CN114634625B - Self-emulsifying polyether modified organosilicon crease-resistant finishing agent and preparation method and application thereof - Google Patents
Self-emulsifying polyether modified organosilicon crease-resistant finishing agent and preparation method and application thereof Download PDFInfo
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/42—Block-or graft-polymers containing polysiloxane sequences
- C08G77/46—Block-or graft-polymers containing polysiloxane sequences containing polyether sequences
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- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
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- D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
- D06M2200/20—Treatment influencing the crease behaviour, the wrinkle resistance, the crease recovery or the ironing ease
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Abstract
The invention discloses a self-emulsifying polyether modified organosilicon crease-resistant finishing agent and a preparation method thereof, wherein the self-emulsifying polyether modified organosilicon crease-resistant finishing agent has the following structural general formula:the invention also provides application of the self-emulsifying organosilicon anti-wrinkle finishing agent: for finishing fabrics; the fabric is immersed in a solution containing the crease-resistant finishing agent, padded for two or more times and dried.
Description
Technical Field
The invention belongs to the field of textile printing and dyeing, and relates to a self-emulsifying organosilicon anti-wrinkle finishing agent and a preparation method thereof, and an anti-wrinkle finishing application of the self-emulsifying organosilicon anti-wrinkle finishing agent on silk fabrics.
Background
Silk fabrics have excellent characteristics and are popular with consumers, but are easy to crease in the taking process, and the wearing performance is affected, so that crease-resistant finishing is required for the silk fabrics.
In the early days, anti-wrinkle agents represented by N-methylolamide resins were studied extensively, but in the study, it was found that the finished fabrics released free formaldehyde and had some harm to the human body, and thus researchers have focused on shifting the research to the development of formaldehyde-free finishing agents. The prior formaldehyde-free crease-resistant finishing agents are various, and citric acid crease-resistant finishing agents (Yang Y, li S.silk Fabric Non-formaldehyde Crease-resistant Finishing Using Citric Acid [ J ]. Journal of the Textile Institute,2016,84 (4): 638-644) researched by Yang and the like are used for improving crease recovery angles of silk fabrics, but the finished fabrics have yellowing phenomenon, the stiffness is improved, and the original softness of the silk fabrics is lost. The modified organosilicon anti-wrinkle agent has good anti-wrinkle performance and can keep the original softness of the fabric, the modified organosilicon anti-wrinkle agent (Zhang L, tian L, wu M.preparation of Isocyanate Terminated Polysiloxane and Its Application in Crease Resistant Finishing of Silk Fabric [ J ] Fibers and Polymers,2020,21 (2): 300-307) prepared by Zhang L, wu M.preparation of Isocyanate Terminated Polysiloxane and Its Application in Crease Resistant Finishing of Silk Fabric [ J ] Fibers and Polymers,2020,21 ] has good improvement on the crease recovery and can keep the original whiteness and softness, but the prepared finishing agent needs to be emulsified by a large amount of emulsifying agent to be used for anti-wrinkle finishing of the fabric, the consumption is large and the hydrophilicity of the finished fabric is reduced; the crease-resistant finishing agent prepared in the Chinese patent CN201010550995.0 improves the crease recovery angle of the finished fabric and has no great damage to breaking strength retention rate, but the prepared finishing agent has complex process, and a large amount of emulsifying agent (8-15% by weight) is needed to emulsify the finishing agent and is used for crease-resistant finishing of the fabric, so that the industrial cost and energy consumption are increased, and meanwhile, certain pollution is caused to the environment.
The invention 2021112191832 of organosilicon anti-wrinkle finishing agent containing multiple active groups, and a preparation method and application thereof can improve the anti-wrinkle performance of fabrics; meanwhile, the organic silicon can keep the original softness of the fabric. However, the use of the finishing agent can also increase the commercial cost by adding an additional emulsifier during the application process.
Disclosure of Invention
The invention aims to provide a self-emulsifying organosilicon anti-wrinkle finishing agent, and a preparation method and application thereof.
In order to solve the technical problems, the invention provides a self-emulsifying polyether modified organosilicon anti-wrinkle finishing agent, which comprises the following steps of firstly selecting a long polyether chain segment and a relatively short siloxane chain segment, selecting isophorone diisocyanate which is commonly used as a raw material of water-based polyurethane as active groups, obtaining a self-emulsifying effect through repeated hydrophilic ethoxy units, enabling emulsion drops to be uniformly dispersed in water through steric hindrance effect and not easy to agglomerate, and enabling a blocking agent methyl ethyl ketone oxime to provide a low deblocking temperature, wherein the structural general formula of the blocking agent methyl ethyl ketone oxime is shown as the following formula I:
as an improvement of the self-emulsifiable organosilicon crease-resistant finishing agent:
r is:
R 1 the method comprises the following steps:
x: y is less than or equal to 3:1 and is an integer ratio.
As a further improvement of the self-emulsifiable organosilicon crease-resistant finishing agent, the self-emulsifiable organosilicon crease-resistant finishing agent is any one of the following:
[HMM(D 4 ) 3 (D 4 H ) 1 -APEG 1000 (n＝22)]-IPDI-MEKO of the formula:
[HMM(D 4 ) 3 (D 4 H ) 1 -APEG 1200 (n＝26)]-IPDI-MEKO of the formula:
[HMM(D 4 ) 3 (D 4 H ) 1 -APEG 1000 (n＝22)]-TDI-MEKO of the formula:
the invention also provides a preparation method of the self-emulsifying organosilicon anti-wrinkle finishing agent, which comprises the following steps:
1) The reactant is tetramethyl disiloxane(HMM)、D 4 And D 4 H The composition of the composite material comprises the components,
tetramethyl disiloxane is used as a blocking agent, and D is used under the catalysis of concentrated sulfuric acid with the mass of 3% of the total mass of reactants 4 And D 4 H The method comprises the steps of performing ring-opening reaction to obtain hydrogen-containing silicone oil, wherein the structural formula of the hydrogen-containing silicone oil is shown as the following formula II:
the D is 4 ：D 4 H Molar ratio of less than or equal to 3:1, HMM: d (D) 4 H =1: 1 in molar ratio;
the temperature of the ring-opening reaction is 60+/-5 ℃ and the time is 5+/-0.5 hours;
description: by controlling D 4 And D 4 H The ratio of the amounts of the substances added, namely changing the ratio between x and y, can prepare silicone oils with different hydrogen contents;
2) In a solvent I, under the action of a catalyst, carrying out hydrosilylation reaction on the hydrogen-containing silicone oil obtained in the step 1) and allyl polyoxyethylene ether to prepare polyether-modified polysiloxane serving as a finishing agent precursor, wherein the structural formula of the polyether-modified polysiloxane is shown as the following formula III:
the polyether: n is more than or equal to 22;
description: the polyether is a long-chain segment grafted to polysiloxane, the hydrophilicity is mainly represented by the fact that the hydrophobicity of a hydrophobic segment is weaker than that of a hydrophilic segment, and the polyether can be self-emulsified by directly adding the polyether into water;
the hydrogen silicone oil: allyl polyoxyethylene ether = 1:3.6 molar ratio;
the catalyst is chloroplatinic acid, and the chloroplatinic acid: hydrogen silicone oil = 25 ± 5 μg/g;
the temperature of the hydrosilylation reaction is 80-120 ℃ (preferably 90 ℃) and the time is 4+/-0.5 h;
3) And in a solvent II, carrying out esterification reaction on the polyether modified polysiloxane obtained in the step 2) and isocyanate, adding an isocyanate blocking agent into an esterification reaction product, and carrying out blocking treatment on the residual isocyanate to obtain the self-emulsifying polyether modified organosilicon anti-wrinkle finishing agent (formula I).
The polyether modified polysiloxane: isocyanate=1:3 to 3.6 molar ratio (preferably 1:3.6), esterification reaction temperature is 48 to 60 ℃ (preferably reaction temperature 55 ℃), reaction time is 2 to 4 hours (preferably 3 hours);
in the blocking treatment, isocyanate groups: isocyanate blocking agent = 1:1 to 1.2 molar ratio (preferably 1:1.2); the end-capping treatment temperature is the same as the esterification reaction temperature, and the end-capping treatment time is 1-2 h (preferably 1.5 h).
The preparation method of the self-emulsifying polyether modified organosilicon crease-resistant finishing agent is improved by the following steps:
the allyl polyoxyethylene ether in the step 2) is any one of the following: APEG (APEG) 1000 、APEG 1200 ；
The isocyanate in the step 3) is any one of the following: IPDI (isophorone diisocyanate), TDI (toluene diisocyanate).
