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

Polymethacrylate composition and protective film for protecting optical elements

A technology of polymethacrylate and alkyl methacrylate, which can be used in optical components, optics, instruments, etc., can solve problems such as poor film-forming properties, and achieve the effect of good mechanical properties

Inactive Publication Date: 2017-05-17
CHI MEI CORP
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although polymethacrylate has better moisture resistance and heat resistance, but because the material is brittle, the film-forming property is not good
Therefore, solving the problem of poor film-forming properties of polymethacrylate while maintaining good durability and transparency is the goal that the industry expects to achieve at present

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
  • Polymethacrylate composition and protective film for protecting optical elements

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0060] [Preparation Example 1] Polymethacrylate

[0061] 100 parts by weight of the mixture (containing 93.5 wt% methyl methacrylate and 6.5 wt% methyl acrylate), 0.43 parts by weight of n-dodecyl mercaptan (chain transfer agent, for molecular weight adjustment), 0.085 parts by weight of 2, After mixing 2'-azobisisobutyronitrile (initiator) and 66 parts by weight of toluene (solvent), they were continuously fed into a reaction tank for continuous solution polymerization. The reaction tank is an interlayer with hot kerosene circulation, the reaction temperature is maintained at 100° C., and the pressure is 600 torr. Then fully stir the reaction tank to mix the ingredients evenly, and heat the polymer solution to 265°C, then use a continuous devolatilization device to devolatilize the polymer solution under reduced pressure, and then make strips through extrusion equipment , Polymethyl methacrylate particles were obtained after cooling and pelletizing.

[0062] Polymethyl meth...

Embodiment 1

[0063] (Example 1) Polymethacrylate composition and molded article thereof

[0064] With 10 kilograms of polymethyl methacrylate of Preparation Example 1, add the first core-shell type particle (purchased from Mitsubishi Rayon Company, trade name IR441, hereinafter referred to as IR441) and the second core-shell particle (purchased from Kaneka Company, trade name is Kane M210, hereinafter referred to as M210), and then mixed with an extruder (supplier: Shizhou Company, model CM-PRA35) at 230° C. and extruded to obtain a polymethyl methacrylate composition. Next, an optical film forming machine (supplier: Hitachi Zosen, model 5HT65-32DVs) was used to perform a film forming process at 200° C. to obtain a polymethyl methacrylate composition molded product with a thickness of 60 μm.

Embodiment 2 to 4 and comparative example 1 to 7

[0066] In addition to adjusting the composition and its content according to the following Table 1, the remaining process steps and conditions are the same as in Example 1, and finally the polymethyl methacrylate compositions of Examples 2 to 4 and Comparative Examples 1 to 7 are respectively prepared. Taste.

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
glass transition temperatureaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a polymethacrylate composition and a protective film for protecting optical components. The polymethacrylate composition contains 70-90 parts by weight of polymethacrylate, 5-17.5 parts by weight of first shell-core type particles and 2.5-15 parts by weight of second shell-core type particles. Each first shell-core type particle contains a first shell formed from material containing alkyl methacrylate monomeric units and a first core formed from material containing alkyl acrylate monomeric units and ethene series unsaturated monomeric units. Each second shell-core type particle contains a second shell and a second core formed from material containing alkyl methacrylate monomeric units. The invention also provides the protective film having excellent mechanical strength and proper haze and used for protecting optical components.

Description

technical field [0001] The invention relates to a polymethacrylate composition, in particular to a polymethacrylate composition used for making a protective film for protecting optical elements. Background technique [0002] In recent years, along with the development of thin and lightweight notebook computers, the demand for thinner and higher performance of polarizer protective films used in display devices such as liquid crystal display devices has also increased. Polarizers are generally made by stretching iodine-containing polyvinyl alcohol film; however, the mechanical strength of this kind of polarizer is not good, and two protective films are usually used to protect and improve durability and mechanical strength at the same time. The most widely used polarizer protective film is cellulose triacetate film. [0003] As liquid crystal display devices are more widely used in environments, polarizers are also required to have heat resistance in high-temperature environme...

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 Patents(China)
IPC IPC(8): C08L33/12C08L51/00G02B1/14
Inventor 许顺益郭铭洲
Owner CHI MEI CORP