GB1498698A - Process for the manufacture of vinyl chloride polymers - Google Patents

Process for the manufacture of vinyl chloride polymers

Info

Publication number
GB1498698A
GB1498698A GB2612575A GB2612575A GB1498698A GB 1498698 A GB1498698 A GB 1498698A GB 2612575 A GB2612575 A GB 2612575A GB 2612575 A GB2612575 A GB 2612575A GB 1498698 A GB1498698 A GB 1498698A
Authority
GB
United Kingdom
Prior art keywords
vinyl chloride
polymers
manufacture
monomer
weight
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
GB2612575A
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.)
Hoechst AG
Original Assignee
Hoechst AG
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
Priority claimed from DE19742429777 external-priority patent/DE2429777B2/en
Priority claimed from DE19742439203 external-priority patent/DE2439203B2/en
Application filed by Hoechst AG filed Critical Hoechst AG
Publication of GB1498698A publication Critical patent/GB1498698A/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
    • C08F6/00—Post-polymerisation treatments
    • C08F6/14—Treatment of polymer emulsions
    • C08F6/20—Concentration
    • 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
    • C08F6/00—Post-polymerisation treatments
    • C08F6/001—Removal of residual monomers by physical means
    • C08F6/003—Removal of residual monomers by physical means from polymer solutions, suspensions, dispersions or emulsions without recovery of the polymer therefrom

Abstract

Vinyl chloride homo, graft or co polymers comprising at least 80 % by weight of polymerised vinyl chloride are produced by polymerising the monomer(s) in aqueous emulsion or suspension in the presence or absence of polymers. The bulk of unconverted monomer is removed and then the aqueous dispersion of the polymer is subjected to a pressure of from 150 to 650 torr for at least 15 minutes to evaporate off from 0.2 to 20 kg of water per 100 kg of dispersion. This process achieves residual monomer contents of less than 0.005% by weight of vinyl chloride. This reduces any harmful physiological effect of monomeric vinyl chloride in the handling of these polymers.
GB2612575A 1974-06-21 1975-06-19 Process for the manufacture of vinyl chloride polymers Expired GB1498698A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19742429777 DE2429777B2 (en) 1974-06-21 1974-06-21 Process for the removal of non-unsettled, residual vinyl chloride from aqueous dispersions of vinyl chloride polymers
DE19742439203 DE2439203B2 (en) 1974-08-16 1974-08-16 Process for removing unreacted, remaining vinyl chloride from aqueous dispersions of vinyl chloride polymers

Publications (1)

Publication Number Publication Date
GB1498698A true GB1498698A (en) 1978-01-25

Family

ID=25767305

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2612575A Expired GB1498698A (en) 1974-06-21 1975-06-19 Process for the manufacture of vinyl chloride polymers

Country Status (8)

Country Link
AT (1) AT340681B (en)
CH (1) CH617444A5 (en)
ES (1) ES438576A1 (en)
FR (1) FR2275488A1 (en)
GB (1) GB1498698A (en)
IT (1) IT1039140B (en)
NL (1) NL161774C (en)
SE (1) SE407411B (en)

Also Published As

Publication number Publication date
AT340681B (en) 1977-12-27
NL161774C (en) 1980-03-17
IT1039140B (en) 1979-12-10
FR2275488A1 (en) 1976-01-16
CH617444A5 (en) 1980-05-30
SE7507121L (en) 1975-12-22
FR2275488B1 (en) 1978-12-08
SE407411B (en) 1979-03-26
ATA476275A (en) 1977-04-15
NL161774B (en) 1979-10-15
ES438576A1 (en) 1977-05-16
NL7412471A (en) 1975-12-23

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Legal Events

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

Effective date: 19920619