Color paste for polyurethane foam and preparation method of color paste

Abstract

The invention relates to color paste for polyurethane foam and a preparation method of the color paste. The color paste for the polyurethane foam is prepared from the following raw materials in parts by weight: 30-40 parts of a modified polyester polyol solution, 0.5-1.5 parts of polyether modified silicone oil, 0.2-0.6 part of a light stabilizer, 0.3-0.8 part of an antioxidant, 3-4 parts of a surfactant, 10-15 parts of polyol and 35-38 parts of toner. According to the technical scheme, the flowing capacity of the color paste is improved by the inventor through the polyether modified silicone oil and the modified polyester polyol solution, so that the color paste is easy to disperse in the use process, and the obtained modified color paste is good in stability, uniform in color paste state, free of agglomeration phenomenon and good in compatibility with materials.

Description

Technical Field

[0001] The invention relates to the technical field of color paste for polyurethane foam cotton, and in particular to a color paste for polyurethane foam cotton and a preparation method thereof. Background Art

[0002] Polyurethane foam, also known as polyurethane sponge, PU sponge or PU foam material, is a foam-like material formed by a polyurethane material through a foaming process. It has a variety of excellent properties and a wide range of applications. Specific advantages include: porosity, polyurethane foam is composed of a large number of micropores and polyurethane resin pore wall meridians, which makes it lightweight, soft, shock-absorbing and other characteristics; low density, due to its internal pore structure, the density of polyurethane foam is relatively low, so it is light; high strength, despite its low density, the physical strength of polyurethane foam is excellent and can withstand certain stretching and compression; strong water absorption capacity, polyurethane foam is hydrophilic, can absorb and retain water at a high speed, and generally has a water absorption rate of 8-10 times its own weight; wear-resistant and durable, polyurethane foam has excellent wear resistance and durability, and can maintain its original shape and performance for a long time. The manufacture of polyurethane foam is mainly achieved through polymer chemical reactions. The manufacturing process involves two main components: polyurethane raw materials and foaming agents. First, the polyurethane raw materials are mixed and the foaming agent is added to form a foaming mixture. Next, a catalyst and stabilizer are added to the mixture to form a foam. The mixture then expands rapidly and fills the mold. Finally, the mold is placed under appropriate temperature and humidity conditions for curing, resulting in a polyurethane foam product with uniform and fine pores.

[0003] Color paste is a kind of pigment and filler, which is widely used in coatings, inks, plastics, textiles and other industries. The production method of color paste mainly includes formula preparation, pigment processing, mixing, color matching and quality inspection. The production process needs to strictly follow the formula requirements to ensure that the proportions of each component are accurate and mixed evenly. After the production, the color paste needs to be quality tested to ensure that its performance meets the expected effect.

[0004] With the continuous advancement of technology and the continuous expansion of application fields, the performance and quality of color paste will continue to improve to meet market demand. The market demand for polyurethane foam using color paste to dye polyurethane foam into various specific colors is increasing. However, the poor compatibility of traditional color paste with polymers will lead to the phenomenon that the product cannot be emulsified during use, and the stability is poor in subsequent use. After long-term use, it may cause dye migration.

[0005] Therefore, there is an urgent need for a polyurethane color paste with good dyeing stability. Summary of the invention

[0006] In view of the problems existing in the prior art, the object of the present invention is to provide a color paste for polyurethane foam and a preparation method thereof.

[0007] In order to achieve the above-mentioned purpose, the present invention provides the following technical scheme: a color paste for polyurethane foam cotton, comprising at least the following components by mass: 30-40 parts of modified polyester polyol solution, 0.5-1.5 parts of polyether modified silicone oil, 0.2-0.6 parts of light stabilizer, 0.3-0.8 parts of antioxidant, 3-4 parts of surfactant, 10-15 parts of polyol, and 35-38 parts of color powder.

[0008] As a preferred technical solution, the polyether-modified silicone oil is a mixture of hydrogen-containing silicone oil (hydrogen content of 3.5wt%-4.5wt%), polyether (hydroxyl group of 50-200mgKOH / g, acid value ≤0.15mgKOH / g), vinyl trimethoxysilane (density of 0.970±0.01g / cm 3 ) to react to obtain.

