CN114687219A - Polyurethane glue and leather prepared from same - Google Patents
Polyurethane glue and leather prepared from same Download PDFInfo
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- CN114687219A CN114687219A CN202011617893.6A CN202011617893A CN114687219A CN 114687219 A CN114687219 A CN 114687219A CN 202011617893 A CN202011617893 A CN 202011617893A CN 114687219 A CN114687219 A CN 114687219A
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- polyurethane
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- glue
- leather
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- 239000003292 glue Substances 0.000 title claims abstract description 48
- 239000004814 polyurethane Substances 0.000 title claims abstract description 46
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 44
- 239000010985 leather Substances 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 230000009477 glass transition Effects 0.000 claims abstract description 7
- 229920003009 polyurethane dispersion Polymers 0.000 claims description 19
- 210000003491 skin Anatomy 0.000 claims description 12
- 239000004744 fabric Substances 0.000 claims description 11
- 239000012752 auxiliary agent Substances 0.000 claims description 9
- 239000004568 cement Substances 0.000 claims description 6
- 210000002615 epidermis Anatomy 0.000 claims description 6
- 230000002209 hydrophobic effect Effects 0.000 claims description 6
- 239000002518 antifoaming agent Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 2
- 229920005749 polyurethane resin Polymers 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 12
- 230000001070 adhesive effect Effects 0.000 abstract description 5
- 239000000853 adhesive Substances 0.000 abstract description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 44
- 239000004800 polyvinyl chloride Substances 0.000 description 44
- 239000010410 layer Substances 0.000 description 40
- 239000002649 leather substitute Substances 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 13
- 238000002360 preparation method Methods 0.000 description 13
- 238000011156 evaluation Methods 0.000 description 9
- 238000005187 foaming Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 239000002002 slurry Substances 0.000 description 6
- 239000002344 surface layer Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000004014 plasticizer Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- IHBCFWWEZXPPLG-UHFFFAOYSA-N [Ca].[Zn] Chemical compound [Ca].[Zn] IHBCFWWEZXPPLG-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000004049 embossing Methods 0.000 description 3
- 239000004088 foaming agent Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 235000012424 soybean oil Nutrition 0.000 description 3
- 239000003549 soybean oil Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N benzene Substances C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 2
- 239000006084 composite stabilizer Substances 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000004611 light stabiliser Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- -1 trimellitic anhydride ester Chemical class 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001718 carbodiimides Chemical class 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000006254 rheological additive Substances 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000012756 surface treatment agent Substances 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- D06N3/04—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 by reactions only involving carbon-to-carbon unsaturated bonds
- D06N3/06—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 by reactions only involving carbon-to-carbon unsaturated bonds with polyvinylchloride or its copolymerisation products
-
- 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
- D06N2209/00—Properties of the materials
- D06N2209/16—Properties of the materials having other properties
- D06N2209/165—Odour absorbing, deodorizing ability
-
- 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
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/28—Artificial leather
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Dispersion Chemistry (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Abstract
The invention discloses polyurethane glue and leather prepared by the same, wherein the polyurethane glue comprises an aqueous polyurethane dispersoid with a glass transition temperature of-30 ℃ to-10 ℃, a curing agent and water. According to the invention, the polyurethane glue prepared by selecting the aqueous polyurethane dispersoid with a specific glass transition temperature as the raw material of the glue is used for the leather adhesive, so that the odor grade of the leather can be effectively reduced, the softness of the leather can be improved, and the low-temperature flexing resistance of the leather can be improved.
Description
Technical Field
The invention relates to polyurethane glue and leather prepared from the same, wherein the leather can be applied to interior materials of automobiles.
Background
Leather is widely used as a surface finishing material in many fields, for example, in the automotive field, and is used as an interior material of automobiles, and is often used for door panels, seats, instrument panels, and the like of automobiles. Unpleasant odor is the most serious problem with current market feedback on automotive interior materials, and therefore, more and more automotive host plants are raising odor standards for automotive leather, such as thomler and the public. When the leather is applied to parts such as automobile seats and the like, the leather is often in a dynamic flexing-resistant process, and particularly in cold winter, the leather is easy to crack, so that the flexing-resistant test under the low-temperature condition can be met, and the method is a research hotspot of the whole automobile interior decoration industry at present. Taking a polyvinyl chloride artificial leather (hereinafter referred to as a PVC artificial leather) as an example, the conventional PVC artificial leather includes a surface paint layer, a PVC skin layer, a PVC foam layer, a PVC glue layer and a bottom base fabric layer, and has a high smell, a hard hand feeling, and a poor low-temperature flex resistance (ballyflex).
Therefore, it is desirable to provide a new technical solution to solve the above technical problems.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the polyurethane glue and the leather prepared from the same are provided, and the leather has the advantages of low odor grade, soft hand feeling and good low-temperature flexing resistance.
In order to solve the technical problems, the invention can adopt the following technical scheme: a polyurethane glue comprises a waterborne polyurethane dispersoid with a glass transition temperature of-30 to-10 ℃, a curing agent and water.
In the present invention, the glass transition temperature of the aqueous polyurethane dispersion may be-30 degrees, -29 degrees, -28 degrees, -27 degrees, -26 degrees, -25 degrees, -24 degrees, -23 degrees, -22 degrees, -21 degrees, -20 degrees, -19 degrees, -18 degrees, -17 degrees, -16 degrees, -15 degrees, -14 degrees, -13 degrees, -12 degrees, -11 degrees, -10 degrees or a temperature in the range between any two of these temperatures, preferably-25 degrees to-15 degrees.
The polyurethane glue comprises, by total weight of 100 parts, 50-60 parts of an aqueous polyurethane dispersion, 30-48 parts of water, 1-5 parts of a curing agent, 0-5 parts of a leveling aid, 0-3 parts of a rheological aid, 0-2 parts of a defoaming agent and 0-2 parts of a pH regulator.
In the present invention, the aqueous polyurethane dispersion is preferably a polycarbon polyurethane dispersion or a polyester polyurethane dispersion. The particle size of the aqueous polyurethane dispersion is preferably less than 100nm, and if the particle size of the aqueous polyurethane dispersion is selected to be too large, the adhesive property of the surface treatment agent is affected.
In the invention, the components of the aqueous polyurethane dispersion comprise polyurethane resin, water and an auxiliary agent, and the solid content of the aqueous polyurethane dispersion is 30-50%. The water in the aqueous polyurethane dispersion is preferably deionized water, and the auxiliary agent can be a preservative or the like.
The aqueous polyurethane dispersion may be used in an amount of 50 parts, 51 parts, 52 parts, 53 parts, 54 parts, 55 parts, 56 parts, 57 parts, 58 parts, 59 parts, 60 parts, or a part in a range between any two of these parts, based on 100 parts by weight of the total polyurethane cement.
The water in the polyurethane glue is preferably deionized water, and the amount of the water is 30 parts, 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, 42 parts, 44 parts, 46 parts, 48 parts or the parts in the range between any two parts based on 100 parts of the total weight of the polyurethane glue.
The curing agent serves to enhance the bonding of the polyurethane glue, crosslinking a portion of the polyurethane unblocked groups, such as carboxyl and hydroxyl groups. The curing agent may be selected from isocyanate-based curing agents, carbodiimide curing agents, and the like. The curing agent is used in an amount of 1 part, 2 parts, 3 parts, 4 parts, 5 parts, or in a range between any two of these parts, based on 100 parts of the total weight of the polyurethane glue.
The leveling auxiliary agent is used for wetting and leveling, so that the polyurethane glue can be uniformly paved on the surface layer of the leather. The leveling auxiliary agent can be added or not added according to specific application requirements, and when the surface tension of the surface layer is too small, the leveling auxiliary agent needs to be added to reduce the surface tension of the glue, so that the surface tension is smaller than that of the surface layer, and the glue is well spread. The leveling auxiliary agent can be selected from fluorine modified acrylic esters, alkynediol and organic silicon. The leveling aid may be used in an amount of 0 part, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, or in a range between any two of these parts, based on 100 parts of the total weight of the polyurethane glue.
The rheological additive is used for adjusting the viscosity of the polyurethane glue, and an acrylate leveling additive can be selected and added or not added according to actual application. The rheological aid is used in an amount of 0 part, 1 part, 2 parts, 3 parts or in a range between any two of the parts, based on 100 parts of the total weight of the polyurethane glue.
The defoaming agent is used for eliminating bubbles and is mainly used in a glue formula for generating bubbles. The amount of the defoamer is 0 part, 1 part, 2 parts or a part ranging between any two of the parts, based on 100 parts of the total weight of the polyurethane glue.
In order to solve the technical problems, the invention can also adopt the following technical scheme: the leather comprises an epidermal layer, a base cloth layer and a glue layer positioned between the epidermal layer and the base cloth layer, wherein the glue layer is prepared from the polyurethane glue.
In the present invention, the skin layer is a PVC skin layer or a TPO skin layer or a PU skin layer.
In the invention, the base cloth layer is provided with a hydrophobic layer on one side bonded with the glue layer.
Compared with the prior art, the invention has at least the following beneficial effects: according to the invention, the polyurethane glue prepared by selecting the aqueous polyurethane dispersoid with a specific glass transition temperature as the raw material of the glue is used for the leather adhesive, so that the odor grade of the leather can be effectively reduced, the softness of the leather can be improved, and the low-temperature flexing resistance of the leather can be improved.
Detailed Description
The invention is further illustrated by the following examples and comparative examples.
Example 1
This example is a preparation of PVC artificial leather, and the preparation method of PVC artificial leather adopted in this example is a method that is conventional in the art, and it will be clear to those skilled in the art how to select specific equipment, process steps and conditions, and therefore, the following description of the preparation process will refer only to key steps and conditions.
The method comprises the following steps: preparation of PVC compact layer slurry
Selecting 55 parts of PVC powder, and mixing epoxidized soybean oil and an o-benzene plasticizer according to the weight ratio of 3: 1, mixing 40 parts of plasticizer, 6 parts of fluorocarbon foaming agent, 2 parts of calcium-zinc composite stabilizer, 1 part of aluminum hydroxide auxiliary agent, 1 part of hindered amine light stabilizer, 1 part of hindered phenol antioxidant and 3 parts of pigment which are used as raw materials, stirring for 60min, vacuumizing for 10min, and continuously stirring for 15min to obtain the PVC compact layer slurry.
Step two: preparation of PVC foaming layer slurry
Selecting 55 parts of PVC powder, 2 parts of foaming agent, and mixing 3 parts of epoxidized soybean oil and o-benzene plasticizer: 1, mixing 40 parts of plasticizer, 6 parts of fluorocarbon foaming agent, 2 parts of calcium-zinc composite stabilizer, 1 part of aluminum hydroxide auxiliary agent, 1 part of hindered amine light stabilizer, 1 part of hindered phenol antioxidant and 3 parts of pigment which are used as raw materials, stirring for 60min, vacuumizing for 10min, and continuously stirring for 15min to obtain PVC foaming layer slurry.
Step three: preparation of PVC skin layers
Coating the PVC compact layer slurry prepared in the step one on release paper, and drying to obtain a PVC compact layer; then coating a layer of PVC foaming layer slurry prepared in the second step on the PVC compact layer, and drying to obtain a PVC foaming layer; the PVC compact layer and the PVC foaming layer jointly form a PVC surface layer.
Step four: bonding of PVC foaming layer and base cloth
Selecting the components and contents of example 1 in the following table 1 as raw materials to mix to prepare glue, providing a hydrophobic base fabric, arranging a hydrophobic layer on one side of the hydrophobic base fabric, and bonding the PVC foaming layer and the hydrophobic base fabric together by the glue to obtain a semi-finished PVC artificial leather product.
Step five: printing and embossing
And C, printing and drying the PVC artificial leather semi-finished product obtained in the step four to obtain the coating layer. Embossing is carried out on the surface of the coating layer by using an embossing device, and the PVC artificial leather of the embodiment is prepared.
Examples 2 to 7 and comparative examples 1 to 3
Examples 2 to 7 and comparative examples 1 to 4 were all the same as example 1 in the preparation of PVC artificial leather, and the preparation process thereof, raw material of PVC skin layer, raw material of paint layer and base fabric were exactly the same except for the components of polyurethane glue and/or the content thereof, as shown in tables 4 to 1 and 4 to 2. The preparation process is not described in detail herein.
Comparative example 4
Comparative example 4 is a preparation of PVC artificial leather, and the preparation process, the raw material of PVC skin layer, the raw material of polyurethane glue and the raw material of paint layer are completely the same as example 2, except that the hydrophilic base cloth was selected in comparative example 4, and specifically, refer to table 4-2.
Comparative example 5
Comparative example 5 is a preparation of PVC artificial leather, and the preparation process, the raw material of the PVC skin layer, and the raw material of the coating layer are the same as those of example 2, except that PVC glue is selected instead of polyurethane glue. The PVC glue comprises the following components in percentage by weight: 44 parts of polyvinyl chloride resin, 2 parts of calcium zinc stabilizer, epoxidized soybean oil and trimellitic anhydride ester, wherein the weight ratio of (2: 9 proportion of 56 parts of plasticizer.
Testing and analysis of Artificial leather
The PVC artificial leather prepared in examples 1 to 7 and comparative examples 1 to 5 was subjected to the Ballyflex performance test and analysis in accordance with BMW DIN32100, and the evaluation criteria are shown in Table 1 and the results are shown in Table 5.
TABLE 1 evaluation criteria for BMW DIN32100 Ballyflex Performance test
| Rank of | Evaluation criteria |
| 0 | Has no change |
| 1 | Crazing and whitening of paint layer under magnifier |
| 2 | Micro cracks on lower surface layer of magnifying glass |
| 3 | Cracks of the foamed layer under the magnifier can be seen |
| 4 | Cracking of the surface layer |
| 5 | Complete breaking of the coating, skin, foam layers |
The PVC artificial leather prepared in examples 1 to 7 and comparative examples 1 to 5 were subjected to odor grade test and analysis according to BMW VDA270, evaluation criteria are as shown in table 2, and the results are as shown in table 5.
TABLE 2 evaluation criteria for BMW VDA270 odor rating test
| Rank of | Evaluation criteria |
| 1 | Tasteless (imperceptible) |
| 2 | Perceptible, but not disturbing |
| 3 | Has obvious taste, but is not disturbing to people |
| 4 | Disturbing to the human body |
| 5 | Very disturbing |
| 6 | Intolerable |
The PVC artificial leather prepared in examples 1 to 7 and comparative examples 1 to 5 was subjected to adhesion test and analysis in accordance with BMW DIN EN ISO 2411Verf.A, with evaluation criteria as in Table 3, and the results are shown in Table 5.
TABLE 3 evaluation criteria for the BMW DIN EN ISO 2411Verf.A adhesion test
| Adhesion force | Evaluation criteria |
| >40N | OK |
| <40N | NOK |
The polyurethane glues prepared in examples 1 to 7 and comparative examples 1 to 4 were left at room temperature and observed for the time when they flocculated to judge their storage stability, and the results are shown in Table 5.
Table 4-1 examples 1-6 compositions and amounts of polyurethane glues (the amounts of the components in this table are based on 100 parts of the total weight of the polyurethane glue)
Tables 4-2 Components and amounts of polyurethane glues in example 7 and comparative examples 1-4 (the amounts of the components in the tables are based on 100 parts by weight of the polyurethane glue)
TABLE 5 test results
As can be seen from the above table, the PVC artificial leather prepared in example 1 has good low temperature flexing resistance, odor level, hand feeling and adhesive property, and shows flocculation phenomenon when stored for 1 day. The PVC artificial leather prepared in examples 2-3 and 5-7 was excellent in low-temperature flex resistance, odor grade, hand feeling, adhesive property and storage stability. The PVC artificial leather prepared in example 4 has good low-temperature flexing resistance, odor level, hand feeling and storage stability, and the adhesion performance test can pass 25N, so that the requirement of larger adhesion performance cannot be met.
It will be appreciated that the above-described embodiments of the invention may be combined with each other to obtain further embodiments, without conflict. The individual features described in the above embodiments may be combined in any suitable manner without contradiction.
The above embodiments are merely preferred embodiments of the present invention, and not all embodiments are possible. It will be appreciated that those skilled in the art can devise many reasonable variations of the present invention without departing from the true spirit and scope of the invention, which reasonable variations are within the scope of the present invention.
Claims (9)
1. A polyurethane glue is characterized in that: the polyurethane glue comprises the components of an aqueous polyurethane dispersoid with the glass transition temperature of-30 to-10 ℃, a curing agent and water.
2. The polyurethane cement of claim 1, wherein: the glass transition temperature of the aqueous polyurethane dispersion is-25 ℃ to-15 ℃.
3. The polyurethane cement of claim 1, wherein: the particle size of the aqueous polyurethane dispersion is less than 100 nm.
4. A polyurethane cement as defined in claim 1, wherein: the aqueous polyurethane dispersion is a polycarbon polyurethane dispersion or a polyester polyurethane dispersion.
5. The polyurethane cement of claim 1, wherein: the components of the aqueous polyurethane dispersion comprise polyurethane resin, water and an auxiliary agent, and the solid content of the aqueous polyurethane dispersion is 30-50%.
6. The polyurethane cement of any one of claims 1 to 5, wherein: the polyurethane glue comprises, by total weight of 100 parts, 50-60 parts of an aqueous polyurethane dispersion, 30-48 parts of water, 1-5 parts of a curing agent, 0-5 parts of a leveling aid, 0-3 parts of a rheological aid, 0-2 parts of a defoaming agent and 0-2 parts of a pH regulator.
7. Leather comprising a skin layer, a base layer and a glue layer located between the skin layer and the base layer, characterized in that: the glue layer is prepared from the polyurethane glue of any one of claims 1 to 6.
8. Leather as claimed in claim 7, wherein: the epidermal layer is a PVC epidermal layer or a TPO epidermal layer or a PU epidermal layer.
9. Leather as claimed in claim 7, wherein: and a hydrophobic layer is arranged on one side of the base cloth layer bonded with the glue layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011617893.6A CN114687219A (en) | 2020-12-30 | 2020-12-30 | Polyurethane glue and leather prepared from same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011617893.6A CN114687219A (en) | 2020-12-30 | 2020-12-30 | Polyurethane glue and leather prepared from same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114687219A true CN114687219A (en) | 2022-07-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011617893.6A Pending CN114687219A (en) | 2020-12-30 | 2020-12-30 | Polyurethane glue and leather prepared from same |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117188172A (en) * | 2023-09-12 | 2023-12-08 | 诺奇兄弟新材料(吴江)有限公司 | Fiber composite structure, preparation method, crease repairing method and composite product |
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|---|---|---|---|---|
| JPH09111671A (en) * | 1995-10-18 | 1997-04-28 | Kyowa Leather Cloth Co Ltd | Synthetic leather and its production |
| CN102634318A (en) * | 2012-05-02 | 2012-08-15 | 江苏华大新材料有限公司 | Low-temperature-resisting solvent type polyurethane bonding agent and preparation method thereof |
| CN103255639A (en) * | 2013-04-19 | 2013-08-21 | 晋江市闽高纺织科技有限公司 | Environmentally-friendly polyurethane leather, preparation method and product thereof |
| CN104861917A (en) * | 2015-06-09 | 2015-08-26 | 中国科学技术大学 | Water-based polyurethane adhesive and preparation method thereof |
| CN107366166A (en) * | 2017-05-24 | 2017-11-21 | 贝内克-长顺汽车内饰材料（张家港）有限公司 | Polyvinyl chloride interior leather for automobiles without genotoxicity and preparation method thereof |
-
2020
- 2020-12-30 CN CN202011617893.6A patent/CN114687219A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09111671A (en) * | 1995-10-18 | 1997-04-28 | Kyowa Leather Cloth Co Ltd | Synthetic leather and its production |
| CN102634318A (en) * | 2012-05-02 | 2012-08-15 | 江苏华大新材料有限公司 | Low-temperature-resisting solvent type polyurethane bonding agent and preparation method thereof |
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