DE3905412A1 - Process for improving the heat resistance of mouldings or thermoplastic materials - Google Patents

Process for improving the heat resistance of mouldings or thermoplastic materials

Info

Publication number
DE3905412A1
DE3905412A1 DE19893905412 DE3905412A DE3905412A1 DE 3905412 A1 DE3905412 A1 DE 3905412A1 DE 19893905412 DE19893905412 DE 19893905412 DE 3905412 A DE3905412 A DE 3905412A DE 3905412 A1 DE3905412 A1 DE 3905412A1
Authority
DE
Germany
Prior art keywords
thermoplastic materials
mouldings
heat resistance
improving
thermoplastic
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Withdrawn
Application number
DE19893905412
Other languages
German (de)
Inventor
Herbert Dipl Chem Dr Schaper
Reinhard Dipl Chem Dr Kraessig
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.)
Phoenix AG
Original Assignee
Phoenix 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 Phoenix AG filed Critical Phoenix AG
Priority to DE19893905412 priority Critical patent/DE3905412A1/en
Publication of DE3905412A1 publication Critical patent/DE3905412A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/02—Thermal after-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2069/00—Use of PC, i.e. polycarbonates or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2071/00—Use of polyethers, e.g. PEEK, i.e. polyether-etherketone or PEK, i.e. polyetherketone or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3055—Cars

Abstract

The invention relates to a process for producing mouldings from thermoplastic materials, in particular polycarbonates, polyether esters or blends based on the latter with other thermoplastic materials. The essential feature of this invention is that, after the thermoplastic processing (process step I), the mouldings are thermally aftertreated for 30 minutes to 3 hours at 100 to 180@C (process step II).

Description

Die Erfindung betrifft ein Verfahren gemäß Oberbegriff des Anspruchs 1.The invention relates to a method according to the preamble of Claim 1.

Aufgabe der Erfindung ist es, das Wärmestandverhalten (Wärmestandfestigkeit) von Formkörpern aus thermoplastischen Werkstoffen zu verbessern. Gelöst wird diese Aufgabe durch das Kennzeichen des Anspruchs 1.The object of the invention is the thermal stability behavior (Heat resistance) of molded articles made of thermoplastic Improve materials. This task is solved by the characterizing part of claim 1.

Überraschenderweise zeigen thermoplastische Werkstoffe, wie z. B. Polycarbonate, Polyetherester oder Verschnitte auf dieser Basis mit anderen Thermoplasten nach einem Tempervorgang eine erhebliche Verbesserung des Wärmestandverhaltens. Zur Ermittlung des Wärmestandverhaltens wird der sogenannte Sag-Test herangezogen, der in folgender Weise durchgeführt wird: Ein Prüfstab als Probekörper von 200 mm Länge, 25 mm Breite und 3 bis 4 mm Stärke wird auf einer Unterlage fest aufgelegt und zwar so, daß 50 mm fest unterstützt werden und der Restbereich (150 mm) frei über die Unterstützungsfläche herausragt. Gemessen wird der Betrag der Absenkung in Millimeter am Ende des Stabes gegenüber dem Ausgangszustand nach einer Erwärmung von beispielsweise 1 Stunde bei 120°C. Je kleiner der Sagwert (Kurzbezeichnung "sag"), um so größer ist die Wärmestandfestigkeit. Dieser Effekt fällt überraschend hoch aus. Folgende Verbesserung wurde beispielsweise festgestellt:
Erniedrigung des Durchhängeefektes bei einem PC/PETP-Verschnitt von 14,1 auf 2,0 mm bei einer Probendicke von 3 mm; bei einem Polyetherester/PBTB-Verschnitt von 20,7 auf 10,5 mm bei einer Probendicke von ebenfalls 3 mm. Die thermische Nachbehandlung erfolgte bei 100°C/60 min.Surprisingly, thermoplastic materials, such as. B. polycarbonates, polyether esters or blends on this basis with other thermoplastics after a tempering process a significant improvement in the heat resistance. To determine the heat resistance behavior, the so-called sag test is used, which is carried out in the following way: A test rod as a test specimen of 200 mm length, 25 mm width and 3 to 4 mm thickness is placed firmly on a base in such a way that 50 mm be firmly supported and the remaining area (150 mm) protrudes freely above the support surface. The amount of reduction in millimeters at the end of the rod compared to the initial state after heating for, for example, 1 hour at 120 ° C. is measured. The smaller the sag value (short name "sag"), the greater the heat resistance. This effect is surprisingly high. For example, the following improvement was noted:
Lowering of the sagging defect with a PC / PETP blend from 14.1 to 2.0 mm with a sample thickness of 3 mm; with a polyetherester / PBTB blend from 20.7 to 10.5 mm with a sample thickness of likewise 3 mm. The thermal aftertreatment was carried out at 100 ° C./60 min.

