GB1365998A - Polymerization process - Google Patents

Polymerization process

Info

Publication number
GB1365998A
GB1365998A GB2505572A GB2505572A GB1365998A GB 1365998 A GB1365998 A GB 1365998A GB 2505572 A GB2505572 A GB 2505572A GB 2505572 A GB2505572 A GB 2505572A GB 1365998 A GB1365998 A GB 1365998A
Authority
GB
United Kingdom
Prior art keywords
vinyl bromide
polymerization
emulsion containing
reducing agent
bromide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2505572A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ethyl Corp
Original Assignee
Ethyl Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ethyl Corp filed Critical Ethyl Corp
Publication of GB1365998A publication Critical patent/GB1365998A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F214/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen
    • C08F214/16—Monomers containing bromine or iodine

Abstract

1365998 Polymerization of vinyl bromide ETHYL CORP 26 May 1972 [27 May 1971] 25055/72 Heading C3P Polyvinyl bromide is prepared by polymerization of vinyl bromide in aqueous emulsion containing water and vinyl bromide in a ratio of 0À5 : 1 to 5 : 1 using a water-soluble peroxidic compound and a water soluble reducing agent which are brought into contact with each other at a controlled rate such the rate of free radical generation is equal to that obtained by adding from 2À8 x 10<SP>-4</SP> to 8À7 x 10<SP>-4</SP> weight unit equivalents of sodium sulphite per 100 weight units of vinyl bromide to an emulsion containing 1À5 Î 10<SP>-3</SP> to 4À6 Î 10<SP>-3</SP> weight unit equivalents of ammonium persulphate per 100 weight units of vinyl bromide at 50‹ C. in the presence of 7 ppm. monomer of cupric sulphate. The polymerization is carried out either by adding an aqueous solution of the reducing agent to a vinyl bromide emulsion containing the peroxidic compound or vice versa. In examples ammonium persulphate and sodium sulphite were used as the peroxidic compound and reducing agent respectively in the presence of copper sulphate. The polymerization medium also included sodium dodecylbenzene sulphonate as emulsifying agent, sodium dihydrogen phosphate and disodium hydrogen phosphate buffers and a silicone anti-foaming agent. The polymers produced by this process are thermally stable.
GB2505572A 1971-05-27 1972-05-26 Polymerization process Expired GB1365998A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US14762071A 1971-05-27 1971-05-27

Publications (1)

Publication Number Publication Date
GB1365998A true GB1365998A (en) 1974-09-04

Family

ID=22522261

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2505572A Expired GB1365998A (en) 1971-05-27 1972-05-26 Polymerization process

Country Status (5)

Country Link
JP (1) JPS5014271B1 (en)
CA (1) CA981830A (en)
DE (1) DE2224938C3 (en)
FR (1) FR2139033A1 (en)
GB (1) GB1365998A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5334285U (en) * 1976-08-31 1978-03-25
JPS6056082U (en) * 1983-09-26 1985-04-19 日本ピラ−工業株式会社 screen display device

Also Published As

Publication number Publication date
DE2224938A1 (en) 1973-01-04
DE2224938B2 (en) 1978-09-07
JPS5014271B1 (en) 1975-05-26
FR2139033A1 (en) 1973-01-05
CA981830A (en) 1976-01-13
DE2224938C3 (en) 1979-05-03

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee