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Polyester Compounds

A technology of composition and molding composition, applied in the field of polyester composition, which can solve the problems of slow crystallization, difficult processability, poor mechanical properties, etc.

Inactive Publication Date: 2015-06-03
LANXESS DEUTDCHLAND GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, one disadvantage of the aromatic polyesters of WO 2010 / 049531 A1 is the high processing temperature on melting due to the high melting point of the described polymers, which is a temperature of 355° C. or higher, and another disadvantage is that 175° C. or higher high molding temperature
Disadvantages of the compositions according to WO 2007 / 033129 A2 are poorer mechanical properties compared to pure PET and their more difficult processability due to slower crystallization of PCT

Method used

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  • Polyester Compounds
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[0171] In order to produce the composition described according to the invention, a twin-screw extruder (from Coperion Werner and Friedel GmbH ( Coperion Werner & Pfleiderer) (Stuttgart, Germany) ZSK 26 Mega mixer) the individual components were mixed and discharged as an extrudate, and the extrudate was cooled until it could be pelletized and processed. grain. The granulated material was dried in a vacuum oven at 120° C. for about 2 h before further steps.

[0172] The sheets and test specimens listed in Table 1 for the study were injection molded by a conventional injection molding machine at a melting temperature of 285°C-295°C and a mold temperature of 80°C-120°C.

[0173] Short-term thermal deformation resistance

[0174] The tests used to determine short-term heat distortion resistance or solder bath resistance simulate wave soldering conditions as follows:

[0175] A plurality of test pieces having a size of 20·10·1 mm were cut out from one sheet having a thickness of...

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Abstract

The invention relates to compositions comprising polyethylene terephthalate (PET), poly(1,4-cyclohexanedimethanol terephthalate) (PCT) and titanium dioxide, to the use of these compositions for production of products resistant to heat distortion for short periods, and to a process for producing polyester-based products resistant to heat distortion for short periods, preferably electric or electronic polyester-based products, especially polyester-based optoelectronic products.

Description

technical field [0001] The present invention relates to compositions, especially thermoplastic molding compositions, comprising polyethylene terephthalate (PET), poly(1,4-cyclohexanedimethylene terephthalate) ( PCT) and titanium dioxide, to the use of these compositions in the form of molding compositions for the production of products resistant to short-term thermal deformation, and to a product for the production of polyester-based products resistant to short-term thermal deformation, preferably polyester-based electrical or electronics, especially polyester-based optoelectronics. Background technique [0002] EP 2465896A1 describes compositions based on PET and polybutylene terephthalate (PBT), and also titanium dioxide and glass fibers, for use in polyester-based products, especially optoelectronic products. US-A 4874809 discloses glass fiber and mica reinforced polyesters for low warpage products based on PET and PCT. [0003] Many electronic and electrical assemblies...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K13/04C08K3/36C08K7/14C08K3/34C08K5/526C08K5/103
CPCC08K2003/2241C08K3/22C08K3/34C08K7/14C08K9/06C08L67/02B29K2067/003B29K2105/0088B29K2105/0032B29K2309/08B29K2105/0005B29K2105/0044B29K2105/0085B29K2995/0016B29C48/022B29C45/0001C08J5/043C08J2367/02C08J2467/02
Inventor 蒂莫·伊梅尔约亨·恩特尔马蒂亚斯·比恩米勒
Owner LANXESS DEUTDCHLAND GMBH
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