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Transparent polyvinyl chloride toughening modifier with three-layer nuclear shell structure and preparation method thereof

A toughening modifier, polyvinyl chloride technology, applied in the field of three-layer core-shell structure polyvinyl chloride transparent toughening modifier, to achieve good light transmission effect

Active Publication Date: 2009-09-30
深圳市恒得源环保新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no description in conventional MBS modifiers based on changing the structural characteristics of MBS to improve the impact strength of PVC

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: In a 50L high-pressure reactor equipped with a stirrer and a condensing device, nitrogen protection was introduced, and the temperature was kept at 65°C. 18 kg of deionized water, 0.8 kg of abietic acid soap, 2 kg of styrene monomer, and 0.005 potassium persulfate were added. kg, divinylbenzene 0.02kg, add butadiene 14.4kg, potassium persulfate 0.036kg after stirring and polymerizing for 6 hours, and stir and polymerize for 12 hours, the conversion rate is 98%, and polystyrene / polybutadiene composite Emulsion, the particle size is 130nm. After the above reaction is over, add 1.075 kg of potassium persulfate initiator, add 4.3 kg of PMMA monomer at a constant rate within 2 hours, continue the reaction for 1 hour, add an antioxidant, condense after 0.5 hours, wash, and dry to obtain a three-layer core-shell structure polymer. Vinyl chloride transparent toughening modifier.

[0025] Weigh 100 parts of polyvinyl chloride and 2 parts of organotin, respectively ad...

Embodiment 2

[0026] Example 2: In a 50L high-pressure reactor equipped with a stirrer and a condensing device, feed nitrogen protection, keep the temperature at 65°C, add 18kg of deionized water, 0.8kg of rosin acid soap, 2.4kg of styrene monomer, and potassium persulfate 0.006kg, divinylbenzene 0.024kg, add butadiene 14kg, potassium persulfate 0.035kg after stirring and polymerizing for 6 hours, and stir and polymerize for 12 hours, the conversion rate is 98%, and polystyrene / polybutadiene composite Emulsion, the particle size is 130nm. After the above reaction is over, add 1.075 kg of potassium persulfate initiator, add 4.3 kg of PMMA monomer at a constant rate within 2 hours, continue the reaction for 1 hour, add antioxidants, condense after 0.5 hours, wash, and dry to obtain a three-layer core-shell structure PVC transparent toughening modifier. The test method is the same as that of Example 1, and the properties of the three-layer core-shell structure polyvinyl chloride transparent t...

Embodiment 3

[0027] Example 3: In a 50L high-pressure reactor equipped with a stirrer and a condensing device, feed nitrogen protection, keep the temperature at 65°C, add 18kg of deionized water, 0.8kg of rosin acid soap, 2.8kg of styrene monomer, and potassium persulfate 0.007kg, divinylbenzene 0.028kg, add butadiene 13.6kg after 6 hours of stirring polymerization, potassium persulfate 0.034kg, stirring and polymerization for 12 hours, the conversion rate is 98%, and polystyrene / polybutadiene is obtained Composite emulsion with a particle size of 130nm. After the above reaction is over, add 1.075 kg of potassium persulfate initiator, add 4.3 kg of PMMA monomer at a constant rate within 2 hours, continue the reaction for 1 hour, add antioxidants, condense after 0.5 hours, wash, and dry to obtain a three-layer core-shell structure PVC transparent toughening modifier. The test method is the same as that of Example 1, and the properties of the three-layer core-shell structure polyvinyl chlor...

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Abstract

The invention relates to a transparent polyvinyl chloride toughening modifier with a three-layer nuclear shell structure and a preparation method thereof. The modifier has a three-layer structure using polyvinyl chloride as an inner core, polybutadiene as a middle layer and polymethyl methacrylate as an outermost layer. The modifier is prepared by adopting an emulsion graft polymerization method, and then subjected to coagulation and drying post treatment to form an impact modifier with a three-layer nuclear shell structure. The transparent polyvinyl chloride toughening modifier with the three-layer nuclear shell structure synthesized by the method is used for modifying the polyvinyl chloride, and a structure test shows that: when the using amount of the transparent polyvinyl chloride toughening modifier with the three-layer nuclear shell structure is 5 percent of the total weight of the polyvinyl chloride, the impact strength can reach 1,300 J / m; a sample band is in ductile fracture, and the impact strength thereof is improved by more than 20 times compared with a pure polyvinyl chloride material; and simultaneously, good light transmittance of a blend can be ensured.

Description

technical field [0001] The invention relates to a three-layer core-shell structure 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 polyvinyl chloride, research on the modification of polyvinyl chloride has been carried out for decades, and remarkable results have been achieved, making polyvinyl chloride a more general engineering plastic. It has played an important role in the fields of industry, construction, and civil use. [0003] The modifier for impact modification of polyvinyl chlo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F285/00C08F257/02C08F279/02C08L27/06
Inventor 张会轩陈明周超
Owner 深圳市恒得源环保新材料科技有限公司
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