Modified polysiloxane softening agent and preparation method thereof
A polysiloxane and softener technology, applied in the field of softeners, can solve the problems of single softness, elasticity, low bulkiness, high yellowing, etc., and achieve the effect of improving taking and excellent hydrophilicity
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Embodiment 1
[0043] A modified polysiloxane softener, the softener has the following structural formula:
[0044]
[0045]
[0046] R 1 =-R 2 -CH-CH 2 O;
[0047] R 2 = phenyl;
[0048]
[0049] R 3 =-CH 2 -CH 2 -CH 2 -NH 2 ;
[0050] R 4 =-CH 3 ;
[0051] The preparation method of above-mentioned modified polysiloxane softening agent, comprises the following steps:
[0052] (1) Mix hydroxyl silicone oils of different molecular weights and N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane at a molar ratio of 1:2, and react at 25°C for 24 hours to obtain silicone An alkane intermediate, the siloxane is hydroxyl-terminated, and its degree of polymerization is 10;
[0053] (2) React the siloxane intermediate obtained in step (1) with a certain amount of A in isopropanol solvent for 2 hours, the whole reaction is carried out under the protection of nitrogen, and finally vacuumize to remove part of the solvent to obtain viscous A transparent modified polysiloxane prod...
Embodiment 2
[0056] A modified polysiloxane softener, the softener has the following structural formula:
[0057]
[0058]
[0059] R 1 =-R 2 -CH-CH 2 O;
[0060] R 2 = methyl;
[0061]
[0062] R3 =-CH 2 -CH 2 -CH 2 -NH-CH 2 -CH 2 -NH 2 ;
[0063] R 4 =-CH 2 -CH 3 ;
[0064] The preparation method of above-mentioned modified polysiloxane softening agent, comprises the following steps:
[0065] (1) Mix hydroxyl silicone oils of different molecular weights and N-(β-aminoethyl)-γ-aminopropyldimethylmethoxysilane at a molar ratio of 1:1, and react at 105°C for 4 hours to obtain silicon oxide An alkane intermediate, the siloxane is hydroxyl-terminated, and its degree of polymerization is 60;
[0066] (2) The siloxane intermediate obtained in step (1) was reacted with a certain amount of A in diethylene glycol monobutyl ether solvent for 10 hours, and the whole reaction was carried out under the protection of nitrogen, and finally vacuumized to remove part solvent to ...
Embodiment 3
[0069] A modified polysiloxane softener, the softener has the following structural formula:
[0070]
[0071]
[0072] R 1 =-R 2 -CH-CH 2 o
[0073] R 2 = saturated alkanes with 1-22 carbon atoms;
[0074]
[0075] R 3 =-CH 2 -CH 2 -CH 2 -NH 2 ;
[0076] R 4 =-CH 3 ;
[0077] The preparation method of above-mentioned modified polysiloxane softening agent, comprises the following steps:
[0078] (1) Mix hydroxyl silicone oils of different molecular weights and N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane at a molar ratio of 1:4, and react at 75°C for 10 hours to obtain silicone An alkane intermediate, the siloxane is hydroxyl-terminated, and its degree of polymerization is 30;
[0079] (2) React the siloxane intermediate obtained in step (1) with a certain amount of A in isopropanol solvent for 5 hours, the whole reaction is carried out under the protection of nitrogen, and finally vacuumize part of the solvent to obtain viscous A transparent mod...
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