News Details
Water-based coatings for resin crosslinking agent
2017-6-19 23:05:36
Water-based coatings for resin crosslinking agent
Polyurethane is a high molecular compound that contains a lot of carbamate in the main chain. It is produced by the gradual polymerization of two (or more) isocyanates and two (or more) meta-alcohol. Polyurethane is one of the most comprehensive synthetic resins. Due to the large variety of synthetic monomer and the wide variety of formula, it can be widely used in coatings, adhesives, foamed plastics and elastomer.
The research of waterborne polyurethane beginning since the 50 s, 60 s and 70 s, the rapid development of the research and development of waterborne polyurethane, began in the 70 s industrialized production of water-borne polyurethane used as leather finishing agent.
Into the 90 s, along with the people environmental protection consciousness and the strengthening of environmental regulations, environment friendly waterborne polyurethane in the research, development is becoming more and more attention, its application has expanded by leather finishing agent to paint, glue, and other fields, is one by one step of solvent-based polyurethane markets, represents the development direction of coating, adhesive.
The two-component water-based polyurethane system is composed of a dispersive (or emulsion) of polyisocyanate and hydroxy functional groups that are dispersed by water. In this formula, the isocyanate more easily dispersed in water, but it is not soluble in water, but by the polyols oligomer BaoRong dispersion particles, after being moisture volatilizes, crosslinking and film.
The viscosity should be low and has certain surface activity. The hydroxyl group's reaction to the polyisocyanates was also much faster than the response to water. Therefore, for a two-component water system, the hydroxyl group is prefered with isocyanate in normal water volatilization.
A single component of water-based polyurethane coating has only one component, and its molecular skeleton can be linear or branch. It can also be thermoplastic or spontaneous, photoinduced, heat-induced crosslinked. Its characteristic is convenient for construction, there is no storage gel, but film performance, such as hardness, wear resistance, chemical resistance character than two-component waterborne polyurethane.
The present single component water-based polyurethane coating resin is a modified water-based polyurethane. There are many methods of modification: such as acrylic grafting, epoxy resin and dry oil modification.
Over the years, there has been extensive research on the synthesis of water-based resins:
(1) the theory method of the molecular weight control of condensation polymerization is established;
(2) composition of water-based polyurethane leather coating agent;
(3) the synthesis of a single component wood paint water acrylic and polyurethane molecular hybridization;
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.
(4) the composition of single component wood lacquer with water-based polyurethane resin and water-based polyurethane oil;
(5) the synthesis of water-based polyurethane resin (hydroxyl) resin in double single component wood.
(6) industrial baking paints by water polyester and alkyd resin; In addition, the synthesis of water-dispersible isocyanates was also preliminarily explored.
Properties of nuclear - shell type water-based polyurethane resin hybridization. Solid content: 32%; Hardness: > 1 h; Sheen: > 85; Water resistance: 24h no change; Impact: 50 kg. Adhesion: 1-2. In addition, the system is easy to upgrade, high-grade no yellowing of the product, can be developed for PS, ABS, PVC, glass and aluminum was also has very good adhesion, extremely widespread application development potential.
Single component water-based coating with water-based polyurethane and water-based ammonia oil dispersive technology index. Solid content: 35%; Hardness: > 2 h; Sheen: > 85; Water resistance: 24h no change; Impact: 50 kg. Adhesion: 1-2.
Two-component water-based polyurethane coating with water-based polyurethane dispersion technology index. Appearance: blue and white liquid; Solid content: 35%; Viscosity: 20-100mpa. S; H: 100mgKOH/g (resin); PH: 6.5 to 7.5.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Polyurethane is a high molecular compound that contains a lot of carbamate in the main chain. It is produced by the gradual polymerization of two (or more) isocyanates and two (or more) meta-alcohol. Polyurethane is one of the most comprehensive synthetic resins. Due to the large variety of synthetic monomer and the wide variety of formula, it can be widely used in coatings, adhesives, foamed plastics and elastomer.
The research of waterborne polyurethane beginning since the 50 s, 60 s and 70 s, the rapid development of the research and development of waterborne polyurethane, began in the 70 s industrialized production of water-borne polyurethane used as leather finishing agent.
Into the 90 s, along with the people environmental protection consciousness and the strengthening of environmental regulations, environment friendly waterborne polyurethane in the research, development is becoming more and more attention, its application has expanded by leather finishing agent to paint, glue, and other fields, is one by one step of solvent-based polyurethane markets, represents the development direction of coating, adhesive.
The two-component water-based polyurethane system is composed of a dispersive (or emulsion) of polyisocyanate and hydroxy functional groups that are dispersed by water. In this formula, the isocyanate more easily dispersed in water, but it is not soluble in water, but by the polyols oligomer BaoRong dispersion particles, after being moisture volatilizes, crosslinking and film.
The viscosity should be low and has certain surface activity. The hydroxyl group's reaction to the polyisocyanates was also much faster than the response to water. Therefore, for a two-component water system, the hydroxyl group is prefered with isocyanate in normal water volatilization.
A single component of water-based polyurethane coating has only one component, and its molecular skeleton can be linear or branch. It can also be thermoplastic or spontaneous, photoinduced, heat-induced crosslinked. Its characteristic is convenient for construction, there is no storage gel, but film performance, such as hardness, wear resistance, chemical resistance character than two-component waterborne polyurethane.
The present single component water-based polyurethane coating resin is a modified water-based polyurethane. There are many methods of modification: such as acrylic grafting, epoxy resin and dry oil modification.
Over the years, there has been extensive research on the synthesis of water-based resins:
(1) the theory method of the molecular weight control of condensation polymerization is established;
(2) composition of water-based polyurethane leather coating agent;
(3) the synthesis of a single component wood paint water acrylic and polyurethane molecular hybridization;
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.
(4) the composition of single component wood lacquer with water-based polyurethane resin and water-based polyurethane oil;
(5) the synthesis of water-based polyurethane resin (hydroxyl) resin in double single component wood.
(6) industrial baking paints by water polyester and alkyd resin; In addition, the synthesis of water-dispersible isocyanates was also preliminarily explored.
Properties of nuclear - shell type water-based polyurethane resin hybridization. Solid content: 32%; Hardness: > 1 h; Sheen: > 85; Water resistance: 24h no change; Impact: 50 kg. Adhesion: 1-2. In addition, the system is easy to upgrade, high-grade no yellowing of the product, can be developed for PS, ABS, PVC, glass and aluminum was also has very good adhesion, extremely widespread application development potential.
Single component water-based coating with water-based polyurethane and water-based ammonia oil dispersive technology index. Solid content: 35%; Hardness: > 2 h; Sheen: > 85; Water resistance: 24h no change; Impact: 50 kg. Adhesion: 1-2.
Two-component water-based polyurethane coating with water-based polyurethane dispersion technology index. Appearance: blue and white liquid; Solid content: 35%; Viscosity: 20-100mpa. S; H: 100mgKOH/g (resin); PH: 6.5 to 7.5.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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