News Details
Fatty alcohol chain extender
2017-2-20 17:28:25
Fatty alcohol chain extender, variety is more, there are mainly 1, 4 - butanediol, ethylene glycol, propylene glycol, recoiled diethylene glycol, neopentyl glycol, etc. Ternary alcohol compounds with glycerol, three hydroxyl methyl propyl silane (TMP), etc.
In polyurethane, especially the synthesis of polyurethane foam, the most used is 1, 4 - butanediol. As we all know, basic is polyurethane polymer (A - B) linear structure of x type block copolymer, the soft chain segment composed, polyethylene glycol macromolecular and hard chain segment is made up of diisocyanate and low molecular diol reaction.
1, 4 - butanediol has a moderate carbon - carbon chain length, can make the soft and hard chain segment produces micro zone to separation, carbamate hard chain segment crystalline better, even if have to MDI - 1, 4 butanediol hard chain can be well directed, in this way, the crystallization and orientation arrangement makes it easier to form hydrogen between polymer molecular chain, which means it can produce good orderly crystal, crystal resistance effect and polymer chain segment of migration, finally show the polymer has excellent toughness and hardness.
Is given priority to with fatty alcohol kind of chain extender, the bubble in the products, is mainly used in high elastic resilient soft, semi-hard foam, rigid RIM and microporous elastomer products such as production, they participate in the reaction, not only has the effects of chain extender and crosslinking, adjust the foam structure and opening rate, improve the resilience of the product, the rigid and mechanical properties, at the same time, it also can reduce viscosity of raw material component, improve the intermiscibility raw material components.
Fatty alcohol type chain extension agent in polyurethane elastomer, coating, and other products, especially the MDI PUR products, is a widely used chain extender. In the new development of alcohol chain extender, the abbreviation for HQEE and its ehrs worth two glycol chain extender with aromatic ring. In fatty alcohol type of chain extender, except the compounds of difunctional, also in the process of polyurethane synthetic functions often use three or four faculties base compound.
Commonly used with trimethylolpropane and pentaerythritol, etc. They generate carbamate in reaction with isocyanate groups make molecular chain growth at the same time, also in the molecular chain of generating leads branched chain reaction point, in a further reaction, make polymer molecules to produce a certain degree of crosslinking, form a mesh structure.
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.
In the polyurethane rubber, coating, adhesive, such as production, often with their ordinary glycol or diamine, in order to obtain some improve and enhance the performance of polyurethane products.
Chain extender for low molecular mass containing hydroxy and amino alcohols or more functional groups, amine compounds commonly used alcohol chain extender with 1, 4 yiding diol (BDO), 1, 6 alone glycol, glycerin, trimethylolpropane, diethylene glycol (DEG), triethylene glycol, neopentyl glycol (NPG), sorbitol, diethyl amino ethanol (DEAE), etc. Amine chain extender with MOCA and modified by formaldehyde of liquid MOCA, ethylenediamine (DA), N, N - dihydroxy (diisopropyl aniline (HPA), etc. 12 and hydroquinone (beta hydroxyethyl) ether (HQEE), used as chain extender, polyurethane adhesives its product heat resistance, hardness and elasticity than the generally used chain extender.
At present, the isocyanate extender chain method in poly (lactic acid is widely used in the synthesis of biodegradable polymer materials. Such as the recent TDI synthesis of poly (lactic acid biodegradable polymers as drug slow-release material and fixed material aspects of the report. If the MDI chain extender racemic polylactic acid and hydroxyl apatite compound (PDDLA/HA), can synthesize applied in bone repair of composite materials (PDDLA/HA/MDI), die extrusion molding process after the mechanical properties than without HA enhanced PDDLA/MDI and MDI chain extender PDDLA/HA are all well.
To the production of polyurethane chain extender is necessary reagents, polyurethane is with two different acrylic acid ester base of aliphatic and aromatic monomer containing binary or polyester or polyether polyols reaction to form prepolymer, application to join the chain extender resins forming. Common chain extender is small molecules containing dual or multiple hydroxyl alcohol or ethers.
