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Polyurethane ionic polymer and preparation method of dispersoid adhesive thereof

An ionic polymer and polyurethane technology, applied in the field of polyurethane, can solve the problems of affecting the storage period, high transportation and storage costs, etc., and achieve the effects of improving production efficiency, stable product storage, and high production efficiency

Inactive Publication Date: 2012-02-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of acetone needs to be used and recovered in the synthesis of Dispercoll-U, the two-phase dispersion system affects the storage period, and the transportation and storage costs are high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] Examples 1-7 are for the preparation of polyurethane ionomers, and Examples 8-14 are for the preparation of polyurethane dispersion adhesives.

[0034] Characterize the basic performance of polyurethane dispersion in the present invention by following test method

[0035] Determination of solid content: use an electronic balance to weigh the mass of the clean watch glass as M1; take 2-3g of the emulsion and put it in the watch glass and call it M2; dry it at 60°C, and weigh the watch glass after 6 hours , continue to put into the oven until the said mass is constant and write down M3. Then the solid content is:

[0036] Peel strength: Apply the polyurethane dispersion adhesive in the present invention evenly on two pieces of PVC (130mm×25mm), and after drying at 70°C for 5 minutes, bond the two pieces of PVC under a pressure ≥ 1.2mpa. The final peel strength was measured after 24 hours.

Embodiment 1

[0038] Add 320g of 1,4-butylene adipate, 8.6g of DMPA, 6.84g of 1,4-butanediol, 58.08g of isophorone diisocyanate (IPDI) and 0.06g dibutyltin dilaurate (DBTDL), stir well to ensure uniform mixing. After stirring and mixing, transfer it to a mold, put it into a vacuum drying oven, and gradually heat up from 110°C to 160°C, take it out after 4-5 hours and naturally cool to room temperature to obtain a polyurethane ionomer, and granulate the ionomer to obtain granular Polyurethane ionomers are convenient for storage and transportation.

Embodiment 2

[0040]Add 320g of 1,4-butylene adipate, 10.72g of DMPA, 4.76g of 1,4-butanediol, 56.44g of isophorone diisocyanate (IPDI) and 0.06g dibutyltin dilaurate (DBTDL), stir well to ensure uniform mixing. After stirring and mixing, transfer it to a mold, put it into a vacuum drying oven, and gradually heat up from 110°C to 160°C, take it out after 4-5 hours and naturally cool to room temperature to obtain a polyurethane ionomer, and granulate the ionomer to obtain granular Polyurethane ionomers are convenient for storage and transportation.

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PUM

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Abstract

The invention discloses a synthetic method of a polyurethane ionic polymer and a preparation method of a polyurethane dispersoid adhesive. The synthetic method of the polyurethane ionic polymer comprises the following step of: synthesizing the polyurethane ionic polymer by performing a double screw reaction extruding or pouring process on polyisocyanate, polylol, a hydrophilic monomer and a chain extender serving as major raw materials. The preparation method of the polyurethane dispersoid adhesive comprises the following steps of: pelletizing the polyurethane ionic polymer to obtain polyurethane ionomer particles; and dissolving (neutralizing) the ionomer particles with acetone, dispersing with water and removing acetone to obtain the polyurethane dispersoid adhesive of which the solid content is 20-65 percent. The polyurethane dispersoid adhesive can be applied in the fields of shoe adhesives, woodworking adhesives, spinning composite adhesives, automobile interior trim adhesives, glass fiber gathering adhesives, electrostatic flocking adhesives and the like.

Description

technical field [0001] The invention relates to the field of polyurethane, in particular to a preparation method of a polyurethane ionomer and a dispersion adhesive thereof. technical background [0002] Polyurethane dispersions are widely used in coatings, adhesives, inks and other fields. It has attracted more and more attention for its excellent application performance. Polyurethane dispersions use water as the dispersion medium, replacing solvent-based polyurethanes, and exhibit outstanding advantages in transportation, environmental protection, and storage. Polyurethane dispersions can be synthesized by methods such as acetone method, prepolymer method, melt dispersion polycondensation method and ketimine / ketazine. The acetone method and prepolymer method have been widely used in the industrial production of polyurethane dispersions. The acetone method uses a large amount of organic solvents and is difficult to reuse, which leads to increased production costs and high...

Claims

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Application Information

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IPC IPC(8): C08G18/65C08G18/66C08G18/42C08G18/44C08G18/48B29C39/44B29C47/92C09J175/04C09J175/06C09J175/08B29C48/92
CPCB29C48/04B29C48/40
Inventor 孙东成贺丽娜
Owner SOUTH CHINA UNIV OF TECH
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