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What is the effect of coating crosslinking agent
2017-5-16 17:09:54
What is the effect of coating crosslinking agent
Crosslinking is a compound that has more than two reactive groups. At high temperature, extremely easy to glue on the hydroxyl and amine, amide, carboxylic, vinyl groups such as crosslinking, also with cellulose cross-linked, form a mesh structure, can improve the fastness of adhesive.
TAIC USES is very wide, it is mainly used for a variety of special rubber vulcanizing agent, thermoplastics, ion exchange value, light curing adhesive crosslinking agent and modifying agent and flame retardants and photosensitive resist intermediate.
TIAC product is not flammable, explosive, endangering the environment, according to the transport of dangerous goods storage, TAIC chemical performance is stable, can be a long time to store in a cool, dark conditions.
Tetraisocyanate
Tetraisocyanate is the original 7900, chemical name 2, 2 '-dimethyl triphenyl methane, 3, 3', 5, 5 '4 isocyanates, the structure of the molecular weight 436. The adhesive film is soft and sticky after the crosslinking, and has certain acid resistance, water resistance, heat resistance, alkali resistance and aging resistance.
As a crosslinking agent for chloroprene adhesive and polyurethane adhesive, reference dosage is 8 ~ 12phr. It can also be used directly as a adhesives, glued to rubber and metal.
Crosslinking agent which is also called room temperature vulcanizing agent or bridging agent, can improve the strength and heat resistance of neoprene, the most commonly used is listed knut JQ - 1 glue, dosage of 5% of the total solid content? 15%. The jq-4 or 7900 are available for light-colored adhesion.
The features of 7900 are solid powder, non-toxic, odorless, light and light, easy to use, easy to carry and strong. The optimum dosage is 2.5% ~ 3% (quality), which is better than jq-1 and jq-4. The crosslinking agent can be conformed by adding 2 ~ 3h to chloroprene, so it can be made into bicomponent glue, which is mixed immediately before use.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
External emulsification method was used with sealed end after the polyurethane slowly add emulsifier to contain water, stir to form coarse emulsion, again into the high shear emulsifying machine emulsified to form stable emulsion. Based on the selection of the emulsion, the emulsifier aeo-9 and oep-982 were selected by the selection of emulsification and the optimum stability of the emulsion was based on the ratio of 3/2.
As the quality of the emulsion was increased, the viscosity gradually increased, and the average size of the emulsion was smaller. The less this is because: when the dosage of emulsifier, only part of the products covered by emulsifying jing molecular sealing end, latex particles is used ShengJu knot, generated by small latex particles more bulky latex particles, serious condensation happens stratification; With the increase of the quality fraction of the emulsifier, the electrostatic repulsion between the emulsion is strengthened, the hydration layer is thickened and the polymerization stability increases.
At the same time, because of the increase of the quantity of emulsifiers, the number of latex particles increased, the average particle size was smaller, the size distribution narrowed, and the emulsion viscosity increased. Dosage is overmuch, redundant emulsifier molecule only stay in the water phase, not for the dispersed phase particles of emulsion and emulsion, influence the stability of the emulsion, it will also reduce the resistance to water of emulsion application, and the bubble too much, will affect production. As a result, the emulsifier AEO_9 / oep-982 is 3/2, and the emulsifier quality fraction is 4% of the prepolymer dose.
Infrared spectrum of the r a pair) and differential scanning (DSC) analysis. Using infrared spectroscopy (FT. IR) and differential scanning (DSC) analysis of sealing and type of waterborne polyurethane emulsion, to characterize the molecular structure of the synthesized product.
1700cm is the retractable vibration peak of C 1 0 in the CO -nh, and 1500cm of the deformation vibrational peak of NH in the CO - NH, and the occurrence of these two oscillations indicates the formation of carbamate in the reaction products. The extendable vibration-peak of o-c-o, at 1100cm, has two vibrating peaks at 1224.8 cm and 1109.9 cm, indicating that the synthetic product is polyether polyurethane.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Crosslinking is a compound that has more than two reactive groups. At high temperature, extremely easy to glue on the hydroxyl and amine, amide, carboxylic, vinyl groups such as crosslinking, also with cellulose cross-linked, form a mesh structure, can improve the fastness of adhesive.
TAIC USES is very wide, it is mainly used for a variety of special rubber vulcanizing agent, thermoplastics, ion exchange value, light curing adhesive crosslinking agent and modifying agent and flame retardants and photosensitive resist intermediate.
TIAC product is not flammable, explosive, endangering the environment, according to the transport of dangerous goods storage, TAIC chemical performance is stable, can be a long time to store in a cool, dark conditions.
Tetraisocyanate
Tetraisocyanate is the original 7900, chemical name 2, 2 '-dimethyl triphenyl methane, 3, 3', 5, 5 '4 isocyanates, the structure of the molecular weight 436. The adhesive film is soft and sticky after the crosslinking, and has certain acid resistance, water resistance, heat resistance, alkali resistance and aging resistance.
As a crosslinking agent for chloroprene adhesive and polyurethane adhesive, reference dosage is 8 ~ 12phr. It can also be used directly as a adhesives, glued to rubber and metal.
Crosslinking agent which is also called room temperature vulcanizing agent or bridging agent, can improve the strength and heat resistance of neoprene, the most commonly used is listed knut JQ - 1 glue, dosage of 5% of the total solid content? 15%. The jq-4 or 7900 are available for light-colored adhesion.
The features of 7900 are solid powder, non-toxic, odorless, light and light, easy to use, easy to carry and strong. The optimum dosage is 2.5% ~ 3% (quality), which is better than jq-1 and jq-4. The crosslinking agent can be conformed by adding 2 ~ 3h to chloroprene, so it can be made into bicomponent glue, which is mixed immediately before use.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
External emulsification method was used with sealed end after the polyurethane slowly add emulsifier to contain water, stir to form coarse emulsion, again into the high shear emulsifying machine emulsified to form stable emulsion. Based on the selection of the emulsion, the emulsifier aeo-9 and oep-982 were selected by the selection of emulsification and the optimum stability of the emulsion was based on the ratio of 3/2.
As the quality of the emulsion was increased, the viscosity gradually increased, and the average size of the emulsion was smaller. The less this is because: when the dosage of emulsifier, only part of the products covered by emulsifying jing molecular sealing end, latex particles is used ShengJu knot, generated by small latex particles more bulky latex particles, serious condensation happens stratification; With the increase of the quality fraction of the emulsifier, the electrostatic repulsion between the emulsion is strengthened, the hydration layer is thickened and the polymerization stability increases.
At the same time, because of the increase of the quantity of emulsifiers, the number of latex particles increased, the average particle size was smaller, the size distribution narrowed, and the emulsion viscosity increased. Dosage is overmuch, redundant emulsifier molecule only stay in the water phase, not for the dispersed phase particles of emulsion and emulsion, influence the stability of the emulsion, it will also reduce the resistance to water of emulsion application, and the bubble too much, will affect production. As a result, the emulsifier AEO_9 / oep-982 is 3/2, and the emulsifier quality fraction is 4% of the prepolymer dose.
Infrared spectrum of the r a pair) and differential scanning (DSC) analysis. Using infrared spectroscopy (FT. IR) and differential scanning (DSC) analysis of sealing and type of waterborne polyurethane emulsion, to characterize the molecular structure of the synthesized product.
1700cm is the retractable vibration peak of C 1 0 in the CO -nh, and 1500cm of the deformation vibrational peak of NH in the CO - NH, and the occurrence of these two oscillations indicates the formation of carbamate in the reaction products. The extendable vibration-peak of o-c-o, at 1100cm, has two vibrating peaks at 1224.8 cm and 1109.9 cm, indicating that the synthetic product is polyether polyurethane.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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