News Details
Application of water-based polyurethane coating crosslinking agent
2017-5-17 23:47:52
Application of water-based polyurethane coating crosslinking agent
After the dyeing of cotton fabric reactive dyes, after the finishing process, the economic and economic development of the water-based polyurethane crosslinking agent was finished.
Type sealed end waterborne polyurethane crosslinking agent on the application effect of cotton fabric, cotton fabric after sealing type waterborne polyurethane crosslinking agent, after finishing the wet rubbing fastness can improve the level 1, level 3 ~ 4.
The differential scanning of the emulsion (DSC). Between 57.08 ℃ and 177.23 ℃ appeared an obvious endothermic peak, this indicates that the synthetic product at 57.08 ℃ began to unlock, but not the degree of reaction, when the temperature rose to 118.33 ℃, the deblocking reaction endothermic peak, explain the unlock the fastest response. After the endothermic peak gradually become smaller, until no absorption peak of 177.23 ℃, explain deblocking temperature has completely. So the sealing type waterborne polyurethane crosslinker deblocking temperature was 118.33 ℃.
With 2, 4 a xylene diisocyanate (TDI), polypropylene glycol (Mn = 400) as raw material, (NCO)/n (OH) ratio is 2.4, the reaction temperature (65 + 1) ℃ conditions 90 min, made of polyurethane pre polymers. With acetone (mass fraction 25%) as solvent, sodium bisulfite (mass fraction 25%) for end capping agent and sodium sulfite accelerator (sodium sulfite and the sodium bisulfite mole fraction ratio 0.2) and pu pre polymers in the temperature of 0 ~ 5 ℃ reaction after 40 min waterborne polyurethane with high sealing side. After the sealing end, the polyurethane is slowly added to the water containing emulsifying agent, stirring to form a coarse emulsion, and then the emulsion of 15min in the high shear emulsifier. Emulsifier aeo. 9 / oep-982 is 3/2, and the quality of the emulsifier is 4% of the quality of the sealing end product, with a solid quantity of about 15%.
The homemade sealing type water-based polyurethane crosslinker deblocking temperature for l18 ℃, cotton fabric after reactive dyeing after the sorting, wet rubbing fastness can promote to level 3 ~ 4 (without finishing the fabric for 2 ~ 3).
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
A polyurethane crosslinking agent of melt spinning spandex production methods, the polyester diol polyether diol or polyester 2 a mixture of alcohol and polyether diol in 100 ~ 140 ℃ under vacuum dewatering 1 ~ 3 hours, cooling to 50 ~ 60 ℃, adding diisocyanate under nitrogen protection, described the polyester diol polyether diol or polyester 2 a mixture of alcohol and polyether glycol and diisocyanate mole ratio is 1:1.5 ~ 1:3, in 70 ~ 80 ℃ under the reaction of 1 ~ 5 hours producing polyurethane crosslinking agent.
The advantage is: the process flow is simple, the production efficiency is high, the production cycle is short, the production cost is low, the equipment investment is little, the application is industrialized production. Of using this method, the crosslinking agent can improve the spinning stability of melt spinning spandex fiber, breaking strength and heat resistant performance, the actual testing of melt spinning spandex fiber fracture strength can reach 1.5 ~ 1.8 CN/dtex, elastic recovery rate: 300% springback 94 ~ 96%, 96%, 96%, heat-resisting performance can improve generally 10 ~ 15 ℃, the highest can reach 140 ℃, and the spinning stability is admirable.
The chemical reactivity of polyether polyol peg-400 is too strong to be controlled; PPG 1, 1000 and PEG 1, 1000 synthetic lotions viscous, this is due to the increase in the quality of the molecular weight of the polyol, on the one hand, the chain's softness increases, the volume increases; On the other hand, relative molecular mass increases, resulting in chain segments through intertwine, dynamic radius decreases, and the particle number increased, enhanced the affinity of particle and water rush, increase viscosity.
By the test results, PPG polyols water resistance than PEG class well, reason may be that PEG type ether or ethylene glycol is mainly composed of ethylene oxide and water addition made, water-soluble high, so the film forming and water resistance are bad. The reaction process and emulsion condition of PPG - 400 is relatively stable, the water is long and the price is cheaper.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
After the dyeing of cotton fabric reactive dyes, after the finishing process, the economic and economic development of the water-based polyurethane crosslinking agent was finished.
Type sealed end waterborne polyurethane crosslinking agent on the application effect of cotton fabric, cotton fabric after sealing type waterborne polyurethane crosslinking agent, after finishing the wet rubbing fastness can improve the level 1, level 3 ~ 4.
The differential scanning of the emulsion (DSC). Between 57.08 ℃ and 177.23 ℃ appeared an obvious endothermic peak, this indicates that the synthetic product at 57.08 ℃ began to unlock, but not the degree of reaction, when the temperature rose to 118.33 ℃, the deblocking reaction endothermic peak, explain the unlock the fastest response. After the endothermic peak gradually become smaller, until no absorption peak of 177.23 ℃, explain deblocking temperature has completely. So the sealing type waterborne polyurethane crosslinker deblocking temperature was 118.33 ℃.
With 2, 4 a xylene diisocyanate (TDI), polypropylene glycol (Mn = 400) as raw material, (NCO)/n (OH) ratio is 2.4, the reaction temperature (65 + 1) ℃ conditions 90 min, made of polyurethane pre polymers. With acetone (mass fraction 25%) as solvent, sodium bisulfite (mass fraction 25%) for end capping agent and sodium sulfite accelerator (sodium sulfite and the sodium bisulfite mole fraction ratio 0.2) and pu pre polymers in the temperature of 0 ~ 5 ℃ reaction after 40 min waterborne polyurethane with high sealing side. After the sealing end, the polyurethane is slowly added to the water containing emulsifying agent, stirring to form a coarse emulsion, and then the emulsion of 15min in the high shear emulsifier. Emulsifier aeo. 9 / oep-982 is 3/2, and the quality of the emulsifier is 4% of the quality of the sealing end product, with a solid quantity of about 15%.
The homemade sealing type water-based polyurethane crosslinker deblocking temperature for l18 ℃, cotton fabric after reactive dyeing after the sorting, wet rubbing fastness can promote to level 3 ~ 4 (without finishing the fabric for 2 ~ 3).
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
A polyurethane crosslinking agent of melt spinning spandex production methods, the polyester diol polyether diol or polyester 2 a mixture of alcohol and polyether diol in 100 ~ 140 ℃ under vacuum dewatering 1 ~ 3 hours, cooling to 50 ~ 60 ℃, adding diisocyanate under nitrogen protection, described the polyester diol polyether diol or polyester 2 a mixture of alcohol and polyether glycol and diisocyanate mole ratio is 1:1.5 ~ 1:3, in 70 ~ 80 ℃ under the reaction of 1 ~ 5 hours producing polyurethane crosslinking agent.
The advantage is: the process flow is simple, the production efficiency is high, the production cycle is short, the production cost is low, the equipment investment is little, the application is industrialized production. Of using this method, the crosslinking agent can improve the spinning stability of melt spinning spandex fiber, breaking strength and heat resistant performance, the actual testing of melt spinning spandex fiber fracture strength can reach 1.5 ~ 1.8 CN/dtex, elastic recovery rate: 300% springback 94 ~ 96%, 96%, 96%, heat-resisting performance can improve generally 10 ~ 15 ℃, the highest can reach 140 ℃, and the spinning stability is admirable.
The chemical reactivity of polyether polyol peg-400 is too strong to be controlled; PPG 1, 1000 and PEG 1, 1000 synthetic lotions viscous, this is due to the increase in the quality of the molecular weight of the polyol, on the one hand, the chain's softness increases, the volume increases; On the other hand, relative molecular mass increases, resulting in chain segments through intertwine, dynamic radius decreases, and the particle number increased, enhanced the affinity of particle and water rush, increase viscosity.
By the test results, PPG polyols water resistance than PEG class well, reason may be that PEG type ether or ethylene glycol is mainly composed of ethylene oxide and water addition made, water-soluble high, so the film forming and water resistance are bad. The reaction process and emulsion condition of PPG - 400 is relatively stable, the water is long and the price is cheaper.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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