CN115536807A - Formula and preparation method of environment-friendly foaming sponge - Google Patents
Formula and preparation method of environment-friendly foaming sponge Download PDFInfo
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- CN115536807A CN115536807A CN202211335065.2A CN202211335065A CN115536807A CN 115536807 A CN115536807 A CN 115536807A CN 202211335065 A CN202211335065 A CN 202211335065A CN 115536807 A CN115536807 A CN 115536807A
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- 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
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6674—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
- C08G18/6677—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203 having at least three hydroxy groups
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- C08G18/30—Low-molecular-weight compounds
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- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
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- C08G18/40—High-molecular-weight compounds
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- 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
- C08G18/63—Block or graft polymers obtained by polymerising compounds having carbon-to-carbon double bonds on to polymers
- C08G18/632—Block or graft polymers obtained by polymerising compounds having carbon-to-carbon double bonds on to polymers onto polyethers
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
- C08G18/7621—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring being toluene diisocyanate including isomer mixtures
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
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- C08J9/0023—Use of organic additives containing oxygen
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
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- 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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- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
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- C08K5/101—Esters; Ether-esters of monocarboxylic acids
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- C08G2110/00—Foam properties
- C08G2110/0083—Foam properties prepared using water as the sole blowing agent
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- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
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- C08J2471/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
- C08J2471/02—Polyalkylene oxides
Abstract
The invention discloses a formula of an environment-friendly foaming sponge and a preparation method thereof, wherein the preparation method comprises the following steps: s1, weighing the raw materials according to the parts by weight of polyether polyol PPG3000, water, POP, triethylene diamine, bis-dimethylamino ethyl ether, silica gel, trimethylolpropane, fatty acid methyl ester, polyoxyethylene polyoxypropylene monobutyl ether and toluene diisocyanate; s2, mixing polyether polyol PPG3000, water, POP, triethylene diamine, bis-dimethylamino ethyl ether, silica gel, trimethylolpropane, fatty acid methyl ester and polyoxyethylene polyoxypropylene monobutyl ether to obtain a white material; s3, taking toluene diisocyanate as a black material; s4, pumping the white material and the black material into a foaming machine in proportion to form a mixture, and injecting the mixture into an automatic production line to form a sponge body; s5, cutting the sponge body into sponge strips, and curing for 12-48 h. And the viscosity reducer is introduced to improve the stirring efficiency.
Description
Technical Field
The invention relates to a sponge, in particular to a formula and a preparation method of an environment-friendly foaming sponge.
Background
The sponge is one kind of polyurethane foam plastic, and belongs to soft polyurethane foam plastic. Due to the porous honeycomb structure, the fabric has the characteristics of excellent flexibility, elasticity, water absorbability and water resistance, and is widely applied to various industries such as sofas, mattresses, clothes, flexible packages and the like. The sponge is a block-shaped soft foam formed by mixing polyether or polyester resin, a cross-linking agent, a foaming agent, a catalyst and a surfactant together for reaction, and is processed into products in various shapes through procedures of cutting, compounding and the like. In the production process of the sponge, methylene dichloride which is a harmful substance to the environment is used, but methylene dichloride is not used, the viscosity of the mixed liquid on the side of the polyalcohol reaches 2000 to 5000Cps (centipoise. Second), so that stirring is difficult, materials cannot be uniformly mixed, and the problem of reducing the viscosity of the mixed liquid on the side of the polyalcohol is still solved at present under the condition of not using methylene dichloride.
Disclosure of Invention
In order to overcome the defects, the invention aims to provide a formula of an environment-friendly foaming sponge and a preparation method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that: the formula of the environment-friendly foaming sponge comprises the following raw materials in parts by weight:
the isocyanate is toluene diisocyanate and is prepared by compounding 2, 4-toluene diisocyanate and 2, 6-toluene diisocyanate, wherein the 2, 4-toluene diisocyanate and the 2, 6-toluene diisocyanate are arranged according to the weight ratio of 4.
Further, the polyether polyol PPG3000 is 60.0-70.0 parts, the water is 2.1-3.5 parts, the catalyst A is 0.5-1.0 part, the catalyst B is 0.5-0.8 part, the silica gel is 0.5-1.0 part, the bridging agent is 1.5-2.5 parts, and the isocyanate is 35.0-45.0 parts.
Further, 70.0 parts of polyether polyol PPG3000, 30.0 parts of POP, 1.0 part of catalyst A, 0.8 part of catalyst B, 1.0 part of silica gel, 2.0 parts of bridging agent and 40.0 parts of isocyanate.
The viscosity reducer comprises a first viscosity reducer and a second viscosity reducer, wherein the first viscosity reducer is fatty acid methyl ester, the second viscosity reducer is polyoxyethylene polyoxypropylene monobutyl ether or a derivative thereof, the first viscosity reducer is 0.5-5.0 parts, and the second viscosity reducer is 1.0-10.0 parts.
Furthermore, the catalyst A is triethylene diamine, the catalyst B is bis-dimethylamino ethyl ether, and the bridging agent is trimethylolpropane.
A preparation method of an environment-friendly foaming sponge comprises the following steps:
s1, weighing raw materials according to the weight parts of 3000.0-80.0 parts of polyether glycol PPG, 2.0-4.0 parts of water, 25.0-40.0 parts of POP, 0.5-1.5 parts of triethylene diamine, 0.5-1.0 part of bis-dimethylamino ethyl ether, 0.5-1.5 parts of silica gel, 1.0-3.0 parts of trimethylolpropane, 0.5-5.0 parts of fatty acid methyl ester, 1.0-10.0 parts of polyoxyethylene polyoxypropylene monobutyl ether and 30.0-50.0 parts of toluene diisocyanate;
s2, pumping polyether polyol PPG3000, water, POP, triethylene diamine, bis-dimethylamino ethyl ether, silica gel, trimethylolpropane, fatty acid methyl ester and polyoxyethylene polyoxypropylene monobutyl ether into a first reaction kettle, mixing, stirring uniformly, and preserving heat at 20-25 ℃ to obtain a white material;
s3, pumping the toluene diisocyanate into a second reaction kettle, mixing, uniformly stirring, and preserving heat at 20-25 ℃ to obtain a black material;
s4, pumping the white material and the black material into a foaming machine in proportion to form a mixture, and injecting the mixture into an automatic production line to form a sponge body;
s5, cutting the sponge body into sponge strips, and curing for 12-48 h.
The beneficial effects of the invention are: the preparation method has the advantages that dichloromethane which can destroy the ozone layer is not used, so that the preparation process of the sponge is more environment-friendly, the viscosity reducer which can not influence the density is introduced, the stirring efficiency can be improved, the viscosity increase of the mixed liquid at the side of the polyalcohol is inhibited, the uniform mixing of the materials is ensured, stable foaming is provided, and the density of the existing formula can be maintained.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention, and to clearly and unequivocally define the scope of the present invention.
Example 1
The formula of the environment-friendly foaming sponge comprises the following raw materials in parts by weight:
the isocyanate is toluene diisocyanate and is prepared by compounding 2, 4-toluene diisocyanate and 2, 6-toluene diisocyanate, wherein the 2, 4-toluene diisocyanate and the 2, 6-toluene diisocyanate are arranged according to the weight ratio of 4.
Wherein: polyether polyol PPG3000 is an organic polymer having a molecular weight of about 3000, which is prepared by addition polymerization of an initiator (a compound containing an active hydrogen group) with Ethylene Oxide (EO), propylene Oxide (PO), butylene Oxide (BO), and the like in the presence of a catalyst, and is a colorless, transparent, oily, viscous liquid.
POP is vinyl polymer grafted Polyether Polyol, commonly known as polymer Polyol (POP), which is also known as white Polyether polymer Polyol, is polymer-Polyether dispersion, belongs to organic filled Polyether Polyol, and is used for preparing high-load or high-modulus soft and semi-hard polyurethane foam plastic products.
The bridging agent is trimethylolpropane.
The catalyst A is triethylene diamine.
The catalyst B is bis-dimethylamino ethyl ether.
Example 2
A preparation method of an environment-friendly foaming sponge comprises the following steps:
s1, weighing raw materials according to the weight parts of 3000 parts of PPG (polyether polyol), 3.5 parts of water, 30 parts of POP (polyether polyol), 1.0 part of triethylene diamine, 0.8 part of bis-dimethylaminoethyl ether, 1.0 part of silica gel, 2.0 parts of trimethylolpropane, 0.5 part of fatty acid methyl ester, 10.0 parts of polyoxyethylene polyoxypropylene monobutyl ether and 40 parts of toluene diisocyanate;
s2, pumping polyether polyol PPG3000, water, POP, triethylene diamine, bis-dimethylamino ethyl ether, silica gel, trimethylolpropane, fatty acid methyl ester and polyoxyethylene polyoxypropylene monobutyl ether into a first reaction kettle, mixing, stirring uniformly, and preserving heat at 20-25 ℃ to obtain a white material;
s3, pumping the toluene diisocyanate into a second reaction kettle, mixing, uniformly stirring, and preserving heat at 20-25 ℃ to obtain a black material;
s4, pumping the white material and the black material into a foaming machine in proportion to form a mixture, and injecting the mixture into an automatic production line to form a sponge body;
s5, cutting the sponge body into sponge strips, and curing for 12-48 h.
