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Organic silicon-acrylate nano emulsion

An acrylate and nano-emulsion technology, applied in the field of chemical industry, can solve the problems affecting the storage stability of polymer emulsions, difficult selection of comonomers, poor emulsion stability, etc., achieve high glass transition temperature, improve mechanical properties, Strength-enhancing effect

Inactive Publication Date: 2002-12-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes different types of nanoparticles called silicate microbial esters (SM) or silanes. These microspherules are made from specific molecules containing alkyl groups attached through carbon atoms at both ends. They behave like tiny balls on top of each other, allowing them to slide easily over surfaces while maintaining their original shape even if there're no external force applied. By adjusting certain parameters such as pH value, concentration ratio, type of surfactants involved, and addition of various substances, SMs may formulate well-spread films onto many kinds of objects including steel plates, ceramics, paints, metals, rubbers, fabrics, laminations, etc., resulting in durables and long lasting finishes.

Problems solved by technology

This patented technical problem addressed in this patents relates to modifying an acryl esteral type resin called AC-39 that exhibits improved properties like hardiness, stretching impact resistance, heat shock resistance, gas barrier performance, moisture vapor transmission ability, oxidative degradation resistance, water repelting property, and adsorption onto metal surfaces without losing their effectiveness over time when exposed to harsh environments during use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The monomer composition is butyl acrylate, methyl methacrylate, methacrylic acid, hydroxyethyl methacrylate, and vinyl alkoxysilane containing C5-C20. The composition formula is shown in Table 1:

[0038] Composition mass percentage, %

[0039] 1 Methyl methacrylate (MMA) 25

[0040] 2 Methacrylic acid (MAA) 1

[0041] 3 Butyl Acrylate (BA) 18

[0042] 4 Hydroxyethyl methacrylate 2

[0043] 5 vinyl organosiloxane 1

[0044] 6 Emulsifier 2

[0045] 7 Potassium persulfate (K 2 S 2 o 8 ) 0.2

[0046] 8 Sodium bicarbonate 0.1

[0047] 9 Dodecyl Mercaptan 2

[0048] 10 Propylene Glycol 0.2

[0049] 11 secondary deionized water 48

[0050] 12 Ammonia water (28%) 0.5

[0051] Add 1 part of emulsifier, 18 parts of water, 1 part of methacrylic acid, 3 parts of butyl acrylate, and 8 parts of methyl methacrylate into the reaction kettle, stir for 20 minutes, heat the temperature of the reaction kettle to 80 °C, and drop the trigger Continue to stir until the emu...

Embodiment 2

[0053] The monomer composition is butyl acrylate, styrene, acrylic acid, hydroxypropyl methacrylate, and vinyl alkoxysilane containing C5-C20. The composition formula is shown in Table 2:

[0054] Composition mass percentage, %

[0055] 1 Styrene (St) 25

[0056] 2 Acrylic (AA) 1

[0057] 3 Butyl Acrylate (BA) 15

[0058] 4 Hydroxypropyl methacrylate 2

[0059] 5 vinyl organosiloxane 3

[0060] 6 Emulsifier 2.5

[0061] 7 Potassium persulfate (K 2 S 2 o 8 ) 0.2

[0062] 8 Sodium bicarbonate 0.1

[0063] 9 Dodecyl Mercaptan 1

[0064] 10 Ethylene glycol 0.2

[0065] 11 secondary deionized water 50

[0066] Add 1 part of emulsifier, 20 parts of water, 1 part of acrylic acid, 2 parts of butyl acrylate, and 8 parts of styrene into the reactor, stir for 20 minutes, heat the temperature of the reactor to 80°C, add the initiator dropwise, and continue stirring until A faint blue light appeared in the emulsion. After 15 minutes, start to drop the pre-emulsified monom...

Embodiment 3

[0068] The monomer composition is isooctyl acrylate, methyl methacrylate, methacrylic acid, hydroxyethyl methacrylate, and vinyl alkoxysilane containing C5-C20. The composition formula is shown in Table 3:

[0069] Composition mass percentage, %

[0070] 1 Methyl methacrylate (MMA) 25

[0071] 2 Methacrylic acid (MAA) 2

[0072] 3 Isooctyl acrylate 10

[0073] 4 Hydroxyethyl methacrylate 2

[0074] 5 styrene 3

[0075] 6 vinyl organosiloxane 4

[0076] 7 Emulsifier 2

[0077] 8 Potassium persulfate (K 2 S 2 o 8 ) 0.2

[0078] 9 Sodium bicarbonate 0.1

[0079] 10 Mercaptoethanol 1.5

[0080] 11 Propylene glycol 0.2

[0081] 12 secondary deionized water 50

[0082] Add 1 part of emulsifier, 15 parts of water, 1 part of methacrylic acid, 1 part of isooctyl acrylate, 8 parts of methyl methacrylate, 2 parts of styrene, and 1 part of hydroxyethyl methacrylate into the reaction kettle, and stir for 20 Minutes, the temperature of the reactor was heated to 80°C, the ...

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Abstract

The preparation process of organosilicon-acrylic ester nano emulsion includes the following steps: firstly, adopting direct initator to prepare seed emulsion; pre-emulsifying monomer and adopting continuously drop-adding process to drop-add the pre-emulsion into the seed emulsion within 3-5 hr. to make reaction. As compared with non-silanized acrylic emulsion and silanized acrylic emulsion under the same condition said invented nano emulsion possesses more excellent properties of water-resistance, washing-resistance, chemical solvent resistance, weatherability, adhesive force, hardness and tensile strength, etc. and can be extensively used for external wall coating, water-proof paint and water adhesive, etc.

Description

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Claims

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Application Information

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Owner SOUTH CHINA UNIV OF TECH
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