News Details
Coating application crosslinking agent
2017-6-17 11:43:37
Coating application crosslinking agent
The material quantity ratio increases, the film intensity decreases, the rupture elongation increases. The reason is that the polyether diglycol is mainly based on the direct chain, which mainly increases the performance of the elongation, and the polyether triglycol, in the reaction to the TDI, plays the crosslinking function, which mainly increases the intensity of the film coating. Therefore, the quality of n (diyuanol)/n (tri-terol) is better than the control at 14 ~ 15.
The influence of MOCA content on coating properties of MOCA content of component. MOCA can be used as an extender and curing agent in the production of polyurethane and polyurethane products. The components of the B and NCO content of the different MOCA content are 8.0% of the A component of the membrane.
The increase of MOCA content, the increase of the reaction, make the table drying time shorten, the tensile strength increases, and the fracture elongation decreases first. Reason is modified MOCA crosslinking agent containing four lively hydrogen, high activity, reaction after crosslinking density is big, and benzene ring belongs to rigid chain segments, with the increase of dosage, rigid chain segments increases, the strength enhancement, the breaking elongation rate is increased to a certain degree after began to decline, as the optimized formulation, MOCA content should be controlled in 12% ~ 12%, the performance of coatings film.
The effect of antioxidant content on the coating thermal aging performance in B component. After the membrane of polyurethane coating, the partial chain and group of the molecules break down and cause the film to degrade. Adding a certain amount of antioxidants to the formula can effectively slow down the aging process of the process, and now polyurethane coatings are commonly used in antioxides, which are blocked phenols.
With the increase of antioxidant content, coating treatment strength retention and heat treatment elongation increases, the heat resistant properties of polyurethane coating is improved, when up to 2.0%, the heat treatment performance change is not large, as the optimized formulation, BHT264 should be controlled in 1.5% ~ 2.0%.
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
The effect of the viscosity change of polyurethane coating on construction performance. Polyurethane waterproof coating in the construction, the need to mix part A and part B according to certain proportion mix rear can construction, part A and part B after mixing, begin to reaction, viscosity increases over time, viscosity increasing too fast, will affect the surface performance of the construction.
Therefore, in the course of formulation development, the speed of the control reaction is needed to control the viscosity of the paint mixture, so that the coating has better construction performance. By adjusting the content of catalyst at room temperature (25 ℃) under test coatings in part A and part B mixed after 30 min of viscosity change.
Catalyst T - 9 content at 0.05% ~ 0.10%, the part A and part B mixed after 30 min, in 20000 ~ 30000 mp, s, viscosity and viscosity changes smoothly, not increase sharply, coating the surface of sex is good. After the content of t-9 is greater than 0.1%, the viscosity of the coating is greatly enlarged, which is unfavorable to the construction, so the t-9 content should be in control of 0.05% ~ 0.10%.
This test analyses the NCO content and dibasic alcohol and molar ratio of ternary alcohol, MOCA content, antioxidant content on the properties of coating film, also discusses the content of catalyst T - 9 of part A and part B mixed after the effects of viscosity.
Compared with the test results, the rail with high strength and ratio of polyurethane waterproof coating, NCO content is 8.0% ~ 8.0%, n (glycol)/n (ternary alcohol) amount of substance ratio in 14 ~ 15, MOCA content at 12% ~ 12%, antioxidant BTH264 content at 1.5% ~ 1.5%, catalyst T - 9 content at 0.05% ~ 0.10% of the physical properties of polyurethane waterproof coating and construction to achieve the best performance.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
The material quantity ratio increases, the film intensity decreases, the rupture elongation increases. The reason is that the polyether diglycol is mainly based on the direct chain, which mainly increases the performance of the elongation, and the polyether triglycol, in the reaction to the TDI, plays the crosslinking function, which mainly increases the intensity of the film coating. Therefore, the quality of n (diyuanol)/n (tri-terol) is better than the control at 14 ~ 15.
The influence of MOCA content on coating properties of MOCA content of component. MOCA can be used as an extender and curing agent in the production of polyurethane and polyurethane products. The components of the B and NCO content of the different MOCA content are 8.0% of the A component of the membrane.
The increase of MOCA content, the increase of the reaction, make the table drying time shorten, the tensile strength increases, and the fracture elongation decreases first. Reason is modified MOCA crosslinking agent containing four lively hydrogen, high activity, reaction after crosslinking density is big, and benzene ring belongs to rigid chain segments, with the increase of dosage, rigid chain segments increases, the strength enhancement, the breaking elongation rate is increased to a certain degree after began to decline, as the optimized formulation, MOCA content should be controlled in 12% ~ 12%, the performance of coatings film.
The effect of antioxidant content on the coating thermal aging performance in B component. After the membrane of polyurethane coating, the partial chain and group of the molecules break down and cause the film to degrade. Adding a certain amount of antioxidants to the formula can effectively slow down the aging process of the process, and now polyurethane coatings are commonly used in antioxides, which are blocked phenols.
With the increase of antioxidant content, coating treatment strength retention and heat treatment elongation increases, the heat resistant properties of polyurethane coating is improved, when up to 2.0%, the heat treatment performance change is not large, as the optimized formulation, BHT264 should be controlled in 1.5% ~ 2.0%.
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
The effect of the viscosity change of polyurethane coating on construction performance. Polyurethane waterproof coating in the construction, the need to mix part A and part B according to certain proportion mix rear can construction, part A and part B after mixing, begin to reaction, viscosity increases over time, viscosity increasing too fast, will affect the surface performance of the construction.
Therefore, in the course of formulation development, the speed of the control reaction is needed to control the viscosity of the paint mixture, so that the coating has better construction performance. By adjusting the content of catalyst at room temperature (25 ℃) under test coatings in part A and part B mixed after 30 min of viscosity change.
Catalyst T - 9 content at 0.05% ~ 0.10%, the part A and part B mixed after 30 min, in 20000 ~ 30000 mp, s, viscosity and viscosity changes smoothly, not increase sharply, coating the surface of sex is good. After the content of t-9 is greater than 0.1%, the viscosity of the coating is greatly enlarged, which is unfavorable to the construction, so the t-9 content should be in control of 0.05% ~ 0.10%.
This test analyses the NCO content and dibasic alcohol and molar ratio of ternary alcohol, MOCA content, antioxidant content on the properties of coating film, also discusses the content of catalyst T - 9 of part A and part B mixed after the effects of viscosity.
Compared with the test results, the rail with high strength and ratio of polyurethane waterproof coating, NCO content is 8.0% ~ 8.0%, n (glycol)/n (ternary alcohol) amount of substance ratio in 14 ~ 15, MOCA content at 12% ~ 12%, antioxidant BTH264 content at 1.5% ~ 1.5%, catalyst T - 9 content at 0.05% ~ 0.10% of the physical properties of polyurethane waterproof coating and construction to achieve the best performance.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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