Synthetic method of waterproof acrylate emulsion

A technology of waterproof emulsion and synthesis method, applied in the direction of coating, etc., can solve the problems of phase separation and low stability of emulsion, and achieve the effects of stable reaction, low gel rate and good stability

Inactive Publication Date: 2016-02-24
GUILIN HEXIN WATERPROOF DECORATION MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the organosilicon compound does not form a whole with the acrylic polymer in the chemical structure, so the stability of the emulsion is not high, and phase separation is easy to occur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) In parts by weight, take 2 parts of emulsifier (composed of 30% DSB and the balance of OP-10 in terms of mass percentage) and 50 parts of water in an emulsification kettle, stir until the emulsifier dissolves Then add 15 parts of acrylic acid monomer (composed of 10 parts of butyl acrylate and 5 parts of propylene isooctyl) for emulsion polymerization, the reaction temperature is 80°C, and the reaction time is 30 minutes to obtain a pre-emulsion;

[0017] 2) Take 0.2 parts of emulsifier (composed of 30% DSB and the balance of OP-10 in terms of mass percentage) and 9 parts of water in the reaction kettle, raise the temperature to 90°C, and add 60 parts of pre-emulsion , 0.5 parts of initiator (sodium persulfate) and 2 parts of silane coupling agent KBM-503, heat preservation reaction for 2 hours, then lower the temperature to 75°C and heat preservation reaction for 30 minutes, then cool down to room temperature, adjust the reaction with disodium hydrogen phosphate The...

Embodiment 2

[0019] 1) In parts by weight, take 5 parts of emulsifier (composed of 40% DSB and the balance of OP-10 in terms of mass percentage) and 70 parts of water in an emulsification tank, stir until the emulsifier dissolves Then add 25 parts of acrylic acid monomer (composed of 10 parts of butyl acrylate, 5 parts of propylene isooctyl and 10 parts of methacrylic acid) to carry out emulsion polymerization, the reaction temperature is 65 ℃, and the reaction time is 60min to obtain the prepared lotion;

[0020] 2) Take 1.0 parts of emulsifier (by mass percentage, composed of 50% DSB and the balance of OP-10) and 8 parts of water in the reaction kettle, heat up to 85 ° C, add 55 parts of pre-emulsion , 0.3 parts of initiator (sodium persulfate) and 4 parts of silane coupling agent KBM-503, heat preservation reaction for 2 hours, then lower the temperature to 70°C and heat preservation reaction for 40 minutes, then lower to room temperature, adjust the reaction with disodium hydrogen phos...

Embodiment 3

[0022] 1) In parts by weight, take 8 parts of emulsifier (composed of 35% DSB and the balance of OP-10 by mass percentage) and 60 parts of water in an emulsification kettle, stir until the emulsifier dissolves Then add 10 parts of acrylic acid monomer (butyl acrylate) for emulsion polymerization, the reaction temperature is 75° C., and the reaction time is 40 minutes to obtain a pre-emulsion;

[0023] 2) Take 0.5 parts of emulsifier (by mass percentage, composed of 45% DSB and the balance of OP-10) and 10 parts of water in the reaction kettle, heat up to 88 ° C, add 50 parts of pre-emulsion , 0.3 parts of initiator (ammonium persulfate) and 4 parts of silane coupling agent KBM-503, heat preservation reaction for 1.5h, then lower the temperature to 65°C and heat preservation reaction for 30min, then lower to room temperature, adjust the reactant with sodium dihydrogen phosphate The pH value was 8.5, and filtered to obtain an acrylate waterproof emulsion.

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PUM

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Abstract

The invention discloses a synthetic method of a waterproof acrylate emulsion. The synthetic method comprises the following steps: 1) 2-8 parts by weight of an emulsifier and 50-70 parts by weight of water are placed in an emulsification kettle, 10-25 parts of an acrylic monomer are added for polymerization after the emulsifier is dissolved, and a pre-emulsion is obtained; 2) 0.2-1.0 part of the emulsifier and 8-10 parts of the water are placed into a reaction kettle and heated to 85-90 DEG C, 50-60 parts of the pre-emulsion, 0.2-1.0 part of an initiator and 2-5 parts of a silane coupling agent KBM-503 are added, the mixture reacts under a heat preservation condition for 1-2 h, then the temperature is reduced to 65-75 DEG C, reaction is performed under the heat preservation condition for 20-60 min, cooling is performed, the pH value of a reactant is regulated to 8-9, filtering is performed, and a product is obtained, wherein the emulsifier comprises 30%-50% by mass of DSB and the balance of the emulsifier OP-10. The emulsion has good stability and lower gel rate and only contains very few coagula.

Description

technical field [0001] The invention relates to a waterproof paint, in particular to a method for synthesizing an acrylate waterproof emulsion. Background technique [0002] Polymer cement waterproof coating (JS waterproof coating) is a two-component waterproof coating composed of polymer emulsion (such as acrylate emulsion, EVA emulsion, etc.) and inorganic powder (cement, quartz powder and additives, etc.). The extensibility and water resistance of the polymer coating film also have the advantages of high strength of the hydraulic cementitious material and easy bonding with the wet base, so it is widely used in toilets, kitchens, building exterior walls, sloping tile roofs, and underground projects waterproof. [0003] Since the acrylate emulsion is sensitive to temperature, the low-temperature flexibility of the prepared JS waterproof coating film is relatively poor, and it is difficult to meet the application requirements in the cold climate in northern winter. For man...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/06C08F230/08C08F2/30C08F2/26C09D133/08C09D133/02
CPCC09D133/02C09D133/08C08F2/26C08F2/30C08F220/06C08F220/18C08F220/1804C08F220/1808C08F230/08
Inventor 黄志强王继发刘泓铭
Owner GUILIN HEXIN WATERPROOF DECORATION MATERIAL
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