CN107987778A - A kind of household electrical appliances reaction type polyurethane hot-melt adhesive and preparation method thereof - Google Patents

A kind of household electrical appliances reaction type polyurethane hot-melt adhesive and preparation method thereof Download PDF

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Publication number
CN107987778A
CN107987778A CN201711291103.8A CN201711291103A CN107987778A CN 107987778 A CN107987778 A CN 107987778A CN 201711291103 A CN201711291103 A CN 201711291103A CN 107987778 A CN107987778 A CN 107987778A
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weight
parts
melt adhesive
type polyurethane
reaction type
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CN201711291103.8A
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CN107987778B (en
Inventor
朱成伟
陶小乐
何永富
陈晨
张国锋
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Hangzhou Zhijiang Silicone Chemicals Co Ltd
Hangzhou Zhijiang New Material Co Ltd
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Hangzhou Zhijiang Silicone Chemicals Co Ltd
Hangzhou Zhijiang New Material Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04Polyurethanes
    • C09J175/06Polyurethanes from polyesters
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40High-molecular-weight compounds
    • C08G18/42Polycondensates having carboxylic or carbonic ester groups in the main chain
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40High-molecular-weight compounds
    • C08G18/42Polycondensates having carboxylic or carbonic ester groups in the main chain
    • C08G18/4202Two or more polyesters of different physical or chemical nature
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40High-molecular-weight compounds
    • C08G18/48Polyethers
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40High-molecular-weight compounds
    • C08G18/62Polymers of compounds having carbon-to-carbon double bonds
    • C08G18/6216Polymers of alpha-beta ethylenically unsaturated carboxylic acids or of derivatives thereof
    • C08G18/625Polymers of alpha-beta ethylenically unsaturated carboxylic acids; hydrolyzed polymers of esters of these acids
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72Polyisocyanates or polyisothiocyanates
    • C08G18/74Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7657Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
    • C08G18/7664Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
    • C08G18/7671Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group

Abstract

The present invention provides a kind of household electrical appliances reaction type polyurethane hot-melt adhesive and preparation method thereof, the household electrical appliances are prepared with reaction type polyurethane hot-melt adhesive by the raw material including following components:The parts by weight of 100 parts by weight of polyester polyol~250;The parts by weight of 1 parts by weight of polyether polyol~150;The parts by weight of 50 parts by weight of isocyanates~100;The parts by weight of 70 parts by weight of tackifying resin~150;The parts by weight of 1 parts by weight of latent curing agent~10;The parts by weight of 1 parts by weight of antioxidant~5;The parts by weight of 5 parts by weight of coupling agent~10;The parts by weight of 0.01 parts by weight of catalyst~0.1;The polyester polyol is 1 by mass ratio:The crystalline polyester polyols and amorphous polyester polyalcohol of (0.25~1.5);The latent curing agent is aldimine latent curing agent or polybenzobisoxazole alkane latent curing agent.Compared with prior art, household electrical appliances provided by the invention use certain content component with reaction type polyurethane hot-melt adhesive, realize preferable interaction, obtained product solidification process bubble-free, and have excellent adhesive property, and water-fast, chemical resistance.

Description

A kind of household electrical appliances reaction type polyurethane hot-melt adhesive and preparation method thereof
Technical field
The present invention relates to polyurethane sealant technical field, is to be related to a kind of poly- ammonia of household electrical appliances response type more specifically Ester hot melt adhesive and preparation method thereof.
Background technology
Reaction type polyurethane hot-melt adhesive (abbreviation PUR):It is pre- containing end NCO polyurethane in moisture-curable polyurethane hot melt adhesive component Aggressiveness, produces under the condition of high temperature, moisture or active hydrogen thing in active functional group and air or on adherend after heating Qualitative response and form part cross-linked structure, make the performance such as adhesive strength, chemicals-resistant, heat-resisting, hydrolysis better than general heat Melten gel.Reaction type polyurethane hot-melt adhesive is widely used in the industries such as carpenter, weaving, automobile, electronics, household electrical appliances.Reaction type polyurethane heat The synthesis of melten gel is one and chemically reacts the process being combined with physical mixed.Reaction type polyurethane hot-melt adhesive in the prior art The chemical reaction of synthesis generally refers to the reaction of isocyanates and multicomponent alcoholics compound, and wherein isocyanates uses hexichol Dicyclohexylmethane diisocyanate (abbreviation MDI), and multicomponent alcoholics compound be number average molecular 1000~5000 polyester and Polyethers.
