Novel polyurethane hot-melt adhesive paint and preparation method thereof

A technology of polyurethane hot melt adhesive and polyurethane prepolymer, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of low production efficiency, long time consumption, uneven product quality, etc., and achieve improved production efficiency and excellent Flexibility and easy operation

Active Publication Date: 2013-04-03
嘉兴市恒泰化工科技有限公司
3 Cites 11 Cited by

AI-Extracted Technical Summary

Problems solved by technology

Wood lacquer is a field with a large amount of paint application. As far as our country is concerned, wood lacquer products are exquisite, and the product quality is uneven. The construction process relies more on manual work, and the stability of spraying quality is poor.
At the same time, due to the low toughness and brittleness of traditional paints, in most cases, the process...
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Abstract

The invention discloses a polyurethane hot-melt adhesive paint. The polyurethane hot-melt adhesive paint comprises at least one polyurethane prepolymer which is prepared by the reaction between a polyalcohol component and isocyanate. The preparation method comprises the following steps in sequence: feeding three polyester polyols, antioxidant and ultravioresistant agent into a reacting kettle based on the ratio; reacting; adding diisocyanate until the reaction is ended; and then adding chain extender and catalyst to react to obtain the polyurethane hot-melt adhesive paint. The polyurethane hot-melt adhesive paint is simple in preparation process, fast in surface drying speed, excellent in transparency, high in resistance to heat and UV (Ultraviolet), and excellent in environmental friendliness.

Application Domain

Polyurea/polyurethane coatings

Technology Topic

PrepolymerIsocyanate +6

Examples

  • Experimental program(5)

Example Embodiment

[0017] The preparation method of the present invention is as follows: put three polyester polyols in proportion, antioxidants and anti-ultraviolet agents in a reaction kettle, heat to 120°C, and vacuum dehydrate for 2 hours under stirring; then cool down to 80-85°C , add diisocyanate; then raise the temperature of the reactant, and stir slowly, when the temperature rises to 85-90°C, start timing, keep it warm for 45-60 minutes, and stir at a constant speed until the end of the reaction is reached, and then add chain extender Continue to react with the agent for 1 hour, raise the temperature to 100°C, add the catalyst, stir evenly and then discharge, which is transparent polyurethane hot melt adhesive paint.
[0018] The preparation method is as follows.

Example Embodiment

[0019] Embodiment one:
[0020] Add 200g of crystalline polyester polyol, 350g of amorphous polyester polyol, 300g of liquid polyester polyol, 0.5g of antioxidant Irganox1010, and 0.5g of UV327 into the reactor, heat to 120°C, and vacuum dehydrate under stirring for 2 Hour. Then the temperature was lowered to 80-85° C., and 150 g of diphenylmethane diisocyanate was added. Then raise the temperature of the reactant and stir slowly. When the temperature rises to 85-90°C, start timing and keep it warm for 45-60 minutes while stirring at a constant speed until the end of the reaction is reached. Then, add 20g of 1,4-BDO to continue React for 1 hour, heat up to 100°C, add 1.0g of DBTDL (dibutyltin dilaurate), stir evenly, and discharge.

Example Embodiment

[0021] Embodiment two:
[0022] Add 250g of crystalline polyester polyol, 300g of amorphous polyester polyol, 270g of liquid polyester polyol, 1.0g of Irganox1010, and 1.0g of UV327 into the reactor, heat to 120°C, and vacuum dehydrate for 2 hours under stirring. Then the temperature was lowered to 80-85° C., and 180 g of diphenylmethane diisocyanate was added. Then the reactant is heated up and stirred slowly. When the temperature rises to 85-90°C, start timing and keep it warm for 45-60 minutes while stirring at a constant speed until the end of the reaction is reached. Then, add 10g TMP (trimethylol Propane) continued to react for 1 hour, heated up to 100°C, added 0.5g stannous octoate, stirred evenly, and discharged.
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Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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