BR9802294A - Method for recycling aromatic polycarbonates. - Google Patents

Method for recycling aromatic polycarbonates.

Info

Publication number
BR9802294A
BR9802294A BR9802294A BR9802294A BR9802294A BR 9802294 A BR9802294 A BR 9802294A BR 9802294 A BR9802294 A BR 9802294A BR 9802294 A BR9802294 A BR 9802294A BR 9802294 A BR9802294 A BR 9802294A
Authority
BR
Brazil
Prior art keywords
solvent
aromatic polycarbonates
solid
followed
recycled
Prior art date
Application number
BR9802294A
Other languages
Portuguese (pt)
Inventor
Godavarthi Satyana Varadarajan
Joseph Anthony King
Bhaskar Bhairavnath Idage
Swaminathan Sivaram
Vshnu Ramchandra Ranade
Original Assignee
Gen Electric
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 Gen Electric filed Critical Gen Electric
Publication of BR9802294A publication Critical patent/BR9802294A/en

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
    • C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
    • C08G64/40—Post-polymerisation treatment
    • 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
    • C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
    • C08G64/04—Aromatic polycarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • C08J11/04—Recovery or working-up of waste materials of polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/20—Recycled plastic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Processing Of Solid Wastes (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Patente de Invenção:<B>"MéTODO PARA A RECICLAGEM DE POLICARBONATOS AROMáTICOS"<D>. Os policarbonatos são reciclados sem a necessidade de modificação química por dissolução em um solvente seguido da remoção de quaisquer materiais insolúveis e da precipitação por adição de um não-solvente. A etapa de precipitação pode ser seguida por polimerização de estado sólido do policarbonato reciclado. Particularmente, quando a polimerização de estado sólido deve ser feita, o uso de uma combinação de solvente e não-solvente que produz um intermediário cristalino é realizado, e o uso de um reagente modificante que aumenta a concentração de grupo terminal hidróxi do policarbonato pode ser vantajoso.Invention Patent: <B> "METHOD FOR RECYCLING AROMATIC POLYCARBONATES" <D>. The polycarbonates are recycled without the need for chemical modification by dissolving in a solvent followed by the removal of any insoluble materials and precipitation by the addition of a non-solvent. The precipitation step can be followed by solid-state polymerization of the recycled polycarbonate. Particularly, when solid-state polymerization is to be carried out, the use of a combination of solvent and non-solvent that produces a crystalline intermediate is performed, and the use of a modifying reagent that increases the concentration of the polycarbonate hydroxy end group can be advantageous.

BR9802294A 1997-09-02 1998-06-26 Method for recycling aromatic polycarbonates. BR9802294A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN1619CA1997 1997-09-02

Publications (1)

Publication Number Publication Date
BR9802294A true BR9802294A (en) 1999-12-14

Family

ID=11086794

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9802294A BR9802294A (en) 1997-09-02 1998-06-26 Method for recycling aromatic polycarbonates.

Country Status (5)

Country Link
JP (1) JPH11152371A (en)
KR (1) KR19990029426A (en)
AU (1) AU8189798A (en)
BR (1) BR9802294A (en)
SG (1) SG81227A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040016514A (en) * 2002-08-17 2004-02-25 에쓰대시오일 주식회사 Pretreatment methods for polycarbonate solid state polymerization
JPWO2021132419A1 (en) 2019-12-27 2021-07-01
CN114644776B (en) * 2022-04-29 2023-09-01 聊城鲁西聚碳酸酯有限公司 System and method for recycling polycarbonate powder
WO2024111541A1 (en) * 2022-11-25 2024-05-30 三菱瓦斯化学株式会社 Method for producing reclaimed polycarbonate resin

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1173250B (en) * 1958-06-12 1964-07-02 Pittsburgh Plate Glass Co Process for the production of pure, grainy polycarbonates with a high bulk weight
DE4009308A1 (en) * 1990-03-23 1991-09-26 Bayer Ag Recycling scrap polymers - by filtering soln. of the polymer through sand to remove insol. impurities
DE4009496A1 (en) * 1990-03-24 1991-09-26 Goeppinger Kaliko Gmbh Recovering pure-grade plastics from impure scrap - by dissolving in a suitable solvent and reprecipitating with a non-solvent
DE4112786A1 (en) * 1991-04-19 1992-10-22 Bayer Ag METHOD FOR SEPARATING INORGANIC PIGMENTS FROM THERMOPLASTIC POLYCONDENSATES
US5717056A (en) * 1996-05-24 1998-02-10 General Electric Company Method for preparing polycarbonate by solid state polymerization

Also Published As

Publication number Publication date
AU8189798A (en) 1999-03-18
SG81227A1 (en) 2001-06-19
KR19990029426A (en) 1999-04-26
JPH11152371A (en) 1999-06-08

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Legal Events

Date Code Title Description
FA10 Dismissal: dismissal - article 33 of industrial property law