FR2436796A1 - Procede pour la preparation de matieres a mouler a base de copolymeres d'oxymethylene avec une faible proportion de formaldehyde - Google Patents
Procede pour la preparation de matieres a mouler a base de copolymeres d'oxymethylene avec une faible proportion de formaldehydeInfo
- Publication number
- FR2436796A1 FR2436796A1 FR7917713A FR7917713A FR2436796A1 FR 2436796 A1 FR2436796 A1 FR 2436796A1 FR 7917713 A FR7917713 A FR 7917713A FR 7917713 A FR7917713 A FR 7917713A FR 2436796 A1 FR2436796 A1 FR 2436796A1
- Authority
- FR
- France
- Prior art keywords
- polymer
- low proportion
- heating
- mass
- formaldehyde
- 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.)
- Withdrawn
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
- C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
- C08G2/30—Chemical modification by after-treatment
- C08G2/36—Chemical modification by after-treatment by depolymerisation
-
- 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
- C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
- C08G2/28—Post-polymerisation treatments
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Phenolic Resins Or Amino Resins (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
DES MATIERES A MOULER A BASE DE COPOLYMERES D'OXYMETHYLENE CONTENANT UNE FAIBLE PROPORTION DE FORMALDEHYDE RESIDUEL SONT PREPAREES PAR CHAUFFAGE DE LA MASSE FONDUE DE POLYMERE, MELANGEE AVEC DES STABILISANTS CHIMIQUES, DANS UN DISPOSITIF DANS LEQUEL SONT CONSTAMMENT OFFERTES DE NOUVELLES SURFACES DU POLYMERE, SOUS PRESSION REDUITE. LE CHAUFFAGE DE LA MASSE FONDUE DE POLYMERE EST EFFECTUE DANS UN EVAPORATEUR A COUCHES MINCES POUR SUBSTANCES TRES VISQUEUSES PENDANT UN TEMPS DE SEJOUR MOYEN DE 30 A 120 SECONDES, AVEC UN GRADIENT DE CISAILLEMENT COMPRIS ENTRE 500 ET 2000S ET SOUS UNE PRESSION PABS DE 150MBARS AU MAXIMUM. LES GAZ ET VAPEURS QUI SE DEGAGENT SONT EVACUES A CONTRE-COURANT PAR RAPPORT A LA MASSE FONDUE DE POLYMERE. ON OBTIENT AINSI DIRECTEMENT LES MATIERES A MOULER, SANS QU'IL SOIT NECESSAIRE DE PREVOIR UN TRAITEMENT ULTERIEUR PARTICULIER DE CES MASSES LES RENDANT UTILISABLES ET TRANSFORMABLES DE LA MANIERE HABITUELLE.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2840679A DE2840679C2 (de) | 1978-09-19 | 1978-09-19 | Verfahren zur Herstellung von Oxymethylencopolymerisat-Formmassen mit geringem Anteil an Restformaldehyd |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2436796A1 true FR2436796A1 (fr) | 1980-04-18 |
Family
ID=6049816
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7917713A Withdrawn FR2436796A1 (fr) | 1978-09-19 | 1979-07-09 | Procede pour la preparation de matieres a mouler a base de copolymeres d'oxymethylene avec une faible proportion de formaldehyde |
Country Status (12)
Country | Link |
---|---|
US (1) | US4225703A (fr) |
JP (1) | JPS5543191A (fr) |
BE (1) | BE878840A (fr) |
DD (1) | DD146055A5 (fr) |
DE (1) | DE2840679C2 (fr) |
FR (1) | FR2436796A1 (fr) |
GB (1) | GB2030576B (fr) |
IT (1) | IT1162421B (fr) |
NL (1) | NL7905636A (fr) |
PL (1) | PL116522B1 (fr) |
SE (1) | SE7907737L (fr) |
SU (1) | SU852177A3 (fr) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55157617A (en) * | 1979-05-28 | 1980-12-08 | Mitsubishi Gas Chem Co Inc | Thermal stabilization of oxymethylene copolymer |
