CN106560478A - Formula and preparing method of polyurethane with high water absorption and foam structure - Google Patents
Formula and preparing method of polyurethane with high water absorption and foam structure Download PDFInfo
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- CN106560478A CN106560478A CN201610628628.5A CN201610628628A CN106560478A CN 106560478 A CN106560478 A CN 106560478A CN 201610628628 A CN201610628628 A CN 201610628628A CN 106560478 A CN106560478 A CN 106560478A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4804—Two or more polyethers of different physical or chemical nature
- C08G18/4816—Two or more polyethers of different physical or chemical nature mixtures of two or more polyetherpolyols having at least three hydroxy groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4829—Polyethers containing at least three hydroxy groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4833—Polyethers containing oxyethylene units
- C08G18/4837—Polyethers containing oxyethylene units and other oxyalkylene units
- C08G18/485—Polyethers containing oxyethylene units and other oxyalkylene units containing mixed oxyethylene-oxypropylene or oxyethylene-higher oxyalkylene end groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/50—Polyethers having heteroatoms other than oxygen
- C08G18/5021—Polyethers having heteroatoms other than oxygen having nitrogen
- C08G18/5051—Polyethers having heteroatoms other than oxygen having nitrogen containing cyano groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/125—Water, e.g. hydrated salts
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/143—Halogen containing compounds
- C08J9/144—Halogen containing compounds containing carbon, halogen and hydrogen only
- C08J9/145—Halogen containing compounds containing carbon, halogen and hydrogen only only chlorine as halogen atoms
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2101/00—Manufacture of cellular products
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2110/00—Foam properties
- C08G2110/0083—Foam properties prepared using water as the sole blowing agent
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/10—Water or water-releasing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
- C08J2203/142—Halogenated saturated hydrocarbons, e.g. H3C-CF3
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/18—Binary blends of expanding agents
- C08J2203/182—Binary blends of expanding agents of physical blowing agents, e.g. acetone and butane
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention discloses a formula and a preparing method of polyurethane with high water absorption and a foam structure. The adopted raw material comprises two components A and B, and the weight ratio of A to B is (100/20):(100/110), wherein the A component is prepared from mixed polyether, a foaming agent, a chain extender and/or a cross-linking agent, a surface active agent and a catalyst, and the B component is prepared from a prepolymer modified by diphenyl methane diisocyanate and polyhydric alcohol. The preparing process comprises the steps of stirring and mixing raw materials in the component A for at least one minute, adding the component B into the mixed component A to mix for at least 5 seconds, then pouring the mixture into a mold at the temperature of 40-55 DEG C, and taking out the product after closing the mold for at least 5 min. The foam prepared through the preparing method of polyurethane with the high water absorption and the foam structure has a very good water absorption effect, and soft tactility, is suitable for application in lots of fields of makeup cotton, cleansing cotton, sole and the like, and the problems that closed pores and shrinkage occur in the production process of the foam can be avoided by matching an appropriate amount of polyhydric alcohol with low content of oxygen ethylidene unit.
Description
Technical field
The present invention relates to a kind of polyurethane material, especially a kind of high water absorption and band foam structure polyurethane
The formula and preparation method of ester.
Background technology
The proximal segment time, with the fast development in polyurethane market, client it is also proposed new requirement to polyurethane, at some
New application also begins to trial with polyurethane to substitute original some materials.As polyurethane has the hard section of soft section
Two phase structure, can obtain different performances by adjusting its polymer segment.Such as the present invention is using with more highly polar
High molecular polymer is rabbeted in polyurethane segment, so as to make it have excellent hydrophilicity, can be used for cotton pads, cleaning
Cotton, shoe pad etc. are applied.In the prior art, acrylic acid and its derivant are used the technical staff of academy and factory more, or
The Polyethylene Glycol of high molecular and the stronger acid of polarity, the such as stronger polyester of the synthesis hydrophilic such as lactic acid, carbonic acid, adipic acid, but
The problem of presence is：Prior art be generally used for coating, thin film etc. do not foam or fretting map product preparation, density is higher,
It is general that there is no foam structure, limit its field for using.
The content of the invention
For the deficiencies in the prior art, the present invention has high-hydroscopicity energy, and the poly- ammonia with foam structure by synthesis
Carbamate, effectively reduces the density of product, while foam structure can provide more excellent water absorption, can apply to
Adornment cotton, cleaning cotton, shoe pad etc. are multi-field.
The technical scheme is that：A kind of high water absorption and the formula with foam structure polyurethanes, its feature exist
In formula includes two components of A and B, and A and B mixed proportions by weight are 100/20- 100/110, wherein component A
It is made up of following component：
Admixtured polyether：100 parts, admixtured polyether is made up of polyether polyol A, polyether polyol B and polyether polyol C, wherein,
1）Polyether polyol A：Propyleneoxide-ethyleneoxide polyol or its conjugate, wherein more oxygen ethylene unit content
Not higher than 20%, average functionality is 2-4, and average hydroxyl value is 20-120mgKOH/g, and its consumption is relative to 100 parts of admixtured polyethers
The 0-30% of weight,
2）Polyether polyol B：Propyleneoxide-ethyleneoxide polyol or its conjugate, wherein more oxygen ethylene unit content
50% is not less than, average functionality is 2-4, average hydroxyl value is 20-200mgKOH/g, and its consumption is relative to 100 parts of admixtured polyethers
The 40-90% of weight,
3）Polyether polyol C：Using propyleneoxide-ethyleneoxide polyol or its with expoxy propane, oxirane in extremely
One or both of a kind of few conjugate and propylene cyanogen, styrene mixture carries out the polymer of graft copolymerization, its
Middle more oxygen ethylene unit content is not higher than 20%, and propylene cyanogen/styrene-content is 28-50%, and average functionality is 2-4, average hydroxyl
It is worth for 15-56mgKOH/g, its consumption is the 0-30% relative to 100 parts of admixtured polyether weight；
Foaming agent：Can be physical blowing agent, such as water, or CBA, such as dichloromethane, two chloroethene of a fluorine
Alkane, Pentamethylene. etc., or the mix and match of CBA and physical blowing agent, consumption is relative to 100 parts of admixtured polyether weights
The 0.3-15% of amount；
Chain extender and/or cross-linking agent：Consumption is the 0-5.5% relative to 100 parts of admixtured polyether weight；
Surfactant：Consumption is the 0.1-2.0% relative to 100 parts of admixtured polyether weight；
Catalyst, consumption are the 0.1-2.0% relative to 100 parts of admixtured polyether weight；
B component is methyl diphenylene diisocyanate and polyalcohol modified performed polymer, and its NCO% content is 15-30%, average official
Energy degree is 2.0-2.7.
As the present invention further scheme, the formula also include additive, additive selected from mill base, inner pattern releasing agent applicable,
At least one in fire retardant, filler, antistatic additive, spice, antioxidant and light stabilizer, during the additive adds component A.
A kind of high water absorption and the preparation method with foam structure polyurethanes, it is characterised in that its preparation process is：
Component A is added in an agitating device and it is that more than 2000rpm, the vertical stirrer with stirring slurry head are mixed with rotating speed
It is bonded to less after 1 minute, adds B component to be mixed together at least 5 seconds, then pours the mixture in the mould that temperature is 40-55 DEG C,
Mold closing takes out product after at least 5 minutes.
As foam density range obtained in after the further scheme of the present invention, component A and B component hybrid reaction it is
0.03-
0.3g/cm3。
As the further scheme of the present invention, add the liquid material temperature before B component reaction control at 25 ± 3 DEG C.
Used as the further scheme of the present invention, preparation process can molding in a mold, it is also possible to freely send out in atmosphere
Type is soaked, process tolerance is wide, and obtained foam has very excellent soaking effect.
Beneficial effects of the present invention are：Obtained foam density range after A and B hybrid reactions is 0.03- by the present invention
0.3g/
cm3, can molding in a mold, it is also possible to free foaming molding in atmosphere, process tolerance is wide, obtained foam tool
There is very excellent soaking effect.Reaction system after A/B material mixing can be made using the higher polyhydric alcohol of more oxygen ethylene unit content
Into foam there is extraordinary soaking effect, and with soft sense of touch, it is adaptable to which cotton pads, cleaning cotton, shoe pad etc. are more
The application in field, then the relatively low polyhydric alcohol of appropriate more oxygen ethylene unit content of arranging in pairs or groups can avoid foam from occurring in process of production
Closed pore and the problem shunk.
Specific embodiment
Below the specific embodiment of the present invention is described further：
High water absorption provided by the present invention and the polyurethanes with foam structure, produce the raw material such as following table institute for adopting
Show：
Formulation content and water suction weight table
1）Component A：
Polyether polyol A propyleneoxide-ethyleneoxide polyol or its conjugate, wherein more oxygen ethylene unit content is
15%, average functionality is 3, and average hydroxyl value is 56mgKOH/g
Polyether polyol B propyleneoxide-ethyleneoxide polyol or its conjugate, wherein more oxygen ethylene unit content is
75%, average functionality is 3, and average hydroxyl value is 40mgKOH/g
Polyether polyol C propyleneoxide-ethyleneoxide polyol or its conjugate and propylene cyanogen/styrene or both
Mixing graft copolymers are formed, and wherein more oxygen ethylene unit content is 15%, and propylene cyanogen/styrene-content is 40%, average official
Energy degree is 3, and average hydroxyl value is 25mgKOH/g
Surfactant A：The TEGOSTAB B8002 of Evonik
Chain extender B：BDO commercially available prod
Cross-linking agent C：Diethanolamine commercially available prod
Catalyst A：The Dabco 33LV of Air Products companies
Catalyst B：The Dabco DC8154 of Air Products companies
Foaming agent A：Water
Foaming agent B：Dichloromethane commercially available prod
2）B component：The CW5596 C-B of BASF AG's production, the NCO content with about 26.2% weight, degree of functionality is about
2.3。
The present invention production process be：Component A is added in a 2L plastic beaker, and with a rotating speed is
3000rpm, the vertical stirrer mixing of the round stirring slurry head with 7cm diameters are subsequently adding B component for 1 minute and mix rapidly 5- together
8 seconds, pour the mixture in the aluminum mould of the 10cm*20cm*10cm that temperature is 40-55 DEG C, mold closing takes out product after 5 minutes
Product.Liquid material temperature before unreacted should be controlled at 25 ± 3 DEG C therebetween；The product that reaction is obtained is carried out after ripening 72 hours
Water absorbing properties are tested.
Water suction weight test：The foam of epidermis 5cm*5cm*10cm will be removed, immersed after weighing in 25 DEG C of water, the depth of water
5cm, places 24 hours and takes out from water, weigh weight deduct before weight as absorb water weight.
Learnt by test result, the foam that the method that the present invention is provided is manufactured, absorb water weight>170g, and on the market
Common foam test result only has 50-80g, and water absorbing properties are far longer than common foam.
Merely illustrating the principles of the invention described in above-described embodiment and description and most preferred embodiment, without departing from this
On the premise of spirit and scope, the present invention also has various changes and modifications, and these changes and improvements both fall within requirement and protect
In the scope of the invention of shield.
Claims (6)
1. a kind of high water absorption and the formula with foam structure polyurethanes, it is characterised in that formula includes two groups of A and B
Point, and A and B mixed proportions by weight are 100/20- 100/110, wherein component A is made up of following component：
Admixtured polyether：100 parts, admixtured polyether is made up of polyether polyol A, polyether polyol B and polyether polyol C, wherein,
1）Polyether polyol A：Propyleneoxide-ethyleneoxide polyol or its conjugate, wherein more oxygen ethylene unit content
Not higher than 20%, average functionality is 2-4, and average hydroxyl value is 20-120mgKOH/g, and its consumption is relative to 100 parts of admixtured polyethers
The 0-30% of weight,
2）Polyether polyol B：Propyleneoxide-ethyleneoxide polyol or its conjugate, wherein more oxygen ethylene unit content
50% is not less than, average functionality is 2-4, average hydroxyl value is 20-200mgKOH/g, and its consumption is relative to 100 parts of admixtured polyethers
The 40-90% of weight,
3）Polyether polyol C：Using propyleneoxide-ethyleneoxide polyol or its with expoxy propane, oxirane in extremely
One or both of a kind of few conjugate and propylene cyanogen, styrene mixture carries out the polymer of graft copolymerization, its
Middle more oxygen ethylene unit content is not higher than 20%, and propylene cyanogen/styrene-content is 28-50%, and average functionality is 2-4, average hydroxyl
It is worth for 15-56mgKOH/g, its consumption is the 0-30% relative to 100 parts of admixtured polyether weight；
Foaming agent：Consumption is the 0.3-15% relative to 100 parts of admixtured polyether weight；
Chain extender and/or cross-linking agent：Consumption is the 0-5.5% relative to 100 parts of admixtured polyether weight；
Surfactant：Consumption is the 0.1-2.0% relative to 100 parts of admixtured polyether weight；
Catalyst, consumption are the 0.1-2.0% relative to 100 parts of admixtured polyether weight；
B component is methyl diphenylene diisocyanate and polyalcohol modified performed polymer, and its NCO% content is 15-30%, average official
Energy degree is 2.0-2.7.
2. high water absorption according to claim 1 and the formula with foam structure polyurethanes, it is characterised in that：It is described
Formula also includes additive, and additive is selected from mill base, inner pattern releasing agent applicable, fire retardant, filler, antistatic additive, spice, antioxidant and light
At least one in stabilizer, during the additive adds component A.
3. high water absorption according to claim 1 and the preparation method with foam structure polyurethanes, it is characterised in that
Its preparation process is：Component A is added in an agitating device and it is more than 2000rpm, band stirring slurry head with rotating speed
Vertical stirrer mix at least 1 minute after, add B component be mixed together at least 5 seconds, then pouring the mixture into temperature is
In 40-55 DEG C of mould, mold closing takes out product after at least 5 minutes.
4. high water absorption according to claim 3 and the preparation method with foam structure polyurethanes, it is characterised in that：
After component A and B component hybrid reaction, obtained foam density range is 0.03-0.3g/cm3。
5. high water absorption according to claim 3 and the preparation method with foam structure polyurethanes, it is characterised in that：
Add the liquid material temperature before B component reaction control at 25 ± 3 DEG C.
6. high water absorption according to claim 3 and the preparation method with foam structure polyurethanes, it is characterised in that：
The preparation process adopts free foaming molding in atmosphere.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107501508A (en) * | 2017-08-29 | 2017-12-22 | 广州艾科新材料股份有限公司 | A kind of soft bubble polyurethane material of water proof type hydrolysis |
| CN109456457A (en) * | 2018-11-19 | 2019-03-12 | 江苏钟山化工有限公司 | It is used to prepare the sponge material and preparation method thereof of color inhibition cotton pads |
| CN109880042A (en) * | 2019-03-15 | 2019-06-14 | 韩泽宇 | A kind of polyurethane cotton-padded shoes pad and preparation method thereof |
| CN109966156A (en) * | 2019-03-14 | 2019-07-05 | 龚海棠 | A kind of oil absorbent piece and its preparation process |
| CN112961304A (en) * | 2021-03-11 | 2021-06-15 | 江苏钟山化工有限公司 | Method for preparing polyurethane foam capable of rapidly settling in water |
| CN113174027A (en) * | 2021-05-10 | 2021-07-27 | 广东足迹鞋业有限公司 | Combined insole, forming device and forming process thereof |
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| CN101016368A (en) * | 2006-12-06 | 2007-08-15 | 北京科聚化工新材料有限公司 | Method of preparing full MDI polyurethane slow rebound foam |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107501508A (en) * | 2017-08-29 | 2017-12-22 | 广州艾科新材料股份有限公司 | A kind of soft bubble polyurethane material of water proof type hydrolysis |
| CN109456457A (en) * | 2018-11-19 | 2019-03-12 | 江苏钟山化工有限公司 | It is used to prepare the sponge material and preparation method thereof of color inhibition cotton pads |
| CN109966156A (en) * | 2019-03-14 | 2019-07-05 | 龚海棠 | A kind of oil absorbent piece and its preparation process |
| CN109880042A (en) * | 2019-03-15 | 2019-06-14 | 韩泽宇 | A kind of polyurethane cotton-padded shoes pad and preparation method thereof |
| CN112961304A (en) * | 2021-03-11 | 2021-06-15 | 江苏钟山化工有限公司 | Method for preparing polyurethane foam capable of rapidly settling in water |
| CN112961304B (en) * | 2021-03-11 | 2022-06-28 | 江苏钟山新材料有限公司 | Method for preparing polyurethane foam capable of rapidly settling in water |
| CN113174027A (en) * | 2021-05-10 | 2021-07-27 | 广东足迹鞋业有限公司 | Combined insole, forming device and forming process thereof |
| CN113174027B (en) * | 2021-05-10 | 2022-12-16 | 广东足迹鞋业有限公司 | Combined insole, forming device and forming process thereof |
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Application publication date: 20170412 |