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Preparation method of waterborne polyurethane with hyperbranched structure silicone oil side chain

A technology of hyperbranched silicone oil and water-based polyurethane, which is applied in the field of fine chemicals and achieves the effects of easy control of operating conditions, good market prospects, and reduced water absorption

Active Publication Date: 2017-05-10
WACKER DYMATIC SILICONES SHUNDE CO LTD FOSHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the polysiloxane branched chain segment in the polyurethane copolymer is more likely to migrate to the surface layer, effectively improving the hydrophobic performance of the material, however, it still cannot maximize the strong hydrophobic performance

Method used

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  • Preparation method of waterborne polyurethane with hyperbranched structure silicone oil side chain
  • Preparation method of waterborne polyurethane with hyperbranched structure silicone oil side chain
  • Preparation method of waterborne polyurethane with hyperbranched structure silicone oil side chain

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preparation example Construction

[0035] The preparation method of described containing hyperbranched silicone oil side chain modified aqueous polyurethane emulsion, concrete steps are as follows:

[0036] 1) Stir and react 100 parts of polyether polyol, 10-50 parts of hyperbranched silicone oil and 20-80 parts of diisocyanate at 65-100°C for 1-3 hours under catalyst conditions to obtain isocyanate-terminated polyurethane prepolymer;

[0037] in,

[0038]In step (1), the polyether polyol is selected from one or a combination of not less than two of polypropylene glycol or polytetrahydrofuran ether glycol, and has a molecular weight of 300-6000;

[0039] In step (1), the hyperbranched amino silicone oil has a general structural formula as shown in the following formula (I):

[0040]

[0041] Formula (Ⅰ)

[0042] Wherein, in the formula (I), X, Y, and Z are natural numbers of 10 to 100 respectively;

[0043] In step (1), the diisocyanate is selected from isophorone diisocyanate (IPDI), hexamethylene diisoc...

Embodiment 1

[0058] Add 100 g of PPG1000 and 50 g of hyperbranched amino silicone oil (Momentive, SF1921) into a three-necked flask equipped with a thermometer and a reflux condenser. Under stirring conditions, add 36 g of toluene diisocyanate and 0.25 g of dibutyltin dilaurate, Stir and react at 65°C for 3 hours to obtain an isocyanate-terminated polyurethane prepolymer; then, add 5g of trimethylolpropane chain extender and 5g of N-methyldiethanolamine chain extender to the above polyurethane prepolymer, and use acetone Dilute with 50g, stir and react at 45°C for 6 hours, analyze the residual NCO content by the di-n-butylamine method, wait until the calculated value is reached, then cool down to room temperature (below 30°C), then add dimethyl sulfate diluted with 2.8g acetone Esters (5.5g) were quaternized, and the reaction was maintained at room temperature for 1 hour to obtain a quaternized cationic isocyanate-terminated polyurethane prepolymer; the above-mentioned quaternized cationic ...

Embodiment 2

[0061] Add 45 g of PPG300, 55Gppg6000 and 10 g of hyperbranched amino silicone oil (Momentive, SF1708) into a three-necked flask equipped with a thermometer and a reflux condenser. Under stirring conditions, add 80 g of isophorone diisocyanate and dibutyltin dilaurate Ester 1g, stirred and reacted at 100°C for 1 hour to obtain an isocyanate-terminated polyurethane prepolymer; then, add 1g of butanediol chain extender and 20g of N-phenyldiethanolamine chain extender to the above polyurethane prepolymer, Dilute with 20g of propyl acetate, stir and react at 80°C for 2 hours, analyze the residual NCO content by the di-n-butylamine method, wait until the calculated value is reached, then cool down to room temperature (below 30°C), then add 46g of propyl acetate Diluted methyl iodide (23g) was quaternized, and the reaction was kept at room temperature for 3 hours to obtain a quaternized cationic isocyanate-terminated polyurethane prepolymer; the above-mentioned quaternized cationic p...

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Abstract

The invention provides a hyperbranched silicone oil side chain modified waterborne polyurethane polymer and a preparation method thereof. The preparation method of the polymer comprises the following steps: making 100 parts of polyether polyol and 10 parts of hyperbranched amino silicone oil react with 20 to 80 parts of diisocyanate to obtain a polyurethane prepolymer which contains a hyperbranched silicone oil side chain and is blocked by an isocyanate group; adding 2 to 19 parts of small molecular polyol chain extender into the prepolymer and 0.1 to 10 parts of amino-containing small molecular dihydric alcohol for chain extension, and performing quaternization and further emulsification to obtain hyperbranched silicone oil side chain modified polyurethane polymer emulsion. In the hyperbranched silicone oil side chain modified waterborne polyurethane emulsion, a hyperbranched siloxane chain segment is adopted, so that the water contact angle is increased, and the water absorption of polyurethane is lowered; the emulsion can be used as a fluorine-free waterproof agent to be applied to chemical fiber cloth or cotton; the preparation method is simple in process, the reaction speed is moderate and the operating conditions are easy to control; the product belongs to a water-based emulsion, and conforms to the development direction of environmental friendliness.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and in particular relates to a preparation method of water-based polyurethane containing silicone oil side chains with a hyperbranched structure. Background technique [0002] Water-based polyurethane has excellent comprehensive performance and environmental protection, so it is widely used in textile printing and dyeing processing, leather processing, adhesives, furniture paint, electrophoretic paint, electrodeposition paint, architectural paint, paper treatment paint, glass fiber paint, etc. Many areas. But in general, water-based polyurethane still has some shortcomings to overcome, such as poor water resistance caused by molecular chains containing hydrophilic segments or ionic groups in side chains; insufficient heat resistance caused by linear molecules, etc. question. Aiming at these problems, there are different methods to solve them. Organosiloxane modified waterborne polyurethane is one...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/61C08G18/48C08G18/12C08G18/32
CPCC08G18/12C08G18/4009C08G18/4825C08G18/4854C08G18/61C08G18/3206C08G18/3275
Inventor 林伟鸿郭玉良鲍亮
Owner WACKER DYMATIC SILICONES SHUNDE CO LTD FOSHAN
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