Preparation method of red algae based biomass flame-retardant coating
A technology of flame retardant coatings and biomass, applied in fire retardant coatings, epoxy resin coatings, coatings, etc., can solve the problems of affecting the flame retardant efficiency of intumescent flame retardants, easy migration, easy moisture absorption and agglomeration of ammonium polyphosphate, etc. Achieve the effects of wide application range, improved compatibility, and increased flame retardant and smoke suppression efficiency
Active Publication Date: 2019-05-07
沈阳市津浩科技有限公司
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Problems solved by technology
However, there are not many intumescent flame retardants actually used in fireproof coatings. The main reason is that the acid source component ammonium polyphosphate in intumescent flame retardants is easy to absorb moisture and reunite, and is easy to migrate, which greatly affects the flame retardant efficiency of intumescent flame retardants.
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[0023] A novel red algae-based biomass flame-retardant coating and a preparation method thereof, characterized in that the method is that the flame-retardant coating is made of microcapsules coated with nanometer metal hydroxide and melamine by connecting red algae-based biomass with melamine Ammonium polyphosphate is grafted and then compounded with water-based epoxy resin. The specific synthesis steps are as follows:
[0024] Step 1: Dissolve 12g of polyvinyl alcohol and 6g of melamine in 40ml of distilled water, add it to a 500ml three-neck bottle, adjust the pH of the solution to 4.5 with a 5% hydrochloric acid solution, raise the temperature to 90°C, and stir at 300-400r / min for 2.5h. Use 10% sodium carbonate solution to adjust the pH to 7.5, add an oxidizing agent, and react for 0.5h. Use distilled water under the condition of 4500r / min, centrifuge and wash 3 times, and dry at 60°C for 12h to obtain melamine (PMEL) modified by oxidized polyvinyl alcohol.
[0025] Step 2...
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The invention relates to a preparation method of a red algae based biomass flame-retardant coating, and relates to the preparation method of the flame-retardant coating. The flame-retardant coating isobtained by connecting the connecting red algae based biomass with melamine (MEL) to prepare a microcapsule, coating a nano metal hydroxide by the microcapsule to obtain a nano metal hydroxide microcapsule, performing grafting on the nano metal hydroxide microcapsule and ammonium polyphosphate (APP) to obtain an ammonium polyphosphate grafted nano metal hydroxide microcapsule, and compounding theammonium polyphosphate grafted nano metal hydroxide microcapsule with water-based epoxy resin. According to the method provided by the invention, polyvinyl alcohol (PVA) is oxidized to connect to thecarrageen and the melamine, the nano metal hydroxide (Me(OH)X) is coated by a reverse emulsion polymerization manner, the ammonium polyphosphate is grafted on the periphery of a shell layer, the graft polymer is compounded with the epoxy resin, and therefore the flame-retardant coating is obtained; the inorganic flame retardant is connected with the intumescent flame retardant as a whole, so thatthe overall thermal stability of the flame retardant is improved, the synergistic flame-retardant characteristics of the components are fully exerted, and the flame-retardant efficiency of the flameretardant is improved; and the red algae based biomass material is adopted to modify the microcapsule shell layer, so that compatibility of the flame retardant with the coating substrate is increased.
Description
technical field [0001] The invention relates to a method for preparing a flame-retardant coating, in particular to a method for preparing a red algae-based biomass flame-retardant coating. Background technique [0002] Polymer materials are closely related to people's production and life, bringing convenience but also danger. Its flammable and fire-prone characteristics seriously threaten the safety of people's lives and property. It is currently the most commonly used means to apply fire-resistant coatings to the surface of the material substrate to protect the substrate material in case of fire. Metal hydroxide flame retardants are halogen-free, smoke-suppressing, environmentally friendly, and have high flame-retardant efficiency. Adding metal hydroxide flame retardants to coatings to prepare fire-resistant coatings is a common method, but the addition of metal hydroxides The proportion is high, and the compatibility with the coating is poor, which greatly limits its app...
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Login to View More IPC IPC(8): C09D163/00C09D5/18
Inventor 王娜杨菲张静李龙
Owner 沈阳市津浩科技有限公司