Flame retardant moisture-curing polyurethane hot melt adhesive with excellent aging resistance, and preparation method thereof

A polyurethane hot-melt adhesive and moisture curing technology, applied in the field of structural adhesives, can solve the problems of reducing the aging resistance of polyurethane hot-melt adhesive coatings, solve the problem of insufficient chemical corrosion resistance, improve initial viscosity, improve Compatibility effect

Inactive Publication Date: 2019-04-19
SHUNDE POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These non-reactive system tackifying resins cannot participate in curing to form a cross-linked network, which easily reduces the aging resistance of polyurethane hot melt adhesive coatings

Method used

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  • Flame retardant moisture-curing polyurethane hot melt adhesive with excellent aging resistance, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] It is a flame-retardant moisture-cured polyurethane hot-melt adhesive with excellent aging resistance, which is prepared by the following steps:

[0027] Step 1 Synthesis of phosphorus-containing flame-retardant polyorganosilicon acrylate copolymer

[0028] 11 parts of methacryloxypropyl monoblocked dimethyl polysiloxane MAPDMS, 13 parts of 2-methyl-2-acrylic acid-2-hydroxyethyl phosphate HMP, 18 parts of butyl acrylate Ester BA and 3 parts of hydroxyethyl methacrylate HEMA were dissolved in 60 parts of toluene, controlled at 85 °C, under nitrogen protection, 1.6 parts of thermal initiator tert-amyl peroxide 2-ethylhexanoate was added, After 45 hours of polymerization reaction, after the toluene was removed by rotary evaporation, a phosphorus-containing flame-retardant polyorganosilicon acrylate copolymer was obtained. The number-average molecular weight of the phosphorus-containing flame-retardant polyorganosilicon acrylate copolymer was 15,000, and its chemical struct...

Embodiment 2

[0032] It is a flame-retardant moisture-cured polyurethane hot-melt adhesive with excellent aging resistance, which is prepared by the following steps:

[0033] Step 1 Synthesis of phosphorus-containing flame-retardant polyorganosilicon acrylate copolymer

[0034] 16 parts of methacryloxypropyl monoblocked dimethyl polysiloxane MAPDMS, 26 parts of 2-methyl-2-acrylic acid-2-hydroxyethyl phosphate HMP, 25 parts of butyl acrylate Ester BA and 4 parts of hydroxyethyl methacrylate HEMA were dissolved in 80 parts of toluene, controlled at 90 ° C, under nitrogen protection, 1.2 parts of thermal initiator tert-amyl peroxide 2-ethylhexanoate was added, After 30 hours of polymerization reaction, after removing toluene by rotary evaporation, a phosphorus-containing flame-retardant polyorganosilicon acrylate copolymer was obtained. The number-average molecular weight of the phosphorus-containing flame-retardant polyorganosilicon acrylate copolymer was 22000, and its chemical structure was...

Embodiment 3

[0038] It is a flame-retardant moisture-cured polyurethane hot-melt adhesive with excellent aging resistance, which is prepared by the following steps:

[0039] Step 1 Synthesis of phosphorus-containing flame-retardant polyorganosilicon acrylate copolymer

[0040] 17 parts of methacryloxypropyl monoblocked dimethylpolysiloxane MAPDMS, 30 parts of 2-methyl-2-acrylic acid-2-hydroxyethyl phosphate HMP, 15 parts of butyl acrylate Ester BA and 2 parts of hydroxyethyl methacrylate HEMA were dissolved in 90 parts of toluene, controlled at 95 ° C, under nitrogen protection, 0.5 parts of thermal initiator tert-amyl peroxide 2-ethylhexanoate was added, After 10 hours of polymerization reaction, after the toluene was removed by rotary evaporation, a phosphorus-containing flame-retardant polyorganosilicon acrylate copolymer was obtained. The number-average molecular weight of the phosphorus-containing flame-retardant polyorganosilicon acrylate copolymer was 31000, and its chemical structu...

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Abstract

The invention discloses a flame retardant moisture-curing polyurethane hot melt adhesive with excellent aging resistance, and a preparation method thereof. The hot melt adhesive comprises 1-20 parts of polyether diol, 1-50 parts of flame retardant polyether polyol, 1-40 parts of liquid polyester diol, 1-40 parts of crystalline polyester diol, 1-45 parts of a phosphorus-containing flame retardant polysilicone polyacrylate copolymer, 20-60 parts of isocyanate, 0.01-1 part of a catalyst, 0.1-1 part of an antioxidant and 0.1-2 parts of a silane coupling agent. Poly(methacryloxypropyl mono-terminated dimethylpolysiloxane-random-2-hydroxyethyl methacrylate phosphate-random-butyl acrylate-random-hydroxyethyl methacrylate) is firstly synthesized, and then is added to a polyurethane prepolymer, anda silicone acrylate copolymer segment and a reactive flame retardant are introduced, and a hydroxy-containing acrylic functional monomer makes the phosphorus-containing flame retardant polysilicone polyacrylate copolymer partially participate in the synthesis reaction of the polyurethane prepolymer, so components in the above formula have efficient synergistic effects, and the aging resistance and the flame retardation property 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 flame-retardant moisture-cured polyurethane hot-melt adhesive with excellent aging resistance and a preparation method thereof, which is mainly used in electronics and electric appliances, automobiles, textiles and footwear, and food packaging Industry, wood material processing and furniture industry and other structural bonding fields. 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 f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J175/06C09J175/08C08G18/76C08G18/63C08G18/48C08G18/42C08F283/12C08F220/18C08F230/02
CPCC08F283/124C08G18/4018C08G18/4072C08G18/4202C08G18/4238C08G18/4804C08G18/4825C08G18/4854C08G18/635C08G18/7664C08G2170/20C09J175/04C09J175/06C09J175/08C08F220/1804
Inventor 陈燕舞刘锋彭琦路风辉霍应鹏唐秋实徐健浩何华荣
Owner SHUNDE POLYTECHNIC
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