DE738428C - Process for the polymerization of isobutylene - Google Patents

Process for the polymerization of isobutylene

Info

Publication number
DE738428C
DE738428C DEI70754D DEI0070754D DE738428C DE 738428 C DE738428 C DE 738428C DE I70754 D DEI70754 D DE I70754D DE I0070754 D DEI0070754 D DE I0070754D DE 738428 C DE738428 C DE 738428C
Authority
DE
Germany
Prior art keywords
polymerization
isobutylene
caproic acid
time
reac
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
DEI70754D
Other languages
German (de)
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie 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
Application filed by IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEI70754D priority Critical patent/DE738428C/en
Application granted granted Critical
Publication of DE738428C publication Critical patent/DE738428C/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
    • C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F210/04—Monomers containing three or four carbon atoms
    • C08F210/08—Butenes
    • C08F210/10—Isobutene
    • C08F210/12—Isobutene with conjugated diolefins, e.g. butyl rubber

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Description

Verfahren zur Polymerisation von Isohutylen Im Patent 704 038 ist gezeigt, @daß die Polymerisation von Isobatylen seit Hilfe von Katalysatoren der Friedel-Crafts'schen Reaktion, vorzugsweise Borfluorid, bei Temperaturen unterhalb -io° besonders günstig verläuft, wenn man in Gegenwart geringer Mengen einwertiger Alkohole arbeitet. Diese Zusatzstoffe wirken als Beschleuniger der Reaktion, ida bei ihrer Anwesenheit die Reaktionszeit erheblich verkürzt und die Menge des zur Polymerisation benötigten Katalysators herabgesetzt wird. Gleichzeitig -wird dabei in der Regel :das Molekulargewicht der P.olymerisate unter sonst gleichen Bedingungen wesentlich erhöht.Process for the polymerization of isohutylene in patent 704,038 shown @ that the polymerization of isobatylene since the help of catalysts of the Friedel-Crafts reaction, preferably boron fluoride, at temperatures below -io ° is particularly favorable if one is monovalent in the presence of small amounts Alcohols works. These additives act as accelerators of the reaction, ida when they are present, the response time is significantly reduced and the amount of the to Polymerization required catalyst is reduced. At the same time - will be there As a rule: the molecular weight of the polymerizate under otherwise identical conditions significantly increased.

Es wurde nun gefunden, daß idiese günstige Wirkung auf den Verlauf oder Polymerisation nicht auf die einnvertigen Alkohole beschränkt ist, sondern !daß man ähnliche Ergebnisse auch mit geringen Mengen Capronsäure erhält. In der Regel werden Mengen, von o,5 °1o nicht überschritten, doch genügt vielfach auch schon wesentlich weniger. Durch den genannten Zusatz wird ,die Reaktionszeit-erheblich verkürzt und .die notwendige Katalysatormenge herabgesetzt. Gleichzeitig tritt in manchen Fällen eine Steigerung ;des Molekulargewichts der erhaltenen Produkte ein.It has now been found that I have this beneficial effect on the course or polymerization is not limited to the mono-inert alcohols, but ! That one obtains similar results with small amounts of caproic acid. In the As a rule, quantities of 0.5% are not exceeded, but in many cases it is also sufficient much less. As a result of the addition mentioned, the response time is considerable shortened and .the necessary amount of catalyst reduced. At the same time occurs in in some cases an increase in the molecular weight of the products obtained.

Beispiel Man gewinnt reines Isbbutylen, indem man aus einem von io5 bis io9° sJeden(den I.sobutylalkohol Wasser abspaltet und das erhaltene Isobutylen nöchmals destilliert. 2o Raumteile des so gewonnenen flüssigen Iso-5utylens werden mit 4o bis 6o Raumteilen flüssigem Äthylen gemischt und bei einer Temperatur von -13o° mittels der nachstehend angegebenen Mengen Borfluorid unter Zusatz der ebenfalls angegebenen Mengen Capronsäure polymerisiert. Die erhaltenen Reaktionszeiten und Molekulargewichte .der Polymerisate sind in der nachstehenden Tabelle zusammengestellt. o°/0 O@oI°/o - 0#03°/0 005°%0 0,i°/0 Raum- Capronsäure Capronsäure Capronsäure Capronsäure Capronsäure teile - - gas- Reak- Reak- Reak- Real,- Reak- förmiges tions- tions- tions- Bons- tions- 13orflu- Mol. Mol. 1V101. . Mo 1. 141o1. zeit in zeit in z eit in zeit in zeit in orid Gewicht Sekun- Gewicht Sekun- Gewicht Sekun- Gewicht Sekun- Gewicht Sekun- den den den den den 20 245 000 75 268000 150 258000 70 --55000 6o 238 ooo 1 go 40 233000 40 262 ooo 6o 258 ooo 60 2470001 30 216 000 30 80 210000 25 243000 40 233 000 25 2,30000 20 210000 20 120 180 00o 16 235000 29 226 000 20 228 o00 18 255000 ( 11 160 178 000 I1 220000 18 215000 13 2i6.000 12 240000 I 7 Example Pure isobutylene is obtained by splitting off the isobutyl alcohol water from one of 10 5 to 10 9 ° s each and distilling the isobutylene again The reaction times and molecular weights of the polymers obtained are summarized in the table below. o ° / 0 O @ oI ° / o - 0 # 03 ° / 0 005 °% 0 0, i ° / 0 Space Caproic Acid Caproic Acid Caproic Acid Caproic Acid Caproic Acid parts - - gas- reac- reac- reac- real, - reac- shaped tation tion bons ting 13orflu- Mol. Mol. 1V101. . Mon 1. 141o1. time in time in time in time in time in orid weight sec- weight sec- weight sec- weight sec- weight sec- den den den den 20 245 000 75 268000 150 258000 70 --55000 6o 238 ooo 1 go 40 233000 40 262 ooo 6o 258 ooo 60 2470001 30 216 00 0 30 80 210000 25 243000 40 233 000 25 2.30000 20 210000 20 120 180 00o 16 235000 29 226 000 20 228 o00 18 255000 (11 160 178 000 I1 220,000 18 215,000 13 2i6,000 12 240,000 I 7

Claims (1)

PATENTANSPRUCH: Weiterbildung des Verfahrens nach Patent 704 038, dadurch gekennzeichnet, ,daß hier in Gegenwart geringer Mengen Capronsäure gearbeitet wird.PATENT CLAIM: Further development of the process according to patent 704 038, characterized in that it is carried out in the presence of small amounts of caproic acid.
DEI70754D 1938-05-24 1938-06-24 Process for the polymerization of isobutylene Expired DE738428C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI70754D DE738428C (en) 1938-05-24 1938-06-24 Process for the polymerization of isobutylene

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEL0061446 1938-05-24
DEI70754D DE738428C (en) 1938-05-24 1938-06-24 Process for the polymerization of isobutylene

Publications (1)

Publication Number Publication Date
DE738428C true DE738428C (en) 1943-08-17

Family

ID=33491359

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI70754D Expired DE738428C (en) 1938-05-24 1938-06-24 Process for the polymerization of isobutylene

Country Status (1)

Country Link
DE (1) DE738428C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0195333A2 (en) * 1985-03-15 1986-09-24 BASF Aktiengesellschaft Catalyst system for the cationic polymerization of isobutylene

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0195333A2 (en) * 1985-03-15 1986-09-24 BASF Aktiengesellschaft Catalyst system for the cationic polymerization of isobutylene
EP0195333A3 (en) * 1985-03-15 1990-03-07 Basf Aktiengesellschaft Catalyst system for the cationic polymerization of isobutylene

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