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Modified PMMA optical film and preparation method thereof

An optical thin film and modification technology, which is applied in the field of PMMA optical thin film and its preparation, can solve problems such as difficulty in uniform dispersion, slow dissolution rate, and poor flatness of the film.

Active Publication Date: 2019-06-28
SHENZHEN SELEN SCI & TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, PMMA and PC are not fully compatible systems, there is interface separation, and the film prepared by the solution method is translucent or even white, which cannot meet the requirements of optical films.
On the other hand, the intrinsic viscosities of PMMA and PC differ greatly, the solubility of PC in organic solvents is low, and the dissolution rate is slow. The blend of PMMA and PC is difficult to disperse evenly during coating, and the leveling property is poor. The flatness of the film is poor and the thickness is uneven

Method used

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  • Modified PMMA optical film and preparation method thereof
  • Modified PMMA optical film and preparation method thereof
  • Modified PMMA optical film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] (1) Preparation of modified resin

[0073] Modified PMMA resin: 100 parts of PMMA resin, 6 parts of compatibilizer, and 6 parts of leveling agent. Mix the above ingredients in a high-speed mixer at a speed of 150 rpm for 30 seconds, and then fully mix them at a speed of 1100 rpm.

[0074] Modified PC resin: 100 parts of aromatic (co)polycarbonate, 20 parts of compatibilizer, and 3 parts of leveling agent. Mix the above ingredients in a high-speed mixer at a speed of 150rpm for 30s, and then fully mix them at a speed of 1100rpm. mix.

[0075] The aromatic (co)polycarbonate was vacuum-dried in an oven at 120°C for 5 hours before use, and other components were vacuum-dried in an oven at 85°C for 5 hours before use.

[0076] The PMMA resin is Asahi Kasei 80NH with a melt index of 5.5g / 10min (230°C, 2.16kg); the aromatic (co)polycarbonate contains structural unit 1,1-bis(4-hydroxyphenyl)cyclohexyl Alkanes and 3,3',5,5'-tetra-tert-butyl-2,2'-diphenol, melt index is 25g / 10mi...

Embodiment 2

[0110] (1) Preparation of modified resin

[0111] Modified PMMA resin: 100 parts of PMMA resin, 4 parts of compatibilizer, and 4 parts of leveling agent. Mix the above ingredients in a high-speed mixer at a speed of 200 rpm for 30 seconds, and then fully mix them at a speed of 1000 rpm.

[0112] Modified PC resin: 100 parts of aromatic (co)polycarbonate, 18 parts of compatibilizer, 2 parts of leveling agent, mix the above ingredients in a high-speed mixer at a speed of 200rpm for 30s, and then fully mix them at a speed of 1000rpm mix.

[0113] The aromatic (co)polycarbonate was vacuum-dried in an oven at 125°C for 4.5 hours before use, and other components were vacuum-dried in an oven at 85°C for 4.5 hours before use.

[0114] (2) Preparation of modified coating solution

[0115] Modified PMMA resin solution: In a closed reaction container, add 100 parts of dimethylacetamide, under the protection of nitrogen, carry out mechanical stirring at a temperature of 100 ° C, the rot...

Embodiment 3

[0137] (1) Preparation of modified resin

[0138] Modified PMMA resin: 100 parts of PMMA resin, 2 parts of leveling agent, mix the above ingredients in a high-speed mixer at a speed of 50 rpm for 30 seconds, and then fully mix at a speed of 500 rpm.

[0139] Modified PC resin: 100 parts of aromatic (co)polycarbonate, 10 parts of compatibilizer, mix the above components in a high-speed mixer at a speed of 50 rpm for 30 seconds, and then fully mix at a speed of 500 rpm.

[0140]The PMMA resin is LG Chemical HP210 with a melt index of 10g / 10min (230°C, 2.16kg); the aromatic (co)polycarbonate is a compound containing 4,4'-(1,4-phenylene diiso Propyl) homopolymer of diphenol, melt index is 60g / 10min (330 ℃, 2.16kg), weight-average molecular weight Mw=10000g / mol; Described compatibilizer comprises PMMA-g-(St-co-AN) , the mass ratio of PMMA-g-(MAH-co-St) is 1:1, and the composite grafting rate is 5%, St: AN=2:1, MAH: St=0.5:1; The leveling agent is fluorinated polyethylene with a w...

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Abstract

The invention provides a modified PMMA optical film. The modified PMMA optical film contains the following components in parts by mass: 60-80 parts of PMMA resin, 20-40 parts of aromatic (co)polycarbonate and 5-14 parts of a compatibilizer, 0.5-8 parts of a flatting agent. The modified PMMA optical film has a flat and smooth surface, is uniform in thickness, high in light transmittance, low in haze level, colorless and transparent and has good heat resistance and tenacity. The invention further provides a preparation method of the modified PMMA optical film. The preparation method comprises the steps of sequentially preparing modified resin and modified coating liquid, forming a film through coating, and carrying out thermal stretch formation and the like. The method is simple in process,easy for industrial production and can be used for preparing the ultrathin and high-transparency modified PMMA optical film.

Description

technical field [0001] The invention relates to the field of optical thin films, in particular to a PMMA optical thin film and a preparation method thereof. Background technique [0002] PMMA has very high light transmittance, extremely low light absorbance, high mechanical strength and good chemical stability, and is one of the most ideal optical materials. However, the glass transition temperature of traditional PMMA resin is less than 110 ° C, poor high temperature resistance, high hardness, poor toughness, easy to be brittle in processing engineering, and can not achieve ultra-thinning. PC resin is also a commonly used optical material, with high light transmittance and high glass transition temperature. After blending PC and PMMA, it can significantly improve the toughness and high temperature resistance of PMMA film, and reduce water absorption. However, on the one hand, PMMA and PC are not fully compatible systems, and there is interface separation. The film prepared...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L33/12C08L69/00C08L51/00C08L51/08C08L23/28
Inventor 胡树王佩瑶郑露孙立民
Owner SHENZHEN SELEN SCI & TECH CO LTD
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