Flame retardation cladding adhesive for polystyrene prefoamed beads, and product thereof

Abstract

The invention provides a flame retardation cladding adhesive for polystyrene prefoamed beads, and a product thereof, and concretely relates to a flame retardation cladding adhesive specially used for cladding polystyrene prefoamed beads, and a modified polystyrene flame retardation foam sheet made by using the flame retardation cladding adhesive. The polystyrene prefoamed bead flame retardation cladding adhesive adopting modified urea formaldehyde resin with toughening and film forming performances as an adhesion medium has excellent flame retardation characteristic, and can effectively improve the flame retardation performance of a polystyrene foam material; and the modified urea formaldehyde resin with toughening and film forming performances adopted in the invention allows a weak acidic substance to be used as a curing agent of the flame retardation cladding adhesive, so damages of a strong acid curing agent similar to phenolic resin to human bodies, environment and apparatuses are avoided.

Description

technical field

[0001] The patent of the present invention has invented a flame-retardant coating glue specially used for coating polystyrene pre-expanded beads and a modified polystyrene flame-retardant foam board made of this flame-retardant coating glue. Background technique

[0002] Polystyrene foam material has a closed-cell honeycomb structure. It is this closed-cell structure that makes polystyrene insulation boards have excellent properties such as light weight, insulation, heat insulation, shock resistance, and sound insulation. They are widely used in construction, light industry, shipping and other fields. However, with the improvement of national requirements on the fire performance of building insulation materials, traditional polystyrene insulation boards have been difficult to meet the requirements of laws and regulations. Therefore, improving the fire performance of traditional polystyrene insulation materials and preparing flame-retardant polystyrene insula...

Examples

Embodiment 1

[0040] Example 1 Synthesis of modified urea-formaldehyde resin characterized by toughening and film-forming properties

[0041] First add 100 kg of formaldehyde (37%) to the reaction kettle, use 30% sodium hydroxide solution to adjust the pH value of the formaldehyde solution to 8-8.5, then add 18.5 kg of urea (industrial grade), 11 kg of melamine (industrial one grade), 1.2 kg of polyvinyl alcohol, 3 kg of diethanolamine and 5.5 kg of resorcinol, start stirring and heat up to 85°C, and keep the temperature for 35 minutes. Then add 30% acetic acid solution, adjust the pH value of the reaction solution to about 5-6, then add 17 kg of urea, keep at 80°C to continue the reaction for 15-25 minutes, when the reaction solution appears fog point, immediately use 30% hydrogen The sodium oxide solution makes the pH of the reaction solution reach 7-7.5 to terminate the polycondensation reaction. Add 1.8 kilograms of urea, 5 kilograms of polyvinyl acetate emulsion (solid content of 50% ...

Embodiment 2

[0044] Embodiment 2 Preparation of modified flame retardant coating glue

[0045] In a 200L cylinder, add 60 kilograms of modified urea-aldehyde resins characterized by toughening and film-forming properties obtained in Example 1, then add 0.6 kilograms of BYK-W909 and 3 kilograms of dodecyl Sodium sulfonate, then add 0.18 kg of KH-550 and stir at a high speed of 800-1000r / m for 3 minutes. Then, under stirring, slowly add 19 kg of ammonium polyphosphate, 5 kg of zinc borate, 5 kg of calcium carbonate powder, 3.5 kg of fly ash, 0.5 kg of bentonite and 2,32 kg of iron oxide red. Then use a high-speed disperser to disperse at a high speed of 1000-1500r / m for 15 minutes. Finally, add 1.8kg of a mixture of ammonium chloride and phosphoric acid (1:1 by weight) and stir for 2 minutes at a speed of 800-1000r / m to obtain a uniform and fine iron-red flame-retardant coating glue with a solid content of 82-83%, the viscosity (25°C) is 2000-3000mPa.s.

Embodiment 4

[0049] Embodiment 4 Wet coating of modified flame retardant glue 2

[0050] Add 3.6M 3 (about 53.4 kilograms) of polystyrene pre-expanded beads (diameter is 3-4mm), slowly and evenly add 104 kilograms of modified flame-retardant coating glues made by embodiment 2 under stirring state, continuously stir 10 minutes ,stand-by.

technical field

[0001] The patent of the present invention has invented a flame-retardant coating glue specially used for coating polystyrene pre-expanded beads and a modified polystyrene flame-retardant foam board made of this flame-retardant coating glue. Background technique

[0002] Polystyrene foam material has a closed-cell honeycomb structure. It is this closed-cell structure that makes polystyrene insulation boards have excellent properties such as light weight, insulation, heat insulation, shock resistance, and sound insulation. They are widely used in construction, light industry, shipping and other fields. However, with the improvement of national requirements on the fire performance of building insulation materials, traditional polystyrene insulation boards have been difficult to meet the requirements of laws and regulations. Therefore, improving the fire performance of traditional polystyrene insulation materials and preparing flame-retardant polystyrene insula...

Examples

Embodiment 1

[0040] Example 1 Synthesis of modified urea-formaldehyde resin characterized by toughening and film-forming properties

[0041] First add 100 kg of formaldehyde (37%) to the reaction kettle, use 30% sodium hydroxide solution to adjust the pH value of the formaldehyde solution to 8-8.5, then add 18.5 kg of urea (industrial grade), 11 kg of melamine (industrial one grade), 1.2 kg of polyvinyl alcohol, 3 kg of diethanolamine and 5.5 kg of resorcinol, start stirring and heat up to 85°C, and keep the temperature for 35 minutes. Then add 30% acetic acid solution, adjust the pH value of the reaction solution to about 5-6, then add 17 kg of urea, keep at 80°C to continue the reaction for 15-25 minutes, when the reaction solution appears fog point, immediately use 30% hydrogen The sodium oxide solution makes the pH of the reaction solution reach 7-7.5 to terminate the polycondensation reaction. Add 1.8 kilograms of urea, 5 kilograms of polyvinyl acetate emulsion (solid content of 50% ...

Embodiment 2

[0044] Embodiment 2 Preparation of modified flame retardant coating glue

[0045] In a 200L cylinder, add 60 kilograms of modified urea-aldehyde resins characterized by toughening and film-forming properties obtained in Example 1, then add 0.6 kilograms of BYK-W909 and 3 kilograms of dodecyl Sodium sulfonate, then add 0.18 kg of KH-550 and stir at a high speed of 800-1000r / m for 3 minutes. Then, under stirring, slowly add 19 kg of ammonium polyphosphate, 5 kg of zinc borate, 5 kg of calcium carbonate powder, 3.5 kg of fly ash, 0.5 kg of bentonite and 2,32 kg of iron oxide red. Then use a high-speed disperser to disperse at a high speed of 1000-1500r / m for 15 minutes. Finally, add 1.8kg of a mixture of ammonium chloride and phosphoric acid (1:1 by weight) and stir for 2 minutes at a speed of 800-1000r / m to obtain a uniform and fine iron-red flame-retardant coating glue with a solid content of 82-83%, the viscosity (25°C) is 2000-3000mPa.s.

Embodiment 4

[0049] Embodiment 4 Wet coating of modified flame retardant glue 2

[0050] Add 3.6M 3 (about 53.4 kilograms) of polystyrene pre-expanded beads (diameter is 3-4mm), slowly and evenly add 104 kilograms of modified flame-retardant coating glues made by embodiment 2 under stirring state, continuously stir 10 minutes ,stand-by.

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