Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of polyvinyl chloride disentanglement mother material with high polymerization degree and ultrahigh polymerization degree

A high degree of polymerization and polyvinyl chloride technology, applied in the field of polyvinyl chloride processing technology, can solve the problems of difficult processing and poor processing fluidity, and achieve the effects of maintaining mechanical and physical properties, improving flow properties, and low cost

Inactive Publication Date: 2005-03-30
NANJING UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is to: provide a kind of method for preparing unentangled high degree of polymerization and ultra-high degree of polymerization polyvinyl chloride, so that high degree of polymerization and ultra-high degree of polymerization polyvinyl chloride have good fluidity during processing, Solve the technical problems of poor processing fluidity and difficult processing of existing high-polymerization and ultra-high-polymerization polyvinyl chloride

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] Example 1, the preparation of disentangled high degree of polymerization and ultra-high degree of polymerization polyvinyl chloride:

[0027] Add 100 grams of high degree of polymerization polyvinyl chloride (1800 degree of polymerization) to 1600-2400 grams of bis(2-ethylhexyl) phthalate to form a 4-6% mixture, at 120-140 Dissolve at ℃ until the system becomes uniform and transparent, and continue to stir for half an hour. Cool naturally to room temperature, wash with 4-8 liters of ethanol or methanol for 2-3 times, then filter and dry to obtain disentangled polyvinyl chloride with a high degree of polymerization. Melt flow rate (MFR) measurement shows that in the case of adding 80 parts of plasticizer (bis(2-ethylhexyl) phthalate) in every 100 parts of high polymerization degree polyvinyl chloride, use this method to prepare The melt flow rate of the high degree of polymerization polyvinyl chloride is 31 times higher than that of untreated high degree of polymerizati...

example 2

[0029] Example 2. Direct use of masterbatch containing polyvinyl chloride with disentangled high degree of polymerization and ultrahigh degree of polymerization and bis(2-ethylhexyl) phthalate

[0030] Make a 4-6wt% solution of high-polymerization polyvinyl chloride (polymerization degree 1800) with bis(2-ethylhexyl) phthalate as a solvent, and dissolve it at 120-140°C until the system is uniform and transparent . Naturally cool to room temperature. With phthalate bis(2-ethylhexyl) ester in the solution as the plasticizer (the amount can be obtained from the concentration) 80 parts, and 100 parts of high degree of polymerization polyvinyl chloride (highly polymerized polyvinyl chloride disentangled in the solution) The amount of high-degree polyvinyl chloride plus untreated high-degree polyvinyl chloride) was used to measure the melt flow rate (MFR). The formulation of 100 parts mixed with 80 parts of bis(2-ethylhexyl) phthalate in the same proportion increased by 20-25 time...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
degree of polymerizationaaaaaaaaaa
degree of polymerizationaaaaaaaaaa
degree of polymerizationaaaaaaaaaa
Login to View More

Abstract

The preparation method of high polymerization degree and ultrahigh polymerization degree polyvinyl chloride disentanglement mother material includes the following steps: dissolving the high polymerization degree of ultrahigh polymerization degree polyvinyl chloride in the mesomolecular solvent di-2-ethylhexyl phthalate (DOP), heating, stirring, dissolving to transparent, naturally cooling to room temp., the solution can be directly used in various formulae or washing solution with ethyl alcohol (or methyl alcohol), filtering and drying so as to obtain the disentangled high polymerization degree or ultrahigh polymerization degree polyvinyl chloride mother material.

Description

1. Technical field [0001] The invention relates to a preparation method of polyvinyl chloride disentanglement masterbatch with a high degree of polymerization and an ultrahigh degree of polymerization, and belongs to the technical field of polyvinyl chloride processing technology. 2. Background technology [0002] Polyvinyl chloride is a general-purpose resin with excellent comprehensive properties and a wide range of uses. Among them, high degree of polymerization polyvinyl chloride refers to polyvinyl chloride with an average degree of polymerization above 1700, and ultra-high degree of polymerization polyvinyl chloride refers to polyvinyl chloride with an average degree of polymerization above 4000. Compared with ordinary soft polyvinyl chloride, high degree of polymerization and ultra-high degree of polymerization polyvinyl chloride have small compression set, good dimensional stability at high temperature, good heat resistance, good hardness stability when changing temp...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/11C08L27/06
Inventor 薛奇周东山王晓亮孙清李亮
Owner NANJING UNIV