cadmium stearate degradation

  • Degradation of barium-cadimium stabilized PVC in solution ...

    高达12%返现 · The degradation kinetics of PVC stabilized with barium and cadmium stearate has been studied in solution in inert atmosphere. Formation of HCl and metal chloride was followed along with the changes of UV and visible spectra. It has been shown that reaction between the stabilizer and labile chlorines originally present is insufficient to explain stabilization.

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  • All the information on Cadmium - Applications

    cadmium-bearing stabilisers retard the degradation processes in polyvinylchloride (pvc) which occur upon exposure to heat and ultraviolet light these stabilisers contain organic cadmium salts, usually carboxylates such as cadmium laurate or cadmium stearate, which are incorporated into pvc before processing and which arrest any degradation

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  • All the information on Cadmium - Stabilisers

    Cadmium Stabilisers Application Cadmium-based stabiliser systems have been used for many years due to their excellent performance qualities.Cadmium-bearing stabilisers are used to retard the degradation processes which occur in polyvinylchloride (PVC) and related polymers on exposure to heat and ultra violet light (sunlight).

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  • Metallic Stearates | Goldstab Organics Pvt. Ltd.

    Goldstab Cadmium Stearate restricts UV degradation and yellowing of the product. Goldstab Lead Stearate along with Goldstab Barium Stearate can improve the electrical properties of the product. Product Table Goldstab: A winning formula. Applications Businesses globally rely on our wealth of expertise and consistent performance.

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  • Thermal stabilization of polyvinyl chloride with ...

    高达12%返现 · Mar 06, 2017 · Generally, the thermal degradation behavior of PVC can be divided into two separate steps: (1) the first degradation step occurs in the temperatures between (240 and 345) °C by fast zip dehydrochlorination reactions leading to the formation of conjugated double bonds (polyenes) in the PVC backbone and elimination of HCl gas.

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  • Cadmium Exposure Assessment, Transport, and Environment ...

    Exposure to Environmental Cadmium. Cadmium is a chemical element and a natural component of the earth's crust. Human activities can increase human exposure to cadmium through mining and combustion, which bring more cadmium into the air, water, and soil. In the sections below, we summarize sources of human exposure to cadmium in air, water, plants, animals, food, soil, and

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  • Thermal stabilizers for poly(vinyl chloride): A review

    degradation chain, thereby preventing further dehydro-chlorination (Scheme 3) (Fisch and Bacaloglu, 1999; ... dibutyl tin maleate and barium-cadmium stearate stabilizers, which are commonly used industrially. The induction period (Ts) was influenced by ... the stearate stabilizer. A

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  • N-Substituted maleimides as thermal stabilizers for ...

    Jan 01, 1990 · The extent of discoloration was measured colorimetrically as a function of the degradation time by measuring the absorbance at ).-- 500 nm. Although the sample treated with dibutyl tin maleate showed the least degree of discoloration, those with the maleimides showed better results than the sample treated with cadmium-barium stearate.

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  • Degradation of barium-cadimium stabilized PVC in solution ...

    The degradation kinetics of PVC stabilized with barium and cadmium stearate has been studied in solution in inert atmosphere. Formation of HCl and metal chloride was followed along with the changes of UV and visible spectra. It has been shown that reaction between the stabilizer and labile chlorines originally present is insufficient to explain stabilization.

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  • Right to Know Hazardous Substance Fact Sheet

    Cadmium Stearate is a CARCINOGEN. HANDLE WITH EXTREME CAUTION. Contact can irritate the skin and eyes. Inhaling Cadmium Stearate can irritate the nose and throat. Exposure to Cadmium Stearate may cause a flu-like illness called metal fume fever. Cadmium Stearate can cause nausea, vomiting, diarrhea and abdominal pain.

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  • 硬脂酸镉;物理性质,化学性质,英文名,分子量,结构式,分子式,CAS号,

    名称:硬脂酸镉;Cadmium Stearate: 分子式:Cd(C 17 H 35 COO) 2 分子量:679.3566 CAS号:2223-93-0

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  • Cadmium Stearate - Cadmium Dioctadecanoate Latest Price ...

    Cadmium organic salts, commercially cadmium stearate or cadmium laurate containing 1 - 16% cadmium, are the most effective stabilizer for polymers especially for PVC and its related products to develops good initial colour and clarity as well as to retard the degradation against heat and UV.

