WO2014201727A1 - 用于液晶显示器边框的高分子液晶材料、边框和制造方法 - Google Patents
用于液晶显示器边框的高分子液晶材料、边框和制造方法 Download PDFInfo
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- WO2014201727A1 WO2014201727A1 PCT/CN2013/078539 CN2013078539W WO2014201727A1 WO 2014201727 A1 WO2014201727 A1 WO 2014201727A1 CN 2013078539 W CN2013078539 W CN 2013078539W WO 2014201727 A1 WO2014201727 A1 WO 2014201727A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
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- C—CHEMISTRY; METALLURGY
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/38—Polymers
- C09K19/3804—Polymers with mesogenic groups in the main chain
- C09K19/3809—Polyesters; Polyester derivatives, e.g. polyamides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/52—Polycarboxylic acids or polyhydroxy compounds in which at least one of the two components contains aliphatic unsaturation
- C08G63/54—Polycarboxylic acids or polyhydroxy compounds in which at least one of the two components contains aliphatic unsaturation the acids or hydroxy compounds containing carbocyclic rings
Definitions
- the present invention relates to a liquid crystal device, and more particularly to a polymer liquid crystal material for a frame of a liquid crystal display and a frame and a manufacturing method of the display.
- liquid crystal display devices LCDs
- PDPs plasma display devices
- OLED displays OLED displays
- TFT-LCD itself has also begun to be challenged by new display technologies.
- TFT-LCD itself has some innate shortcomings. With the development of technology, these shortcomings are increasingly challenged and increasingly unable to be used by consumers. And accepted by technology trends. Compared with OLED, TFT-LCD mainly has the following problems:
- the lower aperture ratio further reduces the energy utilization rate; the rapid development of TFT-LCD is related to its more based on amorphous silicon platform (of course, a small part of the product also uses polysilicon), and the price is cheap. Simple, uniform, so there are now 55-inch, 65-inch and other large-sized products. After the size is large, the impedance of the line rises, and it is necessary to use thicker, thicker or more conductive metal wiring. The thickness cannot be increased indefinitely.
- the best conductivity materials are metallic silver and copper. The better practical conductive materials are estimated to have no breakthrough for a long time, and only the line width can be increased. The aperture ratio of the TFT-LCD is lowered.
- the acceptable ambient temperature is relatively narrow, mainly because the liquid crystal state can only exist in a narrow temperature range; in general, there is a liquid crystal that can be used for TFT-LCD between -20 degrees and 70 degrees. Phase materials, some special occasions, also use -30 degrees ⁇ 100 degrees of liquid crystal material, but this is basically reaching the limit, in some special occasions, such as the North and South, aerospace, higher temperature environment, LCD The display is not very good.
- the response speed is slow; because it is not self-illuminating, but through the liquid crystal as a light valve to control the passage and blocking of light, the response speed of the liquid crystal is very important, but because the liquid crystal itself has a high viscosity, especially vertical Negative liquid crystal for alignment, so the response speed can only be achieved in milliseconds, which is difficult to compare with the speed of OLED microseconds.
- Large frame Because the alignment film and liquid crystal are used, the frame should be sealed with the frame material. At the same time, the border of the TFT-LCD needs to be small. The minimum frame of energy production is about 4mm.
- the frame material of the liquid crystal display is mostly a mixture of polyepoxy resin, cellulose, diatomaceous earth, ultraviolet initiator, and ultraviolet terminator, wherein polyepoxy resin, ultraviolet initiator, etc. all pollute the liquid crystal.
- Oxygen of epoxy resin has a P-orbital electron pair and has a small steric hindrance, which forms a complex with the benzene ring in the liquid crystal molecule, changing the state of the liquid crystal phase, resulting in uneven brightness on the display, resulting in various traces.
- the phenomenon In order to reduce this trace, it is desirable that the frame material can reach a certain degree of polymerization before it comes into contact with the liquid crystal in the display area. To achieve this, the liquid crystal must reach a certain distance from the frame material. Even so, there are still some close areas. Pollution.
- TFT-LCD has more mature production technology than OLED, has a more mature and stable supply chain, and has a more competitive cost advantage, so for a long time later.
- TFT-LCD is also the mainstream of display technology.
