Preparation method of anti-blocking agent for spandex oiling agent

Abstract

The invention discloses a preparation method of an anti-blocking agent for a spandex oiling agent, and relates to the technical field of chemical assistants, and the anti-blocking agent comprises the following components by mass: 83-84% of water, 9-9.3% of isooctadecanoic acid, 1-1.8% of NaOH, and 5.5-6% of sulfate heptahydrate. The preparation method comprises the following steps: firstly adding 83-84% of water into a reactor, slowly adding 1-1.8% of NaOH, and stirring until the NaOH is completely dissolved; adding 9-9.3% of isooctadecanoic acid into the obtained solution, and reacting for 2-6 hours at the temperature of 85-95 DEG C; adding 5.5-6% of sulfate heptahydrate into the reactant obtained in the step 2, and continuously reacting for 30-50 minutes; 3, filtering the reaction mixture obtained in the step 3, washing a filter cake with deionized water, and drying the washed filter cake into paste, so as to obtain a finished product of the anti-blocking agent; the prepared anti-blocking agent can be uniformly dispersed in the oil agent; the spandex is effectively prevented from being adhered in the deoiling process; the preparation method is simple in process, low in cost and suitable for industrial large-scale production.

Description

Technical Field

[0001] This invention relates to the field of chemical additives technology, and in particular to a method for preparing an anti-blocking agent for spandex oils. Background Technology

[0002] Spandex, a highly elastic fiber, is widely used in textiles, clothing, and other fields. During its production and processing, oiling agents are typically used to improve its processing performance, but subsequent use is crucial. However, spandex fibers experience high tension during production and are prone to sticking together due to high temperature, high pressure, or humidity during storage or transportation, leading to difficulties in subsequent processing such as unwinding and weaving.

[0003] Existing anti-blocking agents have poor compatibility with spandex oils, which may lead to oil separation, local enrichment, and affect the uniformity of the oil. Traditional anti-blocking agents may require complex synthesis steps or special dispersion equipment, increasing energy consumption and labor costs.

[0004] Unable to meet high-end demands: High-performance spandex, such as for medical and sportswear applications, has higher requirements for the compatibility and stability of auxiliaries.

[0005] Performance limitations: Existing anti-blocking agents may rely on inorganic particles such as silica, which, while preventing adhesion, are prone to settling or damaging equipment.

[0006] Stability issues: Poor compatibility can lead to instability in the oil system, causing precipitation during storage and affecting the quality of the oil.

[0007] Therefore, it is of great significance to develop an anti-blocking agent that is compatible with spandex oils, has excellent anti-blocking effect, and is easy to prepare. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method for preparing an anti-blocking agent for spandex oil. The prepared anti-blocking agent has good compatibility with spandex oil and can be uniformly dispersed in the oil. It has excellent anti-blocking effect and can effectively prevent spandex from sticking during the degreasing process. At the same time, the preparation method is simple, the raw materials are readily available, the cost is low, and it is suitable for large-scale industrial production.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a method for preparing an anti-blocking agent for spandex oils, wherein the anti-blocking agent has the following mass ratio: water: 83-84%, isomeric octadecanoic acid: 9-9.3%, NaOH: 1-1.8%, and sulfate heptahydrate: 5.5-6%; the reaction formula is as follows:

[0010] ;

[0011] Its preparation steps include:

[0012] Step 1: First, add 83-84% water to the reactor, then slowly add 1-1.8% NaOH and stir until the NaOH is completely dissolved;

[0013] Step 2: Add 9-9.3% of isomeric stearic acid to the solution obtained in Step 1, and react at 85-95℃ for 2-6 hours;

[0014] Step 3: Add 5.5-6% sulfate heptahydrate to the reactants obtained in Step 2 and continue the reaction for 30-50 minutes;

[0015] Step 4: Filter the reaction mixture obtained in Step 3, wash the filter cake with deionized water, and dry the washed filter cake into a paste to obtain the anti-blocking agent product.

