CN103396753B - Preparation method of hot-melt polyurethane resin for bonding material - Google Patents
Preparation method of hot-melt polyurethane resin for bonding material Download PDFInfo
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Abstract
The invention discloses a preparation method of hot-melt polyurethane resin for a bonding material. The preparation method comprises the following steps of performing a dehydration treatment on polyester polyol, polyether polyol, natural oligomer polyol or a mixture of two or more of the polyols aforementioned in certain conditions; adding an amine catalyst or a metal organic compound catalyst, and uniformly stirring and mixing at a room temperature; then reacting the mixture obtained from the former step with polyisocyanate or diisocyanate at 50-70 DEG C; after reacting for a certain time, adding an appropriate amount of a chain extender in the system (an appropriate amount of a good solvent can be added as needed to adjust the viscosity); after the chain extension reaction is concluded, adding a certain amount of acrylate with hydroxyl and a certain amount of an antioxidant in the system; determining the content of NCO via a titration method, when the needed theoretical value is achieved, stopping the reaction, and discharging, thereby obtaining the needed hot-melt polyurethane resin for the bonding material. The hot-melt polyurethane resin for the bonding material is applied to the field of medicine and tobacco packaging as an adhesive, and has the greatest advantages of high bonding strength, low viscosity and low readily oxidizable substance content, and is beneficial to customer use and cost reduction.
Description
Technical field
The invention belongs to sizing agent field, be specifically related to a kind of preparation method of adhesives hot melt type polyurethane resin.
Background technology
All the time, at packaging field, especially medicine and tobacco package field use adhesive for polyurethane mainly contains solvent borne polyurethane sizing agent, two-component polyurethane adhesive sticks agent and one-component solvent-free type polyurethane sizing agent.The equal Shortcomings of above three class sizing agent is unfavorable for application.Embody a concentrated reflection of viscosity bigger than normal be unfavorable for coating use; Bonding strength is not high, is embodied in grow set time to cause initial adhesive strength poor, especially not high to the bonding force of PVC board and aluminium foil; Existing solvent borne polyurethane sizing agent system needs to use a large amount of organic solvents to carry out adjusting viscosity, although reduce viscosity by the method for adding a large amount of organic solvent, glue spread does not reach requirement, and readily oxidizable substance content has the phenomenon of severe overweight.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of adhesives hot melt type polyurethane resin, it concentrates the deficiency solved existing for existing adhesive for polyurethane: as solvent borne polyurethane sizing agent system consumption of organic solvent too much causes glue spread on the low side, one-component solvent-free type polyurethane sizing agent viscosity is bigger than normal is unfavorable for gluing, and two-component polyurethane adhesive sticks the problems such as the application art complexity of agent; The present invention also solves above three types adhesive for polyurethane readily oxidizable substance content overproof simultaneously, bonding strength is on the low side, the problem that especially initial adhesive strength is on the low side.
Technical solution of the present invention is:
A preparation method for adhesives hot melt type polyurethane resin, its special character is, comprises the following steps:
1] processed is carried out to two or more mixture of polyester polyol, polyether glycol, natural oligomers polyvalent alcohol or more polyvalent alcohol, the equal relative molecular mass of number of described polyester polyol or polyether glycol is between 1000-5000, and viscosity is between 800-2000mPa.S (25 DEG C);
2] add tertiary amines or Catalyzed by Organometallic Compounds agent, stirring at room temperature mixes;
3] add polyisocyanates or vulcabond stirring at room temperature 30 minutes again, then react at being warming up to 50-70 DEG C, react after 1-1.5 hour, in system, add chainextender continue to react;
4] react after 3-5 hour, after chain extending reaction terminates, add hydroxyl acrylate and oxidation inhibitor to system again;
5] determined the content of NCO by volumetry, when reaching required theoretical value, discharging, namely obtains required adhesives hot melt type polyurethane resin.
Above-mentioned steps 3] when adding chainextender, add the good solvent of adjusting viscosity.Effect is better.
By weight, each component proportion is for the starting material of above-mentioned each reaction and auxiliary dosage:
Polyisocyanates or vulcabond: 14-32
Polyester polyol is or/and polyether glycol: 60-80
Acrylate: 4.5-5
Chainextender: 1.5-3
Good solvent 80-200
Catalyzer: 0.5-1
Oxidation inhibitor: 0.5-1.
Above-mentioned processed, that polyester polyol or polyether glycol or the mixture of the two are added in reactor, start stirring, and the heating that heats up, make liquid temperature reach about 50-70 DEG C, start vacuum pump, vacuum tightness in reactor is made to rise to 0.098-0.1MPa slowly, control temperature in the kettle be about 110 DEG C 3 hours, discharging, is placed in airtight storage tank for subsequent use.
The above-mentioned content determination level of response by titration measuring NCO, its method is described as: take 3.5 ~ 6.5g prepolymer, put into dried flask, the Di-n-Butyl Amine solution that 20mL newly prepares is added with transfer pipet, add the THF of 50mL drying again, shake up, add 100mL anhydrous isopropyl alcohol, to give instruction agent by 0.5mL tetrabromo-mcresolsulfonphthalein, be titrated to yellow with the hydrochloric acid soln of 1N and be terminal, finally do blank assay again, then the content of NCO group is calculated by NCO%=mLHCl blank-mLHCl sample/example weight x4.2, represent that when NCO content reaches theoretical value reaction terminates, discharging, obtain required adhesives hot melt type polyurethane resin, described Di-n-Butyl Amine solution is obtained to 1000mL preparation by the dilution with toluene that 338mL Di-n-Butyl Amine in volumetric flask is dry.
Above-mentioned polyisocyanates or vulcabond comprise vulcabond, triisocyanate and polyisocyanates, and described vulcabond comprises any one that TDI, MDI, HDI, TMHDI, IPDI and HXDI combine.Especially better with one or both compound use effects wherein.
Above-mentioned polyether glycol and polyester polyol comprise any one that PDA, PEA, PBA, PCL, PCDL, PTMEG, PEG and PPG combine; Described natural polyols comprises vegetable oil polyol and rosin ester polyvalent alcohol.Especially with PCL or PCL and PTMEG two kinds of best results used in combination.
Above-mentioned hydroxy acrylate comprises Hydroxyethyl acrylate, Propylene glycol monoacrylate, hydroxyethyl methylacrylate, Rocryl 410, pentaerythritol triacrylate, Dipentaerythritol Pentaacrylate and epoxy acrylate.The present invention selects epoxy acrylate or (methyl) Propylene glycol monoacrylate as function monomer end-blocking.
Above-mentioned chainextender comprises BDO, ethylene glycol, 1,2-PD, 1,3-PD, glycol ether, 1,6-hexylene glycol, MOCA, DMTDA, DETDA, thanomin, diethanolamine or trolamine;
Described good solvent comprises N-Methyl pyrrolidone (NMP), DMF (DMF) ' acetone, pimelinketone, N-BUTYL ACETATE;
Described catalyzer comprises triethylenediamine, two (dimethylaminoethyl) ether, 2-(2-Dimethylamino-ethoxy) ethanol, stannous octoate, dibutyl tin laurate, carboxylic acid potassium, organic mercury and Organic leadP.Especially using the one in stannous octoate, dibutyl tin laurate as optimal selection.
Described oxidation inhibitor comprise 2,6 ditertiary butyl p cresol, four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, butyl or octylatcd aniline and phosphite combination any one.Select one wherein or have better effect with phosphorous acid ester compound use.
The adhesives hot melt type polyurethane resin utilizing above-mentioned preparation method to prepare, it is special is: this adhesives hot melt type polyurethane resin is equipped with appropriate organic solvent and is applied to medicine and tobacco package as sizing agent.
The preparation method of a kind of adhesives hot melt type polyurethane resin of the present invention, wherein polyvalent alcohol is after processed, add organotin or tertiary amine catalyst and polyisocyanates stirring at room temperature 30 minutes, heat up again and react the regular hour between 50-70 DEG C, then add chainextender and carry out chain extending reaction, total reaction time is at 3-5 hour.
The preparation method of a kind of adhesives hot melt type polyurethane resin of the present invention, wherein, adds epoxy acrylate or (methyl) Propylene glycol monoacrylate carries out end capping, 50-70 DEG C of reaction times at 3-7 hour.
Advantage of the present invention is mainly reflected in:
Its product of the present invention is colourless transparent liquid, is equipped with a small amount of organic solvent and namely obtains low-viscosity polyurethane sizing agent, be conveniently coated with use.
The present invention its be mixed with low-viscosity polyurethane sizing agent, bonding strength, comprise initial adhesive strength all far above existing various types of adhesive for polyurethane.
The present invention its be mixed with low-viscosity polyurethane sizing agent, readily oxidizable substance content is 0 or levels off to 0 after measured.
The present invention its be mixed with adhesive for polyurethane, most outstanding feature is that viscosity is low and solid content is high, and glue spread can reach national and foreign standards.
The present invention only needs to add a small amount of organic solvent or namely good solvent obtains adhesive for polyurethane, and principal feature is that viscosity is low, readily oxidizable substance content is low, solid content is high, bonding strength is high and glue spread is high.
The present invention only needs to add a small amount of organic solvent or namely good solvent obtains adhesive for polyurethane, for the packaging of drug packages or other field provides practicable solution, is particularly useful for bonding with between aluminium foil or other section bars of PVC board.
Embodiment
For illustrating the technology of the present invention further, being described in detail below in conjunction with specific embodiment, the present invention includes but be not limited to following examples.
Embodiment 1
A kind of preparation method of adhesives hot melt type polyurethane resin, wherein, each component concentration is by mass parts: TDI:HDI:PTMEG:PEG:DBO: epoxy acrylate: organotin: oxidation inhibitor: good solvent is 10:4:60:20:1.5:4.5:0.5:0.5:100.
A kind of preparation method of adhesives hot melt type polyurethane resin, its preparation process is as follows: PTMEG and PEG is carried out processed under certain condition, add organotin catalysts, stirring at room temperature mixes, add TDI and HDI respectively again, be warming up between 50-70 DEG C, after reaction certain hour, the DBO(adding aforementioned proportion in system can add appropriate good solvent adjusting viscosity as required), above two-step reaction total time is no more than 5 hours, then adds the oxidation inhibitor insulation reaction of epoxy acrylate and specified amount.Determined the content of NCO by volumetry, when reaching required theoretical value, stopped reaction, discharging, namely obtains required urethane resin.
Wherein, when the equal relative molecular mass of number of PTMEG and PEG is 1000,25 DEG C, viscosity is at about 600mPa.S.
Wherein, PTMEG and PEG needed through processed before adding TDI and MDI, namely after PTMEG and PEG drops into reactor, heat up, when the temperature of mixture reaches 50 DEG C, start vacuum pump, make vacuum tightness in reactor rise to 0.098-0.1MPa slowly, control temperature in the kettle be about 110 DEG C 3 hours, for subsequent use.
The wherein said content determination level of response by titration measuring NCO, its method is described as: take 5g prepolymer, put into dried flask, the 20mL Di-n-Butyl Amine solution of new preparation is added with transfer pipet, add the THF of 50mL drying again, shake up, add 100mL anhydrous isopropyl alcohol, to give instruction agent by 0.5mL tetrabromo-mcresolsulfonphthalein, be titrated to yellow with the hydrochloric acid soln of 1N and be terminal, finally do blank assay again, then the content of NCO group is calculated by NCO%=mLHCl blank-mLHCl sample/example weight x4.2, represent that when NCO content reaches theoretical value reaction terminates, discharging, obtain required adhesives hot melt type polyurethane resin.
Product of the present invention only needs to add a small amount of organic solvent or namely good solvent obtains adhesive for polyurethane, principal feature is that viscosity is low, readily oxidizable substance content is low, solid content is high, bonding strength is high and glue spread is high, product viscosity of the present invention is less than 50 seconds (at present this type of product existing be generally 60-80 second), readily oxidizable substance Han Liang≤0.5(at present this type of product existing is generally about 1), solid content 25%(at present this type of product existing is generally about 20%), bonding strength 11-13N(at present this type of product existing is 8-10N), for drug packages or other need the packaging field of high-solid lower-viscosity sizing agent to provide practicable solution, be particularly useful for bonding with between aluminium foil or other section bars of PVC board.
Embodiment 2
A preparation method for adhesives hot melt type polyurethane resin, wherein, each component concentration is by mass parts: IPDI:MDI:PTMEG:PCL:DBO: epoxy acrylate: tertiary amine: oxidation inhibitor: good solvent is 12:20:30:30:3:5:0.5:0.5:80.
A kind of preparation method of adhesives hot melt type polyurethane resin, its preparation process is as follows: PTMEG and PCL is carried out processed under certain condition, add tertiary amine catalyst, stirring at room temperature mixes, add IPDI and MDI respectively again, be warming up between 50-70 DEG C, after reaction certain hour, the DBO(adding aforementioned proportion in system can add appropriate good solvent adjusting viscosity as required), above two-step reaction total time is no more than 5 hours, then adds the oxidation inhibitor insulation reaction of epoxy acrylate and specified amount.Determined the content of NCO by volumetry, when reaching required theoretical value, stopped reaction, discharging, namely obtains required adhesives hot melt type polyurethane resin.
Wherein, when the equal relative molecular mass of number of PTMEG and PEG is 1000,25 DEG C, viscosity is at about 600mPa.S.
Wherein, PTMEG and PEG needed through processed before adding TDI and MDI, namely after PTMEG and PEG drops into reactor, heat up, when the temperature of mixture reaches 50 DEG C, start vacuum pump, make vacuum tightness in reactor rise to 0.098-0.1MPa slowly, control temperature in the kettle be about 110 DEG C 3 hours, for subsequent use.
The wherein said content determination level of response by titration measuring NCO, its method is described as: take 5g prepolymer, put into dried flask, the 20mL Di-n-Butyl Amine solution of new preparation is added with transfer pipet, add the THF of 50mL drying again, shake up, add 100mL anhydrous isopropyl alcohol, to give instruction agent by 0.5mL tetrabromo-mcresolsulfonphthalein, be titrated to yellow with the hydrochloric acid soln of 1N and be terminal, finally do blank assay again, then the content of NCO group is calculated by NCO%=mLHCl blank-mLHCl sample/example weight x4.2, represent that when NCO content reaches theoretical value reaction terminates, discharging, obtain required urethane resin.
Product of the present invention only needs to add a small amount of organic solvent or namely good solvent obtains adhesive for polyurethane, principal feature is that viscosity is low, readily oxidizable substance content is low, solid content is high, bonding strength is high and glue spread is high, product viscosity of the present invention is less than 50 seconds (at present this type of product existing be generally 60-80 second), readily oxidizable substance Han Liang≤0.5(at present this type of product existing is generally about 1), solid content 25%(at present this type of product existing is generally about 20%), bonding strength 11-13N(at present this type of product existing is 8-10N), for drug packages or other need the packaging field of high-solid lower-viscosity sizing agent to provide practicable solution, be particularly useful for bonding with between aluminium foil or other section bars of PVC board.
Embodiment 3
A kind of preparation method of adhesives hot melt type polyurethane resin, wherein, each component concentration is by mass parts: IPDI:MDI:HDI:PTMEG:PCL:PPG: ethylene glycol: epoxy acrylate: organotin: Resorcinol: good solvent is 8:8:16:20:20:20:3:5:0.5:1:200.
A kind of preparation method of adhesives hot melt type polyurethane resin, its preparation process is as follows: PTMEG, PCL and PPG are carried out processed under certain condition, add organotin catalysts, stirring at room temperature mixes, add IPDI, HDI and MDI respectively again, be warming up between 50-70 DEG C, after reaction certain hour, the DBO(adding aforementioned proportion in system can add appropriate good solvent adjusting viscosity as required), above two-step reaction total time is no more than 5 hours, then adds the oxidation inhibitor insulation reaction of epoxy acrylate and specified amount.Determined the content of NCO by volumetry, when reaching required theoretical value, stopped reaction, discharging, namely obtains required urethane resin.
Wherein, when the equal relative molecular mass of number of PTMEG, PPG and PEG is 1000,25 DEG C, viscosity is at about 600mPa.S.
Wherein, vulcabond needed through processed before adding oligopolymer dibasic alcohol system, namely after oligopolymer dibasic alcohol drops into reactor, heat up, when the temperature of mixture reaches 50 DEG C, start vacuum pump, make vacuum tightness in reactor rise to 0.098-0.1MPa slowly, control temperature in the kettle be about 110 DEG C 3 hours, for subsequent use.
The wherein said content determination level of response by titration measuring NCO, its method is described as: take 5g prepolymer, put into dried flask, the 20mL Di-n-Butyl Amine solution of new preparation is added with transfer pipet, add the THF of 50mL drying again, shake up, add 100mL anhydrous isopropyl alcohol, to give instruction agent by 0.5mL tetrabromo-mcresolsulfonphthalein, be titrated to yellow with the hydrochloric acid soln of 1N and be terminal, finally do blank assay again, then the content of NCO group is calculated by NCO%=mLHCl blank-mLHCl sample/example weight x4.2, represent that when NCO content reaches theoretical value reaction terminates, discharging, obtain required adhesives hot melt type polyurethane resin.
Product of the present invention only needs to add a small amount of organic solvent or namely good solvent obtains adhesive for polyurethane, principal feature is that viscosity is low, readily oxidizable substance content is low, solid content is high, bonding strength is high and glue spread is high, product viscosity of the present invention is less than 50 seconds (at present this type of product existing be generally 60-80 second), readily oxidizable substance Han Liang≤0.5(at present this type of product existing is generally about 1), solid content 25%(at present this type of product existing is generally about 20%), bonding strength 11-13N(at present this type of product existing is 8-10N), for drug packages or other need the packaging field of high-solid lower-viscosity sizing agent to provide practicable solution, be particularly useful for bonding with between aluminium foil or other section bars of PVC board.
Embodiment 4
A kind of preparation method of adhesives hot melt type polyurethane resin, wherein, each component concentration is by mass parts: IPDI:HDI:PTMEG:PCL:PPG:DBO:(methyl) Propylene glycol monoacrylate: organotin: Resorcinol: good solvent is 7:7:16:20:40:20:1.5:4.5:0.5:1:120.
A kind of preparation method of adhesives hot melt type polyurethane resin, its preparation process is as follows: PTMEG, PCL and PPG are carried out processed under certain condition, add organotin catalysts, stirring at room temperature mixes, then adds IPDI and HDI respectively, be warming up between 50-70 DEG C, after reaction certain hour, in system, add the 1,3 butylene glycol of aforementioned proportion, above two-step reaction total time is no more than 5 hours, then adds the oxidation inhibitor insulation reaction of epoxy acrylate and specified amount.Determined the content of NCO by volumetry, when reaching required theoretical value, stopped reaction, discharging, namely obtains required adhesives hot melt type polyurethane resin.
Wherein, when the equal relative molecular mass of number of PTMEG, PPG and PEG is 1000,25 DEG C, viscosity is at about 600mPa.S.
Wherein, vulcabond needed through processed before adding oligopolymer dibasic alcohol system, namely after oligopolymer dibasic alcohol drops into reactor, heat up, when the temperature of mixture reaches 50 DEG C, start vacuum pump, make vacuum tightness in reactor rise to 0.098-0.1MPa slowly, control temperature in the kettle be about 110 DEG C 3 hours, for subsequent use.
The wherein said content determination level of response by titration measuring NCO, its method is described as: take 5g prepolymer, put into dried flask, the 20mL Di-n-Butyl Amine solution of new preparation is added with transfer pipet, add the THF of 50mL drying again, shake up, add 100mL anhydrous isopropyl alcohol, to give instruction agent by 0.5mL tetrabromo-mcresolsulfonphthalein, be titrated to yellow with the hydrochloric acid soln of 1N and be terminal, finally do blank assay again, then the content of NCO group is calculated by NCO%=mLHCl blank-mLHCl sample/example weight x4.2, represent that when NCO content reaches theoretical value reaction terminates, discharging, obtain required urethane resin.
Product of the present invention only needs to add a small amount of organic solvent or namely good solvent obtains adhesive for polyurethane, principal feature is that viscosity is low, readily oxidizable substance content is low, solid content is high, bonding strength is high and glue spread is high, product viscosity of the present invention is less than 50 seconds (at present this type of product existing be generally 60-80 second), readily oxidizable substance Han Liang≤0.5(at present this type of product existing is generally about 1), solid content 25%(at present this type of product existing is generally about 20%), bonding strength 11-13N(at present this type of product existing is 8-10N), for drug packages or other need the packaging field of high-solid lower-viscosity sizing agent to provide practicable solution, be particularly useful for bonding with between aluminium foil or other section bars of PVC board.
Embodiment 5
A kind of preparation method of adhesives hot melt type polyurethane resin, wherein, each component concentration is by mass parts: IPDI:HDI:PTMEG:PCL:PPG:1,3-butyleneglycol: bisphenol A epoxy acrylate: organotin: Resorcinol: good solvent is 7:7:16:20:40:20:1.5:4.5:0.5:1:80.
A kind of preparation method of adhesives hot melt type polyurethane resin, its preparation process is as follows: PTMEG, PCL and PPG are carried out processed under certain condition, add organotin catalysts, stirring at room temperature mixes, then adds IPDI and HDI respectively, be warming up between 50-70 DEG C, after reaction certain hour, in system, add the 1,3 butylene glycol of aforementioned proportion, above two-step reaction total time is no more than 5 hours, then adds the oxidation inhibitor insulation reaction of epoxy acrylate and specified amount.Determined the content of NCO by volumetry, when reaching required theoretical value, stopped reaction, discharging, namely obtains required adhesives hot melt type polyurethane resin.
Wherein, when the equal relative molecular mass of number of PTMEG, PPG and PEG is 1000,25 DEG C, viscosity is at about 600mPa.S.
Wherein, vulcabond needed through processed before adding oligopolymer dibasic alcohol system, namely after oligopolymer dibasic alcohol drops into reactor, heat up, when the temperature of mixture reaches 50 DEG C, start vacuum pump, make vacuum tightness in reactor rise to 0.098-0.1MPa slowly, control temperature in the kettle be about 110 DEG C 3 hours, for subsequent use.
The wherein said content determination level of response by titration measuring NCO, its method is described as: take 5g prepolymer, put into dried flask, the 20mL Di-n-Butyl Amine solution of new preparation is added with transfer pipet, add the THF of 50mL drying again, shake up, add 100mL anhydrous isopropyl alcohol, to give instruction agent by 0.5mL tetrabromo-mcresolsulfonphthalein, be titrated to yellow with the hydrochloric acid soln of 1N and be terminal, finally do blank assay again, then the content of NCO group is calculated by NCO%=mLHCl blank-mLHCl sample/example weight x4.2, represent that when NCO content reaches theoretical value reaction terminates, discharging, obtain required urethane resin.
Product of the present invention only needs to add a small amount of organic solvent or namely good solvent obtains adhesive for polyurethane, principal feature is that viscosity is low, readily oxidizable substance content is low, solid content is high, bonding strength is high and glue spread is high, product viscosity of the present invention is less than 50 seconds (at present this type of product existing be generally 60-80 second), readily oxidizable substance Han Liang≤0.5(at present this type of product existing is generally about 1), solid content 25%(at present this type of product existing is generally about 20%), bonding strength 11-13N(at present this type of product existing is 8-10N), for drug packages or other need the packaging field of high-solid lower-viscosity sizing agent to provide practicable solution, be particularly useful for bonding with between aluminium foil or other section bars of PVC board.
Claims (7)
1. an adhesives preparation method for hot melt type polyurethane resin, is characterized in that, comprise the following steps:
1] carry out processed to polyester polyol or polyether glycol or both mixtures, the equal relative molecular mass of number of described polyester polyol or polyether glycol is between 1000-5000, and viscosity is between 800-2000mPa.S (25 DEG C);
2] add tertiary amines or Catalyzed by Organometallic Compounds agent, stirring at room temperature mixes;
3] add polyisocyanates or vulcabond stirring at room temperature 30 minutes again, then react at being warming up to 50-70 DEG C, react after 1-1.5 hour, in system, add chainextender continue to react;
4] react after 3-5 hour, after chain extending reaction terminates, add hydroxyl acrylate and oxidation inhibitor to system again;
5] determined the content of NCO by volumetry, when reaching required theoretical value, discharging, namely obtains required adhesives hot melt type polyurethane resin;
Described step 3] when adding chainextender, also add the good solvent of adjusting viscosity;
By weight, each component proportion is for the starting material of described each reaction and auxiliary dosage:
Polyisocyanates or vulcabond: 14-32
Polyester polyol is or/and polyether glycol: 60-80
Hydroxyl acrylate: 4.5-5
Chainextender: 1.5-3
Good solvent 80-200
Catalyzer: 0.5-1
Oxidation inhibitor: 0.5-1;
Described chainextender comprises any one that BDO, ethylene glycol, 1,2-PD, 1,3-PD, glycol ether, 1,6-hexylene glycol, MOCA, DMTDA, DETDA, thanomin, diethanolamine or trolamine combine;
Described good solvent comprises any one that N-Methyl pyrrolidone (NMP), DMF (DMF), acetone, pimelinketone and N-BUTYL ACETATE combine;
Described catalyzer comprises triethylenediamine, two (dimethylaminoethyl) ether, 2-(2-Dimethylamino-ethoxy) ethanol, stannous octoate, dibutyl tin laurate, carboxylic acid potassium, organic mercury and Organic leadP combination any one;
Described oxidation inhibitor comprise 2,6 ditertiary butyl p cresol, four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, butyl or octylatcd aniline and phosphite combination any one.
2. the adhesives preparation method of hot melt type polyurethane resin according to claim 1, it is characterized in that: described processed, be that polyester polyol or polyether glycol or the mixture of the two are added in reactor, start stirring, and the heating that heats up, make liquid temperature reach 50-70 DEG C, start vacuum pump, make vacuum tightness in reactor rise to 0.098-0.1MPa slowly, controlling temperature in the kettle is 110 DEG C, keep 3 hours, discharging, is placed in airtight storage tank for subsequent use.
3. the adhesives preparation method of hot melt type polyurethane resin as claimed in claim 2, it is characterized in that: the described content determination level of response by titration measuring NCO, its method is described as: take 3.5 ~ 6.5g prepolymer, put into dried flask, the Di-n-Butyl Amine solution that 20mL newly prepares is added with transfer pipet, add the THF of 50mL drying again, shake up, add 100mL anhydrous isopropyl alcohol, to give instruction agent by 0.5mL tetrabromo-mcresolsulfonphthalein, be titrated to yellow with the hydrochloric acid soln of 1N and be terminal, finally do blank assay again, then by NCO%=(mLHCl blank-mLHCl sample)/example weight x4.2 calculates the content of NCO group, represent that when NCO content reaches theoretical value reaction terminates, discharging, obtain required adhesives hot melt type polyurethane resin, described Di-n-Butyl Amine solution is obtained to 1000mL preparation by the dilution with toluene that 338mL Di-n-Butyl Amine in volumetric flask is dry.
4. the adhesives preparation method of hot melt type polyurethane resin according to claim 3, is characterized in that: described vulcabond comprises any one of TDI, MDI, HDI, TMHDI, IPDI and HXDI combination.
5. the adhesives preparation method of hot melt type polyurethane resin according to claim 4, is characterized in that:
Described polyether glycol and polyester polyol comprise any one that PDA, PEA, PBA, PCL, PCDL, PTMEG, PEG and PPG combine.
6. the adhesives preparation method of hot melt type polyurethane resin according to claim 5, is characterized in that: described hydroxyl acrylate comprises any one of Hydroxyethyl acrylate, Propylene glycol monoacrylate, hydroxyethyl methylacrylate, Rocryl 410, pentaerythritol triacrylate, Dipentaerythritol Pentaacrylate and epoxy acrylate combination.
7. the adhesives hot melt type polyurethane resin utilizing claim 1 preparation method to prepare, is characterized in that: this adhesives hot melt type polyurethane resin is equipped with appropriate organic solvent and is applied to medicine and tobacco package as sizing agent.
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| CN103770261B (en) * | 2014-01-24 | 2016-08-31 | 致恒(天津)实业有限公司 | A kind of polyurethane and the bonding process of metal |
| CN104356631A (en) * | 2014-11-06 | 2015-02-18 | 苏州佰格斯电子科技有限公司 | Durable polyurethane sealant |
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| CN103173185A (en) * | 2013-04-07 | 2013-06-26 | 江苏华信塑业发展有限公司 | Preparation method of waterborne polyurethane adhesive for card matrix material |
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