News Details
Methyl ether melamine formaldehyde coating crosslinking agent
2017-5-7 15:37:41
Methyl ether melamine formaldehyde coating crosslinking agent. In a blender, thermometer and three neck flask of condenser, add a certain amount of formaldehyde solution, using triethylamine solution pH adjustment system is 8 ~ 8.5, according to the proportion of adding melamine, slowly rising to about 70 ℃, to dissolve the melamine, system became clear, continue to 20 min.
After cooling to 40 ℃, add methanol with hydrochloric acid to adjust pH 5.5, reacts to heat up to 50 ℃, about 50 min with a standard to judge of water tolerance of reaction degree. After the reaction, the amine regulatory system pH was 8 ~ 9, and the result was a colorless transparent liquid methylene-formaldehyde crosslinking agent (MF).
Preparation of emulsion PAM with etherified melamine-formaldehyde resin (MF)/acrylic resin (PA). According to the different proportion of PA with MF R (solid mass percentage of MF and PA), room temperature, the homemade in the acrylic resin emulsion drops plus quantitative etherified melamine formaldehyde resin MF solution, high-speed mixing 0.5 ~ 1 h, quick solid content is 30% of the modified etherification melamine formaldehyde/acrylic resin blend emulsion, do remember PAM.
Will be made according to the method of preparing the crosslinking modification of PAM emulsion evenly coated on the teflon plate, table dry at room temperature in 100 ℃ oven after crosslinking 3 h, about 1 mm thick film.
The analysis of melamine formaldehyde resin in ether. The solid content of the etherified product was determined according to the method of measuring the solid content of the coating, gb1725-79 (89). The content of free formaldehyde was determined based on the determination of free formaldehyde content in resin finishing agent (gb5544-85). Hydroxymethyl content testing method according to the wood adhesive and resin hydroxymethyl content determination method (GB/T14074.17-1993), using iodine quantity method to determine; The infrared spectra are measured by the ATAVAR360 Fourier transform infrared (fi-ir) analysis test instrument (KBr).
The analysis of PAM emulsion and membrane. The surface viscosity measurement of PAM emulsion is used to measure the viscosity of the surface of the sample using ndda-9s digital display viscosimeter.
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 surface tension of the emulsion is measured by the single tube maximum bubble method. PAM membrane tensile strength and elongation at break of the PAM membrane was tested by KY8000A type electronic universal testing machine and mechanical performance, sample preparation (GB/T528-92; The hardness of the film is tested in gb527-92, using the kylx-a shaw hardness tester, an open source experimental machinery factory in jiangcity.
The SEM of the film was tested by SEM using the s-4800 field emission scanning electron microscope. The thermogravimetric analysis of membrane with German NETZSCH204F1 type thermal analyzer, under the aegis of the N2 flow rate for 10 ml/min, heating speed 10 ℃ / min.
PAM membrane bibulous rate determination: weigh and PAM membrane preparation of good quality as m1, to soak in deionized water at room temperature for 24 h after take out, using filter paper to film on the surface of the water absorption, bibulous rate is calculated after called wet film quality m2:
In the wave number is 3342 cm - 1 stretching vibration peak should be the alcohol, produced in reaction products - OH, because many methylol melamine molecular, the association between the peaks move to low wave digital, and appeared a wide absorption peak. In addition, the wave number is 1056 cm - 1 in figure 1, 1376 cm, 1189 cm - 1-1, the absorption peak of alcohol respectively - C - O - key stretching vibration peak, ethers - C - O - C - key stretching vibration peak and 2, level 3 of amine - C - N - stretching vibration peak, the synthetic products, contains the expected functional groups.
According to the n (C3N6H6) : n (experiment) : n (CH2OH) = 1:4.5:5, the proportion of the synthesis of etherified melamine formaldehyde resin of various physical properties results show that under the experimental conditions of used for crosslinking etherification melamine formaldehyde resin has lower soluble free formaldehyde content, good storage stability and solubility in water.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
After cooling to 40 ℃, add methanol with hydrochloric acid to adjust pH 5.5, reacts to heat up to 50 ℃, about 50 min with a standard to judge of water tolerance of reaction degree. After the reaction, the amine regulatory system pH was 8 ~ 9, and the result was a colorless transparent liquid methylene-formaldehyde crosslinking agent (MF).
Preparation of emulsion PAM with etherified melamine-formaldehyde resin (MF)/acrylic resin (PA). According to the different proportion of PA with MF R (solid mass percentage of MF and PA), room temperature, the homemade in the acrylic resin emulsion drops plus quantitative etherified melamine formaldehyde resin MF solution, high-speed mixing 0.5 ~ 1 h, quick solid content is 30% of the modified etherification melamine formaldehyde/acrylic resin blend emulsion, do remember PAM.
Will be made according to the method of preparing the crosslinking modification of PAM emulsion evenly coated on the teflon plate, table dry at room temperature in 100 ℃ oven after crosslinking 3 h, about 1 mm thick film.
The analysis of melamine formaldehyde resin in ether. The solid content of the etherified product was determined according to the method of measuring the solid content of the coating, gb1725-79 (89). The content of free formaldehyde was determined based on the determination of free formaldehyde content in resin finishing agent (gb5544-85). Hydroxymethyl content testing method according to the wood adhesive and resin hydroxymethyl content determination method (GB/T14074.17-1993), using iodine quantity method to determine; The infrared spectra are measured by the ATAVAR360 Fourier transform infrared (fi-ir) analysis test instrument (KBr).
The analysis of PAM emulsion and membrane. The surface viscosity measurement of PAM emulsion is used to measure the viscosity of the surface of the sample using ndda-9s digital display viscosimeter.
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 surface tension of the emulsion is measured by the single tube maximum bubble method. PAM membrane tensile strength and elongation at break of the PAM membrane was tested by KY8000A type electronic universal testing machine and mechanical performance, sample preparation (GB/T528-92; The hardness of the film is tested in gb527-92, using the kylx-a shaw hardness tester, an open source experimental machinery factory in jiangcity.
The SEM of the film was tested by SEM using the s-4800 field emission scanning electron microscope. The thermogravimetric analysis of membrane with German NETZSCH204F1 type thermal analyzer, under the aegis of the N2 flow rate for 10 ml/min, heating speed 10 ℃ / min.
PAM membrane bibulous rate determination: weigh and PAM membrane preparation of good quality as m1, to soak in deionized water at room temperature for 24 h after take out, using filter paper to film on the surface of the water absorption, bibulous rate is calculated after called wet film quality m2:
In the wave number is 3342 cm - 1 stretching vibration peak should be the alcohol, produced in reaction products - OH, because many methylol melamine molecular, the association between the peaks move to low wave digital, and appeared a wide absorption peak. In addition, the wave number is 1056 cm - 1 in figure 1, 1376 cm, 1189 cm - 1-1, the absorption peak of alcohol respectively - C - O - key stretching vibration peak, ethers - C - O - C - key stretching vibration peak and 2, level 3 of amine - C - N - stretching vibration peak, the synthetic products, contains the expected functional groups.
According to the n (C3N6H6) : n (experiment) : n (CH2OH) = 1:4.5:5, the proportion of the synthesis of etherified melamine formaldehyde resin of various physical properties results show that under the experimental conditions of used for crosslinking etherification melamine formaldehyde resin has lower soluble free formaldehyde content, good storage stability and solubility in water.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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