Synthesis method of silicone fluoride-free water-proofing agent modified with polyurethane and acrylic acid and water-proofing agent
A technology of polyurethane acrylic and fluorine-free water repellent, which is applied in the direction of improved hand-feeling fibers, liquid-repelling fibers, textiles and papermaking, etc. It can solve problems such as hardening and inconspicuous improvement in durability, and achieve selectivity improvement, Excellent waterproof effect, good hand feeling effect
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[0034] Example 1
[0035] Synthesis of single-end aminoalkyl silicone: (1) 6.41 parts (parts by mass, the same below) n-butyl lithium and 70 parts of toluene were mixed into a solution; 289.2 parts of hexamethylcyclotrisiloxane were added and dissolved in equal mass of toluene Then, add 290 parts of tetrahydrofuran and react at 30°C for 6 hours; add 10 parts of dimethyl monochlorosilane and react at 30°C for 1 hour; filter and remove low boilers under reduced pressure to obtain Hydrogen-terminated polydimethylsiloxane, yield 98%; (2) 500 parts of toluene, 9.2 parts of allyl chloride, 0.01 part of chloroplatinic acid in isopropanol solution (chloroplatinic acid concentration 2%), heating up 100 ℃, add 300.8 parts of single-end hydrogen polydimethylsiloxane dropwise; react at 100℃ for 8h after adding; remove low boilers and unreacted materials under reduced pressure to obtain chloropropyl-terminated polysiloxane with a yield of 96% (3) 308.6 parts of chloropropyl-terminated polysi...
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[0040] Example 2 and Example 3 both make fine adjustments to the formula or process on the basis of Example 1. The following lists the differences between the two examples and Example 1 in the form of an attached table:
[0041]
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