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Special surface treating agent applied to bonding of PUR and Kevlar fibers and preparation method of special surface treating agent

A technology of surface treatment agent and Kevlar fiber, which is applied in the field of special surface treatment agent for PUR and Kevlar fiber bonding and its preparation, can solve the problem of insufficient adhesion between PUR hot melt adhesive and Kevlar fiber cloth substrate and other problems, to achieve the effect of firm bonding, easy operation, and excellent adhesion

Pending Publication Date: 2022-03-15
SHANDONG NORTH MODERN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of insufficient adhesion between PUR hot melt adhesive and Kevlar fiber cloth base material in the prior art, the purpose of the present invention is to provide a special surface treatment agent for bonding PUR and Kevlar fiber and its preparation The method can greatly improve the bonding force between the Kelaf substrate and the PUR hot melt adhesive, and realize the bonding effect of the cohesive failure of the PUR hot melt adhesive when the test piece is tested for peel strength

Method used

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  • Special surface treating agent applied to bonding of PUR and Kevlar fibers and preparation method of special surface treating agent
  • Special surface treating agent applied to bonding of PUR and Kevlar fibers and preparation method of special surface treating agent

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preparation example Construction

[0048] The present invention also includes a preparation method of a special surface treatment agent applied to PUR and Kevlar fiber bonding, comprising the following steps:

[0049] ① In parts by weight, add 6.5-10 parts of polyether polyol into the reaction kettle, heat up to 100-105°C, dehydrate in vacuum for at least half an hour under the condition that the vacuum degree is not lower than 0.092MPa, and cool down to 55-65°C ℃, under stirring, add 9-13 parts of diisocyanate, heat up to 80-85 ℃, react for 3 hours under the protection of nitrogen, take a sample to detect the isocyanate content in the product, when the isocyanate content is 7-12%, Add 15-20 parts of the first solvent, reduce the material to below 40°C, and obtain a mixture, which is set aside;

[0050] The polyether polyol is a trifunctional polyoxypropylene ether with a molecular weight not greater than 1000;

[0051] The diisocyanate is one or both of diphenylmethane diisocyanate, toluene diisocyanate, isop...

Embodiment 1

[0062] A special surface treatment agent for bonding PUR and Kevlar fiber, consisting of the following raw materials: 10kg of trifunctional polyoxypropylene ether with a molecular weight of 1000, 9kg of toluene diisocyanate, 20kg of acetone, and 4.5 kg of anilinomethyltrimethoxysilane kg, 50kg of butyl acetate, 0.05kg of p-toluenesulfonyl isocyanate and 0.2kg of dibutyltin dilaurate.

Embodiment 2

[0064] A special surface treatment agent for the bonding of PUR and Kevlar fiber, consisting of the following raw materials: 6.5kg of trifunctional polyoxypropylene ether with a molecular weight of 500, 13kg of isophorone diisocyanate, 15kg of butyl acetate, N- (n-butyl)-3-aminopropyltrimethoxysilane 7kg, ethyl acetate 60kg, p-toluenesulfonyl isocyanate 0.1kg and triethylenediamine 0.05kg.

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Abstract

The invention discloses a special surface treating agent applied to PUR and Kevlar fiber bonding, and relates to the technical field of surfactants, the special surface treating agent comprises the following raw materials: polyether polyol, diisocyanate, a first solvent, a silane end-capping reagent, a second solvent, a water stabilizer and a catalyst; the water stabilizer is p-toluenesulfonyl isocyanate; according to the special surface treating agent for bonding the PUR and the Kevlar fibers, the small molecular effective components can easily permeate into gaps of fiber cloth, the isocyanate end group and the silane end group can be well bonded with the Kevlar fibers, and firm chemical and physical bonding can be generated after the PUR hot melt adhesive is coated on the surface of the treating agent; the PUR hot melt adhesive is firmly adhered to the surface of the Kevlar fiber cloth, so that the surface treating agent has excellent adhesion with PUR after treating a Kevlar fiber base material, and cohesive failure can be realized in a stripping test.

Description

technical field [0001] The invention relates to the technical field of surfactants, in particular to a surface treatment agent specially used for bonding PUR and Kevlar fibers and a preparation method thereof. Background technique [0002] The main component of reactive polyurethane hot melt adhesive (PUR) is a terminal isocyanate group prepolymer synthesized from polyester polyol, polyether polyol and diisocyanate. As moisture diffuses into the adhesive, it reacts with isocyanate groups to form urea, biuret and allophanate, making the linear prepolymer low molecular weight to form a crosslinked macromolecular structure, thereby obtaining higher mechanical properties. And it has better high temperature resistance, solvent resistance and water resistance than traditional hot melt adhesives. [0003] Reactive polyurethane hot melt adhesive (PUR) can not only glue porous materials, such as ceramics, fabrics, foam, wood, etc., but also glue smooth surface materials such as glas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/80C09J5/02
CPCC08G18/4829C08G18/809C09J5/02
Inventor 张健伟王玉东于伟强陈晓理杜厚俊梁帅王桂芳
Owner SHANDONG NORTH MODERN CHEM IND