News Details
Binary amine chain extender
2017-2-20 17:28:28
Binary amine chain extension agent, low molecular weight diamine compounds react with diisocyanate is very fierce, the rapid rate of gel, production is not easy to control, but it can react with isocyanate to generate cohesion high urea base, can gift polyurethane polymer good physical and mechanical properties.
To solve the response speed too fast, the disadvantage of not easy to control, generally used hindered amine compounds, one of the most famous is 3, 3 '- dichloro - 4-2 amino diphenyl methane. Commodity name to the mo card (MOCA).
Moga is conducted by o-chloroaniline and formaldehyde condensation reaction, and the neutralization, alcohol washing, recrystallization steps such as preparation, in MOCA molecules, because in the presence of chlorine atom of the amine of ortho electronic effect and steric hindrance function, thus reduce amino reactivity of appropriate, is able to adapt to the pu gel process.
Mo can gift card and material excellent mechanical properties, so the binary amine chain extender MOCA has been polyurethane, especially is extremely important in the production of polyurethane rubber, coating, and other products of chain extender, MOCA as a white to light yellow acicular crystals, moisture absorption ability, soluble in acetone, tetrahydrofuran, DMF solvents, soluble in ethanol, benzene, toluene.
But the diamine extender chain agent in 1973, the American people for its suspected carcinogen, although after decades of system with a negative conclusion toxicity study, but many countries for the use of binary amine chain extension agent MOCA remains cautious.
In 1969 developed type instead of MOCA non-toxic diamine chain extension agent, the scientific name for 3, 5-2-4 - ammonia chlorobenzoic acid isobutyl alcohol ester, name of commodity is Baytec - 1604. The chain extender slightly lower melting point and reactivity, easy machining operations, and can give excellent physical and mechanical properties of polyurethane rubber.
But the deficiency of the chain extender is it brown after melting, applies only to the preparation of brunet high-performance PUR products. DytekA diamine products especially suitable for the field of polyurethane chain extender, elastic have greatly improved, and who will take care of the products you might as well try.
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
Chain extender is to increase the length of the chain, in essence is to increase the molecular weight of polymer and short chain molecules into long chain molecules. Molecular weight increases, its mechanical properties, heat resistance, wear resistance, all can improve.
Polyester and nylon polymer is an important industrial polymer products, they have end carboxyl. Therefore, two oxazoline extender chain are available, and to further improve the relative molecular mass and viscosity, and improve the processing performance. Loontjens etc., for example, in 1, 32 double base 2 oxazoline (22) of polyethylene terephthalate (PET), nylon 26 extender chain, study the reaction mechanism, found that is reversible reaction to a certain extent; If 1, 32 phenyl 2 pairs of oxazoline (22) and apply to the hydroxy and amino chain extender to use at the same time, the effect is better.
At home, someone use 1, 32 phenyl 2 double oxazoline (22) and double (22 oxazoline) of PET chain extender viscous, and combination with phthalic anhydride, effect is good. Using 2 oxazoline extender chain viscosity of nylon 211 can make the characteristic viscosity increased significantly, melt index declined, the carboxyl content is lower, the amino content is constant, the normal temperature gap has been improved, the impact strength of resin can meet the requirements of extrusion grade after the chain extender, the process is easy to be applied in the production. Use double (22 oxazoline) on poly (butyl glycol terephthalate (PBT) successful extender chain viscosify, have been reported recently.
Polyester, nylon and other polymer blend tend to compatibility problems. Japanese scholars use 1 and 2 pairs (22 oxazoline) phenyl of liquid crystal polyester chain extender and PET blend system), through its carboxyl reaction to improve blending interface connection.
Domestic double (22 oxazoline) as chain extender, further study of PET/liquid crystal copolyester long-chain polymers (LCP) reactive blending, and PET/PEN (polyethylene naphthalate formic acid ethyl ester) of the blending extender chain reaction. Some people try to use 1 and 2 pairs (22 oxazoline) phenyl reactive blending was studied for the PET/PBT. Recently also has double oxazoline compound capacity of PET/PA66 blend system.
