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Hot melt adhesive for synthetic leather surface as well as preparation method and application of hot melt adhesive

A technology of hot melt adhesive and synthetic leather, applied in the direction of adhesive, adhesive type, adhesive additive, etc., can solve the problems of complex synthetic leather process, achieve the effect of convenient construction, high mechanical strength, and reduce the length of the production line

Inactive Publication Date: 2021-03-05
SHANDONG HUACHENG HIGH TECH ADHESIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the complex process of synthetic leather at the present stage, the present invention provides a hot-melt adhesive for synthetic leather surface, adding polyester polyol to ensure the crystallinity of the glue in the later stage, and the joint action of polyether polyol and isocyanate to ensure The softness; the hard segment strength of the entire glue system can be adjusted by the amount of isocyanate added

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of hot melt adhesive for leather surface: 1113g of polyester polyol (polyol with a functionality of 2 and a molecular weight of about 2000 produced by dehydration condensation of ethylene glycol, propylene glycol, and adipic acid), PTMEG1000 669g, PPG1000 447g , pigment (carbon black) 42g, hand feeling agent (Dow Corning Hydroxy Silicone Oil 8427) 51g, add to the reaction kettle at room temperature, heat up to 80°C and start stirring, heat up to 110°C, dehydrate for 1 hour (-0.1MPa vacuum), moisture Lower than 0.1%, lower the temperature to 50°C, add 669 g of isocyanate (pure MDI) and 3 g of antioxidant (2,6-di-tert-butyl-4-methylphenol), react at 76°C for 2 hours, and heat up to At about 85°C, add 6 g of the catalyst (morpholine diethyl ether), stir for 15 minutes, stop stirring, and fill the reaction kettle with nitrogen to exotherm the melt glue barrel (covered with an inner bag of aluminum foil paper) to obtain the product.

[0024] Preparation of synthe...

Embodiment 2

[0026] Preparation of hot melt adhesive for leather surface: 981g of polyester polyol (polyol with a functionality of 2 and a molecular weight of about 2000 formed by the dehydration condensation of ethylene glycol, propylene glycol, and adipic acid) 981g, PTMEG1000 648g, PPG1000 492g, pigment (carbon black) 39g, hand feeling agent (Dow Corning hydroxy silicone oil 8427) 45g, add to the reaction kettle at room temperature, heat up to 80°C and start stirring, heat up to 110°C, dehydrate for 1 hour (-0.1MPa vacuum), Moisture content is lower than 0.1%, lower the temperature to 50°C, add 786 g of isocyanate (pure MDI), 3 g of antioxidant (2,6-di-tert-butyl-4-methylphenol), react at 76°C for 2 hours, and heat up At about 85°C, add 3g of catalyst (morpholine diethyl ether), stir for 15 minutes, stop stirring, and fill the reaction kettle with nitrogen to exothermic melt glue barrel (covered with aluminum foil inner bag) to obtain the product.

[0027] Preparation of synthetic leath...

Embodiment 3

[0029] Preparation of hot melt adhesive for leather surface: prepare 3000g of hot melt adhesive for leather surface, and dehydrate and condense the polyester polyol (ethylene glycol, propylene glycol, adipic acid to form a polyhydric polyol with a functionality of 2 and a molecular weight of about 2000) Alcohol) 1074g, PTMEG1000753g, PPG1000 375g, pigment (carbon black) 42g, hand feeling agent (Dow Corning Hydroxy Silicone Oil 8427) 48g, add to the reaction kettle at room temperature, heat up to 80°C and start stirring, heat up to 110°C, and dehydrate for 1 hour ( -0.1MPa (vacuum degree), moisture content is less than 0.1%, lower the temperature to 50°C, add 699 g of isocyanate (pure MDI), 3 g of antioxidant (2,6-di-tert-butyl-4-methylphenol), and raise the temperature React at 76°C for 2 hours, raise the temperature to about 85°C, add 6g of catalyst (morpholine diethyl ether), stir for 15min, stop stirring, and fill the reaction kettle with nitrogen to exothermic melt glue bar...

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Abstract

The invention belongs to the technical field of chemical synthesis, and particularly relates to a single-component polyurethane hot melt adhesive for a synthetic leather surface as well as a preparation method and application of the single-component polyurethane hot melt adhesive. According to the hot melt adhesive for the synthetic leather surface, polyester polyol is added, the crystallinity ofthe adhesive in the later period is guaranteed, and the softness of the adhesive is guaranteed through the combined action of polyether polyol and isocyanate; the hard segment strength of the whole adhesive system is regulated and controlled through the addition amount of isocyanate. The hot melt adhesive has the characteristics of no toxicity, no pollution, low energy consumption, convenience inconstruction and environmental protection; and the synthetic leather surface is wear-resistant, scratch-resistant, acid-base-resistant, solvent-resistant and high in mechanical strength.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a single-component polyurethane hot-melt adhesive for synthetic leather surface and its preparation method and application. Background technique [0002] my country is the largest producer and consumer of synthetic leather in the world. At present, there are more than 1,000 large-scale artificial leather enterprises in the country, mainly distributed in large and medium-sized coastal cities in the Yangtze River Delta and Pearl River Delta. Artificial leather has become an economic pillar industry in some places. In recent years, with the continuous improvement of people's living standards and environmental protection awareness, consumers' demand for high-performance, high-quality, high-environmental ecological synthetic leather continues to rise. However, at present, domestic synthetic leather is mainly made of solvent-based polyurethane or water-based Pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J11/04C09J11/06C09J11/08C09J7/35C09J7/21C08G18/48C08G18/42C08G18/76
CPCC09J175/04C09J11/04C09J11/06C09J11/08C09J7/21C09J7/35C08G18/4238C08G18/4854C08G18/4825C08G18/7671C08G18/4018C08G18/4804C08G2170/20C09J2400/263C09J2475/00C08L83/04C08K5/13C08K3/04
Inventor 陈丙山王延森陈勇蔡玉
Owner SHANDONG HUACHENG HIGH TECH ADHESIVE
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