A kind of preparation method and product thereof of water-based polyurethane textile finishing agent doped in situ with nano-silver

Abstract

The invention relates to a preparation method of a nano-silver in situ doped waterborne polyurethane textile finishing agent and a product thereof. The preparation method comprises the following steps: preparing raw materials: a polymeric monomer, silver nitrate and ethylene glycol, wherein the polymeric monomer is prepared from diisocyanate, polyester glycol, polyether diol, a non-ionic chain extender, a cationic chain extender and a quaternization reagent; preparing polyurethane dispersion; performing nano-silver in situ doping and compounding; obtaining the nano-silver in situ doped waterborne polyurethane textile finishing agent. The finishing agent selects quaternization cationic hydrophilic polyurethane as a dispersion medium of nano-silver and is used for textile products such as synthetic fibers, recycled fibers, protein fibers and cellulose fibers; the finishing agent has the advantages of having a certain anti-pilling function on needle textiles while endowing the textile with hydrophilic, anti-static and antibacterial effects; a product is safe and environmentally friendly and is convenient to use.

Description

technical field

[0001] The present invention relates to the hydrophilic, antibacterial and antistatic finishing of various synthetic fibers, regenerated fibers, protein fibers, cellulose fibers and other textile products, in particular to a preparation method of a water-based polyurethane textile finishing agent doped with nano-silver in situ and its products. Background technique

[0002] As an antibacterial agent, nano silver will not produce drug resistance, and the antibacterial effect is stable. The study found that the antibacterial and bactericidal properties of nano-silver are not only related to its own physical and chemical properties, but also affected by its dispersion medium. At present, the liquid-phase chemical reduction method is the most widely used nano-silver preparation method, which generally requires the dispersion of polyethylene glycol or polyvinylpyrrolidone to prevent the agglomeration of nano-silver particles. Specifically, ethylene glycol, hydra...

Examples

Embodiment 1

[0054] Embodiment 1 The preparation method of the water-based polyurethane textile finishing agent doped in situ with nano-silver of the present invention

[0055] The concrete steps of this preparation method:

[0056] (1) The step of polyurethane dispersion preparation, this step reacts polyester diol, polyether diol and diisocyanate, nonionic chain extender, cationic chain extender, quaternizing agent, stannous octoate, and then Glycol is dispersion medium, makes polyurethane dispersion liquid; Specifically:

[0057] (1.1) drop into polyester diol, the polyether diol of total amount 70%, the nonionic chain extender of total amount 60% in reactor;

[0058] (1.2) Heat up to 75°C, add diisocyanate and react under stirring for 30min;

[0059] (1.3) Add stannous octoate, heat up to 85-90°C and react for 120min under stirring;

[0060] (1.4) Cool down to 45°C, add the cationic chain extender dropwise evenly within 15 minutes, control the temperature at 50-55°C after the droppi...

Embodiment 2

[0070] Embodiment 2 The preparation method of the water-based polyurethane textile finishing agent doped with nano-silver in situ of the present invention

[0071] The concrete steps of this preparation method:

[0072] (1) The step of polyurethane dispersion preparation, this step reacts polyester diol, polyether diol and diisocyanate, nonionic chain extender, cationic chain extender, quaternizing agent, stannous octoate, and then Glycol is dispersion medium, makes polyurethane dispersion liquid; Specifically:

[0073] (1.1) drop into polyester diol, the polyether diol of total amount 75%, the nonionic chain extender of total amount 60% in reactor;

[0074] (1.2) Heat up to 70°C, add diisocyanate and react for 40min under stirring;

[0075] (1.3) Add stannous octoate, heat up to 80-85°C and react for 100min under stirring;

[0076] (1.4) Cool down to 45°C, add cationic chain extender evenly dropwise within 10 minutes, control the temperature at 55±5°C and react under stirr...

