News Details
Additive and modified coating crosslinking agent
2017-5-20 19:54:35
Additive and modified coating crosslinking agent
Nco: oh (mass ratio) is 3:1, using three polymerization catalytic reactions, termination reactions, and residues. Process steps: the preparation of polyol - carboxylic acid solution, according to the formula to TMP, neopentyl glycol, benzene partial three anhydride, dmpa, butyl acetate, stir in reaction kettle temperature to 80 ℃ dissolve evenly, up to 140 ℃ backflow to the transparent, cooled to 40 ℃, filter out the standby.
Adduct preparation: according to the formula will enter butyl acetate, toluene reaction kettle stirring return after dehydration temperature to 140 ℃, the cooling to 60 ℃ to join the tdi, nitrogen gas is piped in, adding polyol - carboxylic acid solution to add kettle began drops, the exothermic reaction, and slowly, temperature under 70 ℃ drop out, add 10% tricresyl phosphate liquid, 70 ℃ (4, 5) h reaction.
Detection of nco content was 13.1%, and the free tdi in 12.5%, add 10% SanZheng butyl phosphonic mixture well, up to 85 ℃ (2, 3) h reaction (or temperature to 25 ℃, let stand for 7 d), testing samples free tdi < 0.2%, adding 10% benzoyl chloride solution, 10% dimethyl pyrazole fluid temperature to 90 ℃, reaction 15 min, vacuum relief, from organic solvent, adding hydrophilic solvents, adjust the solid content of 50%, cooled to 50 ℃ 50% triethylamine solution, n - methyl diethanolamine to adjust ph value of 8.5, up to 60 ℃ reaction to transparent, cooled to 40 ℃ to filter out the material.
Crosslinked adhesive and self-crosslinking adhesive. The common adhesive is the diplomatic linking adhesive and self-crosslinking adhesive. Foreign league adhesive containing carboxyl in their molecules (- C00H) or amide group - C - (NH2) and amino (NH3) with plus crosslinking agent of functional groups such as crosslinking reaction of the group.
Self-crosslinking adhesive is contains the molecular chains of the fellowship groups, patients with hydroxymethyl (CH2 - OH), epoxy (CH - CH2), at the same time also have a can participate in the copolymerization of hydroxymethyl acrylamide (CH2 = CH - CONHCH2OH) or epoxy propyl methacrylate (CH2 = C - COOCH2 - CH - CH2) during the copolymerization with other monomers open double to participate in the reaction.
Crosslinked polyvinyl alcohol adhesive. Raw materials and formula polyvinyl alcohol 60 ~ 70, antifoaming agent, a small amount of formaldehyde solution 30 ~ 40, solvent, moderate silane crosslinking agent 0.5 ~ 1.0 preparation method.
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 main steps of preparing the adhesive for the preparation of crosslinked polyvinyl alcohol are as follows.
In three liters of a thermometer, mixer, and drip funnel: water and polyvinyl alcohol in the q flask.
Raise the temperature until the polyvinyl alcohol is completely dissolved.
A certain amount of silane crosslinking agent is added to the flask. It controls the amount of time it takes to make a different product.
(4) to stay behind after crosslinking agent and stirring and cooling. Until the temperature down to room temperature when discharging (5) in order to easily test on properties of the adhesives, coating after crosslinking of polyvinyl alcohol solution in a dry, clean the glass, the film after drying off.
Performance by adding cross-linking agent, polyvinyl alcohol solution to improve the performance of polyvinyl acetal adhesives in the past, greatly increased the product acid, water proofing property. And crosslinked polyvinyl alcohol adhesive is not harmless, it is a good environmental protection material.
Crosslinking is an effective method for improving the performance of water-based polyurethane adhesives, which can improve the water resistance, heat resistance and adhesion strength of the film. The crosslinking of adhesives is divided into internal and external links. The internal crosslinking of adhesives is the introduction of crosslinking agents in synthesis.
