Novel polyamide phenolic yellowing resistant agent as well as preparation method and application thereof

Abstract

The invention relates to the technical field of anti-phenolic yellowing agents, and discloses a novel chinlon anti-phenolic yellowing agent, which comprises the following components in percentage by weight: 20-35% of pH regulator; 20 to 35% of sulfonate; 0-20% of alcohol ether carboxylate; 10 to 50% of water; and 0.1-0.25% of a polyester polyether type defoaming agent. The anti-phenolic yellowing agent solves the problems that common anti-phenolic yellowing agents on the market are low in pH, large in foam, not washable and the like, the anti-phenolic yellowing effect of chinlon and blended fabrics thereof can be effectively improved, the effect of the anti-phenolic yellowing agent is obviously superior to that of a low-foam anti-phenolic yellowing agent of an acrylic acid system, the corrosion of printing and dyeing equipment can be effectively relieved due to the non-low pH value, and the anti-phenolic yellowing agent has a good anti-phenolic yellowing effect. The addition of the pH regulator can also play a certain role in scale inhibition, is beneficial to the stability of printed and dyed products, and further improves the processing quality.

Description

Technical Field

[0001] The invention relates to the technical field of phenolic yellowing resistance agents, and in particular to a novel nylon phenolic yellowing resistance agent and a preparation method and application thereof. Background Art

[0002] Nylon is a synthetic fiber that is wear-resistant, lightweight, elastic, and has various functional properties (such as waterproof, breathable, flame retardant, etc.) after finishing. The biggest feature of nylon is its wear resistance. Its wear resistance is twice that of common synthetic fibers, and even better than some natural fibers such as cotton and wool. This makes nylon an ideal choice for making wear-resistant clothing and industrial products. For example, nylon is widely used to make sportswear, hiking shoes, and cycling clothes, which need to be able to withstand long-term use and friction. In addition to its wear-resistant properties, nylon is also lightweight. This makes wearing nylon clothing lighter and more comfortable, especially in hot summer. It is also widely used in outdoor equipment such as tents, sleeping bags, backpacks, etc.

[0003] However, the yellowing problem of white or light-colored textiles during finishing, storage and transportation is very difficult. Fabrics containing elastic spandex are affected by various factors and turn yellow, which seriously affects the appearance and performance of textiles. At the same time, it causes claims and disputes between textile processing units, clothing manufacturers and even end users.

[0004] Generally speaking, the following factors affect phenol yellowing:

[0005] (1) Light and heat (including heat setting and lamination processing) cause the fiber bonds of nylon fabric to break and decompose, causing yellowing;

[0006] (2) Nitrogen oxides (NOx) in the air cause amino oxidation of nylon fabrics, generating yellow substances, leading to yellowing;

[0007] (3) The fabric is alkaline and is more likely to cause yellowing. pH < 6 generally does not cause yellowing;

[0008] (4) The polyethylene plastic film used for packaging contains an anti-aging agent, the chemical name of which is 2 / 6 diisobutylphenol (BHT). Phenol substances react chemically under certain conditions to form a yellow organic compound containing nitric acid, which causes the fabric to turn yellow.

[0009] (5) Yellowing may occur in high temperature environments due to fiber oxidation, fiber and spinning lubricants, and impurities on the fiber. Other yellowing problems may occur when synthetic fiber fabrics are laminated, especially women's underwear;

[0010] There are many anti-phenol yellowing products on the market, and the anti-phenol yellowing effect is also good, but their main ingredients are almost all alkyl sulfonic acid surfactants, and their pH is very low, which will corrode the processing equipment for a long time. Moreover, the pH of the processed cloth surface is usually below 4, and it is necessary to meet the requirements of the cloth surface pH by washing or neutralization. The water cost and labor cost of the processing unit are increased. At the same time, there are a lot of foams, and it is difficult to defoam, which causes a lot of inconvenience to the printing and dyeing processing, and may cause defects in the later dyeing. Of course, there are also low-foam anti-phenol yellowing agents on the market, which are mainly based on acrylic acid systems, have poor effects, and require additional acid supplementation, which complicates the operation steps. Finally, this type of product is not washable, and the anti-phenol yellowing effect of consumers after washing is significantly deteriorated, which will cause dissatisfaction among consumers. Based on this, the present invention proposes a new nylon anti-phenol yellowing agent to solve the above problems. Summary of the invention

[0011] The purpose of the present invention is to solve the problems existing in the prior art and to propose a new type of nylon anti-phenol yellowing agent.

[0012] In order to achieve the above object, the present invention adopts the following technical solutions:

[0013] A new type of nylon anti-phenol yellowing agent, calculated by percentage, includes:

[0014] pH adjuster 20-35%;

[0015] Sulfonates 20-35%;

[0016] Alcohol ether carboxylate 0-20%;

[0017] Water 10-50%;

[0018] Polyester polyether type defoamer 0.1-0.25%.

[0019] Preferably, the pH regulator includes one or a mixture of two or more of sodium citrate, sodium gluconate, sodium tartrate, sodium malate, trisodium phosphate, sodium pyrophosphate, sodium polyaspartate, maleic acid-acrylic acid copolymer, sodium succinate, hexamethylenetriaminepenta(methylenephosphonic acid), hexamethylenediaminetetravalent phosphonic acid, 2-hydroxyphosphoacetic acid, and 2-phosphonobutane-1,2,4-tricarboxylic acid acetic acid; the addition of the pH regulator makes the solution acidic, effectively avoiding the phenomenon that BHT causes nylon yellowing under alkaline conditions.

[0020] Preferably, the sulfonates include one or a mixture of fatty acid sulfonates and alkyl sulfonates; under acidic conditions, the ionized anions can combine with the amino and amide groups on the nylon, thereby occupying the position and blocking the groups, effectively preventing the oxidation of the amino and amide groups, thereby preventing the yellowing of the nylon. At the same time, due to the covalent bond, the breakage requires a relatively high bond energy, so it has certain wash resistance.

[0021] Preferably, the fatty acid sulfonate includes one or a mixture of two or more of sodium fatty acid methyl ester sulfonate, sodium coconut oil isethionate, sodium fatty acid ethyl ester sulfonate, sodium di-sec-octyl maleate sulfonate, sodium N,N-oleoyl distaurate, and sodium dibutylnaphthalene sulfonate.

[0022] Preferably, the alkyl sulfonate comprises one or a mixture of two or more of sodium α-olefin sulfonate, sodium alkylbenzene sulfonate, sodium linear alkylbenzene sulfonate, sodium branched alkylbenzene sulfonate, sodium linear secondary alkylbenzene sulfonate, and sodium branched secondary alkylbenzene sulfonate.

[0023] Preferably, the alcohol ether carboxylate includes one or a mixture of two or more of AEC-7, AEC-8, AEC-9, AEC-10, and AEC-13; the alcohol ether carboxylate has good emulsification permeability, can clean the nylon fabric surface well, and better penetrate into the fiber; at the same time, it can also combine with amino and amide groups, effectively blocking their combination with nitrogen oxides in the air, and also has certain wash resistance.

[0024] A method for preparing a novel nylon anti-phenol yellowing agent comprises the following steps:

[0025] The pH regulator was mixed with deionized water and stirred at a speed of 100 r / min for 15 min;

[0026] Add sulfonates, raise the temperature to 40°C, and stir at 150 r / min for 30 min;

[0027] After stirring evenly, cool to 25°C, continue to add polyester polyether defoamer and stir at a speed of 100 r / min for 10 minutes to obtain a new nylon anti-phenol yellowing agent.

[0028] Application of a new type of nylon anti-phenolic yellowing agent in nylon and its blended fabrics.

[0029] Preferably, the steps include:

[0030] Put nylon and its blended fabrics into the new nylon anti-phenol yellowing agent, and select the dipping process or the padding process;

[0031] in:

[0032] The impregnation process parameters are: bath ratio 1:10-20, dosage 1.0-5.0% OWF, speed 30-70r / min, temperature 80-100°C, and insulation 15-45min;

[0033] The padding process parameters are: liquid rate 50-100%, dosage 25-100g / l, shaping temperature 130-180°C, shaping time 45-180S, and padding method one dip and one roll or two dips and two rolls.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The invention solves the problems of low pH, high foam, poor washability and the like of common anti-phenol yellowing agents on the market, and can effectively improve the anti-phenol yellowing effect of nylon and its blended fabrics. The effect is significantly better than that of low-foam anti-phenol yellowing agents based on acrylic acid system. Its not low pH can effectively alleviate the corrosion of printing and dyeing equipment. The addition of chelating agent can also play a role in scale inhibition, which is beneficial to the stability of printing and dyeing products. Compared with the prior art, the invention can be used not only for dipping but also for padding. No acid supplementation is required during the processing, and the product can be bathed in the same bath as waterproofing, which has little effect on waterproofing. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] Example 1

[0038] 25 parts of sodium citrate and 50 parts of deionized water were mixed and stirred at a speed of 100 r / min for 15 minutes. Then 25 parts of sodium coconut oil isethionate were added, the temperature was raised to 40°C, and the mixture was stirred at a speed of 150 r / min for 30 minutes. After stirring evenly, the temperature was lowered to 25°C, and 0.15 parts of polyester polyether defoamer were added and stirred at a speed of 100 r / min for 10 minutes to obtain a new nylon anti-phenol yellowing agent.

[0039] Example 2

[0040] 25 parts of sodium citrate and 40 parts of deionized water were mixed and stirred at 100 r / min for 15 minutes. Then 25 parts of sodium coconut oil isethionate and 10 parts of AEC-9 were added and heated to 40°C and stirred at 150 r / min for 30 minutes. After stirring evenly, the temperature was lowered to 25°C, and 0.25 parts of polyester polyether defoamer were added and stirred at 100 r / min for 10 minutes to obtain a new nylon anti-phenol yellowing agent.

[0041] Example 3

[0042] 30 parts by mass of sodium malate and 40 parts by mass of deionized water were mixed and stirred at a speed of 100 r / min for 15 minutes. Then 25 parts of sodium coconut oil isethionate and 10 parts of AEC-9 were added and heated to 40°C and stirred at a speed of 150 r / min for 30 minutes. After stirring evenly, the temperature was lowered to 25°C, and 0.25 parts of polyester polyether defoamer were added and stirred at a speed of 100 r / min for 10 minutes to obtain a new nylon anti-phenol yellowing agent.

[0043] Example 4

[0044] 30 parts of sodium malate and 40 parts of deionized water were mixed and stirred at 100 r / min for 15 minutes. Then 25 parts of sodium N,N-oleoyl ditaurate and 10 parts of AEC-10 were added and heated to 40°C and stirred at 150 r / min for 30 minutes. After stirring evenly, the temperature was lowered to 25°C, and 0.25 parts of polyester polyether defoamer were added and stirred at 100 r / min for 10 minutes to obtain a new nylon anti-phenol yellowing agent.

[0045] Example 5

[0046] 30 parts by mass of hexamethylene triamine penta (methylene phosphonic acid) and 40 parts by mass of deionized water were mixed and stirred at a speed of 100 r / min for 15 minutes. Then 25 parts of sodium α-olefin sulfonate and 10 parts of AEC-10 were added and heated to 40°C and stirred at a speed of 150 r / min for 30 minutes. After stirring evenly, the temperature was lowered to 25°C, and 0.25 parts of polyester polyether defoamer were added and stirred at a speed of 100 r / min for 10 minutes to obtain a new nylon anti-phenol yellowing agent.

[0047] Example 6

[0048] 30 parts by mass of hexamethylene triamine penta (methylene phosphonic acid) and 40 parts by mass of deionized water were mixed and stirred at a speed of 100 r / min for 15 minutes. Then 25 parts of linear alkyl benzene sulfonate and 10 parts of AEC-13 were added and heated to 40°C and stirred at a speed of 150 r / min for 30 minutes. After stirring evenly, the temperature was lowered to 25°C, and 0.25 parts of polyester polyether defoamer were added and stirred at a speed of 100 r / min for 10 minutes to obtain a new nylon anti-phenol yellowing agent.

[0049] Example 6

[0050] Blend 30 parts by mass of 2-phosphonobutane-1,2,4-tricarboxylic acid acetic acid with 40 parts by mass of deionized water, and stir at a speed of 100 r / min for 15 minutes. Then add 25 parts of linear secondary alkylbenzene sulfonate sodium and 10 parts of AEC-13, heat to 40°C, and stir at a speed of 150 r / min for 30 minutes. After stirring evenly, cool to 25°C, continue to add 0.25 parts of polyester polyether defoamer and stir at a speed of 100 r / min for 10 minutes to obtain a new nylon anti-phenol yellowing agent.

[0051] In order to verify the effect of the novel nylon anti-phenolic yellowing agent proposed by the present invention, the novel nylon anti-phenolic yellowing agent prepared in the above Examples 1-6 is now compared with a low-foaming anti-phenolic yellowing agent based on an acrylic acid system (hereinafter referred to as a fine product):

[0052] The novel nylon anti-phenolic yellowing agent prepared in the above Examples 1-6 and the competing product were immersed at 80° C. for 30 min according to the same dosage of 3.0% OWF, and then dehydrated and dried.

[0053] Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Competitors Phenolic yellowing resistance grade / level 4-5 4+ 4-5 5- 4-5+ 4-5 4 Foam / cm 9 5 6 5 7 7 10

[0054] It can be seen from the above table that the phenol yellowing resistance levels of Examples 1-6 are better than those of competing products, and the foam is also lower than that of competing products.

[0055] The new nylon anti-phenol yellowing agent prepared in the above Examples 1-6 and the competing products were used at the same dosage of 30.0 g / l, and the fluorine-free waterproofing agent SG-5505 was used at 30 g / l, and the mixture was dipped and rolled, and then shaped and dried at 160°C.

[0056]

[0057]

[0058] It can be seen from the above table that the phenol yellowing resistance levels of Examples 1-6 are better than those of competing products, and the impact on waterproofing is significantly less than that of competing products.

