CN107603194A - A kind of leather PU nubuck resins and preparation method thereof - Google Patents
A kind of leather PU nubuck resins and preparation method thereof Download PDFInfo
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- CN107603194A CN107603194A CN201710922888.8A CN201710922888A CN107603194A CN 107603194 A CN107603194 A CN 107603194A CN 201710922888 A CN201710922888 A CN 201710922888A CN 107603194 A CN107603194 A CN 107603194A
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Abstract
The present invention relates to a kind of leather PU nubuck resins and preparation method thereof.A kind of leather includes the raw material of following parts by weight with PU nubuck resins：40 ~ 50 parts of nubuck resin semi-finished product, 1 ~ 2 part of polyethylene wax powder, 1 ~ 2 part of PTFE micro mist waxes, 1 ~ 4 part of silica flatting silica, 4 ~ 6 parts of thermal expansion plastic microsphere, 25 ~ 50 parts of organic solvent.A kind of leather is comprised the following steps with the preparation method of PU nubuck resins：Nubuck resin semi-finished product are prepared first；Then silica flatting silica, polyethylene wax powder, PTFE micro mist waxes, thermal expansion plastic microsphere are added into nubuck resin semi-finished product, then it is stirred after adding organic solvent, rotating speed is 1400 ~ 1500r/min, is finally filtered untill mixture is uniformly dispersed, obtains finished product.The beneficial effects of the present invention are：PU nubuck resin wearabilities obtained by invention are strong, and color and luster and sense of touch are good, are similar to corium, and the preparation method used in the present invention is simple and quick, practical.
Description
Technical field
The present invention relates to a kind of artificial leather Polyurethane resin slurry, and in particular to a kind of leather with PU nubuck resins and
Its preparation method.
Background technology
With the improvement of living standards, people gradually increase for the demand of leather and fur products, but due to real leather products
Quantity is few, price, it is impossible to meets that people increasingly increase
Dermatine product includes case and bag, clothes, footwear etc. at present, and its configuration of surface is varied, and effect style is varied：It is high
Light Gao Gu, outermost layer of skin style, polishing style, the discoloration of crazy horse, sheep bar etc., either in surface effect, or in feel, either
In the physical property quality of product, still imitated leather effect is pursued continuous.
Nubuck resin is to account for very big proportion in leather market in recent years, is foamed using high-temperature expansion, is formed in leather surface
Fluffy effect, part microballoon hesitation parectasis rupture, so that surface forms fine hair sense, coordinates suitable post-production work
Skill, different-style can be made, the dermatine product of similar corium sense of touch.
It is relatively rough to there are the directly sheep bar feel of foaming out for the sheep bar class synthetic leather commercially sold at present, and
Change that its feel can damage staple length again and sheep bar wearability is undesirable with the method for post processing, the deficiency that easy scratch scratches
Place.
Therefore the nubuck resin material that a kind of wearability is strong and sense of touch is good is needed at present.
The content of the invention
In order to which the dermatine feel for solving presently, there are is coarse, the problem of wearing no resistance, there is provided a kind of wearability is strong, touches
PU nubuck resins felt and preparation method thereof.The present invention uses following technological means：
A kind of leather PU nubuck resins, include the raw material of following parts by weight：40 ~ 50 parts of nubuck resin semi-finished product, Tissuemat E
1 ~ 2 part of powder, 1 ~ 2 part of PTFE micro mist waxes, 1 ~ 4 part of silica flatting silica, 4 ~ 6 parts of thermal expansion plastic microsphere, organic solvent 25 ~ 50
Part.
The present invention adds polyethylene wax powder in the feed first, PTFE micro mist waxes, is used cooperatively by material in two
The sense of touch of product surface can be improved well so that dermatine has the grease sense of touch similar to corium, of the invention in addition
From the plastic foamed microballoon that the coefficient of expansion is larger, plastic foamed microballoon has excellent foam performance, and is still after foaming
One complete obturator, can prevent the internal structure of product to be destroyed, and plastic foamed microballoon can expand in process,
It can be reduced after process finishing, so as to leave micropore in the inside of product and surface, these micropores can be filled by micro mist wax, can make
Product is easily worked processing, it is easier to polishes, repairs and cut；The effectively mobile performance of enhancing product system, makes shaping more hold
Easily, the finished product finally obtained is significantly improved in terms of sense of touch and wearability, and more presses close to corium.And the present invention makes
With silica flatting silica, the gloss of product surface is on the one hand reduced, it is visually more closely similar to corium, the opposing party
Face also add the wearability of product.
Preferably, a kind of leather PU nubuck resins, include the raw material of following parts by weight：Nubuck resin semi-finished product 45 ~
50 parts, 1 ~ 2 part of polyethylene wax powder, 1 ~ 3 part of PTFE micro mist waxes, 1.4 ~ 1.7 parts of silica flatting silica, thermal expansion plastic microsphere 4 ~
6 parts, 40 ~ 50 parts of organic solvent.
In this scheme, the product surface hole of acquisition is smaller, sense of touch more preferably, and obtain the more soft tool of product
There is the elasticity similar to corium.
Preferably, described organic solvent be dimethylbenzene, it is toluene, butanone, espeleton, isopropanol, butyl acetate, different
The one or more mixture of butanol, dimethyl carbonate.
Preferably, described nubuck resin semi-finished product include the raw material of following parts by weight：48 ~ 52 parts of polyurethane resin,
0.5 ~ 2 part of organic silicon defoamer, 2 ~ 4 parts of sheep bar powder, 6 ~ 9 parts of association type polyurethanes thickener, surfactant 2 ~ 4
Part, 3 ~ 5 parts of Silica hydrogel, 0.7 ~ 1 part of microcrystalline cellulose.
Improve the hand of product first in the present invention by association type polyurethanes thickener and surfactant collective effect
Sense, because associative thickener molecule has a hydrophobic grouping and hydrophilic radical, the hydrophobic structure of hydrophobic side and surfactant etc.
With intermolecular orientation effect absorption association together, can with matching surface activating agent formed space network, this structure with
The structure of product, which is connected with each other, reaches increase viscosity, levelability, improves richness to improve the mesh of the feel of product and wearability
's.It is also added into Silica hydrogel in the present invention in addition, Silica hydrogel can keep elasticity for a long time in -65~200 DEG C of temperature ranges, it
With excellent chemical stability, adding Silica hydrogel can aid in defoaming, thickening and delustring, and can improve touching for product
Sense, make it have preferably elasticity and wearability.And the present invention adds microcrystalline cellulose in the feed, in process
Microcrystalline cellulose suspension occurs fibrillation in the presence of mechanical force and forms colloid, has the function that thickening, and can be with
It is filled in the micropore of product, makes artificial leather smooth surface, thickness uniform, while also improve the wearability of product.
Preferably, described surfactant is using dimethicone, Siloxane-Oxyalkylene Copolymers, alkyl-modified organic
One or more in siloxanes, quaternary ammonium salt terminal modified polyether.
These surfactants can play good mating reaction with association type polyurethanes thickener, increase product
Viscosity, levelability, richness is improved to improve the purpose of the feel of product.
A kind of leather preparation method of PU nubuck resins, comprises the following steps：
（1）Prepare nubuck resin semi-finished product；
（2）Silica flatting silica, polyethylene wax powder, PTFE micro mist waxes, thermal expansion plastics are added into nubuck resin semi-finished product
Microballoon, then add organic solvent；
（3）To step（2）Obtained mixture is stirred, and rotating speed is 1400 ~ 1500r/min, until mixture is uniformly dispersed
Untill；
（4）To step（3）Obtained mixture is filtered, and obtains finished product.
Preferably, step（1）Nubuck resin semi-finished product preparation process it is as follows：
A. by silica gel agent add organic solvent in, 1000 ~ 1200r/min stir 5 ~ 10min, add microcrystalline cellulose with
700 ~ 800r/min rotating speeds stir 5 ~ 7min；
B. polyurethane resin, surfactant, the thickening of association type polyurethanes are added in the mixture that step a is obtained, to turn
800 ~ 1000r/min of speed stirs 5 ~ 10min, filtering, obtains nubuck resin semi-finished product.
First stirred in step a with higher rotation speed so that Silica hydrogel is fully dispersed in a solvent, then adds microcrystalline cellulose
Element, microcrystalline cellulose is fully dispersed into solvent, and it is to prevent microcrystalline cellulose from glue occurring in the process to reduce rotating speed
The situation that twining between beam closes the mobility for causing to reduce microcrystalline cellulose occurs, to ensure that microcrystalline cellulose can in stepb
To be sufficiently mixed with other raw materials.
In stepb at higher rotational speeds, mixing and the nubuck resin semi-finished product internal structure of each component are contributed to
Formation, the nubuck resin semi-finished product of formation have larger molecular weight in the presence of raw material and technique, so that sheep bar
Resin semi-finished product have higher viscosity, and the nubuck resin semi-finished product that on the whole prepared by this programme are as product made from raw material
With excellent wearability, gloss and sense of touch.
