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High-elasticity acrylic ester waterproof coating preparation method

An acrylic, high-elasticity technology, applied in the direction of coating, etc., can solve problems such as shedding, poor elasticity, and affect the appearance, and achieve the effect of increasing elasticity and good water resistance

Inactive Publication Date: 2018-04-27
王琪宇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There are still deficiencies in the acrylic indoor and outdoor decorative thermal insulation and waterproof coatings produced by the above patents and known technologies, especially after the coating is formed into a film, due to poor elasticity and poor extensibility, the coating film is easily cracked and peeled off by external stress, which affects the appearance. Less than thermal insulation and waterproof effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Step 1, 20kg of 2-methyl-1,3-butadiene, 15kg of dodecyl acrylate, 0.05kg of 5H-dibenzo[A, D]cycloheptatrien-5-alcohol, Add 0.006kg of 4-methyl-4-hydroxy-5-hexenoic acid-γ-lactone and 5kg of acrylic acid into a reaction kettle with 20kg of water and 0.5kg of ammonium lauryl sulfate, and stir for 0.5h Then make a pre-emulsion for later use.

[0018] Step 2: Add 15kg of water and 0.3kg of ammonium lauryl sulfate to another reactor, stir and control the temperature to 45~50°C, then add 20% pre-emulsion and slowly drop 0.5kg into it Potassium persulfate, after the insulation reaction for 0.5h, start to slowly add the remaining pre-emulsion and 0.5kg of potassium persulfate mixture into the reactor, drop it within 3~4h, and then raise the temperature to 65~70 ℃ heat preservation reaction for 2~4 hours, then lower the temperature to 30~35℃, adjust the pH value to 6~8 with alkali, and obtain a highly elastic acrylic paint after filtration.

Embodiment 2

[0020] Step 1, 30kg of 1,3-butadiene, 20kg of dodecyl acrylate 0.01kg of 5H-dibenzo [A, D] cycloheptatrien-5-alcohol, 0.001kg of 4-methyl Add 4-hydroxy-5-hexenoic acid-γ-lactone and 7.5kg of acrylic acid into a reaction kettle with 25kg of water and 1.5kg of ammonium lauryl sulfate, stir for 1 hour and make a pre-emulsion spare.

[0021] Step 2: Add 20kg of water and 0.8kg of ammonium lauryl sulfate to another reactor, stir and control the temperature to 55~60℃, then add 35% pre-emulsion and slowly drop 0.3kg into it Potassium persulfate, after 1 hour of heat preservation reaction, slowly add the remaining pre-emulsion and 1.5kg of potassium persulfate mixture into the reactor, drop it within 3.5 hours, then raise the temperature to 70~75°C and keep it warm After reacting for 3 hours, cool down to 35-40°C, adjust the pH value to 6-8 with alkali, and obtain a high-elastic acrylate coating after filtration. Sample number KH-2.

Embodiment 3

[0023] Step 1, 45kg of 2-methyl-1,3-butadiene, 35kg of dodecyl acrylate, 0.1kg of 5H-dibenzo [A, D] cycloheptatrien-5-alcohol, 0.01kg of 4-methyl-4-hydroxyl-5-hexenoic acid-γ-lactone and 10kg of acrylic acid were added to the reactor of 30kg of water and 2.5kg of sodium dodecylbenzenesulfonate, stirred After 1.5 hours, make a pre-emulsion for later use.

[0024] Step 2: Add 25kg of water and 1.5kg of sodium dodecylbenzenesulfonate to another reaction kettle, stir and control the temperature to 60~65°C, then add 50% of the pre-emulsion and slowly add it dropwise 2kg of potassium persulfate, heat preservation reaction for 1 hour, then slowly add the remaining pre-emulsion and 2kg of potassium persulfate mixture into the reactor, dropwise within 4 hours, then raise the temperature to 80~85℃ for heat preservation reaction After 4 hours, cool down to 35-40°C, adjust the pH value to 6-8 with alkali, and obtain a high-elastic acrylic paint after filtration. Sample number KH-3.

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Abstract

The invention provides a high-elasticity acrylic ester waterproof coating preparation method. The method includes steps: adding, by mass, 20-45 parts of elastic monomer, 15-35 parts of acrylic dodecylalcohol, 0.01-0.1 part of 5H-dibenzo[A,D]cycloheptatriene-5-ol, 0.001-0.01 part of 4-methyl-4-hydroxyl-5-hexenoic acid-gamma-lactone and 5-10 parts of acrylic acid into a reaction kettle with 20-30 parts of water and 0.5-2.5 parts of an emulsifying agent, and stirring for 0.5-1.5h to obtain pre-emulsified liquid for standby application; adding water and the emulsifying agent, then adding an initiator, slowly adding residual pre-emulsified liquid neutralized initiator mixed liquid into the reaction kettle after thermal reaction, finishing dropwise adding in 3-4h, then heating to perform reaction for 2-4h, cooling to 30-40 DEG C, and adjusting a pH value to 6-8 to obtain high-elasticity acrylic ester coating.

Description

technical field [0001] The invention relates to a preparation method of a highly elastic acrylic paint, in particular to a preparation method of a high elastic acrylic waterproof paint. Background technique [0002] Acrylate polymers have excellent performance, low price, simple synthesis process, excellent weather resistance, alkali resistance, UV resistance and excellent mechanical properties, and are widely used and meet environmental protection requirements. [0003] CN105368199A discloses an environment-friendly thermal insulation acrylic paint, which is characterized in that: it contains acrylic resin; sec-butyl acetate; dimethyl carbonate; 2-ethyl butyl acetate; titanium dioxide; silicon dioxide; auxiliary fillers, additives and water; the environment-friendly thermal insulation acrylic paint provided by the invention has a service life of more than 30 years, and is environmentally friendly, safe, efficient and pollution-free. [0004] CN105860715A discloses a prep...

Claims

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Application Information

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IPC IPC(8): C08F236/08C08F236/06C08F220/18C08F220/06C08F2/26C09D147/00
CPCC08F2/26C08F236/06C08F236/08C09D147/00C08F220/1812C08F220/06
Inventor 王琪宇曹东立
Owner 王琪宇
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