Preparation method for polysiloxanes-amidopolyether block copolymer
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A technology of siloxane amine-based polyether and block copolymer, applied in textiles, papermaking, fiber processing, etc., can solve the problem of decreased fabric hand, achieve smooth hand, reduce pollution, low color and small effect
Inactive Publication Date: 2011-09-28
HANGZHOU MEIGAO HUAYI CHEM
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Chinese Patent Publication No. CN1919896 discloses a kind of amino-modified polyether silicone oil. The hydrophilicity and emulsification of the amino-modified silicone fabric softener prepared by this method are improved, but the hydrophilic segment is in the side chain of the polymer. , the handle of the treated fabric is greatly reduced
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Embodiment 1
[0041] Preparation of α, ω-hydrogen siloxane intermediates
[0042] Add D 4\579.0g 1,1,3,3-Tetramethyldisiloxane 21.0g, start the stirrer, add 12g of concentrated sulfuric acid, heat up to 50-70°C for 8 hours, slowly add ~22g of baking soda, then add 100g of water, stirred for 15 minutes, poured into a separatory funnel, after standing still, let off the lower aqueous solution, repeated several times until neutral. Then, water and low boilers were distilled off, and the product was a colorless transparent liquid. The measured viscosity is 40-50mPa·S, and the hydrogen content is 0.05%±0.002%.
Embodiment 1-1
[0044] The same device, formula and condition as in Example 1, the catalyst was changed to 12g acid clay, and the acid clay was removed by filtration after the reaction.
Embodiment 2
[0046] Preparation of α, ω-diepoxysiloxane intermediates
[0047] In the same device as in Example 1, add 300.0 g of α, ω-hydrogen siloxane, 20.0 g of allyl glycidyl ether, 5 g of isopropanol, and 190 g of toluene to start stirring, heat up to 75 ° C, add platinum 1, 3-divinyltetramethyldisiloxane chelate toluene solution (Pt content 0.5%) 0.68g, 80 ~ 95 ℃ until 29S i NMR no Si-H detected, then at 120 ℃ and 50mmHg, vacuum distillation Toluene, excess reactants were removed. And determine its epoxy value.
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Abstract
The invention discloses a preparation method for a polysiloxanes-amidopolyether block copolymer, comprising the steps of preparation of an intermediate of alpha, omega-hydrosiloxane, preparation of an intermediate of alpha, omega-polysiloxanes diepoxide, and preparation of the polysiloxanes-amidopolyether block copolymer. The polysiloxanes-amidopolyether block copolymer provided in the invention enables a textile finishing agent to be stable under condition of high temperature, a polyelectrolyte, a high pH value or a high shear force without breaking emulsion, sticking to a roller or a cylinder and producing oil marks, allows textiles finished to be returned for repairing, and is widely used in fields like chemical fiber, natural fiber and blended products thereof, etc.
Description
technical field [0001] The invention discloses the preparation of a linear polyorganosiloxane amino polyether block copolymer, in particular to a smooth, plump, fluffy, small color change, good emulsifying performance and high stability polyorganosiloxane A method for preparing an alkylamino polyether block copolymer. It belongs to the field of chemical technology. Background technique [0002] In recent years, ordinary amino-modified polysiloxane is a hydrophobic compound, which needs to be added with a large amount of emulsifier, and can only be used after a special emulsification process. At the same time, the stability of the emulsion is poor. Sensitive, prone to sticking cylinders, sticking rollers, oil spots, and difficult to repair the treated fabrics; the absorption rate is also low; the hand feels too greasy. The re-modification of aminopolysiloxane with hydrophilic groups such as polyether can make it hydrophilic and improve other properties, but it will pay the ...
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