[0059] From the above content, we can conclude that:

[0060] The invention solves the problems of low pH, high foam, poor washing resistance, etc. of common anti-phenol yellowing agents on the market, and can effectively improve the anti-phenol yellowing effect of nylon and its blended fabrics. The effect is significantly better than the low-foam anti-phenol yellowing agent based on acrylic acid system. Its high pH can effectively alleviate the corrosion of printing and dyeing equipment. The addition of pH regulator can also play a certain anti-scaling effect, which is beneficial to the stability of printing and dyeing products.

[0061] The invention can be used not only for dipping but also for padding, and no acid supplement is needed during the processing, and the invention can be bathed together with waterproofing, so the effect on waterproofing is small.

[0062] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A new type of nylon anti-phenol yellowing agent, characterized in that: In percentage terms, this includes: pH adjuster 20-35%; Sulfonates 20-35%; Alcohol ether carboxylate 0-20%; Water 10-50%; Polyester polyether type defoamer 0.1-0.25%.

2. A novel nylon anti-phenolic yellowing agent according to claim 1, characterized in that: The pH regulator comprises one or a mixture of two or more of sodium citrate, sodium gluconate, sodium tartrate, sodium malate, trisodium phosphate, sodium pyrophosphate, sodium polyaspartate, maleic acid-acrylic acid copolymer, sodium succinate, hexamethylene triamine penta (methylene phosphonic acid), hexamethylene diamine tetravalent phosphonic acid, 2-hydroxyphosphoacetic acid, and 2-phosphonobutane-1,2,4-tricarboxylic acid acetic acid. The addition of the pH regulator makes the solution acidic, which effectively avoids the phenomenon that BHT causes nylon yellowing under alkaline conditions.

3. The novel nylon anti-phenolic yellowing agent according to claim 1, characterized in that: The sulfonates include one or a mixture of fatty acid sulfonates and alkyl sulfonates; under acidic conditions, the ionized anions can combine with the amino and amide groups on the nylon, thereby occupying the position and blocking the groups, effectively preventing the oxidation of the amino and amide groups, thereby preventing the yellowing of the nylon. At the same time, due to the covalent bond, the breaking requires a relatively high bond energy, so it has certain wash resistance.

4. The novel nylon anti-phenol yellowing agent according to claim 3, characterized in that: The fatty acid sulfonate includes one or a mixture of two or more of sodium fatty acid methyl ester sulfonate, sodium coconut oil isethionate, sodium fatty acid ethyl ester sulfonate, sodium di-sec-octyl maleate sulfonate, sodium N,N-oleoyl distaurate, and sodium dibutylnaphthalene sulfonate.

5. The novel nylon anti-phenolic yellowing agent according to claim 4, characterized in that: The alkyl sulfonate includes one or a mixture of two or more of sodium α-olefin sulfonate, sodium alkylbenzene sulfonate, sodium linear alkylbenzene sulfonate, sodium branched alkylbenzene sulfonate, sodium linear secondary alkylbenzene sulfonate, and sodium branched secondary alkylbenzene sulfonate.

6. The novel nylon anti-phenol yellowing agent according to claim 1, characterized in that: The alcohol ether carboxylate includes one of AEC-7, AEC-8, AEC-9, AEC-10, and AEC-13, or a mixture of two or more thereof; the alcohol ether carboxylate has good emulsification permeability, can clean the nylon fabric surface well, and can better penetrate into the fiber; at the same time, it can also combine with amino and amide groups, effectively blocking their combination with nitrogen oxides in the air, and also has certain wash resistance.

7. A method for preparing the novel nylon anti-phenolic yellowing agent according to any one of claims 1 to 6, characterized in that: The following steps are involved: The pH regulator was mixed with deionized water and stirred at a speed of 100 r / min for 15 min; Add sulfonates, raise the temperature to 40°C, and stir at 150 r / min for 30 min; After stirring evenly, cool to 25°C, continue to add polyester polyether defoamer and stir at a speed of 100 r / min for 10 minutes to obtain a new nylon anti-phenol yellowing agent.

8. Use of the novel nylon anti-phenolic yellowing agent according to any one of claims 1 to 6 in nylon and its blended fabrics.

9. The use of the novel nylon anti-phenol yellowing agent according to claim 8 in nylon and its blended fabrics, characterized in that: The following steps are involved: Put nylon and its blended fabrics into the new nylon anti-phenol yellowing agent, and select the dipping process or the padding process; in: The impregnation process parameters are: bath ratio 1:10-20, dosage 1.0-5.0% OWF, speed 30-70r / min, temperature 80-100°C, and insulation 15-45min; The padding process parameters are: liquid rate 50-100%, dosage 25-100g / l, shaping temperature 130-180°C, shaping time 45-180S, and padding method one dip and one roll or two dips and two rolls.

Images