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Hindered amine light stabilizer with toughening effect and preparation method thereof

A technology of hindered amine light stabilizer and light stabilizer, which is applied in the field of light stabilizer and its preparation, can solve the problems of reducing intermolecular force, destroying the condensed state structure of materials, and reducing the mechanical properties of materials, so as to reduce physical loss, The best effect of improving thermal stability, compatibility and dispersion degree

Inactive Publication Date: 2014-05-07
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this type of hindered amine light stabilizer can effectively protect polymer materials from ultraviolet light, due to its own structural characteristics, it is mostly in liquid or powder form. When it is added to polymer materials, it is especially used in large amounts (over 2%), it will destroy the condensed structure of the material, reduce the force between molecules, and cause the mechanical properties of the material to decline, especially its impact strength (Ju Anqi, Gao Yuling, Ge Yanxia, ​​Wang Na, Zhang Huixuan, additives to PVC Effect of thermal stability and mechanical properties of / ABS blends, China Plastics, 2008, 3: 72-77; Xu Dezeng, Guo Jing, Cai Yuefen, Zhang Hong, Rheological properties and fiber mechanical properties of flame retardant polypropylene with flame retardant additives Influence, Journal of Dalian Institute of Light Industry, 2003, 1:11-13)

Method used

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  • Hindered amine light stabilizer with toughening effect and preparation method thereof
  • Hindered amine light stabilizer with toughening effect and preparation method thereof
  • Hindered amine light stabilizer with toughening effect and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] First add 100 parts of ethyl acrylate, 1 part of divinylbenzene, 4 parts of sodium dodecyl sulfonate, 2 parts of sodium carbonate and 200 parts of water to the reaction kettle, stir at 600 rpm for 0.5 hours, then Add 0.8 part of ammonium persulfate, and continue to stir at 600 rpm, heat up to 75 ℃ for 0.5 hours, then react at a stirring speed of 100 rpm for 3 hours to obtain a core emulsion; add 0.5 part to the core emulsion Ammonium persulfate, then add 40 parts methyl methacrylate and 60 parts 4-acryloyloxy-1,2,2,6,6-pentamethylpiperidine dropwise at a temperature of 75°C and a stirring speed of 100 rpm The mixture of pyridine is added dropwise within 3 hours, and the reaction is continued for 1 hour to obtain the polymer emulsion of the core-shell structure hindered amine light stabilizer; the above polymer emulsion is cooled to room temperature, and then the mass concentration is twice the volume of the polymer emulsion 5% CaCl 2 Aqueous solution demulsification, pre...

Embodiment 2

[0031] First add 100 parts of hexyl acrylate, 3 parts of diallyl terephthalate, 3 parts of sodium lauryl sulfate, 1 part of sodium bicarbonate and 300 parts of water into the reaction kettle, and stir at 400 rpm 0.7 hours, then add 1.0 part of potassium persulfate, and continue to stir at 400 rpm, heat up to 80 ℃ for 1 hour, then react at a stirring speed of 50 rpm for 4 hours to obtain a nuclear emulsion; Add 1.0 part of potassium persulfate into it, then add 80 parts of styrene and 40 parts of 4-methacryloyloxy-1,2,2,6,6-penta at a temperature of 80°C and a stirring speed of 50 rpm. The mixture of methylpiperidine was added dropwise within 3.5 hours, and the reaction was continued for another 1.5 hours to obtain the polymer emulsion of the core-shell structure hindered amine light stabilizer; the polymer emulsion was cooled to room temperature, and then 2.5 times the volume of the polymer emulsion The mass concentration is 10% CaCl 2 Aqueous solution demulsification, precipit...

Embodiment 3

[0034] First add 100 parts of butyl acrylate, 3 parts of diallyl maleate, 6 parts of sodium dodecyl sulfonate, 2 parts of sodium bicarbonate and 300 parts of water into the reactor, and stir at 800 rpm 1 hour, then add 1.5 parts of azobisisobutyronitrile, and continue stirring at 800 rpm, heating to 78°C for 0.8 hours, and then reacting at a stirring speed of 150 rpm for 3.5 hours to obtain a nuclear emulsion; Add 1.0 part of azobisisobutyronitrile to the core emulsion, then add 80 parts of acrylonitrile and 80 parts of 4-acryloyloxy-2,2,6,6 at a temperature of 78°C and a stirring speed of 150 rpm. -The mixture of tetramethylpiperidine is added dropwise within 4 hours, and the reaction is continued for 2 hours to obtain the polymer emulsion of the core-shell structure hindered amine light stabilizer; the polymer emulsion is cooled to room temperature, and then the volume of the polymer emulsion 3 times the mass concentration of 8% CaCl 2 Aqueous solution is demulsified, precipi...

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Abstract

The invention discloses a hindered amine light stabilizer with a toughening effect. The hindered amine light stabilizer consists of a rubbery soft core of which the glass-transition temperature is less than or equal to 0 DEG C and a glassy hard shell which is wrapped outside the rubbery soft core of which the glass-transition temperature is more than or equal to 60 DEG C, and the initial thermal decomposition temperature of the hindered amine light stabilizer is more than or equal to 240 DEG C; and on the basis of weight part of the hindered amine light stabilizer, the rubbery soft core is prepared from 100 parts of first monomer and 1 to 5 parts of cross-linking agent through emulsion polymerization, and the glassy hard shell is prepared from 40 to 80 parts of second monomer and 40 to 80 parts of polymerization hindered amine through the emulsion polymerization. The invention also discloses a preparation method for the hindered amine light stabilizer. According to the method, the hindered amine light stabilizer is introduced into shell layers of elastomer particles with core-shell structures to realize the high molecular weight of the hindered amine light stabilizer in a new mode, so that a light stabilizing effect is permanent, continuous and effective; and the rubbery soft core wrapped in the hindered amine light stabilizer also can provide the toughening effect for polymer substrates to achieve an effect of killing two birds with one stone, so that a new dual-function modifier is provided for the field of the modification of the polymer substrates.

Description

Technical field [0001] The invention belongs to the technical field of light stabilizers and their preparation, and specifically relates to a hindered amine light stabilizer with toughening effect and a preparation method thereof. Background technique [0002] After solar radiation is filtered by the atmosphere, only light with a wavelength of 290-3000nm reaches the surface, and ultraviolet light with a wavelength of 290-400nm is the energy source that causes the photolysis and photooxidation of the polymer. The polymer materials used outdoors will undergo photodegradation due to long-term exposure to light, heat, and oxygen, resulting in discoloration, surface cracks, hardening, and degradation of mechanical properties, which will seriously affect the life of polymer products used outdoors. Therefore, it needs anti-aging treatment. [0003] Adding light stabilizers to polymers is the main method to improve the aging resistance of materials. Commonly used light stabilizers includ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F220/14C08F220/34C08F212/08C08F220/48C08F2/26C08L33/08
Inventor 任显诚游斌周道军
Owner SICHUAN UNIV
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