[0009] As a preferred technical solution, the preparation method of the polyether-modified silicone oil comprises at least the following steps: in a nitrogen atmosphere, at a temperature of 70-85°C and a pressure of 100-120 Pa, hydrogen-containing silicone oil (hydrogen content of 3.5wt%-4.5wt%), polyether (hydroxyl group of 50-200mgKOH / g, acid value ≤0.15mgKOH / g), vinyl trimethoxysilane (density of 0.970±0.01g / cm 3 ) and react for 3.5-4h to obtain the hydrogen-containing silicone oil, polyether and vinyltrimethoxysilane in a mass ratio of 10-14:7-9:1-2.

[0010] As a preferred technical solution, the modified polyester polyol solution is a mixture of polybutylene terephthalate (melt index ≤5g / 10min, 2.16kg, 190°C, melting point range of 110-120°C), polyhexamethylene adipate (PBT), polyisobutylene adipate (PDI), and toluene; the mass ratio of polybutylene terephthalate (PTMEG), polyhexamethylene adipate (melt index ≤7g / 10min, 2.16kg, 190°C), polyisobutylene adipate (PDI), and toluene is 2-3:3-4:2-3:30-35.

[0011] As a preferred technical solution, the molecular weight of the polybutylene isoadipate is 600-10000.

[0012] As a preferred technical solution, the light stabilizer is light stabilizer BW-10LD.

[0013] As a preferred technical solution, the light stabilizer BW-10LD has a weight average molecular weight of 3100-4000.

[0014] As a preferred technical solution, the antioxidant is at least one of antioxidant 168 and antioxidant 1010.

[0015] As a preferred technical solution, the surfactant is castor oil polyoxyethylene ether, fatty alcohol polyoxyethylene ester, and a mixture of fatty alcohol polyoxyethylene ether, wherein the mass ratio of castor oil polyoxyethylene ether, fatty alcohol polyoxyethylene ester, and fatty alcohol polyoxyethylene ether is 1-2:2-3:1-2.

[0016] As a preferred technical solution, the polyol is at least one of pentaerythritol and 1,4-butanediol.

[0017] As a preferred technical solution, the color powder can be selected from at least one of: amaranth, carmine, erythrosine, new red, lemon yellow, sunset yellow, indigo yellow, brilliant blue, titanium dioxide, zinc oxide, and lithopone.

[0018] The second aspect of the present invention provides a method for preparing a color paste for polyurethane foam, comprising at least the following steps: Step S1: Weigh the modified polyester polyol solution, polyether modified silicone oil, light stabilizer, antioxidant, surfactant, polyol, and color powder respectively, put them into a mixing container, stir evenly, and stir for 1 hour to obtain a mixture 1; Step S2: Transfer the mixture 1 to a high-speed disperser and mix it again, then put it into a centrifugal sand mill for grinding. Grind it continuously for 6-7 hours, control the grinding temperature not higher than 45°C, and obtain a uniform mixture, that is, the color paste for polyurethane foam.

[0019] Beneficial Effects The modified polyester polyol solution, polyether modified silicone oil and color powder are added to the modified color paste, and the obtained modified color paste has good dispersion stability, uniform color paste state and no agglomeration phenomenon. When added to the polyurethane foam material, it has good compatibility with the material, good color stability and is not easy to change color. After long-term outdoor application and observation, no filler is precipitated, and the color difference change is small. The modified polyurethane foam material color paste has good fluidity and is easy to construct and color match. They can be directly used by stirring and mixing, which simplifies the production process, improves the construction efficiency and reduces the production cost. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1 A method for preparing a color paste for polyurethane foam cotton mainly comprises the following steps: 1. Preparation of polyether modified silicone oil: First, fill the mixer with nitrogen to replace the air, add hydrogen-containing silicone oil, polyether and vinyl trimethoxy silane into the mixer, wait until the temperature rises to 75°C, adjust the pressure to 110 Pa, start stirring, and react for 3.5 hours. The mass ratio of hydrogen-containing silicone oil, polyether and vinyl trimethoxy silane is 10:8:1, and polyether modified silicone oil is obtained.

