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High-strength environment-friendly waterproof polyurethane coating and preparation method thereof

A polyurethane waterproof and high-strength technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of not involving high temperature yellowing, inability to cure film formation, difficult operation, etc., achieving low cost, overall system stability, Easy-to-save effects

Pending Publication Date: 2019-09-20
FOSHAN SHUNDE HESHENG CHEMICAL INDUSTRIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN101397475B discloses a preparation method of polyurethane high-temperature-resistant long-lasting anti-corrosion coating, but it belongs to solvent-based polyurethane system, and its evaluation performance does not involve high-temperature yellowing performance; High-temperature silicon-acrylic polyurethane coating and its preparation method, but the selected resin is silicone-modified acrylic resin, the curing agent is HDI, and does not involve specific measures for high-temperature yellowing resistance
Another example is that Chinese patent CN101481578A discloses a capacitor coating with deep drawing resistance and high temperature non-yellowing and a preparation method thereof. Cures into film at room temperature
[0003] In the prior art, there are many problems in the production and use of polyurethane waterproof coatings. For example, it is solid at room temperature, and it needs to be heated and melted during construction; self-polymerization reaction is easy to occur at room temperature, and the reaction is very fast and difficult to operate. , Difficult to store
In addition, showing the application fields of polyurethane coatings in daily life, higher requirements are put forward for polyurethane waterproof coatings, requiring their strength not less than 6.0MPa and elongation at break of more than 450%. Most of the polyurethane waterproof coatings currently on the market Coatings are difficult to meet this requirement

Method used

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  • High-strength environment-friendly waterproof polyurethane coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A high-strength environment-friendly polyurethane waterproof coating, the raw materials of which include by weight: 40 parts of modified polyurethane, 10 parts of hydrophilic modified polyisocyanate, 16 parts of polyester polyol, 7 parts of potassium tripolyphosphate, 3 parts of zinc stearate Parts, 13 parts of filler, 4-6 parts of butyl acetate, 0.1 part of film-forming aid, 0.1 part of defoamer, 0.2 part of leveling agent, 0.3 part of dispersant, 1 part of catalyst;

[0030] Wherein, the hydrophilic modified polyisocyanate is POSS modified polyethylene glycol modified polyisocyanate, and the polyisocyanate is HDI dimer.

[0031] Wherein, the film-forming aid is ethylene glycol monobutyl ether; the defoamer is a polyether modified silicone defoamer, i.e. polyether modified polydimethylsiloxane; the leveling The agent is an acrylic ester copolymer; the dispersant includes sodium polycarboxylate or ammonium polyacrylate; the catalyst is allophanate isocyanate.

[0032] ...

Embodiment 2

[0040] A high-strength environment-friendly polyurethane waterproof coating, the raw materials of which include by weight: 40-50 parts of modified polyurethane, 20 parts of hydrophilic modified polyisocyanate, 22 parts of polyester polyol, 10 parts of potassium tripolyphosphate, stearic acid 5 parts of zinc, 25 parts of filler, 6 parts of butyl acetate, 1 part of film-forming aid, 0.4 part of defoamer, 0.5 part of leveling agent, 0.6 part of dispersant, 10 parts of catalyst;

[0041] Wherein, the hydrophilic modified polyisocyanate is POSS modified polyethylene glycol modified polyisocyanate, and the polyisocyanate is selected from HDI dimer, HDI trimer, IPDI dimer, IPDI trimer kind of.

[0042] The film-forming aid is mixed in any ratio of lauryl alcohol ester and propylene glycol butyl ether; the defoamer is a polyether modified silicone defoamer, which is polyether modified Methylsiloxane; the leveling agent is an acrylic copolymer; the dispersant is polycarboxylate sodium s...

Embodiment 3

[0050] A high-strength environment-friendly polyurethane waterproof coating, the raw materials of which include by weight: 45 parts of modified polyurethane, 15 parts of hydrophilic modified polyisocyanate, 20 parts of polyester polyol, 8 parts of potassium tripolyphosphate, 4 parts of zinc stearate 20 parts, 20 parts of filler, 5 parts of butyl acetate, 0.6 parts of coalescent, 0.3 parts of defoamer, 0.4 parts of leveling agent, 0.4 parts of dispersant, 6 parts of catalyst;

[0051] Wherein, the hydrophilic modified polyisocyanate is POSS modified polyethylene glycol modified polyisocyanate, and the polyisocyanate is selected from HDI dimer, HDI trimer, IPDI dimer, IPDI trimer kind of.

[0052] The film-forming aid is a mixture of ethylene glycol monobutyl ether, lauryl alcohol ester and propylene glycol butyl ether in any proportion; the defoamer is a polyether modified silicone defoamer, which is polyether in this embodiment Modified polydimethylsiloxane; the leveling agen...

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Abstract

The invention discloses a high-strength environment-friendly waterproof polyurethane coating and a preparation method thereof. The high-strength environment-friendly waterproof polyurethane coating comprises the following raw materials by weight: modified polyurethane, hydrophilic modified polyisocyanate, polyester polyol, potassium tripolyphosphate, zinc stearate, a filler, butyl acetate, a film forming aid, an antifoaming agent, a leveling agent, a dispersing agent and a catalyst, wherein the hydrophilic modified polyisocyanate is POSS-modified polyethylene glycol-modified polyisocyanate. The waterproof polyurethane coating comprehensively prepared from modified components through mixing in steps is more environmentally friendly and has better film properties, and the prepared waterproof polyurethane coating can meet the requirements for high strength and water resistance; and the coating with better performance is liquid at normal temperature, and is convenient to use, easy to store, simple in preparation process and low in cost.

Description

technical field [0001] The invention relates to the field of polyurethane waterproof coatings, in particular to a high-strength environment-friendly polyurethane waterproof coating and a preparation method thereof. Background technique [0002] Polyurethane resin is one of the main types of coating base materials at the present stage. Polyurethane has a structure of soft and hard segment front-end copolymers. This unique structure makes polyurethane products have excellent comprehensive mechanical properties: good mechanical properties, aging resistance, oil resistance, hardness The adjustable range is large, and these excellent properties are unmatched by many other materials. Polyurethane coatings are generally used at temperatures above zero degrees Celsius, but for some areas in northern my country, the winter temperature is zero degrees or even below zero, which requires polyurethane coatings to have high low temperature flexibility. Adding special polyols to modify po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D175/06C09D7/61C09D7/65C08G18/77C08G18/42
CPCC08G18/42C08G18/778C08K2003/324C08L2205/035C09D7/61C09D7/65C09D7/70C09D175/04C08L75/06C08L83/12C08L33/04C08K13/04C08K3/32C08K5/098C08K5/06C08K7/26
Inventor 陆浩然钟标何锦华
Owner FOSHAN SHUNDE HESHENG CHEMICAL INDUSTRIAL CO LTD
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