TW593539B - Highly reflective polycarbonate plastic composition - Google Patents

Abstract

A highly reflective polycarbonate thermoplastic composition includes: 50 to 99 wt% of polycarbonate and 1 to 50 wt% of TiO2, which are mixed as a base material; and adding into the base material 0.5 to 50 parts by weight of a whitening agent and 0.05 to 0.5 parts by weight of a stabilizer, based on 100 parts by weight of the base material. As a result, a polycarbonate plastic material according to the present invention is highly reflective and excellent in thermal stability and color fastness.

Description

593539 V. Description of the invention (l) (1) [Technical field to which the invention belongs] The present invention relates to an optical plastic composition, a polycarbonate plastic with high stability and high reflectivity. With a (—), [previous technology], as more and more optical products enter the public's daily life, the academic industry is all committed to improving the efficiency of optical components and producing low light. Because plastic optical components have many advantages of glass optical components ==, including low raw material cost, good optical transmission performance, light weight, high-performance modeling ability, impact resistance, high safety, etc. Used in various optical products. Shaoyouzi, Polycarbonate (PC) is a kind of engineering plastic with good temperature, crystallinity, abrasion resistance and impact resistance. It is often used in IT and electrical industry. In some cases, for materials that require high reflectance under visible light, even in special wavelength ranges, I hope that the second high reflectivity of the light source, currently the bank's master * * This special Only χ + T. N +… human ± I materials with 1% are mainly polycarbonate ice plus TiO 2 a material, where the reflectivity mainly comes from its own brightness and concentration. The carbonate material is 2 Φ second life, using the polymer transparent property to reduce the interference of the polymer background to Yan Temple. Under the premise of severely sacrificing mechanical strength, increase the white t of the material: control; = =; improve the reaction time and reduce the color change 2- (4- (2- (λ- (〇κ 先 子 子 技术 科技 技术The main appeal is enz〇xazolyl) phenyl) ethenyl) ~

Page 4 V. Description of the invention (2) Phenyl) -5iethyi The amount of conversion into visible light has two side effects. One is the formation of silver streaks under heat retention conditions, and the finished product has a long decline. The other is to control the In appearance applications under different light sources, therefore, the polycarbonate plastic of the present invention can add its own whiteness and thermal stability by injection to f; the increase of the product and its emissivity is currently unacceptable Questions, ask specific questions. benzoxazole Tim has the problem of improving the material for the additive itself to crack the material, and the color variation of the hot baking state. When a wavelength is reversed, the phenomenon of large color difference and color variation will effectively overcome the above problems. The role of the above-mentioned ultraviolet light energy, but it is not good, produces gas yellowing on the surface of the long-term product, and when used with whiteness dye, the precise color matching of the finished product is required. A high reflection Q2), [invention content The main purpose of the invention of plastic f is to provide a highly reflective polycarbonate, and the product is to add a whiteness additive to the composition, and 敎 ^ ^ 叩 not only has the optical characteristics of high reflectance, At the same time, it has excellent ..., stability and color stability to effectively solve the lack of knowledge. Another object of the present invention is to provide a highly reflective polycarbonate plastic composition so that the color of the finished product has no color difference under different light sources, and can meet the appearance requirements of precise color matching. According to the present invention, a highly reflective polycarbonate plastic composition includes: a base material and a number of additives. The base material contains 50 to 99% by weight of polyratic acid S and 1 to 50% by weight of titanium dioxide. 100 weight ^ as a calculation basis, the additives are whiteness increasing agent 0.5 to 50 parts by weight

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V. Description of the invention (3) and stabilizer 0 · 0 5 ~ 0 · 5 parts by weight. When more successful, detailed descriptions will be provided through specific embodiments in conjunction with the accompanying drawings. Gu Yi understands the purpose, technical content, characteristics and effects of the present invention. 0 (IV), [Implementation]!

