News Details
Flame retardant for Waterborne Polyurethane
2017-11-1 11:59:03
Flame retardant for Waterborne Polyurethane
A flame retardant coating was prepared by using E-44 epoxy resin modified waterborne polyurethane as base material, melamine and pentaerythritol as flame retardant. The adhesion, water resistance, water absorption, flame retardancy and thermal weight loss of waterborne polyurethane flame retardant treated with flame retardant were tested. The results showed that the adhesive strength of the modified coating reached 1 grade, the water resistance time was 240h, the water absorption rate was 16.5%, the flame retardant time was more than 10min, and the high temperature resistance and flame retardant performance were improved obviously.
Waterborne polyurethane is also known as waterborne polyurethane or water-based polyurethane. Waterborne polyurethane coating leveling, good film-forming performance, strong hiding power, firmly attached, cold and heat resistance, abrasion resistance, coating elastic emulsion, but its low solid content, coating water resistance and solvent resistance than the solvent, and the relatively low hardness, surface gloss is not high, therefore it is necessary to do the modified.
At present, the most common 3 modification methods of waterborne polyurethane coatings are modified by epoxy resin, modified by organosilicon and modified by acrylic acid. E-44 epoxy resin has the advantages of good rigidity, excellent adhesive and thermal stability, high modulus and high strength.
Waterborne polyurethane emulsion modified by epoxy resin was studied in this paper, as a low cost raw materials, waterborne polyurethane coatings developed new and practical, to replace imported products, gradually replace flammable, toxic, high cost of solvent type polyurethane coatings. Intumescent waterborne polyurethane coatings, due to the mutual association between components and function of coating foam forming foam layer, the foam layer not only cut off the oxygen, and has good insulation performance, can effectively block the heat conduction to the substrate quickly.
In this paper, waterborne polyurethane was added with flame retardant, which made the modified coating have flame retardant effect. Reagent WPU waterborne polyurethane emulsion; E-44 epoxy resin; leveling agent; defoaming agent; flame retardant for waterborne polyurethane; titanium dioxide.
The water borne polyurethane emulsion was added into three flasks to preheat, adding the E-44 ethyl acetate solution of the epoxy resin, adding the antioxidants, stirring at a constant speed. The A component was prepared by adding 0.05% (mass fraction) leveling agent, 0.1% (mass fraction) defoamer, a small amount of silicone and a proper amount of titanium dioxide for a certain period of time.
At room temperature, melamine and pentaerythritol were mixed in a certain proportion to prepare B components. The A component and B component are mixed evenly with an electronic stirrer and diluted with distilled water. 2.3 test methods of 2.3.1 adhesion test according to GB/T9286 - 1998 "paints and varnishes - Cross-cut test", cut 6 parallel cut marks on a good coating pattern with a blade (10~20mm long, cut the distance between 1mm), should cut through the film to the substrate; then, cut the same cut marks 6, with the former vertical, forming 25 small squares, with a method of bonding a finger paint or transparent tape, film to observe the extent of the damage assessment, adhesion grade.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP)
Appearance: Colorless Viscous Liquid
Melting Point: -64 ℃
Boiling Point: 315 ℃
Density: 1.512
Flash Point: 249 ℃
Refractive Index: N20 / D 1.503
Specific Gravity 1.490-1.510
Chlorine Content Of 49.5% ± 0.5
Color Value Max 100
Water Content 0.10% Max
Viscosity (25 ° C) 1500-1800 CPS
Acidity (Mg KOH / G 0.10 Max
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP) Use:
The Product Has A High Efficiency Flame Retardant, Low Volatility, High Thermal Stability, Water Resistance, Alkali Stable And Soluble In Most Organic Substances, Processing Performance, With Plastic, Moisture, Anti-Static, Anti-Pull, Anti-Compression Performance. Widely Used In Unsaturated Polyester, Polyurethane Foam, Epoxy Resin, Phenolic Resin, Rubber, Soft Polyvinyl Chloride, Synthetic Fibers And Other Plastics And Coatings At High Temperature Pyrolysis, Can Be Used As Emulsifier And Explosion-Proof Agent
Water resistance and salt water resistance test according to the national standard GB/T1733 - 1993 "standard" method for determination of water resistance, the sample 2/3 immersed in water, let the paint full contact with water, observe every 24h, and the test results are placed in water after 240h, to observe whether there is a model the loss of light, color, foaming wrinkles, rust and other phenomena.