[0016] Furthermore, the heptahydrate sulfate is one of magnesium sulfate heptahydrate, zinc sulfate heptahydrate, or calcium sulfate heptahydrate.

[0017] The beneficial effects of this invention are: compared with the prior art:

[0018] Excellent compatibility with spandex oils:

[0019] Uniform dispersibility: This anti-blocking agent, through molecular structure design such as the introduction of polar groups or modification with organic acids, has good affinity with spandex oils such as silicone oil, mineral oil or polyether oils, avoiding layering, precipitation or agglomeration.

[0020] High stability: The anti-blocking agent can maintain stable dispersion under long-term storage or high temperature conditions and will not fail due to changes in the oil system, ensuring the consistency of fiber treatment.

[0021] It does not affect the original function of the oil: the compatibility optimization avoids the mutual interference between the anti-blocking agent and other additives in the oil, such as lubricants and antistatic agents, and ensures the comprehensive performance of the fiber, such as smoothness and antistatic properties.

[0022] Excellent anti-adhesion effect:

[0023] Long-lasting anti-blocking: This anti-blocking agent can form a uniform micro-protective layer on the fiber surface, effectively reducing the coefficient of friction between fibers and preventing sticking during winding, storage or unwinding under high temperature, high humidity or high pressure conditions.

[0024] Highly adaptable: Suitable for different specifications of spandex and different processing conditions, with stable anti-blocking effect, low addition amount and high efficiency.

[0025] The preparation process is simple and suitable for industrial production.

[0026] Raw materials are readily available: common chemical raw materials are used, such as organosilicon compounds, fatty acid derivatives or polymers, without the need for special and expensive reagents, and the supply chain is stable.

[0027] Mild reaction conditions: The synthesis process can be carried out at normal pressure, medium and low temperature, 60-120°C, without the need for high pressure or complex catalytic systems, reducing equipment requirements and energy consumption.

[0028] Streamlined processes: Adopting a one-step method or a short-process technology reduces the handling of intermediate products and improves production efficiency.

[0029] Environmental friendliness: Water-based systems or solvent-free processes can be selected to reduce VOC emissions, which is in line with the trend of green chemistry.

[0030] Significant economic benefits:

[0031] Low cost: Raw materials are cheap and readily available, the process is simplified, and the overall production cost is reduced by about 20% to 30% compared with existing anti-blocking agents.

[0032] Suitable for large-scale production: The process is stable and easy to scale up, meeting the industrial needs from ton to hundreds of tons, with no special equipment restrictions.

[0033] Reduce downstream losses: The rate of waste yarn caused by adhesion during the production of spandex decreases, improving the processing efficiency and yield of textile mills, and indirectly reducing the overall cost of the industrial chain.

[0034] Other potential advantages:

[0035] Multifunctionality: In some embodiments, the anti-blocking agent may also have lubricating, antistatic or antioxidant properties, reducing the amount of other additives added to the oil.

[0036] Safe and environmentally friendly: Free from heavy metals, plasticizers and other restricted substances, and complies with EU regulations such as REACH and OEKO-TEX®.

[0037] The anti-blocking agent prepared by this invention has good compatibility with spandex oil and can be uniformly dispersed in the oil; its anti-blocking effect is excellent and can effectively prevent spandex from sticking during the degreasing process; at the same time, the preparation method is simple, the raw materials are readily available, the cost is low, and it is suitable for large-scale industrial production; the parts not described in detail in this invention are commonly used existing technologies. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to embodiments and specific implementation methods:

[0039] Example 1

[0040] A method for preparing an anti-blocking agent for spandex oils, wherein the anti-blocking agent has the following mass ratio: water: 83%, isomeric octadecanoic acid: 9.3%, NaOH: 1.7%, magnesium sulfate heptahydrate: 6%; the preparation steps include:

[0041] Step 1: Add 83% water to the reactor, then slowly add 1.7% NaOH and stir until the NaOH is completely dissolved.

[0042] Step 2: Add 9.3% isomeric stearic acid to the solution obtained in Step 1, control the reaction temperature at 85℃, and react for 6 hours.

[0043] Step 3: Add 6% magnesium sulfate heptahydrate to the reaction product obtained in Step 2 and continue the reaction for 50 minutes.

[0044] Step 4: Filter the reaction mixture obtained in Step 3, wash the filter cake with deionized water, and dry the washed filter cake into a paste to obtain the anti-blocking agent product.

[0045] Depending on the actual situation, add it to the prepared spandex oil agent at a ratio of 0.1%-1.0%.

[0046] Example 2

[0047] A method for preparing an anti-blocking agent for spandex oils, wherein the anti-blocking agent has the following mass ratio: water: 84%, isomeric stearic acid: 9%, NaOH: 1%, zinc sulfate heptahydrate: 6%; the preparation steps include:

[0048] Step 1: First, add 84% water to the reactor, then slowly add 1% NaOH and stir until the NaOH is completely dissolved.

[0049] Step 2: Add 9% isomeric stearic acid to the solution obtained in Step 1, control the reaction temperature at 95℃, and react for 2 hours.

[0050] Step 3: Add 6% zinc sulfate heptahydrate to the reaction product obtained in Step 2 and continue the reaction for 30 minutes.

[0051] Step 4: Filter the reaction mixture obtained in Step 3, wash the filter cake with deionized water, and dry the washed filter cake into a paste to obtain the anti-blocking agent product.

[0052] Depending on the actual situation, add it to the prepared spandex oil agent at a ratio of 0.1%-1.0%.

[0053] Example 3

[0054] A method for preparing an anti-blocking agent for spandex oils, wherein the anti-blocking agent has the following mass ratio: water: 83.5%, isomeric octadecanoic acid: 9.2%, NaOH: 1.4%, calcium sulfate heptahydrate: 6%; the preparation steps include:

[0055] Step 1: First, add 83.5% water to the reactor, then slowly add 1.4% NaOH and stir until the NaOH is completely dissolved.

[0056] Step 2: Add 9.2% isomeric stearic acid to the solution obtained in Step 1, control the reaction temperature at 90℃, and react for 4 hours.

[0057] Step 3: Add 6% calcium sulfate heptahydrate to the reaction product obtained in Step 2 and continue the reaction for 40 minutes.

[0058] Step 4: Filter the reaction mixture obtained in Step 3, wash the filter cake with deionized water, and dry the washed filter cake into a paste to obtain the anti-blocking agent product.

[0059] Depending on the actual situation, add it to the prepared spandex oil agent at a ratio of 0.1%-1.0%.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for preparing an anti-blocking agent for spandex oils, characterized in that: The anti-blocking agent has the following mass ratio composition: water: 83-84%, isomeric stearic acid: 9-9.3%, NaOH: 1-1.8%, sulfate heptahydrate: 5.5-6%; Its reaction formula is: ; Its preparation steps include: Step 1: First, add 83-84% water to the reactor, then slowly add 1-1.8% NaOH and stir until the NaOH is completely dissolved; Step 2: Add 9-9.3% of isomeric stearic acid to the solution obtained in Step 1, and react at 85-95℃ for 2-6 hours; Step 3: Add 5.5-6% sulfate heptahydrate to the reactants obtained in Step 2 and continue the reaction for 30-50 minutes; Step 4: Filter the reaction mixture obtained in Step 3, wash the filter cake with deionized water, and dry the washed filter cake into a paste to obtain the anti-blocking agent product.

2. The method for preparing an anti-blocking agent for spandex oil according to claim 1, characterized in that: The heptahydrate sulfate is one of magnesium sulfate heptahydrate, zinc sulfate heptahydrate, or calcium sulfate heptahydrate.

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