Three functional groups such as waterborne polyurethane adhesive used part polyols and isocyanates, introduction of amino or epoxy groups, enclosed isocyanate emulsion, multifunctional crosslinking agent and so on all can be obtained stated waterborne polyurethane.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Nco: oh (mass ratio) is 3:1, using three polymerization catalytic reactions, termination reactions, and residues. Process steps: the preparation of polyol - carboxylic acid solution, according to the formula to TMP, neopentyl glycol, benzene partial three anhydride, dmpa, butyl acetate, stir in reaction kettle temperature to 80 ℃ dissolve evenly, up to 140 ℃ backflow to the transparent, cooled to 40 ℃, filter out the standby.
Adduct preparation: according to the formula will enter butyl acetate, toluene reaction kettle stirring return after dehydration temperature to 140 ℃, the cooling to 60 ℃ to join the tdi, nitrogen gas is piped in, adding polyol - carboxylic acid solution to add kettle began drops, the exothermic reaction, and slowly, temperature under 70 ℃ drop out, add 10% tricresyl phosphate liquid, 70 ℃ (4, 5) h reaction.
Detection of nco content was 13.1%, and the free tdi in 12.5%, add 10% SanZheng butyl phosphonic mixture well, up to 85 ℃ (2, 3) h reaction (or temperature to 25 ℃, let stand for 7 d), testing samples free tdi < 0.2%, adding 10% benzoyl chloride solution, 10% dimethyl pyrazole fluid temperature to 90 ℃, reaction 15 min, vacuum relief, from organic solvent, adding hydrophilic solvents, adjust the solid content of 50%, cooled to 50 ℃ 50% triethylamine solution, n - methyl diethanolamine to adjust ph value of 8.5, up to 60 ℃ reaction to transparent, cooled to 40 ℃ to filter out the material.
Crosslinked adhesive and self-crosslinking adhesive. The common adhesive is the diplomatic linking adhesive and self-crosslinking adhesive. Foreign league adhesive containing carboxyl in their molecules (- C00H) or amide group - C - (NH2) and amino (NH3) with plus crosslinking agent of functional groups such as crosslinking reaction of the group.
Self-crosslinking adhesive is contains the molecular chains of the fellowship groups, patients with hydroxymethyl (CH2 - OH), epoxy (CH - CH2), at the same time also have a can participate in the copolymerization of hydroxymethyl acrylamide (CH2 = CH - CONHCH2OH) or epoxy propyl methacrylate (CH2 = C - COOCH2 - CH - CH2) during the copolymerization with other monomers open double to participate in the reaction.
Crosslinked polyvinyl alcohol adhesive. Raw materials and formula polyvinyl alcohol 60 ~ 70, antifoaming agent, a small amount of formaldehyde solution 30 ~ 40, solvent, moderate silane crosslinking agent 0.5 ~ 1.0 preparation method.
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 main steps of preparing the adhesive for the preparation of crosslinked polyvinyl alcohol are as follows.
In three liters of a thermometer, mixer, and drip funnel: water and polyvinyl alcohol in the q flask.
Raise the temperature until the polyvinyl alcohol is completely dissolved.
A certain amount of silane crosslinking agent is added to the flask. It controls the amount of time it takes to make a different product.
(4) to stay behind after crosslinking agent and stirring and cooling. Until the temperature down to room temperature when discharging (5) in order to easily test on properties of the adhesives, coating after crosslinking of polyvinyl alcohol solution in a dry, clean the glass, the film after drying off.
Performance by adding cross-linking agent, polyvinyl alcohol solution to improve the performance of polyvinyl acetal adhesives in the past, greatly increased the product acid, water proofing property. And crosslinked polyvinyl alcohol adhesive is not harmless, it is a good environmental protection material.
Crosslinking is an effective method for improving the performance of water-based polyurethane adhesives, which can improve the water resistance, heat resistance and adhesion strength of the film. The crosslinking of adhesives is divided into internal and external links. The internal crosslinking of adhesives is the introduction of crosslinking agents in synthesis.
Three functional groups such as waterborne polyurethane adhesive used part polyols and isocyanates, introduction of amino or epoxy groups, enclosed isocyanate emulsion, multifunctional crosslinking agent and so on all can be obtained stated waterborne polyurethane.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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