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Preparation method of titanium dioxide specially used for PVC calendaring film

A technology of titanium dioxide and calendered film, which is applied in the field of preparation of special titanium dioxide for PVC calendered film, can solve the problems of reducing the ultraviolet shielding performance of materials, poor compatibility of polyvinyl chloride resin, affecting the ultraviolet shielding effect, etc., achieves good visible light transmittance, reduces Aging rate, effect of avoiding agglomeration

Active Publication Date: 2017-11-24
中钛集团焦作市裕盛钛业有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, organic UV shielding agents are small molecules, which have the disadvantages of toxicity, easy oozing and poor stability, and these UV shielding agents have a tendency to gradually precipitate on the surface of the product under high temperature or ultraviolet light irradiation
Inorganic UV shielding agents have disadvantages such as large amount of addition, poor transparency of visible light, poor dispersion effect, and poor compatibility with polyvinyl chloride resin.
[0005] In the prior art, there is a method of using ultrafine titanium dioxide as an ultraviolet shielding agent, such as Chinese patent CN103724957A, which uses ultrafine titanium dioxide to replace the traditional organic ultraviolet shielding agent, and makes a polylactic acid film by blow molding. The particle size of the ultrafine titanium dioxide is distributed in 150-240nm, although ultrafine TiO 2 It has the advantages of high strength and certain ultraviolet shielding performance, but at the same time, due to the high surface energy of ultrafine titanium dioxide particles, it is easy to agglomerate to form secondary particles, which is not conducive to its uniform dispersion in the matrix, thereby reducing the ultraviolet shielding performance of the material
[0006] Chinese patent CN104845301A provides an ultraviolet shielding agent and its preparation method and a polylactic acid film containing the ultraviolet shielding agent and its preparation method. The ultraviolet shielding agent uses nano titanium dioxide as the core material and orthosilicate as the nano The raw material of silicon oxide, coated with nano-silica layer on the surface of nano-titanium dioxide, the prepared ultraviolet shielding agent has good ultraviolet shielding effect and visible light transmission effect at the same time, but the coating effect is poor, and it is used in polyvinyl chloride resin Poor compatibility, which affects the UV shielding effect, not suitable for higher UV environments

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  • Preparation method of titanium dioxide specially used for PVC calendaring film
  • Preparation method of titanium dioxide specially used for PVC calendaring film
  • Preparation method of titanium dioxide specially used for PVC calendaring film

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preparation example Construction

[0036] In one aspect of the present invention, the present invention proposes a kind of preparation method of titanium dioxide special for PVC calendering film, and this method specifically comprises the following steps:

[0037] (1) Fully mix and stir the far-infrared ceramic powder and the surface treatment agent, and carry out surface activation treatment on the inorganic powder;

[0038] (2) After the material after surface activation treatment in step (1) is mixed with water to form a slurry with a solid content of 50% to 60% by weight, add a dispersant, mix well, then add zinc oxide, and continue to stir fully Mix to get dispersion system;

[0039] (3) Add the pulverized and sieved industrial titanium dioxide to the dispersion system of step (2), ultrasonically, magnetically stir, cool to room temperature, suction filter, dry, calcinate, and disperse to obtain a mixed powder;

[0040] (4) Mix the mixed powder in step (3) with water, add an ion complexing agent, then add s...

Embodiment 1

[0072] (1) 5 parts by weight of far-infrared ceramic powder and 0.5 parts by weight of polyacrylate are fully mixed and stirred evenly, and surface treatment is carried out; (2) the material after surface treatment in step (1) is mixed with water to form a solid weight After the slurry with a content of 50%, add 1 part by weight of a dispersant (a compound of maleic acid-acrylic acid copolymer and polyethylene glycol, the weight ratio is 2:1), mix thoroughly at 90°C-110°C, and then add 2 parts by weight of zinc oxide, continue stirring and mixing at 90°C-110°C to obtain a suspension;

[0073] (3) Grind and sieve 40 parts by weight of industrial titanium dioxide, add it to the suspension in step (2), sonicate for 10 minutes, stir for 3 hours, after the reaction, cool to room temperature, suction filter, and dry at 55-75°C for 5 hours , calcined at 800-900°C for 2 hours, then calcined at 400-500°C for 1 hour, and dispersed to obtain a mixed powder, mixed with aminopropyltrimetho...

Embodiment 2

[0077] (1) 4 parts by weight of far-infrared ceramic powder and 0.5 parts by weight of diethanolamine are fully mixed and stirred evenly, and the surface treatment is carried out; (2) the material after surface treatment in step (1) is mixed with water to form a solid weight content After 50% of the slurry, add 0.8 parts by weight of dispersant (maleic acid-acrylic acid copolymer), mix thoroughly at 90°C-110°C, then add 1.5 parts by weight of zinc oxide, and continue to stir fully at 90°C-110°C mixed to obtain a suspension;

[0078] (3) Grinding and sieving 40 parts by weight of industrial titanium dioxide, adding to the suspension in step (2), ultrasonicating for 7 minutes, stirring for 5 hours, after the reaction, cooling to room temperature, suction filtration, and drying at 55-75° C. for 7 hours, Calcined at 800-900°C for 1 hour, then calcined at 400-500°C for 2 hours, dispersed to obtain mixed powder;

[0079] (4) Mix the mixed powder in step (3) with water to form a slu...

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Abstract

The invention provides a preparation method of titanium dioxide specially used for a PVC calendaring film. The preparation method comprises the following steps: preparing mixed powder by adopting a three-phase mixture of far infrared ceramic powder, zinc oxide and titanium dioxide, coating a silicon dioxide layer, and further carrying out organic surface modification so as to obtain modified titanium dioxide. When the modified titanium dioxide prepared by adopting the method provided by the invention is applied to the PVC calendaring film, the addition amount is small, the mechanical properties of the PVC calendaring film can be effectively improved, the prepared titanium dioxide has good compatibility with PVC resin, the anti-ultraviolet capability of the PVC calendaring film is greatly improved, ageing is retarded, the PVC calendaring film is especially applicable to an environment with high-intensity ultraviolet rays, and the heat preservation effect of the calendaring film is also improved.

Description

technical field [0001] The invention belongs to the field of film preparation, and in particular relates to a preparation method of titanium dioxide specially used for PVC calendering films. Background technique [0002] PVC material is a plastic with a wide range of applications, and PVC calendered film also has a wide range of functions. In the north of our country, due to the lack of rain, low temperature and short growing period of crops, the use of plastic greenhouses has become an important measure for the development of agricultural production. Fruits, vegetables and flowers are inseparable from plastic greenhouses. The PVC calendered film occupies an important position in the plastic shed film. In addition, it is widely used in Yantian thatch, industrial packaging, electrical insulation, inflatable film products, light box advertisements, engineering waterproofing, and daily necessities. [0003] Since PVC will produce many irregular chain structures during polymeri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/02C08K13/06C08K9/04C08K9/06C08K3/00C08K3/22C08K5/12C08K5/524C08L27/06
CPCC08J5/18C08J2327/06C08K3/00C08K3/22C08K5/12C08K5/524C08K9/02C08K9/04C08K9/06C08K9/08C08K13/06C08K2003/2241C08K2003/2296C08L2201/08C08L2201/10C08L2203/16C08L27/06
Inventor 徐英杰徐英豪
Owner 中钛集团焦作市裕盛钛业有限公司