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What is a hardener? What does the hardener do?

Source: http://www.heqichem.com/news/6.html   Release time: 2018-09-06

Curing agent - a processing aid that solidifies a substance. For example, curing agent is one of the necessary materials for curing epoxy resin, otherwise epoxy resin will not cure. In order to meet the requirements of various application fields, appropriate hardener should be used. There are many types of curing agents, which are introduced below:


Fatty polyamine ethylenediamine


6-8 per 100 standard resins for EDA H2NCH2CH2NH2 molecular weight 60 reactive hydrogen equivalent 15 colorless liquid. Used for bonding, pouring and coating. This kind of amine increases with molecular weight, viscosity, volatility, toxicity and performance. But they are high in heat release and short in duration. In general, the larger their molecular weight is, the less affected by the amount of fit. Long-term contact with fatty polyamines can cause dermatitis, their steam is very toxic, the operation should be very careful. diethylenetriamine


DETA H2NC2H4NHC2H4NH2 molecular weight 103 reactive hydrogen equivalent 20.6 colorless liquid for 8-11 parts per 100 standard resins. Curing: 20 ℃ + 100 ℃ for 30 minutes or 2 hours 20 ℃ for 4 days. Performance: the applicable period of 50 grams of 25 ℃ for 45 minutes, thermal deformation temperature of 95-124 ℃, the bending strength of 1000-1160 kg/cm2, the compressive strength of 1120 kg/cm2, the tensile strength of 780 kg/cm2, elongation is 5.5%, the impact strength


0.4-pound/inch rockwell hardness 99-108 Dielectric constant (50 hz, 23 ℃), power factor 4.1 (50 hz, 23 ℃) 0.009 2 x1016 volume resistance


Ω - cm at room temperature curing, toxicity, heat quantity, suitable period is short. triethyleneteta

H2NC2H4NHC2H4NHC2H4NH2


Molecular weight of 146 active hydrogen equivalent 24.3 colorless viscous liquid resin with 10 to 13 per 100 standard curing: 20 ℃ + 100 ℃ for 30 minutes or 2 hours 20 ℃ for 7 days. Performance: the applicable period of 50 grams of 25 ℃ for 45 minutes, thermal deformation temperature of 98-124 ℃, the bending strength of 950-1200 kg/cm2, the compressive strength of 1100 kg/cm2, the tensile strength of 780 kg/cm2, elongation is 4.4%, the impact strength


0.4-pound/inch rockwell hardness 99-106. Curing at room temperature, slightly lower toxicity than diethylenetriamine, high heat release, short application period. Tetraethylenepentamine TEPA


H2NC2H4 (NHC2H4) 3NH2 molecular weight 189 reactive hydrogen equivalent 27 brown liquid for every 100 parts of standard resin used 11-15 parts of performance as above. Polyethylene polyamine PEPA

Performance of 14 to 15 parts per 100 standard resins for H2NC2H4 (NHC2H4) nNH2 pale yellow liquid: low toxicity, low volatility, long application period and low price. DPTA H2N (CH2) 3NH (CH2) 3NH2


Molecular weight 131 reactive hydrogen equivalent 26 pale yellow liquid per 100 parts standard resin used 12-15 parts performance with the same TETA. Dimethylamine propyl amine DMAPA


(CH3) 2N (CH2) 3NH2 low viscosity transparent liquid USES 4-7 parts per 100 parts of standard resin, which is highly toxic. It has two reactions: curing and catalyzing. Diethylamine propyl amine DEAPA (C2H5) 2N


(CH2) 3 nh2 molecular weight 130 active hydrogen equivalent 65 low viscosity transparent liquid resin with 4 to 8 per 100 standard curing: 60-70 ℃ for 4 hours. Performance: the applicable period of 50 grams of 25 ℃ for 4 hours, heat distortion temperature 78-94 ℃, 920-1050 kg/cm2, compressive strength tensile strength of 480-640 kg/cm2, the impact strength


0.2-pound/inch rockwell hardness 90-98. Dielectric constant (50 hz, 23 ℃), power factor 3.75 (50 hz, 23 ℃) 0.007


Medium temperature curing and low temperature performance is good. TMD (H2N) 2 (C6H9) (CH3) 3 colorless liquid cold curing, long application period, small toxicity. Every 100 standard resin with 21 curing: + 150 ℃ 80 ℃ for 1 hour, 2 hours. Performance: the applicable period 400 grams of 50 minutes 25 ℃ and 50 ℃ for 10 minutes, Martin heat resistant 92 ℃, bending strength, 1150 kg/cm2, the impact strength


20 kg - 0.0009 cm/cm2 tg delta (23 ℃, and 100 c/S) surface resistance 5.4 x1011 Ω (300 v) volume resistance 9 x1015 Ω. Cm (300 v) in the curing temperature, low temperature performance is good. dihexylamine


H2N (CH2) 6NH (CH2) 6NH2




Diamine modifier

Unknown AMINE248 formula is transparent liquid viscosity 25 ℃ per 100 1000-3000 CPS standard resin curing with 4 to 8 of room temperature to 100 ℃. Less toxicity, good flexibility. Diamine adduct


CH-2, L2505. Unknown amine value 160-210




CH3


Amine value 400-500 low viscosity transparent liquid 60 parts per 100 standard resins HDA H2N (CH2) 6NH2 molecular weight 116


Active hydrogen equivalent 29 colorless flaky crystal melting point 42 ℃ per 100 standard resin with 12 to 15 toxicity large, can be cured at room temperature but is not good. Shorter application period. Three methyl diamine molecular weight per 100 158 standard resin with 20 to 25 copies of curing: 20 ℃ + 100 ℃ for 30 minutes or 2 hours 20 ℃ for 7 days. Performance: the applicable period of 50 grams of 25 ℃ for 45 minutes, thermal deformation temperature of 105 ℃, the bending strength of 1150 kg/cm2, the tensile strength of 650 kg/cm2, elongation is 4.4%, the impact strength


0.4 feet - pounds per inch. Dielectric constant (50 hz, 23 ℃), power factor 4.0 (50 hz, 23 ℃) 0.001 9 x1015 volume resistance


Ω - cm




Diethylamine DEA HN (C2H5) 2 molecular weight 73 reactive hydrogen equivalent 73 colorless liquid with 12 parts per 100 standard resins have both curing and catalytic reactions. Polyether diamine H2N (CH2) nO (CH2CH2O) mNH2

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