Acrylic polyurethane coating and preparation method and application thereof

A technology of acrylic polyurethane and acrylate, applied in polyurea/polyurethane coatings, coatings, instruments, etc., can solve problems such as poor leveling, brittle film layers, and insufficient quality of diffusion films, and achieve good light transmission And light diffusion, improve the bonding strength, good effect of coating process

A technology of acrylic polyurethane and acrylate, applied in polyurea/polyurethane coatings, coatings, instruments, etc., can solve problems such as poor leveling, brittle film layers, and insufficient quality of diffusion films, and achieve good light transmission And light diffusion, improve the bonding strength, good effect of coating process

CN107216792AActive Publication Date: 2017-09-29周建明
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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0053] A preparation method for an acrylic polyurethane coating, comprising the following steps:

[0054] (1) Preparation of acrylic resin with hydroxyl

[0055] 1) Add part of the initiator and organic solvent into the reaction kettle, and raise the temperature to 50-120°C;

[0056] 2) Add dropwise the mixed liquid composed of acrylate monomer, initiator and organic solvent, control the dropping time to 1-3 hours, and drop-adding temperature to 60-120°C;

[0057] 3) After the dropwise addition, react at 70-120°C for 3-5 hours, add a molecular weight regulator solution composed of a molecular weight regulator and an organic solvent, and continue the reaction for 1-2 hours;

[0058] 4) Add the organic solvent and the remaining initiator dropwise within 0.5 to 1 hour, react at 80 to 120°C for 2 to 3 hours, cool down to 60°C and discharge to prepare acrylic resin with hydroxyl groups;

[0059] The initiator in step 1) accounts for 15wt%~25wt% of total initiator addition; The in...

Embodiment 1

[0098] 1. Preparation of acrylic resin with hydroxyl groups

[0099] Preparation of raw materials: a. Prepare mixed monomer solution, 204g methyl methacrylate, 120g isobornyl methacrylate, 32g hydroxypropyl acrylate, 40g butyl acrylate, 4g acrylic acid, 200g ethyl acetate and 1.5g peroxide Dibenzoyl was mixed and stirred evenly; b. To prepare a molecular weight modifier solution, 0.2g of dodecyl mercaptan and 20g of ethyl acetate were mixed evenly.

[0100] 1) Add 100g of ethyl acetate and 0.5g of dibenzoyl peroxide into a four-necked reaction flask, and raise the temperature to 70-80°C;

[0101] 2) Adding the mixed monomer solution dropwise, controlling the dropping time to be 1 hour, and the dropping temperature to be 80-85°C;

[0102] 3) After the dropwise addition, react at 80-85°C for 3 hours, add the molecular weight regulator solution, and continue to react for 2 hours;

[0103] 4) Add dropwise a mixture of 0.4g dibenzoyl peroxide and 40% ethyl acetate within 0.5 hour...

Embodiment 2

[0111] 1. Preparation of acrylic resin with hydroxyl groups

[0112] Prepare raw materials: a, prepare mixed monomer solution, mix 224g methyl methacrylate, 68g ethyl methacrylate, 60g hydroxypropyl acrylate, 40g butyl acrylate, 8g acrylic acid, 200g butyl acetate and 1.5g benzene peroxide Mix tert-butyl formate and stir evenly; b, prepare molecular weight regulator solution, mix 0.2g mercaptoethanol and 20g butyl acetate evenly.

[0113] 1) Add 200g of butyl acetate and 0.5g of tert-butyl peroxybenzoate into a four-necked reaction flask, and raise the temperature to 110-120°C;

[0114] 2) Adding the mixed monomer solution dropwise, controlling the dropping time to be 1.5 hours, and the dropping temperature to be 110-120°C;

[0115] 3) After the dropwise addition, react at 110-120°C for 3 hours, add the molecular weight regulator solution, and continue the reaction for 1.5 hours;

[0116] 4) Add a mixture of 0.4g tert-butyl peroxybenzoate and 40g butyl acetate dropwise withi...

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Abstract

The invention discloses an acrylic polyurethane coating and a preparation method and application thereof in manufacture of a connecting material or a protective coating. The acrylic polyurethane coating is prepared by mixing hydroxyl acrylic resin, a hydroxyl polyurethane plasticizer and a polyisocyanate curing agent. The acrylic polyurethane coating is mainly used for making the resin connecting material of an optical diffusion film, and the coating after the film formation has good light transmittance and light diffusion property and high scratch resistance, and has the advantages of prevention of falling off of resin micro beads in a diffusion layer. The acrylic polyurethane coating can also be used for making optical films such as brightening films and reflecting films, and the ratio of the three components can be adjusted according to the use and the substrate characteristics of different optical films so as to achieve the coating performances required by different purposes.

Description

technical field [0001] The invention relates to an acrylic polyurethane coating and a preparation method and application thereof. Background technique [0002] An optical diffusion film is used in liquid crystal displays of mobile phones, digital cameras, televisions, etc., and its function is to evenly diffuse the light of point light sources or line light sources into uniform, high-brightness surface light sources. The commonly used optical diffusion film is composed of base material, diffusion particles and connecting material. The commonly used base material is PET film, or other plastic films; the diffusion particles are generally polymethacrylic resin microbeads, or other polymers Microbeads; the linker is commonly used as a mixture of hydroxyl acrylic resin and polyisocyanate curing agent. The manufacturing process of the diffusion film is to mix the diffusion particles and the binder together, and then coat it on the substrate. When the resin in the binder and the c...

Claims

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Application Information

Patent Timeline
29 Sep 2017
Publication
CN107216792A
IPC
C09D175/04; C09D7/12; C08G18/62; C08G18/64; C08F220/14; C08F220/18; C08F220/28; C08F220/06; C08G18/75; C08G18/48; C08G18/42; G02B5/02
CPC
G02B5/0268; C09D175/04; C08F220/14; C08G18/4081; C08G18/4277; C08G18/4825; C08G18/4854; C08G18/6254
Inventors
周建明