At present, many household electrical appliances, for example be to select pressure sensitive adhesive tape mostly when the fixation of cover plate for washing machine, panel of refrigerator, and Pressure sensitive adhesive tape generally requires manually to turn to match somebody with somebody, and the slower and comprehensive cost of efficiency is higher;In addition industrial pressure sensitive adhesive tape is due to just viscous Power is final bonding force, and pressure (the pressure destruction reality of 96kg or so can only be born in terms of terms of mechanics especially pressure-bearing Test), while the result in alcohol, detergent immersion experiment is nor highly desirable.From 2015, Haier, U.S. water chestnut, Hisense etc. Domestic household electrical appliances industry mark post enterprise, has begun to replace traditional industrial pressure sensitive adhesive tape using reaction type polyurethane hot-melt adhesive, and And there is actual use on the colorful glittering glass panel of some refrigerators.
But reaction type polyurethane hot-melt adhesive of the prior art can produce bubble in the curing process, cause glue-line table Face is uneven, and adhesive property is poor, does not possess water-fast, chemical resistance.
The content of the invention
In view of this, it is an object of the invention to provide a kind of household electrical appliances reaction type polyurethane hot-melt adhesive and its preparation side Method, reaction type polyurethane hot-melt adhesive solidification process bubble-free provided by the invention, and there is excellent adhesive property, and it is resistance to Water, chemical resistance.
The present invention provides a kind of household electrical appliances reaction type polyurethane hot-melt adhesive, by the raw material preparation including following components Into:
The parts by weight of 100 parts by weight of polyester polyol~250;
The parts by weight of 1 parts by weight of polyether polyol~150;
The parts by weight of 50 parts by weight of isocyanates~100;
The parts by weight of 70 parts by weight of tackifying resin~150;
The parts by weight of 1 parts by weight of latent curing agent~10;
The parts by weight of 1 parts by weight of antioxidant~5;
The parts by weight of 5 parts by weight of coupling agent~10;
The parts by weight of 0.01 parts by weight of catalyst~0.1;
The polyester polyol is 1 by mass ratio:The crystalline polyester polyols and amorphous polyester of (0.25~1.5) are more First alcohol;
The latent curing agent is aldimine latent curing agent or polybenzobisoxazole alkane latent curing agent.
Preferably, the crystalline polyester polyols be selected from succinic acid-butanediol ester glycol, tetramethylene adipate glycol, One or more in ethanedioic acid glycol ester glycol and adipic acid hexylene glycol esterdiol.
Preferably, the amorphous polyester polyalcohol is selected from ethylene glycol/butanediol/diethylene glycol (DEG)/adipat copolymers, two sweet Alcohol/phthalic anhydride copolymer, neopentyl glycol/phthalic anhydride copolymer, ethylene glycol/neopentyl glycol/succinic acid/isophthalic acid copolymers and two One or more in glycol/trimethylolpropane/adipat copolymers.
Preferably, the tackifying resin is selected from acrylic resin, hydroxyl terminated polyurethane, Petropols, polyolefins and increases One or more in viscosity resin and terpene resin.
Preferably, the antioxidant is selected from 2,6-di-tert-butyl p-methylphenol, four [β-(3,5- di-t-butyl -4- hydroxyls Phenyl) propionic acid] pentaerythritol ester, the β-positive octadecanol ester of (3,5- di-tert-butyl-hydroxy phenyls) propionic acid, three (bis- uncles of 2.4- Butyl phenyl) one or more in phosphite ester and double (3,5- di-tert-butyl-hydroxy phenyls) thioethers.
Preferably, the coupling agent be selected from γ-mercaptopropyl trimethoxysilane, gamma-aminopropyl-triethoxy-silane, γ- Glycidyl ether oxygen propyl trimethoxy silicane, vinyltrimethoxysilane, γ-isocyanate group propyl-triethoxysilicane With the one or more in N- β-(aminoethyl)-γ-aminopropyltrimethoxysilane.
Preferably, the catalyst is selected from dibutyl tin laurate, organo-bismuth, triethylenediamine and dimorpholine base two One or more in ethylether.
Present invention also offers a kind of preparation side of the household electrical appliances reaction type polyurethane hot-melt adhesive described in above-mentioned technical proposal Method, comprises the following steps:
After crystalline polyester polyols, polyether polyol, amorphous polyester polyalcohol, antioxidant and tackifying resin are mixed Dehydration, adds isocyanates and is reacted, and is eventually adding latent curing agent, coupling agent and catalyst and carries out vacuum defoamation, disperses Reaction type polyurethane hot-melt adhesive is obtained after uniformly.
Preferably, the temperature of the dehydration be 105 DEG C~130 DEG C, vacuum≤- 0.095MPa, the time for 1.5h~ 2.5h。
Preferably, the temperature of the reaction is 93 DEG C~98 DEG C, and the time is 1h~3h.
The present invention provides a kind of household electrical appliances reaction type polyurethane hot-melt adhesive and preparation method thereof, the household electrical appliances response type Polyurethane hot melt is prepared by the raw material including following components:The parts by weight of 100 parts by weight of polyester polyol~250;Polyethers The parts by weight of 1 parts by weight of polyalcohol~150;The parts by weight of 50 parts by weight of isocyanates~100;The weight of 70 parts by weight of tackifying resin~150 Measure part;The parts by weight of 1 parts by weight of latent curing agent~10;The parts by weight of 1 parts by weight of antioxidant~5;The weight of 5 parts by weight of coupling agent~10 Part;The parts by weight of 0.01 parts by weight of catalyst~0.1;The polyester polyol is 1 by mass ratio:The crystallinity of (0.25~1.5) Polyester polyol and amorphous polyester polyalcohol;The latent curing agent is aldimine latent curing agent or polybenzobisoxazole alkane latent curing agent.With The prior art is compared, and household electrical appliances provided by the invention use certain content component with reaction type polyurethane hot-melt adhesive, is realized preferable Interaction, obtained product solidification process bubble-free, and there is excellent adhesive property, and water-fast, chemical resistance. Test result indicates that household electrical appliances provided by the invention reaction type polyurethane hot-melt adhesive solidification process bubble-free, and product is viscous Relay is 80kg~92kg, and the bonding force after detergent immersion is 60kg~78kg, the bonding force after alcohol immersion for 36kg~ 50kg。
Embodiment
Below in conjunction with the embodiment of the present invention, technical scheme is clearly and completely described, it is clear that institute The embodiment of description is only part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, Those of ordinary skill in the art's all other embodiments obtained without making creative work, belong to this hair The scope of bright protection.
The present invention provides a kind of household electrical appliances reaction type polyurethane hot-melt adhesive, by the raw material preparation including following components Into:
The parts by weight of 100 parts by weight of polyester polyol~250;
The parts by weight of 1 parts by weight of polyether polyol~150;
The parts by weight of 50 parts by weight of isocyanates~100;
The parts by weight of 70 parts by weight of tackifying resin~150;
The parts by weight of 1 parts by weight of latent curing agent~10;
The parts by weight of 1 parts by weight of antioxidant~5;
The parts by weight of 5 parts by weight of coupling agent~10;
The parts by weight of 0.01 parts by weight of catalyst~0.1;
The polyester polyol is 1 by mass ratio:The crystalline polyester polyols and amorphous polyester of (0.25~1.5) are more First alcohol;
The latent curing agent is aldimine latent curing agent or polybenzobisoxazole alkane latent curing agent.
In the present invention, the polyester polyol is 1 by mass ratio:The crystalline polyester polyols of (0.25~1.5) and Amorphous polyester polyalcohol.In the present invention, the mass ratio of crystalline polyester polyols and the amorphous polyester polyalcohol is 1:(0.25~1.5), is preferably 1:(0.85~1.5).In the present invention, the crystalline polyester polyols primarily serve raising The effect of initial bonding force, while help to shorten the open hour of hot melt adhesive;Meanwhile coordinate amorphous polyester polyalcohol, at it Under his component collective effect, it is possible to increase reaction type polyurethane hot-melt adhesive improves water-fast, resistance to the adhesive properties of polar substrates Chemicals energy.
In the present invention, the hydroxyl value of the crystalline polyester polyols is preferably 21KOH/mg~56KOH/mg, more preferably For 31KOH/mg~36KOH/mg, water content is preferably smaller than equal to 0.1%.In the present invention, the crystalline polyester polyols Be preferably selected from succinic acid-butanediol ester glycol, tetramethylene adipate glycol, ethanedioic acid glycol ester glycol and adipic acid oneself two One or more in alcohol esterdiol, more preferably adipic acid hexylene glycol esterdiol or succinic acid-butanediol ester glycol.The present invention The source of the polyester polyol is not particularly limited, using above-mentioned succinic acid-butanediol ester well known to those skilled in the art Glycol, tetramethylene adipate glycol, the commercial goods of ethanedioic acid glycol ester glycol and adipic acid hexylene glycol esterdiol.
In the present invention, the hydroxyl value of the amorphous polyester polyalcohol is preferably 18KOH/mg~56KOH/mg, more preferably For 21KOH/mg~36KOH/mg, water content is preferably smaller than equal to 0.1%.In the present invention, the amorphous polyester polyalcohol It is preferably selected from ethylene glycol/butanediol/diethylene glycol (DEG)/adipat copolymers, diethylene glycol (DEG)/phthalic anhydride copolymer, neopentyl glycol/phthalic anhydride copolymerization Thing, ethylene glycol/neopentyl glycol/succinic acid/isophthalic acid copolymers and diethylene glycol (DEG)/trimethylolpropane/adipat copolymers In one or more, more preferably neopentyl glycol/phthalic anhydride copolymer or ethylene glycol/neopentyl glycol/succinic acid/M-phthalic acid Copolymer;The present invention is not particularly limited the species of the amorphous polyester polyalcohol and source, using meeting above-mentioned parameter It is required that amorphous polyester polyalcohol commercial goods.
In the present invention, the household electrical appliances include the polyester of the parts by weight of 100 parts by weight~250 with reaction type polyurethane hot-melt adhesive Polyalcohol, is preferably the parts by weight of 185 parts by weight~250.
In the present invention, the hydroxyl value of the polyether polyol is preferably 21KOH/mg~112KOH/mg, more preferably 56KOH/mg, water content are preferably smaller than equal to 0.1%.In the present invention, the polyether polyol is preferably selected from polypropylene oxide One or more in glycol, polypropylene oxide triol and polytetrahydrofuran ether glycol;The present invention is to the polyether polyol Species and source are not particularly limited, using the commercial goods for the polyether polyol for meeting above-mentioned parameter requirement.In this hair In bright, the household electrical appliances include the polyether polyol of the parts by weight of 1 parts by weight~150 with reaction type polyurethane hot-melt adhesive, are preferably 100 The parts by weight of parts by weight~150.
In the present invention, the isocyanates is preferably selected from toluene di-isocyanate(TDI) (TDI), isophorone diisocyanate (IPDI), two isocyanide of methyl diphenylene diisocyanate (MDI), dicyclohexyl methyl hydride diisocyanate (HMDI) and hexa-methylene One or more in acid esters (HDI), more preferably methyl diphenylene diisocyanate (MDI).The present invention is to the isocyanic acid The source of ester is not particularly limited, using above-mentioned toluene di-isocyanate(TDI) (TDI) well known to those skilled in the art, isophorone Diisocyanate (IPDI), methyl diphenylene diisocyanate (MDI), dicyclohexyl methyl hydride diisocyanate (HMDI) and six are sub- The commercial goods of methyl diisocyanate (HDI).In the present invention, the household electrical appliances are included with reaction type polyurethane hot-melt adhesive The isocyanates of the parts by weight of 50 parts by weight~100, is preferably the parts by weight of 65 parts by weight~90.