On the oxide is suitable for the end of carboxyl polymer chain extender. Use two glycidyl ether ring on oxide, under the condition of reactive blending, Haralabakopoulos extender chain was studied for the PET. Bikiaris etc using glycidyl ester of two compounds containing imide ring of PET and PBT extender chain. The typical reaction conditions as in argon atmosphere, higher than the melting point of chain extender temperature (280 ℃) for a few minutes. Due to this kind of new chain extender has good thermal stability, extender chain effect is very good
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
To solve the response speed too fast, the disadvantage of not easy to control, generally used hindered amine compounds, one of the most famous is 3, 3 '- dichloro - 4-2 amino diphenyl methane. Commodity name to the mo card (MOCA).
Moga is conducted by o-chloroaniline and formaldehyde condensation reaction, and the neutralization, alcohol washing, recrystallization steps such as preparation, in MOCA molecules, because in the presence of chlorine atom of the amine of ortho electronic effect and steric hindrance function, thus reduce amino reactivity of appropriate, is able to adapt to the pu gel process.
Mo can gift card and material excellent mechanical properties, so the binary amine chain extender MOCA has been polyurethane, especially is extremely important in the production of polyurethane rubber, coating, and other products of chain extender, MOCA as a white to light yellow acicular crystals, moisture absorption ability, soluble in acetone, tetrahydrofuran, DMF solvents, soluble in ethanol, benzene, toluene.
But the diamine extender chain agent in 1973, the American people for its suspected carcinogen, although after decades of system with a negative conclusion toxicity study, but many countries for the use of binary amine chain extension agent MOCA remains cautious.
In 1969 developed type instead of MOCA non-toxic diamine chain extension agent, the scientific name for 3, 5-2-4 - ammonia chlorobenzoic acid isobutyl alcohol ester, name of commodity is Baytec - 1604. The chain extender slightly lower melting point and reactivity, easy machining operations, and can give excellent physical and mechanical properties of polyurethane rubber.
But the deficiency of the chain extender is it brown after melting, applies only to the preparation of brunet high-performance PUR products. DytekA diamine products especially suitable for the field of polyurethane chain extender, elastic have greatly improved, and who will take care of the products you might as well try.
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
Chain extender is to increase the length of the chain, in essence is to increase the molecular weight of polymer and short chain molecules into long chain molecules. Molecular weight increases, its mechanical properties, heat resistance, wear resistance, all can improve.
Polyester and nylon polymer is an important industrial polymer products, they have end carboxyl. Therefore, two oxazoline extender chain are available, and to further improve the relative molecular mass and viscosity, and improve the processing performance. Loontjens etc., for example, in 1, 32 double base 2 oxazoline (22) of polyethylene terephthalate (PET), nylon 26 extender chain, study the reaction mechanism, found that is reversible reaction to a certain extent; If 1, 32 phenyl 2 pairs of oxazoline (22) and apply to the hydroxy and amino chain extender to use at the same time, the effect is better.
At home, someone use 1, 32 phenyl 2 double oxazoline (22) and double (22 oxazoline) of PET chain extender viscous, and combination with phthalic anhydride, effect is good. Using 2 oxazoline extender chain viscosity of nylon 211 can make the characteristic viscosity increased significantly, melt index declined, the carboxyl content is lower, the amino content is constant, the normal temperature gap has been improved, the impact strength of resin can meet the requirements of extrusion grade after the chain extender, the process is easy to be applied in the production. Use double (22 oxazoline) on poly (butyl glycol terephthalate (PBT) successful extender chain viscosify, have been reported recently.
Polyester, nylon and other polymer blend tend to compatibility problems. Japanese scholars use 1 and 2 pairs (22 oxazoline) phenyl of liquid crystal polyester chain extender and PET blend system), through its carboxyl reaction to improve blending interface connection.
Domestic double (22 oxazoline) as chain extender, further study of PET/liquid crystal copolyester long-chain polymers (LCP) reactive blending, and PET/PEN (polyethylene naphthalate formic acid ethyl ester) of the blending extender chain reaction. Some people try to use 1 and 2 pairs (22 oxazoline) phenyl reactive blending was studied for the PET/PBT. Recently also has double oxazoline compound capacity of PET/PA66 blend system.
On the oxide is suitable for the end of carboxyl polymer chain extender. Use two glycidyl ether ring on oxide, under the condition of reactive blending, Haralabakopoulos extender chain was studied for the PET. Bikiaris etc using glycidyl ester of two compounds containing imide ring of PET and PBT extender chain. The typical reaction conditions as in argon atmosphere, higher than the melting point of chain extender temperature (280 ℃) for a few minutes. Due to this kind of new chain extender has good thermal stability, extender chain effect is very good
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian