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Chemical-corrosion-resistant moisture-curable polyurethane hot melt adhesive and preparation method thereof

A polyurethane hot-melt adhesive and moisture curing technology, applied in the field of structural adhesives, can solve problems such as reducing the chemical corrosion resistance of polyurethane hot-melt adhesive coatings, improve chemical corrosion resistance and adhesion, improve Chemical resistance, the effect of solving the lack of chemical resistance

Inactive Publication Date: 2019-03-29
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 chemical corrosion resistance of polyurethane hot melt adhesive coatings

Method used

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  • Chemical-corrosion-resistant moisture-curable polyurethane hot melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] It is a chemical-resistant moisture-curing polyurethane hot-melt adhesive, which is prepared by the following steps:

[0026] Step 1 Synthesis of polysilicone acrylate copolymer

[0027] 9 parts of methacryloxypropyl monoblocked dimethyl polysiloxane MAPDMS, 15 parts of methyl methacrylate MMA, 20 parts of 2-ethylhexyl acrylate EHA and 2 parts of acrylic acid Hydroxyethyl ester HEA is dissolved in 50 parts of toluene, controlled at 80°C, under the protection of nitrogen, add 1.8 parts of thermal initiator tert-amyl peroxide 2-ethylhexanoate, polymerize for 40 hours, and remove toluene by rotary evaporation Finally, polyorganosilicon acrylate copolymer is obtained, the number average molecular weight of polyorganosilicon acrylate copolymer is 18000, and its chemical structure is: poly(methacryloxypropyl monoblocked dimethylpolysiloxane- Atactic - methyl methacrylate - atactic - 2-ethylhexyl acrylate - atactic - hydroxyethyl acrylate) that is P (MAPDMS-r-MMA-r-EHA-r-HEA)...

Embodiment 2

[0031] It is a chemical-resistant moisture-curing polyurethane hot-melt adhesive, which is prepared by the following steps:

[0032] Step 1 Synthesis of polysilicone acrylate copolymer

[0033]15 parts of methacryloxypropyl monoblocked dimethyl polysiloxane MAPDMS, 30 parts of methyl methacrylate MMA, 20 parts of 2-ethylhexyl acrylate EHA and 3 parts of acrylic acid Hydroxyethyl ester HEA was dissolved in 90 parts of toluene, controlled at 90°C, under the protection of nitrogen, 1.5 parts of thermal initiator tert-amyl peroxide 2-ethylhexanoate was added, the polymerization reaction was 30 hours, and the toluene was removed by rotary evaporation Finally, polyorganosilicon acrylate copolymer is obtained, the number average molecular weight of polyorganosilicon acrylate copolymer is 27000, and its chemical structure is: poly(methacryloxypropyl monoblocked dimethylpolysiloxane- Atactic - methyl methacrylate - atactic - 2-ethylhexyl acrylate - atactic - hydroxyethyl acrylate) tha...

Embodiment 3

[0037] It is a chemical-resistant moisture-curing polyurethane hot-melt adhesive, which is prepared by the following steps:

[0038] Step 1 Synthesis of polysilicone acrylate copolymer

[0039] Mix 18 parts of methacryloxypropyl monoblocked dimethyl polysiloxane MAPDMS, 40 parts of methyl methacrylate MMA, 10 parts of 2-ethylhexyl acrylate (EHA) and 4 parts The hydroxyethyl acrylate HEA is dissolved in 90 parts of toluene, controlled at 95 ° C, under the protection of nitrogen, 0.6 parts of thermal initiator tert-amyl peroxide 2-ethylhexanoate is added, the polymerization reaction is 10 hours, and the rotary evaporation After removing toluene, polyorganosilicon acrylate copolymer is obtained, the number average molecular weight of polyorganosilicon acrylate copolymer is 42000, and the chemical structure is: poly(methacryloxypropyl mono-blocked dimethyl polysiloxane -Atactic-Methyl methacrylate-Atactic-Acrylic acid-2-Ethylhexyl-Atactic-Hydroxyethyl acrylate) that is P(MAPDMS-r...

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Abstract

The invention discloses a chemical-corrosion-resistant moisture-curable polyurethane hot melt adhesive and a preparation method thereof. The chemical-corrosion-resistant moisture-curable polyurethanehot melt adhesive is characterized by comprising 1 to 45 parts of polyether diol, 1 to 30 parts of liquid polyester diol, 1 to 30 parts of crystalline polyester diol, 1 to 45 parts of a polyorganosilicone acrylate copolymer, 1 to 40 parts of isocyanate, 0.01 to 1 part of a catalyst, 0.01 to 1 part of an antioxidant and 0.1 to 1 part of a silane coupling agent. According to the invention, poly(methacryloyloxypropyl mono-terminated dimethylpolysiloxane-random-methyl methacrylate-random-acrylic acid-2-ethylhexyl ester-random-hydroxyethyl acrylate is firstly synthesized; an organosilicone acrylatecopolymer chain segment is introduced into a polyurethane prepolymer; a hydroxyl-containing acrylic functional monomer can enable the polyorganosilicone acrylate copolymer to partially participate ina polyurethane prepolymer synthesis reaction; thus, high-efficiency synergistic effect is achieved, and good compatibility is shown; meanwhile, through further adjustment of raw material constitutionand contents, the chemical corrosion resistance of a polyurethane hot melt adhesives is improved.

Description

technical field [0001] The invention belongs to the technical field of structural adhesives, in particular to a chemical-resistant moisture-cured polyurethane hot-melt adhesive and a preparation method thereof, which are mainly used in the electronics and electric appliances industry, automobile industry, textile and shoemaking industry, food packaging industry, Structural bonding fields such as wood material processing and furniture industry. 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 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J175/06C09J175/04C08G18/76C08G18/63C08G18/48C08G18/42C08F283/12C08F220/14C08F220/18
CPCC08F283/124C08G18/4018C08G18/4072C08G18/4202C08G18/4238C08G18/4825C08G18/4854C08G18/635C08G18/7664C08G18/7671C08G2170/20C09J175/04C09J175/06C09J175/08C08F220/1808
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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