In the present invention, the tackifying resin is preferably selected from acrylic resin, hydroxyl terminated polyurethane, Petropols, poly- One or more in olefines tackifying resin and terpene resin, more preferably acrylic resin.The present invention sets the thickening The source of fat is not particularly limited, using aforesaid propylene acid resin well known to those skilled in the art, hydroxyl terminated polyurethane, stone The commercial goods of oleoresin, polyolefins tackifying resin and terpene resin.In the present invention, the tackifying resin mainly rises To the effect for improving melt viscosity, reducing mobility.In the present invention, the household electrical appliances include 70 with reaction type polyurethane hot-melt adhesive The tackifying resin of the parts by weight of parts by weight~150, is preferably the parts by weight of 75 parts by weight~100.
In the present invention, the latent curing agent is aldimine latent curing agent or polybenzobisoxazole alkane latent curing agent.The present invention is to described The source of latent curing agent is not particularly limited, using above-mentioned aldimine latent curing agent well known to those skilled in the art and polybenzobisoxazole alkane The commercial goods of latent curing agent.In the present invention, the latent curing agent can cooperate with other components, make to cure Latent curing agent is reacted prior to polyurethane and steam in journey, forms double ammonia structures, then reacts to form cross-linked structure with PUR, is prevented Only curable adhesive layer produces bubble and influences properties of product.In the present invention, the household electrical appliances include 1 with reaction type polyurethane hot-melt adhesive The latent curing agent of the parts by weight of parts by weight~10, is preferably the parts by weight of 3 parts by weight~5.
In the present invention, the antioxidant is preferably selected from 2,6-di-tert-butyl p-methylphenol, four [β-(3,5- bis- tertiary fourths Base -4- hydroxy phenyls) propionic acid] pentaerythritol ester, the β-positive octadecanol ester of (3,5- di-tert-butyl-hydroxy phenyls) propionic acid, three One or more in (2.4- di-tert-butyl-phenyls) phosphite ester and double (3,5- di-tert-butyl-hydroxy phenyl) thioethers, more Preferably 2,6- di-tert-butyl methyl phenols.The present invention is not particularly limited the source of the antioxidant, using this area Above-mentioned 2,6- di-tert-butyl methyl phenols, four [β-(3,5- di-tert-butyl-hydroxy phenyls) propionic acid] known to technical staff Pentaerythritol ester, β-positive octadecanol ester of (3,5- di-tert-butyl-hydroxy phenyls) propionic acid, three (2.4- di-tert-butyl-phenyls) are sub- The commercial goods of phosphate and double (3,5- di-tert-butyl-hydroxy phenyls) thioethers.In the present invention, the household electrical appliances are with instead Answer type polyurethane hot melt adhesive to include the antioxidant of the parts by weight of 1 parts by weight~5, be preferably the parts by weight of 1 parts by weight~2.
In the present invention, the coupling agent is preferably selected from γ-mercaptopropyl trimethoxysilane, gamma-aminopropyl-triethoxy Silane, γ-glycidyl ether oxygen propyl trimethoxy silicane, vinyltrimethoxysilane, γ-three second of isocyanate group propyl group One or more in oxysilane and N- β-(aminoethyl)-γ-aminopropyltrimethoxysilane, more preferably γ-mercapto propyl group Trimethoxy silane or γ-isocyanate group propyl-triethoxysilicane.The present invention is not special to the source of the coupling agent Limitation, using above-mentioned γ-mercaptopropyl trimethoxysilane well known to those skilled in the art, gamma-aminopropyl-triethoxy-silane, γ-glycidyl ether oxygen propyl trimethoxy silicane, vinyltrimethoxysilane, γ-isocyanate group propyl triethoxy The commercial goods of silane and N- β-(aminoethyl)-γ-aminopropyltrimethoxysilane.In the present invention, the household electrical appliances are used Reaction type polyurethane hot-melt adhesive includes the coupling agent of the parts by weight of 5 parts by weight~10, is preferably the parts by weight of 4 parts by weight~5.
