CN117659329A - Polyurethane sponge and preparation method and application thereof - Google Patents
Polyurethane sponge and preparation method and application thereof Download PDFInfo
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- CN117659329A CN117659329A CN202410107684.9A CN202410107684A CN117659329A CN 117659329 A CN117659329 A CN 117659329A CN 202410107684 A CN202410107684 A CN 202410107684A CN 117659329 A CN117659329 A CN 117659329A
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- polyurethane sponge
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- polyurethane
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- 239000004814 polyurethane Substances 0.000 title claims abstract description 59
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 33
- 229920005862 polyol Polymers 0.000 claims abstract description 32
- 150000003077 polyols Chemical class 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- -1 polysiloxane Polymers 0.000 claims abstract description 21
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 18
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000003054 catalyst Substances 0.000 claims abstract description 8
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 7
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 7
- 125000005442 diisocyanate group Chemical group 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 19
- 229920000570 polyether Polymers 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 9
- 239000008103 glucose Substances 0.000 claims description 9
- 229920005610 lignin Polymers 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000002270 dispersing agent Substances 0.000 claims description 8
- WERYXYBDKMZEQL-UHFFFAOYSA-N 1,4-butanediol Substances OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 7
- KWYHDKDOAIKMQN-UHFFFAOYSA-N N,N,N',N'-tetramethylethylenediamine Chemical group CN(C)CCN(C)C KWYHDKDOAIKMQN-UHFFFAOYSA-N 0.000 claims description 7
- 229920005906 polyester polyol Polymers 0.000 claims description 7
- 239000004305 biphenyl Substances 0.000 claims description 6
- 235000010290 biphenyl Nutrition 0.000 claims description 6
- 238000005187 foaming Methods 0.000 claims description 6
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 claims description 6
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 6
- HVLLSGMXQDNUAL-UHFFFAOYSA-N triphenyl phosphite Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)OC1=CC=CC=C1 HVLLSGMXQDNUAL-UHFFFAOYSA-N 0.000 claims description 6
- 238000005422 blasting Methods 0.000 claims description 5
- 238000004080 punching Methods 0.000 claims description 5
- 239000002537 cosmetic Substances 0.000 claims description 4
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 3
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 3
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 3
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 2
- KXBFLNPZHXDQLV-UHFFFAOYSA-N [cyclohexyl(diisocyanato)methyl]cyclohexane Chemical compound C1CCCCC1C(N=C=O)(N=C=O)C1CCCCC1 KXBFLNPZHXDQLV-UHFFFAOYSA-N 0.000 claims description 2
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000006260 foam Substances 0.000 abstract description 24
- 239000003795 chemical substances by application Substances 0.000 abstract description 16
- 230000000704 physical effect Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000011148 porous material Substances 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000011347 resin Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 6
- 239000012948 isocyanate Substances 0.000 description 6
- 150000002513 isocyanates Chemical class 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 239000003381 stabilizer Substances 0.000 description 4
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 3
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 description 3
- 239000004088 foaming agent Substances 0.000 description 3
- 238000009827 uniform distribution Methods 0.000 description 3
- NMDKWAQVRNUKQH-UHFFFAOYSA-N 2-benzylnaphthalene-1-sulfonic acid formaldehyde Chemical compound C=O.C(C1=CC=CC=C1)C1=C(C2=CC=CC=C2C=C1)S(=O)(=O)O NMDKWAQVRNUKQH-UHFFFAOYSA-N 0.000 description 2
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002683 reaction inhibitor Substances 0.000 description 2
- 238000007086 side reaction Methods 0.000 description 2
- 239000000600 sorbitol Substances 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 241001481296 Malus spectabilis Species 0.000 description 1
- 241001477893 Mimosa strigillosa Species 0.000 description 1
- 241001184198 Orthosiphon Species 0.000 description 1
- 229920000616 Poly(1,4-butylene adipate) Polymers 0.000 description 1
- 229920002323 Silicone foam Polymers 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- WNLRTRBMVRJNCN-UHFFFAOYSA-L adipate(2-) Chemical compound [O-]C(=O)CCCCC([O-])=O WNLRTRBMVRJNCN-UHFFFAOYSA-L 0.000 description 1
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- RNSLCHIAOHUARI-UHFFFAOYSA-N butane-1,4-diol;hexanedioic acid Chemical compound OCCCCO.OC(=O)CCCCC(O)=O RNSLCHIAOHUARI-UHFFFAOYSA-N 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000004177 elastic tissue Anatomy 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 210000000497 foam cell Anatomy 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000002649 leather substitute Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000013514 silicone foam Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Abstract
The invention belongs to the technical field of polyurethane material preparation, and particularly relates to a polyurethane sponge and a preparation method and application thereof. The polyurethane sponge provided by the invention comprises the following raw materials in parts by weight: 55-60 parts of polyol, 15-20 parts of dihydroxyl end-capped polysiloxane, 2-5 parts of functional auxiliary agent, 12-14 parts of diisocyanate, 0.72-0.81 part of water, 1.05-1.8 parts of catalyst and 0.3-1.0 part of antioxidant. The polyurethane sponge provided by the invention has the advantages that no foam homogenizing agent, anti-sticking agent and the like are required to be added in the preparation process, the production cost is low, the process is simple, the prepared polyurethane sponge has fine and dense foam pores, is uniformly distributed, has excellent physical properties, is not easy to deform and damage, and has soft texture, comfortable hand feeling and good skin friendliness.
Description
Technical Field
The invention belongs to the technical field of polyurethane material preparation, and particularly relates to a polyurethane sponge and a preparation method and application thereof.
Background
Conventional cosmetic sponge materials are typically natural latex or chemically synthesized latex, such as styrene-butadiene rubber. Natural latex has high elasticity, but has poor water absorbability, does not expand and become large when meeting water, and has serious chip falling in the use process; while Styrene Butadiene Rubber (SBR) has good water absorption and high elasticity, and the preparation process needs to add vulcanizing agent and the like, so that the odor is high.
And Polyurethane (PUR) is a polymer having urethane segment repeating structural units made from the reaction of an isocyanate with a polyol. PUR products are classified into two main types, namely foamed products and non-foamed products, wherein the foamed products comprise soft, hard and semi-hard PUR foamed plastics; non-foamed articles include coatings, adhesives, synthetic leather, elastomers, elastic fibers, and the like. The PUR material has excellent performance, wide application and various products, wherein the use amount of the PUR foam plastic is the most wide. The PUR foam plastic is commonly called sponge, is prepared by polymerizing and foaming isocyanate and hydroxyl compound, and can be divided into soft and hard according to the hardness, wherein the soft is a main variety, and has excellent elasticity, softness, elongation and compression strength; good chemical stability, resistance to many solvents and oils; the wear resistance is excellent and is 20 times larger than that of natural sponge; also has excellent processability, heat insulation, adhesion and other properties, and is a good raw material for cosmetic tools.
At present, the polyurethane sponge is mainly prepared from polyester polyol, polyether polyol and isocyanate, and a plurality of assistants such as foam homogenizing agent, anti-sticking agent and the like are added in the preparation process to play roles in stabilizing foam and adjusting foam cells, so that the preparation cost is increased, and the production operation is more complicated. For example, chinese patent CN 106700030B discloses a polyurethane for a slow rebound sponge and a preparation method and application thereof, wherein the resin comprises a resin a component, a resin B1 component and a resin B2 component, the resin a component comprises a polyol a, a cross-linking agent, a catalyst, a foaming agent and a foam homogenizing agent; the resin B1 comprises 100 parts of isocyanate B, 10-40 parts of polyol B, 0.002-0.010 part of side reaction inhibitor, and the resin B2 comprises 100 parts of isocyanate B2, 50-100 parts of polyol B and 0.002-0.010 part of side reaction inhibitor. The preparation method takes organic silicon as a foam homogenizing agent to protect bubbles.
For another example, chinese patent application CN102942673a discloses a composition for preparing sponge powder puff and a preparation method thereof, which comprises a prepolymer component and a foaming agent component in a mass ratio of 100:50-100, wherein: the prepolymer component is prepared by the cool reaction of polyether polyol, a reactive hardening agent and toluene diisocyanate; the foaming agent component consists of distilled water and an organosilicon surfactant. Although the sponge prepared by the method has fine and uniform foam holes and good hydrophilicity, the obtained sponge has the defects of high hardness, poor handfeel comfort and the like.
