A kind of preparation method of modified polyurethane glue
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A polyurethane glue, polyurethane technology, applied in the direction of polyurea/polyurethane adhesives, monocarboxylate copolymer adhesives, adhesives, etc., to achieve the effect of reducing storage and use temperature
Inactive Publication Date: 2011-12-28
上海九元石油化工有限公司
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Abstract
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Problems solved by technology
[0002] Polyurethane adhesives with highly crystalline properties have the advantages of fast drying and good bond strength, but because of the gel problem, it seriously affects the use and storage in winter, especially in severe cold areas. In traditional applications, manufacturers and users have to build insulation Store in the room or use various heating measures before use to restore the performance of the glue
Method used
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Embodiment 1
[0012] First add 40g of acetone, 35g of methyl ethyl ketone, 5g of cyclohexanone and 20g of ethyl acetate and mix thoroughly to form a mixed organic solvent A, then raise the temperature to 35-60°C, and gradually add 12g of grades while stirring at a speed of 600-1000 rpm The mixture B is composed of JY5020 and 10g of JY1036 polyurethane particles. React for 5-10 hours. After the particles are completely dissolved, add 1.5g of brand 4744 antifreeze modifier C, stir and mix for 1 hour, add 1g of brand for Antioxidant D of JY-Stab8733, fully stirred for 30 minutes, cooled the system to room temperature, filtered and packaged to obtain the finished product.
Embodiment 2
[0014] First add a mixed organic solvent A consisting of 55g of acetone, 50g of methyl ethyl ketone, and 5g of toluene, mix thoroughly, then raise the temperature to 35-60°C, stir at a speed of 600-1000 rpm, and gradually add the brands of NY7503 and JY5400 , the mixture B composed of JY2120 polyurethane particles, the weights of the polyurethane particles of the above three grades are 12g, 6g, 5g respectively, react for 5-10h, and add 1g of antifreeze modifier C with the grade T1804 after the particles are completely dissolved , fully stirred and mixed for 1 hour, added 1.2 g of UV-328 ultraviolet absorber D, fully stirred for 40 minutes, lowered the system to room temperature, filtered and packaged to obtain the finished product.
Embodiment 3
[0016] First add 50g of acetone and 50g of methyl ethyl ketone mixed organic solvent A, mix well, then raise the temperature to 35-60°C, stir at 600-1000 rpm, and gradually add 22g of NY5813 polyurethane particles B , react for 5-10 hours, after the particles are completely dissolved, add 1.2g of antifreeze modifier C with the brand name T1808, stir and mix thoroughly for 1 hour, lower the system to room temperature, filter and pack to obtain the finished product.
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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Abstract
The present invention relates to the technical field of polymer materials and chemical industry, specifically a preparation method of modified polyurethane glue, which is characterized in that: organic solvent A is heated up to 35-60°C and stirred at 600-1000 rpm Gradually add polyurethane particles B in an amount of 20-60% of the weight of the organic solvent, and react for 5-10 hours. After the particles are dissolved, add antifreeze modifier C, stir and mix, and add other additives D as needed, and stir and mix thoroughly. The temperature is lowered to 20-35° C., and the finished product is obtained by filtering and packaging. The added amount of the antifreeze modifier accounts for 0.01%-10% of the modified polyurethane glue system of the finished product by weight percentage. Beneficial effects of the present invention: the product can be used at a low temperature of -15°C to 5°C, which reduces the storage and use temperature of crystalline polyurethane glue, and can be widely used in clothing, automobiles and furniture industries, and is the glue of the same kind in severe cold regions Users bring good news.
Description
[technical field] [0001] The invention relates to the technical fields of polymer materials and chemical industry, in particular to a preparation method of modified polyurethane glue. [Background technique] [0002] Polyurethane adhesives with highly crystalline properties have the advantages of fast drying and good bond strength, but because of the gel problem, it seriously affects the use and storage in winter, especially in severe cold areas. In traditional applications, manufacturers and users have to build insulation Store in the room or use various heating measures before use to restore the performance of the glue. [Content of the invention] [0003] The purpose of the present invention is to enable the polyurethane glue with a highly crystalline structure to be stored and used at -15°C. [0004] In order to achieve the above purpose, a preparation method of modified polyurethane glue is designed, the composition of which is: organic solvent A, the temperature is ra...
Claims
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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Application Information
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