GB924453A - Improved lactam polymerisation process - Google Patents

Improved lactam polymerisation process

Info

Publication number
GB924453A
GB924453A GB3152860A GB3152860A GB924453A GB 924453 A GB924453 A GB 924453A GB 3152860 A GB3152860 A GB 3152860A GB 3152860 A GB3152860 A GB 3152860A GB 924453 A GB924453 A GB 924453A
Authority
GB
United Kingdom
Prior art keywords
caprolactam
sodium
phenyl
carbamate
ethyl carbamate
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
GB3152860A
Inventor
Dennis Aubrey Lewis
Percy Arthur Small
Erno Laszlo Zichy
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB3152860A priority Critical patent/GB924453A/en
Publication of GB924453A publication Critical patent/GB924453A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/02Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
    • C08G69/08Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
    • C08G69/14Lactams
    • C08G69/16Preparatory processes
    • C08G69/18Anionic polymerisation
    • C08G69/20Anionic polymerisation characterised by the catalysts used

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polyamides (AREA)

Abstract

In the alkaline polymerization of at least one monomeric lactam having at least six carbon atoms in the ring, the lactam is maintained above its melting point and a compound of the formula <FORM:0924453/IV(a)/1> or a salt thereof is added to the lactam, either as such or dissolved in a suitable solvent, R and R1 being alkyl, alkenyl, aryl, alkaryl, aralkyl or cycloalkyl groups, R and R1 being linked together, if desired, to form a ring with C, Y and X, and Z is either an -NH- radical in which case X and Y can each be O, S or -NH-, or, alternatively, Z is O or S, in which case X can be O or S or -NH- and Y can be O or S. Specified lactams are e -caprolactam, enantholactam, capryllactam, dodecanolactam, a -methyl caprolactam, b -d -dimethyl caprolactam and b -phenyl caprolactam. The reaction is effected in the presence of conventional alkali catalysts. Many co-catalysts of the above formula are specified. In the examples, e -caprolactam is polymerized in the presence of:-(1) sodium methoxide and dimethyl carbonate; (2) sodium methoxide and N-methyl-(ethyl carbamate); (3) sodium methoxide and dimethyl guanidine; (4) potassium t-butoxide and diethyl carbonate; (5) potassium t-butoxide and methyl octyl carbonate; (6) lithium hydride and N-ethyl(ethyl carbamate); (7) sodium hydride and N-octyl-(ethyl carbamate); (8) potassium hydroxide and N-phenyl-(ethyl carbamate); (9) ethanolic sodium ethoxide and N-dodecyl-(ethyl carbamate); (10) sodium hydroxide and N-phenyl-(cyclohexyl carbamate); (11) sodium hydroxide and N-phenyl-(allyl carbamate); (12) lithium and diphenyl guanidine and (13) sodium and di-t-butyl carbonate.
GB3152860A 1960-09-13 1960-09-13 Improved lactam polymerisation process Expired GB924453A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3152860A GB924453A (en) 1960-09-13 1960-09-13 Improved lactam polymerisation process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3152860A GB924453A (en) 1960-09-13 1960-09-13 Improved lactam polymerisation process

Publications (1)

Publication Number Publication Date
GB924453A true GB924453A (en) 1963-04-24

Family

ID=10324444

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3152860A Expired GB924453A (en) 1960-09-13 1960-09-13 Improved lactam polymerisation process

Country Status (1)

Country Link
GB (1) GB924453A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2637010A1 (en) * 1976-08-17 1978-02-23 Bayer Ag ACTIVATED ANIONIC POLYMERIZATION

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2637010A1 (en) * 1976-08-17 1978-02-23 Bayer Ag ACTIVATED ANIONIC POLYMERIZATION

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