Water absorption test. Cut out some plastic scrap, said the quality of M1; then the preparation of the coating on the plastic film, the film thickness is about 2mm, to be completely dry after that the quality of M2 plastic sheet; the specimens were immersed in distilled water after coating, soaking at room temperature after 48h, remove the filter paper with the clean surface. The quality of m3.
The formula of water absorption is: water absorption = (M3? M2) / (M3? M1) x 100%. 2.3.4 flame retardant test reference GB15442.2 - 1995 "plate burning method", the use of alcohol lamp coated with flame retardant coating (size 10cm x 10cm) burning. When burning, the alcohol lamp outer flame contact coating plate. Use a stopwatch to record the burn time of plywood.
The thermogravimetric (TG) test was carried out using the German STA449C thermogravimetric analyzer. The temperature range was 25~700 degrees C, and the heating rate was about 10 C/min.
In order to determine the optimum ratio and determine the influence of each factor on the film, orthogonal experiment with 3 factors and 3 levels was selected in the orthogonal experiment design. Extreme value analysis showed that the influence of various factors on water absorption of film order: E-44 epoxy resin proportion and reaction temperature > > reaction time. According to the experimental results, the optimum technological conditions are as follows: the addition amount of epoxy resin is 10% (mass fraction, the same below), the reaction temperature is 70 C, reaction time is 30min.
The modified coating samples were prepared under the above optimum conditions, and the properties of the modified coatings were tested. Modified water film rate was only 16.5%, while the unmodified coating is 32.1%, the modified water absorption rate decreased significantly; adhesion of coating modified coating can reach level 1, adhesion of coating and unmodified coatings for 3; in addition, modified coating at room temperature, soaking in distilled water and 3% 240h (the mass fraction of 168h after soaking in salt water), no blistering or wrinkling, without obvious loss of light color.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
A flame retardant coating was prepared by using E-44 epoxy resin modified waterborne polyurethane as base material, melamine and pentaerythritol as flame retardant. The adhesion, water resistance, water absorption, flame retardancy and thermal weight loss of waterborne polyurethane flame retardant treated with flame retardant were tested. The results showed that the adhesive strength of the modified coating reached 1 grade, the water resistance time was 240h, the water absorption rate was 16.5%, the flame retardant time was more than 10min, and the high temperature resistance and flame retardant performance were improved obviously.
Waterborne polyurethane is also known as waterborne polyurethane or water-based polyurethane. Waterborne polyurethane coating leveling, good film-forming performance, strong hiding power, firmly attached, cold and heat resistance, abrasion resistance, coating elastic emulsion, but its low solid content, coating water resistance and solvent resistance than the solvent, and the relatively low hardness, surface gloss is not high, therefore it is necessary to do the modified.
At present, the most common 3 modification methods of waterborne polyurethane coatings are modified by epoxy resin, modified by organosilicon and modified by acrylic acid. E-44 epoxy resin has the advantages of good rigidity, excellent adhesive and thermal stability, high modulus and high strength.
Waterborne polyurethane emulsion modified by epoxy resin was studied in this paper, as a low cost raw materials, waterborne polyurethane coatings developed new and practical, to replace imported products, gradually replace flammable, toxic, high cost of solvent type polyurethane coatings. Intumescent waterborne polyurethane coatings, due to the mutual association between components and function of coating foam forming foam layer, the foam layer not only cut off the oxygen, and has good insulation performance, can effectively block the heat conduction to the substrate quickly.
In this paper, waterborne polyurethane was added with flame retardant, which made the modified coating have flame retardant effect. Reagent WPU waterborne polyurethane emulsion; E-44 epoxy resin; leveling agent; defoaming agent; flame retardant for waterborne polyurethane; titanium dioxide.