[0022] The hydrogen-containing silicone oil (hydrogen content of 3.5wt%) was purchased from Jiashan Jiangnan Textile Materials Co., Ltd., brand JF-M22-26; polyether (hydroxyl value of 50mgKOH / g, acid value ≤0.15mgKOH / g) was purchased from Hangzhou Electrochemical Group Auxiliary Chemical Co., Ltd., brand polyether 330; vinyl trimethoxysilane (density of 0.970±0.01g / cm 3 ), purchased from Nanjing United Silicon Chemical, brand USi-401.

[0023] 2. Preparation of modified polyester polyol solution: polybutylene terephthalate, polyhexamethylene adipate, polybutylene isoadipate and toluene are stirred and mixed in a mixer, wherein the mass ratio of polybutylene terephthalate, polyhexamethylene adipate, polybutylene isoadipate and toluene is 2:3:3:30.

[0024] The polybutylene terephthalate (melt index ≤5g / 10min, 2.16kg, 190°C, melting point range of 110±2°C) was purchased from Shanghai Shunshi Plastic Co., Ltd. with the brand name DR51-1001, polyhexamethylene adipate (melt index ≤7g / 10min, 2.16kg, 190°C, weight average molecular weight 1000) was purchased from Shandong Baihong New Materials Co., Ltd. with the brand name Y005, and polyisobutylene adipate with a weight average molecular weight of 600 was purchased from Shanghai Hongzhuang Chemical Technology Co., Ltd. with the brand name HZ-003.

[0025] 3. Preparation of surfactant: Castor oil polyoxyethylene ether, fatty alcohol polyoxyethylene ester, and fatty alcohol polyoxyethylene ether are mixed and stirred, wherein the mass ratio of castor oil polyoxyethylene ether, fatty alcohol polyoxyethylene ester, and fatty alcohol polyoxyethylene ether is 2:3:1.

[0026] Castor oil polyoxyethylene ether was purchased from Jiangsu Hai'an Petrochemical Plant, brand: EL-10; fatty alcohol polyoxyethylene ester was purchased from Jiangsu Hai'an Petrochemical Plant, brand: EL-20; fatty alcohol polyoxyethylene ester was purchased from Jiangsu Hai'an Petrochemical Plant, brand: A-103.

[0027] According to mass proportion, 30 parts of modified polyester polyol solution, 0.5 parts of polyether modified silicone oil, 0.2 parts of light stabilizer BW-10LD, 0.3 parts of antioxidant 168, 3 parts of modified surfactant, 10 parts of pentaerythritol, and 35 parts of amaranth red powder are added to a mixing container and stirred evenly. After stirring for 1 hour, a mixture 1 is obtained; then the mixture 1 is transferred to a high-speed disperser for further mixing, and then put into a centrifugal sand mill for grinding. The grinding is continued for 7 hours, and the grinding temperature is controlled at 40°C to obtain a uniform mixture, that is, a color paste for polyurethane foam.

[0028] Example 2 A method for preparing a color paste for polyurethane foam cotton mainly comprises the following steps: 1. Preparation of polyether modified silicone oil: First, fill the mixer with nitrogen to replace the air, take hydrogenated silicone oil, polyether and vinyltrimethoxysilane and add them to the mixer, wait until the temperature rises to 75°C, adjust the pressure to 110Pa, start stirring, and react for 3.5h. The mass ratio of hydrogenated silicone oil, polyether and vinyltrimethoxysilane is 10:8:1, and polyether modified silicone oil can be obtained.

[0029] The hydrogen-containing silicone oil (hydrogen content of 3.5wt%) used was purchased from Jiashan Jiangnan Textile Materials Co., Ltd. with the brand name JF-M22-26; the polyether (hydroxyl group is 50mgKOH / g, acid value ≤0.15mgKOH / g) was purchased from Hangzhou Electrochemical Group Auxiliary Chemical Co., Ltd. with the brand name polyether 330; and the vinyl trimethoxysilane (density is 0.970±0.01g / cm3) was purchased from Nanjing United Silicon Chemical with the brand name USi-401.

