CN113278124A - Natural latex-like sponge and preparation method thereof - Google Patents
Natural latex-like sponge and preparation method thereof Download PDFInfo
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- CN113278124A CN113278124A CN202110589073.9A CN202110589073A CN113278124A CN 113278124 A CN113278124 A CN 113278124A CN 202110589073 A CN202110589073 A CN 202110589073A CN 113278124 A CN113278124 A CN 113278124A
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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
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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
- C08J9/06—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 chemical blowing agent
- C08J9/08—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 chemical blowing agent developing carbon dioxide
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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
- C08J9/06—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 chemical blowing agent
- C08J9/10—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 chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/102—Azo-compounds
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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
- C08J9/06—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 chemical blowing agent
- C08J9/10—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 chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/107—Nitroso compounds
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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
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
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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
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
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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
- 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)
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Polyurethanes Or Polyureas (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention discloses an imitation natural latex sponge and a preparation method thereof, and belongs to the technical field of sponge preparation. The sponge product comprises the following raw materials in parts by weight: 80-90 parts of polyether polyol, 35-40 parts of diisocyanate, 3-4 parts of water, 0.5-1.2 parts of nano antibacterial agent, 1.3-1.6 parts of silicone oil, 0.3-0.5 part of amine catalyst and 5-6 parts of foaming agent. According to the invention, the formula composition and the dosage of the high-density sponge are adjusted, so that the prepared sponge product has excellent physical and mechanical properties and durability, has good air permeability, and has comfortable and soft physical properties of natural latex.
Description
Technical Field
The invention relates to the technical field of sponge preparation, in particular to a natural latex-like sponge and a preparation method thereof.
Background
Along with the continuous improvement of the living standard of people and the continuous acceleration of the life rhythm, consumers pay more and more attention to the quality of household articles for daily use.
The traditional natural latex product has the characteristics of ultrahigh elasticity, strong touch feeling and the like, and is widely applied to the field of household living products, but the traditional natural latex product still has the defect of poor air permeability of the product, and in order to ensure the air permeability effect, the latex product is generally required to be perforated manually, but the air permeability effect which can be realized by manual perforation is not ideal; meanwhile, the conventional natural latex is very expensive.
The high-density sponge has the characteristics of absorbing external force, being fine and smooth in hand feeling, being soft and comfortable, and if the performance of the high-density sponge can be further improved and the high-density sponge has the physical properties of natural latex, the current situations of high price and poor ventilation effect of natural latex products can be remarkably improved, so that various market demands are met, and the important industrial production value is realized.
Disclosure of Invention
The invention aims to provide a natural latex-like sponge and a preparation method thereof, which are used for solving the problems in the prior art and enabling a high-density sponge to have excellent performance and physical properties of natural latex.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides an imitated natural latex sponge which comprises the following raw materials in parts by weight:
80-90 parts of polyether polyol, 35-40 parts of diisocyanate, 3-4 parts of water, 0.5-1.2 parts of nano antibacterial agent, 1.3-1.6 parts of silicone oil, 0.3-0.5 part of amine catalyst and 5-6 parts of foaming agent;
further, the molecular weight of the polyether polyol is 6000-.
Further, the amine catalyst is a mixture of N, N-dimethylcyclohexylamine and N-methyl-N- (N, N-dimethylaminoethyl) ethanolamine in a mass ratio of 1: 3-5.
Further, the foaming agent is a mixture of barium azodicarboxylate, sodium bicarbonate, pentaerythritol and dinitrosopentamethylenetetramine according to a mass ratio of 1-2:2-5:1-3: 4-6.
Further, the nano antibacterial agent is a nano antibacterial agent DOWSIL7344 additive.
The invention also provides a preparation method of the imitated natural latex sponge, which comprises the following steps:
(1) mixing polyether polyol, water, a nano antibacterial agent, silicone oil, an amine catalyst and a foaming agent according to a ratio to obtain a material A;
(2) according to the raw material ratio, stirring and mixing the diisocyanate and the material A, introducing gas while mixing, keeping the pressure at 1.3-1.5bar while mixing, and curing after stirring to obtain the natural latex-like sponge.
Further, the gas is an inert gas or air.
