CN104212402A - Polyurethane bonder as well as preparation method and application thereof - Google Patents
Polyurethane bonder as well as preparation method and application thereof Download PDFInfo
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Abstract
The invention discloses a preparation method of a polyurethane bonder. The preparation method comprises the following steps: mixing polyester polyol, an organic solvent and p-phenylenediamine to obtain a mixture M1; adding diisocyanate into the mixture M1 to obtain a mixture M2; adding a curing agent, a chain extender and an organic silicon coupling agent into the mixture M2, and mixing to obtain the polyurethane bonder. The polyurethane bonder comprises the following components in percentage by weight: 55%-85% of polyester polyol, 2%-15% of diisocyanate, 0.5%-5% of p-phenylenediamine, 5%-30% of the organic solvent, 0.5%-5% of the curing agent, 0.1%-2% of the organic silicon coupling agent and 0.1%-2% of the chain extender. The invention further provides the polyurethane bonder and application thereof. The prepared polyurethane bonder is high-temperature-resistant and relatively high in bonding power when being used for bonding color steel plates.
Description
Technical field
The present invention relates to the preparations and applicatio field of binding agent, particularly, relate to a kind of polyurethane adhesive and its preparation method and application.
Background technology
Polyurethane adhesive is as a kind of conventional binding agent, apply very extensive in daily life and production, but polyurethane adhesive in actual use, fusing or hydrolysis is often easy to when comparatively high temps, and then reduce its cohesive force, quality product is caused to reduce, especially when boning color steel, because color steel itself uses as roof mostly, not only be easy to be heated, and color steel heat absorptivity is stronger, very easily make its heating, thus the polyurethane adhesive cohesive force having bonding color steel is significantly reduced, when cohesive force is too low, very easily in causing color steel to come off, give to produce and live and bring certain loss.
Therefore, provide a kind of can be high temperature resistant, and stronger polyurethane adhesive of cohesive force and preparation method thereof is the problem that the present invention needs solution badly.
Summary of the invention
For above-mentioned prior art, the object of the invention is to overcome the problem that significantly reduces of cohesive force under the high temperature conditions of polyurethane adhesive in prior art, thus provide a kind of can be high temperature resistant, and stronger polyurethane adhesive of cohesive force and preparation method thereof.
To achieve these goals, the invention provides a kind of preparation method of polyurethane adhesive, wherein, described preparation method comprises:
(1) polyester polyol, organic solvent and Ursol D are mixed, obtain mixture M 1;
(2) vulcabond is added in mixture M 1, obtain mixture M 2;
(3) in mixture M 2, add solidifying agent, chainextender and organo-silicon coupling agent to mix, obtain polyurethane adhesive; Wherein,
With the gross weight of described polyurethane adhesive for benchmark, the consumption of described polyester polyol is 55-85 % by weight, the consumption of described vulcabond is 2-15 % by weight, the consumption of described Ursol D is 0.5-5 % by weight, the consumption of described organic solvent is 5-30 % by weight, the consumption of described solidifying agent is 0.5-5 % by weight, and the consumption of described organo-silicon coupling agent is 0.1-2 % by weight, and the consumption of described chainextender is 0.1-2 % by weight.
Present invention also offers a kind of polyurethane adhesive obtained according to above-mentioned preparation method.
Present invention also offers the application of a kind of above-mentioned polyurethane adhesive in bonding color steel.
The present invention is by after mixing a certain proportion of polyester polyol, organic solvent, Ursol D, vulcabond, ethylene glycol and hexanodioic acid, a certain amount of solidifying agent, chainextender and organo-silicon coupling agent is being added in mixture, obtained polyurethane adhesive, this obtained polyurethane adhesive has resistance to elevated temperatures simultaneously, use under the high temperature conditions and still there is good cohesive force, thus the polyurethane adhesive making this obtained at high temperature can still have good adhesive property, be unlikely to cause the appearance of the situation such as to come off of adhesive.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Embodiment
Below the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
The invention provides a kind of preparation method of polyurethane adhesive, wherein, described preparation method comprises:
(1) polyester polyol, organic solvent and Ursol D are mixed, obtain mixture M 1;
(2) vulcabond is added in mixture M 1, obtain mixture M 2;
(3) in mixture M 2, add solidifying agent, chainextender and organo-silicon coupling agent to mix, obtain polyurethane adhesive; Wherein,
With the gross weight of described polyurethane adhesive for benchmark, the consumption of described polyester polyol is 55-85 % by weight, the consumption of described vulcabond is 2-15 % by weight, the consumption of described Ursol D is 0.5-5 % by weight, the consumption of described organic solvent is 5-30 % by weight, the consumption of described solidifying agent is 0.5-5 % by weight, and the consumption of described organo-silicon coupling agent is 0.1-2 % by weight, and the consumption of described chainextender is 0.1-2 % by weight.
Above-mentioned preparation method is by after mixing a certain proportion of polyester polyol, organic solvent, Ursol D and vulcabond, a certain amount of solidifying agent, chainextender and organo-silicon coupling agent is being added in mixture, obtained polyurethane adhesive, this obtained polyurethane adhesive has resistance to elevated temperatures simultaneously, use under the high temperature conditions and still there is good cohesive force, thus the polyurethane adhesive making this obtained at high temperature can still have good adhesive property, be unlikely to cause the appearance of the situation such as to come off of adhesive.
In order to make the polyurethane adhesive obtained, at high temperature there is better adhesive property, there is situations such as easily coming off in the object being unlikely to cause it to bond, one of the present invention preferred embodiment in, with the gross weight of described polyurethane adhesive for benchmark, the consumption of described polyester polyol is 65-75 % by weight, the consumption of described vulcabond is 5-10 % by weight, the consumption of described Ursol D is 1-3 % by weight, the consumption of described organic solvent is 10-20 % by weight, the consumption of described solidifying agent is 1-2 % by weight, the consumption of described organo-silicon coupling agent is 0.5-1 % by weight, the consumption of described chainextender is 0.5-1 % by weight.
This preparation process can be carried out under normal conditions, certainly, can be there are other with the material participating in reacting to avoid the material in air as far as possible to react, produce other impurity, cause the polyurethane adhesive deleterious obtained, one of the present invention more preferred embodiment in, step (1) and step (2) can be selected to mix in a nitrogen environment.Certainly, also react under the environment that other comparatively stable gas can be selected to exist, such as, under the environment that can exist for rare gas element, certainly, consider the factors such as production cost, and nitrogen content is higher in atmosphere, be convenient to extract, use cost is lower, therefore, react in the present invention or under the environment that exists at nitrogen of prioritizing selection.
The polyester polyol used in the present invention can be the polyester polyol type of this area routine, certainly, in order to obtain better high-temperature resistant result, such as, one of the present invention preferred embodiment in, described polyester polyol can be obtained by ethylene glycol and hexanodioic acid condensation, certainly, can react better to make the polyester polyol obtained, and reduce the generation of other products as far as possible, one of the present invention more preferred embodiment in, with the gross weight of described polyester polyol for benchmark, the consumption of described ethylene glycol is 20-40 % by weight, the consumption of described hexanodioic acid is 60-80 % by weight.
Described vulcabond can be the vulcabond type that this area routine uses, can be such as tolylene diisocyanate, alicyclic diisocyanate etc., in order to make the polyurethane adhesive obtained, there is better resistance to elevated temperatures and stronger adhesive property, one of the present invention preferred embodiment in, such as, described vulcabond specifically can be chosen as Toluene-2,4-diisocyanate, 4-vulcabond and/or 1,5-naphthalene diisocyanate.
Described organic solvent can be the type of organic solvent that this area routine uses, it can be such as the conventional type of organic solvent used such as toluene, vinylbenzene and trieline, in order to make can to mix better between each reactant, described organic solvent can prioritizing selection be employing acetone and/or pimelinketone.
Described solidifying agent can be the solidifying agent type that this area routine uses, such as, can diethylenetriamine, m-xylene diamine etc., more easily solidify to make the polyurethane adhesive obtained, save actual operating time, one of the present invention more preferred embodiment in, described solidifying agent can be trolamine.
Described chainextender can be the chainextender type used for this area routine, the conventional chainextender used all can use in the present invention, therefore not to repeat here, but in order to obtain better bond effect, such as, one of the present invention preferred embodiment in, described chainextender can be specially propylene glycol and/or Isosorbide-5-Nitrae-cyclohexanediol.
Present invention also offers a kind of polyurethane adhesive obtained according to above-mentioned preparation method.
Present invention also offers the application of a kind of above-mentioned polyurethane adhesive in bonding color steel.
Below will be described the present invention by embodiment.In following examples, described ethylene glycol, hexanodioic acid, acetone, pimelinketone, Ursol D, Toluene-2,4-diisocyanate, 4-vulcabond, 1,5-naphthalene diisocyanate trolamine, propylene glycol and 1,4-cyclohexanediol is conventional commercial product, and described organo-silicon coupling agent is the trade mark that Shi Feng bio tech ltd, Shanghai produces is the conventional commercial silane coupling agent of KH570.
Embodiment 1
In a nitrogen environment, 65g polyester polyol (described polyester polyol is obtained by 13g ethylene glycol and the condensation of 52g hexanodioic acid), 18g acetone and 3g Ursol D are mixed, obtains mixture M 1; In a nitrogen environment, by 10g Toluene-2,4-diisocyanate, 4-vulcabond adds in mixture M 1, obtains mixture M 2; In mixture M 2, add 2g trolamine, 1g propylene glycol and 1g organo-silicon coupling agent mix, obtain polyurethane adhesive A1.
Embodiment 2
In a nitrogen environment, 75g polyester polyol (described polyester polyol is obtained by 30g ethylene glycol and the condensation of 45g hexanodioic acid), 13g pimelinketone and 2g Ursol D are mixed, obtains mixture M 1; In a nitrogen environment, 8g1,5-naphthalene diisocyanate is added in mixture M 1, obtain mixture M 2; In mixture M 2, add 1g trolamine, 0.5g1,4-cyclohexanediol and 0.5g organo-silicon coupling agent mix, obtain polyurethane adhesive A2.
Embodiment 3
In a nitrogen environment, 72g polyester polyol (described polyester polyol is obtained by 21.6g ethylene glycol and the condensation of 50.4g hexanodioic acid), 10g acetone, 7.5g pimelinketone and 1.5g Ursol D are mixed, obtains mixture M 1; In a nitrogen environment, by 3g Toluene-2,4-diisocyanate, 4-vulcabond and 3g1,5-naphthalene diisocyanate add in mixture M 1, obtain mixture M 2; In mixture M 2, add 1.5g trolamine, 0.35g propylene glycol, 0.4g1,4-cyclohexanediol and 0.75g organo-silicon coupling agent mix, obtain polyurethane adhesive A3.
Embodiment 4
55g polyester polyol (described polyester polyol is obtained by 11g ethylene glycol and the condensation of 44g hexanodioic acid), 25.8g acetone and 4g Ursol D are mixed, obtains mixture M 1; In a nitrogen environment, by 14.5g Toluene-2,4-diisocyanate, 4-vulcabond adds in mixture M 1, obtains mixture M 2; In mixture M 2, add 0.5g trolamine, 0.1g propylene glycol and 0.1g organo-silicon coupling agent mix, obtain polyurethane adhesive A4.
Embodiment 5
85g polyester polyol (described polyester polyol is obtained by 34g ethylene glycol and the condensation of 51g hexanodioic acid), 4g pimelinketone and 0.5g Ursol D are mixed, obtains mixture M 1; In a nitrogen environment, 2g1,5-naphthalene diisocyanate is added in mixture M 1, obtain mixture M 2; In mixture M 2, add 4.5g trolamine, 2g1,4-cyclohexanediol and 2g organo-silicon coupling agent mix, obtain polyurethane adhesive A5.
Comparative example 1
In a nitrogen environment, 18g polyester polyol (described polyester polyol is obtained by 3.6g ethylene glycol and the condensation of 14.4g hexanodioic acid), 40g acetone and 10g Ursol D are mixed, obtains mixture M 1; In a nitrogen environment, by 18g Toluene-2,4-diisocyanate, 4-vulcabond adds in mixture M 1, obtains mixture M 2; In mixture M 2, add 8g trolamine, 3g propylene glycol and 3g organo-silicon coupling agent mix, obtain polyurethane adhesive D1.
Comparative example 2
In a nitrogen environment, 95g polyester polyol (described polyester polyol is obtained by 38g ethylene glycol and the condensation of 57g hexanodioic acid), 3.1g pimelinketone and 0.4g Ursol D are mixed, obtains mixture M 1; In a nitrogen environment, 1g1,5-naphthalene diisocyanate is added in mixture M 1, obtain mixture M 2; In mixture M 2, add 0.4g trolamine, 0.05g1,4-cyclohexanediol and 0.05g organo-silicon coupling agent mix, obtain polyurethane adhesive D2.
Comparative example 3
Commercially available conventional polyurethanes binding agent D3.
Test case
Above-mentioned obtained A1-A5 and D1-D3 be bonding to respectively the color steel of two panels watt and measure its stripping strength K1, place under above-mentioned color steel watt being placed in the environment of 40 DEG C simultaneously and measure stripping strength K2 afterwards in 28 days, the result obtained is as shown in table 1.
Table 1
| Numbering | Stripping strength K1 (N/m) | Stripping strength K2 (N/m) |
| A1 | 1250 | 1150 |
| A2 | 1340 | 1230 |
| A3 | 1280 | 1210 |
| A4 | 1070 | 850 |
| A5 | 1050 | 870 |
| D1 | 530 | 210 |
| D2 | 260 | 120 |
| D3 | 1050 | 540 |
Can be found out by table 1, conventional commercial product are slightly better than by the stripping strength of polyurethane adhesive obtained in the scope of the invention after just boning, then performance is obviously poor for the polyurethane adhesive obtained outward in the scope of the invention, after polyurethane adhesive obtained within the scope of the present invention places 28 days in high temperature environments, stripping strength is without obvious decline, especially then stripping strength is still better for obtained in preferable range of the present invention polyurethane adhesive, but then performance is obviously very poor for the polyurethane adhesive obtained outward in the scope of the invention, conventional commercial product are placed rear stripping strength in high temperature environments and have also been occurred very significantly declining.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible array mode.
In addition, also can carry out arbitrary combination between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. a preparation method for polyurethane adhesive, is characterized in that, described preparation method comprises:
(1) polyester polyol, organic solvent and Ursol D are mixed, obtain mixture M 1;
(2) vulcabond is added in mixture M 1, obtain mixture M 2;
(3) in mixture M 2, add solidifying agent, chainextender and organo-silicon coupling agent to mix, obtain polyurethane adhesive; Wherein,
With the gross weight of described polyurethane adhesive for benchmark, the consumption of described polyester polyol is 55-85 % by weight, the consumption of described vulcabond is 2-15 % by weight, the consumption of described Ursol D is 0.5-5 % by weight, the consumption of described organic solvent is 5-30 % by weight, the consumption of described solidifying agent is 0.5-5 % by weight, and the consumption of described organo-silicon coupling agent is 0.1-2 % by weight, and the consumption of described chainextender is 0.1-2 % by weight.
2. preparation method according to claim 1, wherein, with the gross weight of described polyurethane adhesive for benchmark, the consumption of described polyester polyol is 65-75 % by weight, and the consumption of described vulcabond is 5-10 % by weight, and the consumption of described Ursol D is 1-3 % by weight, the consumption of described organic solvent is 10-20 % by weight, the consumption of described solidifying agent is 1-2 % by weight, and the consumption of described organo-silicon coupling agent is 0.5-1 % by weight, and the consumption of described chainextender is 0.5-1 % by weight.
3. preparation method according to claim 1 and 2, wherein, step (1) and step (2) are for mix in a nitrogen environment.
4. preparation method according to claim 1 and 2, wherein, described polyester polyol is obtained, with the gross weight of described polyester polyol for benchmark by ethylene glycol and hexanodioic acid condensation, the consumption of described ethylene glycol is 20-40 % by weight, and the consumption of described hexanodioic acid is 60-80 % by weight.
5. preparation method according to claim 1 and 2, wherein, described vulcabond is Toluene-2,4-diisocyanate, 4-vulcabond and/or 1,5-naphthalene diisocyanate.
6. preparation method according to claim 1 and 2, wherein, described organic solvent is acetone and/or pimelinketone.
7. preparation method according to claim 1 and 2, wherein, described solidifying agent is trolamine.
8. preparation method according to claim 1 and 2, wherein, described chainextender is propylene glycol and/or Isosorbide-5-Nitrae-cyclohexanediol.
9. the polyurethane adhesive obtained according to the preparation method in claim 1-8 described in any one.
10. the application of polyurethane adhesive according to claim 9 in bonding color steel.
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| CN106391992A (en) * | 2016-10-12 | 2017-02-15 | 山东科技大学 | Polyester polyol and phenolic resin compound cold box core making adhesive system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104974701A (en) * | 2015-07-21 | 2015-10-14 | 浙江川洋海绵有限公司 | Glue for sponge joint abutting and preparation method thereof |
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| CN108997946A (en) * | 2018-06-27 | 2018-12-14 | 苏州市回天科技有限公司 | A kind of sound insulation tacky film resistant to high temperature and preparation method thereof |
| CN110172264A (en) * | 2019-05-25 | 2019-08-27 | 北京点域科技有限公司 | A kind of preparation method of high temperature resistant type oil paint |
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