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Oxidized graphite / rare earth stabiliser for PVC and preparation thereof

The technology of rare earth stabilizer and auxiliary stabilizer is applied in the field of graphite oxide/rare earth stabilizer for PVC and its preparation, which can solve the problems of easy discoloration, and achieve the effects of improving compatibility, improving thermal stability efficiency, and delaying outdoor aging.

Active Publication Date: 2009-07-15
常熟紫金知识产权服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the defective of existing above-mentioned technology, the object of the present invention is to provide a kind of graphite oxide / rare earth salt stabilizer and preparation method thereof for PVC, which is a A lead-free, tin heavy metal salt, which solves the disadvantage of easy discoloration of existing stabilizers, non-toxic, efficient, environmentally friendly graphite oxide / rare earth stabilizer for PVC

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Heat epoxy oleic acid 50kg and water 250kg to 80°C, add catalyst (Zn 2+ Salt) 0.2kg, stir at 70-85°C, add 2kg of calcium oxide, keep stirring for 2-4 hours, add 120kg of lanthanum nitrate, 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 120kg of the above-mentioned materials prepared in 200kg graphite oxide, add 1000kg of solvent as a dispersion medium (water or ethanol) and stir for 2 hours, add 20kg of surfactant pentaerythritol ester, stir for 20min, add stearic acid 15kg, poly Vinyl wax 6kg. Kneading and stirring for 30 minutes, surface treatment, centrifugal drying, crushing, sieving, and packaging.

Embodiment 2

[0045] Heat 50kg of oil epoxy acid and 200kg of water to 80°C, add catalyst (Zn 2+ salt) 0.2kg, stirred at 70-85°C, added 2kg of calcium oxide, kept stirring for 2-4 hours, added 100kg of lanthanum nitrate, stirred at room temperature for 2 hours, formed a uniform material, went through centrifugal dehydration, and dried to obtain organic rare earth salt.

[0046] Disperse 100kg of the above-mentioned materials prepared in 200kg of graphite oxide, add 400kg of solvent as a dispersion medium (water or ethanol) and stir for 2 hours, add 15kg of surfactant triphenoxyphosphine, stir for 20min, add 15kg of stearic acid . Knead and stir for 30 minutes, centrifugally dry, crush, sieve and pack.

Embodiment 3

[0048] Heat 50kg of epoxy oleic acid and 200kg of water to 80°C, 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 100kg of cerium nitrate, stirred at room temperature for 2 hours to form a uniform material, went through centrifugal dehydration, and dried to obtain organic rare earth salt.

[0049] Disperse 100kg of the prepared above-mentioned materials into 200kg graphite oxide, add 500kg of solvent as a dispersion medium (water or ethanol) and stir for 2 hours, add 30kg of surfactant triphenoxyphosphine, stir for 20min, add 15kg of stearic acid . Knead and stir for 30 minutes, centrifugally dry, crush, sieve and pack.

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PUM

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Abstract

The invention relates to an oxidized graphite / rare-earth stabilizing agent used in PVC and a preparation method thereof; wherein the stabilizing agent comprises according to the parts by weight: 50-80 of oxidized graphite, 1-40 parts of organic rare-earth salts, 200-500 of dispersive medium, 1-20 of surface modification, and 10-50 of assistant stabilizing agent. The rare-earth salts are obtained by organizing lanthanide series inorganic rare-earth salts and long-chain fatty acids. The dispersive medium is water or ethanol. The surface modification is pentaerythritol ester, triple phenoxyl phosphorus or acrylic ester. The assistant stabilizing agent is dibenzoyl methane, stearic acid, polyethylene wax or compound thereof. The invention has super high thermal stability, good thermal conductivity and chemical durability and good interface adhesive property with resin, high self lubricity, good ultraviolet absorption performance, strong ultraviolet radiation absorption capabilitly and obvious reinforcement effect.

Description

technical field [0001] The invention relates to a plastic composite agent composition and a preparation method thereof, in particular to a graphite oxide / rare earth stabilizer for PVC and a preparation method thereof. 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 current price of lead has increased significantly The rise also accelerated the elimination of lead-based stabilizers. The main substitute of lead-based stabilizers—calcium / zinc stabilizers have defects such as poor stabilization effect and easy discoloration when heated, and have not been widely recognized by the market. Therefore, it is imperative to find a reasonably priced, efficient, and non-toxic heat stabilizer for PVC as soon as possible. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): C08K9/00C08L27/06
Inventor 章峻方珏徐九春周宁琳莫宏朱皓淼马振毛沈健
Owner 常熟紫金知识产权服务有限公司
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