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A droplet-free flame retardant polyurethane adhesive and a droplet-free flame retardant reflective thermal paste

A technology of polyurethane glue and polyurethane glue layer, which is applied in the direction of polyurea/polyurethane adhesive, adhesive, film/sheet adhesive, etc., and can solve the problem of long afterburning time, secondary combustion, and affecting flame retardancy, etc. problems, to achieve the effects of high phosphorus content and thermal stability, good synergistic effect, and short afterburn time

Active Publication Date: 2022-07-05
夜视丽新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More importantly, in some fields with high fire safety requirements, ordinary reflective heat stickers cannot meet the needs of use, and reflective products with better flame retardant properties need to be used
[0003] At present, the flame retardant performance of flame retardant reflective products is usually achieved by adding flame retardants to the material to prevent the danger caused by its combustion. etc. itself has good flame retardancy, but the material of the adhesive layer (polyurethane glue) in these flame-retardant reflective products will have a droplet phenomenon at high temperature, and there will be a problem of dripping, which will lead to the adhesive layer after the droplet Hazard of secondary combustion caused by material, etc. dripping onto other substances
For example, in conventional reflective heat stickers, the material of the adhesive layer that glues each layer together is usually made of polyurethane pressure-sensitive adhesive for the compounding of each layer, and for polyurethane pressure-sensitive adhesives, it is also conventional to add a flame retardant to it. To achieve flame retardant properties, the flame retardant of polyurethane materials includes two basic types of flame retardant systems, halogen flame retardant systems and non-halogen flame retardant systems, and halogen flame retardants are usually made by synergistic trioxidation containing bromine flame retardants Antimony, when burning, will produce harmful substances such as dense smoke and hydrogen bromide, and it cannot prevent dripping, and it is prone to dripping when it is on fire, which will affect the flame retardant performance
Another example is the existing conventional flame retardants such as non-halogen inorganic flame retardants such as aluminum hydroxide and aluminum dioxide, as well as organic halogen-free flame retardants or nitrogen-based and phosphorus-based flame retardants, but none of them can To solve the problem of dripping, it is prone to dripping when it is on fire, and there is a long burning time and smoldering phenomenon, which will also cause dangers such as secondary combustion

Method used

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  • A droplet-free flame retardant polyurethane adhesive and a droplet-free flame retardant reflective thermal paste
  • A droplet-free flame retardant polyurethane adhesive and a droplet-free flame retardant reflective thermal paste
  • A droplet-free flame retardant polyurethane adhesive and a droplet-free flame retardant reflective thermal paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The non-droplet flame retardant polyurethane adhesive comprises the following components in mass percentage:

[0040] Spirocyclic phosphate: 5.0%; Aluminum hydroxide: 2.0%; Fumed silica: 6.0%, the particle size of the fumed silica is 200 nm; MPP (melamine phosphate): 3.0%; ADP (diethyl hypophosphorous acid) Aluminum): 10%; the rest is polyurethane, which is equivalent to adding the above-mentioned composite flame retardant to the non-droplet flame retardant polyurethane glue. Wherein the spirocyclic phosphoric acid ester adopts the spirocyclic-cage structure phosphoric acid ester of the following structural formula:

[0041]

[0042] Further, wherein, the polyurethane in the non-droplet flame retardant polyurethane adhesive of the present embodiment is mainly made of the following raw materials in parts by weight:

[0043] Hydroxyethyl methacrylate: 15; Hydroxypropyl acrylate: 10; Methyl methacrylate: 16; Butyl acrylate: 9.0; Acrylic acid: 5.0; 1,4-Butanediol: 8.0; ...

