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Room temperature self-crosslinking acrylic emulsion and a preparation method thereof

A self-crosslinking acrylic and acrylic technology, used in applications, inks, household appliances, etc., can solve the problems of water resistance, poor alcohol dilution resistance, inability to produce chemical bonds, poor printing effect, etc., and achieve good adhesion and physical properties. Improved, dry film-forming effect

Inactive Publication Date: 2016-11-16
SHANGHAI WEIKAI CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most water-based acrylic resins in the domestic market are single-component systems. There are only physical bonds such as hydrogen bonds and van der Waals forces between molecules, and no chemical bonds can be produced. Therefore, their resistance to water and alcohol dilution is very poor, and thickening or The phenomenon of gel demulsification, and most companies add alcohol solvents, they are miscible with a certain proportion of water first, reducing the concentration of alcohol solvents, which increases the water content, resulting in poor printing results

Method used

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  • Room temperature self-crosslinking acrylic emulsion and a preparation method thereof
  • Room temperature self-crosslinking acrylic emulsion and a preparation method thereof
  • Room temperature self-crosslinking acrylic emulsion and a preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] This embodiment relates to a kind of acrylic emulsion of this embodiment using the raw materials of the following components and contents for preparation:

[0028]

[0029]

[0030] Above-mentioned aqueous acrylic acid emulsion is prepared according to the following process steps:

[0031] Feeding: After rinsing the two reactors, add components B and C as the pre-emulsion according to the formula ratio, turn on the stirring at 800rpm to make it evenly stirred, then keep the speed at 250rpm, take out 5g of component B as the seed, and at the same time Add two 40% portions of Part D to the B and C pre-emulsions respectively. Use component A as the primer, raise the temperature to 80°C, add initiator 10% E to the primer, add the seed emulsion for 5 minutes and keep it warm for 30 minutes, start to add the pre-emulsion B component for about 1 hour, keep it warm for 1 hour, and then drop Add component C for about 1 hour, keep warm for 2 hours, then cool down to 40°C, ...

Embodiment 2

[0035] The acrylic emulsion of this embodiment is prepared using the raw materials of the following components and contents:

[0036]

[0037]

[0038] Above-mentioned aqueous acrylic acid emulsion is prepared according to the following process steps:

[0039] Feeding: After rinsing the two reactors, add components B and C as the pre-emulsion according to the formula ratio, turn on the stirring at 800rpm to make it evenly stirred, then keep the speed at 250rpm, take out 5g of component B as the seed, and at the same time Add two 40% portions of Part D to the B and C pre-emulsions respectively. Use component A as the primer, raise the temperature to 80°C, add initiator 10% E to the primer, add the seed emulsion for 5 minutes and keep it warm for 30 minutes, start to add the pre-emulsion B component for about 1 hour, keep it warm for 1 hour, and then drop Add component C for about 1 hour, keep warm for 2 hours, then cool down to 40°C, add F and stir for 20 minutes when th...

Embodiment 3

[0044] The acrylic emulsion of this embodiment is prepared using the raw materials of the following components and contents:

[0045]

[0046] Above-mentioned aqueous acrylic acid emulsion is prepared according to the following process steps:

[0047] Feeding: After rinsing the two reactors, add components B and C as the pre-emulsion according to the formula ratio, turn on the stirring at 800rpm to make it evenly stirred, then keep the speed at 250rpm, take out 5g of component B as the seed, and at the same time Add two parts of 40% component D to B and C pre-emulsion respectively. Use component A as the primer, raise the temperature to 80°C, add initiator 10% E to the primer, add the seed emulsion for 5 minutes and keep it warm for 30 minutes, start to add the pre-emulsion B component dropwise for about 1 hour, keep it warm for 1 hour, and then Add component C dropwise for about 1 hour, keep warm for 2 hours, then cool down to 40°C, add F and stir for 20 minutes when the ...

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Abstract

The invention provides a room temperature self-crosslinking acrylic emulsion and a preparation method thereof. The acrylic emulsion comprises the following components: water, styrene, vinyl monomer, a functional monomer, a crosslinking monomer, an emulsifier and an initiator. The preparation method comprises the following steps: preparing a monomer pre-emulsion 1, preparing a monomer pre-emulsion 2, mixing a pH buffering agent, an emulsifier, an initiator and water, adding part of the monomer pre-emulsion 1, reacting, adding the residual monomer pre-emulsion 1 and the residual initiator, reacting, and adding the crosslinking monomer to obtain product. The water-soluble acrylic coating does not need any film forming auxiliary or cosolvent addition for film forming. The coating can effectively hinder the movement of small molecules or small alcohols, and can be added in high-content common alcohol solvent. The waterborne acrylic emulsion as a main film-forming material endows the aqueous ink with high adhesion and dry formed film, and can satisfy the physical properties of waterborne ink.

Description

technical field [0001] The invention relates to a room-temperature self-crosslinking acrylic emulsion and a preparation method thereof, belonging to the technical field of water-based ink manufacture. Background technique [0002] The ink uses polymer resin as the binder, and by adding dispersed and stable pigments, the ink can print patterns with stable colors. Since the water-based ink does not contain volatile solvents, it reduces the emission of harmful gases and greatly improves people's safety. Water-based inks are gradually replacing solvent-based inks in printing and packaging products with very strict requirements such as tobacco, alcohol, food, medicine, and children's toys. However, compared with solvent-based inks, water-based inks dry slowly during the printing process, which seriously affects printing efficiency. , which seriously restricts the application of water-based inks and cannot replace solvent-based inks. By adding a solvent to the water-based polymer...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F220/14C08F220/18C08F222/02C08F220/58C08F2/30C08F2/26C09D11/107
CPCC08F2/26C08F2/30C08F212/08C09D11/107C08F220/14C08F220/1804C08F222/02C08F220/58
Inventor 董海普李珊王玉春
Owner SHANGHAI WEIKAI CHEM
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