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Pre-modified PVC (Polyvinyl Chloride) resin and modified PVC (Polyvinyl Chloride) resin as well as preparation method thereof and application thereof

A PVC resin and modification technology, applied in the polymer field, can solve the problems of poor mixing of PVC powder and modified materials, etc.

Inactive Publication Date: 2012-03-28
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to overcome the poor mixing of PVC powder and modified material in the prior art when directly using PVC powder for chemical modification or molding processing, and the chemical modification due to the internal The tightness of the structure makes it difficult for the compound molecules participating in the modification to enter the interior of the particles to participate in the chemical modification and other defects, and a pre-modification method of PVC resin and the pre-modification PVC resin obtained by the method and its use are provided. The present invention Also provided is the modified PVC resin prepared by the pre-modified PVC resin and its preparation method

Method used

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  • Pre-modified PVC (Polyvinyl Chloride) resin and modified PVC (Polyvinyl Chloride) resin as well as preparation method thereof and application thereof
  • Pre-modified PVC (Polyvinyl Chloride) resin and modified PVC (Polyvinyl Chloride) resin as well as preparation method thereof and application thereof
  • Pre-modified PVC (Polyvinyl Chloride) resin and modified PVC (Polyvinyl Chloride) resin as well as preparation method thereof and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 4

[0055] Record in embodiment 4: 2.65kg of n-butane, 0.015kg of n-butanone, 0.02kg of n-butanol and 0.015kg of HFC-125. Therefore, n-butane accounts for 98.15% of the total amount of structural modifiers, n-butanone accounts for 0.555%, n-butanol accounts for 0.74%, and HFC-125 accounts for 0.555%.

[0056] Table 1 One or more structural modifiers participate in the implementation table of PVC powder structure modification

[0057]

[0058]

[0059]

[0060] Explanation: In Table 1, the state of each compound at normal temperature and pressure is expressed as: "L" is liquid, "G" is gas, and "S" is solid.

[0061] Table 2

[0062]

[0063]

[0064] Table 3 Structure Modifier Content Component Table

[0065]

[0066]

Embodiment 1

[0068] Put 1.35kg of PVC resin powder into the reaction kettle, add 25.65g of the required auxiliary agent tetradecyl hydroxypropyl phosphate betaine according to the first group formula in Table 1, seal the reaction kettle, stir and raise the temperature to 60°C Finally, 1.013kg of methane was introduced, and the modification was continued for 17 hours under this stable condition. After the modification, the valve was opened to discharge and evaporate within about 30 seconds, and then the pre-modified PVC resin powder was taken out from the kettle.

Embodiment 2

[0070] Put 1.35kg of PVC resin powder into the reaction kettle, add 54g of the required auxiliary agent tetrapropylammonium bromide according to the second group formula in Table 1, seal the reaction kettle, stir and raise the temperature to 45°C and keep the temperature constant, then pass in 2.05kg of ethane and 0.11kg of n-pentanone, and continue to modify under this stable condition for 15 hours. After the modification, open the valve to discharge and volatilize in about 60s, and then open the kettle to take out the pre-modified PVC resin powder .

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Abstract

The invention discloses a method for modifying a PVC (Polyvinyl Chloride) resin in advance, which comprises the following steps of: mixing PVC (Polyvinyl Chloride) resin powder or granules with a structural modifying agent and an addition agent under a stirring condition, and reacting for 0.1-72 hours in the temperature of 5-120 DEG C, wherein the structural modifying agent is selected from alkane with 1-6 atomic carbons, halogenated methane, halogenated ethane, halogenated propane, carbon dioxide, dimethyl ether, aliphatic alcohol with 1-4 atomic carbons and ketone with 3-5 atomic carbons; the addition agent is selected from fatty acid salt, alkyl group sulfate, alkyl sulfonate, alkylbenzene sulfonate, tetra alkyl halogenated ammonium, tetra alkyl ammonium hydroxide, a betaine ampholyticactive agent and a segmented copolymer of epoxy ethane and propylene oxide. The invention also discloses modified PVC (Polyvinyl Chloride) obtained by using the method, the application of PVC (Polyvinyl Chloride), a method for preparing modified PVC (Polyvinyl Chloride) by using the modified PVC (Polyvinyl Chloride) and the modified PVC (Polyvinyl Chloride) obtained therefrom. According to the invention, a aggregative state structure of a macromolecule chain inside the PVC (Polyvinyl Chloride) powder is changed by adopting a specific method so that the PVC (Polyvinyl Chloride) powder can be conveniently used for subsequent chemical modification or subsequent molding processing.

Description

technical field [0001] The present invention relates to the field of macromolecules, in particular to a pre-modified PVC resin and a pre-modified method of PVC resin and its application, and the present invention also relates to a modified PVC resin obtained from the pre-modified PVC resin and its its preparation method. Background technique [0002] PVC (polyvinyl chloride) is one of the five general-purpose polymer resins, and its consumption ranks second only to polyethylene. Its application fields are wide: (1) General soft products, such as hoses, cables, wires, shoes, toys, auto parts, etc. (2) PVC films, such as packaging bags, raincoats, tablecloths, curtains, inflatable toys, etc.; wide transparent films can be used for greenhouses, plastic greenhouses and mulch films; biaxially stretched films, due to their thermal shrinkage characteristics, Can be used for shrink wrap, etc. (3) PVC coated products, such as suitcases, purses and book covers, sofa and car cushion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12C08J7/14C08L27/06C08L27/24C08L27/22C08K13/06C08K9/06C08K5/098C08K3/30C08K5/12C08K3/26
Inventor 曹贵平李雪坤王楠
Owner EAST CHINA UNIV OF SCI & TECH
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