CN113969109A - Leather polishing and repairing paste and preparation method and application thereof - Google Patents
Leather polishing and repairing paste and preparation method and application thereof Download PDFInfo
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- CN113969109A CN113969109A CN202111297368.5A CN202111297368A CN113969109A CN 113969109 A CN113969109 A CN 113969109A CN 202111297368 A CN202111297368 A CN 202111297368A CN 113969109 A CN113969109 A CN 113969109A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09G—POLISHING COMPOSITIONS; SKI WAXES
- C09G1/00—Polishing compositions
- C09G1/06—Other polishing compositions
- C09G1/08—Other polishing compositions based on wax
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C11/00—Surface finishing of leather
- C14C11/003—Surface finishing of leather using macromolecular compounds
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention discloses a leather polishing mending paste, a preparation method and application thereof, relates to the technical field of leather chemical industry, and solves the problems that the polishing mending paste in the prior art has hollow microspheres or foaming powder with larger particle size, and pores are easy to block while mending, so that the quality of leather embryos is influenced. The leather polishing mending paste comprises the following raw materials in parts by weight: 20-50 parts of polyurethane polymer, 20-50 parts of nonionic polyurethane, 50-100 parts of polishing wax emulsion, 5-10 parts of rheological additive, 0.2-0.5 part of preservative and 30-50 parts of deionized water; the viscosity of the leather polishing mending paste is 15000-20000 mPa.s, and the solid content is 18-22%; the solid content of the polyurethane polymer is 30-35%, and the particle size of the polyurethane polymer is 4-6 microns; the solid content of the nonionic polyurethane is 20-25%, and the particle size of the nonionic polyurethane is 1-2 microns; the solid content of the polishing wax emulsion is 15-20%. The mending paste is applied to the full grain leather disability treatment, can play a good role in mending, can keep pores clear, and cannot cause other negative effects on leather.
Description
Technical Field
The invention relates to the technical field of leather chemical industry, in particular to a leather polishing mending paste and a preparation method and application thereof.
Background
The repairing of leather is an important component of leather surface finishing technology, and the aims of making the leather beautiful and improving the grade are achieved by using repairing paste and the like to cover and modify pores, sand holes, rotten surfaces and the like of the leather. Along with the improvement of the living quality of people, the requirements on leather products are higher and higher, so that the high-quality repairing paste is urgently needed to carry out finishing treatment on the inherent disabilities of the leather, and the purpose of improving the leather grade is achieved.
The prior mending paste usually needs buffing treatment after mending and is not suitable for treating fine wounds of full grain leather. The patent with the application numbers of CN201210169725.4 and CN201711320885.3 provides two solutions for the full grain leather polishing repair paste, but the polishing repair paste has hollow microspheres or foaming powder, the particle size of the hollow microspheres is large, pores are easily blocked while repairing, and the quality of leather embryos is affected.
Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a repair paste suitable for treating fine damage of full grain leather and a preparation method thereof.
Disclosure of Invention
One of the purposes of the invention is to provide a leather polishing mending paste and a preparation method and application thereof, which solve the technical problems that the prior polishing mending paste has hollow microspheres or foaming powder with larger particle size, and pores are easy to block while mending, so that the quality of leather blanks is influenced. The various technical effects that can be produced by the preferred technical solution of the present invention are described in detail below.
In order to achieve the purpose, the invention provides the following technical scheme:
the leather polishing mending paste comprises the following raw materials in parts by weight: 20-50 parts of polyurethane polymer, 20-50 parts of nonionic polyurethane, 50-100 parts of polishing wax emulsion, 5-10 parts of rheological additive, 0.2-0.5 part of preservative and 30-50 parts of deionized water; wherein the viscosity of the leather polishing mending paste is 15000-20000 mPa.s, and the solid content is 18-22%; the solid content of the polyurethane polymer is 30-35%, and the particle size of the polyurethane polymer is 4-6 microns; the solid content of the nonionic polyurethane is 20-25%, and the particle size of the nonionic polyurethane is 1-2 microns; the solid content of the polishing wax emulsion is 15-20%.
According to a preferred embodiment, the polyurethane polymer comprises the following components in parts by weight: 30-60 parts of diisocyanate, 20-50 parts of polyester polyol, 20-50 parts of polyether polyol, 20-40 parts of dimethylolpropionic acid, 3-15 parts of chain extender, 0.01-0.02 part of catalyst, 10-30 parts of diluent and 200-400 parts of deionized water, wherein the catalyst is a carboxylic acid organic metal compound.
According to a preferred embodiment, the non-ionic polyurethane comprises the following components in parts by weight: 30-60 parts of diisocyanate, 30-60 parts of nonionic polyol, 3-10 parts of chain extender, 0.01-0.02 part of catalyst, 10-30 parts of diluent, 0.1-0.5 part of nonionic emulsifier and 200-400 parts of deionized water, wherein the catalyst is a carboxylic acid organic metal compound, and the nonionic emulsifier is fatty alcohol-polyoxyethylene ether.
According to a preferred embodiment, the polishing wax emulsion comprises the following components in parts by weight: 3-8 parts of beeswax, 5-10 parts of palm wax, 1-2 parts of stearic acid, 1-3 parts of fatty alcohol-polyoxyethylene ether, 1-3 parts of hexadecyl trimethyl ammonium bromide and 80-90 parts of deionized water.
According to a preferred embodiment, the rheology auxiliary agent is one or more of associative rheology modifiers; the preservative is one or more of carvone preservatives and oxazoline preservatives.
The preparation method of the leather polishing mending paste provided by any technical scheme of the invention comprises the following steps: under the stirring state, sequentially adding metered deionized water, a preservative, polishing wax emulsion, a polyurethane polymer and nonionic polyurethane, stirring for 30 minutes, uniformly mixing, adding a rheological additive to adjust the viscosity to 15000-20000 mPa.s, and obtaining the leather polishing mending paste with the solid content of 18-22%.
According to a preferred embodiment, the process for the preparation of the polyurethane polymer comprises the following steps: adding metered pre-dried diisocyanate, polyester polyol, dimethylolpropionic acid, polyether polyol and a catalyst into a reaction container, heating to 80 ℃ under continuous stirring, reacting for 30-60 minutes under the vacuum degree of 0.07-0.09 MPa, introducing nitrogen to remove vacuum, adding metered diluent and chain extender, stirring for 30 minutes at 80 ℃, cooling to 40 ℃, adding triethylamine for neutralization, adding deionized water, and dispersing to obtain polyurethane polymer emulsion with the solid content of 30-35% and the particle size of 4-6 microns.
According to a preferred embodiment, the process for the preparation of the non-ionic polyurethane comprises the following steps: adding metered predried diisocyanate, nonionic polyol and catalyst into a reaction container, heating to 70 ℃ under continuous stirring, reacting for 60-90 minutes under the vacuum degree of 0.07-0.09 MPa, introducing nitrogen to remove the vacuum, adding metered diluent and chain extender, stirring for 120 minutes at 70 ℃, cooling to 40 ℃, adding into a prepared emulsifier deionized water solution, and quickly stirring to obtain the nonionic polyurethane emulsion with the solid content of 20-25% and the particle size of 1-2 microns.
According to a preferred embodiment, the method of preparing the polishing wax emulsion comprises the steps of: adding metered beeswax into a reaction container, heating to 60-65 ℃, starting stirring to completely dissolve the beeswax, adding palm wax and stearic acid, heating to 80-85 ℃, adding fatty alcohol-polyoxyethylene ether and cetyl trimethyl ammonium bromide after completely dissolving the beeswax, keeping the temperature and stirring for 30 minutes, adding boiling water under a high-speed stirring state, keeping high-speed dispersion for 30 minutes, reducing the rotating speed and cooling to room temperature to obtain the polishing wax emulsion with the solid content of 15-20%.
The leather polishing and mending paste provided by any technical scheme of the invention is applied to full grain leather disability treatment.
The leather polishing mending paste and the preparation method and application thereof provided by the invention have at least the following beneficial technical effects:
the leather polishing repair paste comprises a polyurethane polymer, nonionic polyurethane, polishing wax emulsion, a rheological additive, a preservative and deionized water, wherein the particle size of the polyurethane polymer is 4-6 micrometers, and the particle size of the nonionic polyurethane is 1-2 micrometers.
The preparation method of the leather polishing mending paste can prepare the polishing mending paste suitable for the full grain leather disability treatment, is suitable for industrial production, and has stable batch.
