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Water-based polyurethane emulsion for heat-resistant transfer coating and preparation method thereof

A technology of water-based polyurethane and transfer coating, which is applied in the field of coatings, can solve the problems of poor temperature resistance and peeling property, and achieve the effects of good production quality, easy control of reaction and excellent performance

Active Publication Date: 2019-09-06
广东博海化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water-based transfer coating with water-based acrylic emulsion as the linking material has good printability and good temperature resistance, but the stripping property is not good; the water-based transfer coating with water-based polyurethane as the linking material has good stripping property and poor temperature resistance

Method used

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  • Water-based polyurethane emulsion for heat-resistant transfer coating and preparation method thereof
  • Water-based polyurethane emulsion for heat-resistant transfer coating and preparation method thereof
  • Water-based polyurethane emulsion for heat-resistant transfer coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A water-based polyurethane emulsion for heat-resistant transfer coatings, comprising the following components by weight:

[0036]

[0037] The preparation method of the water-based polyurethane emulsion of the temperature-resistant transfer coating of embodiment 1 may further comprise the steps:

[0038] 1) Under the protection of dry nitrogen, dehydrate and vacuum polycarbonate diol (PCDL) at 110°C for 1 hour, and cool down to 60°C;

[0039] 2) Add H12MDI, heat up to 88°C from exotherm, react for 2 hours, then cool down to 54°C;

[0040] 3) Mix dimethylolpropionic acid (DMPA), TMP, CHDM, BEPD cross-linking agent and NMP, then add, the temperature should not rise too fast, react at 75°C for 1 hour;

[0041] 4) Add the catalyst and react at 65°C for 2 hours;

[0042] 5), while cooling down, add acetone and cool down to 35°C;

[0043] 6) Discharge the prepolymer into the dispersion bucket, quickly add DMEA, and disperse at high speed for 1 minute;

[0044] 7) Quick...

Embodiment 2

[0047] A water-based polyurethane emulsion for heat-resistant transfer coatings, comprising the following components by weight:

[0048]

[0049] The preparation method of the water-based polyurethane emulsion of the temperature-resistant transfer coating of embodiment 2 may further comprise the steps:

[0050] 1) Under the protection of dry nitrogen, dehydrate polycarbonate diol (PCDL) at 105°C for 1 hour and then cool it down to 55°C;

[0051] 2) Add H12MDI, heat up to 86°C from exotherm, react for 2 hours, then cool down to 53°C;

[0052] 3) Mix dimethylolpropionic acid (DMPA), TMP, CHDM, BEPD cross-linking agent and NMP, then add, the temperature should not rise too fast, react at 72°C for 1 hour;

[0053] 4), add the catalyst, react at 63°C for 2 hours,

[0054] 5), while cooling down, add acetone and cool down to 33°C;

[0055] 6) Discharge the prepolymer into the dispersion barrel, quickly add DMEA aqueous solution, and disperse at high speed for 1 minute;

[005...

Embodiment 3

[0059] A water-based polyurethane emulsion for heat-resistant transfer coatings, comprising the following components by weight:

[0060]

[0061]

[0062] The preparation method of the water-based polyurethane emulsion of the temperature-resistant transfer coating of embodiment 3 may further comprise the steps:

[0063] 1) Under the protection of dry nitrogen, dehydrate and vacuum neopentyl glycol adipate (PNA) at 108°C for 1 hour, and cool down to 55°C;

[0064] 2) Add H12MDI, heat up to 85°C from exotherm, react for 2 hours, then cool down to 52°C;

[0065] 3) Mix dimethylolpropionic acid (DMPA), TMP, CHDM and BEPD cross-linking agent and NMP, then add, the temperature should not rise too fast, react at 72°C for 1 hour;

[0066] 4) Add the catalyst and react at 62°C for 2 hours;

[0067] 5), while cooling down, add acetone and cool down to 32°C;

[0068] 6) Discharge the prepolymer into the dispersion bucket, quickly add DMEA aqueous solution, and disperse at high s...

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Abstract

The invention discloses a water-based polyurethane emulsion for heat-resistant transfer coatings and a preparation method thereof. The key points of the technical scheme are: the material composition comprising the following components by weight: 6-14% of oligomer polyol, 10-14.2% of diisocyanate , hydrophilic chain extender 1.2-1.6%, cross-linking agent 1.5-3%, acetone 16-18%, NMP 2-4%, amine chain extender 4.0-4.5%, catalyst 0.006-0.010%, ice pure water 43.69- 51.49%, neutralizer 0.8-1.2%. The present invention uses the main raw materials such as oligomer polyol, diisocyanate, hydrophilic chain extender, crosslinking agent and amine chain extender, and uses the two-step method of prepolymer method without increasing the cost of raw materials. A water-based polyurethane emulsion for a temperature-resistant transfer coating with good transferability and good temperature resistance is provided.

Description

[0001] 【Technical field】 [0002] The invention relates to a water-based polyurethane emulsion for a temperature-resistant transfer coating and a preparation method thereof, belonging to the technical field of coatings. [0003] 【Background technique】 [0004] By coating a layer of solvent-based transfer coating on PET, then aluminized, and then transferred to paper through water-based wet compound glue, this used to be a huge reform in the cigarette pack industry, because it is more efficient than directly aluminized on PET. Environmentally friendly and easier to degrade. However, in recent years, due to the increasingly stringent domestic environmental protection regulations, solvent-based transfer coatings are more and more restricted due to large VOC emissions, strong odor, and inflammability and explosion. Therefore, the trend of requiring water-based is becoming more and more obvious, but at present, two kinds of water-based products are mainly used to replace solvent-ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/44C08G18/34C08G18/32C08G18/66C08G18/12C09D175/06
CPCC08G18/10C08G18/4238C08G18/44C08G18/4854C08G18/755C08G18/758C09D5/18C09D175/06C09D175/08C08G18/348C08G18/3212C08G18/3206C08G18/2865
Inventor 褚波
Owner 广东博海化工科技有限公司
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