Unlock instant, AI-driven research and patent intelligence for your innovation.

Transparent and flexible blends of pmma and polycarbonate-siloxane copolymer

A technology of siloxane and carbonate, applied in the field of thermoplastic composition, can solve the problems such as transparent blends that have not yet been developed

Active Publication Date: 2021-07-23
SHPP GLOBAL TECH BV
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Blends of PMMA and PC would be expected to have improved flexibility, which could be suitable for electronic display applications, but suitable transparent blends including these polymers have not yet been developed

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
  • Transparent and flexible blends of pmma and polycarbonate-siloxane copolymer
  • Transparent and flexible blends of pmma and polycarbonate-siloxane copolymer
  • Transparent and flexible blends of pmma and polycarbonate-siloxane copolymer

Examples

Experimental program
Comparison scheme
Effect test

example

[0154] The following examples are presented in order to provide those skilled in the art with a complete disclosure and description of how to make and evaluate the compounds, compositions, articles of manufacture, devices and / or methods claimed herein, and are intended to be purely illustrative and not intended to limit the present disclosure. Efforts have been made to ensure accuracy with respect to numbers (eg amounts, temperature, etc.), but some errors and deviations should be accounted for. Unless indicated otherwise, parts are parts by weight, temperature is in °C or is at ambient temperature, and pressure is at or near atmospheric. References to composition percentages are in terms of wt % unless otherwise indicated.

[0155] There are many variations and combinations of reaction conditions, such as component concentrations, desired solvents, solvent mixtures, temperatures, pressures, and other reaction ranges and conditions that can be used to optimize product purity a...

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
storage modulusaaaaaaaaaa
storage modulusaaaaaaaaaa
transmittivityaaaaaaaaaa
Login to View More

Abstract

A thermoplastic composition includes from about 30 wt% to about 95 wt% poly(methyl methacrylate) (PMMA), and from about 5 wt% to about 70 wt% of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt% to about 45 wt%. A method of making a thermoplastic composition includes: (a) combining from about 30 wt% to about 95 wt% poly(methyl methacrylate) (PMMA) and from about 5 wt% to about 70 wt% of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt% to about 45 wt% to form a mixture; and melt processing the mixture to polymerize it and form the thermoplastic composition.

Description

technical field [0001] The present disclosure relates to thermoplastic compositions comprising poly(methyl methacrylate) and polycarbonate-siloxane copolymers. Background technique [0002] Blends of poly(methyl methacrylate) (PMMA) and polycarbonate (PC) have been the focus of much research. Attempts have been made to develop melt-processible transparent PMMA-PC blends with increased glass transition temperature (Tg), but have been largely unsuccessful. Such blends typically have high haze, or are opaque and immiscible. PMMA is an amorphous polymer with excellent optical properties, chemical resistance and high tensile strength, but it is also brittle, has low elongation at break and has high water absorption. Blends of PMMA and PC would be expected to have improved flexibility, which would be suitable for electronic display applications, but suitable transparent blends comprising these polymers have not yet been developed. [0003] These and other shortcomings are addre...

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): C08L33/12
CPCC08L33/12C08L2203/16C08L69/00C08L83/10C08J5/18C08J2333/12C08J2383/10C08J2433/12C08J2483/10C08L2201/08C08L2203/30
Inventor C·L·海因周昊周兵M·切拉穆图P·沃尔伦伯格
Owner SHPP GLOBAL TECH BV