CN105754039B - A kind of poly(4-methyl-1-pentene) light diffusing agent and preparation method thereof - Google Patents

Abstract

The invention provides a poly 4-methyl-1-pentene light diffusing agent and a preparation method thereof. On the surface of poly 4-methyl-1-pentene particles, introduce 1,2-epoxy-5-hexene, 3,4-epoxy-1-butene, allyl glycidyl ether to participate in polymerization, and heat up To the reaction temperature, after the reaction is completed, centrifuge and dry. That is, the light diffusing agent product is obtained.

Description

A kind of poly 4-methyl-1-pentene light diffusing agent and preparation method thereof

technical field

The invention relates to a preparation method of a light diffusing agent, in particular to a poly 4-methyl-1-pentene light diffusing agent and a preparation method thereof.

Background technique

Light diffusion is widely used in lighting, display, projection imaging, laser and other fields. There are mainly inorganic light diffusing agents and organic light diffusing agents: inorganic light diffusing agents mainly include: nano barium sulfate, calcium carbonate, silicon dioxide, etc. These inorganic-type light diffusing agents, inorganic-type light diffusing agents are solid microspheres from a microscopic point of view, and light cannot pass through this solid sphere, which will affect the transmission of many light rays. Affects brightness or light transmission. Inorganic light diffusing agents cannot be selected for lampshades that require light transmittance above 50%; organic light diffusing agents mainly include acrylic type, styrene type, acrylic resin type, etc. These resins themselves are transparent or translucent , most of the light can pass through, using the difference between the refractive index of the material of these light diffusing agents and the refractive index of the substrate, after the light is refracted many times, the light passing through the substrate becomes bright and soft, and has an impact on the light transmittance of the material Smaller, it is a good choice for optical materials such as lampshades.

CN104059246 discloses a light-transmitting inorganic light diffusing agent, which is characterized in that: the weight percentage of each component is: cryolite 85-94%, pyrophyllite 3-8%, kaolin 2-5%, potassium feldspar 0.5-1 %, brucite 0.2-1%, use the fluidized bed to coat the cryolite, and mix the powdery material with the heated hot air in the swirling flow dynamic calciner, and the specific surface can be instantly calcined, melted, and spheroidized. The surface is covered with a reflective layer, so that the cryolite has good light transmission and light reflection.

CN102101971 discloses a light diffusing agent, which contains polyurethane acrylate, polymerizable monomers and organic particles, the number average molecular weight of the polyurethane acrylate is 1000-10000, and the polymerizable monomer is at least two The multifunctional acrylate monomer, the average particle diameter of the organic particles is 1.8-30 microns.

The light diffusing agent in the prior art is easy to age and decompose under long-time light. Surface treatment is required to ensure oxidation resistance to improve light dispersion.

Contents of the invention

Aiming at the deficiencies of the prior art, the invention provides a poly-4-methyl-1-pentene light diffusing agent and a preparation method thereof.

On the surface of poly-4-methyl-1-pentene particles, introduce 1,2-epoxy-5-hexene, 3,4-epoxy-1-butene, allyl glycidyl ether to participate in polymerization, and heat up To the reaction temperature, after the reaction is completed, centrifuge and dry. That is, the light diffusing agent product is obtained.

The invention provides a 4-methyl-1-pentene light diffusing agent and a preparation method thereof, which are realized through the following steps:

Step 1 Preparation of aqueous phase:

In parts by weight, add 1000 parts of water and 0.5-2 parts of sodium dodecylbenzenesulfonate into the reactor, and stir evenly.

Step 2 Preparation of oil phase:

In parts by weight, in 100 parts of poly-4-methyl-1-pentene, 1,2-epoxy-5-hexene, which accounts for 0.05 to 0.5 percent of the total amount of monomers, accounts for 0.5 percent of the total amount of monomers 0.05-0.5 of 3,4-epoxy-1-butene, participate in the polymerization, then add 0.2-0.6 parts of cumene hydroperoxide and 0.05-0.2 parts of sodium bisulfate, and stir evenly;

Step 3 Polymerization:

Add the oil phase solution to the reaction kettle equipped with the prepared water phase in step 1, add allyl glycidyl ether with a percentage of 0.1 to 0.5 of the total amount of monomers, and then react at 50-80°C for 1-4h , filtered after the reaction, and dried to obtain the product.

The poly-4-methyl-1-pentene is a commercially available product, such as a product produced by Mitsui Chemicals Co., Ltd., Japan. The 3,4-epoxy-1-butene is a commercially available product, such as a product produced by Shanghai Huzhen Industrial Co., Ltd. The 1,2-epoxy-5-hexene is a commercially available product. Such as the products produced by Shanghai Zhixin Chemical Co., Ltd. The allyl glycidyl ether is a commercially available product. Such as the products produced by Jinan Zhongwei Chemical Co., Ltd.

