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Bonding adhesive for leather, preparation method thereof and application of bonding adhesive in leather making process

An adhesive and leather technology, applied in the direction of adhesive types, ester copolymer adhesives, nitrile copolymer adhesives, etc., can solve the problems of poor adhesion, high oil slick, low mechanical strength, etc.

Inactive Publication Date: 2012-01-18
FUJIAN POLYTECH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because silicone has the advantages of good low temperature flexibility, low surface tension, and good biocompatibility, but has the disadvantages of difficult emulsification, more oil slicks, low mechanical strength, and poor adhesion.

Method used

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  • Bonding adhesive for leather, preparation method thereof and application of bonding adhesive in leather making process
  • Bonding adhesive for leather, preparation method thereof and application of bonding adhesive in leather making process
  • Bonding adhesive for leather, preparation method thereof and application of bonding adhesive in leather making process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The first step: the preparation of hydrogen-containing silicone oil n-butyl acrylate composite monomer,

[0049]In a four-necked flask equipped with electric stirring and reflux condenser, add a small amount of toluene, 12 parts of methyl hydrogen-containing silicone oil and a small amount of palladium carbon particles, pass nitrogen gas for 10 minutes, start heating and stirring, raise the temperature to 130°C, and start adding dropwise Add 300 parts of n-butyl acrylate dropwise in about 1 hour, and react at constant temperature for 10 hours. After the reaction stopped, the residual n-butyl ester was recovered by distillation under reduced pressure, cooled, and packaged for use.

[0050] The second step: polymerization of quaternary copolymerization hydrogen-containing silicone oil acrylate

[0051] Mix 22 parts of hydrogen-containing silicone oil n-butyl acrylate (NBMA-SiH), 18 parts of methyl methacrylate (MMA), 6 parts of methacrylic acid (MAA), 8 parts of N-methyl...

Embodiment 2

[0056] Example 1

[0057] The first step: the preparation of hydrogen-containing silicone oil n-butyl methacrylate composite monomer,

[0058] In a four-neck flask equipped with electric stirring and reflux condenser, add a small amount of ethanol, 15 parts of methyl hydrogen-containing silicone oil and a small amount of palladium carbon particles, pass nitrogen gas for 10 minutes, start heating and stirring, raise the temperature to 130°C, and start adding dropwise Add 400 parts of n-butyl methacrylate dropwise in about 1 hour, and react at constant temperature for 10 hours. After the reaction stopped, the residual n-butyl ester was recovered by distillation under reduced pressure, cooled, and packaged for use.

[0059] The second step: polymerization of quaternary copolymerization hydrogen-containing silicone oil acrylate

[0060] 28 parts of hydrogen-containing silicone oil n-butyl methacrylate (NBMA-SiH), 28 parts of methyl methacrylate (MMA), 6 parts of methacrylic acid...

Embodiment 3

[0065] The application of adhesive for leather of the present invention in the tanning process, its formula is:

[0066] 1. 18 parts of tap water

[0067] 2. Wetting agent 0.22 parts

[0068] 3. 0.22 parts of defoamer

[0069] 4. Hydrogen-containing silicone oil acrylate emulsion 75 parts

[0070] 5. Filler (CaCO3) 22 parts

[0071] Put the above materials into the dispersing tank one by one, start the dispersing machine at 500-1000r / min, disperse at high speed for 1 hour, filter and pack to get the finished product, sizing at 100-130g / Y, used for laminating the backing cloth of PVC artificial leather.

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Abstract

The invention discloses a leather bonding adhesive, a preparation method thereof and application of the bonding adhesive in the leather making process. By adopting a molecule design method, the invention grafts (methyl) n-butyl acrylate with a flexible molecular chain and a polar group to silicone oil, introduces a polar functional monomer to a silicone oil molecular chain so as to obtain a modified compound monomer, a side chain of which is provided with carboxyl, and improve the adhesive force of the silicone oil on materials; meanwhile, the oil slick phenomenon which is common in silicon-acrylic emulsion is avoided, the problem that silicone oil slicks out of common silicon-acrylic emulsion to influence the bonding strength is solved, the internal plasticization is carried out successfully, the vitrification temperature is reduced and the low-temperature flexibility of an adhesive film is increased. Meanwhile, through block copolymerization of Acrylonitrile, the invention overcomesthe defects of no oil resistance and no high temperature resistance of the conventional silicon-acrylic emulsion. Through adjusting the ratio of a soft monomer to a hard monomer and the consumption and the mode of an emulsifying agent, the invention ensures that the composite indicator reaches the optimal value, which cannot be achieved by the common silicon-acrylic emulsion.

Description

technical field [0001] The invention relates to the field of an adhesive, in particular to an adhesive for leather, a preparation method thereof and an application in a leather-making process. Background technique [0002] Traditional artificial leather and synthetic leather backing fabrics usually use solvent-based polyurethane adhesives. However, due to the release of a large amount of organic solvents during use, they are gradually becoming obsolete due to environmental laws and regulations. Although the recently developed water-based polyurethane adhesives meet the requirements of environmental protection, they also have many deficiencies such as being expensive, not resistant to water and solvents, and the like. [0003] Therefore, the relatively moderate price of acrylate emulsion has attracted extensive attention of researchers. However, its hot stickiness, cold brittleness and oil resistance limit its further application range. In view of the hot-viscous and cold-b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/14C09J133/12C09J133/24C09J133/20
Inventor 张启彦
Owner FUJIAN POLYTECH TECH CO LTD
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