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Montmorillonite/rare-earth stabilizer for PVC and preparation method thereof
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A rare earth stabilizer and montmorillonite technology, applied in the chemical industry, can solve problems such as easy discoloration, achieve high reinforcement, improve thermal stability efficiency, and improve impact resistance.
Active Publication Date: 2009-06-17
威海大河新材料科技股份有限公司
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Summary
Abstract
Description
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Problems solved by technology
[0004] The purpose of the present invention is just in order to overcome the above-mentioned defect of prior art, provide a kind of lead-free, tin heavy metal salt, solve the shortcoming of easily variable color of existing stabilizer, nontoxic, efficient, environment-friendly PVC uses montmorillonite / Rare earth stabilizer
Method used
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Examples
Experimental program
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Effect test
Embodiment 1
[0040] With epoxyoleic acid 50kg and water 250kg, after heating and melting, add catalyst (Zn 2+ Salt) 0.2kg, stir at 70-85°C, add 2kg of calciumoxide, keep stirring for 2-4 hours, add 120kg of lanthanumnitrate, stir at room temperature for 2 hours to form a uniform material, go through centrifugal dehydration, dry, and pulverize to obtain organic rare earth salt .
[0041] Disperse 120kg of the prepared above-mentioned materials into 200kg montmorillonite, add 200kg of solvent as dispersion medium (water or ethanol) and stir after 2 hours, add surfactant pentaerythritol ester 20kg, stir 20min, add stearic acid 15kg, poly Ethylenewax 6kg, dibenzoylmethane 2kg. Knead and stir for 30 minutes, perform surface treatment, pulverize, sieve, and pack.
Embodiment 2
[0043] With epoxyoleic acid 45kg and water 200kg, after heating and melting, add catalyst (Zn 2+ salt) 0.15kg, stirred at 70-85°C and added 1.6kg of calciumoxide, kept stirring for 2-4 hours, added 80kg of ceriumnitrate, stirred at room temperature for 2 hours to form a uniform material, went into centrifugal dehydration, and dried to obtain organic rare earth salt.
[0044] Disperse 100kg of the prepared above-mentioned materials into 250kg montmorillonite, add 500kg of solvent as a dispersion medium (water or ethanol) and stir for 2 hours, add 25kg of surfactant triphenoxyphosphorus, stir for 20min, add stearic acid 15kg, dibenzoylmethane 2kg. Knead and stir for 30 minutes, pulverize, sieve and pack.
Embodiment 3
[0046] With lauric acid 50kg and water 250kg, after heating and melting, add catalyst (Zn 2+ Salt) 0.2kg, stir at 70-85°C and add 2kg of caustic soda, keep stirring for 2-4 hours, add 110kg of lanthanum or cerium-based nitrate, stir at room temperature for 2 hours to form a uniform material, go through centrifugal dehydration, and dry to obtain Organic rare earth salts.
[0047] Disperse 20kg of the prepared above-mentioned materials into 200kg montmorillonite, add 500kg of solvent as dispersion medium (water or ethanol) and stir for 2 hours, add surfactant pentaerythritol ester 10kg, stir for 20min, add stearic acid 15kg, poly Ethylenewax 6kg, dibenzoylmethane 2kg. Knead and stir for 30 minutes, pulverize, sieve and pack.
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Abstract
The invention relates to a PVC montmorillonite / rare-earth stabilizing agent and a preparation method thereof, wherein, weight part components of the stabilizing agent comprise 100 of montmorillonite, 1 to 40 of organic rare-earth salts, 200 to 500 of dispersive medium, 1 to 10 of surface modifying agent, and 10 to 50 of auxiliary stabilizing agent. The organic rare-earth salts are prepared by organification of lanthanides inorganic rare-earth salt and long chainfatty acid. The long chainfatty acid is epoxyoleic acid, stearic acid, lauric acid or citric acid, taking up 5 percent to 40 percent of gross mass of the organic rare-earth salt. The long chainfatty acid takes up 20 percent to 40 percent of gross mass of the organic rare-earth salt. The invention overcomes defects of soft quality of traditional stabilizing agent and weak absorption ability of ultravioletradiation and is provided with fine stripping performance and high reinforcing ability, and can effectively improve anti-attacking performance of PVC compound materials, realizes fine annealing strengthening and strengthening effects of nanometer padding and is provided fine barrier function to ultravioletirradiation. The invention is suitable to PVC materials requiring high material mechanical strength.
Description
technical field [0001] The invention discloses a montmorillonite / rare earth salt stabilizer for PVC and a preparation method thereof, is a plastic composite stabilizer and a preparation method thereof, and belongs to the technical field of chemical industry. Background technique [0002] As we all know, PVC resin and its products have the disadvantages of thermal degradation and aging. Its processing temperature (above 160°C) is higher than its decomposition temperature (120-130°C). Heat stabilizers are added during processing to delay or prevent the thermal degradation of PVC resin. [0003] At present, more than 80% of China's PVC products still use highly toxic lead-based heat stabilizers, while the EU RoSH directive and China's Ministry of Construction Announcement No. 218 have clearly prohibited the use of lead-based heat stabilizers, and the current price of lead has increased significantly The rise also accelerated the elimination of lead-based stabilizers. The main...
Claims
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Application Information
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