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Phenolic resin modified polyurethane/polyurea coating and preparation method thereof
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A phenolic resin, polyurethane technology, applied in polyurea/polyurethane coatings, fire-retardant coatings, coatings, etc., can solve the problems of strong acid resistance and high temperature resistance improvement of coatings
Active Publication Date: 2021-09-10
山东尚正新材料科技股份有限公司
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Problems solved by technology
The above technical solutions are all aimed at the functional modification of polyurethane / polyurea coatings for specific application fields, without improving the strong acid resistance and high temperature resistance of the coatings, and are not suitable for some production fields under high temperature, strong acid and strong alkali conditions
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Embodiment 1
[0027] (1) Heat 30kg of phenolic resin and 10kg of chlorinated polyether polyol to 100°C, stir, vacuumize and dehydrate, then cool down to 50°C, add 63kg of MDI-50, react at 100°C for 4 hours, and cool to 50°C to obtain Semi-prepolymer A component, its -NCO mass content is 12%;
[0028] (2) Mix 50kg of polyether polyol DDL-1000, 10kg of amino-terminated polyether ZD-1200, and 0.2kg of diethanolamine evenly to obtain the R component;
[0029] (3) Mix and stir 100kg of component A and 50kg of component R to obtain phenolic resin modified polyurethane / polyurea coating.
Embodiment 2
[0031] (1) Heat 30kg of phenolic resin and 15kg of brominated polyether polyol to 110°C, stir, vacuumize and dehydrate, then cool down to 40°C, add 73kg of carbodiimide modified MDI-50, and react at 100°C for 3 hours , cooled to 40 ° C, to obtain the semi-prepolymer A component, its -NCO mass content is 14%;
[0032] (2) Mix 50kg of polyether polyol DDL-1000, 27.5kg of amino-terminated polyether ZD-1200, and 0.25kg of triethanolamine evenly to obtain the R component;
[0033] (3) Mix and stir 100kg of component A and 50kg of component R to obtain phenolic resin modified polyurethane / polyurea coating.
Embodiment 3
[0035] (1) Heat 30kg of phenolic resin and 17.5kg of chlorinated polyether polyol to 100°C, stir, vacuumize and dehydrate, then cool down to 50°C, add 59kg of TDI, react at 100°C for 4 hours, cool down to 50°C, and obtain half Prepolymer A component, its -NCO mass content is 12%;
[0036] (2) Mix 50kg of polyether polyol DDL-1000, 10kg of amino-terminated polyether ZD-1200, 0.1kg of ethylenediamine and 0.1kg of methyldiethanolamine to obtain the R component;
[0037] (3) Mix and stir 100kg of component A and 50kg of component R to obtain phenolic resin modified polyurethane / polyurea coating.
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Abstract
The invention belongs to the field of polyurethane coatings, in particular to a phenolic resin modified polyurethane / polyurea coating and a preparation method thereof. Described phenolic resin modified polyurethane / polyurea coating comprises A component and R component, wherein A component comprises phenolic resin, halogenated polyether polyol and isocyanate, R component comprises polyether polyol A, terminal amino Polyether B and amine chain extender; halogenated polyether polyol is chlorinated polyether polyol or brominated polyether polyol, functionality 2.5-3.5, relative molecular weight 500-2000, halogen content 8-30wt% . The phenolic resin modified polyurethane / polyurea coating prepared by the present invention greatly enhances the acid and alkali resistance, heat resistance and flame retardancy of the coating, can be used in the production field under high temperature strong acid and strong alkali conditions, and expands the polyurethane / polyurea coating. The scope of application of the urea coating; the present invention also provides its preparation method.
Description
technical field [0001] The invention belongs to the field of polyurethane coatings, in particular to a phenolic resin modified polyurethane / polyurea coating and a preparation method thereof. Background technique [0002] With the gradual improvement of people's requirements for the environment, health and sustainable development, the development of environmentally friendly coatings is the general trend. Polyurethane / polyurea is a new type of solvent-free and high-performance coating developed and developed to meet the needs of environmental protection after powder coatings, light-curing coatings and water-based coatings. At present, the polyurethane / polyurea hybrid system used in China has been applied in building waterproofing, concrete in the electric power or metallurgical industry, coating protection for the inner and outer walls of steel structure facilities with high temperature resistance and anti-corrosion requirements, steel chemical equipment and concrete tanks in ...
Claims
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Application Information
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