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One-component thermal-conductive reactive flame-retardant polyurethane hot melt adhesive and preparation method thereof

A polyurethane hot-melt adhesive and reactive flame-retardant technology, which is applied in the field of structural adhesives, can solve the problems of polluted products, easy to precipitate coating surface, etc., and achieve the effects of improving flame retardancy, solving chemical resistance, and not being prone to air bubbles

Inactive Publication Date: 2019-06-07
SHUNDE POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the defoamer cannot participate in the reaction, it is easy to precipitate on the surface of the coating and pollute the product

Method used

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  • One-component thermal-conductive reactive flame-retardant polyurethane hot melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] It is a one-component thermally conductive reactive flame retardant polyurethane hot melt adhesive, which is prepared by the following steps:

[0030] Step 1 Synthesis of isocyanate-modified polysilicone acrylate flame retardant copolymer

[0031]18 parts of methacryloxypropyl monoblocked dimethyl polysiloxane MAPDMS, 15 parts of allyl dimethyl phosphate DMAP, 20 parts of methyl acrylate MA and 7 parts of methacrylic acid iso The cyanoethyl ester ICEMA was dissolved in 70 parts of toluene, controlled at 80°C, and under the protection of nitrogen, 2.5 parts of thermal initiator tert-amyl peroxide 2-ethylhexanoate was added, and the polymerization reaction was carried out for 3 hours, and then removed by rotary evaporation. After toluene, the isocyanate-modified polyorganosilicon acrylate flame-retardant copolymer is obtained. The number-average molecular weight of the isocyanate-modified polyorganosilicon acrylate flame-retardant copolymer is 6000, and its chemical struc...

Embodiment 2

[0035] It is a one-component thermally conductive reactive flame retardant polyurethane hot melt adhesive, which is prepared by the following steps:

[0036] Step 1 Synthesis of isocyanate-modified polysilicone acrylate flame retardant copolymer

[0037] 25 parts of methacryloxypropyl monoblocked dimethyl polysiloxane MAPDMS, 24 parts of allyl dimethyl phosphate DMAP, 10 parts of methyl acrylate MA and 8 parts of methacrylic acid iso The cyanoethyl ester ICEMA was dissolved in 70 parts of toluene, controlled at 90°C, and under the protection of nitrogen, 1.8 parts of thermal initiator tert-amyl peroxide 2-ethylhexanoate was added, the reaction was polymerized for 15 hours, and removed by rotary evaporation. After toluene, the isocyanate-modified polyorganosilicon acrylate flame-retardant copolymer is obtained. The number-average molecular weight of the isocyanate-modified polyorganosilicon acrylate flame-retardant copolymer is 14000, and its chemical structure is: poly(methacr...

Embodiment 3

[0041] It is a one-component thermally conductive reactive flame retardant polyurethane hot melt adhesive, which is prepared by the following steps:

[0042] Step 1 Synthesis of isocyanate-modified polysilicone acrylate flame retardant copolymer

[0043] 35 parts of methacryloxypropyl monoblocked dimethylpolysiloxane MAPDMS, 40 parts of allyl dimethyl phosphate DMAP, 10 parts of methyl acrylate MA and 12 parts of methacrylic acid iso The cyanoethyl ester ICEMA was dissolved in 100 parts of toluene, controlled at 85°C, and under the protection of nitrogen, 1.2 parts of thermal initiator tert-amyl peroxide 2-ethylhexanoate was added, and the polymerization reaction was carried out for 9 hours, and removed by rotary evaporation. After toluene, the isocyanate-modified polyorganosilicon acrylate flame-retardant copolymer is obtained. The number-average molecular weight of the isocyanate-modified polyorganosilicon acrylate flame-retardant copolymer is 21000, and its chemical structu...

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Abstract

The invention discloses a one-component thermal-conductive reactive flame-retardant polyurethane hot melt adhesive and a preparation method thereof. The hot melt adhesive is characterized by comprising the following components: 1-30 parts of a polyether diol, 1-30 parts of a liquid polyester diol, 1-40 parts of a flame-retardant polyether polyol, 1-50 parts of a crystalline polyester diol, 1-30 parts of an isocyanate-containing modified organosilicon acrylate flame-retardant copolymer, 1-40 parts of isocyanate, 0.01-4 parts of a catalyst, 0.01-3 parts of an antioxidant, 20-120 parts of a thermal-conductive filler, and 0.1-6 parts of a silane coupling agent. According to the hot melt adhesive and method provided by the invention, poly(methacryloxypropyl mono-terminated dimethylpolysiloxane-random-dimethyl allylphosphonate-random-methyl acrylate-random-isocyanatoethyl methacrylate) is firstly synthesized and added into a polyurethane prepolymer, the thermal-conductive filler is added, high-efficiency dispersion is performed, an organosilicon acrylate copolymer chain segment and a reactive flame retardant are introduced, and therefore chemical resistance, flame-retardant properties and thermal conductivity of the polyurethane hot melt adhesive are improved.

Description

technical field [0001] The invention belongs to the technical field of structural adhesives, and in particular relates to a single-component thermally conductive reactive flame-retardant polyurethane hot melt adhesive and a preparation method thereof, which are mainly used in structural bonding fields such as the electronics and electrical industry, the automobile industry, and power battery assembly. . Background technique [0002] Polyurethane hot melt adhesive is a new generation of structural adhesive that can provide excellent bonding performance. It is a type of hot melt adhesive made of polyurethane prepolymer as the main material and various additives. Polyurethane hot-melt adhesives are easy to use and environmentally friendly, and their performance is comparable to solvent-based hot-melt adhesives. In the past ten years, polyurethane hot melt adhesives have been rapidly developed and widely used in high-end fields such as the electronics and electrical industries,...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J11/06C09J11/04
Inventor 刘锋陈燕舞路风辉霍应鹏唐秋实彭琦洪丹何炜
Owner SHUNDE POLYTECHNIC
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