Embodiment 3

[0086] Embodiment 3 The preparation method of the water-based polyurethane textile finishing agent doped in situ with nano-silver of the present invention

[0087] The concrete steps of this preparation method:

[0088] (1) The step of polyurethane dispersion preparation, this step reacts polyester diol, polyether diol and diisocyanate, nonionic chain extender, cationic chain extender, quaternizing agent, stannous octoate, and then Glycol is dispersion medium, makes polyurethane dispersion liquid; Specifically:

[0089](1.1) drop into polyester diol, the polyether diol of total amount 65%, the nonionic chain extender of total amount 50% in reactor;

[0090] (1.2) Heat up to 70°C, add diisocyanate and react for 40min under stirring;

[0091] (1.3) Add stannous octoate, heat up to 80-85°C and react for 150min under stirring;

[0092] (1.4) Cool down to 50°C, add cationic chain extender evenly dropwise within 15 minutes, control the temperature at 55±5°C after dropping, and re...

technical field

[0001] The present invention relates to the hydrophilic, antibacterial and antistatic finishing of various synthetic fibers, regenerated fibers, protein fibers, cellulose fibers and other textile products, in particular to a preparation method of a water-based polyurethane textile finishing agent doped with nano-silver in situ and its products. Background technique

[0002] As an antibacterial agent, nano silver will not produce drug resistance, and the antibacterial effect is stable. The study found that the antibacterial and bactericidal properties of nano-silver are not only related to its own physical and chemical properties, but also affected by its dispersion medium. At present, the liquid-phase chemical reduction method is the most widely used nano-silver preparation method, which generally requires the dispersion of polyethylene glycol or polyvinylpyrrolidone to prevent the agglomeration of nano-silver particles. Specifically, ethylene glycol, hydra...

Examples

Embodiment 1

[0054] Embodiment 1 The preparation method of the water-based polyurethane textile finishing agent doped in situ with nano-silver of the present invention

[0055] The concrete steps of this preparation method:

[0056] (1) The step of polyurethane dispersion preparation, this step reacts polyester diol, polyether diol and diisocyanate, nonionic chain extender, cationic chain extender, quaternizing agent, stannous octoate, and then Glycol is dispersion medium, makes polyurethane dispersion liquid; Specifically:

[0057] (1.1) drop into polyester diol, the polyether diol of total amount 70%, the nonionic chain extender of total amount 60% in reactor;

[0058] (1.2) Heat up to 75°C, add diisocyanate and react under stirring for 30min;

[0059] (1.3) Add stannous octoate, heat up to 85-90°C and react for 120min under stirring;

[0060] (1.4) Cool down to 45°C, add the cationic chain extender dropwise evenly within 15 minutes, control the temperature at 50-55°C after the droppi...

Embodiment 2

[0070] Embodiment 2 The preparation method of the water-based polyurethane textile finishing agent doped with nano-silver in situ of the present invention

[0071] The concrete steps of this preparation method:

[0072] (1) The step of polyurethane dispersion preparation, this step reacts polyester diol, polyether diol and diisocyanate, nonionic chain extender, cationic chain extender, quaternizing agent, stannous octoate, and then Glycol is dispersion medium, makes polyurethane dispersion liquid; Specifically:

[0073] (1.1) drop into polyester diol, the polyether diol of total amount 75%, the nonionic chain extender of total amount 60% in reactor;

[0074] (1.2) Heat up to 70°C, add diisocyanate and react for 40min under stirring;

[0075] (1.3) Add stannous octoate, heat up to 80-85°C and react for 100min under stirring;

[0076] (1.4) Cool down to 45°C, add cationic chain extender evenly dropwise within 10 minutes, control the temperature at 55±5°C and react under stirr...

Embodiment 3

[0086] Embodiment 3 The preparation method of the water-based polyurethane textile finishing agent doped in situ with nano-silver of the present invention

[0087] The concrete steps of this preparation method:

[0088] (1) The step of polyurethane dispersion preparation, this step reacts polyester diol, polyether diol and diisocyanate, nonionic chain extender, cationic chain extender, quaternizing agent, stannous octoate, and then Glycol is dispersion medium, makes polyurethane dispersion liquid; Specifically:

[0089](1.1) drop into polyester diol, the polyether diol of total amount 65%, the nonionic chain extender of total amount 50% in reactor;

[0090] (1.2) Heat up to 70°C, add diisocyanate and react for 40min under stirring;

[0091] (1.3) Add stannous octoate, heat up to 80-85°C and react for 150min under stirring;

[0092] (1.4) Cool down to 50°C, add cationic chain extender evenly dropwise within 15 minutes, control the temperature at 55±5°C after dropping, and re...

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