News Details
Waterbased polyurethane coating crosslinking agent
2017-4-9 23:50:03
Waterborne polyurethane coating crosslinking agent,The use of water-based isocyanate is the most effective way to improve and enhance the coating properties, is also one of the ways to improve the crosslinking density of water-based coatings. So if the construction requirements of high coating, can choose those side effects more severe crosslinking agent, such as Bayhydur XP2655.
For high performance requirements of coatings, can choose less side effects of crosslinking agent, such as 305 and RHODOCOAT Bayhydur WT2102.
Water-based easy dispersibility of crosslinking agent. For water crosslinking agent, easily dispersed in water is also very important, otherwise it will produce such as shrinkage cavity, poor transparency and some problems such as particles. The experiment process is to choose three kinds of crosslinking agent: Bayhydur XP2655, Bayhydur 305, RHODOCOAT WT2102.
Respectively, add the crosslinking agent in waterborne polyurethane coatings, then stir respectively 1 min, 2 min, 3 min, min 4 and 5 min, reoccupy wet membrane preparation of membrane, observe its shrinkage and efflorescence.
Bayhydur XP2655 water dispersion is Bayhydur 305 and RHODOCOAT WT2102 better, simply by hand stir can achieve good dispersion effect. Due to the limited construction conditions, stir in crosslinking agent is generally after manual and time can't more than 5 min, if after 5 min, film or appear white phenomenon, illustrate the crosslinking agent is not suitable for application in the waterborne polyurethane coatings. The above three kinds of crosslinking agent conform to requirements.
The influence of water crosslinking agent for paint film. After different crosslinking agent deployment into paint, paint film of the luster will be different. This is because water crosslinking agent in addition to react with hydroxyl water-based resin, also participated in some side effects, the formation of a chain reaction caused by the different size. This experiment, through the adoption of different cross-linking agent and dosage, observe the change of the coating at 60 ° luster.
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
Use BayhydurXP 2655 as crosslinking agent of paint film burnish relative Bayhyur 305 and RHODOCOATWT 2102 high, used in matte paint gloss low crosslinking agent, so you can avoid using large Numbers of extinction powder, so as to improve the transparency of the film. Used in varnishes can improve the luster of the crosslinking agent, can avoid because cross-linking doses of extinction as a result of the different phenomena.
In two-component water-borne coating, the fouling resistance is an important index, can directly reflect the stand or fall of crosslinking density. This experiment USES the same kind of waterborne coatings, respectively with three kinds of crosslinking agent, respectively is Bayhydur xp2655, Bayhydur 305, RHODOCOAT WT2102, plate as a film, after 24 h and 7 d respectively to test the resistance to the performance of the tea, vinegar and soy sauce.
General observation water crosslinking agent, the activation period is 3 h, if during this time, loss of greater than 40% - NCO content, argues that the crosslinking agent to improve the effect of film performance. General water crosslinking agent and the best activation period is the decline in the - NCO is approximately 30%.
305 and Bayhydur RHODOCOAT WT the fouling resistance of 2102 is more outstanding, crosslinking density. Main is less side effects of the two curing agents, most of the - NCO and - OH, produce dense mesh structure. On the other hand to improve contamination resistance ratio can also be used by raising the - NCO and - OH.
The variety of color change is endless, gorgeous, but all sorts of color and there exists a certain internal relation between coating color is also. In addition to the protective coating anticorrosive and some special functions such as such as mildew, conductive, noise reduction, the main function is the home decorated with colorful life breath. Due to the nature of each color has a alone, however, its vision to people, such as the psychological and physiological have strong different effects.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
For high performance requirements of coatings, can choose less side effects of crosslinking agent, such as 305 and RHODOCOAT Bayhydur WT2102.
Water-based easy dispersibility of crosslinking agent. For water crosslinking agent, easily dispersed in water is also very important, otherwise it will produce such as shrinkage cavity, poor transparency and some problems such as particles. The experiment process is to choose three kinds of crosslinking agent: Bayhydur XP2655, Bayhydur 305, RHODOCOAT WT2102.
Respectively, add the crosslinking agent in waterborne polyurethane coatings, then stir respectively 1 min, 2 min, 3 min, min 4 and 5 min, reoccupy wet membrane preparation of membrane, observe its shrinkage and efflorescence.
Bayhydur XP2655 water dispersion is Bayhydur 305 and RHODOCOAT WT2102 better, simply by hand stir can achieve good dispersion effect. Due to the limited construction conditions, stir in crosslinking agent is generally after manual and time can't more than 5 min, if after 5 min, film or appear white phenomenon, illustrate the crosslinking agent is not suitable for application in the waterborne polyurethane coatings. The above three kinds of crosslinking agent conform to requirements.
The influence of water crosslinking agent for paint film. After different crosslinking agent deployment into paint, paint film of the luster will be different. This is because water crosslinking agent in addition to react with hydroxyl water-based resin, also participated in some side effects, the formation of a chain reaction caused by the different size. This experiment, through the adoption of different cross-linking agent and dosage, observe the change of the coating at 60 ° luster.
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
Use BayhydurXP 2655 as crosslinking agent of paint film burnish relative Bayhyur 305 and RHODOCOATWT 2102 high, used in matte paint gloss low crosslinking agent, so you can avoid using large Numbers of extinction powder, so as to improve the transparency of the film. Used in varnishes can improve the luster of the crosslinking agent, can avoid because cross-linking doses of extinction as a result of the different phenomena.
In two-component water-borne coating, the fouling resistance is an important index, can directly reflect the stand or fall of crosslinking density. This experiment USES the same kind of waterborne coatings, respectively with three kinds of crosslinking agent, respectively is Bayhydur xp2655, Bayhydur 305, RHODOCOAT WT2102, plate as a film, after 24 h and 7 d respectively to test the resistance to the performance of the tea, vinegar and soy sauce.
General observation water crosslinking agent, the activation period is 3 h, if during this time, loss of greater than 40% - NCO content, argues that the crosslinking agent to improve the effect of film performance. General water crosslinking agent and the best activation period is the decline in the - NCO is approximately 30%.
305 and Bayhydur RHODOCOAT WT the fouling resistance of 2102 is more outstanding, crosslinking density. Main is less side effects of the two curing agents, most of the - NCO and - OH, produce dense mesh structure. On the other hand to improve contamination resistance ratio can also be used by raising the - NCO and - OH.
The variety of color change is endless, gorgeous, but all sorts of color and there exists a certain internal relation between coating color is also. In addition to the protective coating anticorrosive and some special functions such as such as mildew, conductive, noise reduction, the main function is the home decorated with colorful life breath. Due to the nature of each color has a alone, however, its vision to people, such as the psychological and physiological have strong different effects.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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