CN115584012A - Polyurethane composite material for foaming sealing rubber strip and preparation method thereof - Google Patents
Polyurethane composite material for foaming sealing rubber strip and preparation method thereof Download PDFInfo
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- 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
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- C08G18/30—Low-molecular-weight compounds
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- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
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- 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
- C08G18/4841—Polyethers containing oxyethylene units and other oxyalkylene units containing oxyethylene end groups
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- 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
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- 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
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- C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6688—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3271
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
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- C08G2110/00—Foam properties
- C08G2110/0083—Foam properties prepared using water as the sole blowing agent
Abstract
The invention relates to a polyurethane composite material for a foaming sealing rubber strip and a preparation method thereof, wherein the composite material comprises a component A and a component B, and the component A comprises the following raw materials in parts by weight: 60-90 parts of polyether polyol, 10-40 parts of polymer polyol, 0.8-3 parts of chain extender, 0.3-1.2 parts of foaming agent, 0.8-2.5 parts of cell opener, 0.3-0.8 part of amine catalyst, 1.5-3 parts of thickening agent, 10-22 parts of filler and 0.5-1.5 parts of foam stabilizer, wherein the component B is modified diphenylmethane diisocyanate and the weight ratio of the component B to the component A is 18-25. Compared with the prior art, the component A and the component B have thixotropy after being mixed, do not flow, can be coated on a flat plate as required after being mixed by a dispenser, have short forming time, are well bonded with the bottom surface, and have compact and smooth appearance and good sealing effect.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and relates to a polyurethane composite material for a foaming sealing rubber strip and a preparation method thereof.
Background
With the development of society, sealing materials permeate into various fields of our lives and works: the rubber sealing strip is produced to have certain pollution, and the installation sealing strip has an interface, and the installation efficiency is low, the personnel cost is high and the like.
Chinese patent CN106190000A discloses a polyurethane foam adhesive with synergistic antistatic effect, which is prepared by using trihydroxy polyoxypropylene ether, castor oil and diphenylmethane diisocyanate as main raw materials, glycerol as a chain extender and water as a foaming agent, and synthesizing a foaming type bi-component polyurethane adhesive by a prepolymerization method, wherein the A component needs prepolymerization, the process is complex, and after the A and B components are mixed, the mixed material is coated on the surface of a workpiece, and the mixture needs to be heated to 25-30 ℃ for foaming.
Disclosure of Invention
The invention aims to provide a polyurethane composite material for a foaming sealing rubber strip, which does not flow and has a determined foaming aspect ratio, and a preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
one of the technical schemes of the invention provides a polyurethane combined material for a foaming sealing rubber strip, which comprises a component A and a component B, wherein the component A comprises the following raw material components in parts by weight: 60-90 parts of polyether polyol, 10-40 parts of polymer polyol, 0.8-3 parts of chain extender, 0.3-1.2 parts of foaming agent, 0.8-2.5 parts of cell opener, 0.3-0.8 part of amine catalyst, 1.5-3 parts of thickening agent, 10-22 parts of filler and 0.5-1.5 parts of foam stabilizer;
the component B is modified diphenylmethane diisocyanate, and the weight ratio of the modified diphenylmethane diisocyanate to the component A is 18-25.
Furthermore, the polyether polyol is polyoxypropylene triol which takes glycerol as an initiator, has the weight content of primary hydroxyl of more than 70 percent and is blocked by ethylene oxide.
Furthermore, the polymer polyol adopts vinyl polyether triol as basic polyether, styrene or acrylonitrile is used for graft copolymerization, and the solid content is more than 30 percent. The solid content refers to the content of styrene or acrylonitrile in polymer polyol, the solid content of propylene and acrylonitrile is mixed and grafted on high-activity polyether polyol, the rigidity of a molecular chain can be increased, and polymer particles in a foam body are attached to a polyurethane foam network in the foaming process to play a role in enhancing a foam product. The foam cells are easy to break, the opening rate is increased, and the shrinkage phenomenon caused by the closed cells of the foam is solved.
Further, the chain extender is at least one of ethylene glycol, propylene glycol, triethanolamine TEOA or diethanolamine DEOA.
Further, the foaming agent is water.
Further, the pore forming agent is one of commercially available ZS-3602D of Nanjing Bonshan chemical engineering Co., ltd, CHK-050D of Changhua chemical technology Co., ltd, GK350D of Shanghai Gaoqiao petrochemical Co., ltd, or 10LD36GK of Lanxindong province.
Further, the amine catalyst is selected from one or more of the commercially available types A1, A33, A300, A400, 8154, NE300, MP608 or NE 1070.
Further, the thickening agent is fumed silica; the filler is one or two of light calcium carbonate, heavy calcium carbonate, talcum powder, aluminum hydroxide, silicon micropowder or diatomite; the foam stabilizer is selected from one of B8715LF or B8681 produced by Yongchuang Industrial Co.
Further, the modified diphenylmethane diisocyanate is selected from one of 8018, 8001, 8019 of the brands of watsf corporation and 2151 of the brands of watsf corporation.
The second technical scheme of the invention provides a preparation method of the polyurethane combined material for the foaming sealing rubber strip, which comprises the following steps:
mixing polyether polyol, polymer polyol, a chain extender, a foaming agent, a pore-opening agent, an amine catalyst, a thickening agent, a filler and a foam stabilizer according to a formula, stirring at a high speed for 2-3 hours, and uniformly mixing to obtain a component A;
modified diphenylmethane diisocyanate is used as the component B.
Compared with the prior art, the invention adopts high-activity ethylene oxide-terminated polypropylene oxide trihydric alcohol with primary hydroxyl content of more than 70 percent, uses the thickening agent to enable the material A to have thixotropy and not flow, and carries out crosslinking and gas generation reaction through high-activity polyether polyol, a foaming agent and the material B (isocyanate), so that the A and the B have thixotropy and do not flow after being mixed, the product can be coated on a flat plate according to requirements after being mixed by a dispenser at the temperature of 10-35 ℃, and after 10-30 minutes, the sealing strip with the height-width ratio of 1.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the concept of the invention. All falling within the scope of the present invention.
In the following examples, unless otherwise specified, all the conventional commercially available materials or conventional processing techniques in the art are indicated.
Example 1
A foaming sealant polyurethane composite material comprises a component A and a component B,
the component A comprises the following components in parts by weight:
the component A comprises: and sequentially adding the weighed 330N, CHP-H45 and ethylene glycol into a stirring kettle, starting stirring at the rotating speed of 300r/min, respectively adding the weighed B8715LF, 10LD36GK, A400, A33, A300, fumed silica, talcum powder, silicon powder and water after 15 minutes, stirring and mixing at the rotating speed of 800r/min for 2 hours at room temperature, sampling for inspection, meeting process parameters, and sending out satisfactory foam to obtain the component A. The component A has viscosity of 10000-20000mPa.s and thixotropy.
Using a dispenser, mixing the components A and B according to the ratio of A: B =5:1, and then dropping the glue solution on an electric cabinet or an electric cabinet door of a required sealing strip at the glue solution spitting speed of 3 g/s and the speed of 3000mm/min, wherein the glue solution can form a strip with the width of 14.5-15.0mm, the height of 7.0-7.5mm and the width-height ratio of 2.0:1, a resilient foam seal strip of shore 00-75 hardness tightly adhered to the base plate. Starting material prepared, if a: the material B is prepared according to the following steps of 4: dispensing at a glue-dispensing rate of 3 g/s and 3000mm/min to form a glue strip with a width of 15.0-16.0mm, a height of 7.5-8.5 and a hardness of shore 00-85, wherein if A and B are used, the ratio of the components is 5.5:1, dripping glue solution on an electric cabinet or an electric cabinet door of a required sealing strip at the speed of 3000mm/min at the glue spraying speed of 3 g/s, wherein the glue solution can form a foam sealing strip which is 14.0-15.0mm in width, 6.5-7.0mm in height and 60-70 in hardness and is tightly adhered to a bottom plate and rich in elasticity.
Example 2
A foaming sealant polyurethane composite material comprises a component A and a component B,
the component A comprises the following components in parts by weight:
and (2) component A: adding weighed 10LD76EK, H45, dipropylene glycol and TEOA into a stirring kettle in sequence, starting stirring at the rotating speed of 300r/min, respectively adding weighed B8681, 10LD36GK, NE300, 8154 and NE1070, fumed silica, aluminum hydroxide, diatomite and water after 15 minutes, stirring and mixing at the rotating speed of 800r/min at room temperature for 2 hours, sampling and inspecting to meet process parameters, and foaming to obtain a component A, wherein the viscosity of the component A is 6000-8000mPa.s and thixotropy.
Using a dispenser, mixing the components A and B according to the ratio of A: B =5:1, and then, dripping glue solution on an electric cabinet or an electric cabinet door of a required sealing strip at the speed of 3000mm/min, wherein the glue solution can form a glue solution with the width of 14.5-15mm, the height of 60-6.5mm and the width-height ratio of 2.5:1, a resilient foam seal strip of shore 00-60 hardness tightly adhered to the base plate.
Example 3
A foaming sealant polyurethane composite material comprises a component A and a component B,
the component A comprises the following raw materials in parts by weight: 35 parts of polyether polyol, 65 parts of polymer polyol, 0.8 part of chain extender, 0.3 part of foaming agent, 0.8 part of cell opener, 0.3 part of amine catalyst, 1.5 parts of thickening agent, 10 parts of filler and 0.5 part of foam stabilizer,
in the raw materials, the polyether polyol is polyoxypropylene trihydric alcohol which takes glycerin as an initiator, has the primary hydroxyl content of more than 70 percent and is blocked by ethylene oxide. The polymer polyol adopts vinyl polyether triol as basic polyether, styrene is used for graft copolymerization, and the solid content is more than 30 percent. The chain extender is triethanolamine. The foaming agent is water. The pore forming agent is ZS-3602D of the chemical industry Co., ltd of Nanjing Mount Ching which is sold on the market. The amine catalyst is a catalyst with a commercial model A1. The thickening agent is fumed silica. The filler is heavy calcium carbonate. The foam stabilizer is selected from B8715LF produced by Woodful industries GmbH.
The component B is modified diphenylmethane diisocyanate and is 8018 modified MDI produced by Nicotiana Wanhua polyurethane GmbH.
The preparation method of the foaming sealant polyurethane composite material comprises the following steps:
mixing polyether polyol, polymer polyol, a chain extender, a foaming agent, a cell opening agent, an amine catalyst, a thickening agent, a filler and a foam stabilizer according to a formula, stirring at a high speed for 2 hours, and uniformly mixing to obtain a component A;
and taking modified diphenylmethane diisocyanate as a component B.
When in use, the components A and B are mixed according to the ratio of A: B =100: and (3) uniformly mixing the components according to the mass ratio of 19, coating the components on the components by using a dispenser according to requirements, foaming the components by self, and drying the surfaces after 10 to 30 minutes to obtain the sealing strip.
Example 4
A foaming sealant polyurethane composite material comprises a component A and a component B,
the component A comprises the following raw materials in parts by weight: 75 parts of polyether polyol, 25 parts of polymer polyol, 1 part of chain extender, 1 part of foaming agent, 2 parts of cell opener, 0.5 part of amine catalyst, 3 parts of thickening agent, 20 parts of filler and 1 part of foam stabilizer,
in the raw materials, the polyether polyol is polyoxypropylene trihydric alcohol which takes glycerin as an initiator, has the primary hydroxyl content of more than 70 percent and is blocked by ethylene oxide. The polymer polyol adopts vinyl polyether triol as basic polyether, styrene is used for graft copolymerization, and the solid content is more than 30 percent. The chain extender is a mixture of triethanolamine TEOA and diethanolamine DEOA. The foaming agent is water. The cell opener is GK350D of Shanghai Gaoqiao petrochemical company sold in market. The amine catalyst is a mixture of NE300 and NE 1070. The thickener is fumed silica. The filler is diatomite. The foam stabilizer is selected from B8681 produced by Yongchun industries, inc.
The component B is modified diphenylmethane diisocyanate (MDI) produced by Nicotiana Wanhua polyurethane GmbH, model 8001.
The preparation method of the foaming sealant polyurethane composite material comprises the following steps:
mixing polyether polyol, polymer polyol, a chain extender, a foaming agent, a cell opening agent, an amine catalyst, a thickening agent, a filler and a foam stabilizer according to a formula, stirring at a high speed for 2 hours, and uniformly mixing to obtain a component A;
and taking modified diphenylmethane diisocyanate as a component B.
When in use, the components A and B are mixed according to the ratio of A: B =100: and (4) uniformly mixing the components according to a mass ratio of 25, coating the components on the components according to requirements, and carrying out self-foaming on the components, wherein the surface is dried after 10 to 30 minutes to obtain the sealing strip.
Example 5
A foaming sealant polyurethane composite material comprises a component A and a component B,
the component A comprises the following raw materials in parts by weight: 70 parts of polyether polyol, 30 parts of polymer polyol, 3 parts of chain extender, 1.2 parts of foaming agent, 2.5 parts of cell opening agent, 0.8 part of amine catalyst, 3 parts of thickening agent, 22 parts of filler and 1.5 parts of foam stabilizer,
in the raw materials, the polyether polyol is polyoxypropylene triol which takes glycerol as an initiator, has the primary hydroxyl content of more than 70 percent and is capped by ethylene oxide. The polymer polyol adopts vinyl polyether triol as basic polyether, and is graft copolymerized by acrylonitrile, and the solid content is more than 30%. The chain extender is propylene glycol. The foaming agent is water. The pore-forming agent is one of 10LD36GK in east Lanxingdong. The amine catalyst is a mixture of a commercial model A1, a33 and A300. The thickener is fumed silica. The filler is a mixture of light calcium carbonate and heavy calcium carbonate. The foam stabilizer is selected from B8681 produced by Yongchun industries, inc.
The component B is modified diphenylmethane diisocyanate and adopts modified MDI with the trade name of 2151 produced by BASF corporation.
The preparation method of the foaming sealant polyurethane composite material comprises the following steps:
mixing polyether polyol, polymer polyol, a chain extender, a foaming agent, a cell opening agent, an amine catalyst, a thickening agent, a filler and a foam stabilizer according to a formula, stirring at a high speed for 2-3h, and uniformly mixing to obtain a component A;
and taking modified diphenylmethane diisocyanate as a component B.
When in use, the components A and B are mixed according to the ratio of A: B =100:23, and coating the mixture on a part according to the requirement to foam the part automatically, and drying the surface after 10 to 30 minutes to obtain the sealing strip.
In general, the composite material prepared by the embodiment has high viscosity and thixotropy, does not flow, can be processed into a sealing strip with a height-to-width ratio of 1.
Through detection, the quality of the product produced by the composite material can reach:
hardness of 30Shore 00 to 70Shore 00
Density 0.25g/cm 3 To 0.4g/cm 3
Tensile strength of 0.05 to 0.2MPa
The elongation at break is greater than 90%.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. The polyurethane composite material for the foaming sealing rubber strip is characterized by comprising a component A and a component B, wherein the component A comprises the following raw material components in parts by weight: 60-90 parts of polyether polyol, 10-40 parts of polymer polyol, 0.8-3 parts of chain extender, 0.3-1.2 parts of foaming agent, 0.8-2.5 parts of cell opener, 0.3-0.8 part of amine catalyst, 1.5-3 parts of thickening agent, 10-22 parts of filler and 0.5-1.5 parts of foam stabilizer;
the component B is modified diphenylmethane diisocyanate, and the weight ratio of the modified diphenylmethane diisocyanate to the component A is 18-25.
2. The polyurethane composition for a foam bead sealant according to claim 1, wherein the polyether polyol is a polyoxypropylene triol having a primary hydroxyl group content of more than 70% by weight and being capped with ethylene oxide, using glycerin as an initiator.
3. The polyurethane composition for the foam sealing rubber strip as claimed in claim 1, wherein the polymer polyol is a polymer polyol which is obtained by graft copolymerization of styrene or acrylonitrile using vinyl polyether triol as a base polyether and has a solid content of more than 30%.
4. The polyurethane composition for the foam joint strip according to claim 1, wherein the chain extender is at least one of ethylene glycol, propylene glycol, triethanolamine TEOA, or diethanolamine DEOA.
5. The polyurethane composition for the foam joint strip according to claim 1, wherein the foaming agent is water.
6. The polyurethane composition for a foam joint strip according to claim 1, wherein the cell opener is commercially available from ZS-3602D of Nanjing Ching chemical engineering Co., ltd, CHK-050D of Changhua chemical technology Co., ltd, GK350D of Shanghai Gaoqiao petrochemical Co., ltd, or 10LD36GK of Lanxingdong.
7. The polyurethane composition for the foam sealing strip according to claim 1, wherein the amine catalyst is selected from one or more of commercially available types A1, A33, A300, A400, 8154, NE300, MP608 or NE 1070.
8. The polyurethane composition for the foam joint strip according to claim 1, wherein the thickener is fumed silica; the filler is one or two of light calcium carbonate, heavy calcium carbonate, talcum powder, aluminum hydroxide, silica micropowder or diatomite; the foam stabilizer is selected from one of B8715LF or B8681 produced by Yongchuang Industrial Co.
9. The polyurethane composition for a foam bead filler according to claim 1, wherein said modified diphenylmethane diisocyanate is selected from the group consisting of the products of the trademarks 8018, 8001, 8019 and 2151 from basf corporation of the trademarks wawa polyurethane gmbh.
10. The method for preparing the polyurethane composite material for the foaming joint strip according to any one of claims 1 to 9, comprising the steps of:
mixing polyether polyol, polymer polyol, a chain extender, a foaming agent, a cell opening agent, an amine catalyst, a thickening agent, a filler and a foam stabilizer according to a formula, stirring at a high speed for 2-3h, and uniformly mixing to obtain a component A;
modified diphenylmethane diisocyanate is used as the component B.
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| CN202211406450.1A CN115584012A (en) | 2022-11-10 | 2022-11-10 | Polyurethane composite material for foaming sealing rubber strip and preparation method thereof |
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| CN202211406450.1A CN115584012A (en) | 2022-11-10 | 2022-11-10 | Polyurethane composite material for foaming sealing rubber strip and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116789924A (en) * | 2023-07-07 | 2023-09-22 | 江苏米尔化工科技有限公司 | High-strength flame-retardant flexible polyurethane foam material and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116789924A (en) * | 2023-07-07 | 2023-09-22 | 江苏米尔化工科技有限公司 | High-strength flame-retardant flexible polyurethane foam material and preparation method thereof |
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Application publication date: 20230110 |