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High polymer waterproofing agent and synthesis method and application thereof

A technology of polymer waterproofing and synthesis method, which is applied in the field of polymer waterproofing agent and its synthesis, can solve the problems of cracking, accelerated cement curing, and high cost of use, and achieves the effects of simple process route, improved compressive strength, and increased waterproof performance.

Active Publication Date: 2015-02-11
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most mortar waterproofing agents have some defects more or less
For example, although alum has certain water resistance, its addition will accelerate the cement solidification, easily cause cracking, and affect the strength of cement mortar; ferric chloride waterproofing agents contain chloride ions, which are easy to corrode steel materials; silicone and resin emulsion The waterproofing agent needs to be added in a large amount (generally more than 5% of the cementitious material) to show the ideal waterproof performance, the cost of use is too high and it is easy to weaken the strength of cement mortar

Method used

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  • High polymer waterproofing agent and synthesis method and application thereof
  • High polymer waterproofing agent and synthesis method and application thereof
  • High polymer waterproofing agent and synthesis method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1) Preparation of intermediates: 100.0 grams of polyethylene glycol (molecular weight 600), 51.7 grams of oleic acid, and 1.2 grams of p-toluenesulfonic acid were put into the reactor, heated to 110°C, and kept for 4 hours to obtain oleic acid polymer. Glycol esters.

[0025] (2) Preparation of polymer waterproofing agent: 100 grams of step (1) gained oleic acid polyethylene glycol ester, 10.8 grams of acrylic acid are dissolved in 105 grams of water, evenly drip 25 grams of ammonium persulfate aqueous solution ( Concentration 5.5%), dropwise adding time 100 minutes, keep warm at 65°C for 3 hours after dropwise addition, then cool down to 45°C, add NaOH to neutralize, adjust system pH to 7-8, and obtain polymer waterproofing agent.

Embodiment 2

[0027] (1) Preparation of intermediates: 100.0 grams of polyethylene glycol (molecular weight 2400), 12.5 grams of oleic acid, and 1.2 grams of p-toluenesulfonic acid were put into the reactor, heated to 100°C, and kept for 4 hours to obtain oleic acid polymer Glycol esters.

[0028] (2) Preparation of polymer waterproofing agent: 100 grams of step (1) gained oleic acid polyethylene glycol ester, 3.0 grams of acrylic acid are dissolved in 110 grams of water, evenly drip 25 grams of ammonium persulfate aqueous solution ( Concentration 5.5%), dropwise adding time 100 minutes, keep warm at 65°C for 4 hours after dropwise addition, then cool down to 45°C, add NaOH to neutralize, adjust system pH to 7-8, and obtain polymer waterproofing agent.

[0029] Gel permeation chromatography test results (see figure 2 ) found that the molecular weight distribution of the sample was relatively uniform, with an average molecular weight of about 180,000.

Embodiment 3

[0031] (1) Preparation of intermediates: 100.0 grams of polyethylene glycol (molecular weight 10,000), 3.1 grams of oleic acid, and 1.7 grams of p-toluenesulfonic acid were put into the reactor, heated to 105°C, and kept for 5 hours to obtain oleic acid polymer. Glycol esters.

[0032] (2) Preparation of polymer waterproofing agent: 100 grams of step (1) gained oleic acid polyethylene glycol ester, 1.05 grams of acrylic acid are dissolved in 105 grams of water, evenly drip 23 grams of ammonium persulfate aqueous solution ( Concentration 6.0%), dropwise adding time 120 minutes, keep warm at 60°C for 2 hours after dropwise addition, then cool down to 45°C, add NaOH to neutralize, adjust system pH to 7-8, and obtain polymer waterproofing agent.

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Abstract

The invention belongs to the technical field of waterproofing of buildings, and discloses a high polymer waterproofing agent and a synthesis method and an application thereof. The preparation method comprises the following steps: feeding polyethylene glycol, oleic acid and p-toluenesulfonic acid to a reaction kettle, and heating to obtain oleic acid polyglycol ester; dissolving oleic acid polyglycol ester and acrylic acid into water; evenly dropwise adding an ammonium persulfate solution; neutralizing the system after heat preservation for a certain period of time, so as to prepare the waterproofing agent. The high polymer waterproofing agent is capable of cutting off and sealing capillary tubes on a mortar surface in the cement solidification process, and reducing gaps in mortar, so as to effectively increase the waterproofness of the mortar system. The waterproofing agent disclosed by the invention does not contain chloridion; the compressive strength of the mortar is improved by reducing water consumption; the defects that a traditional waterproofing agent easily corrodes a reinforcing steel material, and negatively affects the strength of cement mortar are effectively overcome.

Description

technical field [0001] The invention belongs to the technical field of building waterproofing, in particular to a polymer waterproofing agent and its synthesis method and application. Background technique [0002] Building waterproofing refers to measures taken from building materials or structures to prevent water from penetrating certain parts of buildings. Material waterproofing is to rely on building materials to block the passage of water to achieve the purpose of anti-leakage, including membrane waterproofing, coating waterproofing, concrete and mortar waterproofing, etc. In construction projects, cement mortar is often used for wall masonry and interior and exterior plastering. Due to its high construction efficiency, moderate cost, and good durability, waterproof mortar has a very broad application prospect. [0003] Mortar waterproofing agents can be roughly divided into two types: inorganic compounds and organic compounds. Inorganic compounds include ferric chlo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C08F220/06C04B24/26
Inventor 吴昆黄晓梅胡文光史珺罗志有吕满庚
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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