Method of making alternating copolymers of isobutylene type monomers

A technology of copolymer and monomer composition, applied in the direction of coating, etc., can solve the problems of coating discoloration, undesired performance, poor stability, etc.

Inactive Publication Date: 2008-02-13
PPG IND OHIO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First, some Lewis acids and transition metals are toxic and would have adverse environmental effects if they were leached out of the copolymer and into the environment
Second, in coating applications, Lewis acids and transition metals can cause poor stability or simply discoloration of the coating when the coating is exposed to UV light
Additionally, Lewis acids and transition metals can react with other ingredients in the coating formulation, resulting in undesired properties

Method used

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  • Method of making alternating copolymers of isobutylene type monomers
  • Method of making alternating copolymers of isobutylene type monomers
  • Method of making alternating copolymers of isobutylene type monomers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-A

[0127] Synthesis of alternating copolymer diisobutylene / methyl methacrylate-alternating-hydroxypropyl acrylate / butyl acrylate. Polymerization was carried out using the ingredients in Table 4 below.

[0128] Table 4

[0129] Element

[0130]Feedstock 1 was added to a 4 liter stirred stainless steel pressure reactor. The reactor was then pressurized with nitrogen to provide a 5 psig blanket over the reactor. The stirring on the reactor was 500 rpm and the reactor temperature was adjusted to 125°C. Feedstock 2 was added to the reactor at a rate of 9.62 grams / hour over a period of 3.5 hours. Fifteen minutes after starting feed 2, feed 3 was added to the reactor at an addition rate of 262.10 g / hr over a period of 3 hours. During the monomer addition, the temperature was maintained at 125°C, 40 PSI. After the addition of starting material 2 and starting material 3 was complete, the reaction mixture was allowed to stand for 2 hours. The reactor was then cooled to 2...

Embodiment 1-B

[0132] Synthesis of alternating copolymer diisobutylene-alternating-hydroxypropyl acrylate / butyl acrylate. Polymerization was carried out in isopropanol solvent using the ingredients in Table 5 below.

[0133] table 5

[0134] Element

[0135] Feedstock 1 was added to a 4 liter stirred stainless steel pressure reactor. The reactor was pressurized with nitrogen to provide a 5 psig blanket over the reactor. The stirring on the reactor was set to 500 rpm and the reactor temperature was adjusted to 150°C. Feedstock 2 was added to the reactor at an addition rate of 48 grams / hour over a period of 2.5 hours. After 15 minutes, feedstock 3 was added to the reactor at an addition rate of 250 grams / hour over a period of 2 hours. During the monomer addition, the temperature was maintained at 150°C and 100 PSI. After feedstock 2 and feedstock 3 were added to the reactor, the reaction mixture was left for 2 hours. The reactor was then cooled to 25°C and vented. GC analys...

Embodiment 1-C

[0137] Synthesis of alternating copolymer diisobutylene-alternating-hydroxyethyl acrylate / butyl acrylate. Polymerization was carried out in isopropanol solvent using the ingredients in Table 6 below.

[0138] Table 6

[0139] Element

[0140] Feedstock 1 was added to a 4 liter stirred stainless steel pressure reactor. The reactor was then pressurized with nitrogen to provide a 5 psig blanket over the reactor. The stirring on the reactor was set to 500 rpm and the reactor temperature was adjusted to 150°C. Feedstock 2 was added to the reactor at an addition rate of 48 grams / hour over a period of 2.5 hours. After 15 minutes, feedstock 3 was added to the reactor at an addition rate of 250 grams / hour over a period of 2 hours. During the monomer addition, the temperature was maintained at 150°C and 100 PSI. After feedstock 2 and feedstock 3 were added to the reactor, the reaction mixture was left for 2 hours. The reactor was then cooled to 25°C and vented. GC an...

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Abstract

A method of making a copolymer composition containing a copolymer, which includes the steps of (a) providing a donor monomer composition that includes an isobutylene type monomer; (b) mixing the donor monomer composition with an ethylenically unsaturated monomer composition that includes one or more ethylenically unsaturated acceptor monomers, and is substantially free of maleate type monomers and fumarate type monomers, and (c) polymerizing the mixture resulting from step (b) in the presence of a free radical polymerization initiator. The polymerization is carried out in the substantial absence of Lewis acids and / or transition metals. The isobutylene type monomer is present at a molar excess of at least 10 mol % based on the molar concentration of monomers in the ethylenically unsaturated monomer composition. The ethylenically unsaturated acceptor monomers are present in an amount of at least 15 mol % of the total monomer composition.

Description

technical field [0001] The present invention generally relates to methods of making copolymers of vinyl monomers. More particularly, the present invention relates to a process for the production of copolymers containing isobutylene-type monomers. Background technique [0002] It is often observed that monomers that do not readily homopolymerize are capable of rapid copolymerization with each other. The most typical case occurs when strong electron-donating monomers are mixed with strong electron-accepting monomers, from which regular alternating copolymers are produced after radical initiation. Maleic anhydride is a widely used example of a strong electron accepting monomer. Styrene and vinyl ether are typical examples of electron donating monomers. Systems, such as maleic anhydride-styrene, are known to form charge transfer complexes that tend to place monomers in alternating sequences prior to initiation. Ordered monomers are "tied" together using free radical initiato...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/12C08F210/00C08F220/00C08L23/22C08L33/04C09D123/22
CPCC08F220/12C08L23/22C08F210/00C09D123/22
Inventor S·科卡E·R·科尔里奇G·J·科勒姆J·B·奥德怀尔J·E·普尔V·A·特雷特尔
Owner PPG IND OHIO INC
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