News Details
Polyurethane waterproof coating USES crosslinking agent
2017-6-17 11:43:33
Polyurethane waterproof coating USES crosslinking agent
Polyurethane material with excellent physical and chemical properties, meet the requirements of high speed railway materials, on the basis of polyurethane (pu), can be made into products are plastic foam, elastomer, coating, adhesive, etc., shockproof, waterproof, and reduce the noise in rail transit, the potting, etc, has been widely used.
In recent years as the rapid development of high-speed railway, polyurethane waterproof coating is more and more widely applied in high-speed rail project, directly used for the waterproof layer of the tensile strength of the polyurethane waterproof coating acuity 6.0 MPa, the elongation at break 450% or higher.
In this paper, based on the requirement of this standard, of polyether polyurethane coating is discussed, isocyanate, crosslinking agent, additives of polyurethane waterproof coating, the influence of the preparation of a kind of high strength of polyurethane waterproof coating that could satisfy the requirement of standard.
Test raw materials: dl-1000d, dl-2000d, ep-330ng: industrial level; Toluene diisocyanate (TDI) : industrial grade; Chlorinated paraffin (52 #) : industrial grade; Calcined talcum powder (1,250 eyes) : industrial; Dibutyl phthalate (DBP) : industrial products; 3, 3 '-dichloro-4' - diamino-diphenyl methane (MOCA) : industrial; Sinic acid (T - 9) : industrial grade; Anti-aging agent BHT264: industrial grade.
The preparation process. Part A: polyether DL - 1000 - d, DL - 2000 - d, EP - 330 ng according to certain proportion to join four flask, temperature to 110 ℃ and keep pressure dehydration 2 h under 0.085 MPa, and cooled to 80 ℃, 3 h, the addition of the TDI reaction temperature and discharge.
Part B: chlorinated paraffin, DBP, EP - 330 ng, MOCA, talcum powder, such as good dispersed by certain proportion, added to the flask, four heats up to 110 ℃ dehydration 2 h, cooled to 50 ℃, join T - 12, can discharge BHT264 stir to mix well.
The main instrument. Electric drying oven: DHG - 9070: DX - 40; Standard curing box: JBY -30b; Electronic universal tensile testing machine: wdw-5.
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.
The performance tests. The part A and part B according to the mass ratio of 1:1 mixture stirring 3 ~ 5 min the membrane, the standard test conditions (temperature (23 + 2) ℃, relative humidity (60 + 15) %) maintenance and testing.
Performance testing was carried out in accordance with terabyte/t2965-2011 "technical conditions for the waterproof layer of railway concrete bridge".
The main performance test results of paint. In accordance with the above A and B components, the high strength polyurethane coating is synthesized and the physical performance test is carried out in accordance with terabyte/t2965-2011. The test results show that all the physical performance indexes of the coating meet the standard requirements, and the performance is good.
The effect of NCO content on coating performance. The B component is fixed, the composition of NCO content is different, and the composition of the B component is 1:1.
When the NCO content, rigid chain segments in A material increase, polar group increased, easy to form hydrogen bonding, coating the crosslinking density increased, sample is hard, the tensile strength is more big. But the addition of rigid segments limits the movement of the chain in the stretching process, which reduces the elongation of the coating. In order to make the coating performance outstanding, the NCO content of A component should be controlled at 8.0% ~ 8.5%.
The effect of polyether polyol on coating properties. DL - 1000 - d in polyether glycol, molar ratio of DL - 2000 - d given conditions, different dibasic alcohol and molar ratio of the ternary alcohol synthesis A material, NCO content in the pre polymers.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Polyurethane material with excellent physical and chemical properties, meet the requirements of high speed railway materials, on the basis of polyurethane (pu), can be made into products are plastic foam, elastomer, coating, adhesive, etc., shockproof, waterproof, and reduce the noise in rail transit, the potting, etc, has been widely used.
In recent years as the rapid development of high-speed railway, polyurethane waterproof coating is more and more widely applied in high-speed rail project, directly used for the waterproof layer of the tensile strength of the polyurethane waterproof coating acuity 6.0 MPa, the elongation at break 450% or higher.
In this paper, based on the requirement of this standard, of polyether polyurethane coating is discussed, isocyanate, crosslinking agent, additives of polyurethane waterproof coating, the influence of the preparation of a kind of high strength of polyurethane waterproof coating that could satisfy the requirement of standard.
Test raw materials: dl-1000d, dl-2000d, ep-330ng: industrial level; Toluene diisocyanate (TDI) : industrial grade; Chlorinated paraffin (52 #) : industrial grade; Calcined talcum powder (1,250 eyes) : industrial; Dibutyl phthalate (DBP) : industrial products; 3, 3 '-dichloro-4' - diamino-diphenyl methane (MOCA) : industrial; Sinic acid (T - 9) : industrial grade; Anti-aging agent BHT264: industrial grade.
The preparation process. Part A: polyether DL - 1000 - d, DL - 2000 - d, EP - 330 ng according to certain proportion to join four flask, temperature to 110 ℃ and keep pressure dehydration 2 h under 0.085 MPa, and cooled to 80 ℃, 3 h, the addition of the TDI reaction temperature and discharge.
Part B: chlorinated paraffin, DBP, EP - 330 ng, MOCA, talcum powder, such as good dispersed by certain proportion, added to the flask, four heats up to 110 ℃ dehydration 2 h, cooled to 50 ℃, join T - 12, can discharge BHT264 stir to mix well.
The main instrument. Electric drying oven: DHG - 9070: DX - 40; Standard curing box: JBY -30b; Electronic universal tensile testing machine: wdw-5.
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.
The performance tests. The part A and part B according to the mass ratio of 1:1 mixture stirring 3 ~ 5 min the membrane, the standard test conditions (temperature (23 + 2) ℃, relative humidity (60 + 15) %) maintenance and testing.
Performance testing was carried out in accordance with terabyte/t2965-2011 "technical conditions for the waterproof layer of railway concrete bridge".
The main performance test results of paint. In accordance with the above A and B components, the high strength polyurethane coating is synthesized and the physical performance test is carried out in accordance with terabyte/t2965-2011. The test results show that all the physical performance indexes of the coating meet the standard requirements, and the performance is good.
The effect of NCO content on coating performance. The B component is fixed, the composition of NCO content is different, and the composition of the B component is 1:1.
When the NCO content, rigid chain segments in A material increase, polar group increased, easy to form hydrogen bonding, coating the crosslinking density increased, sample is hard, the tensile strength is more big. But the addition of rigid segments limits the movement of the chain in the stretching process, which reduces the elongation of the coating. In order to make the coating performance outstanding, the NCO content of A component should be controlled at 8.0% ~ 8.5%.
The effect of polyether polyol on coating properties. DL - 1000 - d in polyether glycol, molar ratio of DL - 2000 - d given conditions, different dibasic alcohol and molar ratio of the ternary alcohol synthesis A material, NCO content in the pre polymers.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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