Marine water-resistant flame-retardant white glue and preparation method thereof

Abstract

The invention discloses marine water-resistant flame-retardant white glue which comprises modified VAE emulsion composed of 30-60 parts of VAE emulsion and 10-20 parts of PVA emulsion, 20-30 parts of phosphorus-nitrogen flame retardant, 5-12.5 parts of flame-retardant synergist zinc borate, 1-3 parts of 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 2-16 parts of dispersing agent, 10-15 parts of aluminum hydroxide and 1 part of distilled water, and the aluminum hydroxide is more than 2000 meshes; the invention further discloses a preparation method. According to the water-resistant flame-retardant white glue, the peel strength is not reduced, meanwhile, the water resistance is improved, the density of the adhesive is reduced, the weight of a ship body is reduced, and the requirements for flame retardance and safety performance are met.

Description

Technical Field

[0001] The invention belongs to the technical field of flame retardants, relates to white glue for ships, and specifically relates to water-resistant and flame-retardant white glue for ships, and a preparation method thereof. Background Art

[0002] By adding flame retardants, the white glue for ships improves the flame retardant properties while reducing the conventional properties. It is easy to age after construction and has low peel strength. Moreover, the density is significantly increased by adding more flame retardants, which is generally 1.4g / cm 3 above.

[0003] VAE emulsion is one of the most commonly used engineering materials. Although it has certain flame retardant properties, its flame retardant mechanism is mainly based on gas phase flame retardant mechanism and it does not have a charring effect. However, it is difficult to pass the BS-5852:2006 flame retardant test standard using VAE emulsion alone.

[0004] Moreover, conventional commercially available VAE emulsions do not control the degree of branching and functional group production, and have a large number of hydrophilic groups on the surface, resulting in poor water resistance after film formation, which does not meet the conditions for ship use. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, one of the objects of the present invention is to provide a light, flame-retardant, non-toxic water-based ethylene-vinyl acetate copolymer (VAE emulsion) white glue.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a marine water-resistant flame-retardant white glue, wherein the components of the formula include a premixed emulsion modified VAE emulsion composed of 30 to 60 parts of VAE emulsion and 10 to 20 parts of PVA emulsion, 20 to 30 parts of phosphorus nitrogen flame retardant, 5 to 12.5 parts of flame retardant synergist, 1 to 3 parts of film-forming aid dodecyl alcohol ester, 2 to 16 parts of dispersant, 10 to 15 parts of aluminum hydroxide and 1 part of distilled water; the aluminum hydroxide is above 2000 meshes, and the flame retardant synergist is zinc borate.

[0007] Furthermore, it also includes a thickener, wherein the thickener is 1 part of TT935 or 5.5 parts of carboxymethyl cellulose.

[0008] Furthermore, the phosphorus-nitrogen flame retardant is a combination of two or more of ammonium polyphosphate, melamine pyrophosphate, melamine, and zinc oxide.

[0009] Furthermore, the dispersant is a combination of two or more of sodium polyacrylate, sodium tripolyphosphate, polyoxyethylene fatty acid ester, sodium lauryl sulfate, and pentaerythritol.

[0010] The second object of the present invention is to provide a method for preparing a marine water-resistant and flame-retardant white glue, the steps of which are as follows: (1) Add phosphorus-nitrogen flame retardant, zinc borate, film-forming aid dodecyl alcohol ester, a small amount of dispersant, aluminum hydroxide, and distilled water into a reactor for grinding, high-speed stirring, and dispersion to prepare a flame retardant liquid with a certain solid content; (2) Adding VAE emulsion and PVA emulsion into a stirrer and stirring until the system is uniform and there is no obvious unevenness on the liquid surface, thereby obtaining a modified VAE emulsion; (3) compounding the flame retardant liquid obtained in step (1) and the modified VAE emulsion obtained in step (2), stirring at high speed, and dispersing the system until the system is uniform, so that the diameter of the latex particles is less than 10 μm, to obtain a flame retardant emulsion; (4) Add a thickener and a film-forming aid to the flame-retardant emulsion described in step (3), and stir thoroughly to obtain a lightweight, water-resistant, flame-retardant white glue.

[0011] The beneficial effects of the present invention are: The modified VAE emulsion of the present invention uses low molecular weight VAE emulsion raw materials with low branching degree and adds acetylated polyvinyl alcohol (PVA) as a stabilizer during the preparation process to increase the water resistance of the VAE emulsion. The flame retardant is pre-dispersed first to make the flame retardant more evenly dispersed in the emulsion system, and the prepared flame retardant latex has good storage stability; by adjusting the composition of the flame retardant, the ratio of the flame retardant liquid and the emulsion, the coating adhesive can be prepared to meet the customer's requirements for different flame retardant levels; The water-resistant flame-retardant white glue prepared by the present invention has a better effect than the effect of directly adding the flame retardant into the emulsion for dispersion. The surface of the prepared flame-retardant coating is beautiful and has no defects such as uneven coating. At the same time, the product adopts an appropriate proportion of inorganic flame retardant and flame retardant synergist as the flame retardant system, which can not only isolate oxygen and heat on the surface of the glued building, but also have the effect of suppressing smoke. The basic parameters of the lightweight water-resistant and flame-retardant white glue prepared in the present invention meet the following requirements: density <1.15 g / cm 3 , limiting oxygen index ≥30, room temperature peel strength ≥13.5N / cm, non-volatile matter content 40-55%, actual drying time ≤12h, storage stability ≥12 months. Safety performance meets the performance requirements for bulkheads, linings or ceilings in Part 2 and Part 5 of Annex 1 of the 2010 FTP Rules. Smoke toxicity meets the identification standards of relevant national institutions. DETAILED DESCRIPTION

[0012] In order to further understand the content, characteristics and positive benefits of the present invention, the present invention is further described in detail below in conjunction with specific implementation cases, but the implementation methods of the present invention are not limited to the following embodiments. Example 1

[0013] The present embodiment discloses a marine water-resistant and flame-retardant white glue, and the preparation steps are as follows.

[0014] First, add 10 parts of ammonium polyphosphate, 5 parts of melamine pyrophosphate, 5 parts of zinc oxide and 5 parts of zinc borate, 2 parts of sodium tripolyphosphate, 1 part of polyoxyethylene fatty acid ester, 10 parts of aluminum hydroxide and 1 part of distilled water into a disperser for grinding, high-speed stirring and dispersion to prepare a flame retardant liquid with a certain solid content; add 50 parts of VAE emulsion and 10 parts of PVA emulsion into a stirrer, stir and prepare a modified VAE emulsion; compound the prepared flame retardant liquid and the modified VAE emulsion, stir and disperse at high speed until the system is uniform, and make the latex particle diameter less than 10 μm; finally, add 1 part of water-based thickener TT935 into the flame retardant emulsion to achieve thickening effect, and 1 part of dodecyl alcohol ester to help film formation, stir and filter fully to obtain water-resistant flame retardant white glue. Example 2

[0015] The present embodiment discloses a marine water-resistant and flame-retardant white glue, and the preparation steps are as follows.

[0016] First, add 20 parts of ammonium polyphosphate, 10 parts of melamine, 12.5 parts of zinc borate, 10 parts of pentaerythritol, 3 parts of sodium polyacrylate, 3 parts of sodium lauryl sulfate, 15 parts of aluminum hydroxide and 1 part of distilled water into a disperser for grinding, high-speed stirring and dispersion to prepare a flame retardant liquid with a certain solid content; add 60 parts of VAE emulsion and 10 parts of PVA emulsion into a stirrer, stir and prepare a modified VAE emulsion; compound the prepared flame retardant liquid and the modified VAE emulsion, stir and disperse at high speed until the system is uniform, so that the diameter of the latex particles is less than 10 μm; finally, add 5.5 parts of carboxymethyl cellulose into the flame retardant emulsion to achieve a thickening effect, and 2 parts of dodecyl alcohol ester help film formation, and stir fully to obtain a water-resistant flame retardant white glue. Example 3

[0017] The present embodiment discloses a marine water-resistant and flame-retardant white glue, and the preparation steps are as follows.

[0018] First, add 20 parts of ammonium polyphosphate, 7.5 parts of melamine, 12.5 parts of zinc borate, 8 parts of pentaerythritol, 3 parts of sodium polyacrylate, 3 parts of sodium lauryl sulfate, 15 parts of aluminum hydroxide and 1 part of distilled water into a disperser for grinding, high-speed stirring and dispersion to prepare a flame retardant liquid with a certain solid content; add 40 parts of VAE emulsion and 15 parts of PVA emulsion into a stirrer, stir and prepare a modified VAE emulsion; compound the prepared flame retardant liquid and the modified VAE emulsion, stir and disperse at high speed until the system is uniform, so that the diameter of the latex particles is less than 10 μm; finally, add 5.5 parts of carboxymethyl to the flame retardant emulsion to achieve a thickening effect, and 3 parts of dodecyl alcohol ester to help film formation, and stir fully to obtain a water-resistant flame retardant white glue. Example 4

[0019] The present embodiment discloses a marine water-resistant and flame-retardant white glue, and the preparation steps are as follows.

[0020] First, add 10 parts of ammonium polyphosphate, 7 parts of melamine pyrophosphate, 5 parts of zinc oxide and 7 parts of zinc borate, 1 part of sodium tripolyphosphate, 1 part of polyoxyethylene fatty acid ester, 12 parts of aluminum hydroxide and 1 part of distilled water into a disperser for grinding, high-speed stirring and dispersion to prepare a flame retardant liquid with a certain solid content; add 35 parts of VAE emulsion and 15 parts of PVA emulsion into a stirrer, stir and prepare a modified VAE emulsion; compound the prepared flame retardant liquid and the modified VAE emulsion, stir and disperse at high speed until the system is uniform, and make the latex particle diameter less than 10 μm; finally, add 1 part of water-based thickener TT935 and 1 part of dodecyl alcohol ester into the flame retardant emulsion to help film formation, stir and filter sufficiently to obtain water-resistant flame retardant white glue. Example 5

[0021] The present embodiment discloses a marine water-resistant and flame-retardant white glue, and the preparation steps are as follows.

[0022] First, add 10 parts of ammonium polyphosphate, 5 parts of melamine pyrophosphate, 5 parts of zinc oxide and 10 parts of zinc borate, 1 part of sodium tripolyphosphate, 1 part of polyoxyethylene fatty acid ester, 15 parts of aluminum hydroxide and 1 part of distilled water into a disperser for grinding, high-speed stirring and dispersion to prepare a flame retardant liquid with a certain solid content; add 30 parts of VAE emulsion and 20 parts of PVA emulsion into a stirrer, stir and prepare a modified VAE emulsion; compound the prepared flame retardant liquid and the modified VAE emulsion, stir and disperse at high speed until the system is uniform, and make the latex particle diameter less than 10 μm; finally, add 1 part of water-based thickener TT935 into the flame retardant emulsion to achieve thickening effect, and 1 part of dodecyl alcohol ester to help film formation, stir and filter fully to obtain water-resistant flame retardant white glue.

[0023] The water-resistant and flame-retardant white glue prepared by the present invention is mainly used for bonding fireproof panels and decorative white cloth in the shipbuilding process, and is a single-component water-based glue. The adhesive performance test results are shown in the following table.

[0024] .

[0025] The above embodiments are only intended to illustrate the technical solutions of the present invention, rather than all embodiments. Any modifications, equivalent substitutions and improvements made within the principles of the present invention are all within the protection scope of the present invention.

Claims

1. A water-resistant and flame-retardant white glue for marine use, characterized in that: The invention comprises a modified VAE emulsion composed of 30 to 60 parts of VAE emulsion and 10 to 20 parts of PVA emulsion, 20 to 30 parts of phosphorus-nitrogen flame retardant, 5 to 12.5 parts of flame retardant synergist, 1 to 3 parts of dodecyl alcohol ester, 2 to 16 parts of dispersant, 10 to 15 parts of aluminum hydroxide and 1 part of distilled water; the aluminum hydroxide has a mesh size of more than 2000, and the flame retardant synergist is zinc borate.

2. The marine water-resistant and flame-retardant white glue according to claim 1, characterized in that: The invention also comprises a thickener, wherein the thickener is 1 part of TT935 or 5.5 parts of carboxymethyl cellulose.

3. A marine water-resistant and flame-retardant white glue according to claim 1 or 2, characterized in that: The phosphorus-nitrogen flame retardant is a combination of two or more of ammonium polyphosphate, melamine pyrophosphate, melamine and zinc oxide.

4. The marine water-resistant and flame-retardant white glue according to claim 3, characterized in that: The dispersant is a combination of two or more of sodium polyacrylate, sodium tripolyphosphate, polyoxyethylene fatty acid ester, sodium lauryl sulfate and pentaerythritol.

5. A method for preparing the marine water-resistant and flame-retardant white glue as claimed in claim 1, characterized in that: Here are the steps: (1) First, add phosphorus-nitrogen flame retardant, zinc borate, dodecyl alcohol ester and dispersant, aluminum hydroxide, and distilled water into a disperser for grinding, high-speed stirring, and dispersion to prepare a flame retardant liquid; (2) Adding VAE emulsion and PVA emulsion into a stirrer and stirring until the system is uniformly dispersed to obtain a modified VAE emulsion; (3) The flame retardant liquid and the modified VAE emulsion are mixed, stirred, and dispersed until the system is uniform, so that the diameter of the latex particles is less than 10 μm, thereby obtaining a flame retardant emulsion; (4) Add thickener and film-forming aid into the flame retardant emulsion and stir thoroughly to obtain water-resistant flame retardant white glue for marine use.