Modified epoxy resin, preparation method of modified epoxy resin, emulsion preparation method of modified epoxy resin and application thereof

A technology of bisphenol epoxy resin and waterproof material, which is used in epoxy resin coatings, polyether coatings, coatings, etc., can solve the expansion and contraction reaction and decline of cement molecules, the penetration of water molecules into cement, and the stress on coatings. Splitting, aging and other problems, to achieve the effect of strong expansion and shrinkage adaptability, good anti-aging effect, excellent water resistance and physical properties

CN113004494AActive Publication Date: 2021-06-22金向红
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-06-22

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Abstract

The invention belongs to the technical field of waterproof coatings for engineering, and discloses a modified bisphenol epoxy resin, a preparation method of the modified bisphenol epoxy resin, a preparation method of an emulsion of the modified bisphenol epoxy resin and an application thereof. The product comprises a component A and a component B, the a component A is prepared from 10 to 25 parts of modified bisphenol epoxy resin emulsion according to claim 4, 10 to 90 parts of acrylate emulsion, 1 to 5 parts of water, 0.15 to 0.2 part of dispersing agent, 0.15 to 0.65 part of defoaming agent and 0.15 to 0.3 part of wetting agent, and the component B is prepared from 30 to 90 parts of cement, 30 to 60 parts of filler, 0.1 to 0.6 part of water reducing agent and 3 to 8 parts of curing agent. Compared with the prior art, the modified epoxy resin prepared by the invention has preferential adsorbability with cement particles, temperature change resistance, stronger adaptability to expansion and shrinkage of cement and better anti-aging effect, and the modified epoxy resin and the acrylate emulsion are reasonably proportioned, so that the waterproof coating disclosed by the invention is better in water resistance and physical performance, and through the synergistic effect of the MD650 epoxy resin curing agent and the MD2542 epoxy resin curing agent, the waterproof coating can be rapidly cured in a humid environment.
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Description

technical field

[0001] The invention belongs to the technical field of engineering waterproof coatings, and specifically relates to a modified epoxy resin, a preparation method and an emulsion preparation method thereof, and the application of waterproof coatings. Background technique

[0002] Polymer cement waterproof coating, referred to as JS waterproof coating, J refers to polymer, S refers to cement, so JS is polymer cement waterproof coating. Polymer cement waterproof coating is an organic liquid material composed of polyacrylate emulsion, ethylene-vinyl acetate copolymer emulsion and other polymer emulsions and various additives.

[0003] Polymer cement waterproof coating is a two-component, water-based building waterproof coating made of inorganic powder composed of cement, quartz sand, light and heavy calcium carbonate and other inorganic fillers and various additives through reasonable proportioning and compounding. In construction engineering, JS-composite waterp...

Examples

Embodiment 1

[0036] A kind of emulsion preparation method of modified bisphenol epoxy resin, its preparation step is as follows:

[0037] Step 1: Prepare 55 parts of modified bisphenol epoxy resin, 55 parts of polyethylene glycol, 1 part of TEA catalyst, 8 parts of water and 4 parts of emulsifier respectively according to parts by weight;

[0038] Step 2: Heat polyethylene glycol at 90°C to melt, add modified bisphenol epoxy resin and TEA catalyst, and stir evenly;

[0039] Step 3: Heat the evenly stirred mixture to 115° C., and maintain this temperature for 8 hours to obtain a water-based modified bisphenol epoxy resin;

[0040] Step 4: Add water and an emulsifier to the water-based modified bisphenol epoxy resin, stir and mix to prepare a modified bisphenol epoxy resin emulsion.

[0041]Wherein, the synthesis method of the modified bisphenol epoxy resin is as follows: according to the molar ratio, 1 part of bisphenol A is mixed with 0.05 part of bisphenolic acid, and then 2.14 parts of ...

Embodiment 2

[0043] A kind of emulsion preparation method of modified bisphenol epoxy resin, its preparation step is as follows:

[0044] Step 1: Prepare 70 parts of modified bisphenol epoxy resin, 30 parts of polyethylene glycol, 2 parts of TEA catalyst, 8 parts of water and 8 parts of emulsifier respectively according to parts by weight;

[0045] Step 2: Heat polyethylene glycol at 90°C to melt, add modified bisphenol epoxy resin and TEA catalyst, and stir evenly;

[0046] Step 3: Heat the evenly stirred mixture to 115° C., and maintain this temperature for 8 hours to obtain a water-based modified bisphenol epoxy resin;

[0047] Step 4: Add water and an emulsifier to the water-based modified bisphenol epoxy resin, stir and mix to prepare a modified bisphenol epoxy resin emulsion.

[0048] Wherein, the synthesis method of the modified bisphenol epoxy resin is as follows: according to the molar ratio, 1 part of bisphenol A is mixed with 0.13 part of bisphenolic acid, and then 2.3 parts of...

Embodiment 3

[0050] A kind of emulsion preparation method of modified bisphenol epoxy resin, its preparation step is as follows:

[0051] Step 1: Prepare 80 parts of modified bisphenol epoxy resin, 15 parts of polyethylene glycol, 3 parts of TEA catalyst, 8 parts of water and 10 parts of emulsifier respectively according to parts by weight;

[0052] Step 2: Heat polyethylene glycol at 90°C to melt, add modified bisphenol epoxy resin and TEA catalyst, and stir evenly;

[0053] Step 3: Heat the evenly stirred mixture to 115° C., and maintain this temperature for 8 hours to obtain a water-based modified bisphenol epoxy resin;

[0054] Step 4: Add water and an emulsifier to the water-based modified bisphenol epoxy resin, stir and mix to prepare a modified bisphenol epoxy resin emulsion.

[0055] Wherein, the synthesis method of the modified bisphenol epoxy resin is as follows: according to the molar ratio, 1 part of bisphenol A is mixed with 0.15 part of bisphenolic acid, and then 2.35 parts ...