Curing agent for epoxy resin and epoxy adhesive used at ultralow temperature
A technology of epoxy adhesive and epoxy resin, which is applied in the direction of epoxy resin glue, adhesive additive, non-polymer adhesive additive, etc., which can solve the problem of bad smell, strong skin irritation, and blooming of cured products etc., to achieve the effects of reducing the curing temperature range, simple preparation process, and simple mixing process
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[0033] Example (1)
[0034] Weigh 95g bisphenol A type epoxy resin E-51 (epoxy value 0.48-0.54), 5g benzyl glycidyl ether, 120g silicon micropowder as component A;
[0035] Weigh 15g of ultra-low temperature curing agent, 35g of polyamide, 2g of 2,4,6-tris(dimethylaminomethyl)phenol, 2g of γ-aminopropyltriethoxysilane, 8g of epoxy group and terminal carboxyl group and BE with unsaturated double bonds, 158g silicon micropowder, as component B.
[0036] Freeze the two components A and B at a low temperature of 0 to -5 °C for 2 hours, then mix A and B in a 1:1 ratio by weight, using No. 45 steel sheet as the material to be adhered, according to GB7124- 86 standard to prepare steel shear samples, prepare tensile strength samples according to GB / T699-1999 standard, prepare hardness test samples according to GB531-83 standard, put the samples in a refrigerator at -15 ℃, and record at the same time The gel time and initial solidification time were tested for various mechanical prop...
Example
[0037] Example (2)
[0038] Weigh 95g bisphenol A type epoxy resin E-51 (epoxy value 0.48-0.54), 5g benzyl glycidyl ether, 120g silicon micropowder as component A;
[0039] Weigh 25g of ultra-low temperature curing agent, 25g of polyamide, 2g of 2,4,6-tris(dimethylaminomethyl)phenol, 2g of γ-aminopropyltriethoxysilane, 8g of epoxy group and terminal carboxyl group and BE with unsaturated double bonds, 158g silicon micropowder, as component B.
[0040]Freeze the two components A and B at a low temperature of 0 to -5 °C for 2 hours, then mix A and B in a 1:1 ratio by weight, using No. 45 steel sheet as the material to be adhered, according to GB7124- 86 standard to prepare steel shear samples, prepare tensile strength samples according to GB / T699-1999 standard, prepare hardness test samples according to GB531-83 standard, put the samples in a refrigerator at -15 ℃, and record at the same time The gel time and initial solidification time were tested for various mechanical prope...
Example
[0041] Example (3)
[0042] Weigh 95g bisphenol A type epoxy resin E-51 (epoxy value 0.48-0.54), 5g benzyl glycidyl ether, 120g silicon micropowder as component A;
[0043] Weigh 35g of ultra-low temperature curing agent, 15g of polyamide, 2g of 2,4,6-tris(dimethylaminomethyl)phenol, 2g of γ-aminopropyltriethoxysilane, 8g of epoxy group and terminal carboxyl group and BE with unsaturated double bonds, 158g silicon micropowder, as component B.
[0044] Freeze the two components A and B at a low temperature of 0 to -5 °C for 2 hours, then mix A and B in a 1:1 ratio by weight, using No. 45 steel sheet as the material to be adhered, according to GB7124- 86 standard to prepare steel shear samples, prepare tensile strength samples according to GB / T699-1999 standard, prepare hardness test samples according to GB531-83 standard, put the samples in a refrigerator at -15 ℃, and record at the same time The gel time and initial solidification time were tested for various mechanical prop...
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