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Mercapto-terminated polyurethane modified epoxy mortar and preparation method thereof

A polyurethane modification and mercapto-terminated technology, which is applied in the field of building materials, can solve the problems of long curing period, easy foaming, and difficult complete curing, etc., and achieve the effects of fast curing speed, improved toughness, and good adhesion

Active Publication Date: 2020-11-20
河南聚研材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the composite modification of the two often has the problems of long curing period, difficulty in complete curing in low temperature and humid environment, and easy foaming.

Method used

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  • Mercapto-terminated polyurethane modified epoxy mortar and preparation method thereof
  • Mercapto-terminated polyurethane modified epoxy mortar and preparation method thereof
  • Mercapto-terminated polyurethane modified epoxy mortar and preparation method thereof

Examples

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Embodiment 1

[0032] A kind of epoxy mortar modified by mercapto-terminated polyurethane, made of mercapto-terminated polyurethane, epoxy resin, accelerator and quartz sand, the mass ratio of mercapto-terminated polyurethane, epoxy resin, accelerator and quartz sand is 1 :0.8:0.02:7; wherein, the epoxy resin is formed by mixing bisphenol A epoxy resin E44 and diglycidyl ether in a mass ratio of 4:1, and the accelerator is 1,8-diazepine Bicyclo[5,4,0]undec-7-ene, the particle size of the quartz sand is 70-140 mesh.

[0033] The preparation method of described mercapto-terminated polyurethane is:

[0034] a. Add isophorone diisocyanate (19.03g), polyether N-210 (21.11g) and dibutyltin dilaurate (0.15g) into the reaction vessel, react at 80°C for 5h; then add dimethylol Propionic acid solution (3.02g) was reacted at 80°C for 5h; wherein, the mass ratio of isophorone diisocyanate to polyether N-210, dibutyltin dilaurate, and dimethylol propionic acid solution was 1:1.1 :0.008:0.16, dimethylol...

Embodiment 2

[0038] The content of embodiment 2 is basically the same as embodiment 1, and its difference is:

[0039] In the preparation method of the mercapto-terminated polyurethane: the mass ratio of isophorone diisocyanate to polyether N-210, dibutyltin dilaurate, and dimethylol propionic acid solution is 1:1.1:0.008:0, namely The amount of chain extender—dimethylol propionic acid solution is 0 g.

Embodiment 3

[0041] The content of embodiment 3 is basically the same as embodiment 1, and its difference is:

[0042]In the preparation method of the mercapto-terminated polyurethane: the mass ratio of isophorone diisocyanate to polyether N-210, dibutyltin dilaurate, and dimethylol propionic acid solution is 1:1.1:0.008:0.08, namely The amount of chain extender—dimethylolpropionic acid solution is 1.52g, and the dimethylolpropionic acid solution is prepared with N-methylpyrrolidone as a solvent, and its concentration is 30%.

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Abstract

The invention relates to the field of building materials, in particular to mercapto-terminated polyurethane modified epoxy mortar and a preparation method thereof. The epoxy mortar is prepared from sulfydryl-terminated polyurethane, epoxy resin, an accelerant and aggregate, wherein the mass ratio of the sulfydryl-terminated polyurethane to the epoxy resin to the accelerant to the aggregate is 1: (0.4-1): (0-0.02): (6-8). The preparation method of the thiol-terminated polyurethane modified epoxy mortar comprises the following steps: sequentially adding the epoxy resin, the accelerant and the aggregate into the thiol-terminated polyurethane while stirring, and stirring at a high speed until the mixture is uniformly dispersed after the addition is finished, thereby obtaining the thiol-terminated polyurethane modified epoxy mortar. The prepared mercapto-terminated polyurethane modified epoxy mortar can be completely cured within 20 min in a low-temperature humid environment of -10 DEG C to5 DEG C, the curing speed is high, and the construction performance is good, and moreover, the cured coating is high in strength, good in toughness, good in cohesiveness with a basal plane, excellentin durability and free of blistering.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a mercapto-terminated polyurethane modified epoxy mortar and a preparation method thereof. Background technique [0002] Ordinary mortar has a low tension-compression ratio, large dry shrinkage deformation, poor impermeability, crack resistance, corrosion resistance, and high density, so its application range is greatly limited. With the development of industry, in order to further improve the performance of mortar, it is necessary to improve the performance of cementing materials, so polymer mortar appeared. [0003] At present, there are mainly two kinds of polymer mortars that are widely used: one is epoxy resin mortar; the other is polyurethane mortar; however, the toughness of single epoxy resin mortar is poor, and the strength of single polyurethane mortar is not enough. Therefore, the research on the compound modification of the two has become a hot spot. Epoxy resin ha...

Claims

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Application Information

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IPC IPC(8): C04B26/16C08G18/75C08G18/48C08G18/10C08G18/32C08G18/38C04B111/76
CPCC04B26/16C08G18/755C08G18/4825C08G18/10C04B2201/50C04B2201/10C04B2111/76C08G18/348C08G18/3876C04B24/281C04B24/128C04B14/06
Inventor 杜祥建王国强苏畅黄正强赵艳张向杰杜金波冯中珂胡宝通
Owner 河南聚研材料科技有限公司
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