[0030] 2. Preparation of polyester polyol solution: polybutylene terephthalate, polyhexamethylene adipate, polybutylene isoadipate and toluene are stirred and mixed in a mixer, wherein the mass ratio of polybutylene terephthalate, polyhexamethylene adipate, polybutylene isoadipate and toluene is 2:3:3:30.

[0031] The polybutylene terephthalate (melt index ≤5g / 10min, 2.16kg, 190°C, melting point range of 110±2°C) was purchased from Shanghai Shunshi Plastic Co., Ltd. with the brand name DR51-1001, polyhexamethylene adipate (melt index ≤7g / 10min, 2.16kg, 190°C, weight average molecular weight 1000) was purchased from Shandong Baihong New Materials Co., Ltd. with the brand name Y005, and polyisobutylene adipate with a weight average molecular weight of 600 was purchased from Shanghai Hongzhuang Chemical Technology Co., Ltd. with the brand name HZ-003.

[0032] 3. Preparation of surfactant: Castor oil polyoxyethylene ether, fatty alcohol polyoxyethylene ester, and fatty alcohol polyoxyethylene ether are mixed and stirred, wherein the mass ratio of castor oil polyoxyethylene ether, fatty alcohol polyoxyethylene ester, and fatty alcohol polyoxyethylene ether is 2:3:1.

[0033] Castor oil polyoxyethylene ether was purchased from Jiangsu Hai'an Petrochemical Plant, brand: EL-10; fatty alcohol polyoxyethylene ester was purchased from Jiangsu Hai'an Petrochemical Plant, brand: EL-20; fatty alcohol polyoxyethylene ester was purchased from Jiangsu Hai'an Petrochemical Plant, brand: A-103.

[0034] 40 parts by mass of modified polyester polyol solution, 1.5 parts by mass of polyether modified silicone oil, 0.6 parts by mass of light stabilizer BW-10LD, 0.8 parts by mass of antioxidant 168, 4 parts by mass of modified surfactant, 10 parts by mass of pentaerythritol and 35 parts by mass of amaranth red powder were added to a mixing container and stirred evenly. After stirring for 1 hour, a mixture 1 was obtained. The mixture 1 was then transferred to a high-speed disperser for further mixing, and then placed in a centrifugal sand mill for grinding. The grinding was continued for 7 hours, and the grinding temperature was controlled at 40°C to obtain a uniform mixture, that is, a color paste for polyurethane foam.

[0035] Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that the preparation methods of the polyether-modified silicone oil and the modified polyester polyol solution are different, and the rest are the same as Example 1. The polyether-modified silicone oil and the modified polyester polyol solution in this example are: 1. Preparation of polyether modified silicone oil: First, fill the mixer with nitrogen to replace the air, add hydrogenated silicone oil, polyether and vinyltrimethoxysilane into the mixer, wait until the temperature rises to 75°C, adjust the pressure to 110Pa, start stirring, and react for 3.5h. The mass ratio of hydrogenated silicone oil, polyether and vinyltrimethoxysilane is 10:8:5, and polyether modified silicone oil is obtained.

[0036] 2. Preparation of modified polyester polyol solution: poly(hexamethylene adipate), poly(butylene isoadipate) and toluene are stirred and mixed in a mixer, wherein the mass ratio of poly(hexamethylene adipate), poly(butylene isoadipate) and toluene is 3:3:30.

[0037] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that the preparation methods of the polyether-modified silicone oil and the modified polyester polyol solution are different, and the rest are the same as Example 1. The polyether-modified silicone oil and the modified polyester polyol solution in this example are: 1. Preparation of polyether modified silicone oil: First, fill the mixer with nitrogen to replace the air, add hydrogen-containing silicone oil, polyether and vinyl trimethoxy silane into the mixer, wait until the temperature rises to 75°C, adjust the pressure to 110Pa, start stirring, and react for 3.5 hours. The mass ratio of hydrogen-containing silicone oil, polyether and vinyl trimethoxy silane is 5:8:1, and polyether modified silicone oil is obtained.

[0038] 2. Preparation of modified polyester polyol solution: polybutylene terephthalate, polyhexamethylene adipate, polybutylene isoadipate and toluene are stirred and mixed in a mixer, wherein the mass ratio of polybutylene terephthalate, polyhexamethylene adipate, polybutylene isoadipate and toluene is 2:3:3:10.

[0039] Comparative Example 3 The difference between Comparative Example 3 and Example 1 is that the preparation methods of the polyether-modified silicone oil and the modified polyester polyol solution are different, and the rest are the same as Example 1. The polyether-modified silicone oil and the modified polyester polyol solution in this example are: 1. Preparation of polyether modified silicone oil: First, fill the mixer with nitrogen to replace the air, add hydrogen-containing silicone oil, polyether and vinyl trimethoxy silane into the mixer, wait until the temperature rises to 75°C, adjust the pressure to 110 Pa, start stirring, and react for 3.5 hours. The mass ratio of hydrogen-containing silicone oil, polyether and vinyl trimethoxy silane is 10:8:1, and polyether modified silicone oil is obtained.

[0040] The hydrogen-containing silicone oil (hydrogen content of 0.18 wt%) used was purchased from Jinan Longcheng Silicone Co., Ltd., brand LCG-01.

[0041] 2. Preparation of modified polyester polyol solution: poly(hexamethylene adipate), poly(butylene isoadipate) and toluene are stirred and mixed in a mixer, wherein the mass ratio of poly(hexamethylene adipate), poly(butylene isoadipate) and toluene is 3:3:30.

[0042] Comparative Example 4 The difference between Comparative Example 4 and Example 1 is that the polyether-modified silicone oil and the modified polyester polyol solution are different, and the rest are the same as Example 1. The polyether-modified silicone oil and the modified polyester polyol solution in this example are: 1. Preparation of polyether modified silicone oil: First, fill the mixer with nitrogen to replace the air, take hydrogen-containing silicone oil, polyether, vinyl trimethoxy silane and dimethyl silicone oil and add them to the mixer. Wait until the temperature rises to 75°C, adjust the pressure to 110Pa, start stirring, and react for 3.5 hours. The mass ratio of hydrogen-containing silicone oil, polyether, vinyl trimethoxy silane and dimethyl silicone oil is 10:8:5:5, and polyether modified silicone oil is obtained.

[0043] The flash point of the dimethyl silicone oil is 155° C., measured according to the open cup method in HG / T 2366-92. The dimethyl silicone oil was purchased from Jinan Longcheng Organic Silicone Co., Ltd., with the brand name LCG-201.

[0044] 2. Preparation of modified polyester polyol solution: poly(hexamethylene adipate), poly(butylene isoadipate) and toluene are stirred and mixed in a mixer, wherein the mass ratio of poly(hexamethylene adipate), poly(butylene isoadipate) and toluene is 3:3:30.

[0045] Comparative Example 5 The difference between Comparative Example 5 and Example 1 is that the preparation methods of the polyether-modified silicone oil and the modified polyester polyol solution are different, and the rest are the same as Example 1. The polyether-modified silicone oil in this example is an unmodified hydrogen-containing silicone oil. The hydrogen-containing silicone oil (hydrogen content is 3.5wt%) is purchased from Jiashan Jiangnan Textile Materials Co., Ltd., brand JF-M22-26; 2. Preparation of modified polyester polyol solution: poly(hexamethylene adipate), poly(butylene isoadipate) and toluene are stirred and mixed in a mixer, wherein the mass ratio of poly(hexamethylene adipate), poly(butylene isoadipate) and toluene is 3:3:30.

[0046] Comparative Example 6 The difference between Comparative Example 6 and Example 1 is that the preparation methods of the polyether-modified silicone oil and the modified polyester polyol solution are different, and the rest are the same as Example 1. In this example, unmodified hydrogenated silicone oil is used instead of the polyether-modified silicone oil, and the hydrogenated silicone oil (hydrogen content is 3.5wt%) used is purchased from Jiashan Jiangnan Textile Materials Co., Ltd., brand JF-M22-26; in this example, polyhexamethylene adipate is used instead of the modified polyester polyol solution.

