News Details
Environmental protection powder coating crosslinking agent
2017-4-8 11:48:04
Environmental protection powder coating crosslinking agent, caprolactam closed isocyanate crosslinking agent such as fatty acid, urea, price comparison Primid (hydroxyl alkyl amide) or a large gap.
General industrial use of powder and the use of these expensive crosslinking agent, the price can't be accepted by the market, can only be hydroxyl alkyl amide fluctuation kongfu.
Hydroxyl alkyl amide crosslinking agent appearance is white crystalline powder, easily dissolved in water and alcohol, the melting point of 110 ~ 125 ℃, the hydroxyl equivalent of 76-86 g/eq. Were used for liquid hydroxyl resin crosslinking agent.
Primid QM1260, melting point 100 ℃, the hydroxyl equivalent of 100 g/ep. A beta - hydroxypropyl derivatives, its main purpose is to improve XL552 yellowing problem, resistance to gas baking and hydrolysis resistance performance. Its low functionality improvement product Primid SF4510, melting point 100 ℃, the hydroxyl equivalent of 100 g/eq. Improvement in terms of thickness of coating.
In addition, PT910 and 912 low molecular weight epoxy compound, in Europe have passed EINECS (European Inventory of Existing ltd. Chemical Substances). PT910 melting point is 90 ~ 102 ℃, epoxy equivalent of 141 ~ 154 g/eq. PT912 than PT910 has higher reactivity and crosslinking density and melting point is 82 ~ 96 ℃, epoxy equivalent of 141 ~ 154 g/eq.
TGIC activity is poorer, when the design of coating formula, we can consider to choose active match the larger polyester. And active hydroxyl alkyl amide itself is larger, and still need to discharge reaction generated when the moisture. If use the polyester neither reaction too fast to molten coating sufficient flow leveling time, also did not give response produced by the steam flow sufficient discharge time, so that a coating surface defects such as dim is not clear and the pinhole. So, hydroxyl alkyl amide should choose active poor polyester to cooperate.
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.
As a result of TGIC and hydroxyl alkyl amide contrary to the requirement of polyester. Circulate on the market of TGIC and hydroxyl alkyl amide and carboxyl polyester, is take the activity of compromise. So, to attend, not worth accumulates promotion.
As hydroxyl alkyl amide resin for special purpose, should choose low reactivity, low melt viscosity, low glass transition temperature of polyester. Of course, the acid value are relatively low. When choosing polyester, usually through the determination of softening point of the resin and acid value, powder, powder of the gel time of molten liquid to evaluate the applicability of the polyester. So, the design formula will consider multiple spell with polyester, in order to achieve the expected goals.
In addition, TGIC has a single nitrogen atoms in the molecule, due to closed the triazine ring structure, and make it difficult to oxidation stability. Hydroxyl alkyl amide molecule contains two bare nitrogen atoms, lose it is susceptible to oxidation stability, resulting in the yellowing. In the design of formula, choose polyester low acid value, in order to reduce the amount of hydroxyl alkyl amide, or add antioxidant method such as shielding its nitrogen atoms in the molecule, prevent oxidation to enhance stability of it, against the yellowing have certain effect.
Second, TGIC is oil soluble, has good compatibility with carboxyl polyester. And hydroxyl alkyl amide is water soluble, and carboxyl polyester completely incompatible, only scattered in the carboxyl polyester. When processing, should pay attention to the full dispersion in the mixer, select mixing extruder melt extrusion with good effect. Or hydroxyl alkyl amide prepressing dispersed masterbatch to use.
Different coating due to the resin is different, also different to the requirement of the same kind of solvent. BTX aromatics S - 100 main role in the nitro wood coatings for volatile speed regulation, wide range and low initial boiling point can not work very well; BTX aromatics S - 100 in Marine coatings and anticorrosive coatings is not require its volatilizing speed regulation, main effect is cost reduction and regulation construction viscosity, wide distillation range appropriate for use.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
General industrial use of powder and the use of these expensive crosslinking agent, the price can't be accepted by the market, can only be hydroxyl alkyl amide fluctuation kongfu.
Hydroxyl alkyl amide crosslinking agent appearance is white crystalline powder, easily dissolved in water and alcohol, the melting point of 110 ~ 125 ℃, the hydroxyl equivalent of 76-86 g/eq. Were used for liquid hydroxyl resin crosslinking agent.
Primid QM1260, melting point 100 ℃, the hydroxyl equivalent of 100 g/ep. A beta - hydroxypropyl derivatives, its main purpose is to improve XL552 yellowing problem, resistance to gas baking and hydrolysis resistance performance. Its low functionality improvement product Primid SF4510, melting point 100 ℃, the hydroxyl equivalent of 100 g/eq. Improvement in terms of thickness of coating.
In addition, PT910 and 912 low molecular weight epoxy compound, in Europe have passed EINECS (European Inventory of Existing ltd. Chemical Substances). PT910 melting point is 90 ~ 102 ℃, epoxy equivalent of 141 ~ 154 g/eq. PT912 than PT910 has higher reactivity and crosslinking density and melting point is 82 ~ 96 ℃, epoxy equivalent of 141 ~ 154 g/eq.
TGIC activity is poorer, when the design of coating formula, we can consider to choose active match the larger polyester. And active hydroxyl alkyl amide itself is larger, and still need to discharge reaction generated when the moisture. If use the polyester neither reaction too fast to molten coating sufficient flow leveling time, also did not give response produced by the steam flow sufficient discharge time, so that a coating surface defects such as dim is not clear and the pinhole. So, hydroxyl alkyl amide should choose active poor polyester to cooperate.
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.
As a result of TGIC and hydroxyl alkyl amide contrary to the requirement of polyester. Circulate on the market of TGIC and hydroxyl alkyl amide and carboxyl polyester, is take the activity of compromise. So, to attend, not worth accumulates promotion.
As hydroxyl alkyl amide resin for special purpose, should choose low reactivity, low melt viscosity, low glass transition temperature of polyester. Of course, the acid value are relatively low. When choosing polyester, usually through the determination of softening point of the resin and acid value, powder, powder of the gel time of molten liquid to evaluate the applicability of the polyester. So, the design formula will consider multiple spell with polyester, in order to achieve the expected goals.
In addition, TGIC has a single nitrogen atoms in the molecule, due to closed the triazine ring structure, and make it difficult to oxidation stability. Hydroxyl alkyl amide molecule contains two bare nitrogen atoms, lose it is susceptible to oxidation stability, resulting in the yellowing. In the design of formula, choose polyester low acid value, in order to reduce the amount of hydroxyl alkyl amide, or add antioxidant method such as shielding its nitrogen atoms in the molecule, prevent oxidation to enhance stability of it, against the yellowing have certain effect.
Second, TGIC is oil soluble, has good compatibility with carboxyl polyester. And hydroxyl alkyl amide is water soluble, and carboxyl polyester completely incompatible, only scattered in the carboxyl polyester. When processing, should pay attention to the full dispersion in the mixer, select mixing extruder melt extrusion with good effect. Or hydroxyl alkyl amide prepressing dispersed masterbatch to use.
Different coating due to the resin is different, also different to the requirement of the same kind of solvent. BTX aromatics S - 100 main role in the nitro wood coatings for volatile speed regulation, wide range and low initial boiling point can not work very well; BTX aromatics S - 100 in Marine coatings and anticorrosive coatings is not require its volatilizing speed regulation, main effect is cost reduction and regulation construction viscosity, wide distillation range appropriate for use.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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