Based on the above, the invention provides a polyurethane sponge preparation method which does not need to add a foam stabilizer and has excellent physical properties.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a polyurethane sponge and a preparation method and application thereof. The polyurethane sponge provided by the invention does not need to be added with additives such as foam homogenizing agent, anti-sticking agent and the like in the preparation process, has low production cost and simple process, and the prepared polyurethane sponge has fine and dense pore foam, uniform distribution, excellent physical properties, difficult deformation and damage, soft texture, comfortable hand feeling and good skin affinity.
The technical scheme of the invention is as follows:
the polyurethane sponge comprises the following raw materials in parts by weight: 55-60 parts of polyol, 15-20 parts of dihydroxyl end-capped polysiloxane, 2-5 parts of functional auxiliary agent, 12-14 parts of diisocyanate, 0.72-0.81 part of water, 1.05-1.8 parts of catalyst and 0.3-1.0 part of antioxidant.
Further, the functional auxiliary agent consists of glucose, a dispersing agent CNF and lignin according to the weight ratio of 2:1:1.
Further, the polyatomic alcohol is polyester polyatomic alcohol and polyether polyatomic alcohol; the weight ratio of the polyester polyol to the polyether polyol is 4:1-2.
Further, the polyester polyol is poly (1, 4-butylene adipate) glycol with a number average molecular weight of 2000-3000; the polyether polyol is polyether polyol 330N.
The poly (1, 4-butanediol adipate) glycol and the polyether polyol 330N adopted by the invention are conventional reagents in the prior art and can be purchased in conventional manufacturers.
In the existing polyurethane sponge preparation process, under the combined action of gravity and surface tension, liquid films forming bubble walls can drain to adjacent bubble gaps, so that the bubble walls are thinned, bubbles are easy to break or merge into large bubbles, and finally collapse or coarse holes are caused, so that a foam homogenizing agent is required to be added in the preparation process to stabilize foam and regulate the foam holes. The inventor discovers that the polyester polyol and the polyether polyol with specific proportions are used as main raw materials, and simultaneously the dihydroxyl end-capped polysiloxane and the functional auxiliary agent consisting of glucose, a dispersing agent CNF (benzylnaphthalene sulfonic acid formaldehyde condensate) and lignin are added for reaction, so that the overall viscosity of a reaction system is moderate, a surface active layer with higher viscosity is formed between two gas-liquid interfaces, a bubble liquid film has excellent elasticity and moderate viscosity, the liquid discharge phenomenon is weakened, bubbles in the reaction system of the polyurethane sponge can be stabilized under the condition that a foam homogenizing agent is not required to be added, foam which is rich and fine and can exist stably is generated, and finally the prepared polyurethane sponge has fine bubbles and uniform distribution.
Meanwhile, the dihydroxyl end-capped polysiloxane added in the reaction process can also participate in the synthesis of a main chain, so that the water absorption performance of the obtained polyurethane sponge is moderate, the water (the water in water emulsion and the like) on the face of a user is not easy to suck in the process of dressing, the whole dressing effect is better, and the dressing appearance is longer.
Further, the polyurethane sponge consists of the following components in parts by weight: 58 parts of polyol, 18 parts of dihydroxyl terminated polysiloxane, 4 parts of functional auxiliary agent, 13 parts of diisocyanate, 0.8 part of water, 1.5 parts of catalyst and 0.6 part of antioxidant.
Further, the catalyst is tetramethyl ethylenediamine.
Further, the antioxidant is one of triphenyl phosphite and diphenyl isooctyl phosphite.
Further, the diisocyanate is one of toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, dicyclohexylmethane diisocyanate and hexamethylene diisocyanate.
The invention also provides a preparation method of the polyurethane sponge, which comprises the following steps:
s1, controlling the temperature of each raw material to be 30-35 ℃, and then injecting each raw material into a mixing cavity of a high-pressure foaming machine through a pump according to the weight proportion;
s2, injecting air into the mixing cavity and stirring the raw materials, wherein the stirring speed is 4000-5000 r/min, the stirring time is 2-4S, and the raw materials are discharged into the conveying die cavity after being uniformly stirred;
s3, conveying the sponge at the set speed of the conveying line of 4.0-5.0 m/min, cutting off the sponge when the length of the sponge reaches 60 m, and conveying the sponge to a designated position for curing;
s4, cutting the sponge after the sponge is completely cured, and blasting and punching to obtain the product.
Furthermore, the invention also provides application of the polyurethane sponge in preparing cosmetic materials.
Compared with the prior art, the polyurethane sponge and the preparation method and application thereof provided by the invention have the following advantages:
(1) The polyurethane sponge prepared by the invention is prepared by reacting polyester polyol and polyether polyol which are used as main raw materials with isocyanate and simultaneously adding dihydroxy end-capped polysiloxane and functional auxiliary agent which are used as reaction raw materials, and the whole process is free from adding auxiliary agents such as foam homogenizing agent, anti-sticking agent and the like, and has the advantages of simple preparation process and low production cost, and can enable the reaction system of the polyurethane sponge to generate abundant, fine and stable foam under the condition of not adding the foam homogenizing agent and the anti-sticking agent, and the prepared polyurethane sponge has fine bubbles and uniform distribution.
(2) The polyurethane sponge provided by the invention has excellent physical properties, is not easy to deform and damage, is soft in texture, comfortable in hand feeling, good in skin-friendly property, good in elasticity and moderate in hardness, and can better fit skin when being used as a make-up tool, so that the make-up is lighter and more natural.
Drawings
FIG. 1 is a polyurethane sponge obtained in example 3 of the present invention.
Detailed Description
The invention is further illustrated by the following description of specific embodiments, which are not intended to be limiting, and various modifications or improvements can be made by those skilled in the art in light of the basic idea of the invention, but are within the scope of the invention as long as they do not depart from the basic idea of the invention.
In the following examples and comparative examples, the reagents not specifically described were conventional reagents, and were purchased from conventional reagent manufacturing and selling companies, and part of the raw material information and manufacturers were as follows:
dihydroxy terminated polysiloxane, CAS number: 70131-67-8 from Shanghai Seiyaka Biotechnology Co., ltd, cat# T22990;
polyether polyol 330N: hydroxyl value 33.0-37.0 mgKOH/g, purchased from Jining Malus spectabilis chemical Co., ltd;
polyadipic acid-1, 4-butanediol ester diol, CAS number: 150923-12-9: the number average molecular weight is 2000-3000, and the number average molecular weight is purchased from North Xinyu macro biological medicine technology Co., ltd;
dispersant CNF (benzyl naphthalene sulfonic acid formaldehyde condensate), available from wuhanol biotechnology limited;
lignin, CAS number: 9005-53-2; sodium lignin sulfonate, CAS number: 8061-51-6;
glucose, CAS number: 58367-01-4; sorbitol, CAS number: 50-70-4;
organosilicon foam stabilizer AK-8805, available from Shandong Orthosiphon Li Long chemical Co.
Example 1:
a polyurethane sponge consists of the following raw materials in parts by weight: polyol 55 kg, dihydroxy terminated polysiloxane 15 kg, functional aid 2 kg, diphenylmethane diisocyanate 12 kg, water 0.72 kg, tetramethyl ethylenediamine 1.05 kg, triphenyl phosphite 0.3 kg.
The polyatomic alcohol is composed of polyadipic acid-1, 4-butanediol ester glycol with the number average molecular weight of 2000 and polyether polyol 330N according to the weight ratio of 4:1.
The functional auxiliary agent consists of glucose, a dispersing agent CNF and lignin according to the weight ratio of 2:1:1.
The preparation method of the polyurethane sponge comprises the following steps:
s1, controlling the temperature of each raw material to 30 ℃, and then injecting each raw material into a mixing cavity of a high-pressure foaming machine through a pump according to the weight proportion;
s2, injecting air into the mixing cavity and stirring the raw materials, wherein the stirring speed is 4000 r/min, the stirring time is 2S, and the raw materials are discharged into the conveying die cavity after being uniformly stirred;
s3, conveying the sponge at the set speed of 4.0 m/min by a conveying line, cutting off the sponge when the length of the sponge reaches 60 m, and conveying the sponge to a designated position for curing;
s4, cutting the sponge after the sponge is completely cured, and blasting and punching to obtain the product.
Example 2:
a polyurethane sponge consists of the following raw materials in parts by weight: polyol 60 kg, dihydroxy terminated polysiloxane 20 kg, functional aid 5 kg, hexamethylene diisocyanate 14 kg, water 0.81 kg, tetramethyl ethylenediamine 1.8 kg, diphenyl isooctyl phosphite 1.0 kg.
The polyatomic alcohol is composed of polyadipic acid-1, 4-butanediol ester glycol with the number average molecular weight of 3000 and polyether polyol 330N according to the weight ratio of 4:2.
The functional auxiliary agent consists of glucose, a dispersing agent CNF and lignin according to the weight ratio of 2:1:1.
The preparation method of the polyurethane sponge comprises the following steps:
s1, controlling the temperature of each raw material to 35 ℃, and then injecting each raw material into a mixing cavity of a high-pressure foaming machine through a pump according to the weight proportion;
s2, injecting air into the mixing cavity and stirring the raw materials, wherein the stirring speed is 5000 r/min, the stirring time is 4S, and the raw materials are discharged into the conveying die cavity after being uniformly stirred;
s3, conveying the sponge at a speed of 5.0 m/min by a conveying line, cutting off the sponge when the length of the sponge reaches 60 m, and conveying the sponge to a designated position for curing;
s4, cutting the sponge after the sponge is completely cured, and blasting and punching to obtain the product.
Example 3:
a polyurethane sponge consists of the following raw materials in parts by weight: polyol 58 kg, dihydroxy terminated polysiloxane 18 kg, functional aid 4 kg, toluene diisocyanate 13 kg, water 0.8 kg, tetramethyl ethylenediamine 1.5 kg, diphenyl isooctyl phosphite 0.6 kg.
The polyatomic alcohol is composed of polyadipic acid-1, 4-butanediol ester glycol with the number average molecular weight of 2000 and polyether polyol 330N according to the weight ratio of 4:2.
The functional auxiliary agent consists of glucose, a dispersing agent CNF and lignin according to the weight ratio of 2:1:1.
The preparation method of the polyurethane sponge comprises the following steps:
s1, controlling the temperature of each raw material to 33 ℃, and then injecting each raw material into a mixing cavity of a high-pressure foaming machine through a pump according to the weight proportion;
s2, injecting air into the mixing cavity and stirring the raw materials, wherein the stirring speed is 4500 r/min, the stirring time is 3S, and the raw materials are discharged into the conveying die cavity after being uniformly stirred;
s3, conveying the sponge at the set speed of the conveying line of 4.5 m/min, cutting off the sponge when the length of the sponge reaches 60 m, and conveying the sponge to a designated position for curing;
s4, cutting the sponge after the sponge is completely cured, and blasting and punching to obtain the product.
Comparative example 1:
a polyurethane sponge consists of the following raw materials in parts by weight: 58 kg of polyether polyol 330N, 18 kg of dihydroxyl terminated polysiloxane, 4 kg of functional auxiliary agent, 13 kg of toluene diisocyanate, 0.8 kg of water, 1.5 kg of tetramethyl ethylenediamine and 0.6 kg of diphenyl isooctyl phosphite.
Comparative example 1 was different from example 3 in that no poly (1, 4-butylene glycol) adipate was added to the polyol, only polyether polyol 330N was added, and the other components were prepared in the same manner as in example 3.
Comparative example 2:
a polyurethane sponge consists of the following raw materials in parts by weight: polyol 58 kg, organosilicon foam stabilizer AK-8805 kg, functional auxiliary agent 4 kg, toluene diisocyanate 13 kg, water 0.8 kg, tetramethyl ethylenediamine 1.5 kg, diphenyl isooctyl phosphite 0.6 kg. The polyatomic alcohol is composed of polyadipic acid-1, 4-butanediol ester glycol with the number average molecular weight of 2000 and polyether polyol 330N according to the weight ratio of 4:2. The functional auxiliary agent consists of glucose, a dispersing agent CNF and lignin according to the weight ratio of 2:1:1.
Comparative example 2 was different from example 3 in that no dihydroxy-terminated polysiloxane was added to the components, and the silicone foam stabilizer AK-8805 was added at the same time, and the other components were prepared in the same manner as in example 3.
Comparative example 3:
comparative example 3 was different from example 3 in that glucose in the functional auxiliary agent was replaced with sorbitol, and the other components were the same as those of example 3.
Comparative example 4:
comparative example 4 was different from example 3 in that lignin in the functional auxiliary agent was replaced with sodium lignin sulfonate, and other components were the same as those of example 3.
Test example one, physical properties test of polyurethane sponge of the present invention:
1. the test method comprises the following steps:
(1) Density (kg/m) 3 ): according to the method in national standard GB/T6343-2009, determination of apparent density of foam plastics and rubber;
(2) Tensile strength (kPa) and elongation at break (%): the method is used for measuring according to the method in national standard GB/T6344-2008 soft foam polymer material tensile strength and elongation at break;
(3) Pore bubble structure: by observing the cross sections of the polyurethane sponges prepared in the examples and comparative examples of the present invention;
(4) Water absorption (%): the water absorption is the weight of water absorbed by the water absorbing material per unit weight. The expression is as follows: water absorption% = (m 2 -m 1 )/m 1 ×100%；
(5) Hardness (HA): the measurement was performed by using a sponge durometer (LX-F type).
2. The test results are shown in table 1:
TABLE 1
As can be seen from Table 1, the polyurethane sponge obtained in examples 1-3 of the present invention has the characteristics of fine and uniform pore size and distribution, and also has excellent properties such as density, tensile strength, elongation at break, etc., is not easy to deform and damage, has moderate hardness, has good elasticity and good skin-friendly property, and can better fit the skin.
When the components in the polyurethane sponge provided by the invention are changed in comparative examples 1-4, the prepared polyurethane sponge has the conditions of different pore sizes or uneven distribution and the like, and other physical properties are reduced to different degrees.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention.
Claims (10)
1. The polyurethane sponge is characterized by comprising the following raw materials in parts by weight: 55-60 parts of polyol, 15-20 parts of dihydroxyl end-capped polysiloxane, 2-5 parts of functional auxiliary agent, 12-14 parts of diisocyanate, 0.72-0.81 part of water, 1.05-1.8 parts of catalyst and 0.3-1.0 part of antioxidant.
2. The polyurethane sponge according to claim 1, wherein the functional auxiliary agent consists of glucose, dispersant CNF and lignin in a weight ratio of 2:1:1.
3. A polyurethane sponge according to claim 1, wherein the polyatomic alcohol consists of polyester polyol and polyether polyol in a weight ratio of 4:1-2.
4. A polyurethane sponge according to claim 3 wherein the polyester polyol is a polyadipic acid-1, 4-butanediol ester diol having a number average molecular weight of 2000 to 3000; the polyether polyol is polyether polyol 330N.
5. The polyurethane sponge according to claim 1, which comprises the following components in parts by weight: 58 parts of polyol, 18 parts of dihydroxyl terminated polysiloxane, 4 parts of functional auxiliary agent, 13 parts of diisocyanate, 0.8 part of water, 1.5 parts of catalyst and 0.6 part of antioxidant.
6. A polyurethane sponge according to claim 1, wherein the catalyst is tetramethyl ethylenediamine.
7. A polyurethane sponge according to claim 1, wherein the antioxidant is one of triphenyl phosphite and diphenyl isooctyl phosphite.
8. The polyurethane sponge of claim 1, wherein the diisocyanate is one of toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate.
9. A method for preparing a polyurethane sponge according to any one of claims 1 to 8, comprising the steps of:
s1, controlling the temperature of each raw material to be 30-35 ℃, and then injecting each raw material into a mixing cavity of a high-pressure foaming machine through a pump according to the weight proportion;
s2, injecting air into the mixing cavity and stirring the raw materials, wherein the stirring speed is 4000-5000 r/min, the stirring time is 2-4S, and the raw materials are discharged into the conveying die cavity after being uniformly stirred;
s3, conveying the sponge at the set speed of the conveying line of 4.0-5.0 m/min, cutting off the sponge when the length of the sponge reaches 60 m, and conveying the sponge to a designated position for curing;
s4, cutting the sponge after the sponge is completely cured, and blasting and punching to obtain the product.
10. Use of the polyurethane sponge according to any one of claims 1 to 8 for the preparation of cosmetic materials.
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| CN202410107684.9A CN117659329B (en) | 2024-01-26 | Polyurethane sponge and preparation method and application thereof |
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| CN202410107684.9A CN117659329B (en) | 2024-01-26 | Polyurethane sponge and preparation method and application thereof |
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