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Scratch resistant pmma and polycarbonate-siloxane copolymer compositions

A thermoplastic composition and copolymer technology, applied in the field of scratch-resistant thermoplastic composition, can solve the problems of high cost secondary operation and the like

Inactive Publication Date: 2020-10-30
SHPP GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these coatings are used whenever required, they add a costly secondary operation to the part manufacturing process and are therefore less preferred

Method used

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  • Scratch resistant pmma and polycarbonate-siloxane copolymer compositions
  • Scratch resistant pmma and polycarbonate-siloxane copolymer compositions
  • Scratch resistant pmma and polycarbonate-siloxane copolymer compositions

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Embodiment

[0128] The following examples are presented to provide one of ordinary skill 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 exemplary only, and not intended to Limit this 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. Percentages referring to components are in wt% unless otherwise stated.

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Abstract

The present invention relates to a scratch resistant pmma and polycarbonate-siloxane copolymer compositions. The thermoplastic compositions include: from about 62 wt% to about 99 wt% poly(methyl methacrylate) (PMMA) or copolymers thereof; and from about 1 wt% to about 38 wt% of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt% to about 45 wt%. The compositions arescratch resistant. Scratch resistance may be determined as comprising a scratch depth of less than 20 micron ([mu]m) as measured in accordance with the Erichsen scratch hardness test at a force of 4Newton (N). Articles including the thermoplastic composition are also described.

Description

technical field [0001] The present disclosure relates to scratch resistant thermoplastic compositions comprising poly(methyl methacrylate) and polycarbonate-siloxane copolymers. Background technique [0002] Polymethyl methacrylate (PMMA) has become the material of choice for scratch resistance and transparent or high-gloss black thermoplastic compositions, but due to its low impact strength, it cannot be placed in demanding applications such as many kinds of automotive interiors. or external components or consumer electronics enclosures). Polycarbonate (PC) has superior impact strength and clarity, but in its basic form (bisphenol A polycarbonate homopolymer), it lacks scratch resistance. Allegedly Durabio TM The polymer (Mitsubishi) combines some of the favorable properties of PC with those of PMMA. [0003] An effective technique for improving scratch resistance is hard coating. Although these coatings are used whenever needed, they add a costly secondary operation to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08L69/00C08L83/10
CPCC08L33/12C08L69/00C08L83/10C08L2666/14C08L83/04C08L2201/10C08L2203/16
Inventor P·沃伦伯格C·卢克H·周M·范德尔梅
Owner SHPP GLOBAL TECH BV
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