The isocyanate blocking agent in the step 3) is any one of the following: methyl Ethyl Ketoxime (MEKO), 2-methylimidazole (2-MI).
The preparation method of the self-emulsifying polyether modified organosilicon crease-resistant finishing agent is improved by the following steps:
the product obtained by the ring-opening reaction in the step 1) is subjected to post-treatment to obtain hydrogen-containing silicone oil;
the post-treatment is as follows: adding excessive sodium bicarbonate into the product obtained by the ring-opening reaction to neutralize sulfuric acid, filtering to remove filter residues, and rotary steaming the obtained filtrate to remove unreacted low-boiling-point raw materials; the unreacted low boiling point raw material is tetramethyl disiloxane.
As a further improvement of the preparation method of the self-emulsifying polyether modified organosilicon crease-resistant finishing agent:
in the step 2):
the solvent I is toluene;
mixing hydrogen-containing silicone oil and allyl polyoxyethylene ether, heating to 50+/-10 ℃, adding a catalyst, preserving heat for 30+/-5 min, heating to 80-120 ℃ (preferably 90 ℃) and performing hydrosilylation reaction;
and (3) removing the solvent I by rotary evaporation of the product obtained by the reaction to obtain the polyether modified polysiloxane serving as the precursor of the finishing agent.
As a further improvement of the preparation method of the self-emulsifying polyether modified organosilicon crease-resistant finishing agent:
in the step 3):
the solvent II is acetone;
dissolving polyether modified polysiloxane in a solvent II, slowly dropwise adding an isocyanate solution obtained by dissolving isocyanate in the solvent II, and carrying out esterification reaction under stirring at a rotating speed of 40-60 r/min; when the mixture is slowly dripped, the temperature of the reaction system is required to be controlled to be not more than 55 ℃;
and adding an isocyanate blocking agent into the esterification reaction product for blocking treatment, and finally removing the solvent II by rotary evaporation to obtain the organosilicon anti-wrinkle finishing agent containing multiple active groups.
Description: the addition in this step 3) is carried out by dropping the polyether-modified polysiloxane into the isocyanate, and slow and rapid stirring is required for the dropping.
The invention also provides application of the self-emulsifying modified organosilicon anti-wrinkle finishing agent in the textile field: for finishing fabrics; the fabric is immersed in a solution containing the crease-resistant finishing agent, padded for two or more times and dried.
Compared with the technology improvement points of organosilicon anti-wrinkle finishing agent containing multiple active groups, a preparation method and application thereof, the invention mainly shortens the chain length of polysiloxane with hydrophobic segment and correspondingly increases the chain length of polyether with hydrophilic segment; the beneficial effects/technical advantages of the invention are mainly as follows: the self-emulsifying agent is directly added into water for stirring without adding an emulsifying agent, so that the self-emulsifying agent is convenient to operate, and the commercial cost is reduced.
Drawings
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 shows a schematic diagram of [ HMM (D) 4 ) 3 (D 4 H ) 1 -APEG 1000 (n＝22)]-a nuclear magnetic structure characterization map of IPDI-MEKO;
FIG. 2 is a diagram of [ HMM (D) 4 ) 3 (D 4 H ) 1 -APEG 1200 (n＝26)]-a nuclear magnetic structure characterization map of IPDI-MEKO.
Detailed Description
The invention will be further described with reference to the following specific examples, but the scope of the invention is not limited thereto:
D 4 octamethyl cyclotetrasiloxane;
D 4 H 1,3,5, 7-tetramethyl cyclotetrasiloxane;
HMM, tetramethyl disiloxane;
IPDI, isophorone diisocyanate;
TDI, toluene diisocyanate;
concentrated sulfuric acid is sulfuric acid with the mass concentration of 98%;
step 3), the rotating speed of the rapid stirring is 40-60 r/min;
room temperature, 25±5 ℃;
the structural formula of the hydrogen-containing silicone oil obtained in the step 1) is shown as the following formula II:
the structural formula of the polyether modified polysiloxane obtained in the step 2) is shown as the following formula III:
the detection means and method are as follows:
example 1, the preparation method of the self-emulsifying polyether modified organosilicon crease-resistant finishing agent sequentially comprises the following steps:
1) 0.3mol (about 88.8 g) of D is added at room temperature 4 0.1mol (about 24 g) of D 4 H And 0.1mol (about 13.4 g) HMM as a reactant; adding concentrated sulfuric acid accounting for 3 percent (mass%) of the total amount of reactants as a catalyst, and reacting for 5 hours at 60 ℃;
adding excessive sodium bicarbonate (about 12 g) to the obtained reaction product to neutralize sulfuric acid, then removing filter residues by suction filtration, and removing unreacted raw materials (HMM) with low boiling point by rotary evaporation (60 ℃); obtaining hydrogen-containing silicone oil.
The structural general formula of the hydrogen-containing silicone oil is as follows: x=3, y=1;
therefore, the specific structural formula of the hydrogen-containing silicone oil is as follows:
description: the components of the filter residue are mainly as follows: sodium sulfate, unreacted sodium bicarbonate;
2) Taking toluene as solvent, taking 0.01mol (about 12.62 g) of hydrogen-containing silicone oil and 0.036mol (about 36 g) of APEG 1000 Heating to 50 ℃, adding a trace amount of chloroplatinic acid catalyst (chloroplatinic acid: hydrogen-containing silicone oil=25 mug/g), then preserving heat for 30min, heating to 90 ℃ for reaction for 4h, and removing a solvent (namely toluene) by rotary evaporation to obtain the polyether modified polysiloxane serving as a finishing agent precursor.
The polyether modified polysiloxane has a structural general formula: x=3, y=1, polyether formula-CH 2 -CH 2 -CH 2 O-(CH 2 CH 2 O) 22 -H。
Thus, the specific structural formula of the polyether modified polysiloxane is:
3) 0.01mol (about 42.62 g) of the polyether-modified polysiloxane was dissolved in 50mL of acetone, and 0.036mol (about 7.992 g) of IP was slowly droppedDI was dissolved in 30ml of acetone to obtain a solution, which was rapidly stirred, reacted at 55℃for 3 hours, then 0.0432mol (about 3.75 g) of a capping agent Methyl Ethyl Ketone Oxime (MEKO) was added to continue the reaction for 1.5 hours, and then the solvent (acetone) was removed by spin evaporation to obtain an anti-wrinkle finishing agent: [ HMM (D) 4 ) 4 (D 4 H ) 1 -APEG 1000 (n＝22)]-IPDI-MEKO。
The nuclear magnetic structure characterization diagram is shown in figure 1.
Example 2
With respect to example 1, the following changes were made: APEG in step 2) is subjected to 1000 Change into APEG 1200 The molar amount remained unchanged, i.e. "0.036mol of APEG 1000 "modified" to 0.036mol APEG 1200 "; the subsequent step 3) employs 0.01mol of the polyether modified polysiloxane obtained in this step 2); the remainder was identical to example 1.
Obtaining the crease-resistant finishing agent: [ HMM (D) 4 ) 3 (D 4 H ) 1 -APEG 1200 (n＝26)]-IPDI-MEKO。
The nuclear magnetic structure characterization diagram is shown in fig. 2.
Example 3, changing the IPDI in step 3) of example 1 to TDI, the molar amount remained unchanged, the remainder being identical to example 1. The final anti-wrinkle finishing agent is as follows: [ HMM (D) 4 ) 3 (D 4 H ) 1 -APEG 1000 (n＝22)]-TDI-MEKO。
The results of the self-emulsifying property test of examples 1 to 3 are shown in the following table 1.
TABLE 1 self-emulsifying Property test results
| Emulsion stability | Particle size/nm | |
| [HMM(D 4 ) 3 (D 4 H ) 1 -APEG 1000 (n＝22)]-IPDI-MEKO | Not precipitated | 157.6 |
| [HMM(D 4 ) 3 (D 4 H ) 1 -APEG 1200 (n＝26)]-IPDI-MEKO | Not precipitated | 178.6 |
| [HMM(D 4 ) 3 (D 4 H ) 1 -APEG 1000 (n＝22)]-TDI-MEKO | Not precipitated | 168.5 |
| [HMM(D 4 ) 6 (D 4 H ) 1 -APEG 400 (n＝26)]-IPDI-MEKO | Precipitation | 385.6 |
Experiment 1 the crease-resistant finishing agent obtained in example 1 was used for crease-resistant finishing of silk fabrics, and specifically comprises the following steps:
ultrasonically dispersing the crease-resistant finishing agent obtained in the example 1 in water to form an aqueous emulsion with the concentration of 15g/L as finishing liquid; fully soaking the silk fabric in the finishing liquid for 5min, soaking twice, rolling twice, wherein the rolling residual rate is 93%, and then pre-baking for 3min in an oven at 80 ℃ and baking for 3min in a baking machine at 130 ℃.
Experiment 2, "crease resistant finishing agent obtained in example 1" in experiment 1 was changed to "crease resistant finishing agent obtained in example 2"; the remainder was identical to experiment 1.
Experiment 3, "crease resistant finishing agent obtained in example 1" in experiment 1 was changed to "crease resistant finishing agent obtained in example 3"; the remainder was identical to experiment 1.
Experiment 4, the concentration of the finishing liquid in experiment 1 is changed from 15g/L to 10g/L, and the rest is the same as experiment 1.
Experiment 5, the rest is the same as experiment 1, except that the baking at 130 ℃ for 3min in experiment 1 is changed into the baking at 110 ℃ for 3min.
Comparative experiment 1, the "anti-wrinkle finish obtained in example 1" in experiment 1 was changed to a commercially available citric acid anti-wrinkle finish; the remainder was identical to experiment 1.
Anti-wrinkle finish obtained in example 5 of comparative experiments 2, 2021112191832 [ HMM (D) 4 ) 6 (D 4 H ) 1 —APEG-400(n＝8)]-HMDI-MEKO is tested according to its set experimental method: preparing 20g/L crease-resistant agent finishing liquid, fully soaking real silk fabric in the finishing liquid for 5min at room temperature, soaking twice, rolling twice, wherein the rolling residual rate is 93%, and then pre-baking for 3min in an oven at 80 ℃ and baking for 5min in a baking machine at 140 ℃.
The real silk fabrics treated in the above experiments 1 to 5 and comparative experiments 1 to 2 and the original real silk fabrics used in the experiments (as blank) were subjected to wrinkle resistance test, respectively, and the obtained results are shown in table 2 below.
Table 2, results of anti-wrinkle Properties test of fabrics
TABLE 3 comparison of Properties before and after finishing
Description: the parameters set in comparative experiment 2 were [ HMM (D) 4 ) 6 (D 4 H ) 1 —APEG-400(n＝8)]Preferred conditions for HMDI-MEKO. Namely, [ HMM (D) 4 ) 6 (D 4 H ) 1 —APEG-400(n＝8)]HMDI-MEKO, if subjected to the conditions described in experiment 1, results in a decrease in anti-wrinkle properties.
As can be seen from table 1, the prepared 3 kinds of finishing agents all have self-emulsifying property; it can be seen from table 2 that the longer the hydrophilic end of the finishing agent is, the better the finishing effect is, and the finishing agent can play a larger role at a proper dosage and baking temperature; from Table 3, it can be seen that the smoothness and softness of the fabric finished by the self-made finishing agent are improved, and the hydrophilicity is also improved.
Finally, it should also be noted that the above list is merely a few specific embodiments of the present invention. Obviously, the invention is not limited to the above embodiments, but many variations are possible. All modifications directly derived or suggested to one skilled in the art from the present disclosure should be considered as being within the scope of the present invention.
