that black in test piece, according to ASTM D1925-70, records its color change, knot
Fruit is shown in Table 5.
Table 5 foam sample thermostability test result table
| Time/min | 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 |
| Color change | Colourless | Colourless | Colourless | Colourless | Pale yellow | Shallow palm fibre | Brown | Black | Black | Black |
Test result indicate that, it is more early during uracil zinc composite stabilizer that sample occurs the time needed for color change relatively to add, this
Illustrate that the product heat resistance adding zinc stearate is more poor than the heat resistance adding uracil zinc composite stabilizer.
According to the thermostability time of above-described embodiment and comparative example can be seen that the present invention using synthesis uracil zinc with
Common zinc stearate, organic auxiliary stabilizer, lubricant, antioxidant compounding use, can preferably improve the heat-resisting of PVC product
Performance, improves discolouration, improves the processing heat stability of PVC product, be a kind of novel environment friendly to be applied to foaming PVC special
With the production method of uracil zinc composite stabilizer, have no report.
Claims (6)
1. a kind of preparation and application of the special uracil zinc composite stabilizer of novel environment friendly foaming PVC are it is characterised in that preparation step
Suddenly as follows：
Step one, the preparation of uracil zinc；
On the basis of the quality of total reactant, produce uracil zinc according to following formula：
100 parts of uracil
Phase transfer catalyst 1-2 part
Water 400-520 part
Strong aqua ammonia 200-260 part
Zinc nitrate 100-160 part
Isopropanol 150-210 part
Add uracil and water according to said ratio in 2L there-necked flask, be heated with stirring to 50 °C until uracil is completely molten
Then strong aqua ammonia and phase transfer catalyst are sequentially added in reactor by said ratio, after being uniformly dispersed, sequentially to this by solution
Add zinc nitrate and isopropanol in solution, and continue stirring reaction 2h at this temperature；After question response terminates, it is down to room temperature and takes out
The precipitation sucking filtration of generation is finally gone out by reactant mixture, is cleaned with distilled water, in vacuum drying oven drying product, finally will
It is dried, grinds, so that uracil zinc slaine is obtained；
Step 2, compounds reaction；
On the basis of the quality of total reactant, produce according to following formula：
Uracil zinc slaine 5-25 part
Zinc stearate 8-15 part
Antioxidant 5-8 part
Auxiliary heat stabilizer 1-5 part
Lubricant 10-18 part
Acid-acceptor（Brucite) 10-35 part
By said ratio, reactant feed homogenizer is stirred 10min, obtain composite thermal stabilizer product.
2. the preparation of the special uracil zinc composite stabilizer of a kind of novel environment friendly foaming PVC as claimed in claim 1, its feature
It is：Described lubricant is described lubricant is external lubricant and in-lubricant, butyl stearate, tetramethylolmethane stearic acid
Ester, fatty acid complex ester, stearic acid, liquid white beeswax, hard paraffin, Tissuemat E, OPE, synthetic wax, Fischer-Tropsch wax,
One of microwax, vegetable wax, mineral wax and tetramethylolmethane complex ester or more than one mixture of mixing in any proportion.
3. the preparation of the special uracil zinc composite stabilizer of a kind of novel environment friendly foaming PVC as claimed in claim 1, its feature
It is：Described auxiliary stabilizer mainly has：Triphenyl phosphite, tridecyl phosphite, trisnonyl phenyl phosphite, phosphorous acid
Three monooctyl esters, beta-diketon and salt, acetylacetonate, single Bis(pentaerythritol), amino uracil and salt, uracil zinc salt, uracil carboxylic
Sour zinc, dihydrogen pyridine derivative, nitrogenous amino-compound, crotonatess derivant, soybean protein derivant, insulin derive
Thing, diazo compound derivative, contain polyol, one or more compositions；Epoxide, mainly epoxy soybean oil, ring
One of oxygen Oleum Ricini, butyl epoxy stearate or more than one mixture of mixing in any proportion.
4. the preparation of the special uracil zinc composite stabilizer of a kind of novel environment friendly foaming PVC as claimed in claim 1, its feature
It is：Described antioxidant is carbonates antioxidant, predominantly double Lauryl Alcohol esters, double ten four carbon alcohols esters and double octadecanol
In ester, 1010,1076,168 one or more mixture mixing in any proportion.
5. heterogeneous system uracil carboxylic acid zinc PVC stabilizer novel preparation method as claimed in claim 1 is it is characterised in that institute
The phase transfer catalyst stated is tetrabutyl ammonium bromide, tetrabutylammonium chloride, 4-butyl ammonium hydrogen sulfate and tri-n-octyl methyl ammonium chloride
One of or more than one mixture of mixing in any proportion.
6. heterogeneous system uracil carboxylic acid zinc PVC stabilizer novel preparation method as claimed in claim 1 is it is characterised in that institute
The acid-acceptor stated is：Calcium Carbonate, Pulvis Talci, silica flour stone, kieselguhr, calcium alum clay, red mud, zeolite, molecular sieve, brucite etc..
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| CN106867282A (en) * | 2017-03-06 | 2017-06-20 | 邵阳学院 | Modified calcium magnalium hydrotalcite for PVC heat stabilizer and preparation method thereof |
| CN109651695A (en) * | 2018-12-30 | 2019-04-19 | 无锡会通轻质材料股份有限公司 | A kind of easy clinkering, high temperature tolerance polyethylene foamed bead and preparation method thereof |
| CN112341734A (en) * | 2020-11-30 | 2021-02-09 | 山东慧科助剂股份有限公司 | Environment-friendly nitrogen-containing organic zinc PVC heat stabilizer for transparent products and preparation method thereof |
| CN112778575A (en) * | 2021-01-13 | 2021-05-11 | 徐州工业职业技术学院 | Heat stabilizer composition for transparent PVC and application thereof |
| CN113354865A (en) * | 2021-06-16 | 2021-09-07 | 营口风光新材料股份有限公司 | Compound auxiliary agent for PVC |
| CN113444287A (en) * | 2021-06-23 | 2021-09-28 | 浙江宏天新材料科技有限公司 | Modified hydrotalcite, preparation method thereof, PVC heat stabilizer and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106867282A (en) * | 2017-03-06 | 2017-06-20 | 邵阳学院 | Modified calcium magnalium hydrotalcite for PVC heat stabilizer and preparation method thereof |
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| CN109651695A (en) * | 2018-12-30 | 2019-04-19 | 无锡会通轻质材料股份有限公司 | A kind of easy clinkering, high temperature tolerance polyethylene foamed bead and preparation method thereof |
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| CN112341734A (en) * | 2020-11-30 | 2021-02-09 | 山东慧科助剂股份有限公司 | Environment-friendly nitrogen-containing organic zinc PVC heat stabilizer for transparent products and preparation method thereof |
| CN112778575A (en) * | 2021-01-13 | 2021-05-11 | 徐州工业职业技术学院 | Heat stabilizer composition for transparent PVC and application thereof |
| CN113354865A (en) * | 2021-06-16 | 2021-09-07 | 营口风光新材料股份有限公司 | Compound auxiliary agent for PVC |
| CN113444287A (en) * | 2021-06-23 | 2021-09-28 | 浙江宏天新材料科技有限公司 | Modified hydrotalcite, preparation method thereof, PVC heat stabilizer and application |
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Application publication date: 20170222 |