In the present invention, a polycarbonate (polycarionate, pc) is added as a base material, and the base material is mixed with each component in proportion to produce a polycarbonate plastic with high reflectance. A composition of the highly reflective polycarbonate plastic of the present invention includes a base material, which contains 50 to 99% by weight of polycarbonate and TiO2 by weight, and the base material is 100 parts by weight (PHR). As a calculation basis, a whiteness increasing agent 〇 · & ~ 〇ρ η r and a stabilizer 0.05 to 0.5 PHR are added to the base material of 100 PHR, and the whiteness increasing agent is 2-(4-(2- ( 4- (2-benzoxazolyl) phenyl) ethenyl) -phenyl) -5-methyl benzoxazole, the stabilizer is 3- (3,, 5, -Di-t-butyl-4, -hydroxy-phenyl) pr〇pi〇nyl dihydrazide, this stabilizer has

Thermal stability and color stabilization; In addition, additives such as plastic antioxidants and dyes can also be added. The molecular weight of polycarbonate S is between 7000 and 28,000, preferably 22,000, and high density polyethlene (〇ΡΕ) can also be added to the base material. ) To increase density and mechanical properties. The whiteness increasing agent can convert part of the ultraviolet light energy into visible light in the formula, thereby improving the whiteness of the material itself, thereby improving the reflection

Page 65993539 V. Description of the invention (4) Light quantity; in order to improve the thermal stability and color stability of the overall composition, the aforementioned stabilizer is added to the composition of the present invention to greatly improve the product by using this stabilizer The thermal stability and greatly reduced color variability make the finished product not only highly reflective, but also meet the requirements of high reliability and color stability. / '

I After understanding the composition of the highly reflective polycarbonate resin of the present invention, the following five specific formulation examples are used to explain the composition formula of the present invention and experimental data of its properties in order to familiarize those skilled in the art. Reference will be made to the description of these examples to obtain sufficient knowledge to implement it. -[Formulation example]: As shown in Table 1 below, it is a composition of five formulation examples of A, B, C, D, and E. Table 1

593539 5. Description of the invention (5) Formulation composition (PHR) ABCT Polycarbonate 87 87 87 87 丨 87 1 ____ J; __________- Ti02 12 12 12 12!: 12!] Whiteness increasing agent • 5 5 5 | Γ 5 — Stabilizer-0.3 0.3 Plastic antioxidant 0.1 0.1 0.1 0.1 0.1 II- HDPE 1 1 1 T Green dye--1 1! 1 !! Among them, the polycarbonate used is pure resin with molecular weight 2 2 0 0 0, Ti 02 is R-type high-purity powder, plastic antioxidant is I r 1 0 1 0 antioxidant produced by CIBA company, green dye is GN28, and its SOLVEN GN is 28. I. Whiteness comparison ·· Five plastic materials A, B, C, D, and E in Table 1 were made into smooth color plates, and then the color was measured by a spectrometer, and five colors were measured at different light wavelengths. The whiteness (or brightness) data displayed on the board is shown in Table 2. The relationship diagram drawn from Table 2 is shown in the first diagram. Among them, due to the differences in the formulas of the B and C groups

593539 V. Description of the invention (6) Only the addition of stabilizers. The differences between the formulas of groups D and E are also stabilizers. The composition has no effect on color. Therefore, in Table 1, B, C, D, and E are Put them in the same rot. Table 2 Wavelength (nm) AB, CD, Η 100 — "37:85 33.4" 39] 420 ρ8 ^ 33 ~ 86.2 84.7 440 98.13 107.3 1 92.5 460 97.50 1U1.6 p89.9 480 ^ 97T2 '98.7 93.6 500 96.34] ΐ 97.2 ποο.9 yio '95777Π 9ί) .9 W2.7 540 953 1UU—Independent 6-95: Γ — 1 98.4 — 153—, the factory earns — one lion — 95.5 ^ one 95: 1 one bu — 620 1535 12 96 15 [— 15.4 " 660 95: 77— '-95 『—18『 — ^ Ύ6: 00 ～~ 『『 W ～ —70ΪΓ— 96.19' 157Γ 'under Xe arc light source (according to CIE Lighting Association Defined as D65 light source) to

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The spectrometer directly measures & of the five formulations as shown in Table 3. Degree data (ie L value), the resulting l value. Table 3 ABCD — L value 96.7 98.4 98.1 99.3 β, C, D and E white with the addition of μ. The color measurement results in Table 3 show that this white yield 9 σ clam, The addition of Α has no direct effect. Θ σ must not compete for material reflection

-Comparison of thermal retention test. First, the five formulations in Table 1 were injection molded to form swatches, but the previous raw materials were injected at 280, minutes, respectively.丨 Thermal performance can be effectively improved.的 对 体 组合 的 表 4 A B. ~ ”1 —] E Silver streaks Slight 1 Severe !! ........ Benefit「 .. =…: 一 .... 1 "， Serious None