Further, the gas is introduced at a flow rate of 80 to 90 ml/min.
Further, the stirring rate is 4000-.
Further, the curing time is 24-48 h.
When the polyether polyol reacts with isocyanate, the polyether polyol with the molecular weight of 6000-8000 can ensure that the molecular weight of the finally formed polyisocyanate is within the range of 1000-6000, and the long molecular chain of the polyether polyol is grafted to the isocyanate to increase the functionality of the isocyanate and improve the crystallization property of the isocyanate, thereby ensuring that the sponge product realizes more uniform and fine foaming effect.
The foaming agent is a sodium bicarbonate foaming agent, and also contains barium azodicarboxylate, pentaerythritol and dinitrosopentamethylenetetramine, can ensure uniform and stable foaming, can release carbon dioxide in the preparation process, and has a good foaming effect; meanwhile, the organic components contained in the foaming agent can also enhance the tensile strength and the tearing strength of the sponge product.
The invention discloses the following technical effects:
the high-density and high-resilience sponge imitating natural latex is prepared by adjusting the formula composition and the using amount of the high-density sponge, the sponge product has the physical properties of comfort and softness of the natural latex, excellent physical and mechanical properties and durability, good air permeability, the price of the sponge product is only one fifth of that of the natural latex, the raw material composition also contains a nano antibacterial agent, the antibacterial effect can be given to the sponge product on the basis of ensuring the high density and strong resilience of the sponge product, and the sponge product can be used in the fields of shoemaking, furniture, light textile products and the like.
Detailed Description
Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but as a more detailed description of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Further, for numerical ranges in this disclosure, it is understood that each intervening value, between the upper and lower limit of that range, is also specifically disclosed. Every smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in a stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference herein for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The description and examples are intended to be illustrative only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
The "parts" in the present invention are in parts by weight unless otherwise specified.
Example 1
A natural latex-imitated sponge with high density and strong rebound resilience comprises the following raw materials in parts by weight:
80 parts of polyether polyol, 35 parts of diisocyanate, 3 parts of water, 0.5 part of nano antibacterial agent DOWSIL7344additive, 1.6 parts of silicone oil and 0.3 part of amine catalyst; 6 parts of a foaming agent;
the polyether polyol used is polyether polyol with molecular weight of 6000;
the amine catalyst is a mixture of N, N-dimethylcyclohexylamine and N-methyl-N- (N, N-dimethylaminoethyl) ethanolamine in a mass ratio of 1: 4;
the foaming agent is a mixture of barium azodicarboxylate, sodium bicarbonate, pentaerythritol and dinitrosopentamethylenetetramine according to the mass ratio of 1:2:3: 4.
The preparation method of the natural latex-like sponge with high density and strong rebound resilience comprises the following steps:
(1) uniformly mixing the polyether polyol, water, the nano antibacterial agent, the silicone oil, the amine catalyst and the foaming agent according to a ratio to obtain a material A;
(2) according to the raw material ratio, stirring and mixing the diisocyanate and the material A, introducing dry air at the speed of 80ml/min while mixing, keeping the pressure at 1.4bar during stirring and the stirring speed at 4000rpm/min, stirring for 5s, and curing for 24h after stirring is finished to obtain the sponge product.
Example 2
A natural latex-imitated sponge with high density and strong rebound resilience comprises the following raw materials in parts by weight:
90 parts of polyether polyol, 40 parts of diisocyanate, 4 parts of water, 1.3 parts of nano antibacterial agent DOWSIL7344additive, 1.3 parts of silicone oil and 0.5 part of amine catalyst; 5 parts of a foaming agent;
the polyether polyol is polyether polyol with the molecular weight of 7000;
the amine catalyst is a mixture of N, N-dimethylcyclohexylamine and N-methyl-N- (N, N-dimethylaminoethyl) ethanolamine in a mass ratio of 1: 3;
the foaming agent is a mixture of barium azodicarboxylate, sodium bicarbonate, pentaerythritol and dinitrosopentamethylenetetramine according to the mass ratio of 2:5:1: 6.
The preparation method of the natural latex-like sponge with high density and strong rebound resilience comprises the following steps:
(1) uniformly mixing the polyether polyol, water, the nano antibacterial agent, the silicone oil, the amine catalyst and the foaming agent according to a ratio to obtain a material A;
(2) according to the raw material ratio, stirring and mixing the diisocyanate and the material A, introducing dry air at the speed of 90ml/min while mixing, keeping the pressure at 1.3bar during stirring, stirring at the speed of 5000rpm/min for 6s, and curing for 48h after stirring is finished to obtain the sponge product.
Example 3
A natural latex-imitated sponge with high density and strong rebound resilience comprises the following raw materials in parts by weight:
85 parts of polyether polyol, 38 parts of diisocyanate, 3 parts of water, 0.8 part of nano antibacterial agent DOWSIL7344additive, 1.5 parts of silicone oil and 0.4 part of amine catalyst; 5 parts of a foaming agent;
the polyether polyol used is polyether polyol with molecular weight of 6500;
the amine catalyst is a mixture of N, N-dimethylcyclohexylamine and N-methyl-N- (N, N-dimethylaminoethyl) ethanolamine in a mass ratio of 1: 5;
the foaming agent is a mixture of barium azodicarboxylate, sodium bicarbonate, pentaerythritol and dinitrosopentamethylenetetramine in a mass ratio of 2:3:1: 4.
The preparation method of the natural latex-like sponge with high density and strong rebound resilience comprises the following steps:
(1) uniformly mixing the polyether polyol, water, the nano antibacterial agent, the silicone oil, the amine catalyst and the foaming agent according to a ratio to obtain a material A;
(2) according to the raw material ratio, stirring and mixing the diisocyanate and the material A, introducing dry air at the speed of 85ml/min while mixing, keeping the pressure at 1.5bar during stirring, stirring at the speed of 4500rpm/min, stirring for 7s, and curing for 36h after stirring is finished to obtain the sponge product.
Example 4
A natural latex-imitated sponge with high density and strong rebound resilience comprises the following raw materials in parts by weight:
82 parts of polyether polyol, 35 parts of diisocyanate, 4 parts of water, 1 part of nano antibacterial agent DOWSIL7344additive, 1.4 parts of silicone oil and 0.3 part of amine catalyst; 5.5 parts of a foaming agent;
the polyether polyol used is a polyether polyol with molecular weight of 8000;
the amine catalyst is a mixture of N, N-dimethylcyclohexylamine and N-methyl-N- (N, N-dimethylaminoethyl) ethanolamine in a mass ratio of 1: 3;
the foaming agent is a mixture of barium azodicarboxylate, sodium bicarbonate, pentaerythritol and dinitrosopentamethylenetetramine in a mass ratio of 2:4:2: 5.
The preparation method of the natural latex-like sponge with high density and strong rebound resilience comprises the following steps:
(1) uniformly mixing the polyether polyol, water, the nano antibacterial agent, the silicone oil, the amine catalyst and the foaming agent according to a ratio to obtain a material A;
(2) according to the raw material ratio, stirring and mixing the diisocyanate and the material A, introducing nitrogen at the speed of 80ml/min while mixing, keeping the pressure at 1.4bar during stirring and the stirring speed at 5000rpm/min, stirring for 7s, and curing for 24h after stirring is finished to obtain the sponge product.
Comparative example 1
The preparation process is identical to example 1, except that the blowing agent is replaced by cyclopentane.
Comparative example 2
The preparation process is identical to example 1, except that dinitrosopentamethylenetetramine is not present in the blowing agent.
Comparative example 3
The preparation method is the same as that of example 1, except that the amine catalyst is N, N-dimethylcyclohexylamine.
The basic properties (density), physical and mechanical properties (surface hardness, tensile strength, tear strength), support load-bearing capacity (25% IFD, support factor, ball rebound), durability (compression set) and comfort (breathability, odor, feel) of the sponge products prepared according to the inventive examples and comparative examples were examined. The results are shown in Table 1.
Wherein the test methods for sponge density, tensile strength, tear strength, 25% IFD, support factor, ball rebound, compression set, air permeability are as specified in association with ASTM D3574;
the surface hardness was measured using an AskerF durometer; odor performance was tested with reference to VDA 270.
The 25% IFD (Indentation Force Deflection Test) detection item refers to a stress value corresponding to 25% strain generated by a square sponge sample under the action of a pressure head of a testing machine. For evaluating the support of the sponge article against an object under pressure with different deformations.
The Support Factor (Support Factor) is also called comfort Factor (Sag Factor), and is a ratio of 65% IFD to 25% IFD, and the higher the value is, the better the bearing Support of the sponge is, and the comfort experience brought by the value is also higher.
The odor test was rated as follows:
1 point, hard to feel;
2 points, a slight but not unpleasant odor;
3 points, obvious smell but not unpleasant smell;
4 minutes, unpleasant smell;
5 minutes, very unpleasant smell;
6 points, intolerable odor.
The sponge samples prepared according to examples 1 to 4 of the present invention and comparative examples 1 to 3 had the property parameters shown in Table 1:
TABLE 1
As can be seen from the performance parameters in table 1: the sponge product prepared by the raw material proportion and the preparation process has high density, excellent physical and mechanical properties and durability, and better air permeability than the latex product; as can be seen from the support load bearing data, the 25% IFD, support factor, and ball rebound values for the sponge products of the present invention are within the characteristic range of the latex product, with equivalent support characteristics to the latex product.
The sponge product prepared by the invention has the remarkable characteristics of high density and strong rebound resilience, has hand feeling similar to that of a latex product, and has no obvious smell.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (9)
1. The natural latex-like sponge is characterized by comprising the following raw materials in parts by weight:
80-90 parts of polyether polyol, 35-40 parts of diisocyanate, 3-4 parts of water, 0.5-1.2 parts of nano antibacterial agent, 1.3-1.6 parts of silicone oil, 0.3-0.5 part of amine catalyst and 5-6 parts of foaming agent.
2. The simulated natural latex sponge as claimed in claim 1, wherein the molecular weight of said polyether polyol is 6000-8000.
3. The imitation natural latex sponge according to claim 1, wherein the amine catalyst is a mixture of N, N-dimethylcyclohexylamine and N-methyl-N- (N, N-dimethylaminoethyl) ethanolamine in a mass ratio of 1: 3-5.
4. The simulated natural latex sponge according to claim 1, wherein the foaming agent is a mixture of barium azodicarboxylate, sodium bicarbonate, pentaerythritol and dinitrosopentamethylenetetramine in a mass ratio of 1-2:2-5:1-3: 4-6.
5. The method of preparing the imitation natural latex sponge according to any one of claims 1 to 4, comprising the steps of:
(1) mixing polyether polyol, water, a nano antibacterial agent, silicone oil, an amine catalyst and a foaming agent according to a ratio to obtain a material A;
(2) according to the raw material ratio, stirring and mixing the diisocyanate and the material A, introducing gas while mixing, keeping the pressure at 1.3-1.5bar while mixing, and curing after stirring to obtain the natural latex-like sponge.
6. The method according to claim 5, wherein the gas is an inert gas or air.
7. The method according to claim 5, wherein the gas is introduced at a flow rate of 80 to 90 ml/min.
8. The method as claimed in claim 5, wherein the stirring rate is 4000-5000rpm/min and the stirring time is 5-7 s.
9. The process according to claim 5, wherein the aging time is 24 to 48 hours.
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| CN202110589073.9A CN113278124A (en) | 2021-05-28 | 2021-05-28 | Natural latex-like sponge and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114515029A (en) * | 2022-02-16 | 2022-05-20 | 佛山市乔姿内衣辅料有限公司 | Breathable sponge bra cup underwear |
| CN114702815A (en) * | 2022-04-13 | 2022-07-05 | 丘广财 | Breast foam bra cup material |
-
2021
- 2021-05-28 CN CN202110589073.9A patent/CN113278124A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114515029A (en) * | 2022-02-16 | 2022-05-20 | 佛山市乔姿内衣辅料有限公司 | Breathable sponge bra cup underwear |
| CN114702815A (en) * | 2022-04-13 | 2022-07-05 | 丘广财 | Breast foam bra cup material |
| CN114702815B (en) * | 2022-04-13 | 2023-08-22 | 丘广财 | Bra cup material for breast floss |
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Application publication date: 20210820 |