FR2376875A1 - Procede pour la depolymerisation de polymeres hydroxycarboxyles et polymeres obtenus - Google Patents
Procede pour la depolymerisation de polymeres hydroxycarboxyles et polymeres obtenusInfo
- Publication number
- FR2376875A1 FR2376875A1 FR7700669A FR7700669A FR2376875A1 FR 2376875 A1 FR2376875 A1 FR 2376875A1 FR 7700669 A FR7700669 A FR 7700669A FR 7700669 A FR7700669 A FR 7700669A FR 2376875 A1 FR2376875 A1 FR 2376875A1
- Authority
- FR
- France
- Prior art keywords
- polymers
- hydroxycarboxyl
- depolymerizing
- molecular weight
- polymers obtained
- 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.)
- Granted
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
- C08F8/00—Chemical modification by after-treatment
- C08F8/50—Partial depolymerisation
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
- Y10S264/51—Use of fluidized bed in molding
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S526/00—Synthetic resins or natural rubbers -- part of the class 520 series
- Y10S526/933—Detergent property or lubricant additive
Landscapes
- Chemical & Material Sciences (AREA)
- General 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)
- Polyesters Or Polycarbonates (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
a. L'invention concerne un procédé d'obtention de polymères hydroxycarboxylés de masse moléculaire réduite. b. La réduction de la masse moléculaire est réalisée par chauffage d'un polymère, de masse moléculaire plus élevée, en milieu gazeux, à des températures comprises entre 60 et 240 degrés C. c. L'invention permet d'obtenir des polymères de masse moléculaire réduite utilisables comme adjuvants actifs (builders) en détergence.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7700669A FR2376875A1 (fr) | 1977-01-10 | 1977-01-10 | Procede pour la depolymerisation de polymeres hydroxycarboxyles et polymeres obtenus |
BE1008624A BE862619A (fr) | 1977-01-10 | 1978-01-04 | Procede pour la depolymerisation de polymeres hydroxycarboxyles et polymeres obtenus |
JP105178A JPS5388090A (en) | 1977-01-10 | 1978-01-09 | Process for depolymerizing polymer of oxycarboxylic acid and polymer obtained therefrom |
GB693/78A GB1548120A (en) | 1977-01-10 | 1978-01-09 | Process for the partial depolymerisation of hydroxycarboxylic polymers and polymers abtained thereby |
US05/868,467 US4145526A (en) | 1977-01-10 | 1978-01-09 | Process for depolymerizing hydroxycarboxylic polymers |
IT19137/78A IT1092720B (it) | 1977-01-10 | 1978-01-10 | Processo per la depolimerizzazione di polimeri idrossicarbossilati e polimeri cosi' ottenuti |
DE19782800920 DE2800920A1 (de) | 1977-01-10 | 1978-01-10 | Verfahren zur depolymerisation von hydroxycarboxylpolymerisaten und nach dem verfahren erhaltene polymerisate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7700669A FR2376875A1 (fr) | 1977-01-10 | 1977-01-10 | Procede pour la depolymerisation de polymeres hydroxycarboxyles et polymeres obtenus |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2376875A1 true FR2376875A1 (fr) | 1978-08-04 |
FR2376875B1 FR2376875B1 (fr) | 1979-04-20 |
Family
ID=9185371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7700669A Granted FR2376875A1 (fr) | 1977-01-10 | 1977-01-10 | Procede pour la depolymerisation de polymeres hydroxycarboxyles et polymeres obtenus |
Country Status (7)
Country | Link |
---|---|
US (1) | US4145526A (fr) |
JP (1) | JPS5388090A (fr) |
BE (1) | BE862619A (fr) |
DE (1) | DE2800920A1 (fr) |
FR (1) | FR2376875A1 (fr) |
GB (1) | GB1548120A (fr) |
IT (1) | IT1092720B (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3302495A1 (de) * | 1983-01-26 | 1984-07-26 | Basf Ag | Verfahren zum entfernen von physiologisch bedenklichen loesungsmitteln aus carboxyl- oder saeureanhydridgruppen enthaltenden polymerisaten |
DE3302496A1 (de) * | 1983-01-26 | 1984-07-26 | Basf Ag, 6700 Ludwigshafen | Verfahren zur erhoehung der wirksamkeit von hochmolekularen vernetzten polycarbonsaeuren |
JPS59232811A (ja) * | 1983-06-16 | 1984-12-27 | Sumitomo Chem Co Ltd | 芳香族ポリアミドイミド樹脂成形体の製造方法 |
US4624993A (en) * | 1985-02-08 | 1986-11-25 | Moore And Munger, Inc. | Method for depolymerizing polymers |
US5241026A (en) * | 1986-07-03 | 1993-08-31 | Sandoz Ltd. | Polylactones of poly-α-hydroxyacrylic acid |
DE3720806C2 (de) * | 1986-07-03 | 1997-08-21 | Clariant Finance Bvi Ltd | Verwendung eines Stabilisators in Peroxydbleichverfahren |
US4992528A (en) * | 1988-12-05 | 1991-02-12 | The United States Of America, As Represented By The Administrator Of The National Aeronautics And Space Administration | Light weight polymer matrix composite material |
US6861568B1 (en) * | 1998-05-15 | 2005-03-01 | Wyoming Research Corporation | Process for waste plastic recycling |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2372001A (en) * | 1942-02-26 | 1945-03-20 | Du Pont | Pyrolysis products of solid polymers of ethylene |
NL254392A (fr) | 1959-07-31 | |||
US3311583A (en) * | 1963-11-06 | 1967-03-28 | Dow Chemical Co | Terpolymer acrylates-acrylic acid-hydroxyalkyl esters of acrylic acid |
SE375103B (fr) * | 1968-02-07 | 1975-04-07 | Toray Industries |
-
1977
- 1977-01-10 FR FR7700669A patent/FR2376875A1/fr active Granted
-
1978
- 1978-01-04 BE BE1008624A patent/BE862619A/fr unknown
- 1978-01-09 GB GB693/78A patent/GB1548120A/en not_active Expired
- 1978-01-09 JP JP105178A patent/JPS5388090A/ja active Pending
- 1978-01-09 US US05/868,467 patent/US4145526A/en not_active Expired - Lifetime
- 1978-01-10 IT IT19137/78A patent/IT1092720B/it active
- 1978-01-10 DE DE19782800920 patent/DE2800920A1/de not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
NEANT * |
Also Published As
Publication number | Publication date |
---|---|
BE862619A (fr) | 1978-07-04 |
DE2800920A1 (de) | 1978-07-13 |
JPS5388090A (en) | 1978-08-03 |
IT7819137A0 (it) | 1978-01-10 |
US4145526A (en) | 1979-03-20 |
IT1092720B (it) | 1985-07-12 |
FR2376875B1 (fr) | 1979-04-20 |
GB1548120A (en) | 1979-07-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |