CN113150241A - Polyurethane resin for anti-doodling leather and preparation method thereof - Google Patents

Polyurethane resin for anti-doodling leather and preparation method thereof Download PDF

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CN113150241A
CN113150241A CN202110268904.2A CN202110268904A CN113150241A CN 113150241 A CN113150241 A CN 113150241A CN 202110268904 A CN202110268904 A CN 202110268904A CN 113150241 A CN113150241 A CN 113150241A
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polyurethane resin
leather
reaction
doodling
isocyanate
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王元有
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Yangzhou Polytechnic Institute
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Yangzhou Polytechnic Institute
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/2805—Compounds having only one group containing active hydrogen
    • C08G18/288—Compounds containing at least one heteroatom other than oxygen or nitrogen
    • C08G18/289—Compounds containing at least one heteroatom other than oxygen or nitrogen containing silicon
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
    • C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
    • C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
    • C08G18/4266—Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones
    • C08G18/4283—Hydroxycarboxylic acid or ester
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
    • C08G18/6633—Compounds of group C08G18/42
    • C08G18/6637—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/664—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
    • C08G18/6633—Compounds of group C08G18/42
    • C08G18/6637—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/6648—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3225 or C08G18/3271 and/or polyamines of C08G18/38
    • C08G18/6655—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3225 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3271
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
    • C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
    • C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
    • C08G18/753—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
    • C08G18/755—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
    • C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
    • C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • D06N3/146—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes characterised by the macromolecular diols used

Abstract

The scheme relates to a polyurethane resin for anti-doodling leather and a preparation method thereof, wherein metered polyester polyol, an antioxidant and phosphoric acid are added into a reaction kettle, half amount of solvent DMF is added, the mixture is fully and uniformly stirred, then isocyanate is added, the R value is 0.3, and the reaction is carried out for 1.5 hours at 70 ℃; and adding a chain extender after the reaction is finished, continuously adding the residual amount of isocyanate after the mixture is fully and uniformly stirred, wherein the R value is 1, continuously stirring and reacting for 2 hours at 70 ℃, gradually adding the residual amount of DMF (dimethyl formamide) in the reaction process, stopping the reaction by using monohydroxy organosilicon, continuously stirring for 1.5 hours, and cooling and coating to obtain the scrawling-resistant polyurethane resin for leather. The polyurethane molecular chain with a more regular structure is prepared by adopting a two-step reaction method, and the method is simple to operate, high in economic value and easy for batch production; the prepared polyurethane resin has good durability, can be used for preparing wet-process bass, and has anti-graffiti performance.

Description

Polyurethane resin for anti-doodling leather and preparation method thereof
Technical Field
The invention belongs to the technical field of preparation of polyurethane resin for leather, and particularly relates to anti-doodling polyurethane resin for leather and preparation thereof.
Background
Leather products are sought after by people all the time, polyurethane synthetic leather has the characteristics of hand feeling, water resistance, moisture permeability, lines, service life, various styles and the like which are not inferior to natural leather, and meanwhile, the polyurethane synthetic leather has low price and greatly meets the consumption requirements of the common people.
Polyurethane synthetic leather can be classified into wet base, dry base and dry face. The wet-process bass is prepared by adding color paste, organic solvent, wood powder, calcium powder and the like into polyurethane resin, fully dispersing uniformly, defoaming, coating on the surface of leather base cloth, solidifying in a constant-temperature water bath, and washing and drying. Adding the dry-process fabric into the color chips and the solvent, stirring uniformly and defoaming fully, coating the mixture on the surface of release paper, drying the mixture in an oven, coating a layer of dry-process base material on the surface of the mixture, then attaching the wet-process base material, pressing the mixture, continuously drying the mixture, and stripping the mixture from the release paper to obtain the polyurethane synthetic leather.
With the improvement of the economic level, people pursue more and more aesthetic feeling and more strict requirements on the product quality, so that more and more requirements on leather products have scrawling resistance, and sweat, ball-point pen cores, pens and the like can not leave marks on the wet base.
Disclosure of Invention
Aiming at the problem that the polyurethane wet-process resin in the prior art cannot meet the requirement of scrawling resistance, the invention provides the preparation method of the polyurethane numerical value with the scrawling resistance, the method is simple and easy to operate, and the prepared resin is used for preparing the wet-process bass and has excellent scrawling resistance.
In order to achieve the purpose, the invention provides the following technical scheme:
a preparation method of polyurethane resin for anti-doodling leather comprises the following steps:
1) preparation of a prepolymer: adding metered polyester polyol, an antioxidant and phosphoric acid into a reaction kettle, adding half amount of solvent DMF, fully and uniformly stirring, then adding isocyanate, wherein the R value is 0.3, and reacting for 1.5h at 70 ℃;
2) synthesis of resin: adding a chain extender into the step 1), continuously adding the residual amount of isocyanate after fully and uniformly stirring, wherein the R value is 1, continuously stirring and reacting for 2 hours at 70 ℃, gradually adding the residual amount of solvent DMF during the reaction process, adding monohydroxy organosilicon into the reaction kettle after the reaction is finished to terminate the reaction, continuously stirring for 1.5 hours, and cooling and coating to obtain the doodle-resistant polyurethane resin for leather.
Further, the mass percentages of the polyester polyol, the antioxidant, the phosphoric acid, the isocyanate, the chain extender, the monohydroxy organosilicon and the solvent DMF are 15-22%, 1-3%, 1-2%, 4-8%, 1-4%, 1-3% and the balance being 100%.
Further, the polyester polyol is selected from one or any combination of PBA-4000, PEBA-4000, PHA-4000 and PHBA-4000.
Further, the isocyanate is selected from any one or two of toluene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate and dicyclohexylmethane diisocyanate.
Further, the chain extender is selected from one or two of monoethanolamine, diethanolamine, 1, 6-hexanediol, 1, 4-butanediol and ethylene glycol.
Further, the monohydroxy organosilicon is selected from any one or two combinations of anionic, cationic, nonionic and polyion monohydroxy organosilicon.
The invention provides the anti-doodling polyurethane resin for leather prepared by the preparation method.
The invention has the beneficial effects that: the polyurethane molecular chain with a more regular structure is prepared by adopting a two-step reaction method, and the method is simple to operate, high in economic value and easy for batch production; when the reaction is finished, monohydroxy organosilicon is used for replacing methanol to terminate the reaction, so that the terminal of the polyurethane resin structure is grafted with the organosilicon, and the defect of poor durability when the conventional organosilicon is added into the polyurethane resin is overcome. After the wet-process bass is prepared, the organic silicon and the polyurethane resin are separated, and the organic silicon in a reaction system emerges from the surface of the wet-process bass, so that the bass has the anti-doodling performance; and the polyurethane wet-process bass with the structure can not remove the organic silicon from the bass after being washed for many times, and the bass can still keep the scrawling resistance.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The preparation process comprises the following steps:
1) preparation of a prepolymer: adding metered polyester polyol, an antioxidant and phosphoric acid into a reaction kettle, adding half amount of solvent DMF, fully and uniformly stirring, then adding isocyanate, wherein the R value is 0.3, and reacting for 1.5h at 70 ℃;
2) synthesis of resin: adding a chain extender into the step 1), continuously adding the residual amount of isocyanate after fully and uniformly stirring, wherein the R value is 1, continuously stirring and reacting for 2 hours at 70 ℃, gradually adding the residual amount of solvent DMF during the reaction process, adding monohydroxy organosilicon into the reaction kettle after the reaction is finished to terminate the reaction, continuously stirring for 1.5 hours, and cooling and coating to obtain the doodle-resistant polyurethane resin for leather.
The specific amounts of each component are shown in table 1:
TABLE 1
Figure BDA0002973474090000041
The rest of the components in the above examples 1-4, such as antioxidant 1010 in an amount of 17g and phosphoric acid in an amount of 15g, were supplemented with DMF solvent to make up the system in an amount of 1500 g.
For comparison, comparative examples 1-4 were prepared by replacing the monohydroxysilicone in examples 1-4 above with methanol.
The resins obtained in examples 1-4 and comparative examples 1-4 had a viscosity of 20-24 cps/deg.C and a solids content of about 30%.
Performance evaluation:
the polyurethane resin synthesized as described above was prepared into wet base, and the appearance thereof was observed to evaluate compatibility, and physical properties such as graffiti resistance, peel strength, and the like were evaluated.
100g of the synthesized resin is weighed, 30g of wood powder, 1g of black paste and 50g of DMF (dimethyl formamide) solvent are added into the resin, and the mixture is uniformly dispersed at a high speed and then subjected to vacuum defoaming for later use. Soaking leather in 25% DMF water solution, taking out and pressing the leather to be spread on the surface of a glass plate after 30min, ironing the leather until a 150-filament feeler gauge is pressed on a semi-dry pad, pouring a little prepared slurry on the surface of the leather for blade coating after the leather is fully cooled, then tightly clamping the leather in a constant-temperature water bath by using a clamp, fully solidifying the leather for 10min, taking out the leather, and washing the leather by using a water pressing machine. The base cloth must be fully cooled before coating, and if the surface of the base cloth is not uniformly cooled, the hardness of the leather sample prepared has obvious difference, namely the hot area feels soft, and the cold area feels hard. The wet-process bass after water washing was placed in an oven to be dried, and tested for peel strength, and scratched with a ball-point pen on the surface of the bass to test the graffiti resistance.
TABLE 2
Figure BDA0002973474090000042
Figure BDA0002973474090000051
As shown in table 2, through the studies of the above examples 1 to 4 and comparative examples 1 to 4, the preparation method of the polyurethane resin for anti-graffiti leather of the present invention is indeed feasible, and the purpose of wet-process bass anti-graffiti property can be achieved. The table shows that the performance of each aspect in the embodiment 2 is better, the invention is feasible, the development of the resin for resisting the doodling polyurethane leather provides a powerful reference, and the invention has stronger economic benefit and environmental benefit.
While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.

Claims (7)

1. The preparation method of the polyurethane resin for the anti-doodling leather is characterized by comprising the following steps of:
1) preparation of a prepolymer: adding metered polyester polyol, an antioxidant and phosphoric acid into a reaction kettle, adding half amount of solvent DMF, fully and uniformly stirring, then adding isocyanate, wherein the R value is 0.3, and reacting for 1.5h at 70 ℃;
2) synthesis of resin: adding a chain extender into the step 1), continuously adding the residual amount of isocyanate after fully and uniformly stirring, wherein the R value is 1, continuously stirring and reacting for 2 hours at 70 ℃, gradually adding the residual amount of solvent DMF during the reaction process, adding monohydroxy organosilicon into the reaction kettle after the reaction is finished to terminate the reaction, continuously stirring for 1.5 hours, and cooling and coating to obtain the doodle-resistant polyurethane resin for leather.
2. The preparation method of the polyurethane resin for the anti-doodling leather, as claimed in claim 1, wherein the mass percentages of the polyester polyol, the antioxidant, the phosphoric acid, the isocyanate, the chain extender, the monohydroxy silicone and the solvent DMF are 15-22%, 1-3%, 1-2%, 4-8%, 1-4%, 1-3% and the balance being 100%.
3. The method for preparing the polyurethane resin for the anti-doodling leather as claimed in claim 1, wherein the polyester polyol is selected from one or any combination of PBA-4000, PEBA-4000, PHA-4000 and PHBA-4000.
4. The method for preparing the polyurethane resin for the anti-doodling leather according to claim 1, wherein the isocyanate is selected from any one or two of toluene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate and dicyclohexylmethane diisocyanate.
5. The method for preparing the polyurethane resin for the anti-doodling leather according to claim 1, wherein the chain extender is selected from one or two of monoethanolamine, diethanolamine, 1, 6-hexanediol, 1, 4-butanediol and ethylene glycol.
6. The method for preparing the polyurethane resin for the anti-doodling leather according to claim 1, wherein the monohydroxy silicone is selected from any one or two of anionic type, cationic type, nonionic type and complex ionic type monohydroxy silicone.
7. An anti-graffiti polyurethane resin obtained by the production method as set forth in any one of claims 1 to 6.
CN202110268904.2A 2021-03-12 2021-03-12 Polyurethane resin for anti-doodling leather and preparation method thereof Pending CN113150241A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116143994A (en) * 2022-12-29 2023-05-23 广州海豚新材料有限公司 Aqueous organosilicon modified polyurethane dispersoid, preparation method thereof, synthetic leather surface layer containing aqueous organosilicon modified polyurethane dispersoid and luggage leather
CN116410433A (en) * 2022-12-30 2023-07-11 广州海豚新材料有限公司 Silicon-containing polyurethane resin, preparation method thereof and synthetic leather bass

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Application publication date: 20210723