3. Hot baking test:

Page 10 593539 V. Description of the invention (8) The raw materials A, B, and C are made into color plates according to normal conditions, and then the color is measured with a spectrometer, each of which is a control group, and the color plates are placed in an oven to 1 2 Take out the color measurement after baking at 0 ° C for 100 hours, and compare with the control group. The results are shown in Table 5. According to the definition of the Lighting Association (C · IE), the brightness is represented by L value, the red and green values are represented by a value, and the yellow and blue values are represented by b sounds. Using these three values can be calculated to obtain the color difference value (△ E) The calculation formula 1 is as follows: AE = (ALHAaH Ab2) 172 'The results in Table 5 show that without the stabilizer's protection, the material is discolored due to heat. _ Table 5 Control group 1! Comparison group Ί 1a 1! L ab Color difference value A 96.7 -0.7 1.0 96.6 ι! -0.7 0.6 0.4 B 98.4] 0.3 I 2.7 96.2 0.3 1.8 2.4 C 98.1 0.3 2.5 [97.7 ----- 0.2 1.9 0.7 4. Evaluation of color variability: Use two spectrometers, D and E, to measure the color using two conditions including UV light and delete UV light, and then compare the color difference with each other. The results are shown in Table 6. Table 6

Page 11 593539 V. Description of the invention (9)

ΓΓ, the same: Λ light, the same as the formula D-the color difference of the swatch ... In the following, Λ is not severe, and the external view requires the color stability of the members. Therefore, ',,, 1 meets this requirement, and the colorless variation phenomenon of the E formula occurs-this is the reason why the addition of the female fixative can improve the problem of color variation. V. Evaluation of mechanical characteristics: Then: Ϊ1 ?, C, D, E each made into color plates according to normal conditions. = Jiang, five kinds of color plates were tested for various mechanical properties. = lng / ndex (MI), impact strength (tens i le strength) and thermal deformation ice: the standard and test results of the extensive test are listed in Table 7, from the results #, Γ & 4 degrees Additives and stabilizers have no effect on the mechanical properties of the finished product, and the mechanical properties of ασ are normal values. Table 7 ^

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Therefore, in the present invention, the polycarbonate can be controlled by the addition system to improve the stability, while using the stability and color stability of the above-mentioned stabilizer, there is no gas silver streaks on the surface of the long product, and there is no appearance requirement under different light sources in the long-term finished color . The use of whiteness increasing agent in combination with dyes I. The effective addition of reflectance in a certain wavelength range makes the product have excellent heat period, and it is not easy to crack under the conditions of heat retention, and it is not easy to change color under hot baking state, and color difference The above-mentioned performance can achieve precise color matching. The embodiments are used to explain the features of the present invention. The purpose is to enable those skilled in the art to understand and implement the content of the present invention, rather than to limit the patent scope of the present invention. All other equivalent modifications or modifications made without departing from the spirit disclosed by the present invention should still be included in the scope of the patent application as described below. End of chapter

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Claims (1)

593539 6. Scope of patent application 1. A kind of high-reflection, — A........... From the next basic material, which contains polycarbonate 50 ~ 99% by weight and 'min .: 50% by weight. And using the base material as 〇〇〇〇part by weight as the external gasification 敎 whiteness increasing agent 0 · 5 ~ 50 parts by weight; and >benchmark; stabilizers 0 · 0 5 ~ 0 · 5 parts by weight.丨, 2 · The highly reflective polycarbon product as described in item 1 of the scope of patent application, wherein the whiteness increasing agent is 2- (4- (2- (4- (2- + ^ benzoxazolyl) phenyl) ethenyl) -phenyl) -5-methyi benzoxazo1e ° 3 · The highly reflective polycarbonate plastic composition as described in item 1 of the scope of patent application, wherein the stabilizer is 3- (3 ,, 5, Di- t — butyl_4 ,: r hydroxy phenyl) propi〇nyl dihydrazide, has the function of thermal stability and color stability. 4 · The highly reflective polycarbonate plastic composition as described in item 1 of the Shenyan patent scope, wherein the molecular weight of the polycarbonate is between 17Q00 and 28,000. 5. High-reflective polycarbonate plastic composition as described in item 丨 of the patent application scope, which further contains plastic antioxidants. 6. The highly reflective polycarbonate plastic composition according to item 丨 of the patent application scope, which further contains a dye. 7. The highly reflective polycarbonate plastic composition as described in item 丨 of the patent application scope, wherein the base material further comprises high density polyethylene.