Non-adhesive flame-retardant coating and heat insulation sheet

Abstract

Based on the total weight of the flame-retardant coating, the flame-retardant coating comprises the following components in percentage by mass: 35%-40% of organic polymer resin, 10%-20% of a flame retardant, 1%-5% of a curing agent and the balance of a solvent. 2%-4% of a cross-linking agent; 0.1% to 0.5% of a surfactant; 8%-10% of pigment and filler; 0.2%-0.5% of a flame retardant; 55%-60% of a solvent; and 0.05%-0.1% of an additive. The non-sticky flame-retardant coating has the beneficial effects that the non-sticky flame-retardant coating has excellent flame retardance and crack resistance, can provide a larger brush coating area due to good covering power, and is small in particle size, not easy to precipitate, fine and smooth in coating hand feeling, good in leveling property, resistant to high temperature and free of after-tack.

Description

Technical Field

[0001] The invention relates to a non-stick flame retardant coating and a heat insulation sheet, belonging to the technical field of heat insulation sheet processing. Background Art

[0002] Flame retardant coating is a coating applied to the surface of combustible substrates that can significantly reduce the flammability of materials, slow down the spread of fire and increase the fire resistance of materials. It can not only improve the combustion characteristics of materials, but also has multiple functions such as decoration, anti-corrosion and anti-rust, thereby extending the service life of the substrate.

[0003] Flame retardant coating on thermal insulation sheet is a special coating designed to improve the fire resistance of thermal insulation sheet, delay the spread of fire and protect its substrate from high temperature damage. Flame retardant coating on thermal insulation sheet is an important fire protection material, which provides reliable fire protection for thermal insulation sheet through its unique flame retardant principle and excellent performance characteristics.

[0004] The flame retardant and crack resistance of existing flame retardant coatings need to be improved, and they are prone to back-sticking. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a non-stick flame retardant coating, which has excellent flame retardant and crack resistance, good covering power, can provide a larger brushing area, has a small particle size, is not easy to precipitate, has a fine coating feel, good leveling, is resistant to high temperatures, and does not stick back.

[0006] The present invention is achieved by the following scheme: the non-stick flame retardant coating, based on the total weight of the flame retardant coating, the flame retardant coating comprises:

[0007] 35%-40% organic polymer resin;

[0008] 2%-4% cross-linking agent;

[0009] 0.1%-0.5% surfactant;

[0010] 8%-10% pigments and fillers;

[0011] 0.2%-0.5% flame retardant:

[0012] 55%-60% solvent;

[0013] 0.05%-0.1% additive.

[0014] Based on the total weight of the flame retardant coating, the flame retardant coating comprises, by mass percentage:

[0015] 35% organic polymer resin;

[0016] 4% cross-linking agent;

[0017] 0.3% surfactant;

[0018] 8.5% pigments and fillers;

[0019] 0.5% Flame Retardant:

[0020] 48.4% solvent;

[0021] 0.1% Additive.

[0022] The organic polymer resin is one of acrylic resin and polyurethane resin.

[0023] The crosslinking agent is an epoxy crosslinking agent.

[0024] The surfactant is one of polyoxyethylene ether and sodium lauryl sulfate.

[0025] The additive is one or more of a preservative, a thickener, a pH regulator, and a defoaming agent.

[0026] The solvent includes at least one of ethylene glycol monobutyl ether, durene, isophorone, diacetone alcohol, propylene glycol methyl ether acetate, naphtha, butyl acetate and methyl acetate.

[0027] A heat insulation sheet comprises: a heat insulation sheet body and a flame retardant layer, wherein the flame retardant layer is formed by curing the flame retardant coating according to any one of claims 1 to 7.

[0028] The heat insulation sheet body is made of aerogel material and has a thickness of 1.6mm-2.1mm.

[0029] The surface of the heat insulation sheet body is provided with grid depressions.

[0030] The beneficial effects of the present invention are:

[0031] 1. The non-stick flame retardant coating of the present invention has excellent flame retardant and crack resistance, good covering power, can provide a larger brushing area, small particle size, not easy to precipitate, fine coating feel, good leveling, high temperature resistance, and no back sticking;

[0032] 2. The heat insulation sheet of the present invention has good flame retardant effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the front cross-sectional structure of the thermal insulation sheet.

[0034] Figure 2 It is a schematic diagram of the top view structure of the heat insulation sheet body of the heat insulation sheet.

[0035] In the figure: 100 is the heat insulation sheet body, 101 is the grid depression, and 200 is the flame retardant layer. DETAILED DESCRIPTION

[0036] Combine the following Figure 1 The present invention is further described, but the protection scope of the present invention is not limited to the described contents.

