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Styrene-acrylic emulsion and preparation method thereof

A technology of styrene-acrylic emulsion and styrene, applied in the direction of water-repellent addition, coating, paper coating, etc., can solve the problems of easy foaming, unsatisfactory paper surface strength, poor water resistance, etc., and achieve small foaming , good affinity and binding force, the effect of maintaining the strength of paper

Active Publication Date: 2012-07-18
广州星业科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the currently disclosed literature, small molecule emulsifiers are basically added in the preparation process of styrene-acrylic emulsions. For example, CN102225982A tends to add anionic emulsifiers and nonionic emulsifiers as composite emulsifiers, and CN101768895A tends to use cationic emulsifiers or nonionic emulsifiers. agent, CN101671416A tends to select composite anionic emulsifiers; styrene-acrylic emulsions prepared by small molecule emulsifiers often have some disadvantages, such as easy foaming, poor water resistance, and unsatisfactory paper surface strength.

Method used

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  • Styrene-acrylic emulsion and preparation method thereof
  • Styrene-acrylic emulsion and preparation method thereof
  • Styrene-acrylic emulsion and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Add 113g of adipic acid and 84.3g of diethylenetriamine into a 500mL reactor, stir, heat to reflux under normal pressure, vacuumize and dehydrate after 6h, the vacuum degree is -0.098Mpa, when the temperature rises to 180°C, stop vacuuming , continue to keep warm for 4h, then lower the temperature to 140°C, add 168g of water to obtain polyamide 1 with a solid content of 50%.

[0039] Weigh 31g of polyamide 1 and 235g of water in a 500mL reactor, adjust the pH value to 3.6, then heat to 75°C, then dropwise add 10g of 3wt% azobisisobutylamidine hydrochloride aqueous solution (wt refers to the mass fraction , hereinafter the same) and 100g of mixed monomer, dropwise for 4h. Wherein the mixed monomers include 55g styrene, 30g butyl acrylate and 15g butyl methacrylate. After the dropwise addition, continue to keep warm at about 75°C for 3 hours to obtain styrene-acrylic emulsion 1 with a solid content of 30%.

Embodiment 2

[0041] Add 20g of dodecanedioic acid, 100g of adipic acid, and 84.3g of diethylenetriamine into a 500mL reactor, stir, heat to reflux under normal pressure, vacuumize and dehydrate after 6h, vacuum degree -0.098Mpa, when the temperature rises to At 180°C, stop vacuuming, keep warm for 4 hours, then cool down to 140°C, add 176g of water to obtain polyamide 2 with a solid content of 50%.

[0042] Add 25.1 g of 2,3-epoxypropyltrimethylammonium chloride to polyamide 2, heat to 60° C., and keep warm for 4 hours to obtain modified polyamide 2 with a solid content of 53%.

[0043] Weigh 25g of modified polyamide 2 and 200g of water in a 500mL reactor, adjust the pH value to 5.7, heat to 80°C, then add 15g of 3wt% aqueous solution of azobisisobutylamidine hydrochloride, 90g of mixed mono Body and 10g mercaptoethanol aqueous solution (30wt%), dropwise time 4h. Wherein the mixed monomers include 60g styrene, 20g butyl acrylate and 10g tert-butyl acrylate. After the dropwise addition, ...

Embodiment 3

[0045] Add 17.6g of sebacic acid, 100g of adipic acid, and 84.3g of diethylenetriamine into a 500mL reactor, stir, and heat to reflux under normal pressure. After 6h, vacuumize and dehydrate. The vacuum degree is -0.098Mpa. ℃, stop vacuuming, continue to keep warm for 4 hours, then lower the temperature to 140 ℃, add 176g of water, and obtain polyamide 3 with a solid content of 50%.

[0046] Add concentrated hydrochloric acid dropwise to polyamide 3, control the temperature below 10°C, adjust the pH value to 4.2, then add 44.5g of hydrogen peroxide (50wt%), then program the temperature at a rate of 10°C / h, heat it to 60°C and keep it warm After 3 hours, the modified polyamide 3 was obtained with a solid content of 39%.

[0047] Weigh 35g modified polyamide 3, 200g water and 0.005g ferrous sulfate heptahydrate in a 500ml reactor, adjust the pH value to 4.2, heat to 80°C, then dropwise add 10g mixed initiator aqueous solution (containing 5wt% super Fluidic acid sodium and 3wt% ...

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Abstract

The invention discloses styrene-acrylic emulsion, which contains the following raw materials in part by weight: 0.5 to 50 parts of polyamide and / or modified polyamide, 80 to 110 parts of mixed monomer, 100 to 500 parts of water, and 0.1 to 25 parts of initiator. The styrene-acrylic emulsion has the characteristics of good waterproof effect, high aging speed, capabilities of improving the surface strength of paper and improving the printing activity of the paper and the like. The invention also discloses a preparation method for the styrene-acrylic emulsion. The polyamide or the modified polyamide used in the polymerization process of the styrene-acrylic emulsion is used as one of dispersants or a unique dispersant; and the invention has the characteristics of low cost, simple process and the like.

Description

technical field [0001] The invention belongs to the technical field of synthesis in polymer chemistry, and in particular relates to a styrene-acrylic emulsion and a preparation method thereof. Background technique [0002] The emulsion obtained by copolymerizing monomers such as styrene and acrylate is called styrene-acrylate emulsion, or styrene-acrylic emulsion for short. Styrene-acrylic emulsion is the most researched system in emulsion polymerization, and it is also one of the top ten non-crosslinked emulsions with important industrial application value in the world today. Due to its high cost performance, it is widely used in the fields of adhesives, paper sizing agents and coatings. [0003] With the development of the paper industry, styrene-acrylic emulsion has become an indispensable industrial product in the paper industry and paper product processing. It is widely used in paper impregnating agents and surface sizing agents to improve the tensile strength and ring...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/04C08F212/08C08F220/18C08F220/14C08G69/26C08G69/48C08G69/36C08L25/14C08L77/00C08L77/06D21H19/00D21H21/16
Inventor 黄育苗孟巨光卢建文
Owner 广州星业科技股份有限公司
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