The leather polishing and mending paste provided by the invention is applied to the full grain leather disability treatment, can play a good role in repairing, can keep pores clear, and cannot cause other negative effects on leather.
The leather polishing mending paste and the preparation method and application thereof solve the technical problems that the polishing mending paste in the prior art has hollow microspheres or foaming powder with larger particle size, and pores are easy to block while mending, so that the quality of leather blanks is influenced.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The leather polishing and mending paste of the present invention, and the preparation method and application thereof will be described in detail below with reference to examples 1 to 3.
Example 1
This example describes the leather polishing and mending paste of the present invention in detail.
The leather polishing mending paste comprises the following raw materials in parts by weight: 20-50 parts of polyurethane polymer, 20-50 parts of nonionic polyurethane, 50-100 parts of polishing wax emulsion, 5-10 parts of rheological additive, 0.2-0.5 part of preservative and 30-50 parts of deionized water. Preferably, the viscosity of the leather polishing mending paste is 15000-20000 mPa.s, and the solid content is 18-22%. Preferably, the solid content of the polyurethane polymer is 30-35%, and the particle size of the polyurethane polymer is 4-6 microns. Preferably, the solid content of the nonionic polyurethane is 20-25%, and the particle size of the nonionic polyurethane is 1-2 microns. Preferably, the solid content of the polishing wax emulsion is 15-20%. The leather polishing mending paste of the embodiment is white to beige flowing paste in appearance, and the pH value is 5-7.
The leather polishing mending paste comprises a polyurethane polymer, nonionic polyurethane, a polishing wax emulsion, a rheological additive, a preservative and deionized water, wherein the particle size of the polyurethane polymer is 4-6 micrometers, and the particle size of the nonionic polyurethane is 1-2 micrometers. Namely, the leather polishing mending paste of the embodiment solves the technical problems that the polishing mending paste in the prior art has hollow microspheres or foaming powder, has large particle size, and is easy to block pores and influence the quality of leather blanks while mending.
According to a preferred embodiment, the polyurethane polymer comprises the following components in parts by weight: 30-60 parts of diisocyanate, 20-50 parts of polyester polyol, 20-50 parts of polyether polyol, 20-40 parts of dimethylolpropionic acid, 3-15 parts of chain extender, 0.01-0.02 part of catalyst, 10-30 parts of diluent and 200-400 parts of deionized water, wherein the catalyst is a carboxylic acid organic metal compound.
According to a preferred embodiment, the non-ionic polyurethane comprises the following components in parts by weight: 30-60 parts of diisocyanate, 30-60 parts of nonionic polyol, 3-10 parts of chain extender, 0.01-0.02 part of catalyst, 10-30 parts of diluent, 0.1-0.5 part of nonionic emulsifier and 200-400 parts of deionized water, wherein the catalyst is a carboxylic acid organic metal compound, and the nonionic emulsifier is fatty alcohol-polyoxyethylene ether.
According to a preferred embodiment, the polishing wax emulsion comprises the following components in parts by weight: 3-8 parts of beeswax, 5-10 parts of palm wax, 1-2 parts of stearic acid, 1-3 parts of fatty alcohol-polyoxyethylene ether, 1-3 parts of hexadecyl trimethyl ammonium bromide and 80-90 parts of deionized water.
According to a preferred embodiment, the rheology auxiliary agent is one or more of associative rheology modifiers. The antiseptic is one or more of Carpine and oxazoline antiseptic. Without being limited thereto, the remaining types of rheology auxiliaries and preservatives can be used.
The leather polishing mending paste is mainly used for treating fine damage of full-grain leather, can effectively improve the quality of the leather, and is good in stability.
Example 2
This example describes the preparation method of the leather polishing and mending paste of the present invention in detail.
The preparation method of the leather polishing mending paste according to any one of the technical schemes in the embodiment 1 comprises the following steps: under the stirring state, sequentially adding metered deionized water, a preservative, polishing wax emulsion, a polyurethane polymer and nonionic polyurethane, stirring for 30 minutes, uniformly mixing, adding a rheological additive to adjust the viscosity to 15000-20000 mPa.s, and obtaining the leather polishing mending paste with the solid content of 18-22%.
