echemi logo
Product
  • Product
  • Supplier
  • Inquiry
    Home > Coatings News > Paints and Coatings Market > Coating classification: two component polyurethane building waterproof coating

    Coating classification: two component polyurethane building waterproof coating

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
    Search more information of high quality chemicals, good prices and reliable suppliers, visit www.echemi.com
    Core tip: Introduction: -NCO / - Oh type two-component polyurethane building waterproof coating is one of the commonly used polyurethane coatings in the market The two-component polyurethane building waterproof coating is composed of A-component containing - NCO prepolymer and B-component containing - Oh active group and crosslinking agent by polyether polyol and isocyanate synthesis Its basic reaction is that - NCO reacts with - oh and - NH2 to form a network structure, so that the membrane has a Fixed strength and elasticity Therefore, the polyurethane waterproof coating can be solidified at room temperature to form a cross-linked coating, which has good adhesion to various substrates Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder coating is a kind of coating with different form from general coating, which is in powder form It is a new type of coating, because of its own advantages and more and more known by people Let's introduce Akzo Nobel Powder coating Akzo Nobel Powder coating is a cost-effective coating solution, which can be applied to different kinds of products After the treatment of static electricity and fire baking, a tough and durable coating surface will be formed, with the least impact on the environment Since the introduction of this technology, powder coating has been able to continue to maintain the Home of coatings: Introduction: - NCO / - Oh two component polyurethane building waterproof The coating is one of the commonly used polyurethane coatings in the market The two-component polyurethane building waterproof coating is composed of A-component containing NCO prepolymer synthesized by polyether polyol and isocyanate and B-component containing - Oh active group and cross-linking agent Its basic reaction is that - NCO reacts with - oh and - NH2 to form a network structure, so that the membrane has certain strength and elasticity Therefore, the polyurethane waterproof coating can be cured at room temperature to form a cross-linked coating, which has good adhesion, flexibility, friction resistance, water resistance and solvent resistance to various substrates, and the appearance of the coating is bright and full Production: Table 1 Basic Formula 1 reference formula for component A and B of two-component polyurethane building waterproof coating component B material name ω /% material name ω /% 52 × 20-25 52 × 28-32 d2000 30-35 d2000 4-7 330n 7-10 BDO 0-1 calcined talcum powder 20-25 modified MOCA 1-3 TDI 10-15 calcined talcum powder 45-55 color paste 0.2 alkane oil 4-6 solvent oil 4-6 T-12 0.02-0.1 Preparation process a component: add polyether polyol, talcum powder, chlorinated paraffin, etc in a certain proportion into a four port flask, raise the temperature to 120 ℃ and keep the pressure above - 0.085 MPa for 2 hours, lower the temperature to 82 ℃ and add TDI reaction for 3 hours, then cool down and discharge Component B: disperse chlorinated paraffin, polyether polyol, alkane oil and powder in a certain proportion, add them to a four port flask, heat up to 120 ℃ and dehydrate for 2 h, cool down to 50 ℃, and mix them evenly with solvent oil, auxiliary agent, liquid Moca, BDO, etc to discharge them Performance test: mix component A and component B according to the mass ratio of 1:2 and mix for 3-5 min to form film, maintain and test under the standard test conditions Standard test conditions: temperature (23 ± 2) ℃, relative humidity (60 ± 15)% surface dry time of coating shall be tested according to 12.2.1 in GB / T 16777-1997, and method B shall be used; dry time of coating shall be tested according to 12.2.2 in GB / T 16777-1997, and method B shall be used; tensile property shall be tested according to 8.2.2 in GB / T 16777-1997, and tested with WDW-5 electronic universal tensile testing machine, with tensile speed of 500 Mm / min; other properties shall be tested according to GB / T 19250-2003 polyurethane waterproof coating national standard Ø test results table 2 main performance test results of polyurethane waterproof coating I II test results tensile strength / MPa ≥ 1.90 ≥ 2.45 2.9 elongation at break /% ≥ 450 ≥ 450 632 tear strength / (n / mm) ≥ 12 ≥ 14 16 low temperature bending / ℃ ≤ 35 ≤ - 35, 2 h crack free impermeability (0.3 MPa, 30 min) impermeability and impermeability solid content /% ≥ 92 96 Surface dry time / h ≤ 8 3 dry time / h ≤ 24 12 wet base adhesion strength / MPa ≥ 0.5 0.8 artificial climate aging tensile strength retention rate /% 80-150 92 elongation at break /% ≥ 300 556 low temperature bending / ℃ ≤ - 30 ≤ - 30, 2h crack free coating home is focused on coating, diatom mud, paint coating, coating technology, fire retardant coating news and coating, Decoration knowledge and effect drawing of diatom mud, paint coating, coating process, fireproof coating,
    This article is an English version of an article which is originally in the Chinese language on echemi.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to service@echemi.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

    Contact Us

    The source of this page with content of products and services is from Internet, which doesn't represent ECHEMI's opinion. If you have any queries, please write to service@echemi.com. It will be replied within 5 days.

    Moreover, if you find any instances of plagiarism from the page, please send email to service@echemi.com with relevant evidence.