Spray type elastomer anti-corrosive protective material and its preparing method
A technology of protective materials and elastomers, applied in anti-corrosion coatings and other directions, can solve the problems of high price, limited use field, high product cost, etc., and achieve the effect of reducing product cost and long service life
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Embodiment 1
[0016] Add 54 parts of liquefied MDI (parts by weight, the same below) into the reaction kettle, raise the temperature to 70°C, add 2204 parts of polyether to the kettle, and keep the temperature between 80-100°C for 2 hours to obtain a preform with an NCO% content of 14%. Polymer, this is the A component. Component B is prepared by mixing 25 parts of amino-terminated polyether D2000, 50 parts of high-activity polyether with a molecular weight of 2000, and 25 parts of DETDA and stirring evenly. The AB two-component is applied by the high-pressure airless spraying equipment of the American GUSMAR company. The material can be used for waterproofing and protection of chemical storage tanks and concrete bases. Its main physical properties are as follows:
[0017] Gel time 10 seconds
[0018] Tensile strength 8.6MPa
[0019] Elongation at break 160%
[0020] Tear strength 38KN / M
Embodiment 2
[0023] Put 47 parts of liquefied MDI into the reaction kettle, raise the temperature to 70°C, add 18 parts of pure MDI into the kettle, add 22035 parts of polyether after dissolving, keep it warm at 80-100°C for 2 hours, and obtain 18% NCO% Prepolymer, this is component A. Component B is prepared by mixing 18 parts of amino-terminated polyether D2000, 42 parts of highly reactive polyether with a molecular weight of 2000, 29 parts of DETDA, and 11 parts of TMP, and stirring evenly. The AB two-component is applied by the high-pressure airless spraying equipment of the American GUSMAR company. The material can be used for waterproofing, protection and wear resistance of the concrete base. Its main physical properties are as follows:
[0024] Gel time 5 seconds
[0025] Tensile strength 14MPa
[0026] Elongation at break 130%
[0027] Tear strength 53KN / M
Embodiment 3
[0030] Put 47 parts of liquefied MDI into the reaction kettle, raise the temperature to 70°C, add 18 parts into the kettle, add 22035 parts of polyether after dissolving, keep warm at 80-100°C for 2 hours, and obtain a prepolymer with an NCO% content of 18%. Body, this is the A component. Component B is prepared by mixing 18 parts of amino-terminated polyether D2000, 37 parts of high-activity polyether with a molecular weight of 2000, 9 parts of DETDA, 28 parts of MOCA, and 8 parts of TMP, and stirring evenly. The AB two-component is applied by the high-pressure airless spraying equipment of the American GUSMAR company. The material can be used for anticorrosion and protection of steel base surfaces. Its main physical properties are as follows:
[0031] Gel time 7 seconds
[0032] Tensile strength 17MPa
[0033] Elongation at break 68%
[0034] Tear strength 80KN / M
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