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  • 硬脂酸镉_百度百科 - baike.baidu

    硬脂酸镉为白色细微粉末,不溶于水,溶于热乙醇、苯和松节油,在有机溶剂中加热溶解而冷却后成为胶状物,遇强酸分解成硬脂酸和相应的盐,有吸湿性。高毒,对呼吸道有刺激作用并可引起肺水肿;可破坏人体骨骼,引起骨质松软,周身骨骼疼痛等。用作聚氯乙烯等塑料的耐光透明稳定剂、高级 ...

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  • Mechanism of action of PVC thermal stabilizers, Journal of ...

    Jan 01, 1979 · So, as at first understood, zinc stearate influences PVC thermal degradation in a different way than cadmium stearate and the two remaining stabilizers that were discussed. Change in Color From Figure 2, it can be seen that half the quantity of zinc stearate has reacted after about 5 min of time of degradation.

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  • Thermal stabilizers for poly(vinyl chloride): A review

    degradation chain, thereby preventing further dehydro-chlorination (Scheme 3) (Fisch and Bacaloglu, 1999; ... dibutyl tin maleate and barium-cadmium stearate stabilizers, which are commonly used industrially. The induction period (Ts) was influenced by ... the stearate stabilizer. A

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  • Stabilization of poly(vinyl chloride). VIII. Synergisms ...

    The synergetic effect between epoxy compounds and synergetic metal soaps is ascribed to the action that the epoxides serve as an acceptor for the excessive cool color producing metal chloride produced from zinc stearate and cadmium stearate to retard the abrupt discoloration of stabilized PVC.

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  • US5073598A - Method for improving the processing ...

    A method for improving the processing characteristics of a polyethylene blend comprised of at least two polyethylene components having at least one dissimilar rheological property. The method comprises the steps of (a) establishing a functional relationship between free radical generator dosage and a rheological property for at least one polyethylene component of the polyethylene blend; (b ...

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  • Properties And Application Conditions Of Nine Plastic Heat ...

    Sep 24, 2021 · ⑥ Cadmium Stearate (CDST), melting point at about 100 ℃, insoluble in water. It is suitable for soft transparent PVC products. It is a thermal stability and light stability additive for products. The general dosage is 0.2% ~ 1.5%. ⑦ Calcium Stearate (CAST), melting point 125 ~ 150 ℃, insoluble in water. It is suitable to be used as heat ...

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  • Organic thermal stabilizers for rigid poly(vinyl chloride ...

    The stabilizing efficiencies were compared with that of dibasic lead carbonate (DBLC), dibasic lead stearate (DBLS), barium–cadmium–zinc stearate (Ba–Cd–Zn stearate), n-octyl tin ...

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  • Quantitative relationships between the parameters of ...

    Thermal degradation of polyvinyl chloride (PVC) has been extensively studied by a host of eminent researchers, both in terms of its mechanism, and effects. Arrhenius-type relationships have been proposed to correlate the loss of hydrogen chloride (HCl) with temperature and duration of thermal degradation. However, the rate of dehydrochlorination, does not always correlate with the loss of ...

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  • N-Substituted maleimides as thermal stabilizers for ...

    Abstract N -Substituted maleimides have been investigated as thermal stabilizers for plasticized PVC at 180°C in air by measuring the rate of dehydrochlorination and the extent of discoloration of the degraded polymer. The results reveal a higher stabilizing efficiency of the products investigated compared with basic lead carbonate, dibutyl tin maleate, and barium-cadmium stearate stabilizers ...

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  • Stearic Acid : Manufacturers, Suppliers, Wholesalers and ...

    The stearate salts of zinc, calcium, cadmium, and lead are used to soften PVC. Stearic acid is used along with castor oil for preparing softeners in textile sizing. They are heated and mixed with caustic potash or caustic soda. Related salts are also commonly

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  • WESTCO™ Cadmium Stearate halogenated polymer stabilizer

    WESTCO™ Cadmium Stearate - WESTCO™ Cadmium Stearate CAS# 2223-93-0 WESTCO™ Cadmium Stearate is an effective stabilizer for polymers, especially halogenated polymers. It retards thermal and UV degradation and is well suited for high temperature processing. WESTCO™ Cadmium Stearate promotes color retention and clarity.