Embodiment 2

[0046] The non-droplet flame retardant polyurethane adhesive comprises the following components in mass percentage:

[0047] Spirocyclic phosphate: 8.0%; Aluminum hydroxide: 4.0%; Fumed silica: 9.0%, the particle size of fumed silica is 300 nm; MPP (melamine phosphate): 2.5%; ADP (diethyl hypophosphorous acid) Aluminum): 8.0%; the rest is polyurethane, which is equivalent to adding the above-mentioned composite flame retardant to the non-droplet flame retardant polyurethane glue. Wherein the spirocyclic phosphoric acid ester adopts the spirocyclic-cage structure phosphoric acid ester of the following structural formula:

[0048]

[0049] Further, wherein, the droplet-free flame retardant polyurethane adhesive of the present embodiment is mainly made of the following raw materials in parts by weight:

[0050] Hydroxyethyl methacrylate: 10; Hydroxypropyl acrylate: 8.0; Methyl methacrylate: 10; Butyl acrylate: 8.0; Acrylic acid: 7.0; 1,4-Butanediol: 5.0; Alcohol: 13; Trimeth...

Embodiment 3

[0053] The non-droplet flame retardant polyurethane adhesive comprises the following components in mass percentage:

[0054]Spiro phosphate: 10%; Aluminum hydroxide: 5.0%; Fumed silica: 8.0%, the particle size of fumed silica is 260 nm; MPP (melamine phosphate): 2.5%; Diethyl calcium hypophosphite: 7.0%; the rest is polyurethane, which is equivalent to adding the above-mentioned composite flame retardant to the non-droplet flame retardant polyurethane glue. Wherein the spirocyclic phosphate adopts the double spirocyclic phosphate of the following structural formula:

[0055]

[0056] Further, wherein, the polyurethane glue of the present embodiment is mainly made of the following raw materials in parts by weight:

[0057] Hydroxyethyl methacrylate: 12; Hydroxypropyl acrylate: 5.0; Methyl methacrylate: 11; Butyl acrylate: 7.0; Acrylic acid: 7.0; 1,4-Butanediol: 6.0; Alcohol: 9.0; Trimethylolpropane: 5.0; Aminoethylaminopropyl Dimethicone: 5.5; Toluene Diisocyanate: 30; Eth...

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Abstract

The invention relates to a non-droplet flame retardant polyurethane adhesive and a non-droplet flame retardant reflective thermal paste. Thermal paste, flame retardant polyurethane adhesive contains a composite flame retardant in mass percentage of the following components: spirocyclic phosphate: 5.0% to 10%; aluminum hydroxide: 2.0% to 5.0%; fumed silica: 6.0% to 9.0 %; melamine phosphate: 2.0% to 3.0%; diethyl hypophosphite: 5.0% to 10%. And the thermal paste comprises a flame-retardant hot-melt adhesive layer, and the flame-retardant hot-melt adhesive layer is sequentially provided with the above-mentioned non-droplet flame-retardant polyurethane adhesive layer and glass microbead layer, and the non-droplet flame-retardant polyurethane adhesive layer and glass microbeads are arranged in sequence. There is a metal coating layer between the layers. Through the synergistic effect of the various components of the flame retardant system, it has the characteristics of effectively no dripping and good flame retardancy, and has the effects of short afterburning time and avoiding smoldering.

Description

technical field [0001] The invention relates to a non-droplet flame-retardant polyurethane adhesive and a non-droplet flame-retardant reflective thermal paste, belonging to the technical field of reflective materials. Background technique [0002] As we all know, the existing reflective thermal stickers use PU or PES as the hot melt adhesive layer, and use the metal-coated glass microbeads to reflect the heat transfer reflective material. In use, the reflective properties of reflective materials such as reflective thermal paste can be used to reflect the incident light back, making it widely used in transportation, fire protection, railways and other fields, and also commonly used in road maintenance and firefighters' safety clothing. The material's reflective properties are used to highlight the wearer's presence for increased safety. More importantly, in some areas with high fire safety requirements, ordinary reflective thermal stickers cannot meet the needs of use, and r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C09J175/04C09J11/04C09J11/06C09J7/30
CPCC09J175/04C09J11/04C09J11/06C09J7/30C08K2003/2227C08K2201/011C08K13/04C08K5/527C08K3/22C08K7/26C08K5/5205C08K5/5313Y02E60/10
Inventor 王爱民郭仁刚凌大新李远斌孙家俊
Owner 夜视丽新材料股份有限公司
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