Environmental plasticizer selection and performance and characteristics

Environmental plasticizer selection:
Different design requirements of PVC products use different nature plasticized system, and the ideal plasticizer should meet the following requirements. 1, high plasticizing effect, good compatibility, low volatility.
2, migration resistance is small, with time shift delay products, or other materials do not migrate to the surface of the contact.
3, and good resistance to extraction, contact with products like oil or aqueous solvent, a plasticizer does not spread to occur.
4, good low temperature performance, low temperature without losing its products in flexibility. 5, good insulation properties. 6, good mechanical properties 7, odorless, colorless, non-toxic 8, good flame retardant properties. 9, anti-fungal properties. 10, low WSD Metallic stearate  prices. Plasticizing effect really Maoyou, plastic corporate trust products. A, name: chloromethoxy fatty acid ester. Second, the formula: C20H37CI3, a molecular weight of 463 Third, technical indicators 1, Appearance: pale yellow oily liquid. 2, density (20C) :1.155-1 .175 3, Flash Point: (open) ≥ 170 ℃ -195 ℃. 4, heating loss (125C ± 1C.3h)% ≤ 0.4. Fourth, the performance and characteristics of the product is the company under the guidance of experts, after years of painstaking research the success of a new type of plasticizer, which is made from natural oils and alcohol transesterification reaction, then the reaction of a class of chlorinated has a high molecular weight, good compatibility with PVC, excellent WSD Aluminum hydroxide  plasticizing effect, fire resistant, non-toxic, environmentally friendly compound plasticizers. Since both the product ester structure, octyl dimethyl substitution o stupid butyrate as a plasticizer, while containing chlorine can be replaced by paraffin, improve flame retardancy and electrical insulation.
Fifth, products and applications: Environmental plasticizer compatibility with PVC resin than DOP, DOA, DBP, and can be widely used in environmental protection pvc products, such as leather, PVC cable, plastic film, plastic sandals, foam sandals, doors and windows  WSD Stabilizers for pipe and window seals, PVC profiles, soft board, all kinds of soft, hard pipe, decorative materials, rigid foam board and all use of plasticizer products, has a wide range of uses, and ultimately to achieve lower production costs purposes.

The main difference between the two points of stearic acid and calcium stearate

Stearic acid are calcium stearate are salts. Salt meanings:
Refers to a salt of a metal ion or an ammonium ion (+ NH4) ion or a compound with a combination of non-metallic ions . Such as sodium chloride , calcium nitrate , ferrous sulfate, ammonium acetate and the like , such as calcium sulfate , copper chloride , sodium acetate , the salt is generally in the metathesis reaction product , such as sodium sulfate and sodium hydroxide , and water is generated , there are also other salts can be generated in the reaction , e.g., a substitution reaction . Solution of a soluble salt of a conductive , because the solution to be freely mobile ions , therefore can be used as an electrolyte. It would appear that calcium stearate containing metal ions on the calcium salt , literally you can see . Acid meaning:
The acid in solution chemistry is the ionization of hydrogen ions and cations can completely compound of purple red litmus test solution . In a narrow sense can be divided into inorganic acids, organic acids . Acid proton theory: acid is a substance capable of releasing a proton referred acids. Stearic acid is an organic acid , a certain acidity. Loss of hydrogen ions combine with calcium metal thing is calcium stearate . 1 , the appearance of nature
Stearic acid is a white or creamy -white powder or crystalline lumps, which has a cross-section of microstrip shiny fine needle crystals; similar grease micro odorless, tasteless. Calcium stearate is a white powder , insoluble in water , cold ethanol and ether, dissolved in hot benzene, turpentine , and other organic solvents. Slightly soluble in hot ethanol and ether. When heated to 400 ℃ slowly decomposed , flammable , met decomposition of stearic acid and corresponding calcium , hygroscopic . 2, use comparison: stearic acid cream and cream for skin care products from these two types of emulsion , so that it becomes a stable white paste. Stearic acid or manufacturing honey and almond milk the main raw material . Stearic acid esters in cosmetics, soap industry is more widely used. Calcium stearate heat stabilizers for PVC and other plastic processing lubricants , mold release agents and the like. In rigid products , and the base of lead salts , lead soap can increase the rate of gelation . Also used in food packaging, medical equipment and other requirements of non-toxic soft film and equipment. Can be made of polyethylene , polypropylene, halogen absorbers to eliminate the adverse effects of residual catalyst on the color and stability. As plasticizers in rubber processing , enabling natural rubber and synthetic rubber to soften the whole , and almost no effect on curing . Also used as polyolefin fibers and molded plastic lubricants , grease thickening agent, textile waterproofing agent, paint flatting agent , plasticizer manufacturing plastic labels and so on. Also used in pencil manufacturing and medicine, perfume industry .

PE modified polyethylene wax and paraffin

A small amount of low density polyethylene (LDPE) was added to the molten wax to form a homogeneous mixture of the polyethylene dissolved, and cooled to obtain a modified PE wax, paraffin wax which is very classic processing methods. Adding a small amount of polyethylene wax crystallization changed, so that the melting point paraffin has heat stabilizer for panel  been greatly improved, improved from 50 degrees to 80-90 degrees, LDPE also has very good toughness paraffin, wax coating containing the PE not easy to crack. Because of these advantages, several decades ago, PE is widely used in the modified paraffin wax coated paper, cardboard, waterproof packaging for food, when very expensive PE film can not be applied to these areas.
PE modified so that the physical properties of paraffin wax has greatly improved, but even the plastic coating applications, it is fundamentally different and polyethylene wax, not  stearic acid paraffin polyethylene + = polyethylene wax.
PE modified paraffin wax can change a small molecular weight (300-400) nature, at higher temperatures, large-volatile paraffin. Bake 180 degrees for 20 minutes, PE modified paraffin thermal weight loss of about 10 percent, a variety of polyethylene wax TGA basically about 0.5%. Modified PE wax used in powder coatings, baking smoke very serious.
PVC external lubricant wax can do, but there are many disadvantages: Since paraffin and small molecular weight PVC resin and incompatible, paraffin easily precipitate from PVC products, wax  Chlorinated paraffin tends to reduce the strength of PVC products. PE modified paraffin wax can not change these properties, but it improves the viscosity increase than pure wax such external lubrication has improved stability than pure wax.
For masterbatches, PE modified relatively pure paraffin wax, the viscosity increased, a shearing force increases, the relative genuine purpose polyethylene wax, PE wax or a modification of the pigment is difficult to effect uniform dispersion.