Beneficial effects of the present invention:

Existing light diffusers. Surface treatment is required to ensure uniform dispersion to improve light dispersion. By introducing oxygen-containing functional groups into the skeleton, the oxidation resistance of the light-scattering particles is improved, and it is not suitable for decomposition and aging, so that the light transmittance is improved.

Detailed ways

The following examples are only to further illustrate the present invention, but not to limit the protection scope of the present invention.

The invention provides a poly-4-methyl-1-pentene light diffusing agent and a preparation method thereof, which are realized through the following steps:

Example 1:

Step 1. Preparation of water phase

Add 1000Kg of water and 1Kg of sodium hexadecylbenzenesulfonate into a 2000L autoclave, and stir evenly.

Step 2. Preparation of oil phase

In a 500L reactor, 100Kg poly 4-methyl-1-pentene, 0.3Kg1,2-epoxy-5-hexene, 0.3Kg3,4-epoxy-1-butene, 0.4Kg over Cumene hydrogen oxide and 0.1Kg sodium bisulfate were stirred evenly.

Step 3. Polymerization

Add the oil phase solution to the autoclave equipped with the prepared water phase in step 1, pass through 0.25Kg allyl glycidyl ether, and then react at 70°C for 2 hours, centrifuge after the reaction, and dry to obtain the product. The number is T-1.

Example 2

Step 1. Preparation of water phase

Add 1000Kg of water and 0.5Kg of sodium hexadecylbenzenesulfonate into a 2000L autoclave, and stir evenly.

Step 2. Preparation of oil phase

In a 500L reactor, add 100Kg poly-4-methyl-1-pentene, 0.05Kg1,2-epoxy-5-hexene, 0.05Kg3,4-epoxy-1-butene, add 0.2Kg Cumyl hydrogen oxide, 0.05Kg sodium bisulfate, stir evenly.

Step 3. Polymerization

Add the oil phase solution to the autoclave equipped with the prepared water phase in step 1, pass through 0.1Kg allyl glycidyl ether, then react at 50°C for 4 hours, centrifuge after the reaction, and dry to obtain the product. The number is T-2.

Example 3

Step 1. Preparation of water phase

Add 1000Kg of water and 2Kg of sodium hexadecylbenzenesulfonate into a 2000L autoclave, and stir evenly.

Step 2. Preparation of oil phase

In a 500L reactor, add 100Kg poly-4-methyl-1-pentene, 0.5Kg1,2-epoxy-5-hexene, 0.5Kg3,4-epoxy-1-butene, add 0.6Kg over Cumyl hydrogen oxide, 0.2Kg sodium bisulfate, stir evenly.

Step 3. Polymerization

Add the oil phase solution to the autoclave equipped with the prepared water phase in step 1, pass through 0.5Kg allyl glycidyl ether, then react at 80°C for 1 hour, centrifuge after the reaction, and dry to obtain the product. The number is T-3.

Comparative example 1

Without adding 1,2-epoxy-5-hexene, the others are the same as in Example 1, and the product number is T-4.

Comparative example 2

Allyl glycidyl ether is not added, the others are the same as in Example 1, and the product number is T-5.

Comparative example 3

Without adding 3,4-epoxy-1-butene, the others are the same as in Example 1, and the product number is T-6.

Example 4

1Kg of light-scattering particles and 0.3Kg of antioxidant prepared in Example 1-3 and Comparative Example 1-3 were pre-dispersed with the diffusing agent. After adding 100Kg of PC particles, they were transferred to a low-speed mixer for stirring, and after mixing evenly A twin-screw extruder is used for melt blending and granulation, and finally an injection molding machine is used to form a light diffusion plate.

optical test

Use a light transmittance/haze tester (EEL57D, Shanghai Precision Instrument Co., Ltd.), and test according to GB/T2410-2008.

Sample serial number Transmittance% T-1 85 T-2 79 T-3 88 T-4 73 T-5 71 T-6 67

Claims (1)

1. a kind of preparation method of poly(4-methyl-1-pentene) light diffusing agent, it is characterised in that include the following steps：

The preparation of step 1 water phase：

By weight, 1000 parts of water are added in a kettle, and 0.5-2 parts of dispersants stir evenly；

The preparation of step 2 oil phase：

By weight, 100 parts of poly(4-methyl-1-pentene)s account for poly(4-methyl-1-pentene) total amount degree 0.05~0.5 1,2- epoxy group -5- hexenes, account for 3, the 4- epoxy -1- fourths of poly(4-methyl-1-pentene) total amount degree 0.05~0.5 Alkene participates in polymerization, adds 0.2-0.6 parts of cumyl hydroperoxides and 0.05~0.2 part of niter cake stirs evenly；

Step 3 polymerisation：

By weight, oil-phase solution is added in step 1 equipped with having prepared in the reaction kettle of water phase, addition account for poly- 4- methyl- The allyl glycidyl ether of 1- amylene total amounts degree 0.1~0.5 then at 50-80 DEG C, reacts 1-4h, reaction knot It is filtered after beam, drying obtains product.