Many contain N, O atoms such as the heterocyclic compounds can be used in the chain extension reaction, 2 oxazoline in the most common, and it is mainly suitable for end of carboxyl polymer extender chain. Commonly used 2 oxazoline, 32 phenyl 1 2 pairs (22 oxazoline), 1 and 2 double (22 oxazoline) phenyl, double (22 oxazoline), etc., including double (22 oxazoline) in the synthesis of poly (lactic acid biodegradable polymer materials, special attention recently, the effect is very good, heavy all molecular weight (Mw) of 10000 pre polymers through chain extension reaction after 10 min, product Mw up to 390000.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
In polyurethane, especially the synthesis of polyurethane foam, the most used is 1, 4 - butanediol. As we all know, basic is polyurethane polymer (A - B) linear structure of x type block copolymer, the soft chain segment composed, polyethylene glycol macromolecular and hard chain segment is made up of diisocyanate and low molecular diol reaction.
1, 4 - butanediol has a moderate carbon - carbon chain length, can make the soft and hard chain segment produces micro zone to separation, carbamate hard chain segment crystalline better, even if have to MDI - 1, 4 butanediol hard chain can be well directed, in this way, the crystallization and orientation arrangement makes it easier to form hydrogen between polymer molecular chain, which means it can produce good orderly crystal, crystal resistance effect and polymer chain segment of migration, finally show the polymer has excellent toughness and hardness.
Is given priority to with fatty alcohol kind of chain extender, the bubble in the products, is mainly used in high elastic resilient soft, semi-hard foam, rigid RIM and microporous elastomer products such as production, they participate in the reaction, not only has the effects of chain extender and crosslinking, adjust the foam structure and opening rate, improve the resilience of the product, the rigid and mechanical properties, at the same time, it also can reduce viscosity of raw material component, improve the intermiscibility raw material components.
Fatty alcohol type chain extension agent in polyurethane elastomer, coating, and other products, especially the MDI PUR products, is a widely used chain extender. In the new development of alcohol chain extender, the abbreviation for HQEE and its ehrs worth two glycol chain extender with aromatic ring. In fatty alcohol type of chain extender, except the compounds of difunctional, also in the process of polyurethane synthetic functions often use three or four faculties base compound.
Commonly used with trimethylolpropane and pentaerythritol, etc. They generate carbamate in reaction with isocyanate groups make molecular chain growth at the same time, also in the molecular chain of generating leads branched chain reaction point, in a further reaction, make polymer molecules to produce a certain degree of crosslinking, form a mesh structure.
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.
In the polyurethane rubber, coating, adhesive, such as production, often with their ordinary glycol or diamine, in order to obtain some improve and enhance the performance of polyurethane products.
Chain extender for low molecular mass containing hydroxy and amino alcohols or more functional groups, amine compounds commonly used alcohol chain extender with 1, 4 yiding diol (BDO), 1, 6 alone glycol, glycerin, trimethylolpropane, diethylene glycol (DEG), triethylene glycol, neopentyl glycol (NPG), sorbitol, diethyl amino ethanol (DEAE), etc. Amine chain extender with MOCA and modified by formaldehyde of liquid MOCA, ethylenediamine (DA), N, N - dihydroxy (diisopropyl aniline (HPA), etc. 12 and hydroquinone (beta hydroxyethyl) ether (HQEE), used as chain extender, polyurethane adhesives its product heat resistance, hardness and elasticity than the generally used chain extender.
At present, the isocyanate extender chain method in poly (lactic acid is widely used in the synthesis of biodegradable polymer materials. Such as the recent TDI synthesis of poly (lactic acid biodegradable polymers as drug slow-release material and fixed material aspects of the report. If the MDI chain extender racemic polylactic acid and hydroxyl apatite compound (PDDLA/HA), can synthesize applied in bone repair of composite materials (PDDLA/HA/MDI), die extrusion molding process after the mechanical properties than without HA enhanced PDDLA/MDI and MDI chain extender PDDLA/HA are all well.
To the production of polyurethane chain extender is necessary reagents, polyurethane is with two different acrylic acid ester base of aliphatic and aromatic monomer containing binary or polyester or polyether polyols reaction to form prepolymer, application to join the chain extender resins forming. Common chain extender is small molecules containing dual or multiple hydroxyl alcohol or ethers.
Many contain N, O atoms such as the heterocyclic compounds can be used in the chain extension reaction, 2 oxazoline in the most common, and it is mainly suitable for end of carboxyl polymer extender chain. Commonly used 2 oxazoline, 32 phenyl 1 2 pairs (22 oxazoline), 1 and 2 double (22 oxazoline) phenyl, double (22 oxazoline), etc., including double (22 oxazoline) in the synthesis of poly (lactic acid biodegradable polymer materials, special attention recently, the effect is very good, heavy all molecular weight (Mw) of 10000 pre polymers through chain extension reaction after 10 min, product Mw up to 390000.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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