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Polyvinyl chloride transparent toughening modifier and preparation method thereof

A technology of toughening modifier and polyvinyl chloride, applied in the field of transparent toughening modifier of polyvinyl chloride and its preparation, can solve the problem that the impact strength of polyvinyl chloride is not significantly improved, the composition and structural characteristics are not described, etc. question

Inactive Publication Date: 2014-08-13
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method does not describe that based on changing the composition and structural characteristics of the core-shell modifier, the impact strength of the modified PVC has not been significantly improved.

Method used

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  • Polyvinyl chloride transparent toughening modifier and preparation method thereof

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preparation example Construction

[0018] The present invention at first provides a kind of preparation method of polyvinyl chloride transparent toughening modifier, comprises the following steps:

[0019] Step 1: In parts by weight, add 0-50 parts by weight of styrene, 50-100 parts by weight of butadiene, 0.1-1 parts by weight of initiator, 2-10 parts by weight of emulsifier and 100-300 parts by weight of Parts by weight of deionized water, under the protection of nitrogen, polymerize at 50-85°C for 12-24 hours to obtain poly(styrene-butadiene) (SBR) or polybutadiene (PB) seed emulsion;

[0020] Step 2: In parts by weight, add 40-90 parts by weight of poly(styrene-butadiene) (SBR) or polybutadiene (PB) seed emulsion, 5-60 parts by weight Parts of butyl acrylate, 5-55 parts by weight of styrene, 0.1-1 parts by weight of initiator, 2-10 parts by weight of emulsifier and 80-300 parts by weight of deionized water, under the protection of nitrogen, polymerize at 50-85 °C After reacting for 2-6 hours, add 0.5-2 par...

Embodiment 1

[0028] In a high-pressure reactor equipped with a stirrer and a condensing device, pass nitrogen protection, keep a constant temperature of 65°C, add 100 parts of deionized water, 2 parts of disproportionated potassium abietate, 100 parts of butadiene monomer, and 0.1 part of potassium persulfate , stirred and polymerized for 22 hours, the conversion rate was 98%, and PB seed emulsion was obtained;

[0029] After the above reaction is completed, add 40 parts of PB seed emulsion to the reactor, raise the temperature to 70°C, add 0.05 parts of potassium persulfate initiator, 2 parts of disproportionated potassium abietate, and add St and BA mixed monomers at a constant rate within 2 hours. 5 parts of St monomer, 5 parts of BA monomer, add 0.05 parts of potassium persulfate after the dropwise addition, continue the reaction for 5 hours, add 1 part of phenolic antioxidant, condense after 0.5 hours, wash and dry to obtain transparent polyvinyl chloride toughening modifier.

[0030...

Embodiment 2

[0032] In a high-pressure reactor equipped with a stirrer and a condensing device, nitrogen protection is introduced, and the temperature is kept at 85°C. Add 300 parts of deionized water, 10 parts of potassium oleate, 50 parts of styrene monomer, and 50 parts of butadiene monomer. , 1 part of potassium persulfate, stirred and polymerized for 12 hours, the conversion rate was 98%, and the SBR seed emulsion was obtained;

[0033] After the above reaction is completed, add 90 parts of SBR seed emulsion into the reactor, raise the temperature to 85°C, add 0.5 parts of potassium persulfate initiator, 10 parts of potassium oleate, add St and BA mixed monomers at a constant rate within 2 hours, St 55 parts of monomers, 60 parts of BA monomers, add 0.5 parts of potassium persulfate after the dropwise addition, continue the reaction for 2 hours, add 0.5 parts of phenolic antioxidants, condense after 0.5 hours, wash and dry to obtain transparent polyvinyl chloride. toughness modifier. ...

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Abstract

The invention provides a polyvinyl chloride transparent toughening modifier and a preparation method thereof, and belongs to the field of high polymer materials. The method comprises the following steps: firstly, synthesizing to obtain an SBR (Styrene Butadiene Rubber) or PB (polybutylene) seed emulsion by an emulsion polymerization method, and then grafting butyl acrylate and styrene on the SBR or PB seed emulsion by the emulsion polymerization method, so as to obtain the polyvinyl chloride transparent toughening modifier with a three-layer core-shell structure. Compared with the prior art, the polyvinyl chloride transparent toughening modifier is simple in preparation method and low in cost. The experiment result proves that the impact strength of the modified polyvinyl chloride can be up to 1200J / m, a spline is in ductile fracture, the impact strength of the modified polyvinyl chloride is improved by over 20 times in comparison with that of a pure polyvinyl chloride material, and meanwhile, good transparency of a blend can be ensured.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a polyvinyl chloride transparent toughening modifier and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is widely used in various fields due to its excellent rigidity, corrosion resistance, electrical insulation and other comprehensive properties and low price, and its output occupies the second place among polymer materials. Its disadvantages are poor impact resistance, brittle quality, poor thermal stability and processability. In order to overcome these shortcomings and expand the commercial use of PVC, the research on the modification of polyvinyl chloride has been carried out for decades, and remarkable results have been achieved. It has really made polyvinyl chloride a more general-purpose plastic, which has been used in industry, Construction, civil and other fields have played an important role. [0003] The impact modif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F279/02C08F220/16C08F212/08C08F291/02C08L51/04C08L27/06
Inventor 周超武舒婷陈明张会轩
Owner CHANGCHUN UNIV OF TECH