News Details
Coating with silane crosslinking agent
2017-4-6 11:16:32
Coating with silane crosslinking agent,Silane adhesion promoter and crosslinking agent is widely used in coating industry. The advantages of silane in coating system in the early half a century ago has known to the public.
As formula of additives or organic silane products in the process of polymerization of monomers can be showed good effect on the paint film. Coating containing silane its abrasion resistance, water resistance, solvent resistance, acid-proof alkaline, and for a variety of substrate adhesion have been improved obviously. With silane treated beforehand pigment dispersion and adhesive properties, lower viscosity, covering power is stronger. As a result, several aspects of the silane in coating industry gradually become an indispensable important part.
Using ISO 579 revision method for gel content determination. Common step is before the start of the test, first the silane mix with pure resin emulsion adhesive for at least 24 hours. Add resin emulsion into the teflon beaker, curing under 80 ℃ for 24 hours. Remove resin after curing, within the cable type extractor with methyl ethyl ketone extraction for 8 hours. Extraction of curing resin weight difference before and after is the content of the gel.
Hydrogen evolution experiment in 50 ml brown glass container according to the following formula, and the experiment to use 50 g of zinc slurry. Glass containers in the temperature of 40 ℃ the thermal cycle of slot. And then seal the container with the rubber plug, the container with polyethylene pipe connected to the pipette of water. Two weeks after the measurement of gas flow. Table 1-3 in the sample preparation process, for example, summarized the experimental formula was introduced.
In general, organic functional silane contains a functional group (Y, see figure 1), the organic functional groups through organic key (R) connected to one or more silicon atoms. Each of the silicon atoms with 1, 2 OR 3 can be hydrolyzed alkoxy (OR '). Organic linkers (Y) can react with functional groups on the polymer backbone. Can be hydrolyzed groups can react with water (OR), formation of reactive silanol groups (SiOH) link on the packing OR base material, after OR self condensation forming siloxane (SiOSi).
Silane alkoxy substituents on the reactivity of influenced by multiple factors, such as blocking agents, temperature, water content and pH, etc. Documented the reaction of silane and there are a lot of reactive research.
Chinese name: Diethyl toluene diamine(DETDA)
Chinese alias: aryl, aryl diethyl - aryl - methyl-p-phenylenediamine
English name: Benzenediamine, ar, ar-diethyl-ar-methyl-English aliases:Diethyltoluenediamine; ar, ar-Diethyl-ar-methylbenzenediamine;Diethylmethylbenzenediamine;
CAS No. :68479-98-1
EINECS No. :270 -877-4
Molecular formula: C11H18N2
Molecular Weight: 178.28
Boiling point: 310 ℃
Refractive index: 1.581
Flash Point: > 140 ℃
Inchi: InChI = 1/C11H18N2/c1-4-8-6-7 (3) 10 (12) 11 (13) 9 (8) 5-2/h6H ,4-5,12-13H2 ,1-3H3 density : 1.022
Risk Codes: R10; R35
RIDADR: UN 3082
Safety instructions: S2; S26; S39; S61
Packing Group: III
Hazard Class: 6.1
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. The reaction is difficult to identify in the formula, may occur in parallel in the polymer system.
Organic functional silane has a variety of applications in coatings industry.
Silane is a Marine and protective coatings, decorative coatings, industrial coatings and industrial coatings, wood coatings and printing ink of important component. Due to the chemical reactivity Y groups, silane can be used in the oil system, water-based and uv curing 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 on the role of each system is different, but usually there are two major types of crosslinking agent and surface modification agent. 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.
This kind of coating preparation programs usually need a premixed, silane and polymer mixed first, and ensure the silane grafted to the polymer backbone. After a certain after the induction period of the modified polymer mixed with other ingredients.
Needs to improve the adhesion of metal or glass substrate, silane is more as an adhesion promoter, are attached to the substrate surface through the silanol condensation reaction.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
As formula of additives or organic silane products in the process of polymerization of monomers can be showed good effect on the paint film. Coating containing silane its abrasion resistance, water resistance, solvent resistance, acid-proof alkaline, and for a variety of substrate adhesion have been improved obviously. With silane treated beforehand pigment dispersion and adhesive properties, lower viscosity, covering power is stronger. As a result, several aspects of the silane in coating industry gradually become an indispensable important part.
Using ISO 579 revision method for gel content determination. Common step is before the start of the test, first the silane mix with pure resin emulsion adhesive for at least 24 hours. Add resin emulsion into the teflon beaker, curing under 80 ℃ for 24 hours. Remove resin after curing, within the cable type extractor with methyl ethyl ketone extraction for 8 hours. Extraction of curing resin weight difference before and after is the content of the gel.
Hydrogen evolution experiment in 50 ml brown glass container according to the following formula, and the experiment to use 50 g of zinc slurry. Glass containers in the temperature of 40 ℃ the thermal cycle of slot. And then seal the container with the rubber plug, the container with polyethylene pipe connected to the pipette of water. Two weeks after the measurement of gas flow. Table 1-3 in the sample preparation process, for example, summarized the experimental formula was introduced.
In general, organic functional silane contains a functional group (Y, see figure 1), the organic functional groups through organic key (R) connected to one or more silicon atoms. Each of the silicon atoms with 1, 2 OR 3 can be hydrolyzed alkoxy (OR '). Organic linkers (Y) can react with functional groups on the polymer backbone. Can be hydrolyzed groups can react with water (OR), formation of reactive silanol groups (SiOH) link on the packing OR base material, after OR self condensation forming siloxane (SiOSi).
Silane alkoxy substituents on the reactivity of influenced by multiple factors, such as blocking agents, temperature, water content and pH, etc. Documented the reaction of silane and there are a lot of reactive research.
Chinese name: Diethyl toluene diamine(DETDA)
Chinese alias: aryl, aryl diethyl - aryl - methyl-p-phenylenediamine
English name: Benzenediamine, ar, ar-diethyl-ar-methyl-English aliases:Diethyltoluenediamine; ar, ar-Diethyl-ar-methylbenzenediamine;Diethylmethylbenzenediamine;
CAS No. :68479-98-1
EINECS No. :270 -877-4
Molecular formula: C11H18N2
Molecular Weight: 178.28
Boiling point: 310 ℃
Refractive index: 1.581
Flash Point: > 140 ℃
Inchi: InChI = 1/C11H18N2/c1-4-8-6-7 (3) 10 (12) 11 (13) 9 (8) 5-2/h6H ,4-5,12-13H2 ,1-3H3 density : 1.022
Risk Codes: R10; R35
RIDADR: UN 3082
Safety instructions: S2; S26; S39; S61
Packing Group: III
Hazard Class: 6.1
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. The reaction is difficult to identify in the formula, may occur in parallel in the polymer system.
Organic functional silane has a variety of applications in coatings industry.
Silane is a Marine and protective coatings, decorative coatings, industrial coatings and industrial coatings, wood coatings and printing ink of important component. Due to the chemical reactivity Y groups, silane can be used in the oil system, water-based and uv curing 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 on the role of each system is different, but usually there are two major types of crosslinking agent and surface modification agent. 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.
This kind of coating preparation programs usually need a premixed, silane and polymer mixed first, and ensure the silane grafted to the polymer backbone. After a certain after the induction period of the modified polymer mixed with other ingredients.
Needs to improve the adhesion of metal or glass substrate, silane is more as an adhesion promoter, are attached to the substrate surface through the silanol condensation reaction.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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