The preparation method of the leather polishing repair paste provided by the embodiment can be used for preparing the polishing repair paste suitable for full grain leather residue treatment, and is suitable for industrial production and stable in batch. The preparation method of the leather polishing mending paste solves the technical problems that the polishing mending paste in the prior art has hollow microspheres or foaming powder with large particle size, pores are easy to block while mending, and the quality of leather blanks is affected.
According to a preferred embodiment, the process for the preparation of the polyurethane polymer comprises the following steps: adding metered pre-dried diisocyanate, polyester polyol, dimethylolpropionic acid, polyether polyol and a catalyst into a reaction container, heating to 80 ℃ under continuous stirring, reacting for 30-60 minutes under the vacuum degree of 0.07-0.09 MPa, introducing nitrogen to remove vacuum, adding metered diluent and chain extender, stirring for 30 minutes at 80 ℃, cooling to 40 ℃, adding triethylamine for neutralization, adding deionized water, and dispersing to obtain polyurethane polymer emulsion with the solid content of 30-35% and the particle size of 4-6 microns.
According to a preferred embodiment, the process for the preparation of the non-ionic polyurethane comprises the following steps: adding metered predried diisocyanate, nonionic polyol and catalyst into a reaction container, heating to 70 ℃ under continuous stirring, reacting for 60-90 minutes under the vacuum degree of 0.07-0.09 MPa, introducing nitrogen to remove the vacuum, adding metered diluent and chain extender, stirring for 120 minutes at 70 ℃, cooling to 40 ℃, adding into a prepared emulsifier deionized water solution, and quickly stirring to obtain the nonionic polyurethane emulsion with the solid content of 20-25% and the particle size of 1-2 microns.
According to a preferred embodiment, the method of preparing the polishing wax emulsion comprises the steps of: adding metered beeswax into a reaction container, heating to 60-65 ℃, starting stirring to completely dissolve the beeswax, adding palm wax and stearic acid, heating to 80-85 ℃, adding fatty alcohol-polyoxyethylene ether and cetyl trimethyl ammonium bromide after completely dissolving the beeswax, keeping the temperature and stirring for 30 minutes, adding boiling water under a high-speed stirring state, keeping high-speed dispersion for 30 minutes, reducing the rotating speed and cooling to room temperature to obtain the polishing wax emulsion with the solid content of 15-20%.
In the embodiment, the self-made polyurethane polymer, the nonionic polyurethane and the polishing wax emulsion are used, so that the leather polishing and repairing paste for treating fine damage of full-grain leather can be prepared, and the quality of the leather can be improved.
Example 3
This example describes in detail the application of the leather polishing and mending paste of the present invention.
The leather polishing and mending paste according to any one of the technical schemes in the embodiment 1 can be applied to full grain leather residue treatment. For example, the leather polishing and mending paste of any one of the embodiments 1 can be used for small injuries such as tabanus and needle holes of full grain leather.
The leather polishing mending paste of any one of the technical schemes in the embodiment 1 is applied to the full-grain leather disability treatment, can play a good repairing role, can keep pores clear, cannot cause other negative effects on leather, and avoids the technical problems that the polishing mending paste in the prior art has hollow microspheres or foaming powder, has large particle size, is easy to block the pores during mending and influences the quality of leather blanks.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The leather polishing and repairing paste is characterized by comprising the following raw materials in parts by weight: 20-50 parts of polyurethane polymer, 20-50 parts of nonionic polyurethane, 50-100 parts of polishing wax emulsion, 5-10 parts of rheological additive, 0.2-0.5 part of preservative and 30-50 parts of deionized water; wherein the content of the first and second substances,
the viscosity of the leather polishing mending paste is 15000-20000 mPa.s, and the solid content is 18-22%; the solid content of the polyurethane polymer is 30-35%, and the particle size of the polyurethane polymer is 4-6 microns; the solid content of the nonionic polyurethane is 20-25%, and the particle size of the nonionic polyurethane is 1-2 microns; the solid content of the polishing wax emulsion is 15-20%.
