Water-based automotive interior adhesive with good heat resistance and preparation method thereof

Abstract

The invention discloses a water-based automotive interior adhesive with good heat resistance. The water-based automotive interior adhesive is prepared from the following components in parts by weight: polyester polyol, polyether polyol, isocyanate, a micromolecular chain extender, a hydrophilic chain extender, a neutralizer, acetone, deionized water, an amine chain extender, carbodiimide, a defoaming agent, a wetting agent and a thickening agent. The polyester polyol is one or two of polycarbonate diol, PBA2000 (Polybutylece Architecture 2000), Gaou YH-3666-1 (YH-3666-1) and Gaou YH-3666-2 (YH-3666-2). The preparation method comprises the following steps: preparing a water-based polyurethane dispersion with better heat resistance by using polycarbonate diol, Gaogang YH-3666-1, Gaogang YH-3666-2, isocyanate and micromolecular polyol as raw materials, adding carbodiimide, a wetting agent and a defoaming agent according to a ratio, mixing, and finally adjusting the viscosity of the product by using a thickening agent. The water-based automotive interior adhesive with proper viscosity is prepared.

Description

Technical Field

[0001] The invention relates to the technical field of automobile interior adhesives, and in particular to a water-based automobile interior adhesive with good heat resistance and a preparation method thereof. Background Art

[0002] Water-based automotive interior adhesive is mainly used for bonding PVC sheets, carpets, fabrics, double-sided fabrics, leather, etc. for automotive interiors. It can be used for bonding and pressing ABS, ABS / PC boards, fibers, SMC, wood composites and other substrates, such as car roofs, door interiors, luggage racks, pillar interiors, etc., and can be used for vacuum forming processes. However, the existing water-based automotive interior adhesive is mainly prepared by the reaction of polyester polyols and isocyanates. Because it is easy to hydrolyze at high temperatures, it has poor heat resistance and cannot meet the problem of stable bonding requirements for automotive interiors.

[0003] In view of this, the present invention is proposed. Summary of the invention

[0004] The purpose of the present invention is to provide a water-based automotive interior adhesive with good heat resistance and a preparation method thereof, which has high heat resistance, and the coated sample has a good initial temperature resistance at 50°C, and the final temperature resistance effect 72 hours after curing is also good, thereby solving the above-mentioned technical problems existing in the prior art.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A heat-resistant automotive interior adhesive comprising the following components in parts by weight:

[0007]

[0008]

[0009] The polyester polyol is one or two of polycarbonate diol, PBA2000, Gaomeng YH-3666-1 and Gaomeng YH-3666-2.

[0010] Preferably, in the above adhesive, the carbodiimide is made of PCDI X3900, Langyi At least one of CA-01.

[0011] Preferably, in the above adhesive, the polyether polyol is one or more of PEG2000, PPG1000 and PTMEG2000.

[0012] Preferably, in the above adhesive, the isocyanate is one of MDI and IPDI.

[0013] Preferably, in the above adhesive, the small molecule polyol is one or more of 1.4-butanediol, octylpentanediol, 1.6-hexanediol, and trimethylolpropane.

[0014] Preferably, in the above adhesive, the hydrophilic chain extender is one or two of DMPA, DMBA and AAS salt.

[0015] Preferably, in the above adhesive, the neutralizing agent is one of sodium hydroxide, ammonia water and triethylamine.

[0016] Preferably, in the above adhesive, the amine chain extender is one or two of isophoronediamine, ethylenediamine, diethylenetriamine and triethylenetetramine.

[0017] Preferably, in the above adhesive, the defoaming agent is at least one of Digo 810 and Sangjing Chemical 2590;

[0018] The wetting agent is at least one of Sangjing Chemical 440 and AFCONA3588;

[0019] The thickener is at least one of Rohm and Haas alkali swelling ASE-60, Hemingway DeuRheo WT-105A, and Rohm and Haas RM-8W.

[0020] A method for preparing a water-based automotive interior adhesive with good heat resistance, comprising:

[0021] Take various raw materials according to the formula of the automobile interior adhesive with good heat resistance described in the present invention;

[0022] The polyester polyol and polyether polyol in the raw materials are put into a prepolymer bottle, dehydrated at 120°C and -0.1Mpa for 20 minutes, cooled to about 80°C, added with isocyanate and reacted at normal pressure for 1 hour, then added with small molecule chain extender, hydrophilic chain extender and catalyst and reacted at 75°C for 2-4 hours until the -NCO content reaches the theoretical value and diluted with solvent, and then dispersed at high speed, and neutralizer, deionized water and amine chain extender are added under high-speed dispersion conditions, and dispersed at high speed for 30 minutes to obtain an aqueous polyurethane dispersion, and acetone in the aqueous polyurethane dispersion is removed to obtain an emulsion with a solid content of 40%, and carbonized diamine is added to the emulsion and stirred at a speed of 500r / min for 30 minutes, and a defoamer and a wetting agent are added in turn and stirred at a speed of 500r / min for 30 minutes, and finally a thickener is added in small amounts and multiple times to obtain an aqueous adhesive with a suitable viscosity, that is, an aqueous automotive interior adhesive with good heat resistance.

[0023] Compared with the prior art, the water-based automotive interior adhesive with good heat resistance and the preparation method thereof provided by the present invention have the following beneficial effects:

[0024] By using the polyester polyol with good heat resistance from Gaomeng in the adhesive synthesis process, the heat resistance of the glue can be effectively improved. At the same time, the use of carbodiimide in the compounding can further improve the temperature resistance of the product, so that the initial temperature resistance of the coated sample is good at 50°C, and the final temperature resistance effect is also good 72 hours after curing, achieving the effect of good temperature resistance and high adhesion, and well solving the problem of poor temperature resistance of existing water-based automotive interior adhesives. This product has good environmental advantages, can be activated at lower temperatures, and has excellent bonding and heat resistance. DETAILED DESCRIPTION

[0025] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in combination with the specific content of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, which does not constitute a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0026] First, the terms that may be used in this article are explained as follows:

[0027] The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y means both “X” or “Y” and “X and Y”.

[0028] The terms "include", "comprises", "contains", "has" or other descriptions with similar semantics should be interpreted as non-exclusive inclusion. For example, including certain technical feature elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.) should be interpreted as including not only certain technical feature elements explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

[0029] The term "consisting of..." means excluding any technical feature elements not explicitly listed. If this term is used in a claim, it will make the claim closed, so that it does not contain technical feature elements other than the technical feature elements explicitly listed, except for the conventional impurities related to them. If this term only appears in a clause of a claim, it only limits the elements explicitly listed in the clause, and the elements recorded in other clauses are not excluded from the overall claim.

[0030] The term "parts by mass" refers to the mass ratio relationship between multiple components. For example, if it is described that component X is x parts by mass and component Y is y parts by mass, then the mass ratio of component X to component Y is x:y. 1 part by mass can represent any mass, for example, 1 part by mass can be represented as 1 kg or 3.1415926 kg. The sum of the parts by mass of all components is not necessarily 100 parts, but can be greater than 100 parts, less than 100 parts or equal to 100 parts. Unless otherwise specified, the parts, proportions and percentages described herein are all measured by mass.

[0031] When concentration, temperature, pressure, size or other parameters are expressed in the form of a numerical range, the numerical range should be understood to specifically disclose all ranges formed by the pairing of any upper limit, lower limit, and preferred value in the numerical range, regardless of whether the range is explicitly stated; for example, if a numerical range of "2 to 8" is stated, the numerical range should be interpreted as including ranges such as "2 to 7", "2 to 6", "5 to 7", "3 to 4 and 6 to 7", "3 to 5 and 7", "2 and 5 to 7", etc. Unless otherwise specified, the numerical ranges stated herein include both their end values ​​and all integers and fractions within the numerical range.

[0032] The scheme provided by the present invention is described in detail below. The contents not described in detail in the embodiments of the present invention belong to the prior art known to professionals in the field. If the specific conditions are not specified in the embodiments of the present invention, they are carried out according to the conventional conditions in the field or the conditions recommended by the manufacturer. If the manufacturers are not specified in the reagents or instruments used in the embodiments of the present invention, they are all conventional products that can be purchased commercially.

[0033] The embodiment of the present invention provides a water-based automotive interior adhesive with good heat resistance, comprising the following components in parts by weight:

[0034]

[0035] The polyester polyol is one or two of polycarbonate diol, PBA2000, Gaomeng YH-3666-1 and Gaomeng YH-3666-2.

[0036] The water-based automotive interior adhesive of the present invention uses the heat-resistant polyester homemade by Gaomeng as a raw material, and is later combined with carbodiimide and additives to finally obtain a water-based automotive interior adhesive with suitable viscosity. The product has good environmental advantages, can be activated at a lower temperature, and has excellent bonding and heat resistance.

[0037] In some specific embodiments of the present invention, the carbodiimide used in the water-based automotive interior adhesive is PCDI X3900 from Jiadida, Langyi At least one of CA-01.

[0038] In some specific embodiments of the present invention, the polyether polyol used in the above-mentioned water-based automotive interior adhesive is one or more of PEG2000, PPG1000 and PTMEG2000.

[0039] In some specific embodiments of the present invention, the isocyanate used in the above-mentioned water-based automotive interior adhesive is one of MDI and IPDI.

[0040] In some specific embodiments of the present invention, the small molecule polyol used in the above-mentioned water-based automotive interior adhesive is one or more of 1.4-butanediol, octanediol, 1.6-hexanediol, and trimethylolpropane.

[0041] In some specific embodiments of the present invention, the hydrophilic chain extender used in the water-based automotive interior adhesive is one or two of DMPA, DMBA and AAS salt.

[0042] In some specific embodiments of the present invention, the neutralizer used in the water-based automotive interior adhesive is one of sodium hydroxide, ammonia water and triethylamine.

[0043] In some specific embodiments of the present invention, the amine chain extender raw material used in the above-mentioned water-based automotive interior adhesive is one or two of isophoronediamine, ethylenediamine, diethylenetriamine and triethylenetetramine.

[0044] In some specific embodiments of the present invention, the defoaming agent used in the above-mentioned water-based automotive interior adhesive is at least one of Digao 810 and Sangjing Chemical 2590.

[0045] In some specific embodiments of the present invention, the wetting agent used in the above-mentioned water-based automotive interior adhesive is at least one of Sangjing Chemical 440 and AFCONA3588.

[0046] In some specific embodiments of the present invention, the thickener used in the above-mentioned water-based automotive interior adhesive is at least one of Rohm and Haas alkali swelling ASE-60, Hemingway DeuRheo WT-105A, and Rohm and Haas RM-8W.

[0047] The embodiment of the present invention also provides a method for preparing a water-based automotive interior adhesive with good heat resistance, comprising:

[0048] Take various raw materials according to the above formula of automobile interior adhesive with good heat resistance;

[0049] The polyester polyol and polyether polyol in the raw materials are put into a prepolymer bottle, dehydrated at 120°C and -0.1Mpa for 20 minutes, cooled to about 80°C, added with isocyanate and reacted at normal pressure for 1 hour, then added with small molecule chain extender, hydrophilic chain extender and catalyst and reacted at 75°C for 2-4 hours until the -NCO content reaches the theoretical value and diluted with solvent, and then dispersed at high speed, and neutralizer, deionized water and amine chain extender are added under high-speed dispersion conditions, and dispersed at high speed for 30 minutes to obtain an aqueous polyurethane dispersion, and acetone in the aqueous polyurethane dispersion is removed to obtain an emulsion with a solid content of 40%, and carbonized diamine is added to the emulsion and stirred at a speed of 500r / min for 30 minutes, and a defoamer and a wetting agent are added in turn and stirred at a speed of 500r / min for 30 minutes, and finally a thickener is added in small amounts and multiple times to obtain an aqueous adhesive with a suitable viscosity, that is, an aqueous automotive interior adhesive with good heat resistance.

[0050] In summary, the water-based automotive interior adhesive provided by the embodiment of the present invention can effectively improve the heat resistance of the glue by using a polyester polyol with good heat resistance in the adhesive synthesis process. At the same time, the use of carbodiimide in compounding can further improve the temperature resistance of the product, so that the initial temperature resistance of the coated sample is good at 50°C, and the final temperature resistance effect is also good 72 hours after curing, achieving the effect of good temperature resistance and high bonding strength, and well solving the problem of poor temperature resistance of existing water-based automotive interior adhesives. The product has good environmental advantages, can be activated at a lower temperature, and has excellent bonding and heat resistance.

[0051] In order to more clearly demonstrate the technical solution and technical effects provided by the present invention, the solution provided by the embodiment of the present invention is described in detail with specific embodiments below.

[0052] Example 1

[0053] The present embodiment provides a water-based automotive interior adhesive with good heat resistance, and the preparation method thereof may include the following steps (in parts by weight):

[0054] Mix 8 parts of Gaomeng YH-3666-1, 3 parts of PBA2000 and 2 parts of PPG1000 together, dehydrate at 120℃, -0.1Mpa for 20 minutes, then cool to 80℃, add 16 parts of isophorone diisocyanate (IPDI) and react for 1 hour, then add 3 parts of dimethylolpropionic acid (DMPA), 1 part of 1.4-butanediol and 0.7 parts of neopentyl glycol, and continue to react at 75℃ for 2 hours. During the reaction, add 20 parts of acetone to reduce the viscosity, cool to 50℃, add 1 part of AAS salt, and test the NCO content at the end of the reaction. The temperature of the first intermediate was controlled at 40°C, 2.3 parts of triethylamine was added to the polyurethane for neutralization reaction, the reaction time was 20 minutes, and the second intermediate was quickly dispersed by adding 57 parts of water at a speed of 1500r / min using a high-speed disperser, 1 part of ethylenediamine was added, and finally the acetone in the system was removed to obtain a water-based polyurethane dispersion with a solid content of 40%, and 4 parts of Langyi were added. CA-01 carbodiimide was stirred at 500 r / min for 30 min, 0.3 parts of 810 defoamer and 0.3 parts of AFCONA3588 wetting agent were added, and finally 0.4 parts of Rohm and Haas 8W thickener were added in small amounts several times to prepare a water-based automotive interior adhesive with a high viscosity of 3000-4000 cP.

[0055] Example 2

[0056] The present embodiment provides a water-based automotive interior adhesive with good heat resistance, and the preparation method thereof may include the following steps (in parts by weight):

[0057] Mix 6 parts of Gaomeng YH-3666-2, 3 parts of PBA2000 and 4 parts of PPG1000 together, dehydrate at 120℃, -0.1Mpa for 20 minutes, then cool to 80℃, add 16 parts of isophorone diisocyanate (IPDI) and react for 1 hour, then add 2 parts of dihydroxymethylbutyric acid (DMBA), 2 parts of 1.4-butanediol and 1.5 parts of hexanediol, and continue to react at 75℃ for 2 hours. During the reaction, add 15 parts of acetone to reduce the viscosity, cool to 50℃, add 1 part of AAS salt, and test the NCO content at the end of the reaction. The temperature of the first intermediate was controlled at 40°C, 1.5 parts of triethylamine was added to the polyurethane for neutralization reaction, the reaction time was 20 minutes, and the second intermediate was quickly dispersed by adding 57 parts of water at a speed of 1500r / min using a high-speed disperser, 1 part of diethylenetriamine was added, and finally the acetone in the system was removed to obtain a water-based polyurethane dispersion with a solid content of 40%, and 4 parts of Langyi were added. CA-01 carbodiimide was stirred at 500 r / min for 30 min, 0.1 part of 810 defoamer and 0.1 part of AFCONA3588 wetting agent were added, and finally 0.4 part of Rohm and Haas 8W thickener and 0.4 part of alkali swelling ASE-60 were added in small amounts and multiple times to prepare a water-based automotive interior adhesive with a high viscosity of 7000-8000 cP.

[0058] Example 3

[0059] The present embodiment provides a water-based automotive interior adhesive with good heat resistance, and the preparation method thereof may include the following steps (in parts by weight):

[0060] Mix 5 parts of Gaomeng YH-3666-1 polyester, 5 parts of PBA2000 and 3 parts of PPG1000 together, dehydrate at 120℃, -0.1Mpa for 20 minutes, then cool to 80℃, add 10 parts of isophorone diisocyanate (IPDI) and 6 parts of diphenylmethane diisocyanate (MDI) to react for 1 hour, then add 2 parts of dihydroxymethylpropionic acid (DMBA), 2 parts of neopentyl glycol and 1.5 parts of 1.6 hexanediol, and continue to react at 75℃ for 2 hours. During the reaction, add 20 parts of acetone to reduce the viscosity, cool to 50℃, add 1 part of AAS salt, and test the NCO content at the end of the reaction. The temperature of the first intermediate was controlled at 40°C, 1.5 parts of triethylamine was added to neutralize the polyurethane, and the reaction time was 20 minutes. The second intermediate was quickly dispersed by adding 57 parts of water at a speed of 1500 r / min using a high-speed disperser, 1 part of ethylenediamine was added, and finally the acetone in the system was removed to obtain an emulsion with a solid content of 40%. 4 parts of Langyi were added CA-01 carbodiimide was stirred at 500 r / min for 30 min, 0.1 part of 810 defoamer and 0.1 part of AFCONA3588 wetting agent were added, and finally 0.4 part of Rohm and Haas 8W and 0.4 part of alkali swelling ASE-60 thickener were added in small amounts and multiple times to prepare a water-based automotive interior adhesive with a low viscosity of 7000-8000 cP.

[0061] Comparative Example

[0062] This comparative example provides a water-based automotive interior adhesive with good heat resistance, and its preparation method may include the following steps (by weight):

[0063] Add 4 parts of Langyi to 98 parts of competing waterborne polyurethane resin CA-01 carbodiimide was stirred at 500 r / min for 30 min, 0.1 part of 810 defoamer and 0.1 part of AFCONA3588 wetting agent were added, and finally 0.4 part of Rohm and Haas 8W thickener and 0.4 part of alkali swelling ASE-60 were added in small amounts and multiple times to prepare a water-based automotive interior adhesive with a high viscosity of 7000-8000 cPs.

[0064] A series of waterborne polyurethane automotive interior adhesives were tested for their bonding and heat resistance properties.

[0065] Table 1 is the heat resistance test of waterborne polyurethane automotive interior adhesive

[0066] Basic performance Example 1 Example 2 Example 3 Comparative Example Heat-resistant bounce distance (cm) 1.5 1.2 1.0 2.0

[0067] The bonded PVC strips are placed in an oven, and will bounce back a certain distance at high temperature. The length of the bounce back distance is recorded. It can be seen from Table 1 that the present invention uses Examples 1 to 3 to prepare water-based automotive interior adhesives. The heat-resistant bounce back distance of Examples 1 to 3 is less than that of the comparative example; the heat resistance performance of Examples 1 to 3 is also better than that of the comparative example.

[0068] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any form that the information constitutes prior art known to those skilled in the art.

Claims

1. A water-based automotive interior adhesive with good heat resistance, characterized in that: The composition comprises the following components in parts by weight: The polyester polyol is one or two of polycarbonate diol, PBA2000, Gaomeng YH-3666-1 and Gaomeng YH-3666-2.

2. The water-based automotive interior adhesive with good heat resistance according to claim 1, characterized in that: The carbodiimide is made of PCDI X3900 from Jiadida and Langyi At least one of CA-01.

3. The water-based automotive interior adhesive with good heat resistance according to claim 1 or 2, characterized in that: The polyether polyol is one or more of PEG2000, PPG1000 and PTMEG2000.

4. The water-based automotive interior adhesive with good heat resistance according to claim 1 or 2, characterized in that: The isocyanate is one of MDI and IPDI.

5. The water-based automotive interior adhesive with good heat resistance according to claim 1 or 2, characterized in that: The small molecule polyol is one or more of 1.4-butanediol, octylpentanediol, 1.6-hexanediol and trimethylolpropane.

6. The water-based automotive interior adhesive with good heat resistance according to claim 1 or 2, characterized in that: The hydrophilic chain extender is one or two of DMPA, DMBA and AAS salt.

7. The water-based automotive interior adhesive with good heat resistance according to claim 1 or 2, characterized in that: The neutralizing agent is one of sodium hydroxide, ammonia water and triethylamine.

8. The water-based automotive interior adhesive with good heat resistance according to claim 1 or 2, characterized in that: The amine chain extender is one or two of isophoronediamine, ethylenediamine, diethylenetriamine and triethylenetetramine.

9. The water-based automotive interior adhesive with good heat resistance according to claim 1 or 2, characterized in that: The defoaming agent is at least one of Digo 810 and Sangjing Chemical 2590; The wetting agent is at least one of Sangjing Chemical 440 and AFCONA3588; The thickener is at least one of Rohm and Haas alkali swelling ASE-60, Hemingway DeuRheo WT-105A, and Rohm and Haas RM-8W.

10. A method for preparing a water-based automotive interior adhesive with good heat resistance, characterized in that: include: Take the raw materials according to the formula of the automotive interior adhesive with good heat resistance according to any one of claims 1 to 9; The polyester polyol and polyether polyol in the raw materials are put into a prepolymer bottle, dehydrated at 120°C and -0.1Mpa for 20 minutes, cooled to about 80°C, added with isocyanate and reacted at normal pressure for 1 hour, then added with small molecule chain extender and hydrophilic chain extender and reacted at 75°C for 2-4 hours until the -NCO content reaches the theoretical value and diluted with solvent, then dispersed at 1200r / min, added with neutralizer, deionized water and amine chain extender under high-speed dispersion conditions, dispersed at high speed for 30 minutes to obtain an aqueous polyurethane dispersion, removed acetone from the aqueous polyurethane dispersion to obtain an emulsion with a solid content of 40%, added with carbodiimide to the emulsion and stirred at 500r / min for 30 minutes, added with defoamer and wetting agent in turn and stirred at 500r / min for 30 minutes, finally added with thickener to obtain an aqueous adhesive with suitable viscosity, i.e., an aqueous automotive interior adhesive with good heat resistance.

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