In the foaming process, dichloromethane is not volatilized any more, but dichloromethane is not used, the viscosity of the mixed liquid on the polyol side reaches 2000-5000 Cps (centipoise/second), so that stirring is difficult, materials cannot be uniformly mixed, the viscosity of the mixed liquid on the polyol side is reduced by introducing the viscosity reducer, the liquid viscosity can be inhibited from rising by the low-viscosity material which does not participate in the reaction and is similar to fatty acid methyl ester, the stirring efficiency can be maintained, but the possibility of exudation exists after the reaction of the fatty acid methyl ester without an OH group at the terminal, so the adding limit is 0.5-5 parts; therefore, the viscosity can be further reduced by adding polyoxyethylene polyoxypropylene monobutyl ether having an OH group at the end or a derivative thereof, and since this material has an OH group at the end, there is no fear of bleeding. The silicone oil is used as a foam stabilizer, so that air holes are fine and uniform, when a system is in a low viscosity stage, the silicone oil enables the hole walls to be stable/the air holes to grow to a thickness suitable for opening the holes, a condition is created for opening the holes finally, water is used as a foaming agent, the silicone oil accounts for 3% -5% of the weight of polyether in a formula, the reaction rate of water and isocyanate is higher than that of isocyanate and polyol, so that a large amount of solid polyurea is generated in the initial foaming stage, and the silicone oil is an antifoaming agent and can help opening the holes and blasting the holes; the open cell and the burst cell are the stage which is necessary for the soft foam foaming, otherwise, the closed cell phenomenon occurs, so that the foam performance is reduced; however, open cells and implosions must occur when the foaming and gelling reactions are substantially complete and in equilibrium; i.e., when the foam has risen to its highest point and the strength of the foam has been sufficient to support its own weight, which would otherwise result in collapse of the foam; therefore, another important role of the foam stabilizer is that polyurea generated by the dissolution reaction in the initial foaming stage can help opening and bursting pores in the later foaming stage, and the silicone oil DK-580MG foam stabilizer has good emulsifying capacity and can provide good pore structure and uniform density distribution.
The invention does not use methylene dichloride which can destroy the ozone layer, so that the manufacturing process of the sponge is more environment-friendly, the viscosity reducer which does not influence the density is introduced, the stirring efficiency can be improved, the viscosity increase of the mixed liquid at the side of the polyalcohol is inhibited, the uniform mixing of the materials is ensured, the stable foaming is provided, and the density of the existing formula can be maintained.
The performance test is carried out on the existing sponge finished product, and the data are as follows:
table 1: basic test items
| Serial number | Length (mm) | Width (mm) | Thickness (mm) | Weight (g) | Density (kg/m) 3 ) |
| 1 | 380 | 381 | 50 | 143 | 19.75 |
| 2 | 379 | 380 | 49 | 141 | 19.98 |
| 3 | 381 | 380 | 50 | 142 | 19.62 |
| Mean value of | 380 | 380 | 50 | 141 | 19.78 |
The cured tampons of example 2 were tested for performance with the following data:
table 2: basic test items
| Serial number | Length (mm) | Width (mm) | Thickness (mm) | Weights (g) | Density (kg/m) 3 ) |
| 1 | 382 | 380 | 46 | 132 | 19.87 |
| 2 | 380 | 380 | 50 | 142 | 19.67 |
| 3 | 381 | 380 | 51 | 145 | 19.63 |
| Mean value of | 381 | 380 | 49 | 140 | 19.72 |
From a comparison of the test data in tables 1 and 2, it follows that:
according to the invention, dichloromethane which can destroy the ozone layer is not used, the density of the sponge is almost not changed from the density, the manufacturing process of the sponge is more environment-friendly, the viscosity reducer which does not influence the density is introduced, the stirring efficiency can be improved, the viscosity increase of the mixed liquid at the side of the polyalcohol is inhibited, the uniform mixing of the materials is ensured, the stable foaming is provided, and the density of the existing formula can be maintained.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the present invention is not limited thereto, and any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (6)
1. The formula of the environment-friendly foaming sponge comprises the following raw materials in parts by weight:
the isocyanate is toluene diisocyanate and is prepared by compounding 2, 4-toluene diisocyanate and 2, 6-toluene diisocyanate, wherein the 2, 4-toluene diisocyanate and the 2, 6-toluene diisocyanate are arranged according to the weight ratio of 4.
2. The formula of the environment-friendly foaming sponge as claimed in claim 1, wherein the polyether polyol PPG3000 is 60.0-70.0 parts, the water is 2.1-3.5 parts, the catalyst A is 0.5-1.0 part, the catalyst B is 0.5-0.8 part, the silica gel is 0.5-1.0 part, the bridging agent is 1.5-2.5 parts, and the isocyanate is 35.0-45.0 parts.
3. The formula of the environment-friendly foaming sponge as claimed in claim 2, wherein the polyether polyol PPG3000 is 70.0 parts, the POP is 30.0 parts, the catalyst A is 1.0 part, the catalyst B is 0.8 part, the silica gel is 1.0 part, the bridging agent is 2.0 parts, and the isocyanate is 40.0 parts.
4. The formulation of the environmentally friendly foaming sponge according to claim 1, wherein the viscosity reducer comprises a first viscosity reducer and a second viscosity reducer, the first viscosity reducer is fatty acid methyl ester, the second viscosity reducer is polyoxyethylene polyoxypropylene monobutyl ether or a derivative thereof, wherein the first viscosity reducer is 0.5-5.0 parts, and the second viscosity reducer is 1.0-10.0 parts.
5. The formulation of the environmentally friendly foaming sponge according to any one of claims 1-4, wherein the catalyst A is triethylene diamine, the catalyst B is bis-dimethylamino ethyl ether, and the bridging agent is trimethylolpropane.
6. A preparation method of an environment-friendly foaming sponge comprises the following steps:
s1, weighing raw materials according to the weight parts of 3000.0-80.0 parts of polyether glycol PPG, 2.0-4.0 parts of water, 25.0-40.0 parts of POP, 0.5-1.5 parts of triethylene diamine, 0.5-1.0 part of bis-dimethylamino ethyl ether, 0.5-1.5 parts of silica gel, 1.0-3.0 parts of trimethylolpropane, 0.5-5.0 parts of fatty acid methyl ester, 1.0-10.0 parts of polyoxyethylene polyoxypropylene monobutyl ether and 30.0-50.0 parts of toluene diisocyanate;
s2, pumping polyether polyol PPG3000, water, POP, triethylene diamine, bis-dimethylamino ethyl ether, silica gel, trimethylolpropane, fatty acid methyl ester and polyoxyethylene polyoxypropylene monobutyl ether into a first reaction kettle, mixing, stirring uniformly, and preserving heat at 20-25 ℃ to obtain a white material;
s3, pumping the toluene diisocyanate into a second reaction kettle, mixing, uniformly stirring, and preserving heat at 20-25 ℃ to obtain a black material;
s4, pumping the white material and the black material into a foaming machine according to a proportion to form a mixture, and injecting the mixture into an automatic production line to form a sponge body;
s5, cutting the sponge body into sponge strips, and curing for 12-48 h.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH072971A (en) * | 1993-06-18 | 1995-01-06 | Mitsui Toatsu Chem Inc | Production of integral-skin-clad polyurethane foam |
| CN103835382A (en) * | 2014-03-03 | 2014-06-04 | 烟台同化防水保温工程有限公司 | Carbonized crystallized hard polyisocyanurate foam thermal insulating composite board and manufacturing method thereof |
| US20160304689A1 (en) * | 2015-04-17 | 2016-10-20 | Toyo Tire & Rubber Co., Ltd. | Polyol composition for producing flexible polyurethane foam, flexible polyurethane foam, and method for producing flexible polyurethane foam |
| CN113442364A (en) * | 2021-08-04 | 2021-09-28 | 刘杰 | Polyurethane foaming machine convenient for adjusting pressure |
| CN113754847A (en) * | 2021-09-17 | 2021-12-07 | 湖州高裕家居科技有限公司 | Environment-friendly polyurethane sponge capable of maintaining hardness |
-
2022
- 2022-10-28 CN CN202211335065.2A patent/CN115536807A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH072971A (en) * | 1993-06-18 | 1995-01-06 | Mitsui Toatsu Chem Inc | Production of integral-skin-clad polyurethane foam |
| CN103835382A (en) * | 2014-03-03 | 2014-06-04 | 烟台同化防水保温工程有限公司 | Carbonized crystallized hard polyisocyanurate foam thermal insulating composite board and manufacturing method thereof |
| US20160304689A1 (en) * | 2015-04-17 | 2016-10-20 | Toyo Tire & Rubber Co., Ltd. | Polyol composition for producing flexible polyurethane foam, flexible polyurethane foam, and method for producing flexible polyurethane foam |
| CN113442364A (en) * | 2021-08-04 | 2021-09-28 | 刘杰 | Polyurethane foaming machine convenient for adjusting pressure |
| CN113754847A (en) * | 2021-09-17 | 2021-12-07 | 湖州高裕家居科技有限公司 | Environment-friendly polyurethane sponge capable of maintaining hardness |
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