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Synthesizing technology of water dispersant type polyaminoester emulsion

A technology of polyurethane emulsion and synthesis process, which is applied in the field of synthesis process of water-dispersed polyurethane emulsion, which can solve the problems of yellowing, tensile strength, stickiness, etc., and achieve the effects of film formation, easy drying, reduced energy consumption, and no special smell

Inactive Publication Date: 2011-06-29
FUJIELE MATERIAL SCI & TECH DEV SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are polyurethane emulsions made of polyether polyols as raw materials, but the products are sticky, yellowish and low in tensile strength after film formation

Method used

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  • Synthesizing technology of water dispersant type polyaminoester emulsion
  • Synthesizing technology of water dispersant type polyaminoester emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 100 parts by weight of polyol, 10 parts by weight of anti-adhesive resin, and 37 parts of polyisocyanate into the reaction kettle, stir evenly and heat up to 75-78°C, continue stirring for 2 hours to form a prepolymer; cool down to 60°C , add the solvent acetone that is 83 parts by weight, make its viscosity reduce;

[0028] Cool down to 25-30°C, add 10 parts by weight of dimethylol propionic acid; raise the temperature to 40-45°C, neutralize to pH 7-8 with 7 parts by weight of triethylamine after 30 minutes;

[0029] Add the deionized water that is 53 parts by weight, emulsify for 1 hour;

[0030] After standing for 12 hours, raise the temperature of the emulsion to 60°C, remove the acetone, add a small amount of RM-2020 leveling agent, DSX2000, such as 815M defoamer to the emulsion, and compound the polyurethane emulsion.

Embodiment 2

[0032] Add 100 parts by weight of polyol, 8 parts by weight of anti-adhesive resin, and 39 parts of polyisocyanate into the reaction kettle, stir evenly and then raise the temperature to 75-78°C, continue stirring for 1.5 hours to form a prepolymer; cool down to 58°C , add the solvent acetone that is 80 parts by weight, make its viscosity reduce;

[0033] Cool down to 25-30°C, add 12 parts by weight of dimethylolpropionic acid; raise the temperature to 40-45°C, neutralize to pH 7-8 with 8 parts by weight of triethylamine after 25 minutes;

[0034] Add the deionized water that is 50 parts by weight, emulsify for 50 minutes;

[0035] After standing for 14 hours, raise the temperature of the emulsion to 60°C, remove the acetone, add a small amount of RM-2020 leveling agent, DSX2000, such as 815M defoamer to the emulsion, and compound the polyurethane emulsion.

Embodiment 3

[0037] Add 100 parts by weight of polyol, 12 parts by weight of anti-adhesive resin, and 35 parts of polyisocyanate into the reaction kettle, stir evenly and then raise the temperature to 75-78°C, continue stirring for 2 hours to form a prepolymer; cool down to 62°C , add the solvent acetone that is 85 parts by weight, make its viscosity reduce;

[0038] Cool down to 25-30°C, add 8 parts by weight of dimethylolpropionic acid; raise the temperature to 40-45°C, neutralize to pH 7-8 with 6 parts by weight of triethylamine after 35 minutes;

[0039] Add the deionized water that is 55 parts by weight, emulsify for 1 hour;

[0040] After standing for 13 hours, raise the temperature of the emulsion to 60°C, remove the acetone, add a small amount of RM-2020 leveling agent, DSX2000, such as 815M defoamer to the emulsion, and compound the polyurethane emulsion.

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Abstract

A process for preparing a dispersed-in-water polyurethane emulsion includes such steps as proportionally adding polyol, detackfying resin and polyisocyanate into reactor, stirring, heating while stirring to generate pre-polymer, cooling, adding acetone, cooling, adding hydrophilic chain extending agent, heating, neutralizing to pH=7-8 by triethane, adding deionized water, emulsifying, laying aside, heating, removing acetone and adding assistant.

Description

technical field [0001] The invention relates to a synthesis process of polyurethane, in particular to a synthesis process of water-dispersed polyurethane emulsion. Background technique [0002] The excellent performance of polyurethane material comes from its special structure. From the configuration and conformation of polyurethane molecules, the polyether, polyester or polyolefin chain segments in polyurethane macromolecules are very flexible and constitute the soft segment of polyurethane, while some short olefins, aromatic groups, carbamate groups or The substituted urea stretches into a rod at room temperature, and is not easy to change the conformation and presents rigidity, which is the hard segment. The soft segment endows the material with good elasticity, lower melting point and glass transition temperature, while the hard segment endows the material with good strength and hardness. It is the alternating connection of these two segments that constitutes the macro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/09C08J3/07C08G18/10
Inventor 余韶真
Owner FUJIELE MATERIAL SCI & TECH DEV SHANGHAI
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