Deutung: Durch das Tempern werden eingefrorene Spannungen im Thermoplast gelöst und eingefrorene amorphe Bereiche können sich zu teilkristallinen Bereichen umformieren. Diese bewirken bei späterer Wärmebeanspruchung eine verbesserte Dimensions­ stabilität der Artikel im Einsatz, z. B. als Karosserieteil.Interpretation: Tempering causes frozen tensions in the Thermoplastic dissolved and frozen amorphous areas can transform into semi-crystalline areas. Do this with later heat stress an improved dimension Stability of the articles in use, e.g. B. as a body part.

Bisher war lediglich bekannt, daß Thermoplaste bzw. thermo­ plastische Elastomere unmittelbar nach ihrer Herstellung, nicht jedoch nach der thermoplastischen Verarbeitung, getempert werden. So wird beispielsweise in der DE-A-27 02 626 ein Verfahren zur Herstellung von Polycarbonat-Elastomeren beschrieben, bei dem C-C-verknüpfte Elastomere mit Diphenolen und Phosgen nach dem bekannten Zweiphasengrenzflächen- Polykondensationsverfahren umgesetzt werden, wobei die erhaltenen Reaktionsprodukte entweder bei Temperaturen zwischen 40 und 100°C zwischen 15 Minuten und 24 Stunden getempert oder in Lösung von organischen Lösungsmitteln geliert werden.So far it was only known that thermoplastics or thermo plastic elastomers immediately after their manufacture, but not after thermoplastic processing will. For example, in DE-A-27 02 626 Process for the production of polycarbonate elastomers described in the C-C-linked elastomers with diphenols and phosgene according to the known two-phase interface Polycondensation are implemented, the obtained reaction products either at temperatures between 40 and 100 ° C between 15 minutes and 24 hours annealed or in solution of organic solvents be gelled.

Claims (2)

1. Verfahren zum Herstellen von Formkörpern aus thermo­ plastischen Werkstoffen, insbesondere Polycarbonaten, Polyetherestern oder Verschnitten auf dieser Basis mit anderen thermoplastischen Werkstoffen, dadurch gekennzeichnet, daß die Formkörper nach der thermo­ plastischen Verarbeitung (Verfahrensschritt I) 30 Minuten bis 3 Stunden bei 100 bis 180°C thermisch nachbehandelt werden (Verfahrensschritt II).1. Process for the production of moldings from thermoplastic materials, in particular polycarbonates, polyether esters or blends on this basis with other thermoplastic materials, characterized in that the moldings after thermoplastic processing (process step I) 30 minutes to 3 hours at 100 to 180 ° C are thermally aftertreated (process step II). 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Formkörper 30 bis 90 Minuten bei 100 bis 120°C thermisch nachbehandelt werden.2. The method according to claim 1, characterized in that the moldings at 100 to 120 ° C for 30 to 90 minutes be thermally treated.
DE19893905412 1988-02-24 1989-02-22 Process for improving the heat resistance of mouldings or thermoplastic materials Withdrawn DE3905412A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19893905412 DE3905412A1 (en) 1988-02-24 1989-02-22 Process for improving the heat resistance of mouldings or thermoplastic materials

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3805613 1988-02-24
DE19893905412 DE3905412A1 (en) 1988-02-24 1989-02-22 Process for improving the heat resistance of mouldings or thermoplastic materials

Publications (1)

Publication Number Publication Date
DE3905412A1 true DE3905412A1 (en) 1989-09-07

Family

ID=25865119

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19893905412 Withdrawn DE3905412A1 (en) 1988-02-24 1989-02-22 Process for improving the heat resistance of mouldings or thermoplastic materials

Country Status (1)

Country Link
DE (1) DE3905412A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4018114A1 (en) * 1990-06-06 1991-12-12 Lucas Ind Plc Annealing workpieces of thermoset material for piston - by programmed temp. increase of phenolic resin over hours, with annealing temp. below glass transition point
EP0724950A1 (en) * 1995-01-20 1996-08-07 General Electric Company Process for the annealing of objects out of thermoplastic materials
DE10054431B4 (en) * 2000-10-26 2009-12-03 Volkswagen Ag Method for painting a plastic body part and tempering frame
DE10054433B4 (en) * 2000-10-26 2009-12-17 Volkswagen Ag Method for painting a body part

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4018114A1 (en) * 1990-06-06 1991-12-12 Lucas Ind Plc Annealing workpieces of thermoset material for piston - by programmed temp. increase of phenolic resin over hours, with annealing temp. below glass transition point
EP0724950A1 (en) * 1995-01-20 1996-08-07 General Electric Company Process for the annealing of objects out of thermoplastic materials
DE10054431B4 (en) * 2000-10-26 2009-12-03 Volkswagen Ag Method for painting a plastic body part and tempering frame
DE10054433B4 (en) * 2000-10-26 2009-12-17 Volkswagen Ag Method for painting a body part

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Legal Events

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8139 Disposal/non-payment of the annual fee