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

Radical polymerization processes for preparing halogenated polymers, and halogenated polymers

A polymerization process and polymer technology, which are applied in the free radical polymerization preparation process of halogenated polymers and the field of halogenated polymers, can solve the problems of high cost and increased cost and price of halogenated polymers.

Inactive Publication Date: 2009-12-09
SOLVAY SA
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polydispersity index and M of halogenated polymers synthesized by this process z / M w The ratios, although lower than those for halogenated polymers prepared by conventional processes, are still high (e.g. polydispersity index for vinyl chloride homopolymers greater than or equal to 1.70), suggesting that the process is affected by those Strong influence of side reactions such as transfer and / or disproportionation and / or recombination reactions that interrupt or terminate polymer chain growth
Another disadvantage of this prior art process is the need to use an iodo organic transfer agent which is generally expensive and adds to the cost price of the halogenated polymer

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Radical polymerization processes for preparing halogenated polymers, and halogenated polymers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0142] Embodiment 1 (according to the present invention)

[0143] 2000g demineralized water, 6g poly(vinyl alcohol) (dispersant), 1.5g molecular iodine and 1.5g diethyl peroxydicarbonate (free radical generator) were first introduced into a 3.5L jacketed reactor equipped with agitator middle. The reactor was closed and stirring was started. Vacuum was drawn inside the reactor.

[0144] 1000 g of vinyl chloride were introduced into the reactor.

[0145] The reactor contents were heated to 60°C. The moment when the temperature of the reactor contents reaches 60°C is called t 0 . Allow the reaction to happen.

[0146] at t 0 At +3h 30, the reaction was stopped by cooling the reactor contents (slurry) to room temperature as quickly as possible.

[0147] Unconverted vinyl chloride was removed from the slurry. The water is then removed by filtration and fluidized bed drying. Thus, poly(vinyl chloride) powder was obtained. The fraction of vinyl chloride that has reacted (...

Embodiment 2

[0154] Embodiment 2 (according to the present invention)

[0155] Prepare as in Example 1, the difference is that the reaction is at t 0 +4h (instead of t 0 +3h30) stop.

Embodiment 3

[0156] Embodiment 3 (according to the present invention)

[0157] Prepare as in Example 1, the difference is that the reaction is at t 0 +5h (instead of t 0 +3h30) stop.

[0158] The results of each measurement of Examples 1-3 are listed in Table 1.

[0159] Table 1

[0160] Example

[0161] n.m. = not determined

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
polydispersity indexaaaaaaaaaa
polydispersity indexaaaaaaaaaa
polydispersity indexaaaaaaaaaa
Login to View More

Abstract

The invention concerns a radical polymerization method for preparing halogenated polymers, using one or more ethylenically unsaturated monomers whereof at least one is selected among halogenated monomers, molecular iodine and one or more radical generating agents selected among diazo-compounds, peroxides and dialkyldiphenylalkanes. The invention also concerns a method for radical polymerization, starting with halogenated polymers prepared by the above method, of block copolymers whereof at least one block is a halogenated polymer block. The invention further concerns halogenated polymers having a number average molecular weight Mn greater than 1.0.10 and a Mz / Mw ratio less than 1.65. The invention also concerns block copolymers whereof at least one is a halogenated polymer block identical to said halogenated polymers above. Finally, the invention concerns block copolymers comprising at least one halogenated polymer block having a number average molecular weight Mn greater than 1.5.10 and polydispersity index Mw / Mn less than 1.60.

Description

[0001] The application date is May 16, 2003 (the international application number is PCT / EP03 / 05314), the application number for entering the national stage is 03816701.8, and the invention name is "free radical polymerization preparation process of halogenated polymer and halogenated A divisional application of the application for "Polymer". technical field [0002] This invention relates to free radical polymerization processes for the preparation of halogenated polymers and to such polymers. The polymerization process which is the subject of the present invention is particularly suitable for the preparation of this polymer. Background technique [0003] Halogenated polymers are generally prepared by "conventional" free radical polymerization procedures involving halogenated monomers and a free radical generator capable of initiating polymer chain growth. According to this process, the time required for the polymer chain to grow until it reaches its final size is very sho...

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 Applications(China)
IPC IPC(8): C08F214/08C08F114/06C08F214/22C08F293/00C08F2/00C08F2/38C08F4/40C08F8/22C08F14/00C08F14/08C08F14/16C08F14/22
CPCC08L53/00C08F214/186C08F8/22C08F293/005C08F14/00C08F214/18C08F293/00C08L2666/02C08L2666/24
Inventor P·拉克鲁瓦-德斯马泽斯R·塞维拉克B·布特文V·博达特V·库罗夫斯基
Owner SOLVAY SA