- the present invention provides a polymer liquid crystal material for a frame of a liquid crystal display, which is obtained by crosslinking and polymerizing a group having a terephthalic acid group and an alcohol having a carbon-carbon double bond, wherein the belt
- the group of terephthalic acid is any one of terephthalic acid, ortho-alkyl terephthalic acid or meta-alkyl terephthalic acid
- the carbon-carbon double-bonded alcohol is vinyl Any one of an alcohol, an alkyl group-containing vinyl alcohol or a conjugated vinyl alcohol.
- the terephthalic acid-containing group is terephthalic acid
- the carbon-carbon double bond-containing alcohol is vinyl alcohol, which is obtained by crosslinking and polymerizing terephthalic acid and vinyl alcohol.
- the molecular formula of the object is:
- the terephthalic acid-containing group is terephthalic acid
- the carbon-carbon double bond-containing alcohol is an alkyl group-containing vinyl alcohol, which is composed of terephthalic acid and an alkyl group-containing vinyl group.
- the alcohol is cross-linked and polymerized, and a branched alkyl group is added to the alkyl chain.
- the molecular formula of the polymer is -
- the terephthalic acid-bearing group is an ortho-alkyl-terminated phthalic acid
- the carbon-carbon double-bonded alcohol is B.
- An alkenyl alcohol obtained by crosslinking and polymerizing an ortho-alkyl terephthalic acid and a vinyl alcohol, and adding a branched alkyl group to the benzene ring, the molecular formula of the polymer is:
- R and R' are straight-chain alkyl groups having 1 to 3 carbons in a straight chain, and R and R' are -C3 ⁇ 4 or -C3 ⁇ 4-C3 ⁇ 4, and the degree of polymerization n is 50-1000. .
- the present invention also provides a liquid crystal display frame of a polymer liquid crystal material, wherein the polymer liquid crystal material is formed by cross-linking polymerization of a group having a terephthalic acid group and an alcohol having a carbon-carbon double bond, wherein, the polymerization
- the degree n is from 50 to 1000, preferably the degree of polymerization n is from 500 to 600
- the auxiliary material is one or more selected from the group consisting of cellulose, glass fiber, diatomaceous earth and ultraviolet initiator.
- the present invention also provides a method for manufacturing a bezel of a liquid crystal display, comprising the steps of:
- Step 1) the ratio of the terephthalic acid-bearing group and the carbon-carbon double bond-containing alcohol molar ratio of 1:1 to a reaction temperature of 60-100 degrees to obtain a polymer;
- Step 2 cooling the obtained polymer to a temperature of 35 to 40 degrees to prevent the reactants remaining in the reaction from continuing to react, resulting in an increase in molecular weight;
- Step 3 vacuum drying to remove unreacted alcohol, the degree of vacuum is -0.1 atm;
- Step 4) After initial filtration, it is placed in a centrifuge to separate the small molecule material from the polymer of the desired degree of polymerization to obtain the desired polymer capable of fabricating the frame of the liquid crystal display.
- the present invention provides a polymer material obtained by polycondensation of a terephthalic acid group and a carbon-carbon double bond as a frame material of a liquid crystal display, instead of the original poly Epoxy resin, which improves the steric hindrance between molecules, avoids the reaction with liquid crystal small molecules to form a complex, and has strong stability, so that it can be at a certain molecular weight. It does not form a solid state, enhances its flexibility, and facilitates the coating process.
- the melting point of the polymer can be lowered, the glass transition temperature can be lowered, and the weather resistance can be improved. Maintain a certain level of physical stability under severe temperature changes. Since the frame material is close to the composition of the liquid crystal molecules, it does not cause contamination, and therefore, the size of the display frame can be reduced.
- the material for preparing the frame of the liquid crystal display, in order to replace the existing polyepoxy material, the present invention provides a polymer liquid crystal material which is composed of a group having terephthalic acid and an alcohol having a carbon-carbon double bond. Copolymerized, wherein the terephthalic acid-containing group is any one of terephthalic acid, ortho-alkyl terephthalic acid or meta-alkyl terephthalic acid;
- the alcohol having a carbon-carbon double bond is any one of a vinyl alcohol, an alkyl group-containing vinyl alcohol or a conjugated vinyl alcohol.
- the polymer liquid crystal material can reduce the contamination of the liquid crystal by the frame, expand the acceptable ambient temperature range, and increase the width of the frame.
- a polymer liquid crystal material for a frame of a liquid crystal display which is obtained by cross-linking polymerization of terephthalic acid and vinyl alcohol, and the molecular formula of the polymer is:
- the condensation reaction of benzene is carried out, and by controlling the degree of polymerization, a polymer having a desired molecular weight is obtained, and a carbon-carbon double bond is added to the alkyl chain of the original polymer.
- the auxiliary part may be cellulose, glass fiber, diatomaceous earth or the like, and an appropriate amount of ultraviolet initiator may be added as needed.
- a polymer liquid crystal material for a frame of a liquid crystal display which is obtained by crosslinking and polymerizing terephthalic acid and an alkyl alcohol-containing vinyl alcohol.
- the molecular formula of the polymer is:
- the use of p-phenylene The polycondensation reaction is carried out, and a polymer having a desired molecular weight is obtained by controlling the degree of polymerization, and a carbon-carbon double bond and a branched alkyl group are added to the alkyl chain of the original polymer, electron clouds are increased, the degree of conjugation is increased, and the rigidity of the alkyl primary bond is increased. Increasing, the stretching molar amount is increased, thereby increasing the brittleness of the polymerization degree, and at the same time, the action of the branched alkyl group can further lower the melting point of the polymer, and is convenient for coating.
- the auxiliary part may be cellulose, glass fiber, diatomaceous earth or the like, and an appropriate amount of ultraviolet initiator may be added as needed.
- a polymer liquid crystal material for a frame of a liquid crystal display which is obtained by crosslinking and polymerizing an alkyl terephthalic acid and a vinyl alcohol, and the molecular formula of the polymer is:
- the ortho-position of a pair of terephthalic acid, the corresponding alcohol is used.
- Performing a polycondensation reaction obtaining a polymer of a desired molecular weight by controlling the degree of polymerization, adding a carbon-carbon double bond to the alkyl chain of the original polymer, and adding a branched alkyl group to the benzene ring to make the polymer vitrified
- the temperature is lowered, the weather resistance is improved, and the change in the ambient temperature is made more, and the action of the branched alkyl group can further lower the melting point of the polymer, facilitate coating, and does not cause difficulty in carbon-carbon double bond polymerization.
- the auxiliary part may be cellulose, glass fiber, diatomaceous earth or the like, and an appropriate amount of ultraviolet initiator may be added as needed.
- a polymer liquid crystal material for a frame of a liquid crystal display which is obtained by crosslinking and polymerizing an alkyl terephthalic acid and a conjugated vinyl alcohol, and the molecular formula of the polymer is:
- ortho-terephthalic acid and conjugated vinyl alcohol are employed.
- the action of the alkyl group and the branched alkyl group can further lower the melting point of the polymer, and is convenient for coating.
- the reaction activation energy of the carbon-carbon conjugated double bond is significantly lower than that of the carbon-carbon double bond, which facilitates the excitation reaction.
- the auxiliary part may be cellulose, glass fiber, diatomaceous earth or the like, and an appropriate amount of ultraviolet initiator may be added as needed.
- R and R' are linear alkyl groups having from 1 to 3 carbons in a straight chain.
- said R and R' are -C3 ⁇ 4 or -C3 ⁇ 4-C3 ⁇ 4.
- the polymer liquid crystal material polymer has a polymerization degree n of 50 to 1,000, preferably a polymerization degree n of 500 to 600. The polymerization degree is adjusted by adjusting the reaction time, the reaction temperature, the selection and amount of the catalyst, etc., to obtain polymerization products of different molecular weights.
- a modification reaction is carried out on the benzene ring and the alkyl group of the original polymer. If a carbon-carbon double bond is added to the alkyl group, the steric hindrance between the molecule and the molecule is increased by increasing the double bond, so that When polymerized to molecular weight, it does not form a solid state, increasing the viscosity of the polymer; if the branched alkyl group is further added to the alkyl chain to further lower the melting point of the polymer, it is convenient to be used in the coating process; if on the benzene ring Further, the branched alkyl group is further increased to lower the melting point of the polymer, and is easily polymerized with carbon-carbon double bonds; if a carbon-carbon conjugated double bond is added to the alkyl chain to lower the reaction activation energy of the polymer, the reaction is facilitated.
- the viscosity and weather resistance of the polymer liquid crystal material are enhanced by the carbon-carbon double bond, so that it does not form a solid state under a certain molecular weight state, and at the same time, due to the presence of carbon-carbon double bonds.
- the cross-linking polymerization is carried out by subsequent irradiation of ultraviolet light and heating to form a bezel material which satisfies the requirements in terms of strength and coatability.
- the present invention also provides a method for manufacturing a bezel of a liquid crystal display, comprising the steps of:
- Step 1) Mixing terephthalic acid and alcohol in a molar ratio of 1:1, the reaction temperature is 60-100 degrees,
- Step 2 rapidly cooling the obtained polymer by circulating water cooling to a temperature of 35-40 degrees, preferably 38 degrees, to prevent the reactants remaining in the reaction from continuing to react, controlling the increase in molecular weight, and controlling the degree of polymerization of the polymer;
- Step 3) Vacuum drying to remove unreacted alcohol, the degree of vacuum is -0.1 atm, in order to control the reaction rate is not too intense, if too strong, the molecular weight uniformity will be reduced, generally the vacuum is not high, generally slightly lower than atmospheric pressure
- Step 4) After initial filtration, place it in a centrifuge to separate the small molecule material from the polymer of the desired degree of polymerization. Obtain the desired polymer that can be used to make the frame of the LCD.
- Different polymer liquid crystal materials can be synthesized by changing monomers to modify them to obtain a polymer material suitable for manufacturing polymer liquid crystal frame, which replaces the existing polyepoxy resin, and its physicochemical properties and liquid crystal
- the molecules are closer to each other and are also a liquid crystal material, so the contamination of the small molecule liquid crystal encapsulated therein is lowered, so that the size of the frame material can be reduced.
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Abstract
本发明提供一种用于液晶显示器边框的高分子液晶材料,其由带对苯二甲酸的基团和带碳碳双键的醇交联聚合而成,其中,所述带对苯二甲酸的基团为对苯二甲酸、邻位烷基-对苯二甲酸或间位烷基-对苯二甲酸中任选一种;所述带碳碳双键的醇为乙烯基醇、带烷基的乙烯基醇或共轭乙烯基醇中任选一种。所述高分子液晶材料提高了分子间的空间位阻,避免了其与液晶小分子发生反应形成配合物,稳定性强,使其在一定分子量下,不会形成固态,提升其柔性,有利于涂布工艺;另通过在苯环或支链烷基上加入烷基,可降低聚合物的熔点,降低玻璃化温度,提升其耐候性,使其在剧烈的温度变化状况下保持一定的物化稳定性。
Description
用于液晶显示器边框的高分子液晶材料、 边框和制造方法
技术领域
本发明涉及一种液晶装置, 尤其是指一种用于液晶显示器边框的高分子液晶材料以及显 示器的边框和制造方法。
背景技术
随着信息社会的发展, 人们对显示设备的需求得到了增长, 为了满足这种需求, 最近几 种平板显示设备, 比方说: 液晶显示器件 (LCD), 等离子体显示器件 (PDP), OLED 显示 器件都得到了迅猛的发展。 在平板显示器件当中, 液晶显示器件由于其重量低、 体积小、 能 耗低的优点, 已经基本取代了冷阴极显示设备。
但是, TFT-LCD本身也开始受到新的显示技术的挑战, 比如 TFT-LCD本身还有一些先 天的缺点, 随着技术的发展, 这些缺点越来越受到挑战, 越来越不能被消费者, 及技术发展 趋势所接受。 相对于 OLED, TFT-LCD主要有以下的一些问题:
1 ) 被动发光, 所以无论是黑画面还是白画面, 背光都要一直亮着, 能源消费高; 在 TFT-LCD中, 液晶只是作为一个光阀来控制光线的穿过与阻隔, 本身并没有发光, 所以无论 是黑画面还是亮画面背光都必须打开;虽然在 TFT-LCD中,提出了区域点亮 (Local Dimming) 技术, 但是其算法负责, 无法适用于大多数显示画面, 容易出现一些显示不均区域点亮, 而 且即使使用, 背光也无法真正关闭, 还是有一些能量消耗的。
2) 开口率较低, 进一步降低了能源的利用率; TFT-LCD之所以能迅猛发展, 和其更多 的基于非晶硅平台有关(当然很小一部分产品也使用多晶硅), 价格便宜, 工艺简单, 均一性 较好, 所以现在出现了 55英寸, 65英寸等大尺寸的产品, 尺寸大了以后, 线路的阻抗上升, 就需要用更粗、 更厚或者导电率更好的金属配线, 厚度是无法无限度增加的, 导电率最好的 材料是金属银和铜, 更好的实用的导电材料估计在很长时间内都不会有突破, 那就只能增加 线宽了, 这进一步降低了 TFT-LCD的开口率。
3 ) 可以接受的环境温度比较窄, 主要因为液晶态只能在很窄的一个温度区间内才存在; 一般说来, 在 -20度〜 70度之间才有可以用于 TFT-LCD的液晶相材料, 一些特殊场合, 也在 使用 -30度〜 100度的液晶材料, 但这基本上已经快到极限了, 在一些特殊的场合, 比如南北 极, 航空航天, 温度较高的环境, 液晶显示就显得不是很好了。
4) 响应速度慢; 因为其不是自发光, 而是通过液晶作为光阀来控制光的通过与阻断, 所 以液晶的响应速度就非常重要, 但是由于液晶本身有较高的黏度, 特别是垂直配向用的负性 液晶, 所以响应速度只能做到毫秒的级别, 很难和 OLED微秒的速度相比。
5 ) 边框较大:因为使用了配向膜和液晶, 边框要用边框材密封, 同时需要背光 TFT-LCD 的边框无法变得很小, 目前能量产的最小边框也就 4mm左右。
目前, 液晶显示器的边框材料多为聚环氧树脂, 纤维素, 硅藻土, 紫外引发剂, 紫外终 止剂的混合体, 其中, 聚环氧树脂, 紫外引发剂等都会污染到液晶。 环氧树脂的氧由于存在 P 轨道电子对, 且空间位阻较小, 会和液晶分子中的苯环形成配合物, 改变液晶相的状态, 从而导致显示上的亮度不均匀, 造成各种痕迹的现象。 为了降低这种痕迹, 希望边框材料在 和显示区的液晶接触以前, 就能达到一定的聚合度, 为了达到这个目的, 液晶距离边框材要 达到一定的距离, 即使这样, 靠近的区域还是有一些污染。
这些缺点基本上都是 OLED的优点,但是 TFT-LCD相对于 OLED有更成熟的生产技术, 有更成熟和稳定的供应链, 有更具有竞争力的成本优势, 所以在后面相当长的时间内, TFT-LCD还是显示技术的主流, 针对上述的几个缺点, 希望通过在材料技术上作一些探讨和 改进, 使用新高分子液晶材料做边框材料, 其本身也是一种液晶所以对面内的小分子液晶的 污染降低, 达到降低液晶显示器件边框的目的。
发明内容
为了实现上述目的, 本发明提供一种用于液晶显示器边框的高分子液晶材料, 其由带对 苯二甲酸的基团和带碳碳双键的醇交联聚合而成, 其中, 所述带对苯二甲酸的基团为对苯二 甲酸、 邻位烷基一对苯二甲酸或间位烷基一对苯二甲酸中任选一种; 所述带碳碳双键的醇为 乙烯基醇、 带烷基的乙烯基醇或共轭乙烯基醇中任选一种。
优选地, 所述带对苯二甲酸的基团为对苯二甲酸, 所述带碳碳双键的醇为乙烯基醇, 其 由对苯二甲酸和乙烯基醇交联聚合而成, 聚合物的分子式为:
优选地, 所述带对苯二甲酸的基团为对苯二甲酸, 所述带碳碳双键的醇为带烷基的乙烯 基醇, 其由对苯二甲酸和带烷基的乙烯基醇交联聚合而成, 烷基链上增加支链烷基, 聚合物 的分子式为-
本发明还提供了一种高分子液晶材料的液晶显示器边框, 其中, 所述高分子液晶材料由 带对苯二甲酸的基团和带碳碳双键的醇交联聚合而成, 其中, 聚合度 n值为 50-1000, 优选聚 合度 n值为 500-600, 辅料为纤维素、 玻璃纤维、 硅藻土、 紫外线引发剂中任选一种或多种。
本发明还提供了一种用于制造液晶显示器边框的方法, 其包括以下步骤:
步骤 1 )将带对苯二甲酸的基团和带碳碳双键的醇按摩尔比 1 : 1配比,反应温度为 60-100 度, 获得聚合物;
步骤 2)将所获得的聚合物冷却至温度为 35-40度, 防止反应残余的反应物继续反应, 造 成分子量上升;
步骤 3 ) 抽真空干燥去除没有反应的醇, 真空度为 -0.1大气压;
步骤 4) 经初滤后, 将其放入离心机内将小分子物质和所需聚合度的聚合物分离出来, 获得所需的可制造液晶显示器边框的聚合物。
与现有技术相比, 本发明提供了一种由带对苯二甲酸基团和带碳碳双键的醇缩聚合成的 高分子聚合物材料作为液晶显示器的边框材料, 替代了原有的聚环氧树脂, 提高了分子间的 空间位阻, 避免了其与液晶小分子发生反应形成配合物, 稳定性强, 使其在一定分子量下,
不会形成固态, 提升其柔性, 有利于涂布工艺; 另通过在苯环或支链烷基上加入烷基, 可降 低聚合物的熔点, 降低玻璃化温度, 提升其耐候性, 使其在剧烈的温度变化状况下保持一定 的物化稳定性。 由于边框材料与液晶分子的组成相接近, 不会对其造成污染, 因此, 可减小 显示器边框的尺寸。
具体实施方式
用于制备液晶显示器边框的材料, 为了替代现有的聚环氧树脂材料, 本发明提供了一种 高分子液晶材料, 其由带对苯二甲酸的基团和带碳碳双键的醇交联聚合而成, 其中, 所述带 对苯二甲酸的基团为对苯二甲酸、 邻位烷基一对苯二甲酸或间位烷基一对苯二甲酸中任选一 种; 所述带碳碳双键的醇为乙烯基醇、 带烷基的乙烯基醇或共轭乙烯基醇中任选一种。 所述 高分子液晶材料可降低边框对液晶的污染, 扩大可接受的环境温度范围, 使得边框宽度增大。
实施例一
在本实施例中, 提供了一种用于液晶显示器边框的高分子液晶材料, 由对苯二甲酸和乙 烯基醇交联聚合而成, 其聚合物的分子式为:
在烷基上接入一个碳碳双键, 可增加聚合反应时, 分子和分子之间的空间位阻, 使其在 一定分子量下, 不会形成固态, 增加其柔性, 有利于粘结使用。 同时, 由于双键的存在, 可 通过后续照射紫外光和加热的方式来进行交联聚合, 形成在强度和涂布性上都能满足要求的 边框封装胶。
辅助部分可采用纤维素、 玻璃纤维、 硅藻土等, 还可根据需要添加适量的紫外引发剂。
实施例二
在本实施例中, 提供了一种用于液晶显示器边框的高分子液晶材料, 由对苯二甲酸和带 烷基的乙烯基醇交联聚合而成, 其聚合物的分子式为:
优选地, 采用对苯二
进行缩 聚反应, 通过控制聚合度获得所需分子量的聚合物, 在原有聚合物的烷基链上增加碳碳双键 和支链烷基, 电子云增加, 共轭程度增加, 烷基主键的刚性增加, 拉伸摩尔量提升, 从而提 升聚合度的脆性, 同时, 支链烷基的作用可进一步降低聚合物的熔点, 便于涂布使用。
辅助部分可采用纤维素、 玻璃纤维、 硅藻土等, 还可根据需要添加适量的紫外引发剂。
实施例三
在本实施例中, 提供了一种用于液晶显示器边框的高分子液晶材料, 由烷基一对苯二甲 酸和乙烯基醇交联聚合而成, 其聚合物的分子式为:
优选地, 采用邻位一对苯二甲酸 、 对应的醇
进行缩聚反应, 通过控制聚合度获得所需分子量的聚合物, 在原有聚合物的烷基链上增加碳 碳双键, 同时, 在苯环上增加一个支链烷基, 使得聚合物的玻璃化温度降低, 提升耐候性, 使其更能适应环境温度的变化, 并且, 支链烷基的作用可进一步降低聚合物的熔点, 便于涂 布使用, 且不会造成碳碳双键聚合反应困难。
辅助部分可采用纤维素、 玻璃纤维、 硅藻土等, 还可根据需要添加适量的紫外引发剂。
实施例四
在本实施例中, 提供了一种用于液晶显示器边框的高分子液晶材料, 由烷基一对苯二甲 酸和共轭乙烯基醇交联聚合而成, 其聚合物的分子式为:
优选地, 采用邻位_对苯二甲酸 和共轭乙烯基醇
C=C-C=C-R-OH进行缩聚反应, 通过控制聚合度获得所需分子量的聚合物, 在原有聚合物的 烷基链上增加碳碳共轭双键, 同时, 在苯环上增加一个支链烷基, 支链烷基的作用可进一步 降低聚合物的熔点, 便于涂布使用, 碳碳共轭双键的反应活化能明显低于碳碳双键, 便于激 发反应。
辅助部分可采用纤维素、 玻璃纤维、 硅藻土等, 还可根据需要添加适量的紫外引发剂。 其中,所述 R和 R'为直链烷基,直链上有 1 -3个碳。优选地,所述 R和 R'为 -C¾或 -C¾-C¾。 所述高分子液晶材料聚合物的聚合度 n值为 50-1000, 优选为聚合度 n值 500-600。 通过调整 反应时间、 反应温度、 催化剂的选取和用量等, 来调整聚合度的大小, 以获取不同分子量的 聚合产物。
在本发明中, 在原有聚合物的苯环和烷基上进行改性反应, 若在烷基上增加碳碳双键, 通过增加双键增加分子与分子之间的空间位阻, 使其在聚合到分子量时, 不会形成固态, 增 加了聚合物的粘度; 若在烷基链上进一步增加支链烷基, 以进一步降低聚合物的熔点, 便于 涂布工艺上使用; 若在苯环上进一步增加支链烷基, 以降低聚合物的熔点, 且易于与碳碳双 键聚合; 若在烷基链上增加碳碳共轭双键, 以降低聚合物的反应活化能, 便于激发反应。 通 过与不同的单体相聚合, 通过碳碳双键提升高分子液晶材料的粘性和耐候性, 使其在一定分 子量的状态下, 不会形成固态, 同时, 由于碳碳双键的存在, 可通过后续照射紫外光和加热 的方式使其进行交联聚合, 形成在强度和涂布性上都满足要求的边框材料。
步骤 1 ) 将对苯二甲酸和醇 按摩尔比 1 : 1配比, 反应温度为 60-100度,
步骤 2)将所获得的聚合物通过循环水冷的方式迅速冷却至温度为 35-40度,优选 38度, 防止反应残余的反应物继续反应, 控制分子量的上升, 控制聚合物的聚合度;
步骤 3 )抽真空干燥去除没有反应的醇, 真空度为 -0.1大气压, 为了控制反应速度不是过 于剧烈, 若过于剧烈, 分子量的均一性会降低, 一般真空度并不高, 一般稍低于大气压即可; 步骤 4) 经初滤后, 将其放入离心机内将小分子物质和所需聚合度的聚合物分离出来,
获得所需的可制造液晶显示器边框的聚合物。
可通过改变单体来合成不同的高分子液晶材料, 对其进行改性, 以获得适用于制造高分 子液晶边框的聚合物材料, 其替代了现有的聚环氧树脂, 其物化性能与液晶分子更接近, 本 身也是一种液晶材料, 所以对封装于其中的小分子液晶的污染降低, 这样, 可减小边框材料 的尺寸。
Claims
、 一种用 所述高分子液晶材料由带对苯二 甲酸的基团和带碳碳双键的醇交联聚合而成, 所述带对苯二甲酸的基团为对苯二甲酸, 所述 带碳碳双键的醇为乙烯基醇,其由对苯二甲酸和乙烯基醇交联聚合而成,聚合物的分子式为:
、 根据权利要求 1所述的用于液晶显示器边框的高分子液晶材料,其特征在于: 所述带对苯二 甲酸的基团为对苯二甲酸, 所述带碳碳双键的醇为带烷基的乙烯基醇, 其由对苯二甲酸和带 烷基的乙烯基醇交联聚合而成, 烷基链上增加支链烷基, 聚合物的分子式为:
、 根据权利要求 1所述的用于液晶显示器边框的高分子液晶材料,其特征在于: 所述带对苯二 甲酸的基团为邻位烷基一对苯二甲酸, 所述带碳碳双键的醇为乙烯基醇, 其由邻位烷基一对 苯二甲酸和乙烯基醇交联聚合而成, 在苯环上增加支链烷基, 其聚合物的分子式为:
、 根据权利要求 1所述的用于液晶显示器边框的高分子液晶材料,其特征在于: 所述带对苯二 甲酸的基团为邻位烷基一对苯二甲酸, 所述带碳碳双键的醇为共轭乙烯基醇, 其由烷基一对 苯二甲酸和共轭乙烯基醇交联聚合而成, 烷基链上增加碳碳共轭双键, 在苯环上增加支链烷 基, 其聚合物的分子式为-
、 根据权利要求 5中所述的用于液晶显示器边框的高分子液晶材料, 其特征在于: 所述 R为 -CH3或 -CH2-CH3。
、 根据权利要求 2中所述的用于液晶显示器边框的高分子液晶材料,其特征在于:所述 R和 R' 为直链烷基, 直链上有 1-3个碳。
、 根据权利要求 3中所述的用于液晶显示器边框的高分子液晶材料,其特征在于:所述 R和 R' 为直链烷基, 直链上有 1-3个碳。
、 根据权利要求 4中所述的用于液晶显示器边框的高分子液晶材料,其特征在于:所述 R和 R' 为直链烷基, 直链上有 1-3个碳。
0、 根据权利要求 1 中所述的用于液晶显示器边框的高分子液晶材料, 其特征在于: 所述高分 子液晶材料聚合物的聚合度 n值为 50-1000。
1、 根据权利要求 10中所述的用于液晶显示器边框的高分子液晶材料, 其特征在于: 所述高分 子液晶材料聚合物的聚合度 n值 500-600。
1、 一种采用权利要求 1 所述的高分子液晶材料的液晶显示器边框, 其特征在于: 所述高分子 液晶材料由带对苯二甲酸的基团和带碳碳双键的醇交联聚合而成, 所述带对苯二甲酸的基 团为对苯二甲酸, 所述带碳碳双键的醇为乙烯基醇, 其由对苯二甲酸和乙烯基醇交联聚合 而成, 聚合物的分子式为:
、 根据权利要求 1中所述的高分子液晶材料的液晶显示器边框, 其特征在于: 所述高分子 液 晶材料聚合物的聚合度 n值为 50-1000, 辅料为纤维素、 玻璃纤维、 硅藻土、 紫外线引发剂 中任选一种或多种。
3、 根据权利要求 11中所述的采用高分子液晶材料的液晶显示器边框, 其特征在于: 所述带对 苯二甲酸的基团为对苯二甲酸、 邻位烷基一对苯二甲酸或间位烷基一对苯二甲酸中任选一 种; 所述带碳碳双键的醇为乙烯基醇、 带烷基的乙烯基醇或共轭乙烯基醇中任选一种。 、 一种用于制造如权利要求 11所述的液晶显示器边框的方法, 其特征在于:
步骤 1 ) 将带对苯二甲酸的基团和带碳碳双键的醇按摩尔比 1 : 1配比, 反应温度为 60-100 度, 获得聚合物;
步骤 2) 将所获得的聚合物冷却至温度为 35-40度, 防止反应残余的反应物继续反应, 造成
分子量上升;
步骤 3 ) 抽真空干燥去除没有反应的醇, 真空度为 -0.1大气压;
步骤 4) 经初滤后, 将其放入离心机内将小分子物质和所需聚合度的聚合物分离出来, 获得 所需的可制造液晶显示器边框的聚合物。
、 根据权利要求 14中所述的用于制造液晶显示器边框的方法, 其特征在于: 所述带对苯二甲 酸的基团和带碳碳双键的醇的反应温度为 80度。
、 根据权利要求 14中所述的用于制造液晶显示器边框的方法, 其特征在于: 聚合物冷却至温 度为 38度。
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| CN106243661A (zh) * | 2016-08-29 | 2016-12-21 | 合肥惠科金扬科技有限公司 | 一种液晶显示设备的边框材料 |
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