GB731664A - Production and spinning of polyamides from caprolactam - Google Patents

Production and spinning of polyamides from caprolactam

Info

Publication number
GB731664A
GB731664A GB2112/51A GB211251A GB731664A GB 731664 A GB731664 A GB 731664A GB 2112/51 A GB2112/51 A GB 2112/51A GB 211251 A GB211251 A GB 211251A GB 731664 A GB731664 A GB 731664A
Authority
GB
United Kingdom
Prior art keywords
melt
per cent
vessel
caprolactam
polymerized
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
GB2112/51A
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.)
Bayer AG
Original Assignee
Bayer 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 Bayer AG filed Critical Bayer AG
Publication of GB731664A publication Critical patent/GB731664A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
    • C08G69/08—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
    • C08G69/14—Lactams
    • C08G69/16—Preparatory processes
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D1/00—Treatment of filament-forming or like material
    • D01D1/06—Feeding liquid to the spinning head
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D1/00—Treatment of filament-forming or like material
    • D01D1/10—Filtering or de-aerating the spinning solution or melt
    • D01D1/103—De-aerating

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polyamides (AREA)

Abstract

<PICT:0731664/IV (a)/1> <PICT:0731664/IV (a)/2> Caprolactam is polymerized in a tube 1 or alternatively in a closed vessel 2 and the molten polymer taken by pump 3 via a filter 4 and pumps 7 to vacuum vessels 8 kept at polymerization temperature, the polyamide being further polymerized therein while monomeric lactam is removed via the tubes 9. A constant liquid level is maintained in the vacuum vessel by means of an electrically conducting ball which floats in the polyamide melt but sinks in the foam above the melt. When the melt is at the required level the ball makes contact with terminals in the vessel to control the motor driving the pump 7. The melt is removed from the vessels 8 by screw conveyers 24 having rapidly diminishing pitch which by raising the pressure assist in removing bubbles from the melt. In the vacuum vessel as large a surface as possible of the melt is offered, either by passing the melt through the vessel in the form of filaments or by flowing it down spiral trays (Figs. 4 and 5, not shown). From the screw conveyers pumps 11, 13 conduct the melt to spinnerets 14. In examples (1) caprolactam with 10 per cent water and 0.28 per cent acetic acid are reacted at 260 DEG C. while allowing escape of steam in a closed vessel. The vessel is then filled with nitrogen to 4-5 atmospheres pressure and the polymer, containing 11-12 per cent monomer, taken to the vacuum vessels of Fig. 1. After 30 minutes in the vessels at 250 DEG C. the polymer is free from monomer and polymerized to the required degree. After spinning the monomer content is 2-3 per cent. (2) Caprolactam with 1 per cent water and 0.27 per cent acetic acid is led into a heated tube having three sections at 180 DEG , 240 DEG and 260 DEG C. in which it is polymerized for 20 hours. The polymer, with a monomer content of 11-12 per cent, is treated as in example (1). Specifications 666,378 and 693,376 are referred to.
GB2112/51A 1950-01-27 1951-01-26 Production and spinning of polyamides from caprolactam Expired GB731664A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE294346X 1950-01-27

Publications (1)

Publication Number Publication Date
GB731664A true GB731664A (en) 1955-06-15

Family

ID=6084521

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2112/51A Expired GB731664A (en) 1950-01-27 1951-01-26 Production and spinning of polyamides from caprolactam

Country Status (3)

Country Link
CH (1) CH294346A (en)
FR (1) FR1033618A (en)
GB (1) GB731664A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2414396A1 (en) * 1978-01-16 1979-08-10 Usi Far East Corp INTEGRATED SYSTEM FOR THE FORMATION OF SYNTHETIC RESIN SHEETS
FR2455509A1 (en) * 1979-05-04 1980-11-28 Autoclavite Mfg. self-lubricating seals as long laminated strips - by co-vulcanisation of extruded composite strips to fit large paper mfg. rolls etc.
CN112391685A (en) * 2019-08-12 2021-02-23 中国科学院化学研究所 Molten resin defoaming method and spinning forming method

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1059611B (en) * 1954-04-10 1959-06-18 Hoechst Ag Device for spinning molten polyamides from vacuum chambers
DE1018223B (en) * 1954-12-06 1957-10-24 Leybold Hochvakuum Anlagen Process for removing low molecular weight components from high molecular weight polymerization and polycondensation products
US3015651A (en) * 1956-09-28 1962-01-02 Du Pont Increasing viscosity of polycaprolactam by removing extractables with solvents and further solid phase polymerizing the polymer
DE1180884B (en) * 1959-08-04 1964-11-05 Glanzstoff Ag Device for removing volatile components from viscous liquids, in particular polycondensates
DE1213981B (en) * 1963-01-02 1966-04-07 Hans Hench Device for the processing and degassing of polyamide melts or melt-liquid high polymers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2414396A1 (en) * 1978-01-16 1979-08-10 Usi Far East Corp INTEGRATED SYSTEM FOR THE FORMATION OF SYNTHETIC RESIN SHEETS
FR2455509A1 (en) * 1979-05-04 1980-11-28 Autoclavite Mfg. self-lubricating seals as long laminated strips - by co-vulcanisation of extruded composite strips to fit large paper mfg. rolls etc.
CN112391685A (en) * 2019-08-12 2021-02-23 中国科学院化学研究所 Molten resin defoaming method and spinning forming method
CN112391685B (en) * 2019-08-12 2023-03-21 中国科学院化学研究所 Molten resin defoaming method and spinning forming method

Also Published As

Publication number Publication date
CH294346A (en) 1953-11-15
FR1033618A (en) 1953-07-13

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