Method for preparing solvent-free polyurethane resin adhesive and use thereof

A polyurethane resin, solvent-free technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of limited hydrolysis resistance, poor colorability, poor color fastness, etc., to improve dyeability , The effect of better hydrolysis resistance and better hydrolysis resistance

Inactive Publication Date: 2019-01-22
高鼎精细化工(昆山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when it is desired to introduce dye molecules into the polyurethane resin, even if the dye molecules enter the polyurethane structure, they still cannot be firmly combined with the polyurethane main chain; on the contrary, most dye molecules can only be adsorbed on the polyurethane with weak chemical force. On the pores or on the surface, the content of dye molecules in the polyurethane molecule is very low, so there are defects such as difficult dyeing, poor colorability, poor l

Method used

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  • Method for preparing solvent-free polyurethane resin adhesive and use thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1A

[0098] Combine 50.3 g of polyoxypropylene glycol, 335.26 g of castor oil and its derivative polyol, 540 g of 2,4-diphenylmethane diisocyanate and 4,4-diphenylmethane diisocyanate mixture, and 1010 1.845g of antioxidant , Added to the reaction vessel, heated to 55-65°C with nitrogen and stirred and mixed. Track NCO changes by NCO titrator until the difference between NCO% before and after <0.05, that is, the end of the reaction is reached. When all the polyols and the isocyanate are completely reacted, the reaction product is a modified isocyanate.

example 1B

[0100] Add 240 g of polyethylene adipate diol, 96.3 g of polyoxypropylene glycol, 366 g of hexamethylene diisocyanate, and 1.76 g of antioxidant 1010 to the reaction vessel, and heat to 65-75°C with nitrogen. Stir and mix, track the NCO change with the NCO titrator, until the difference between NCO% before and after <0.05, that is, the end of the reaction is reached. When all the polyols and the isocyanate are completely reacted, the reaction product is a modified isocyanate.

example 2

[0102] Add 440.56 g of polyoxypropylene glycol, 572.72 g of polyhexanediol adipate glycol, 10105.06 g of antioxidants, and 0.15 to 0.25 g of stannous octoate as a catalyst into the reaction vessel, and heat to 45-55°C with nitrogen. Stir and mix. When all the polyols are uniformly mixed, the end of the reaction is reached.

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Abstract

The invention discloses a method for preparing a solvent-free polyurethane resin adhesive and use thereof. The solvent-free polyurethane resin adhesive is obtained by reacting modified isocyanate prepared by ethers or ester polyols and ethers or ester polyols. The solvent-free polyurethane resin adhesive of the invention improves the dyeability by introducing a group which can be combined with a dye in the preparation process, and selects an appropriate ether polyol or a small molecule alcohol substance to enhance the effect of dye penetration; In addition, an organic solvent is not used in the preparation process, and the finished product has no solvent release and no solvent residue, and is environmentally friendly; compared with the solvent-based PU resin, the product has the advantagesof better dyeability, hydrolysis resistance, and the like.

Description

Technical field [0001] The invention relates to a method for preparing a solvent-free polyurethane resin adhesive and its use. Background technique [0002] Velcro tape is a fabric fastener, usually composed of a pair of components, including a hook and loop structure (loop / hook structure), one of which is covered with a loop structure and the other is covered with a hook Shape structure, when the two are pressed together, the loop and the hook are combined to form a temporarily fastened state; the two can be separated by applying external force in the appropriate direction and magnitude. Hook and loop fasteners are used in multiple ways and have high degrees of freedom, and are widely used in outdoor products and daily necessities. [0003] In order to make the surface of the component include loop and hook-like structures, a common way is to join these structures to the textile substrate respectively. Specifically, these structures can be joined to the textile substrate by coati...

Claims

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Application Information

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IPC IPC(8): C09J175/04C09J175/06C09J175/08C09J175/14C08G18/48C08G18/67C08G18/36C08G18/42
CPCC08G18/4018C08G18/4238C08G18/4825C08G18/6696C09J175/04C09J175/06C09J175/08C09J175/14
Inventor 林永欣苏昱良陈俊业廖盈甄康永进
Owner 高鼎精细化工(昆山)有限公司
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