Epoxy modified polyurethane waterproof coating and preparation method thereof

A technology of polyurethane waterproofing and epoxy modification, applied in the field of coatings, can solve problems such as unsatisfactory thixotropic effect, poor construction, and increased viscosity, and achieve the effects of improving anti-sag performance, anti-settling, and increasing viscosity

Active Publication Date: 2020-04-03
苏州市铭龙化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyurethane is a polar material, and thixotropic agents such as fumed white carbon black, hydrogenated castor oil and its derivatives, organic bentonite, etc. have unsatisfactory thixotropic effects in polyurethane systems, and there are defects such as increased viscosity and poor construction.

Method used

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  • Epoxy modified polyurethane waterproof coating and preparation method thereof

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Comparison scheme
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Embodiment 1

[0024] This embodiment provides a kind of epoxy resin modified polyurethane waterproof coating, and described coating comprises the composition of following parts by weight, epoxy modified polyether polyol 40 parts, isophorone diisocyanate 10 parts, bicyclic 8 parts of hexylmethane diisocyanate, 13 parts of glycerol triacetate, 40 parts of modified nano-silica, 3 parts of 2-isopropyl oxazolidine, 1 part of dibutyltin dilaurate, polyether modified organic 0.3 parts of silicon defoamer, 3 parts of modified fumed silica;

[0025] The preparation method of the epoxy-modified polyurethane waterproof coating mainly comprises the steps:

[0026] (1) In a closed reactor with high-speed stirring, add 400 g of epoxy-modified polyether polyols, 130 g of glycerol triacetate, and 400 g of modified nano-silicon dioxide in sequence, stir rapidly and raise the temperature to 100 -105°C, turn on the vacuum pump and pump for 2-3 hours below -0.08MPa to completely remove the moisture in the sys...

Embodiment 2

[0030] The present embodiment provides a kind of epoxy resin modified polyurethane waterproof coating, described coating comprises the composition of following parts by weight, epoxy modified polyether polyol 35 parts, isophorone diisocyanate 8 parts, hexaethylene 10 parts of methyl diisocyanate, 15 parts of glycerol triacetate, 35 parts of modified nano-silica, 2 parts of 2,2-dihydrooxazolidine, 1 part of dibutyltin acetate, polyether modified silicone 0.3 parts of foaming agent, 4 parts of modified fumed silica;

[0031] The preparation method of described waterproof paint is with embodiment 1.

Embodiment 3

[0033] This embodiment provides a kind of epoxy resin modified polyurethane waterproof coating, the coating comprises the composition of following parts by weight, epoxy modified polyether polyol 45 parts, xylylene diisocyanate 7 parts, six 8 parts of methylene diisocyanate, 15 parts of chlorinated paraffin, 45 parts of modified nano-alumina, 2 parts of 2,2-dihydrooxazolidine, 1 part of dibutyltin dilaurate, polyether modified silicone 0.3 parts of foaming agent, 1 part of modified fumed silica;

[0034] The preparation method of described waterproof paint is with embodiment 1.

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Abstract

The invention belongs to the technical field of coatings, and particularly relates to an epoxy resin modified polyurethane waterproof coating which is prepared from the following components in parts by weight: 30-50 parts of epoxy modified polyether polyol, 10-20 parts of a polyisocyanate monomer, 10-20 parts of a plasticizer, 30-50 parts of a solid filler, 1-5 parts of a latent curing agent, 0.3-3 parts of a catalyst, 0.1-2 parts of a defoaming agent and 1-5 parts of an anti-sagging agent. The epoxy resin modified polyurethane waterproof coating has the following beneficial effects: (1) E-51epoxy resin is used for graft modification of the polyether polyol mixture, so the viscosity of the coating system is improved; (2) the modified solid filler and polyether have a relatively strong bonding effect, so that the sedimentation resistance and sagging resistance are further improved; and (3) the coating system prepared by the invention greatly improves the process performance and the mechanical property by modifying various components.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to an epoxy-modified polyurethane waterproof coating and a preparation method thereof. Background technique [0002] Paint is a chemical product made of resin and oil, with or without pigment. Applying the paint on the surface of the object can dry and form a film, which isolates the surface of the coated object from the environmental medium, thus playing a role of protection and decoration for the coated object. [0003] Polyurethane waterproof coating belongs to chemical reaction type waterproof coating. After curing, it is a kind of rubber-like high-elastic coating film. This material is widely used in the world because of its excellent comprehensive performance. According to its composition and curing mechanism, polyurethane waterproof coatings can be divided into two categories: single-component and multi-component. The on-site construction of multi-component pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D7/62C08G18/48C08G18/75C08G18/73C08G18/76
CPCC08G18/4812C08G18/4825C08G18/4829C08G18/722C08G18/724C08G18/73C08G18/755C08G18/758C08G18/7642C08K2003/2227C09D175/08C09D7/62C08K5/103C08K9/06C08K3/36C08K9/08C08K7/26C08L91/06C08K3/22C08K3/34
Inventor 唐丽琪胡军
Owner 苏州市铭龙化学有限公司
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