CN108728034B - Polyester polyether adhesive - Google Patents
Polyester polyether adhesive Download PDFInfo
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- CN108728034B CN108728034B CN201810612790.7A CN201810612790A CN108728034B CN 108728034 B CN108728034 B CN 108728034B CN 201810612790 A CN201810612790 A CN 201810612790A CN 108728034 B CN108728034 B CN 108728034B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/06—Polyurethanes from polyesters
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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
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
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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
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
- C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
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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
- C08G18/4841—Polyethers containing oxyethylene units and other oxyalkylene units containing oxyethylene end 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
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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
- C08G18/65—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
- C08G18/6603—Compounds of groups C08G18/42, C08G18/48, or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6607—Compounds of groups C08G18/42, C08G18/48, or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
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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
- C08G18/70—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
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
- C08G18/791—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups
- C08G18/794—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups formed by oligomerisation of aromatic isocyanates or isothiocyanates
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/08—Polyurethanes from polyethers
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- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention relates to a polyester polyether adhesive, comprising by weight: 100-300 parts of polyester polyol, 100-200 parts of polyether polyol, 80-160 parts of polycaprolactone, 80-150 parts of ethylene-octene copolymer, 150-350 parts of isocyanate compound, 100-200 parts of organic solvent and 43-63 parts of assistant; the method of making the polyester polyether adhesive comprises: s1, providing polyester polyol, polyether polyol, polycaprolactone, ethylene-octene copolymer, isocyanate compound, organic solvent and auxiliary agent; s2, adding polyester polyol, polyether polyol, polycaprolactone, an isocyanate compound and an organic solvent into a stirrer in proportion, mixing and stirring uniformly at 30-50 ℃, adding an auxiliary agent in proportion, heating a reaction system to 80-100 ℃, and carrying out heat preservation reaction for 1-3h to obtain the polyester-polyether adhesive. The polyester polyether adhesive has good adhesion effect after being solidified for a short time and a long time, has good rebound resilience, has strong scratch resistance and crack resistance, and can be used in a low-temperature environment.
Description
Technical Field
The invention relates to a polyester polyether adhesive, belonging to the technical field of macromolecules.
Background
Adhesives, as well as tapes, are commonly used to bond two substrates together to form a bonded composite. While a large number of adhesives and tapes are available, the development of substrate and end-use requirements continues to drive the need for new adhesive formulations and tape constructions. When metal materials such as stainless steel, aluminum alloy and the like are bonded, the difficulty is that the viscosity is high and the thickness of a glue film is difficult to control; the initial viscosity is poor, and the gel time is long. In addition, most of conventional adhesives cannot be used in a low-temperature environment, and when the temperature of the use environment is low, the adhesive activity of the adhesive is low, and the bonded portion is easily cracked.
Disclosure of Invention
The invention aims to provide an adhesive which can be used in a low-temperature environment, has high viscosity and short gel time.
In order to achieve the purpose, the invention provides the following technical scheme: a polyester polyether adhesive comprising by weight: 100-300 parts of polyester polyol, 100-200 parts of polyether polyol, 80-160 parts of polycaprolactone, 80-150 parts of ethylene-octene copolymer, 150-350 parts of isocyanate compound, 100-200 parts of organic solvent and 43-63 parts of assistant; the method of making the polyester polyether adhesive comprises:
s1, providing the polyester polyol, the polyether polyol, the polycaprolactone, the isocyanate compound, the organic solvent and the auxiliary agent;
s2, adding the polyester polyol, the polyether polyol, the polycaprolactone, the ethylene-octene copolymer, the isocyanate compound and the organic solvent into a stirrer in proportion, mixing and stirring uniformly at 30-50 ℃, adding the auxiliary agent in proportion, heating the reaction system to 80-100 ℃, and carrying out heat preservation reaction for 1-3h to obtain the polyester-polyether adhesive.
Further, the isocyanate compound is a diisocyanate having a viscosity of 20 to 500CPS/25 ℃.
Further, the isocyanate compound is polymethylene polyphenyl isocyanate having a viscosity of 50 to 200CPS/25 ℃.
Further, the polyester polyol is synthesized by condensing one or more organic acids with 2-8 carbon atoms and one or more of ethylene glycol, propylene glycol, diethylene glycol, trimethylolpropane, pentaerythritol and 1, 4-butanediol.
Further, the polyester polyol is synthesized by condensing one or more of phthalic acid, adipic acid and halogenated phthalic acid and one or more of ethylene glycol, propylene glycol, diethylene glycol, trimethylolpropane, pentaerythritol and 1, 4-butanediol, has an average hydroxyl functionality of 2.5-4.0 and a number average molecular weight of 800-.
Further, the polyether polyol has one or more structural units of ethylene oxide, methyl propylene glycol, propylene oxide or butylene oxide, an average hydroxyl functionality of 2.5-4.0, and a number average molecular weight of 800-.
Further, the polyether polyol is a two-component polyether polyol, which is respectively: (1) the high-activity high-functionality polyether polyol is obtained by the polycondensation of methyl propylene glycol (MPO), wherein the functionality of hydroxyl is 3, the number average molecular weight is 4000, and the viscosity is 1CPS/25 ℃; (2) obtained by polycondensation of ethylene oxide, propylene oxide and butylene oxide, having a number average molecular weight of 4800, a hydroxyl functionality of 3 and a hydroxyl number of 34.
Further, the auxiliary agent comprises a chain extender, a foaming agent and a plasticizer, wherein the content of the chain extender in the auxiliary agent is 10-40 wt%, the content of the foaming agent in the auxiliary agent is 15-45 wt%, and the content of the plasticizer in the auxiliary agent is 12-40 wt%.
Further, the mass ratio of the chain extender to the foaming agent is 1:1-2: 3; the mass ratio of the chain extender to the plasticizer is 1:1-4: 5.
Further, the polyester polyether binder meets one or more of the following requirements: (1) the chain extender is one or more of ethylene glycol, 1, 4-butanediol and neopentyl glycol; (2) the organic solvent is selected from acetone, cyclohexane, dimethyl sulfoxide and ethyl acetate; (3) the foaming agent is an organic foaming agent; (4) the plasticizer is phthalate plasticizer, and comprises di (2-ethylhexyl) phthalate, dioctyl phthalate, di-n-octyl phthalate, butyl benzyl phthalate, di-sec-octyl phthalate, dicyclohexyl phthalate, dibutyl phthalate, diisobutyl phthalate, dimethyl phthalate, diethyl phthalate, diisononyl phthalate, and diisodecyl phthalate.
In one embodiment of the present invention, the polyester polyether adhesive further comprises 20 to 30 parts of silicone oil, which means a linear polysiloxane that remains in a liquid state at room temperature.
Further, the silicone oil is selected from methyl silicone oil, ethyl silicone oil, phenyl silicone oil, methyl hydrogen-containing silicone oil, methyl phenyl silicone oil, methyl chlorophenyl silicone oil, methyl ethoxy silicone oil, methyl trifluoro propyl silicone oil, methyl vinyl silicone oil, methyl hydroxyl silicone oil, ethyl hydrogen-containing silicone oil, hydroxyl hydrogen-containing silicone oil and cyanogen-containing silicone oil.
Compared with the prior art, the invention has the beneficial effects that: the polyester polyether adhesive disclosed by the invention takes 200 parts of polyester polyol, polyether polyol, polycaprolactone, an ethylene-octene copolymer, an isocyanate compound, 100 parts of an organic solvent and an auxiliary agent as main components, has a good adhesive effect after being solidified for a short time and a long time, has good rebound resilience, has strong scratch resistance and crack resistance and can be used in a low-temperature environment.
The foregoing is a summary of the present invention, and in order to provide a clear understanding of the technical means of the present invention and to be implemented in accordance with the present specification, the following is a detailed description of the preferred embodiments of the present invention.
Detailed Description
The following examples further illustrate the embodiments of the present invention in detail. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Unless otherwise stated, the materials taken are as follows:
polyether polyol A: the high-activity high-functionality polyether polyol obtained by the polycondensation of methyl propylene glycol (MPO) has the hydroxyl functionality of 3, the number average molecular weight of 4000 and the viscosity of 1CPS/25 ℃, and is purchased from Hongbaoli chemical industry Co.
Polyether polyol B: a polyether polyol available from dow chemical under the trade designation VOANOL CP 4702 obtained by the polycondensation of ethylene oxide, propylene oxide and butylene oxide and having a number average molecular weight of 4800, a hydroxyl functionality of 3 and a hydroxyl number of 34.
Polyether polyol C: EP-210 polyether polyol, which is a propylene oxide polymerized ethylene oxide capped polyether polyol having a hydroxyl functionality of 3 and a number average molecular weight of 3200, is available from Guangzhou Fufei chemical Co., Ltd.
Polyester polyol A: the polyester polyol PE1 is obtained by condensation reaction of adipic acid, isophthalic acid, 1, 2-propanediol and 1, 4-butanediol, and has a number average molecular weight of 1000 and a viscosity of 1.6CPS/25 deg.C, and is purchased from Hongbaoli chemical company, Inc. of Foshan city.
Polyester polyol B: the polyester polyol PE2 is obtained by condensation reaction of adipic acid, terephthalic acid, diethylene glycol, neopentyl glycol and ethylene glycol, and has a number average molecular weight of 1000 and a viscosity of 1.2CPS/25 ℃, and is purchased from Hongbaoli chemical industry Co., Ltd.
Polycaprolactone: purchased from Lang Biotech, Suzhou, Inc.
Isocyanate compound (b): polymethylene polyphenyl isocyanates, polymeric MDI for short, are available from Bayer under the product designation DESMODUR 44V 20L.
Silicone oil A: linear polydimethylsiloxane having a number average molecular weight of 6000, available from Santa Pont Silicone technologies, Inc. of Laiyang.
Foaming agent: sodium lauryl sulfate, purchased from Junshi chemical industries.
Plasticizer: di (2-ethylhexyl) phthalate, available from borui chemical (shanghai) ltd.
Ethylene-octene copolymer: purchased from dow, usa.
Example 1:
according to the formula shown in table 1, adding the polyether polyol, the polyester polyol, the ethylene-octene copolymer and the chain extender in the parts of the raw material composition, starting stirring, heating to 35 +/-2 ℃, sequentially adding the other raw materials in the parts of the raw material composition after 10 minutes, controlling the reaction temperature to be 80 +/-5 ℃, keeping the temperature for 1 hour, starting monitoring the viscosity, sampling once every half hour, cooling to below 30 ℃ after the viscosity reaches 3000 +/-250 mPa.s/25 ℃, and discharging.
Table 1: material formulation of example 1
The viscosity of the product is 3000 +/-250 mPa.s/25 ℃ through detection.
Example 2
This example differs from example 1 in that the ingredient table described in table 2 is adopted.
Table 2: material formulation of example 2
| Material(s) | Selection of species | Dosage per gram |
| Polyether polyol first component | Polyether polyol A | 200 |
| Polyether polyol second component | Is free of | ---- |
| Polycaprolactone | 190 | |
| Ethylene-octene copolymer | 100 | |
| Polyester polyols | Polyester polyol A | 250 |
| Chain extender | 1, 4-butanediol | 20 |
| Silicone oil | Silicone oil A | 15 |
| Isocyanate compound | Polymeric MDI | 180 |
| Solvent(s) | Cyclohexane | 180 |
| Plasticizer | Di (2-ethylhexyl) phthalate | 20 |
| Foaming agent | Sodium dodecyl sulfate | 25 |
The viscosity of the product is measured to be 3100 +/-250 mPa.s/25 ℃.
Example 3
This example differs from example 1 in that the ingredient table described in table 3 is adopted.
Table 3: material formulation of example 3
The viscosity of the product is measured to be 3100 +/-250 mPa.s/25 ℃.
Example 4
This example differs from example 1 in that the ingredient table described in table 4 is adopted.
Table 4: material formulation of example 4
| Material(s) | Selection of species | Dosage per gram |
| Polyether polyol first component | Polyether polyol C | 130 |
| Polyether polyol second component | Polyether polyol A | 70 |
| Polycaprolactone | 220 | |
| Ethylene-octene copolymer | 95 | |
| Polyester polyols | Polyester polyol A | 180 |
| Chain extender | Ethylene glycol | 15 |
| Silicone oil | Silicone oil A | 6 |
| Isocyanate compound | Polymeric MDI | 180 |
| Solvent(s) | Cyclohexane | 160 |
| Plasticizer | Di (2-ethylhexyl) phthalate | 6 |
| Foaming agent | Sodium dodecyl sulfate | 20 |
The viscosity of the product is measured to be 3100 +/-250 mPa.s/25 ℃.
Example 5
This example differs from example 1 in that the ingredient table described in table 5 is adopted.
Table 5: material formulation of example 5
| Material(s) | Selection of species | Dosage per gram |
| Polyether polyol first component | Polyether polyol A | 50 |
| Polyether polyol second component | Polyether polyol B | 100 |
| Polycaprolactone | 150 | |
| Ethylene-octene copolymer | 110 | |
| Polyester polyols | Polyester polyol B | 150 |
| Chain extender | Ethylene glycol | 15 |
| Silicone oil | Silicone oil A | 9.3 |
| IsocyanatesAcid ester compound | Polymeric MDI | 160 |
| Solvent(s) | Cyclohexane | 120 |
| Plasticizer | Di (2-ethylhexyl) phthalate | 8 |
| Foaming agent | Sodium dodecyl sulfate | 18 |
The viscosity of the product is measured to be 3100 +/-250 mPa.s/25 ℃.
Example 6
In this example, the set time of each group of binders was evaluated. The test method is carried out according to the national standard GB/T7124-2008 of the people's republic of China. Standard test plates were made according to the standard method and the adhesion force was measured for 15 minutes, 3 hours, 6 hours, 12 hours and 24 hours, respectively, and each set of the test was performed in five replicates at a test temperature of 25 ℃. The tensile shear strength (MPa) for each example is recorded and is reported in table 6.
Table 6: the failure loads of the adhesives of examples 1-5 were at different times.
As can be seen from the data in Table 6, the adhesives of examples 1-2 had poor tensile shear strength at shorter bonding times, but tended to level off and be higher at longer times. The short setting times of examples 3-4 have better tensile shear strength, but the tensile shear strength after long setting times is conversely not as high as that of examples 1-2. Example 5 has higher tensile shear strength at shorter bonding times and also has higher tensile shear strength at longer times than examples 1-2, resulting in better bonding results.
The adhesives of examples 3-4 had a clear color after bonding and were essentially invisible on the stainless steel surface.
Example 7
In this example, the tensile shear strength of each group of adhesives at low temperature environment was evaluated. The test method is carried out according to the national standard GB/T7124-2008 of the people's republic of China. Standard test panels were made according to the standard method and the adhesion forces at-100 c, -80 c, -60 c, -40 c and-20 c after 24 hours of bonding were measured, respectively, and each set of tests was run in five replicates, respectively. The tensile shear strength (MPa) for each example is recorded and is reported in table 7.
Table 7:
as can be seen from the data in Table 7, examples 1, 2 and 5 still have better tensile shear strength and adhesion at ultra low temperatures (less than-60 deg.C), and can be used in low temperature environments.
In summary, the following steps: the polyester polyether adhesive disclosed by the invention takes 200 parts of polyester polyol, polyether polyol, polycaprolactone, an ethylene-octene copolymer, an isocyanate compound, 100 parts of an organic solvent and an auxiliary agent as main components, has a good adhesive effect after being solidified for a short time and a long time, has good rebound resilience, has strong scratch resistance and crack resistance and can be used in a low-temperature environment.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (5)
1. A polyester polyether adhesive, wherein the polyester polyether adhesive comprises by weight: 100-300 parts of polyester polyol, 100-200 parts of polyether polyol, 80-160 parts of polycaprolactone, 80-150 parts of ethylene-octene copolymer, 150-350 parts of isocyanate compound, 100-200 parts of organic solvent and 43-63 parts of assistant; wherein the isocyanate compound is diisocyanate, the viscosity of the diisocyanate is 20-500cps/25 ℃, or the isocyanate compound is polymethylene polyphenyl isocyanate, the viscosity of the polymethylene polyphenyl isocyanate is 50-200cps/25 ℃; the polyester polyol is synthesized by condensing one or more of phthalic acid, adipic acid and halogenated phthalic acid with one or more of ethylene glycol, propylene glycol, diethylene glycol, trimethylolpropane, pentaerythritol and 1, 4-butanediol, the average hydroxyl functionality of the polyester polyol is 2.5-4.0, and the number average molecular weight of the polyester polyol is 800-2400; the polyether polyol has structural units of one or more of ethylene oxide, methyl propylene glycol, propylene oxide or butylene oxide, an average hydroxyl functionality of 2.5 to 4.0, and a number average molecular weight of 800-:
s1, providing the polyester polyol, the polyether polyol, the polycaprolactone, the isocyanate compound, the organic solvent and the auxiliary agent;
s2, adding the polyester polyol, the polyether polyol, the polycaprolactone, the ethylene-octene copolymer, the isocyanate compound and the organic solvent into a stirrer in proportion, mixing and stirring uniformly at 30-50 ℃, adding the auxiliary agent in proportion, heating a reaction system to 80-100 ℃, and carrying out heat preservation reaction for 1-3h to obtain the polyester polyether adhesive.
2. The polyester polyether adhesive of claim 1 wherein the polyether polyol is a two-part polyether polyol, each of which is: (1) the high-activity high-functionality polyether polyol is obtained by the polycondensation of methyl propylene glycol (MPO), the functionality of hydroxyl is 3, and the number average molecular weight is 4000; (2) obtained by polycondensation of ethylene oxide, propylene oxide and butylene oxide, having a number average molecular weight of 4800, a hydroxyl functionality of 3 and a hydroxyl number of 34.
3. The polyesterpolyether adhesive of claim 1, wherein the additives comprise a chain extender, a blowing agent and a plasticizer, the chain extender is present in the additive in an amount of 10 to 40 wt%, the blowing agent is present in the additive in an amount of 15 to 45 wt%, and the plasticizer is present in the additive in an amount of 12 to 40 wt%.
4. The polyesterpolyether adhesive of claim 3, wherein the mass ratio of the chain extender to the blowing agent is from 1:1 to 2: 3; the mass ratio of the chain extender to the plasticizer is 1:1-4: 5.
5. The polyester polyether adhesive of claim 3 or 4, wherein the polyester polyether adhesive meets one or more of the following requirements: (1) the chain extender is one or more of ethylene glycol, 1, 4-butanediol and neopentyl glycol; (2) the organic solvent is selected from acetone, cyclohexane, dimethyl sulfoxide and ethyl acetate; (3) the foaming agent is an organic foaming agent; (4) the plasticizer is phthalate plasticizer, including dioctyl phthalate, butyl benzyl phthalate, di-sec-octyl phthalate, dicyclohexyl phthalate, dibutyl phthalate, diisobutyl phthalate, dimethyl phthalate, diethyl phthalate, diisononyl phthalate, diisodecyl phthalate.
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| CN201810612790.7A CN108728034B (en) | 2018-06-14 | 2018-06-14 | Polyester polyether adhesive |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810612790.7A CN108728034B (en) | 2018-06-14 | 2018-06-14 | Polyester polyether adhesive |
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| CN108728034B true CN108728034B (en) | 2021-04-27 |
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| EP2062927B1 (en) * | 2007-11-20 | 2016-06-29 | Henkel AG & Co. KGaA | 2K-PU adhesive for low temperature applications |
| CN102634318B (en) * | 2012-05-02 | 2013-12-25 | 江苏华大新材料有限公司 | Low-temperature-resisting solvent type polyurethane bonding agent and preparation method thereof |
| CN106753171A (en) * | 2016-12-06 | 2017-05-31 | 庄爱芹 | polyurethane binder and preparation method thereof |
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