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Mica/rare-earth salt stabilizer for PVC and preparation method thereof
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A rare earth stabilizer and rare earth salt technology, applied in the chemical field, can solve the problems of easy discoloration and so on
Inactive Publication Date: 2009-06-10
DONGGUAN YEQING ELECTRIC IND
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Summary
Abstract
Description
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Problems solved by technology
[0003] The purpose of the present invention is just in order to overcome the defect of existing above-mentioned technology, provide a kind of lead-free, tin heavy metal salt, solve the shortcoming of easy discoloration of existing stabilizer, nontoxic, efficient, environment-friendly PVC uses mica / rare earth stabilizer
Method used
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Examples
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Effect test
Embodiment 1
[0039] In a stainless steel reaction kettle with a stirrer, add 50kg of oleic acid and 250kg of water, stir after adding and melting, add catalyst (Zn 2+ Salt) 0.2kg, stir and add calciumoxide 2kg at 70-85°C, keep stirring for 2-4 hours, add lanthanumnitrate 120kg, stir at room temperature for 2 hours to form a uniform material, go through centrifugal dehydration, dry, and pulverize to obtain organic rare earth salts.
[0040] Disperse 120kg of the prepared above-mentioned materials into 200kg of mica, add 800kg of solvent as a dispersion medium (water or ethanol) and stir for 2 hours, add 24kg of surfactant pentaerythritol ester, stir for 20min, add 15kg of stearic acid, polyethylenewax 20kg. Knead and stir for 30 minutes, centrifugally dry, crush, sieve and pack.
Embodiment 2
[0042] In a stainless steel reactor with a stirrer, add lauric acid 50kg and water 200kg, stir after adding 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 100kg of ceriumnitrate, 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 .
[0043] Disperse 100kg of the prepared above-mentioned materials into 200kg of mica, add 1200kg of solvent as a dispersion medium (water or ethanol) and stir for 2 hours, then add 15kg of surfactant triphenoxyphosphine, stir for 20min, and add 45kg of stearic acid. Knead and stir for 30 minutes, centrifugally dry, crush, sieve and pack.
Embodiment 3
[0045] In a stainless steel reaction kettle with a stirrer, add 50kg of oleic acid and 250kg of water, stir after adding and melting, add catalyst (Zn 2+ Salt) 0.2kg, stirred at 70-85°C and added 2kg of calcium oxide, kept stirring for 2-4 hours, added 120kg of lanthanumhydrochloride, stirred at room temperature for 2 hours to form a uniform material, went through centrifugal dehydration, and dried to obtain organic rare earth salt.
[0046] Disperse 120 kg of the prepared above-mentioned materials into 200 kg of mica, add 500 kg of solvent as a dispersion medium (water or ethanol) and stir for 2 hours, add 3 kg of surfactant pentaerythritol ester, stir for 20 min, add 45 kg of stearic acid, polyethylenewax 60kg. Knead and stir for 30 minutes, centrifugally dry, crush, sieve and pack.
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Abstract
The invention relates to a mica / rare-earth salt stabilizing agent for PVC and a method for preparing the same. The mica / rare-earth salt stabilizing agent comprises the following compositions by mass percentage: 50 to 80 percent of mica, 6 to 40 percent of long-chain fatty acid organified rare-earth salt and 4 to 25 percent of surfactant. The organic rare-earth salt is obtained through the organification of lanthanide-system inorganic rare earth salt and long-chain fatty acid; and the long-chain fatty acid is selected from oleic acid, stearic acid, lauric acid and citric acid. Mica has a laminated structure; the dispersion medium is water and ethanol; and the surfactant is pentaerythritol ester, triphenyl phosphateoxygen and acrylate. The mica / rare-earth salt stabilizing agent has good ultraviolet absorption performance, strong capacity for ultraviolet absorption, obvious reinforcing effect, high thermal resistance, good dimension stability and chemical stability, high insulating resistance and large dielectric strength; the mica has good effect of flame retardance, can reduce the use amounts of alumina, aluminiumhydroxide and other flame retardants, and improves the capacity for flame retardance of the PVC material.
Description
technical field [0001] The invention discloses a mica / rare earth salt stabilizer for PVC and a preparation method thereof, is a plastic composite agent and a preparation method thereof, and belongs to the technical field of chemical industry. Background technique [0002] 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 price of lead has increased significantly. The rise also accelerated the elimination of lead-based stabilizers. At present, calcium / zinc stabilizers, the main substitute of lead-based stabilizers, have defects such as poor stabilization effect and easy discoloration when heated, so they cannot meet people's actual needs. Contents of the invention [0003] The purpose of the present invention is just in order to overcome the defect of existing above-...
Claims
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Application Information
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