Zinc stearate coatings more extensive use

Zinc stearate is mainly used in paint wood primer , from filling role in enhancing sexual polished . Transparency, transparency affect paint small, especially for transparent primer. With the direct method zinc stearate manufacturers gradually increased, so that under the pressure of competition in the domestic zinc stearate coatings performance has been dramatically improved. In addition to zinc stearate coating focus sanding and transparent , but also some other factors such as overall  Stabilizers for pipe performance oil absorption, thickening , particle size, dispersion and so on Wood have also been affected. Zinc stearate in wood primer There are several major technical indicators affect the performance of its paint : 1 , primer sanding of the wood , polished performance is a very important indicator in the paint , the usual method is to use the same test the coating formulations , while polished plate spray test in the same time , there is no fixed standard . 2 , transparency transparent primer , the transparency level of direct impact on the appearance of wood . Therefore, the water produced with zinc stearate is not transparent in the wood , mainly because of too many impurities . The direct method in the production of zinc stearate is able to meet the requirements of purity , but also a very high process requirements , a significant impact of different production processes for transparency , small differences may lead to huge differences in process on transparency .
3 , thickening the production of coatings manufacturers of zinc stearate thickening is not acceptable because the zinc stearate coating added to finished products , its viscosity determines factory index had settled down , even if the error is also in ± 500mP · s, so the test zinc stearate thickening method is generally used to  one pack stabilizer test rotary viscometer , viscosity and viscosity deviation good if just a few hours after the dispersion is greater than 500mP · s, regarded as thickening 4. suction oil absorption and thickening personally do not think the same concept , oil is in the same proportion of large amounts of added conditions to make the finished product viscosity, while the viscosity does not exceed a period of time to place the error value ± 500mP · s. Generally PU coating for oil absorption is not much demand because production will not have much impact , paint manufacturers have high requirements on oil absorption , which may be solvent paint manufacturers to add some more , and want to reduce the evaporation of the solvent , must find some high oil absorption material added to it , and oil absorption of zinc stearate relative to other additives are additives of high oil absorption .
5, the particle size of the indicators show that the particle size of the zinc stearate , are generally used to measure the degree of fineness . The easiest test is usually the result fineness fastest scraper fineness, generally adding a certain percentage of zinc in the alkyd resin dispersion , then add a little solvent viscosity good tune , then fineness meter testing, such test results are slightly larger than the actual fineness so, because the resin powder is wrapped in possession of a certain thickness , but as long as the standard set can be comparable and reproducible test method to measure this fineness is exceeded 6 , dispersed in paint Chlorinated paraffin  production process , there are many manufacturers mentioned dispersion problems. Under normal circumstances , zinc stearate dispersed in the paint is not a problem , but in the production process of zinc stearate , some indicators will also cause the dispersion of certain effects, such as zinc stearate acid value is too high , semi temperature is too high, there will be zinc in the coating dispersion of workers bad press pack too serious , but if the water is too high in zinc also appear crystallization problems , is considered dispersion bad .

Effect on the performance of PVC heat stabilizers how much you know

A series of complex organic PVC heat stabilizers have begun to enter the market and gradually replaced the traditional heavy metal stabilizers.
PVC heat stabilizers are indispensable in the process additives , awareness of their concerns with human health and  iron oxide black the surrounding environment is gradually increased, the world has promulgated a series of measures to limit the use of heavy metal heat stabilizers .
Outside the industry generally believe that awareness of PVC heat stabilizers environmental protection has become an irreversible trend, in the process of environmental protection PVC heat stabilizer , research and development , non-toxic , non-polluting , complex , and efficient heat stabilizers have been more widely application .
PVC resin having a self- HCL released catalytic or structural instability polyolefin produced PVC resin capable of addition reflection to prevent or reduce the decomposition of PVC resin . General characteristics of the formulations selected thermal stabilizer , features and requirements of the article to be considered. Here are some characteristics of people stabilizer :
1 lead salt stabilizer is mainly used in hard articles . Lead salt stabilizer has good heat stabilizers , excellent electrical properties , low cost and so on. However, its toxicity, easily contaminated products , can only produce opaque products. In recent years, large  iron oxide yellow numbers of composite stabilizer , stabilizer dangerous single component has been replaced . Features composite stabilizer is a dedicated and strong, little pollution , the advantages of simple ingredients and processing enterprises . But because no uniform standard , so the difference between the various composite stabilizer great .
2 barium cadmium -based stabilizers is a better performance heat stabilizers . PVC plastic sheeting used in wider . Usually barium cadmium and zinc and organic phosphite antioxidants and use .
3 . Calcium zinc stabilizers can be used as non-toxic stabilizers used in food packaging and medical devices, pharmaceutical packaging , but its stability is relatively low education , calcium -based stabilizers large amount of poor transparency , easy to bloom . Calcium zinc stabilizers usually used polyols and antioxidants to improve its performance, the PVC heat stabilizer  country has recently been Ca-Zn composite stabilizer for rigid pipes appear.
4 good thermal properties of the organic tin-based stabilizers , are preferred species for the transparent rigid PVC products , particularly octyl tin packaging products become almost indispensable toxic stabilizers .