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  • 硬脂酸镉;物理性质,化学性质,英文名,分子量,结构式,分子式,CAS号,

    名称:硬脂酸镉;Cadmium Stearate: 分子式:Cd(C 17 H 35 COO) 2 分子量:679.3566 CAS号:2223-93-0

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  • Cadmium Stearate - Cadmium Dioctadecanoate Latest Price ...

    Cadmium organic salts, commercially cadmium stearate or cadmium laurate containing 1 - 16% cadmium, are the most effective stabilizer for polymers especially for PVC and its related products to develops good initial colour and clarity as well as to retard the degradation against heat and UV.

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  • Cadmium-induced Cancers in Animals and in Humans

    Cadmium stearate—lubricant and plastic stabilizer. Cadmium sulfide—pigment. Human Exposures. As with most naturally occurring chemicals, such as, for example, asbestos and benzene, humans play a significant role in creating concentrated sources of cadmium and releasing it into the environment through activities such as mining, ...

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  • Metallic Stearates Archives - wrchem

    WESTCO™ Cadmium Stearate. WESTCO™ Cadmium Stearate is an effective stabilizer for polymers, especially halogenated polymers. It retards thermal and UV degradation and is

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  • Studies on NBR PVC Blends - Dyuthi Home

    stearate/cadmium stearate combination, the commonly used PVC stabilizer in NBR/PVC blends,, does not seem to produce any obvious deterioration ... degradation in the blend is not so obvious as before, and this might be due to the protection offered by the PVC phase. Curatives are added at E.

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  • RECENT ADVANCES IN PVC STABILITY WITH METAL AND

    barium—cadmium soaps combination ... Hexadiene formation pictures the PVC degradation and the substitution reaction pictures the ... stearate (6.66 phr) When zinc or cadmium stearates are used as stabilisers the stearic acid parallels chlorides formation and the consumption of stearates. It seems that after about 10 % of stabiliser

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  • Surface Order and Stability of Langmuir-Blodgett Films

    Jul 24, 1992 · rothberg, l, thermal disordering of langmuir-blodgett-films of cadmium stearate on sapphire, chemical physics letters 133: 67 (1987). google scholar. schlossman, m.l., relaxation and the reentrant appearance of phases in a molecular monolayer, physical review letters 66: 1599 (1991).

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  • What Are The Stabilizer And Its Mechanism Of Action ...

    Mar 06, 2021 · The catalytic degradation of PVC can be prevented by capturing the HCl, produced by thermal decomposition of HCl. Lead salts mainly act according to this mechanism, as well as metal soap, organotin, phosphite, epoxy, and so on. ... PVC Plastics Additives Cadmium Stearate. Heat Stabilizer for PVC. Barium Cadmium Zinc Stabilizer For Hose Pipes ...

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  • Stearates - BEANTOWN CHEMICAL- Stearates

    Research Chemicals in stock - Online Availability . Please click on Items below to view Product Information and Documentation (SDS, etc.)

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  • US4316852A - Manufacture of metallic soaps - Google Patents

    US4316852A US06/130,080 US13008080A US4316852A US 4316852 A US4316852 A US 4316852A US 13008080 A US13008080 A US 13008080A US 4316852 A US4316852 A US 4316852A Authority US United States Prior art keywords glycerine sub reaction mixture molten soap Prior art date 1979-03-29 Legal status (The legal status is an assumption and is not a legal conclusion.

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  • Cadmium (PIM 089) - INCHEM2

    1. NAME 1.1 Substance Cadmium 1.2 Group Cadmium (atomic number 48, relative atomic mass 112.40) occurs in the 0 and +2 oxidation states. It forms many divalent compounds, mostly inorganic. 1.3 Synonyms 1.4 Identification numbers 1.4.1 CAS number Cadmium 7440-43-9 Cadmium acetate hydrate 89759-80-8 Cadmium acetate dihydrate 5743-04-4 Cadmium carbonate 515-78-0 Cadmium

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  • Metal Soaps and Onepack Stabilizer Manufacturer ...

    Evergreen Chemical (Thailand) the manufacturer of metal stearate and onepack stabilizer uses the powerful motivation to make intellectual research, and rapid development to impact customer need. The high standard equipments and know-how create reliable solution and win-win cooperation as future innovation for customer.

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  • Cadmium wiki | TheReaderWiki

    Cadmium is a chemical element with the symbol Cd and atomic number 48. This soft, silvery-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury.Like zinc, it demonstrates oxidation state +2 in most of its compounds, and like mercury, it has a lower melting point than the transition metals in groups 3 through 11. ...

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