[0037] For the sake of clarity, not all features of an actual embodiment are described. In the following description, well-known functions and structures are not described in detail because they would obscure the invention with unnecessary detail. It should be recognized that in the development of any actual embodiment, a large number of implementation details must be made to achieve the specific goals of the developer, such as changing from one embodiment to another according to relevant system or relevant business limitations. In addition, it should be recognized that such development work may be complex and time-consuming, but it is merely routine work for those skilled in the art.

[0038] The non-stick flame retardant coating comprises, by mass percentage, based on the total weight of the flame retardant coating:

[0039] 35%-40% organic polymer resin;

[0040] 2%-4% cross-linking agent;

[0041] 0.1%-0.5% surfactant;

[0042] 8%-10% pigments and fillers;

[0043] 0.2%-0.5% flame retardant:

[0044] 55%-60% solvent;

[0045] 0.05%-0.1% additive.

[0046] Example 1

[0047] Based on the total weight of the flame retardant coating, the flame retardant coating comprises, by mass percentage:

[0048] 35% organic polymer resin, the organic polymer resin is acrylic resin.

[0049] 4% cross-linking agent, the cross-linking agent is an epoxy cross-linking agent, specifically epichlorohydrin.

[0050] 0.3% surfactant, the surfactant is sodium dodecyl sulfate.

[0051] 8.5% pigments and fillers;

[0052] 0.5% Flame Retardant:

[0053] 48.4% solvent, the solvent is a mixture of ethylene glycol monobutyl ether and methyl acetate.

[0054] 0.1% additives, additives include thickeners and defoamers.

[0055] Aerogel felt was prepared according to the formula in Example 1, and its appearance was a flowing black liquid with a relative density of 1.4-1.5; tackiness: no tack at 0.5kg / cm (70°C); pH value: 8-9; fineness: ≤40um, surface drying time: ≤30min (25°C); solid content: ≥45%; and odor: a slight aromatic smell.

[0056] The aerogel felt was tested, and the test items included halogen (fluorine, chlorine, bromine, iodine) content and combustion performance. The test method for halogen (fluorine, chlorine, bromine, iodine) content was: EN 14582:2016, IC was used for analysis, and the test method for combustion performance was: TAL-1011.

[0057] The test results are as follows:

[0058] 1. Halogen (fluorine, chlorine, bromine, iodine) content test results are shown in Table 1

[0059] Test items Test results (mg / kg) Limit value (mg / kg) Method detection limit (mg / kg) fluorine Not detected -- 50 chlorine Not detected 900 50 bromine Not detected 900 50 iodine Not detected -- 50 Fluorine + Chlorine Not detected 1500 --

[0060] 2. Combustion performance test

[0061] Test conditions:

[0062] 1. Sample processing

[0063] 1.1 Treat in an environment of (23±2)℃, (50±10)%RH for at least 48h.

[0064] 1.2 Treat in an air circulation oven for 168 hours, then treat in an environment of (23±2)℃, (50±10)%RH for at least 4 hours. Interior parts temperature: (70±2)℃; exterior parts, chassis, powertrain packaging components temperature: (100±2)℃.

[0065] 2 Methods:

[0066] Move the flame to (10±1) mm from the bottom of the sample, stay there for (10±0.5) s, and then immediately move the flame away. After moving the flame away, record the duration t1 of the flame burning on any sample, and record the afterglow time t3 after t1 ends.

[0067] Once the flame on the sample stops burning, a flame should be immediately applied to the same sample, with the flame at a distance of (10±1) mm from the bottom of the residual sample and staying for (10±0.5) s. The flame should then be removed immediately. After the test flame is removed, the duration t2 of the flame burning on any sample should be recorded, and the afterglow time t4 should be recorded after t1 ends.

[0068] The above series of specified tests shall be repeated on the remaining four samples in each group.

[0069] The test results are shown in Table 2:

[0070]

[0071] Example 2

[0072] Based on the total weight of the flame retardant coating, the flame retardant coating comprises, by mass percentage:

[0073] 40% organic polymer resin, wherein the organic polymer resin is one of acrylic resin and polyurethane resin.

[0074] 4% cross-linking agent, the cross-linking agent is an epoxy cross-linking agent.

[0075] 0.5% surfactant, the surfactant is one of polyoxyethylene ether and sodium lauryl sulfate.

[0076] 10% pigments and fillers;

[0077] 0.5% Flame Retardant:

[0078] 0.1% additives, the additives are one or more of preservatives, thickeners, pH regulators, and defoaming agents.

[0079] The rest is solvent, which is a mixture of propylene glycol methyl ether acetate and naphtha.

[0080] Example 3

[0081] Based on the total weight of the flame retardant coating, the flame retardant coating comprises, by mass percentage:

[0082] 35% organic polymer resin, wherein the organic polymer resin is polyurethane resin.

[0083] 2% cross-linking agent, the cross-linking agent is an epoxy cross-linking agent.

[0084] 0.1% surfactant, the surfactant is polyoxyethylene ether.

[0085] 8% pigments and fillers;

[0086] 0.2% Flame Retardant:

[0087] 0.1% additives, the additives are a mixture of preservatives, thickeners, pH regulators, and defoamers;

[0088] The rest is solvent, and the solvent is methyl acetate.

[0089] Example 4

[0090] Reference Figure 1A heat insulation sheet comprises: a heat insulation sheet body 100 and a flame retardant layer 200, wherein the flame retardant layer 200 is formed by curing the flame retardant coating, and the heat insulation sheet body 100 is made of aerogel material with a thickness of 2.1 mm.

[0091] The flame retardant coating ingredients are as follows:

[0092] 35% organic polymer resin, the organic polymer resin is acrylic resin.

[0093] 4% cross-linking agent, the cross-linking agent is an epoxy cross-linking agent, specifically epichlorohydrin.

[0094] 0.3% surfactant, the surfactant is sodium dodecyl sulfate.

[0095] 8.5% pigments and fillers;

[0096] 0.5% Flame Retardant:

[0097] 48.4% solvent, the solvent is a mixture of ethylene glycol monobutyl ether and methyl acetate.

[0098] 0.1% additives, additives include thickeners.

[0099] Stir the paint evenly before coating. The construction environment temperature should be above 5°C and the relative humidity should be below 85%.

[0100] The thermal insulation sheet coated with the flame retardant layer 200 is tested according to the testing standard T / CSTM 00193-2020.

[0101] The test results are shown in Table 3.

[0102]

[0103] Example 5

[0104] A heat insulation sheet comprises: a heat insulation sheet body 100 and a flame retardant layer 200, wherein the flame retardant layer 200 is formed by curing a flame retardant coating, and the heat insulation sheet body 100 is made of aerogel material and has a thickness of 1.6 mm.

[0105] In order to further enhance the lamination performance of the flame retardant layer, a grid recess 101 is provided on the surface of the heat insulation sheet body 100 .

[0106] Although the technical solutions of the present invention have been described and listed in detail, it should be understood that it is obvious to those skilled in the art to make modifications to the above embodiments or adopt equivalent alternatives. These modifications or improvements made without departing from the spirit of the present invention are within the scope of protection required by the present invention.

Claims

1. A non-stick flame retardant coating, characterized in that: Based on the total weight of the flame retardant coating, the flame retardant coating comprises, by mass percentage: 35%-40% organic polymer resin; 2%-4% cross-linking agent; 0.1%-0.5% surfactant; 8%-10% pigments and fillers; 0.2%-0.5% flame retardant: 55%-60% solvent; 0.05%-0.1% additive.

2. The non-stick flame retardant coating according to claim 1, characterized in that: Based on the total weight of the flame retardant coating, the flame retardant coating comprises, by mass percentage: 35% organic polymer resin; 4% cross-linking agent; 0.3% surfactant; 8.5% pigments and fillers; 0.5% Flame Retardant: 48.4% solvent; 0.1% Additive.

3. The non-stick flame retardant coating according to claim 1, characterized in that: The organic polymer resin is one of acrylic resin and polyurethane resin.

4. The non-stick flame retardant coating according to claim 1, characterized in that: The cross-linking agent is an epoxy cross-linking agent.

5. The non-stick flame retardant coating according to claim 1, characterized in that: The surfactant is one of polyoxyethylene ether and sodium lauryl sulfate.

6. The non-stick flame retardant coating according to claim 1, characterized in that: The additive is one or more of a preservative, a thickener, a pH regulator, and a defoaming agent.

7. The non-stick flame retardant coating according to claim 1, characterized in that: The solvent includes at least one of ethylene glycol monobutyl ether, durene, isophorone, diacetone alcohol, propylene glycol methyl ether acetate, naphtha, butyl acetate and methyl acetate.

8. A heat insulation sheet, characterized in that: include: A heat insulation sheet body (100) and a flame retardant layer (200), wherein the flame retardant layer (200) is formed by curing the flame retardant coating according to any one of claims 1 to 7.

9. The heat insulation sheet according to claim 8, characterized in that: The heat insulation sheet body (100) is made of aerogel material and has a thickness of 1.6 mm to 2.1 mm.

10. The heat insulation sheet according to claim 9, characterized in that: The surface of the heat insulation sheet body (100) is provided with grid recesses (101).

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