Preferably, in step（3）Described mixture is placed in vacuum degasing machine after middle stirring and carries out vacuum
Deaeration, air pressure are 0.5 ~ 5kPa, and the vacuum defoamation time is 10 ~ 20min.
It can prevent from producing larger stomata on product using vacuum defoamation so as to have influence on the sense of touch of product, can also
Shrink due to pore caused by plastic foamed microballoon so that wax powder is preferably fixed in pore, enhance product sense of touch and
Abrasive resistance.
Preferably, being stirred during vacuum defoamation to described mixture, the rotating speed of stirring is 15 ~ 19r/
min。
Because mixture viscosity is big in de-aeration, bubble when vacuum state escapes by very big drag,
Bubble depends merely on the buoyancy of itself, and the rate of climb is extremely slow, it is therefore desirable to very long inclined heated plate.Therefore the present invention passes through
The mode of stirring accelerates the speed of deaeration, because being stirred under vacuum de-aeration occurs mainly in liquid level, stirring action is advantageous to thing
Bubble in material is carried over.Other bubble needs enough residence times in nearly liquid level and shakes off liquid level tension force, if rotating speed is fast
The effect of deaeration can decline on the contrary, and deaeration effect is good under the rotating speed that the present invention selects, and product quality is high.
In addition surfactant, association type polyurethanes thickener and microcrystalline cellulose are added in the present invention, three
Person coordinates jointly together form mesh space structure with polyurethane resin, and such a structure is beneficial in rotation process at a slow speed
Formation, so as to improve the surface texture of product, strengthen wearability, at the same also have to the folding resistance of product it is a certain degree of plus
By force.
The beneficial effects of the present invention are：（1）PU nubuck resin wearabilities obtained by invention are strong；（2）Obtain product
Color and luster and sense of touch are good, are similar to corium；（2）Invention preparation method used is simple and quick practical.
Embodiment
The present invention is further explained with reference to specific implementation case：
Embodiment 1
A kind of leather PU nubuck resins, include the raw material of following parts by weight：
45 parts of nubuck resin semi-finished product, 1 part of polyethylene wax powder, 1 part of PTFE micro mist waxes, 1.4 parts of silica flatting silica, thermal expansion
4 parts of plastic microsphere, 7.5 parts of toluene, 15 parts of butanone, 7.5 parts of butyl acetate.
Wherein, the raw material for including following parts by weight of nubuck resin semi-finished product：
48 parts of polyurethane resin, 0.5 part of organic silicon defoamer, 2 parts of sheep bar powder, 6 parts of association type polyurethanes thickener, diformazan
2 parts of base silicone oil, 3 parts of Silica hydrogel, 0.7 part of microcrystalline cellulose.
A kind of preparation method of leather PU nubuck resins, step are as follows：
（1）Silica gel agent is added into organic solvent, 1200r/min stirring 10min, microcrystalline cellulose is added and is turned with 750r/min
Speed stirring 5min；
（2）In step（1）Polyurethane resin, surfactant, the thickening of association type polyurethanes are added in obtained mixture, with
Rotating speed 1000r/min stirs 10min, filtering, obtains nubuck resin semi-finished product；
（3）Silica flatting silica, polyethylene wax powder, PTFE micro mist waxes, thermal expansion plastics are added into nubuck resin semi-finished product
Microballoon, then add toluene, butanone, butyl acetate；
（4）To step（3）Obtained mixture is stirred, rotating speed 1500r/min, untill mixture is uniformly dispersed；
（5）By step（4）Obtained mixture, which is placed, carries out vacuum defoamation, air pressure 5kPa, vacuum defoamation in vacuum degasing machine
Time is 15min, and the rotating speed of stirring is 16r/min.
（6）To step（5）Obtained mixture is filtered, and obtains finished product.
After tested, the folding fastness of product is 22.5 DEG C, 200,000 flawlesses, 4 grades of surface color fastness wet friction, is drawn
It is 127N/cm to stretch load.
Embodiment 2
A kind of leather PU nubuck resins, include the raw material of following parts by weight：
50 parts of nubuck resin semi-finished product, 2 parts of polyethylene wax powder, 3 parts of PTFE micro mist waxes, 1.7 parts of silica flatting silica, thermal expansion
4 ~ 6 parts of plastic microsphere, 10 parts of toluene, 20 parts of butanone, 10 parts of butyl acetate.
Wherein, the raw material for including following parts by weight of nubuck resin semi-finished product：
52 parts of polyurethane resin, 2 parts of organic silicon defoamer, 4 parts of sheep bar powder, 9 parts of association type polyurethanes thickener, diformazan
4 parts of base silicone oil, 5 parts of Silica hydrogel, 1 part of microcrystalline cellulose.
A kind of preparation method of leather PU nubuck resins, step are as follows：
（1）Silica gel agent is added into organic solvent, 1200r/min stirring 10min, microcrystalline cellulose is added and is turned with 750r/min
Speed stirring 5min；
（2）In step（1）Polyurethane resin, surfactant, the thickening of association type polyurethanes are added in obtained mixture, with
Rotating speed 1000r/min stirs 10min, filtering, obtains nubuck resin semi-finished product；
（3）Silica flatting silica, polyethylene wax powder, PTFE micro mist waxes, thermal expansion plastics are added into nubuck resin semi-finished product
Microballoon, then add toluene, butanone, butyl acetate；
（4）To step（3）Obtained mixture is stirred, rotating speed 1500r/min, untill mixture is uniformly dispersed；
（5）By step（4）Obtained mixture, which is placed, carries out vacuum defoamation, air pressure 5kPa, vacuum defoamation in vacuum degasing machine
Time is 15min, and the rotating speed of stirring is 16r/min.
（6）To step（5）Obtained mixture is filtered, and obtains finished product.
After tested, the folding fastness of product is 22.8 DEG C, 200,000 flawlesses, 4 grades of surface color fastness wet friction, is drawn
It is 123N/cm to stretch load.
Embodiment 3
A kind of leather PU nubuck resins, include the raw material of following parts by weight：
47 parts of nubuck resin semi-finished product, 1.5 parts of polyethylene wax powder, 2 parts of PTFE micro mist waxes, 1.5 parts of silica flatting silica, heat are swollen
Swollen 5 parts of plastic microsphere, 10 parts of toluene, 20 parts of butanone, 8.5 parts of butyl acetate.
Wherein, the raw material for including following parts by weight of nubuck resin semi-finished product：
50 parts of polyurethane resin, 1.4 parts of organic silicon defoamer, 3 parts of sheep bar powder, 8 parts of association type polyurethanes thickener, two
3 parts of methyl-silicone oil, 4 parts of Silica hydrogel, 1 part of microcrystalline cellulose.
A kind of preparation method of leather PU nubuck resins, step are as follows：
（1）Silica gel agent is added into organic solvent, 1200r/min stirring 10min, microcrystalline cellulose is added and is turned with 750r/min
Speed stirring 5min；
（2）In step（1）Polyurethane resin, surfactant, the thickening of association type polyurethanes are added in obtained mixture, with
Rotating speed 1000r/min stirs 10min, filtering, obtains nubuck resin semi-finished product；
（3）Silica flatting silica, polyethylene wax powder, PTFE micro mist waxes, thermal expansion plastics are added into nubuck resin semi-finished product
Microballoon, then add toluene, butanone, butyl acetate；
（4）To step（3）Obtained mixture is stirred, rotating speed 1500r/min, untill mixture is uniformly dispersed；
（5）By step（4）Obtained mixture, which is placed, carries out vacuum defoamation, air pressure 5kPa, vacuum defoamation in vacuum degasing machine
Time is 15min, and the rotating speed of stirring is 16r/min.
（6）To step（5）Obtained mixture is filtered, and obtains finished product.
After tested, the folding fastness of product is 23 DEG C, 200,000 flawlesses, 4 grades of surface color fastness wet friction, stretching
Load is 131N/cm.
So it may be concluded that the PU nubuck resins obtained by the present invention have, wearability is strong, and color and luster and sense of touch are good, closely
The characteristics of being similar to corium.
Claims (9)
1. a kind of leather PU nubuck resins, it is characterised in that include the raw material of following parts by weight：Nubuck resin semi-finished product 40 ~
50 parts, 1 ~ 2 part of polyethylene wax powder, 1 ~ 2 part of PTFE micro mist waxes, 1 ~ 4 part of silica flatting silica, 4 ~ 6 parts of thermal expansion plastic microsphere,
30 ~ 50 parts of organic solvent.
2. a kind of leather PU nubuck resins according to claim 1, it is characterised in that include the original of following parts by weight
Material：45 ~ 50 parts of nubuck resin semi-finished product, 1 ~ 2 part of polyethylene wax powder, 1 ~ 3 part of PTFE micro mist waxes, silica flatting silica 1.4 ~
1.7 parts, 4 ~ 6 parts of thermal expansion plastic microsphere, 35 ~ 50 parts of organic solvent.
A kind of 3. preparation method of leather PU nubuck resins according to claim 1 or 2, it is characterised in that：Described
Organic solvent is dimethylbenzene, toluene, butanone, espeleton, isopropanol, butyl acetate, isobutanol, dimethyl carbonate one kind or more
The mixture of kind.
A kind of 4. leather PU nubuck resins according to claim 3, it is characterised in that described nubuck resin semi-finished product
Include the raw material of following parts by weight：48 ~ 52 parts of polyurethane resin, 0.5 ~ 2 part of organic silicon defoamer, 2 ~ 4 parts of sheep bar powder, form
6 ~ 9 parts of mould assembly polyurethanes thickener, 2 ~ 4 parts of surfactant, 3 ~ 5 parts of Silica hydrogel, 0.7 ~ 1 part of microcrystalline cellulose.
A kind of 5. leather PU nubuck resins according to claim 4, it is characterised in that：Described surfactant uses
Dimethicone, Siloxane-Oxyalkylene Copolymers, alkyl-modified organosiloxane, one kind in quaternary ammonium salt terminal modified polyether or more
Kind.
6. the preparation method of a kind of leather PU nubuck resins according to claim 5, it is characterised in that including following step
Suddenly：
（1）Prepare nubuck resin semi-finished product；
（2）Silica flatting silica, polyethylene wax powder, PTFE micro mist waxes, thermal expansion plastics are added into nubuck resin semi-finished product
Microballoon, then add organic solvent；
（3）To step（2）Obtained mixture is stirred, and rotating speed is 1400 ~ 1500r/min, until mixture is uniformly dispersed
Untill；
（4）To step（3）Obtained mixture is filtered, and obtains finished product.
A kind of 7. preparation method of leather PU nubuck resins according to claim 6, it is characterised in that：Step（1）'s
The preparation process of nubuck resin semi-finished product is as follows：
A. by silica gel agent add organic solvent in, 1000 ~ 1200r/min stir 5 ~ 10min, add microcrystalline cellulose with
700 ~ 800r/min rotating speeds stir 5 ~ 7min；
B. polyurethane resin, surfactant, the thickening of association type polyurethanes are added in the mixture that step a is obtained, to turn
800 ~ 1000r/min of speed stirs 5 ~ 10min, filtering, obtains nubuck resin semi-finished product.
A kind of 8. preparation method of leather PU nubuck resins according to claim 6, it is characterised in that：In step（3）
Described mixture is placed in vacuum degasing machine after middle stirring and carries out vacuum defoamation, air pressure is 0.5 ~ 5kPa, and vacuum takes off
The bubble time is 10 ~ 20min.
A kind of 9. preparation method of leather PU nubuck resins according to claim 8, it is characterised in that：In vacuum defoamation
During described mixture is stirred, the rotating speed of stirring is 15 ~ 19r/min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710922888.8A CN107603194A (en) | 2017-09-30 | 2017-09-30 | A kind of leather PU nubuck resins and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710922888.8A CN107603194A (en) | 2017-09-30 | 2017-09-30 | A kind of leather PU nubuck resins and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115772366A (en) * | 2022-12-08 | 2023-03-10 | 东莞市新合硅胶材料科技有限公司 | Coating for coating PU and silica gel leather surfaces and preparation method thereof |
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| CN101634109A (en) * | 2009-08-25 | 2010-01-27 | 江苏宝泽高分子材料股份有限公司 | Aqueous PU velvet resin used for synthetic leather |
| CN102382450A (en) * | 2011-08-11 | 2012-03-21 | 苏州鼎润复合材料有限公司 | Nap-up and nap-down brushed yarn buck foaming resin for synthetic leather and preparation method thereof |
| CN102587145A (en) * | 2012-01-09 | 2012-07-18 | 浙江禾欣实业集团股份有限公司 | Manufacturing method of oil-wax feel Yangbuck |
-
2017
- 2017-09-30 CN CN201710922888.8A patent/CN107603194A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101634109A (en) * | 2009-08-25 | 2010-01-27 | 江苏宝泽高分子材料股份有限公司 | Aqueous PU velvet resin used for synthetic leather |
| CN102382450A (en) * | 2011-08-11 | 2012-03-21 | 苏州鼎润复合材料有限公司 | Nap-up and nap-down brushed yarn buck foaming resin for synthetic leather and preparation method thereof |
| CN102587145A (en) * | 2012-01-09 | 2012-07-18 | 浙江禾欣实业集团股份有限公司 | Manufacturing method of oil-wax feel Yangbuck |
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| 强涛涛: "《合成革化学品》", 31 July 2016, 中国轻工业出版社 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115772366A (en) * | 2022-12-08 | 2023-03-10 | 东莞市新合硅胶材料科技有限公司 | Coating for coating PU and silica gel leather surfaces and preparation method thereof |
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Application publication date: 20180119 |