EP0064259A1
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EP
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Process for polymerization of vinyl monomers with improved kinetic rate profile
Assignee: Goodrich Corp
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Filing: 1982-04-27
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Granted: —
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Expires: 2002-04-27
Abstract
Abstract This invention relates to the use of an organic compound which is a polymerization inhibitor in aqueous suspension polymerization systems for making polymers from olefinic monomers. The inhibitor is added to the aqueous medium prior to the start of or during the reaction. Its use allows a wide range of control throughout the increased reaction rate region and substantially reduces the tailpeak encountered during the aqueous suspension polymerization of olefinic monomers. One example of a suitable inhibitor is 2,2'-methylene bis (4,6-di-tertiary butylphenol).
Inventors
- 👤 Keith Leslie Gardner
- 👤 Richard Augustus Jones
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 19:54
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/38; C08F2/42; C08F14/00; C08F14/02; C08F14/04; C08F14/06; C08F2/12; C08F2/16; C08F2/18
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
136 words
In the process of aqueous suspension homopolymerization and copolymerization of vinyl monomer(s) in the presence of a polymerization initiator and a dispersant and at a temperature in the range of about 0°C. to about 10.0°C., the improvement which comprises adding to the aqueous suspension of vinyl monomer(s) prior to or during the polymerization thereof from about 0.001 part to about 0.01 part by weight, based on the weight of the monomer(s), of a polymerization inhibitor selected from the group consisting of (a) compounds having the general structure wherein R is a straight chain or branched alkylidene group containing from 1 to 5 carbon atoms, and (b) compounds having the general structure wherein R' is H or an alkyl group containing from 1 to 15 carbon atoms, whereby the tailpeak of the polymerization reaction is substantially reduced.
Claim 2
Dependent Claim
136 words
In the process of aqueous suspension homopolymerization and copolymerization of vinyl monomer(s) in the presence of a polymerization initiator and a dispersant and at a temperature in the range of about 0°C. to about 10.0°C., the improvement which comprises adding to the aqueous suspension of vinyl monomer(s) prior to or during the polymerization thereof from about 0.001 part to about 0.01 part by weight, based on the weight of the monomer(s), of a polymerization inhibitor selected from the group consisting of (a) compounds having the general structure wherein R is a straight chain or branched alkylidene group containing from 1 to 5 carbon atoms, and (b) compounds having the general structure wherein R' is H or an alkyl group containing from 1 to 15 carbon atoms, whereby the tailpeak of the polymerization reaction is substantially reduced.
Claim 3
Dependent Claim
13 words
The process as defined in claim 1 wherein the monomer is vinyl chloride.
Claim 4
Dependent Claim
15 words
The process as defined in claim 1 wherein the inhibitor is 2,2'-methylene bis (4,6-di-tertiary butylphenol).
Claim 5
Dependent Claim
16 words
The process as defined in claim 1 wherein the inhibitor is 2,2'-ethylidene bis (4,6-di-tertiary butylphenol) .
Claim 6
Dependent Claim
15 words
The process as defined in claim 1 wherein the inhibitor is 3-(3',5'-ditertiarylbutyl-4'-hydroxy phenyl) propionic acid.
Claim 7
Dependent Claim
15 words
The process as defined in claim 1 wherein the inhibitor is ethyl 3-(3',5'-ditertiarybutyl-4-hydroxy phenyl) propionate.
Claim 8
Dependent Claim
15 words
The process as defined in claim 2 wherein the inhibitor is 2,2'-methylene bis (4,6-di-tertiary butylphenol).
Claim 9
Dependent Claim
15 words
The process as defined in claim 2 wherin the inhibitor is 2,2'-ethylidene bis (4,6-di-tertiary butylphenol).
Claim 10
Dependent Claim
14 words
The process as defined in claim 2 wherein the inhibitor is 3-(3',5'-ditertiarylbutyl-4'-hydroxy phenyl)propionic acid.
Claim 11
Dependent Claim
15 words
The process as defined in claim 2 wherein the inhibitor is ethyl 3-(3',5'-ditertiarybutyl-4-hydroxy phenyl) propionate.
References Cited (Backward Citations)
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