Look plasticizer industry how to deal with future market

The news is no doubt consumers "Gospel ." With the enhancement of environmental awareness around the world and focus on aspects of chemical hazards to human health , have introduced on phthalates , the most commonly used types of phosphate plasticizers restrictions regulations and technical standards . Our country is in Asia plasticizer production, consumer, plasticizer production capacity of about 300 million tons, production of about 1.5 million tons . Because many companies related to international trade regulations insufficient attention on the face of the titanium dioxide anatase  endless variety of new regulations by surprise, in children's toys , food packaging , consumer goods and medical plastic products such as foreign trade industry has been a huge hit. Despite a greater impact , but the introduction of various international industry regulations is to ensure that the risk of harmful plasticizers are reasonable control and gradually replaced. Although the new international regulations to establish a high technical barriers, but once beyond, domestic enterprises from both technical and market while promoting industrial upgrading plasticizer .
President of the China Plastics Processing Industry Association, Liao pointed out that China's plastics industry is still huge room for development, but we must increase investment in technological innovation , attention to the introduction and training of technical personnel , to strengthen cooperation with universities and research institutes , tracking and abroad the latest trends in technology development , there are efforts to develop proprietary products and technologies with independent intellectual property rights , improve the overall level of technology and independent innovation capability . The role of plasticizer to provide mankind with high quality plastic products is indispensable , but it brings security issues , environmental hazards , pose a new challenge to humanity . R & D use of safe, environmentally friendly plasticizer has become an urgent  pvc additive task development of the industry . Accelerate the elimination of toxic plasticizers and promote the development of new non-toxic plasticizer has become an inevitable trend. Therefore , domestic enterprises must constantly monitor plasticizer regulations related fields exporter latest updates , progress and adjustments and changes , early good response. Second, to increase the new " non-toxic type", environmentally friendly plasticizer research and development efforts , the right to judge the market demand, timely adjustment of the production structure . It is reported that China plasticizer industry after decades of development, the industrial base has a considerable scale . Faced with new international regulations change constantly adjust product structure , more carbon black powder  advanced means of detection , evaluation method is more reasonable , a number of manufacturers have begun to catalyze a great effort under the new study , the separation process , vigorously develop and promote non-toxic , environmentally friendly and biodegradable growth plasticizers, the more cost-effective , more reliable security , a new generation of environmentally friendly plasticizer products to market.

All kinds of heat stabilizer heat discoloration Comment

Thermal stabilizers should preferably absorb both HCL, to eliminate the active site , the addition of a conjugated polyene chain , carbenium salt damage , etc. to prevent auto-oxidation , which does not produce the product of the catalytic degradation of PVC . The actual heat stabilizers have different functions due to exhibit different thermal stability characteristics , can be divided into early -type , long-term , intermediate -and versatile four . A ) cadmium , zinc soap is typical  Processing aid of early -type heat stabilizers , can quickly absorb HCL, and effectively substituted with carboxylate PVC unstable chlorine atom in the catalytic chain Cd, Zn , thereby effectively suppressing early degradation and coloring , but because of the consumption of fast and transformation products CdC12, ZnC12, but also off the HCL efficient catalyst PVC , PVC and thus lead to Chrolinated polyethylene  the degradation of the material suddenly vicious black , so poor long-term thermal stability. 2 ) barium, calcium soaps are typically long-term thermal stabilizers , absorption HCL function only and therefore can not inhibit coloring PVC , but the conversion product BaC12, CaC12 do not have catalytic activity , does not cause a sudden black PVC , long-term heat stability better. 3 ) fatty acids, organic tin are intermediate , both absorption HCL, can effectively replace with carboxylate unstable chlorine atoms PVC chain, and transformation products do not have catalytic activity.
 4 ) mercaptan organotin it Azodicarbonamide  has versatile features , while a variety of mechanisms can stabilize PVC, transformation products do not have catalytic activity , and therefore both excellent initial and long-term thermal stability effect.