[0047] Performance Testing The color pastes obtained in Examples 1-2 and Comparative Examples 1-6 were tested for stability by referring to the method in GB / T 6753.3-1986. After centrifugation at 3000 r / min for 15 min, the color pastes were allowed to stand for 1 h to observe whether there was sedimentation. At the same time, the yellowing resistance of the color pastes was tested using an ultraviolet accelerated aging test equipment, model: HE-NK-150. The viscosity of the color paste was tested using the national standard GB / T 1723-1993.

[0048]

[0049] It can be seen from the above table that the color pastes prepared in Example 1 and Example 2 have better stability.

[0050] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A color paste for polyurethane foam, characterized in that: It contains at least the following components by mass: 30-40 parts of modified polyester polyol solution, 0.5-1.5 parts of polyether modified silicone oil, 0.2-0.6 parts of light stabilizer, 0.3-0.8 parts of antioxidant, 3-4 parts of surfactant, 10-15 parts of polyol, and 35-38 parts of color powder.

2. The color paste for polyurethane foam according to claim 1, characterized in that: The polyether-modified silicone oil is obtained by reacting hydrogen-containing silicone oil, polyether and vinyltrimethoxysilane.

3. The color paste for polyurethane foam according to claim 2, characterized in that: The preparation method of the polyether-modified silicone oil at least comprises the following steps: in a nitrogen atmosphere, at a temperature of 70-85°C and a pressure of 100-120Pa, hydrogen-containing silicone oil, polyether and vinyl trimethoxysilane are mixed and reacted for 3.5-4h, and the mass ratio of the hydrogen-containing silicone oil, polyether and vinyl trimethoxysilane is 10-14:7-9:1-2; the hydrogen content of the hydrogen-containing silicone oil is 3.5wt%-4.5wt%, the hydroxyl group of the polyether is 50-200mgKOH / g, the acid value is ≤0.15mgKOH / g, and the density of the vinyl trimethoxysilane is 0.970±0.01g / cm 3 .

4. The color paste for polyurethane foam according to claim 1, characterized in that: The modified polyester polyol solution is a mixture of polybutylene terephthalate, polyhexamethylene adipate, polybutylene isoadipate and toluene; the mass ratio of polybutylene terephthalate, polyhexamethylene adipate, polybutylene isoadipate and toluene is 2-3:3-4:2-3:30-35; the melting index of the polybutylene terephthalate is ≤5g / 10min, 2.16kg, 190°C, and the melting point range is 110-120°C; the melting index of the polyhexamethylene adipate is ≤7g / 10min, 2.16kg, 190°C.

5. The color paste for polyurethane foam according to claim 1, characterized in that: The light stabilizer is light stabilizer BW-10LD, and the weight average molecular weight is 3100-4000.

6. The color paste for polyurethane foam according to claim 1, characterized in that: The antioxidant is at least one of antioxidant 168 and antioxidant 1010.

7. The color paste for polyurethane foam according to claim 1, characterized in that: The surfactant is castor oil polyoxyethylene ether, fatty alcohol polyoxyethylene ester, and a mixture of fatty alcohol polyoxyethylene ether, wherein the mass ratio of castor oil polyoxyethylene ether, fatty alcohol polyoxyethylene ester, and fatty alcohol polyoxyethylene ether is 1-2:2-3:1-2.

8. The color paste for polyurethane foam according to claim 1, characterized in that: The polyol is at least one of pentaerythritol and 1,4-butanediol.

9. The color paste for polyurethane foam according to claim 1, characterized in that: The color powder is at least one of amaranth, carmine, erythrosine, new red, lemon yellow, sunset yellow, indigo yellow, brilliant blue, titanium dioxide, zinc oxide, and lithopone.

10. A method for preparing the color paste for polyurethane foam cotton according to any one of claims 1 to 9, characterized in that: At least the following steps are included: Step S1: Weigh the modified polyester polyol solution, polyether modified silicone oil, light stabilizer, antioxidant, surfactant, polyol, and color powder components respectively, put them into a mixing container, stir them evenly, and stir for 1 hour to obtain a mixture 1; Step S2: Transfer the mixture 1 to a high-speed disperser and mix it again, then put it into a centrifugal sand mill for grinding. Grind it continuously for 6-7 hours, control the grinding temperature not higher than 45°C, and obtain a uniform mixture, that is, the color paste for polyurethane foam.

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