Organosilicon-modified styrene-acrylic architectural waterproof latex and preparation method thereof

A technology of building waterproofing and silicone, which is applied in the field of latex for building waterproofing coatings and its preparation. It can solve the problems of poor compatibility, low surface energy, water resistance and air permeability, and achieve improved compatibility, wide distribution, and excellent storage stability. sexual effect

Inactive Publication Date: 2012-06-13
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for preparing silicone-modified styrene-acrylic building waterproof latex. It has the characteristics of strong temperature resistance, water resistance and good air permeability, and can avoid the problem of poor compatibility between the condensed silica and organic styrene-acrylic resin

Method used

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  • Organosilicon-modified styrene-acrylic architectural waterproof latex and preparation method thereof
  • Organosilicon-modified styrene-acrylic architectural waterproof latex and preparation method thereof
  • Organosilicon-modified styrene-acrylic architectural waterproof latex and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The total amount of emulsifier is 1.2 (wt)% of the system, of which the weight ratio of anion: non-ionic emulsifier is 2:1, and the amount of γ-methacryloxypropyl trimethoxysilane (KH570) is 0.5 (wt) % as an example:

[0033] 1. Weighing:

[0034] Weigh 13.5 kg styrene, 32.7 kg butyl acrylate, 0.7 kg acrylamide, 0.6 kg acrylic acid, 0.3 kg sodium bicarbonate, 0.7 kg sodium dodecylbenzenesulfonate, 0.4 kg nonylphenol polyoxyethylene ether, 0.1 kg propenyl ether sulfonic acid sodium salt, 0.5 kg KH570, 0.5 kg potassium persulfate and 50 kg deionized water.

[0035] And 0.7 kg sodium dodecylbenzene sulfonate, 0.4 kg nonylphenol polyoxyethylene ether, 0.1 kg propenyl ethyl ether sulfonic acid sodium salt are mixed to form 1.2kg emulsifier mixture, and then 1.2 kg emulsifier mixture is divided into Two servings, one is 0.84kg and the other is 0.36kg.

[0036] Divide 0.5 kg of potassium persulfate into three parts, the first part is 0.16kg, the second part is 0.24kg, and t...

Embodiment 2

[0043] The total amount of emulsifier is 1.2 (wt)% of the system, where the weight ratio of anion: non-ionic emulsifier is 1:2, without KH570 as an example:

[0044] 1. Weighing:

[0045] Styrene 13.5%

[0046] Butyl Acrylate 33.2%

[0047] Acrylamide 0.7%

[0048] Acrylic 0.6%

[0049] Sodium bicarbonate 0.3%

[0050] Sodium dodecylbenzenesulfonate 0.3%

[0051] Nonylphenol ethoxylate 0.8%

[0052] Sodium propenyl ether sulfonate 0.1%

[0053] Potassium persulfate 0.5%

[0054] Deionized water 50%

[0055] 2. Preparation process:

[0056] 1. Add 70% emulsifier, deionized water, styrene, butyl acrylate, pH regulator, and functional monomer into the emulsifier for pre-emulsification at room temperature to obtain a pre-emulsion;

[0057] 2. In the stirred polymerization reactor, add the remaining emulsifier and water, 20% of the pre-emulsion and 50% of the initiator solution in step (1), and add the reaction system water bath to 70±1°C until the blue light appears in the...

Embodiment 3

[0061] The total emulsifier dosage is 1.2 (wt)% of the system, where the anion: nonionic emulsifier weight ratio is 1:2, and the KH570 dosage is 0.5 (wt)% as an example:

[0062] 1. Weighing:

[0063] Styrene 13.5%

[0064] Butyl Acrylate 32.7%

[0065] Acrylamide 0.7%

[0066] Acrylic 0.6%

[0067] Sodium bicarbonate 0.3%

[0068] Sodium dodecylbenzenesulfonate 0.3%

[0069] Nonylphenol ethoxylate 0.8%

[0070] Sodium propenyl ether sulfonate 0.1%

[0071] γ-Methacryloxypropyltrimethoxysilane 0.5%

[0072] Potassium persulfate 0.5%

[0073] Deionized water 50%

[0074] 2. Preparation process:

[0075] 1. Add 70% emulsifier, deionized water, styrene, butyl acrylate, pH regulator, and functional monomer into the emulsifier for pre-emulsification at room temperature to obtain a pre-emulsion;

[0076] 2. In the stirred polymerization reactor, add the remaining emulsifier and water, 20% of the pre-emulsion and 50% of the initiator solution in step (1), and add the react...

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Abstract

The invention relates to organosilicon-modified styrene-acrylic architectural waterproof latex and a preparation method thereof. The organosilicon-modified styrene-acrylic architectural waterproof latex is prepared by utilizing a compound emulsification system and copolymerizing a functional monomer of gamma-methacryloxypropyltrimethoxysilane (KH-570) on a shell layer of styrene-acrylic latex by a seeded emulsion polymerization method. The latex has an excellent film-forming property and weather resistance of styrene-acrylic acid, and also has the characteristics of low surface energy, strong temperature resistance, high water resistance and air permeability and the like of organosilicon; meanwhile, the problem that silicon dioxide and organic polyacrylate which are condensed have low compatibility is solved. The latex has excellent cement compatibility; and a prepared polymer cement (JS) waterproof coating has the properties of water resistance, high strength and excellent ductility. The latex can be widely applied in architectural waterproof fields of interior and exterior walls of buildings, underground engineering, roofs, toilets and bathrooms and the like.

Description

technical field [0001] The invention relates to a latex for building waterproof paint and a preparation method thereof. Background technique [0002] The waterproof treatment of buildings is an important content in construction engineering, which is related to the service life of buildings, the comfort and safety of houses, etc. However, when the surface of the building is exposed to the natural environment, it will appear "powdering" and cracking due to the influence of natural factors such as temperature, dry-wet cycle, and freeze-thaw cycle. The adhesive base material currently used to improve this phenomenon is mainly acrylate copolymer latex. [0003] Acrylic latex is widely used in the preparation of architectural coatings due to its good film-forming properties, weather resistance, color retention and alkali resistance. However, it has defects such as soft coating film, poor heat resistance, and easy staining. Therefore, the modification of acrylic latex can not on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F212/08C08F230/08C08F2/30C08F2/26C04B28/00
Inventor 朱爱萍钱晓燕夏林存
Owner YANGZHOU UNIV
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