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Benzo[c]pyrrolidone copolycarbonate optical articles, articles formed therefrom, and methods of making the same

A technology of pyrrolidone carbonate and copolycarbonate, applied in optics, optical components, optical components, etc.

Active Publication Date: 2022-06-28
SHPP GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Finally, depending on the application, higher levels of ultraviolet (UV) stability may be required

Method used

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  • Benzo[c]pyrrolidone copolycarbonate optical articles, articles formed therefrom, and methods of making the same
  • Benzo[c]pyrrolidone copolycarbonate optical articles, articles formed therefrom, and methods of making the same
  • Benzo[c]pyrrolidone copolycarbonate optical articles, articles formed therefrom, and methods of making the same

Examples

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Embodiment 1-21

[0142] Various copolycarbonates were prepared from the monomers shown in Table 2. Addition times are given in % of phosgene. Glass transition temperature, weight average molecular weight (g / mol), hydrolytic stability (Mw loss) and UV resistance were tested. The results are summarized in Tables 2 and 3 and figure 1 and 2 middle.

[0143] Table 2.

[0144]

[0145]

[0146] The total molar percentage of benzo[c]pyrrolone monomer, high heat bisphenol monomer and BPA monomer is 100%.

Embodiment 47-104

[0156] Tables 4-9 show copolycarbonates with high glass transition temperatures and improved hydrolytic stability.

[0157]Molecular models were used to calculate Tg as well as viscosity, refractive index (RI), modulus and fracture stress. The model used to calculate all properties except flow uses the following method. First, the repeating unit geometry was optimized using the Dreiding force field (J. Phys. Chem. 94(26)(1990): pp. 8897-8909). Once the geometry is optimized, the backbone (ie, identification of side groups and atoms) is defined. The above properties are calculated using the concept of a connectivity index, as opposed to the most common theoretical approach (see Ind.Eng.Chem.Res.38(1999):1884-1892; Prediction of polymer properties. CRC Press, 2002; Properties of polymers : their correlation with chemical structure; their numerical estimation and prediction from additive group contributions. (Elsevier, 2009; and Polymer 45(26)(2004):8651-8659)). This means tha...

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Abstract

Copolycarbonate optical articles include polycarbonate compositions comprising: a copolycarbonate having: 2 to 60 mole percent benzo[c]pyrrolidone carbonate units, 2 to 90 mole percent refractory carbonate units, and optionally 2 to 60 mol% of bisphenol A carbonate units. The copolycarbonate has less than 100 ppm of each of benzo[c]pyrrolidone, high-heat bisphenol, and bisphenol A monomer, and less than 5 ppm of each ion, and is composed of monomers each having a purity of at least 99.6% preparation. The polycarbonate composition has a glass transition temperature of 200° C. to 200° C. and a yellowness index of less than 30.

Description

Background technique [0001] The present disclosure relates generally to polycarbonate optical articles, and more particularly to copolycarbonate optical lenses, methods of making the same, and uses thereof. [0002] Polycarbonate can be used to manufacture articles and assemblies for a wide range of applications, from automotive parts to electronic devices. Due to its wide range of uses, especially in lenses used or assembled in high heat environments, it is desirable to provide polycarbonates that have high transmittance and low chromaticity and that can withstand high temperatures without deformation or discoloration. Furthermore, it may be desirable to be able to tune the refractive index of the material depending on the application. Finally, depending on the application, higher levels of ultraviolet (UV) stability may be required. [0003] Accordingly, there remains a need for polycarbonates with an improved balance of high thermal and optical properties. It would be a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G64/12C08G64/30G02C7/04G02B1/04
CPCC08G64/12C08G64/307G02B1/041G02B1/043C08L69/00
Inventor 保罗·迪安·西贝特赵炜马克·阿德里安乌斯·约翰内斯·范·德·梅舒巴施里·斯瓦米纳坦杰基索尔·帕尔乔迪·卡尔韦拉斯瓦伊迪亚纳特·拉玛克里希南
Owner SHPP GLOBAL TECH BV
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