News Details
Crosslinking agent for waterborne polyurethane coating in construction
2017-6-29 17:16:40
Crosslinking agent for waterborne polyurethane coating in construction
Polyurethane coating has extensive application and research in the field of construction, and its development has been developed from the original solvent to the water based on the increasing importance of environmental protection and energy saving.
Compared with the solvent - based polyurethane coating, waterborne polyurethane (WPU) coating has the advantages of non-toxic, pollution-free environment, energy saving and resources, etc., and belongs to the present green polymer material.
In recent years, due to the rapid growth of the social economy and the continuous development of the construction industry, the construction coatings have been paid more and more attention, and have become the fastest growing coatings in the coating industry. WPU coating combines the advantages of high adhesion, abrasion resistance and solvent resistance of polyurethane resins with low VOC content of waterborne coatings and plays a pivotal role in the construction market.
The application of waterborne polyurethane coating in the field of construction. Architectural coatings are widely used in building decoration and protection, can resist the external environment are the requirements for the destruction of buildings, mouldproof, who will take care of the building fire prevention, waterproof, anti-fouling, thermal insulation, corrosion protection function; What's more important is low toxicity or non-toxic, non-flammable, and sufficient safety for humans.
WPU coating has the advantages of gloss, flexibility, weathering and solvent resistance, as well as non-toxic and environmental protection.
Floor coating is a kind of coating that applies to cement at the base level, the requirement has wear-resisting, anti-skid, corrosion-resistant, anti-stain and so on the performance. WPU coating has the advantages of flexibility and environmental protection, and the share of the floor space is increasing.
For single component WPU, it is necessary to obtain excellent mechanical properties, water resistance, solvent resistance and aging resistance by crosslinking modification, so as to meet the requirements of floor coatings.
The dual-component WPU has a wide range of applications, such as easy cleaning, abrasion resistance, abrasion resistance and chemical resistance, etc. The two-component WPU floor coating is composed of two groups of the OH group and the polyisocyanate NCO group.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.
The results showed that the selection of organic siloxane monomers, hydroxyl content, acid value and curing agent had significant influence on film performance. When siloxane monomer mass fraction is 5% ~ 10%, hydroxyl content is 5% ~ 3.0%, the acid value of 25 ~ 36 mgkoh/g, glass transition temperature of 40 ~ 58 ℃ under the condition of synthesis of high performance silicon containing hydroxyl acrylic resin, the floor coating film with the curing agent makes best performance; Its coating is hard and durable, it has good water resistance, corrosion resistance, scratch resistance and scrubbing resistance.
As long as the selected materials are properly selected, the dual-component WPU coatings can achieve excellent comprehensive performance. The latest research shows that some high-crosslinked WPU floor coatings have excellent performance of thermal tyre resistance.
It is important to improve the stain resistance of elastic latex coatings mainly by selecting the emulsion varieties and adjusting the formulation of coatings and proper coating design.
Surface self-crosslinking emulsion. Introduced in the elastic emulsion crosslinking agent, when the elastic latex paint dry film, through crosslinking reaction, forming a certain surface crosslinking density, improve surface Tg values, basic does not affect the elasticity of the film, and improved the hardness, so as to improve the stain resistance of the coating.
Nucleo-shell emulsion polymerization flexible emulsion. And common core - shell emulsion on the contrary, the elastic core - shell emulsion polymerization, the nuclear for soft monomer, shell as hard monomer, soft core mainly provide flexibility, crust is mainly to improve surface Tg values, improving the contamination resistance of coating. There is also a combination of surface self-crosslinking and nucleo-shell emulsion polymerization to produce elastic lotions.
Silicone modified elastic emulsion. By means of preemulsifying continuous addition and seed polymerization of silicone modified elastic emulsion, it is reported that the former is better than the latter.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Polyurethane coating has extensive application and research in the field of construction, and its development has been developed from the original solvent to the water based on the increasing importance of environmental protection and energy saving.
Compared with the solvent - based polyurethane coating, waterborne polyurethane (WPU) coating has the advantages of non-toxic, pollution-free environment, energy saving and resources, etc., and belongs to the present green polymer material.
In recent years, due to the rapid growth of the social economy and the continuous development of the construction industry, the construction coatings have been paid more and more attention, and have become the fastest growing coatings in the coating industry. WPU coating combines the advantages of high adhesion, abrasion resistance and solvent resistance of polyurethane resins with low VOC content of waterborne coatings and plays a pivotal role in the construction market.
The application of waterborne polyurethane coating in the field of construction. Architectural coatings are widely used in building decoration and protection, can resist the external environment are the requirements for the destruction of buildings, mouldproof, who will take care of the building fire prevention, waterproof, anti-fouling, thermal insulation, corrosion protection function; What's more important is low toxicity or non-toxic, non-flammable, and sufficient safety for humans.
WPU coating has the advantages of gloss, flexibility, weathering and solvent resistance, as well as non-toxic and environmental protection.
Floor coating is a kind of coating that applies to cement at the base level, the requirement has wear-resisting, anti-skid, corrosion-resistant, anti-stain and so on the performance. WPU coating has the advantages of flexibility and environmental protection, and the share of the floor space is increasing.
For single component WPU, it is necessary to obtain excellent mechanical properties, water resistance, solvent resistance and aging resistance by crosslinking modification, so as to meet the requirements of floor coatings.
The dual-component WPU has a wide range of applications, such as easy cleaning, abrasion resistance, abrasion resistance and chemical resistance, etc. The two-component WPU floor coating is composed of two groups of the OH group and the polyisocyanate NCO group.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.
The results showed that the selection of organic siloxane monomers, hydroxyl content, acid value and curing agent had significant influence on film performance. When siloxane monomer mass fraction is 5% ~ 10%, hydroxyl content is 5% ~ 3.0%, the acid value of 25 ~ 36 mgkoh/g, glass transition temperature of 40 ~ 58 ℃ under the condition of synthesis of high performance silicon containing hydroxyl acrylic resin, the floor coating film with the curing agent makes best performance; Its coating is hard and durable, it has good water resistance, corrosion resistance, scratch resistance and scrubbing resistance.
As long as the selected materials are properly selected, the dual-component WPU coatings can achieve excellent comprehensive performance. The latest research shows that some high-crosslinked WPU floor coatings have excellent performance of thermal tyre resistance.
It is important to improve the stain resistance of elastic latex coatings mainly by selecting the emulsion varieties and adjusting the formulation of coatings and proper coating design.
Surface self-crosslinking emulsion. Introduced in the elastic emulsion crosslinking agent, when the elastic latex paint dry film, through crosslinking reaction, forming a certain surface crosslinking density, improve surface Tg values, basic does not affect the elasticity of the film, and improved the hardness, so as to improve the stain resistance of the coating.
Nucleo-shell emulsion polymerization flexible emulsion. And common core - shell emulsion on the contrary, the elastic core - shell emulsion polymerization, the nuclear for soft monomer, shell as hard monomer, soft core mainly provide flexibility, crust is mainly to improve surface Tg values, improving the contamination resistance of coating. There is also a combination of surface self-crosslinking and nucleo-shell emulsion polymerization to produce elastic lotions.
Silicone modified elastic emulsion. By means of preemulsifying continuous addition and seed polymerization of silicone modified elastic emulsion, it is reported that the former is better than the latter.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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