The water borne polyurethane emulsion was added into three flasks to preheat, adding the E-44 ethyl acetate solution of the epoxy resin, adding the antioxidants, stirring at a constant speed. The A component was prepared by adding 0.05% (mass fraction) leveling agent, 0.1% (mass fraction) defoamer, a small amount of silicone and a proper amount of titanium dioxide for a certain period of time.
At room temperature, melamine and pentaerythritol were mixed in a certain proportion to prepare B components. The A component and B component are mixed evenly with an electronic stirrer and diluted with distilled water. 2.3 test methods of 2.3.1 adhesion test according to GB/T9286 - 1998 "paints and varnishes - Cross-cut test", cut 6 parallel cut marks on a good coating pattern with a blade (10~20mm long, cut the distance between 1mm), should cut through the film to the substrate; then, cut the same cut marks 6, with the former vertical, forming 25 small squares, with a method of bonding a finger paint or transparent tape, film to observe the extent of the damage assessment, adhesion grade.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP)
Appearance: Colorless Viscous Liquid
Melting Point: -64 ℃
Boiling Point: 315 ℃
Density: 1.512
Flash Point: 249 ℃
Refractive Index: N20 / D 1.503
Specific Gravity 1.490-1.510
Chlorine Content Of 49.5% ± 0.5
Color Value Max 100
Water Content 0.10% Max
Viscosity (25 ° C) 1500-1800 CPS
Acidity (Mg KOH / G 0.10 Max
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP) Use:
The Product Has A High Efficiency Flame Retardant, Low Volatility, High Thermal Stability, Water Resistance, Alkali Stable And Soluble In Most Organic Substances, Processing Performance, With Plastic, Moisture, Anti-Static, Anti-Pull, Anti-Compression Performance. Widely Used In Unsaturated Polyester, Polyurethane Foam, Epoxy Resin, Phenolic Resin, Rubber, Soft Polyvinyl Chloride, Synthetic Fibers And Other Plastics And Coatings At High Temperature Pyrolysis, Can Be Used As Emulsifier And Explosion-Proof Agent
Water resistance and salt water resistance test according to the national standard GB/T1733 - 1993 "standard" method for determination of water resistance, the sample 2/3 immersed in water, let the paint full contact with water, observe every 24h, and the test results are placed in water after 240h, to observe whether there is a model the loss of light, color, foaming wrinkles, rust and other phenomena.
Water absorption test. Cut out some plastic scrap, said the quality of M1; then the preparation of the coating on the plastic film, the film thickness is about 2mm, to be completely dry after that the quality of M2 plastic sheet; the specimens were immersed in distilled water after coating, soaking at room temperature after 48h, remove the filter paper with the clean surface. The quality of m3.
The formula of water absorption is: water absorption = (M3? M2) / (M3? M1) x 100%. 2.3.4 flame retardant test reference GB15442.2 - 1995 "plate burning method", the use of alcohol lamp coated with flame retardant coating (size 10cm x 10cm) burning. When burning, the alcohol lamp outer flame contact coating plate. Use a stopwatch to record the burn time of plywood.
The thermogravimetric (TG) test was carried out using the German STA449C thermogravimetric analyzer. The temperature range was 25~700 degrees C, and the heating rate was about 10 C/min.
In order to determine the optimum ratio and determine the influence of each factor on the film, orthogonal experiment with 3 factors and 3 levels was selected in the orthogonal experiment design. Extreme value analysis showed that the influence of various factors on water absorption of film order: E-44 epoxy resin proportion and reaction temperature > > reaction time. According to the experimental results, the optimum technological conditions are as follows: the addition amount of epoxy resin is 10% (mass fraction, the same below), the reaction temperature is 70 C, reaction time is 30min.
The modified coating samples were prepared under the above optimum conditions, and the properties of the modified coatings were tested. Modified water film rate was only 16.5%, while the unmodified coating is 32.1%, the modified water absorption rate decreased significantly; adhesion of coating modified coating can reach level 1, adhesion of coating and unmodified coatings for 3; in addition, modified coating at room temperature, soaking in distilled water and 3% 240h (the mass fraction of 168h after soaking in salt water), no blistering or wrinkling, without obvious loss of light color.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian