Spray polyurea elastomer for mine, preparation and construction method thereof
A polyurea elastomer, mining technology, applied in coatings, devices for coating liquid on the surface, etc., can solve problems such as poor wear resistance, and achieve excellent flexibility, excellent adhesion, and good adhesion
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Embodiment 1
[0043] A consists of about 15 parts of 2,4'-diphenylmethane diisocyanate and 41 parts of 4,4'-diphenylmethane diisocyanate and 44 parts of polyepoxide with a molecular weight of 1000 and a functionality of 2. Propane ether diol (TDiol-1000, Tianjin Petrochemical No. 3 Plant) prepared prepolymer. The NCO content of the prepolymer was (15±0.1)%. The R component consists of T-5000 amino resin, D-2000, D-400, DETDA amino resin and TiO 2 The composition of the mixture. Accurately weigh the various raw materials in the R component according to the formula, add them into the paint tank, and stir at high speed for 30 minutes with high-speed shearing and dispersing equipment.
[0044] The isocyanate index of this system was 1.10. The specific ratio is shown in the table below.
[0045]
[0046] A and R components are sprayed with high-pressure collision mixing spraying equipment at a volume ratio of 1:1. Spray the coating onto a PVC panel coated with a release agent. Aft...
Embodiment 2
[0050] A consists of about 15 parts of 2,4'-diphenylmethane diisocyanate and 41 parts of 4,4'-diphenylmethane diisocyanate and 44 parts of polytetrahydrofuran ether with a molecular weight of 1000 and a functionality of 2. Alcohol (PTMG-1000, BASF, Germany) prepared prepolymer. The NCO content of the prepolymer is (15±0.1)%, and the viscosity at 25° C. is about 1200 cps. The R component consists of T-5000 amino resin, D-2000, D-400, DETDA amino resin and TiO 2 The composition of the mixture. Accurately weigh the various raw materials in the R component according to the formula, add them into the paint tank, and stir at high speed for 30 minutes with high-speed shearing and dispersing equipment.
[0051] The isocyanate index of this system was 1.10. The specific ratio is shown in the table below.
[0052]
[0053] A and R components are sprayed with high-pressure collision mixing spraying equipment at a volume ratio of 1:1. Spray the coating onto a PVC panel coate...
Embodiment 3
[0057] A consists of about 30 parts of 2,4'-diphenylmethane diisocyanate and 26 parts of 4,4'-diphenylmethane diisocyanate and 44 parts of polytetrahydrofuran ether with a molecular weight of 1000 and a functionality of 2 Diol (PTMG-1000, BASF, Germany) prepared prepolymer. The NCO content of the prepolymer is (15±0.1)%, and the viscosity at 25° C. is about 1200 cps. The R component consists of T-5000 amino resin, D-2000, D-4000, DETDA amino resin, TiO 2 , mica powder mixture. Accurately weigh the various raw materials in the R component according to the formula, add them into the paint tank, and stir at high speed for 30 minutes with high-speed shearing and dispersing equipment.
[0058] The isocyanate index of this system was 1.10. The specific ratio is shown in the table below.
[0059]
[0060] A and R components are sprayed with high-pressure collision mixing spraying equipment at a volume ratio of 1:1. Spray the coating onto a PVC panel coated with a releas...
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