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Polycarbonate-polysiloxane copolymer compositions, articles formed therefrom, and methods of making the same

A polycarbonate and polysiloxane block technology, applied in the field of polycarbonate-polysiloxane copolymer compositions, can solve the problems of poor aesthetics of molded parts and the like

Active Publication Date: 2019-06-28
SHPP GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, blends of polycarbonate homopolymers with such polycarbonate-polysiloxanes can lead to molded parts with poor aesthetics

Method used

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  • Polycarbonate-polysiloxane copolymer compositions, articles formed therefrom, and methods of making the same
  • Polycarbonate-polysiloxane copolymer compositions, articles formed therefrom, and methods of making the same
  • Polycarbonate-polysiloxane copolymer compositions, articles formed therefrom, and methods of making the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4 and comparative example 5-8

[0095] Exemplary compositions of the present disclosure (E1-4) and control or comparative compositions (CE5-8) are shown in Table 3. Flow, impact and haze properties were evaluated for each sample and the results are shown in Table 3. The levels of PC1 and PC2 were chosen such that the MVR of the composition was in the range of about 8-11 (except CE7).

[0096] table 3

[0097]

[0098]

[0099] *Ratios refer to the weight ratio of SiPC5 relative to a different second SiPC

Embodiment 9-12 and comparative example 13 and 14

[0104] Examples 9-12 illustrate combinations comprising PC, SiPC5 and a second SiPC (selected from SiPC1 and SiPC2 with high siloxane content (40%)) where the weight ratio of SiPC5 to second SiPC is equal to or greater than 10 impact resistance, chemical resistance and aesthetics of the material. The second SiPC in Comparative Example 13 was SiPC3, which contained 20% siloxane. The results are shown in Table 4. The PC1 and PC2 contents are selected such that the MVR of the composition is in the range of about 8-11.

[0105] Table 4.

[0106]

Embodiment approach 1

[0112] Embodiment 1. A polycarbonate composition comprising: a first poly(carbonate-siloxane) copolymer comprising polysiloxane blocks having an average block length of 10 to 100, and The total weight of poly(carbonate-siloxane) copolymer, the siloxane content of 5wt% to 10wt%; And second poly(carbonate-siloxane) copolymer, it comprises the average block length of 10 to 100 polysiloxane blocks and a siloxane content of 30 wt % to 60 wt % based on the total weight of the second poly(carbonate-siloxane) copolymer; wherein the first poly(carbonate-siloxane) ) copolymer to the second poly(carbonate-siloxane) copolymer in a weight ratio of greater than or equal to 2 to less than 8; and bisphenol A homopolycarbonate, wherein the polycarbonate composition has A total silicone content of 2.5 wt% to 10 wt%; and a 1 mm thick molded part comprising the composition has a haze of less than 10% measured by HazeGard (ASTM D1003-00). Embodiment 2. The composition according to embodiment 1, w...

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Abstract

A polycarbonate composition comprising: a first poly(carbonate-siloxane) copolymer comprising polysiloxane blocks having an average block length of 10 to 100, and 5 wt% to 10 wt% siloxane alkane content; and a second poly(carbonate-siloxane) copolymer comprising polysiloxane blocks with an average block length of 10 to 100, and a siloxane content of 30 wt% to 60 wt%, wherein the second a poly(carbonate-siloxane) copolymer to a second poly(carbonate-siloxane) copolymer in a weight ratio of greater than or equal to 2 to less than 8; and bisphenol A homopolycarbonate, wherein based on the The total siloxane content of the polycarbonate composition is from 2.5 wt% to 10 wt% of the total weight of the composition; and the haze of a molded part of 1 mm thickness is less than 10 as measured by HazeGard (ASTM D1003‑00). %.

Description

technical field [0001] The present disclosure relates to polycarbonate compositions, articles formed therefrom and methods of making the same, and in particular to polycarbonate-polysiloxane having advantageous properties such as improved aesthetic properties, good impact, or desirable chemical resistance alkane copolymer composition. Background technique [0002] Polycarbonate homopolymers and polycarbonate copolymers are useful in a variety of applications, at least in part because of their good balance of properties, such as plasticity, heat resistance, and impact properties, among others. Despite extensive research into these materials over the years, there remains a need in the art for improved polycarbonate compositions that meet increasingly stringent industry standards. [0003] For example, polycarbonate-polysiloxane copolymers can have good mechanical properties and low temperature impact resistance. However, blends of polycarbonate homopolymers with such polycar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08L83/10C08G64/18C08G77/448
CPCC08G77/448C08L83/10C08L69/00C08L2205/03C08L2205/025
Inventor 詹姆斯·富兰克林·胡韦尔拉蒙·赫罗特罗伯特·迪尔克·范·德·格兰佩尔马克·阿德里安乌斯·约翰内斯·范·德·梅雷姆科·维尔茨杨剑张军华
Owner SHPP GLOBAL TECH BV