News Details
Silane paint crosslinking agent
2017-6-6 17:34:15
Silane paint crosslinking agent
Silane is widely used in coating industry as adhesion accelerator and crosslinking agent.
The advantage of silane in the coating system is known to the public as early as half a century ago. The silane product as the additive in the recipe or the monomer in the organic polymerization process can show good effect on the paint film.
The coating that contains silane is wear-resistant, water resistant, solvent, acid alkali and adhesion to many kinds of base material have obvious improvement. The dispersibility and adhesion of the pigments predisposed by silane are enhanced, the viscosity is lower, and the masking forces are stronger. As a result, silane has become an integral part of the coating industry.
Perform the cornig hardness test at ISO 1522-1973. Use the DIN 68861-1b for an anti-fouling test.
Gel determination. Use the ISO 579 revision method to measure the gel content. The usual procedure is to mix the silane with a pure resin emulsion for at least 24 hours before the test begins. Add resin emulsion into the teflon beaker, curing under 80 ℃ for 24 hours. After curing, the resin is extracted and extracted in the sole-type extractor for 8 hours. The difference in weight of the solidified resin before and after the extraction is the amount of the gel.
The experiment was carried out in 50mL brown glass containers, with 50g of zinc. Glass containers in the temperature of 40 ℃ the thermal cycle of slot. The container is then sealed with a rubber plug and a polyethylene tube is used to connect the container to the suction tube full of water. The amount of gas measured in two weeks.
In general, the organic functional group silane consists of an organic functional group, which is connected to one or more silicon atoms through the organic bond (R). Each silicon atom has one, two, OR three hydrolyzed aloxy (OR '). The organic group (Y) can react with the functional group on the polymer skeleton. The hydrolyzed group (OR) can react with water to form a reactive silicone group (SiOH) to be attached to the filler OR substrate, OR self-condensation to form SiOSi.
The reactivity of the alkyloxy substituents on silane is influenced by several factors, such as resistance, temperature, moisture content and pH. There has been a lot of research on the reaction and reactivity of silane in the literature.
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.
Alkoxy hydrolysis occurs, the hydrolysate of three silanol (a) strong reactivity, participate in the two main reactions: silanol condensation reaction between (siloxane crosslinking) and silanol - base material coupling reaction. These reactions are difficult to identify in the formulation, and may occur in parallel in the polymer system.
Organic functional group silane has many applications in the coating industry. Silane is an important component of ships and protective coatings, decorative coatings, industrial coatings and industrial paints, wood coatings and printing ink.
Because of the chemical reactivity of the Y group, silane can be applied to the oil system, uv solidification and water system. Usually silane can significantly improve the water resistance, chemical resistance, dry wet adhesion on the surface of the metal, metal surface corrosion resistance, glass or polyolefin substrate adhesion and coating durability.
Silane plays a different role in each system, but it is generally divided into two types: crosslinking agents and surface modifiers. In needs to improve the water resistance, chemical resistance and durability of the system, the role of silane in coating is achieved by silanol condensation reaction between the crosslinking density of the larger. The preparation of such coatings usually requires a pre-mixing procedure to mix the silane and the polymer first, making sure that silane is fully grafted onto the polymer skeleton. After a certain induction period, the modified polymer was mixed with other components.
When the adhesion of metal or glass substrate is needed, the silane is more as a adhesion promoter and adhered to the substrate surface by condensation of silicone.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Silane is widely used in coating industry as adhesion accelerator and crosslinking agent.
The advantage of silane in the coating system is known to the public as early as half a century ago. The silane product as the additive in the recipe or the monomer in the organic polymerization process can show good effect on the paint film.
The coating that contains silane is wear-resistant, water resistant, solvent, acid alkali and adhesion to many kinds of base material have obvious improvement. The dispersibility and adhesion of the pigments predisposed by silane are enhanced, the viscosity is lower, and the masking forces are stronger. As a result, silane has become an integral part of the coating industry.
Perform the cornig hardness test at ISO 1522-1973. Use the DIN 68861-1b for an anti-fouling test.
Gel determination. Use the ISO 579 revision method to measure the gel content. The usual procedure is to mix the silane with a pure resin emulsion for at least 24 hours before the test begins. Add resin emulsion into the teflon beaker, curing under 80 ℃ for 24 hours. After curing, the resin is extracted and extracted in the sole-type extractor for 8 hours. The difference in weight of the solidified resin before and after the extraction is the amount of the gel.
The experiment was carried out in 50mL brown glass containers, with 50g of zinc. Glass containers in the temperature of 40 ℃ the thermal cycle of slot. The container is then sealed with a rubber plug and a polyethylene tube is used to connect the container to the suction tube full of water. The amount of gas measured in two weeks.
In general, the organic functional group silane consists of an organic functional group, which is connected to one or more silicon atoms through the organic bond (R). Each silicon atom has one, two, OR three hydrolyzed aloxy (OR '). The organic group (Y) can react with the functional group on the polymer skeleton. The hydrolyzed group (OR) can react with water to form a reactive silicone group (SiOH) to be attached to the filler OR substrate, OR self-condensation to form SiOSi.
The reactivity of the alkyloxy substituents on silane is influenced by several factors, such as resistance, temperature, moisture content and pH. There has been a lot of research on the reaction and reactivity of silane in the literature.
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.
Alkoxy hydrolysis occurs, the hydrolysate of three silanol (a) strong reactivity, participate in the two main reactions: silanol condensation reaction between (siloxane crosslinking) and silanol - base material coupling reaction. These reactions are difficult to identify in the formulation, and may occur in parallel in the polymer system.
Organic functional group silane has many applications in the coating industry. Silane is an important component of ships and protective coatings, decorative coatings, industrial coatings and industrial paints, wood coatings and printing ink.
Because of the chemical reactivity of the Y group, silane can be applied to the oil system, uv solidification and water system. Usually silane can significantly improve the water resistance, chemical resistance, dry wet adhesion on the surface of the metal, metal surface corrosion resistance, glass or polyolefin substrate adhesion and coating durability.
Silane plays a different role in each system, but it is generally divided into two types: crosslinking agents and surface modifiers. In needs to improve the water resistance, chemical resistance and durability of the system, the role of silane in coating is achieved by silanol condensation reaction between the crosslinking density of the larger. The preparation of such coatings usually requires a pre-mixing procedure to mix the silane and the polymer first, making sure that silane is fully grafted onto the polymer skeleton. After a certain induction period, the modified polymer was mixed with other components.
When the adhesion of metal or glass substrate is needed, the silane is more as a adhesion promoter and adhered to the substrate surface by condensation of silicone.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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