Claims (6)
1. The self-emulsifying polyether modified organosilicon crease-resistant finishing agent is characterized by being any one of the following: [ HMM (D) 4 ) 3 (D 4 H ) 1 -APEG 1000 (n＝22)]-IPDI-MEKO of the formula:
[HMM(D 4 ) 3 (D 4 H ) 1 -APEG 1200 (n＝26)]-IPDI-MEKO of the formula:
[HMM(D 4 ) 3 (D 4 H ) 1 -APEG 1000 (n＝22)]-TDI-MEKO of the formula:
2. the method for preparing the self-emulsifying organosilicon anti-wrinkle finishing agent according to claim 1, which is characterized by comprising the following steps:
1) Reactant is composed of tetramethyl disiloxane, D 4 And D 4 H The composition of the composite material comprises the components,
tetramethyl disiloxane is used as a blocking agent, and D is used under the catalysis of concentrated sulfuric acid accounting for 3 percent of the total mass of reactants 4 And D 4 H The method comprises the steps of performing ring-opening reaction to obtain hydrogen-containing silicone oil, wherein the structural formula of the hydrogen-containing silicone oil is shown as the following formula II:
the D is 4 ：D 4 H Molar ratio =1 to 3:1, HMM: d (D) 4 H =1: 1 in molar ratio;
the temperature of the ring-opening reaction is 60+/-5 ℃ and the time is 5+/-0.5 hours;
2) In a solvent I, under the action of a catalyst, carrying out hydrosilylation reaction on the hydrogen-containing silicone oil obtained in the step 1) and allyl polyoxyethylene ether to prepare polyether-modified polysiloxane serving as a finishing agent precursor, wherein the structural formula of the polyether-modified polysiloxane is shown as the following formula III:
the allyl polyoxyethylene ether is any one of the following: APEG (APEG) 1000 、APEG 1200 ；
The polyether: n is more than or equal to 22;
R 1 the method comprises the following steps:
the hydrogen silicone oil: allyl polyoxyethylene ether = 1:3.6 molar ratio;
the catalyst is chloroplatinic acid, and the chloroplatinic acid: hydrogen silicone oil = 25 ± 5 μg/g;
the temperature of the hydrosilylation reaction is 80-120 ℃ and the time is 4+/-0.5 h;
3) In a solvent II, the polyether modified polysiloxane obtained in the step 2) is subjected to esterification reaction with isocyanate, and an isocyanate blocking agent is added into the obtained product of the esterification reaction to carry out blocking treatment on the rest isocyanate, so that the self-emulsifying polyether modified organosilicon anti-wrinkle finishing agent is prepared;
the isocyanate is any one of the following: isophorone diisocyanate and toluene diisocyanate;
the isocyanate blocking agent is: methyl ethyl ketoxime;
the polyether modified polysiloxane: isocyanate=1:3-3.6, the esterification reaction temperature is 48-60 ℃, and the reaction time is 2-4 h;
in the blocking treatment, isocyanate groups: isocyanate blocking agent = 1:1 to 1.2 molar ratio; the end capping treatment temperature is the same as the esterification reaction temperature, and the end capping treatment time is 1-2 h.
3. The method for preparing the self-emulsifying organosilicon anti-wrinkle finishing agent according to claim 2, which is characterized in that:
the product obtained by the ring-opening reaction in the step 1) is subjected to post-treatment to obtain hydrogen-containing silicone oil;
the post-treatment is as follows: adding excessive sodium bicarbonate into the product obtained by the ring-opening reaction to neutralize sulfuric acid, filtering to remove filter residues, and rotary steaming the obtained filtrate to remove unreacted low-boiling-point raw materials; the unreacted low boiling point feedstock is referred to as tetramethyldisiloxane.
4. The method for preparing the self-emulsifying organosilicon anti-wrinkle finishing agent according to claim 3, wherein the method comprises the following steps:
in the step 2):
the solvent I is toluene;
mixing hydrogen-containing silicone oil and allyl polyoxyethylene ether, heating to 50+/-10 ℃, adding a catalyst, preserving heat for 30+/-5 min, and heating to 80-120 ℃ to perform hydrosilylation;
and (3) removing the solvent I by rotary evaporation of the product obtained by the reaction to obtain the polyether modified polysiloxane serving as the precursor of the finishing agent.
5. The method for preparing the self-emulsifying organosilicon anti-wrinkle finishing agent according to claim 4, which is characterized in that:
in the step 3):
the solvent II is acetone;
dissolving polyether modified polysiloxane in a solvent II, slowly dropwise adding an isocyanate solution obtained by dissolving isocyanate in the solvent II, and stirring to perform esterification reaction; when the mixture is slowly dripped, the temperature of the reaction system is required to be controlled to be not more than 55 ℃;
and adding an isocyanate blocking agent into the esterification reaction product for blocking treatment, and finally removing the solvent II by rotary evaporation to obtain the organosilicon anti-wrinkle finishing agent containing multiple active groups.
6. The use of a self-emulsifying silicone anti-wrinkle finish according to claim 1, wherein: for finishing fabrics; the fabric is immersed in a solution containing the crease-resistant finishing agent, padded for two or more times and dried.
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| Publication number | Priority date | Publication date | Assignee | Title |
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