CN114381202A - Organic silicon composition and PU-organic silicon synthetic leather - Google Patents
Organic silicon composition and PU-organic silicon synthetic leather Download PDFInfo
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- 239000002649 leather substitute Substances 0.000 title claims abstract description 51
- 239000000203 mixture Substances 0.000 title claims abstract description 34
- 229910052710 silicon Inorganic materials 0.000 title abstract description 50
- 239000010703 silicon Substances 0.000 title abstract description 50
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title abstract description 48
- -1 silicon modified acrylate Chemical class 0.000 claims abstract description 12
- NIXOWILDQLNWCW-UHFFFAOYSA-M acrylate group Chemical group C(C=C)(=O)[O-] NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 6
- 239000002904 solvent Substances 0.000 claims abstract description 6
- 229920001296 polysiloxane Polymers 0.000 claims description 34
- 125000001424 substituent group Chemical group 0.000 claims description 10
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 9
- 125000003118 aryl group Chemical group 0.000 claims description 8
- 229920002554 vinyl polymer Polymers 0.000 claims description 8
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 7
- 125000000217 alkyl group Chemical group 0.000 claims description 6
- 238000004132 cross linking Methods 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 150000001335 aliphatic alkanes Chemical group 0.000 claims description 4
- 125000003342 alkenyl group Chemical group 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- 239000003085 diluting agent Substances 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 4
- 239000003112 inhibitor Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 239000004615 ingredient Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 125000003545 alkoxy group Chemical group 0.000 claims description 2
- 125000000304 alkynyl group Chemical group 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 125000003700 epoxy group Chemical group 0.000 claims description 2
- 229910021485 fumed silica Inorganic materials 0.000 claims description 2
- UQEAIHBTYFGYIE-UHFFFAOYSA-N hexamethyldisiloxane Chemical group C[Si](C)(C)O[Si](C)(C)C UQEAIHBTYFGYIE-UHFFFAOYSA-N 0.000 claims description 2
- 239000003350 kerosene Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 2
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 2
- 239000010453 quartz Substances 0.000 claims description 2
- 125000004469 siloxy group Chemical group [SiH3]O* 0.000 claims description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 27
- 238000000576 coating method Methods 0.000 abstract description 27
- 230000003373 anti-fouling effect Effects 0.000 abstract description 9
- 230000032683 aging Effects 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 3
- 238000007259 addition reaction Methods 0.000 abstract description 2
- 239000011229 interlayer Substances 0.000 abstract description 2
- 239000012948 isocyanate Substances 0.000 abstract description 2
- 150000002513 isocyanates Chemical class 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 27
- 239000010985 leather Substances 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 11
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- 229910020388 SiO1/2 Inorganic materials 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000002202 Polyethylene glycol Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 125000004386 diacrylate group Chemical group 0.000 description 6
- 238000000227 grinding Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- 229920001223 polyethylene glycol Polymers 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 239000004744 fabric Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 239000002390 adhesive tape Substances 0.000 description 4
- 229910020485 SiO4/2 Inorganic materials 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- NWVVVBRKAWDGAB-UHFFFAOYSA-N p-methoxyphenol Chemical compound COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- FJQXCDYVZAHXNS-UHFFFAOYSA-N methadone hydrochloride Chemical compound Cl.C=1C=CC=CC=1C(CC(C)N(C)C)(C(=O)CC)C1=CC=CC=C1 FJQXCDYVZAHXNS-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 235000016795 Cola Nutrition 0.000 description 1
- 235000011824 Cola pachycarpa Nutrition 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 230000002742 anti-folding effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 235000021539 instant coffee Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000015205 orange juice Nutrition 0.000 description 1
- 229920006136 organohydrogenpolysiloxane Polymers 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention provides an organic silicon composition and PU-organic silicon synthetic leather, the invention adds tackifier of organic silicon modified acrylate and organic silicon modified isocyanate into the organic silicon composition, and then coats the organic silicon composition on the PU synthetic leather, the organic silicon composition forms an organic silicon coating after molding, the organic silicon coating has good hand feeling, has the characteristics of softness, fineness and rich elasticity, has good anti-fouling effect and good anti-fouling performance, fills up the defect of poor anti-fouling performance of the PU synthetic leather, is aging-resistant, can be used for a long time within the range of-40 ℃ to 200 ℃ for the organic silicon coating, can effectively relieve the aging of the PU synthetic leather, has good interlayer adhesion between the PU synthetic leather and the organic silicon coating, contains structural units of acrylate group and organic silicon in the tackifier, can participate in the addition reaction of the organic silicon composition, and has good adhesion with the PU synthetic leather, the PU-organic silicon synthetic leather has good hand feeling, solvent resistance, good stain resistance, excellent scratch resistance and wear resistance and low cost.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of synthetic leather, and particularly relates to an organic silicon composition and PU-organic silicon synthetic leather.
[ background of the invention ]
The PU synthetic leather has soft hand feeling, air permeability, high toughness and environmental protection, is the first choice for leather, but is water-resistant, light-resistant, easy to age and crisp and poor in stain resistance. The organic silicon synthetic leather is safe and environment-friendly, has excellent aging resistance, good wear resistance, scratch and solid appearance, no peeling, wear resistance, soft hand feeling, strong waterproof and anti-fouling performance, high and low temperature resistance, but higher price. In order to reduce the cost, manufacturers develop an organic silicon coating, and the organic silicon coating is coated on the surface of the PU synthetic leather to obtain the organic silicon-PU synthetic leather with the performance close to or equal to that of the organic silicon synthetic leather.
In order to solve the problems, a new technical scheme is provided.
[ summary of the invention ]
The invention aims to overcome the defects of the prior art and provides an organic silicon composition and PU-organic silicon synthetic leather.
In order to solve the technical problems, the invention adopts the following technical scheme:
a silicone composition comprising the following ingredients:
a: 20-60% of straight chain dialkyl polysiloxane, wherein each molecule has at least two vinyl groups on average and the molecular weight is 40-80 ten thousand;
b: 50-80% of a compound of formula MR1 aMR2 bDR1/R2 cQdWherein R is1The substituents represented are each alkyl, alkenyl, alkynyl; r2Alkyl and aryl groups having 1 to 6 carbon atoms as substituents; wherein a, b, c and d are positive numbers, and satisfy the condition that a + b + c + d is 1, a + b is more than 0.2 and less than 0.45, a is more than 0.05 and less than 0.2, b is more than 0.25 and less than 0.4, c is more than or equal to 0 and less than 0.5, and (a + b)/d is more than 0.65 and less than 0.9;
c: tackifier
CⅠ: the general formula is:
wherein R is1The substituents represented by R being alkyl or aryl having 1 to 6 carbon atoms2The substituent represented is acrylate group, epoxy group, alkoxy group, aryl group (preferably acrylate group); wherein y is more than or equal to 1 and less than or equal to 30, and m is more than or equal to 5 and less than or equal to 12;
CⅡ: the structure is as follows:
wherein R is1The substituents represented by R being alkyl or alkenyl having 1 to 6 carbon atoms2Represents 1-6 carbon atoms connected siloxy, epoxy and aryl;
d: crosslinking component
DⅠ: an organopolysiloxane containing at least 0.5% but not more than 1.6% by mass of silicon-bonded hydrogen atoms;
DⅡ: an organopolysiloxane resin containing at least 0.5% but not more than 1.2% by mass of silicon-bonded hydrogen atoms;
e: catalyst and process for preparing same
F: inhibitors
G: filler material
And, H: an environment-friendly diluent.
In a further improvement, the 20-60% linear dialkylpolysiloxane has an average of at least two vinyl groups per molecule and a molecular weight of 40-60 ten thousand.
In a further development, the crosslinking component DⅠIs an organopolysiloxane containing at least 0.75% but not more than 1.6% by mass of silicon-bonded hydrogen atoms.
In a further development, the crosslinking component DⅡIs an organopolysiloxane resin containing at least 0.5% but not more than 1.0% by mass of silicon-bonded hydrogen atoms.
In a further refinement, the catalyst is a platinum-vinylsiloxane complex, an alcohol-modified chloroplatinic acid or a platinum-alkyne-based complex.
In a further development, the inhibitor is an alkynol compound, a polyvinyl polysiloxane, an amide compound or a maleate compound.
In a further refinement, the filler is fumed silica, ultrafine PMMA powder, quartz powder or calcium carbonate.
In a further improvement, the environmentally friendly diluent is an alkane solvent.
In a further refinement, the alkane solvent is hexamethyldisiloxane or kerosene.
The PU-organic silicon synthetic leather comprises PU synthetic leather, and the organic silicon composition is coated on the surface of the PU synthetic leather.
Compared with the prior art, the invention has the beneficial effects that: by adding the adhesion promoter of the organic silicon modified acrylate and the organic silicon modified isocyanate into the organic silicon composition, then coating the organosilicon composition on PU synthetic leather, forming an organosilicon coating after the organosilicon composition is formed, wherein the organosilicon coating has good hand feeling, soft, fine and elastic characteristics, good antifouling effect and good antifouling performance, fills the defect of poor antifouling performance of the PU synthetic leather, is aging-resistant, can be used for a long time at the temperature of between 40 ℃ below zero and 200 ℃, can effectively relieve the aging of the PU synthetic leather, the PU synthetic leather and the organic silicon coating have good interlayer adhesion, the tackifier also contains structural units of acrylate group and organosilicon, so that the tackifier can participate in the addition reaction of the organosilicon composition and can be well bonded with PU synthetic leather to obtain the PU-organosilicon synthetic leather with good hand feeling, solvent resistance, good stain resistance, excellent scratch resistance and wear resistance and low cost.
[ detailed description ] embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The following silicone compositions were prepared by way of examples and comparative examples, and the following tables 1 and 2 show the components and ratios of the examples/comparative examples:
table 1: examples 1-9 specific Components and ratios for preparing Silicone compositions
Table 2: comparative examples 1 to 5 are specific components and compounding ratios for preparing the organosilicon composition
In examples 1 to 9, and comparative examples 1 to 5,
A1: dimethyl siloxane with molecular weight of 60 ten thousand and vinyl mole percent of 1 percent;
A2: dimethylsiloxane with a molecular weight of 60 ten thousand and a vinyl content of 1.5 mol%;
B1: vi ═ 3.5%, average unit formula (ViMe)2SiO1/2)0.090(Me3SiO1/2)0.340(SiO4/2)0.570The organopolysiloxane of (a);
B2: vi 2.8% average unit formula (ViMe)2SiO1/2)0.070(Me3SiO1/2)0.360(SiO4/2)0.570Is provided withAn organopolysiloxane;
B3: vi 2.8% average unit formula (ViMe)2SiO1/2)0.074(ViMe2SiO1/2)0.005(ViMe2SiO1/2)0.921The organopolysiloxane of (a);
CⅠ-1: 100 parts of Polyethylene Glycol (400) Diacrylate (Polyethylene Glycol (400) Diacrylate), 100 parts of toluene, 0.23 part of platinum-vinyl siloxane complex with the platinum content of 5000ppm, 0.57 part of p-hydroxyanisole, which are fully stirred for 5min in a nitrogen environment, the temperature is increased to 65 ℃, 13.22 parts of hydrogen-containing double end socket is added dropwise (the temperature in the dropwise adding process is not more than 65-70 ℃), the temperature is increased to 75 ℃ after the dropwise adding is finished, the reaction is continued for 6h, the reaction is carried out for 1h under vacuum at 80-90 ℃, and the following structural formula can be obtained after the temperature is reduced:
CⅠ-2: 100 parts of Polyethylene Glycol (300) Diacrylate (Polyethylene Glycol (300) Diacrylate), 100 parts of toluene, 0.23 part of platinum-vinyl siloxane complex with the platinum content of 5000ppm, 0.57 part of p-hydroxyanisole, which are fully stirred for 5min in a nitrogen environment, the temperature is increased to 65 ℃, 13.22 parts of hydrogen-containing double end socket is added dropwise (the temperature in the dropwise adding process is not more than 65-70 ℃), the temperature is increased to 75 ℃ after the dropwise adding is finished, the reaction is continued for 6h, the reaction is carried out for 1h under vacuum at 80-90 ℃, and the following structural formula can be obtained after the temperature is reduced:
CⅠ-3: 100 parts of Polyethylene Glycol (400) Diacrylate (Polyethylene Glycol (400) Diacrylate), 100 parts of toluene, 0.23 part of platinum-vinyl siloxane complex with the platinum content of 5000ppm and 0.57 part of p-hydroxyanisole are fully stirred for 5min in a nitrogen environment, the temperature is increased to 65 ℃, 109.35 parts of hydrogen-terminated silicone oil with the hydrogen content of 0.18 percent is added dropwise, the temperature is increased to 75 ℃ after the dropwise addition is finished, and then the mixture is subjected toAfter the reaction is continued for 6h, the reaction is reduced for 1h in vacuum at the temperature of 80-90 ℃, and the following structural formula can be obtained after the temperature is reduced:
CⅡ-1the structure of (can be directly purchased or synthesized):
CⅡ-2the structure of (1) is as follows:
DⅠ: a straight-chain type polyhydrosiloxane having only a side chain containing a silicon-bonded hydrogen atom, the hydrogen content being 1%;
DⅡ: average unit formula (HMe)2SiO1/2)0.92(SiO4/2) An organohydrogenpolysiloxane having a hydrogen content of 0.75%.
The organosilicon compositions prepared in the above examples 1 to 9 and comparative examples 1 to 5 were used for preparing PU-organosilicon synthetic leather:
1. firstly, cleaning dust and impurities on the surface of the PU synthetic leather;
2. coating the organosilicon composition with the thickness of 5-10u on the surface of the PU synthetic leather, forming an organosilicon coating on the PU synthetic leather, and curing at the temperature of 130 ℃/30-60s to prepare the PU-organosilicon synthetic leather.
The silicone composition was tested for properties including hand, stain resistance, abrasion resistance, scratch resistance, adhesion, color fastness, folding fastness, and cold and hot resistance.
The test method comprises the following steps:
1. judging hand feeling: placing the palm on the surface of the PU-organic silicon synthetic leather for back-and-forth friction, and making the hand feeling dry and smooth as OK; the hand feeling is dry and slightly astringent; the hand feeling is cool and unsmooth, and is NG;
2. and (3) anti-fouling test:
testing one: 3-5 samples of 100 mm. times.200 mm are cut out from PU-silicone synthetic leather and tested according to the method specified in Q/JLY J7110614B-2015 using instant coffee, cola and orange juice.
And (4) judging the standard:
level 1-stains are hardly removed, with obvious staining (black spots, etc.);
grade 2-small portion of stain was removed (area less than 50%), sample was significantly changed;
grade 3-most of the stain was removed (area greater than 50%), and the residue was clearly found;
grade 4-most of the stain was removed (area greater than 50%), the specimen was slightly discolored or stained;
grade 5-the stain was completely removed and no stain was found.
And (2) testing: 3 lines with the length of 1-2cm are respectively drawn on 3-5 different parts of the PU-organic silicon synthetic leather by using a black marking pen (a small double-end marking pen with the thick end of 1.5 mm), and after the ink is completely dried in 10min, the PU-organic silicon synthetic leather is wiped back and forth by using cotton cloth for 10 times.
And (4) judging the standard:
preferably, the surface ink is easy to clean and has no residue;
good-surface ink is mostly wiped off and remains in a small amount;
generally, the color of the ink on the surface is light, and obvious residue exists;
poor-no apparent color change of the surface ink.
3. And (3) wear resistance test: testing Martindale (Martindale) -testing according to the method specified in GB/T13775, and adopting SM-25 wool cloth and load 795g, and performing 100000 times of single test.
And (4) judging the standard:
level 1, the leather surface is seriously abraded and the cloth bottom is obviously exposed;
level 2, the texture of the leather surface is basically ground flat or the texture becomes light and the edge is seriously damaged;
grade 3-clear surface texture, slight edge wear or damage;
grade 4-surface gloss changed, surface grain clear and no wear or damage;
grade 5-the surface texture of the leather is basically unchanged.
The Taber test is carried out according to a method specified in ASTM-D3884, and an H-22 grinding wheel and a single-side load of 750g are adopted for testing.
And (4) judging the standard:
1-500 times of grinding or breaking the leather surface grains;
2-1000 times of grinding or breaking the leather surface grains;
3-1500 times of grinding or breaking the leather surface grains;
4-grade-2000 times of grinding or breaking leather surface grains;
grade 5-more than or equal to 2500 times of grinding or damaging the surface texture of the leather.
4. Scratch resistance test: the test was carried out according to the method specified in SAE J365-2004, with 50 times of 20N weight.
And (4) judging the standard:
level 1-leather surface is obviously damaged and cloth bottom is exposed;
2, the leather surface has obvious scratches and is damaged;
grade 3, the leather surface has obvious scratches and is not damaged;
grade 4, the leather surface is slightly scratched and is not damaged;
grade 5-the leather surface has no scratch and no obvious change.
5. Peeling test: when the organic silicon coating is coated, a thin release film with the width of 2cm is laid on the PU synthetic leather, the separation width of 2cm is formed between the organic silicon coating and the PU synthetic leather, the PU synthetic leather is cut into 5 parts of sample strips with the size of 25 multiplied by 150mm along the separation direction, adhesive tapes with the same size are attached on the organic silicon coating, the PU synthetic leather and the organic silicon coating end are respectively put into a tensile tester clamp for testing, and the testing distance is 200 mm:
OK, the organic silicon coating is broken at the boundary and is completely left on the PU synthetic leather or the organic silicon coating is uniformly left on the PU synthetic leather and the adhesive tape;
good-most of the organic silicon coating remains on the PU synthetic leather, and a small amount of residue remains on the adhesive tape;
generally, most of the organic silicon coating is left on the adhesive tape, and a small part of the organic silicon coating is left on the PU synthetic leather;
NG, most/all of the organic silicon coating is stripped from the PU synthetic leather.
6. Color fastness: a sample wafer with the length multiplied by the width of 140 multiplied by 50mm is taken, a dry friction test and a wet friction test (the water content of the friction cloth is 95-100 percent) are carried out according to the GB/T3920-.
And (4) judging the standard:
the gray sample card is divided into 5 grades and 9 grades, the friction color fastness corresponds to the grade number of the color card, 5 grades are the best friction color fastness, 1 grade is the worst friction color fastness, and the like.
7. Folding fastness: sampling was performed according to QB/T2706-2005, 6 specimens were cut from the grain surface with a die knife according to QB/T2707-.
And (4) judging the standard: whether there is a break or crack.
8. Cold and hot impact: and testing the anti-fouling and folding fastness after 200 cycles by using a cold and hot impact experimental box at the temperature of-40-120 ℃.
The test results are shown in table 3, and table 4 shows the test results of the silicone compositions prepared in examples 1 to 9 after they are used in the preparation of the PU-silicone synthetic leather, and table 4 shows the test results of the silicone compositions prepared in comparative examples 1 to 5 after they are used in the preparation of the PU-silicone synthetic leather.
TABLE 3
TABLE 4
And (4) conclusion: the test results of comparative example 1 in table 4 are compared with the test results of examples 1 to 6 in table 3, so that the organic silicon coating without the tackifier has no adhesion to the PU synthetic leather; from the test results of comparative example 2 in comparison with those of examples 1, 2, 3 and 9, tackifier C was obtainedⅠAnd CⅡThe adhesion effect of the organic silicon coating on the PU synthetic leather is optimal under the combined action; compared with the test results of examples 1-6, the test result of comparative example 3 can obtain that the resin system has better strength and wear resistance and is more suitable for the organic silicon surface coating; from the comparison of the test results of comparative example 4 with those of examples 1 to 9, it can be seen that C alone is usedⅡHas no obvious enhancement on the adhesion of the organic silicon coating and the PU leather and is subjected to CⅡToo high a vinyl content results in a colloid that is too brittle, severely affecting performance; c is obtained from the comparison of the test results of comparative example 5 with those of example 1ⅠThe reduction can obviously reduce the adhesion between the organic silicon coating and the PU synthetic leather.
Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art from this disclosure that various changes or modifications can be made herein without departing from the principles and spirit of the invention as defined by the appended claims. Therefore, the detailed description of the embodiments of the present disclosure is to be construed as merely illustrative, and not limitative of the remainder of the disclosure, but rather to limit the scope of the disclosure to the full extent set forth in the appended claims.
Claims (10)
1. An organosilicon composition, characterized in that it comprises the following components:
a: 20-60% of straight chain dialkyl polysiloxane, wherein each molecule has at least two vinyl groups on average and the molecular weight is 40-80 ten thousand;
b: 50-80% of a compound of formula MR1 aMR2 bDR1/R2 cQdWherein R is1The substituents represented are each alkyl, alkenyl, alkynyl; r2Alkyl and aryl groups having 1 to 6 carbon atoms as substituents; wherein a, b, c and d are positive numbers, and satisfy the condition that a + b + c + d is 1, a + b is more than 0.2 and less than 0.45, a is more than 0.05 and less than 0.2, b is more than 0.25 and less than 0.4, c is more than or equal to 0 and less than 0.5, and (a + b)/d is more than 0.65 and less than 0.9;
c: tackifier
CⅠ: the general formula is:
wherein R is1The substituents represented by R being alkyl or aryl having 1 to 6 carbon atoms2The substituent represented is acrylate group, epoxy group, alkoxy group, aryl group (preferably acrylate group); wherein y is more than or equal to 1 and less than or equal to 30, and m is more than or equal to 5 and less than or equal to 12;
CⅡ: the structure is as follows:
or
Or
Wherein R is1The substituents represented by R being alkyl or alkenyl having 1 to 6 carbon atoms2Represents 1-6 carbon atoms connected siloxy, epoxy and aryl;
d: crosslinking component
DⅠ: an organopolysiloxane containing at least 0.5% but not more than 1.6% by mass of silicon-bonded hydrogen atoms;
DⅡ: an organopolysiloxane resin containing at least 0.5% but not more than 1.2% by mass of silicon-bonded hydrogen atoms;
e: catalyst and process for preparing same
F: inhibitors
G: filler material
And, H: an environment-friendly diluent.
2. The silicone composition according to claim 1, wherein the 20-60% linear dialkylpolysiloxane has an average of at least two vinyl groups per molecule and a molecular weight of 40-60 ten thousand.
3. The silicone composition according to claim 1, wherein the crosslinking ingredient D isⅠIs an organopolysiloxane containing at least 0.75% but not more than 1.6% by mass of silicon-bonded hydrogen atoms.
4. The silicone composition according to claim 1, wherein the crosslinking ingredient D isⅡIs an organopolysiloxane resin containing at least 0.5% but not more than 1.0% by mass of silicon-bonded hydrogen atoms.
5. The silicone composition of claim 1, wherein the catalyst is a platinum-vinylsiloxane complex, an alcohol-modified chloroplatinic acid, or a platinum-alkyne based complex.
6. The silicone composition of claim 1, wherein the inhibitor is an alkynol compound, a polyvinyl polysiloxane, an amide compound, or a maleate compound.
7. The silicone composition according to claim 1, wherein the filler is fumed silica, ultrafine PMMA powder, quartz powder, or calcium carbonate.
8. The silicone composition of claim 1, wherein the environmentally friendly diluent is an alkane solvent.
9. The silicone composition according to claim 8, wherein the alkane solvent is hexamethyldisiloxane or kerosene.
10. A PU-silicone synthetic leather, characterized in that it comprises a PU synthetic leather, on the surface of which the silicone composition according to any one of claims 1 to 9 is coated.
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| CN112522965A (en) * | 2020-11-27 | 2021-03-19 | 广东鼎立森新材料有限公司 | Organic silicon synthetic leather and preparation method thereof |
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