Low agglomerate waterproof emulsion and preparation method thereof

A technology of waterproof emulsion and condensate, applied in the direction of coating, etc., can solve the problems of increased MFFT of emulsion products, increased post-processing costs, and decreased water resistance of latex films, so as to save material costs and construction costs, and have high promotional value. good weather resistance

Active Publication Date: 2017-03-08
北京宝辰联合科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional styrene-acrylic emulsion is mainly formed by copolymerization of styrene, butyl acrylate and a small amount of functional monomers. During the reaction process, the α-H group of the styrene chain segment is very active, and it is easy to combine with acrylate monomer when the amount is large. The detonation of the body will cause a large amount of structural gel to be produced on the inner wall of the polymerization reactor and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A low coagulation waterproof emulsion, comprising the following components in mass percentage: 15% styrene, 5% methyl methacrylate, 10% n-butyl acrylate, 20% 2-ethylhexyl acrylate, methacrylic acid 1.5%, N-Methylol Acrylamide 0.2%, Glycidyl Methacrylate 0.5%, Alkyl Polyoxyethylene Ether Sodium Sulfate 0.5%, Alkyl Polyoxyethylene Ether 0.5%, Allyloxy Fatty Alcohol Polyoxygen Vinyl ether 1%, sodium bicarbonate 0.4%, tert-butyl hydroperoxide 0.2%, L-ascorbic acid 0.2%, deionized water 45%.

[0024] The preparation method of above-mentioned low coagulation waterproof emulsion, comprises the following steps:

[0025] (1) Pre-emulsification stage: Stir and mix the emulsifier accounting for 80% of the total amount and deionized water accounting for 30% of the total amount at room temperature, and then mix styrene, methyl methacrylate, n-butyl acrylate, acrylic acid -The mixture of 2-ethylhexyl ester, methacrylic acid, N-methylolacrylamide, glycidyl methacrylate and 90% tert-b...

Embodiment 2

[0032] A low coagulation waterproof emulsion, comprising the following components in mass percentage: 10% styrene, 8% methyl methacrylate, 20% n-butyl acrylate, 10% 2-ethylhexyl acrylate, 0.3% acrylic acid , methacrylic acid 1.2%, acrylamide 0.5%, glycidyl methacrylate 1.5%, alkyl polyoxyethylene ether sodium sulfate 0.2%, alkyl diphenyl ether disulfonate 0.4%, alkyl polyoxyethylene ether 1%, allyloxy fatty alcohol polyoxyethylene ether 1%, sodium bicarbonate 0.3%, sodium carbonate 0.1%, tert-butyl hydroperoxide 0.25%, L-ascorbic acid 0.25%, deionized water 45%.

[0033] The preparation method of above-mentioned low coagulation waterproof emulsion, comprises the following steps:

[0034] (1) Pre-emulsification stage: Stir and mix the emulsifier accounting for 90% of the total amount and the deionized water accounting for 30% of the total amount at room temperature, and then mix styrene, methyl methacrylate, n-butyl acrylate, acrylic acid - The mixture of 2-ethylhexyl ester, a...

Embodiment 3

[0041] A low coagulation waterproof emulsion, comprising the following components in mass percentage: 18% styrene, 2% methyl methacrylate, 15% n-butyl acrylate, 15% 2-ethylhexyl acrylate, 0.5% acrylic acid , methacrylic acid 0.6%, acrylamide 1%, sodium alkyl polyoxyethylene ether sulfate 0.25%, allyloxy fatty alcohol polyoxyethylene ether sodium sulfate 0.25%, alkyl polyoxyethylene ether 1.5%, sodium bicarbonate 0.1%, sodium carbonate 0.2%, tert-butyl hydroperoxide 0.3%, L-ascorbic acid 0.3%, deionized water 45%.

[0042] The preparation method of above-mentioned low coagulation waterproof emulsion, comprises the following steps:

[0043] (1) Pre-emulsification stage: Stir and mix the emulsifier accounting for 80% of the total amount and deionized water accounting for 30% of the total amount at room temperature, and then mix styrene, methyl methacrylate, n-butyl acrylate, acrylic acid - The mixture of 2-ethylhexyl ester, acrylic acid, methacrylic acid, acrylamide and 90% of t...

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Abstract

The invention discloses a low agglomerate waterproof emulsion. The emulsion comprises the following components, by mass, styrene 10-18%, methyl methacrylate 2-8%, n-butyl acrylate 8-20%, 2-ethylhexyl acrylate 10-20%, organic acid 0.5-1.5%, functional monomer 0.6-2%, emulsifier 2-3%, pH buffer 0.2-0.4%, redox initiator 0.4-0.8%, and the balance of deionized water. The waterproof emulsion does not contain APEO, and the components scientifically cooperate with each other and have a synergistic effect. Thus the temperature of the emulsion application is suitable for a wide range. The coating film has high bonding strength with base surfaces such as cement, asphalt and polyurethane, and has good water resistance, alkali resistance and weather resistance. Meanwhile, the emulsion has excellent resilience, high practicability, and extremely high promotional value. By optimizing the ratio and the adding method of the emulsifier in a polymerization reaction stage, the preparation method of the waterproof emulsion generates a low amount of aggregates (& lt; 20 ppm), and greatly saves the cost of materials and construction.

Description

technical field [0001] The invention belongs to the technical field of building waterproofing, and in particular relates to a low-condensate waterproof emulsion and a preparation method thereof. Background technique [0002] Compared with pure acrylate copolymers, copolymers of styrene and acrylate monomers have better water resistance, alkali resistance, and higher cost performance, which makes styrene-acrylic emulsions widely used in architectural concrete structures . The flexible polymer network formed by the styrene-acrylic emulsion film can fill the capillary pores formed by the cement during the hydration process, bridge the micro-cracks, and improve the cohesion of the entire concrete structure. Its unique properties are especially suitable for the field of building waterproofing. [0003] The traditional styrene-acrylic emulsion is mainly formed by copolymerization of styrene, butyl acrylate and a small amount of functional monomers. During the reaction process, th...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F212/08C08F220/14C08F220/06C08F220/32C08F220/58C08F220/56C08F2/26C08F2/30C09D133/08C09D125/14
CPCC08F2/26C08F2/30C08F212/08C08F220/18C08F220/1804C08F220/1818C09D125/14C09D133/08C08F220/14C08F220/06C08F220/56C08F220/325C08F220/58
Inventor 杨家东
Owner 北京宝辰联合科技股份有限公司
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