Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

High melt viscosity polyester or co-polyester compositions

A technology of copolyester and copolyetherester, applied in the field of polyester or copolyester elastomer composition

Inactive Publication Date: 2012-11-14
EI DU PONT DE NEMOURS & CO
View PDF8 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when articles made from copolyester elastomer blends containing ionomers are exposed to elevated temperatures of 60°C, the articles can undergo changes in their hardness and can exhibit phase separation, resulting in the formation of layers

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High melt viscosity polyester or co-polyester compositions
  • High melt viscosity polyester or co-polyester compositions
  • High melt viscosity polyester or co-polyester compositions

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0061] Preparation of melt mix compositions

[0062] The compositions described herein are melt-mixed blends in which all of the polymer components are uniformly dispersed in each other and all of the non-polymeric components are uniformly dispersed in and bound by the polymer matrix such that the blend form a unified whole. Any melt mixing method may be used to mix the polymeric and non-polymeric components of the present invention.

[0063] For example, the polymeric component and the non-polymeric component can be added to a melt mixer, such as a single-screw or twin-screw extruder; a mixer; a single-screw or twin-screw kneader, or a Banbury mixer, which can be obtained by The single-step addition is done all at once, or in a stepwise fashion, followed by melt mixing. When the polymeric and non-polymeric ingredients are added in a stepwise manner, a portion of the polymeric and / or non-polymeric ingredients are added first and then melt mixed with the remaining polymeric...

Embodiment

[0079] The Examples provide further details for the methods described herein.

[0080] Material

[0081] The following materials were used to prepare the melt blend compositions in the Examples and Comparative Examples.

[0082] Its polyester thermoplastic elastomer 1 (TPC1) : a copolyetherester elastomer comprising about 40% by weight of poly(tetrahydrofuran) terephthalate having an average molecular weight of about 1000 g / mol as copolyester long-chain ester units, said weight percent being based on the total weight of the copolyetherester elastomer weighing scale. The short-chain ester units are polybutylene terephthalate segments.

[0083] Copolyester thermoplastic elastomer 2 (TPC2) : a copolyetherester elastomer comprising about 77% by weight of poly(tetrahydrofuran) terephthalate having an average molecular weight of about 2000 g / mol as copolyester long-chain ester units, said weight percentage being based on the total weight of the copolyetherester elastomer we...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
widthaaaaaaaaaa
Login to View More

Abstract

Processes of decreasing the melt flow rate of a polyester selected from the group consisting of polyesters derived from one or more dicarboxylic acids and one or more diols having more than two carbon atoms, copolyester thermoplastic elastomers, and mixtures of these, by melt mixing with the polyester an alkali metal salt having a molecular weight less than 300 to provide a melt mixed composition. Processes of making a melt extruded article from such melt mixed compositions and the articles made therefrom.

Description

field of invention [0001] Said invention relates to the field of polyester or copolyester elastomeric compositions especially suitable for the preparation of articles by melt extrusion processes. Background of the invention [0002] Polymer compositions with high melt viscosity are ideally used to prepare hollow structures involving melt extrusion processes such as blow molding, profile extrusion, and wave extrusion in which molten material flows through a die assembly and is shaped into the final part. Blow molding is especially useful for producing hollow structures. Typically, a parison of plastic material in a thermo-moldable condition manufactured by extrusion or injection molding is placed between two halves of an open blow molding having a mold cavity of the shape corresponding to the desired shape of the product. During extrusion blow molding, the parison gradually moves and stretches under the influence of gravity. When the parison reaches the proper length, the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/10C08J5/00C08L67/02
CPCC08K5/098C08J5/00C08K2003/262C08K3/10C08L67/02C08K3/26C08G63/183
Inventor P.L.塞克利D.J.赖利
Owner EI DU PONT DE NEMOURS & CO
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com