US4458064A (en) * | 1982-02-19 | 1984-07-03 | Celanese Corporation | Process and apparatus for continual melt hydrolysis of acetal copolymers |
JPS58167608A (ja) | 1982-03-29 | 1983-10-03 | Asahi Chem Ind Co Ltd | 重合触媒失活法 |
JPS59227916A (ja) * | 1983-06-08 | 1984-12-21 | Polyplastics Co | トリオキサンの重合体及び共重合体の製造法 |
JPS601216A (ja) * | 1983-06-17 | 1985-01-07 | Polyplastics Co | トリオキサンの共重合体製造法 |
US4650692A (en) * | 1985-11-01 | 1987-03-17 | Ashland Oil, Inc. | Metal-sulfonate/piperidine derivative combination protective coatings |
CN1035510C (zh) * | 1990-09-29 | 1997-07-30 | 化学工业部晨光化工研究院一分院 | 一步法聚甲醛熔融后处理工艺 |
US5822868A (en) * | 1995-09-12 | 1998-10-20 | Hna Holdings, Inc. | Luminous flame of acetal polymers |
JP3771008B2 (ja) * | 1997-07-16 | 2006-04-26 | ポリプラスチックス株式会社 | 分岐又は架橋ポリアセタール樹脂の製造方法 |
US20040063853A1 (en) * | 1998-04-08 | 2004-04-01 | Stefan Disch | Polyoxymethylene moulding material with improved processing stability and a reduced emissions tendency |
CN114058152B (zh) * | 2021-12-13 | 2024-07-05 | 重庆云天化天聚新材料有限公司 | 一种共聚甲醛树脂组合物及制备方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1253553A (fr) * | 1959-04-02 | 1961-02-10 | Celanese Corp | Traitement de polymères d'oxyméthylène pour en faciliter le moulage ultérieur |
DE2436384A1 (de) * | 1974-07-29 | 1976-02-12 | Basf Ag | Verfahren zur entfernung von geruchsbildendem formaldehyd aus stabilisierten geformten polyoxymethylenen |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1720271U (fr) | 1900-01-01 | |||
US3147234A (en) | 1958-02-28 | 1964-09-01 | Celanese Corp | Modified oxymethylene polymers |
DE1794387U (de) | 1959-05-29 | 1959-08-27 | Alfred Dr Neff | Oelbeheizter kuechenherd. |
DE1246244C2 (de) * | 1964-11-11 | 1976-04-01 | Basf Ag, 6700 Ludwigshafen | Verfahren zum aufarbeiten von copolymerisaten des trioxans |
US3640928A (en) | 1968-06-12 | 1972-02-08 | Sankyo Co | Stabilization of synthetic polymers |
CH523087A (de) | 1969-03-21 | 1972-05-31 | Luwa Ag | Dünnschichtbehandlungsapparat |
US3960984A (en) * | 1974-04-16 | 1976-06-01 | E. I. Du Pont De Nemours And Company | Composition of oxymethylene polymer and amide oligomers |
DE2540207B1 (de) | 1975-09-10 | 1976-11-18 | Degussa | Polyoxymethylen-Formmassen(I) |
-
1978
- 1978-09-19 DE DE2840679A patent/DE2840679C2/de not_active Expired
-
1979
- 1979-07-09 SU SU792783204A patent/SU852177A3/ru active
- 1979-07-09 FR FR7917713A patent/FR2436796A1/fr not_active Withdrawn
- 1979-07-19 NL NL7905636A patent/NL7905636A/nl not_active Application Discontinuation
- 1979-09-11 US US06/074,766 patent/US4225703A/en not_active Expired - Lifetime
- 1979-09-12 GB GB7931605A patent/GB2030576B/en not_active Expired
- 1979-09-13 PL PL1979218276A patent/PL116522B1/pl unknown
- 1979-09-14 DD DD79215564A patent/DD146055A5/de unknown
- 1979-09-17 BE BE6/46945A patent/BE878840A/fr not_active IP Right Cessation
- 1979-09-17 IT IT50275/79A patent/IT1162421B/it active
- 1979-09-18 SE SE7907737A patent/SE7907737L/ not_active Application Discontinuation
- 1979-09-19 JP JP11943779A patent/JPS5543191A/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1253553A (fr) * | 1959-04-02 | 1961-02-10 | Celanese Corp | Traitement de polymères d'oxyméthylène pour en faciliter le moulage ultérieur |
DE1445273A1 (de) * | 1959-04-02 | 1969-01-30 | Celanese Corp | Verfahren zur Behandlung von Oxymethylenpolymeren |
DE2436384A1 (de) * | 1974-07-29 | 1976-02-12 | Basf Ag | Verfahren zur entfernung von geruchsbildendem formaldehyd aus stabilisierten geformten polyoxymethylenen |
FR2280659A1 (fr) * | 1974-07-29 | 1976-02-27 | Basf Ag | Procede pour eliminer le formaldehyde odorant des polyoxymethylenes stabilises et faconnes |
Also Published As
Publication number | Publication date |
---|---|
PL116522B1 (en) | 1981-06-30 |
NL7905636A (nl) | 1980-03-21 |
IT7950275A0 (it) | 1979-09-17 |
SE7907737L (sv) | 1980-03-20 |
DE2840679C2 (de) | 1982-03-18 |
DE2840679A1 (de) | 1980-03-20 |
PL218276A1 (fr) | 1980-06-02 |
SU852177A3 (ru) | 1981-07-30 |
GB2030576A (en) | 1980-04-10 |
IT1162421B (it) | 1987-04-01 |
GB2030576B (en) | 1982-12-22 |
DD146055A5 (de) | 1981-01-21 |
BE878840A (fr) | 1980-03-17 |
JPS5543191A (en) | 1980-03-26 |
US4225703A (en) | 1980-09-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR2436796A1 (fr) | Procede pour la preparation de matieres a mouler a base de copolymeres d'oxymethylene avec une faible proportion de formaldehyde | |
FR2402525A1 (fr) | Procede de fabrication de compositions de lentilles de contact molles et nouveaux produits ainsi obtenus | |
FR2421193A1 (fr) | Composition de polymere/polyol convertible en urethane comportant un polymere/polyol preforme, son procede de preparation et son application | |
NO961283L (no) | Reaksjonsinjeksjonsstöping for fremstilling av kontaktlinser | |
NO152862B (no) | Baerbart apparat for tilsetting av gass til vaeske | |
GB1404293A (en) | Capillary devices and methods for their manufacture | |
DE3479121D1 (en) | Polysiloxane composition with improved surface wetting characteristics and biomedical devices made thereof | |
FI871957A (fi) | Foerfarande foer framstaellning av polymerer och kopolymerer av amidosulfonsyra innehaollande monomerer och deras salter. | |
FR2708617A1 (fr) | Particules de résine du type styrène expansible et articles en matériau alvéolaire fabriqués à partir de ces particules. | |
FR2401749A1 (fr) | Malaxage et moulage par injection des hydrosilicates | |
FR2455940A1 (fr) | Procede de fabrication d'objets en matiere ceramique ou metallique par pressage isostatique de poudres | |
DK0402826T3 (da) | Fremgangsmåde til fremstilling af ethylencopolymerer fyldt med ikke-fibrøse carbonhydrater | |
SE7705211L (sv) | Forfarande for framstellning av grovkorniga oximetylenpolymerer | |
JPS57119805A (en) | Catalytic membrane for hydrolysis | |
AU548792B2 (en) | Hydrophilic polymer for controlled release of active material | |
DE3071755D1 (en) | Anisotropic melt-forming polymer | |
US2463550A (en) | Method of making artificial teeth | |
FR2603890A1 (fr) | Procede de preparation d'homo- et copolymeres du chlorure de vinyle aptes a donner des plastisols | |
JPS55102653A (en) | Production of water-containing polymer molding | |
DK256188D0 (da) | Fremgangsmaade til fremstilling af polymerpartikler eller polymerlatexer med implanterede amfiphite molekyler | |
US3028343A (en) | Preparation of a foamed methyl chloroacrylate polymer | |
SU411102A1 (fr) | ||
SE7414343L (fr) | ||
JPS51130494A (en) | Preparation of morified tetrafluoroethyelene | |
Ereminko et al. | Kinetic Characteristics of Flow of Tin Over Iron When Drop Runs Over Upper Plate |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |