Polylactic acid polyurethane material and preparation method thereof

[0031] Example 1

[0032] (1) 50 parts of polyether polyol DX-1 (functionality 2, molecular weight 1,000) and 50 parts of polyether polyol DX-2 (functionality 3, molecular weight 2,000) are poured into a three-necked flask, heated to 110℃ under the protection of nitrogen, dehydrated until the water content is less than 0.02%, cooled to 80℃, and 38 parts of TDI are dripped under the protection of nitrogen, and stirred for reaction for 2 hours.

[0033] (2) 20 parts of 20-mesh polylactic acid, 25 parts of 1,4- butanediol and 10 parts of vinyl triethoxysilane are stirred and mixed uniformly at 50℃ to obtain component B..

[0034] (3) Mix component A and component B according to the mass ratio of 3:1, and stir under the protection of nitrogen at 120℃ for 3h to obtain the product.

[0039] Example 2

[0040] (1) 150 parts of polyether polyol DX-1 (functionality 2, molecular weight 6,000) and 50 parts of polyether polyol DX-2 (functionality 3, molecular weight 8,000) are poured into a three-necked flask, heated to 110℃ under the protection of nitrogen, dehydrated until the water content is less than 0.02%, cooled to 90℃, and 30 parts of TDI are dripped under the protection of nitrogen, and stirred for reaction for 2 hours.

[0041] (2) 50 parts of 80-mesh polylactic acid, 55 parts of trimethylolpropane and 15 parts of vinyl trimethoxysilane are stirred and mixed uniformly at 50℃ to obtain component B..

[0042] (3) Mix component A and component B according to the mass ratio of 2:1, and stir under the protection of nitrogen at 140℃ for 4h to obtain the product.

[0047] Example 3

[0048] (1) 200 parts of polyether polyol DX-1 (functionality 2, molecular weight 10,000) and 100 parts of polyether polyol DX-2 (functionality 3, molecular weight 5,000) are poured into a three-necked flask, heated to 110℃ under nitrogen protection, dehydrated until the moisture content is less than 0.02%, cooled to 100℃, and 42 parts of TDI are dripped under nitrogen protection.

[0049] (2) Take 100 parts of 100-mesh polylactic acid, 25 parts of triethanolamine and 35 parts of vinyl tri (β-methoxyethoxy) silane, stir and mix them evenly at 50℃ to obtain component B.

[0050] (3) Mix component A and component B according to the mass ratio of 3:1, and stir under the protection of nitrogen at 160℃ for 5h to obtain the product.