2. The leather polishing and mending paste of claim 1, wherein the polyurethane polymer comprises the following components in parts by weight: 30-60 parts of diisocyanate, 20-50 parts of polyester polyol, 20-50 parts of polyether polyol, 20-40 parts of dimethylolpropionic acid, 3-15 parts of chain extender, 0.01-0.02 part of catalyst, 10-30 parts of diluent and 200-400 parts of deionized water, wherein the catalyst is a carboxylic acid organic metal compound.
3. The leather polishing mending paste of claim 1, wherein the nonionic polyurethane comprises the following components in parts by weight: 30-60 parts of diisocyanate, 30-60 parts of nonionic polyol, 3-10 parts of chain extender, 0.01-0.02 part of catalyst, 10-30 parts of diluent, 0.1-0.5 part of nonionic emulsifier and 200-400 parts of deionized water, wherein the catalyst is a carboxylic acid organic metal compound, and the nonionic emulsifier is fatty alcohol-polyoxyethylene ether.
4. The leather polishing mending paste of claim 1, wherein the polishing wax emulsion comprises the following components in parts by weight: 3-8 parts of beeswax, 5-10 parts of palm wax, 1-2 parts of stearic acid, 1-3 parts of fatty alcohol-polyoxyethylene ether, 1-3 parts of hexadecyl trimethyl ammonium bromide and 80-90 parts of deionized water.
5. The leather polishing mending paste of claim 1, wherein the rheology assistant is one or more of associative rheology modifiers; the preservative is one or more of carvone preservatives and oxazoline preservatives.
6. A method for preparing the leather polishing and mending paste of any one of claims 1 to 5, comprising the steps of: under the stirring state, sequentially adding metered deionized water, a preservative, polishing wax emulsion, a polyurethane polymer and nonionic polyurethane, stirring for 30 minutes, uniformly mixing, adding a rheological additive to adjust the viscosity to 15000-20000 mPa.s, and obtaining the leather polishing mending paste with the solid content of 18-22%.
7. The method for preparing leather polishing and mending paste according to claim 6, wherein the method for preparing the polyurethane polymer comprises the following steps: adding metered pre-dried diisocyanate, polyester polyol, dimethylolpropionic acid, polyether polyol and a catalyst into a reaction container, heating to 80 ℃ under continuous stirring, reacting for 30-60 minutes under the vacuum degree of 0.07-0.09 MPa, introducing nitrogen to remove vacuum, adding metered diluent and chain extender, stirring for 30 minutes at 80 ℃, cooling to 40 ℃, adding triethylamine for neutralization, adding deionized water, and dispersing to obtain polyurethane polymer emulsion with the solid content of 30-35% and the particle size of 4-6 microns.
8. The method for preparing a leather polishing and mending paste according to claim 6, wherein the method for preparing the nonionic polyurethane comprises the following steps: adding metered predried diisocyanate, nonionic polyol and catalyst into a reaction container, heating to 70 ℃ under continuous stirring, reacting for 60-90 minutes under the vacuum degree of 0.07-0.09 MPa, introducing nitrogen to remove the vacuum, adding metered diluent and chain extender, stirring for 120 minutes at 70 ℃, cooling to 40 ℃, adding into a prepared emulsifier deionized water solution, and quickly stirring to obtain the nonionic polyurethane emulsion with the solid content of 20-25% and the particle size of 1-2 microns.
9. The method for preparing a leather polishing and mending paste according to claim 6, wherein the method for preparing the polishing wax emulsion comprises the following steps: adding metered beeswax into a reaction container, heating to 60-65 ℃, starting stirring to completely dissolve the beeswax, adding palm wax and stearic acid, heating to 80-85 ℃, adding fatty alcohol-polyoxyethylene ether and cetyl trimethyl ammonium bromide after completely dissolving the beeswax, keeping the temperature and stirring for 30 minutes, adding boiling water under a high-speed stirring state, keeping high-speed dispersion for 30 minutes, reducing the rotating speed and cooling to room temperature to obtain the polishing wax emulsion with the solid content of 15-20%.
10. Use of the leather polishing and mending paste of any one of claims 1 to 5 in full grain leather finishing.
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| CN202111297368.5A CN113969109A (en) | 2021-11-04 | 2021-11-04 | Leather polishing and repairing paste and preparation method and application thereof |
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| CN202111297368.5A CN113969109A (en) | 2021-11-04 | 2021-11-04 | Leather polishing and repairing paste and preparation method and application thereof |
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