Preparation method of environment-friendly type aqueous polyurethane hot sol for clothing artificial leather
An environment-friendly, water-based polyurethane technology, which is applied in polyurea/polyurethane coatings, polyurea/polyurethane adhesives, adhesives, etc., can solve solvent pollution, few water-based polyurethanes, low adhesion fastness of water-based polyurethanes, etc. question
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Embodiment 1
[0013] Add 80 grams of polypropylene glycol with a molecular weight of 1000 and 36 grams of MDI in the flask, react at 85°C for 1.5 hours, cool down to 70°C, add 6 grams of DMPA, 8.6 grams of 1,4 butanediol, keep stirring for 30 minutes, add dropwise Add 5 drops of dibutyltin dilaurate, add 70 grams of acetone to reduce the viscosity of the system, keep it warm for 4.5 hours, cool down to room temperature, add 4 grams of triethylamine to neutralize, add 510 grams of ionized water, stir, and remove the acetone to obtain The invention discloses an environment-friendly water-based polyurethane thermal sol for clothing artificial leather.
Embodiment 2
[0014] Example 2: Add 117 grams of polyether 220, 40 grams of IPDI, HDI or TDI in the flask, react at 85°C for 1.5 hours, cool down to 75°C, add 6 grams of DMPA, 7.5 grams of 1,4 butanediol, and keep warm Stir for 30 minutes, add 5 drops of dibutyltin dilaurate dropwise, add 80 grams of ethyl acetate to reduce the viscosity of the system, keep it warm for 4.5 hours, cool down to room temperature, add 4 grams of triethylamine for neutralization, add 500 grams of deionized water, and stir , slough the ethyl acetate, promptly obtain the environment-friendly water-based polyurethane hot-sol for clothing artificial leather of the present invention.
Embodiment 3
[0016] Use 50 grams of the above environment-friendly water-based polyurethane hot-sol for clothing artificial leather, scrape it on the PET base cloth, and bond it with PVC on the calender. The obtained composite material has high adhesive strength, and the peel strength of the test can reach 10N / 15mm , and the composite material is soft to the touch.
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