In the present invention, the catalyst is preferably selected from dibutyl tin laurate, organo-bismuth, triethylenediamine and two One or more in morpholinyl Anaesthetie Ether (DMDEE), more preferably dibutyl tin laurate, organo-bismuth and dimorpholine base One or both of Anaesthetie Ether (DMDEE).The present invention is not particularly limited the source of the catalyst, using this area Above-mentioned dibutyl tin laurate, organo-bismuth, triethylenediamine and dimorpholine base Anaesthetie Ether known to technical staff (DMDEE) commercial goods.In the present invention, the reaction type polyurethane hot-melt adhesive includes the weight of 0.01 parts by weight~0.1 The antioxidant of part is measured, is preferably 0.1 parts by weight.
Household electrical appliances provided by the invention use certain content component with reaction type polyurethane hot-melt adhesive, realize preferable phase interaction With, obtained product solidification process bubble-free, and there is excellent adhesive property, and water-fast, chemical resistance.
Present invention also offers a kind of preparation side of the household electrical appliances reaction type polyurethane hot-melt adhesive described in above-mentioned technical proposal Method, comprises the following steps:
After crystalline polyester polyols, polyether polyol, amorphous polyester polyalcohol, antioxidant and tackifying resin are mixed Dehydration, adds isocyanates and is reacted, and is eventually adding latent curing agent, coupling agent and catalyst and carries out vacuum defoamation, disperses Reaction type polyurethane hot-melt adhesive is obtained after uniformly.
The present invention is first by crystalline polyester polyols, polyether polyol, amorphous polyester polyalcohol, antioxidant and thickening Resin mixes;The process of the mixing is preferably specially:
Crystalline polyester polyols, polyether polyol, amorphous polyester polyalcohol and antioxidant are mixed, are warming up to 75 DEG C ~85 DEG C, tackifying resin is added, completes mixed process.
In the present invention, the temperature of the dehydration is preferably 105 DEG C~130 DEG C, more preferably 115 DEG C~120 DEG C;It is described The vacuum of dehydration preferably≤- 0.095MPa;The time of the dehydration is preferably 1.5h~2.5h, more preferably 2h.
After completing the dehydration, the present invention adds isocyanates and is reacted in the reaction system;The reaction Temperature is preferably 93 DEG C~98 DEG C, more preferably 95 DEG C;The time of the reaction is preferably 1h~3h, more preferably 2h.
After completing the reaction process, the present invention adds latent curing agent, coupling agent and catalyst and carries out in the reaction system Vacuum defoamation, reaction type polyurethane hot-melt adhesive is obtained after being uniformly dispersed.In the present invention, the time of the vacuum defoamation is preferably 0.5h~1h.
The present invention provides a kind of household electrical appliances reaction type polyurethane hot-melt adhesive and preparation method thereof, the household electrical appliances response type Polyurethane hot melt is prepared by the raw material including following components:The parts by weight of 100 parts by weight of polyester polyol~250;Polyethers The parts by weight of 1 parts by weight of polyalcohol~150;The parts by weight of 50 parts by weight of isocyanates~100;The weight of 70 parts by weight of tackifying resin~150 Measure part;The parts by weight of 1 parts by weight of latent curing agent~10;The parts by weight of 1 parts by weight of antioxidant~5;The weight of 5 parts by weight of coupling agent~10 Part;The parts by weight of 0.01 parts by weight of catalyst~0.1;The polyester polyol is 1 by mass ratio:The crystallinity of (0.25~1.5) Polyester polyol and amorphous polyester polyalcohol;The latent curing agent is aldimine latent curing agent or polybenzobisoxazole alkane latent curing agent.With The prior art is compared, and household electrical appliances provided by the invention use certain content component with reaction type polyurethane hot-melt adhesive, is realized preferable Interaction, obtained product solidification process bubble-free, and there is excellent adhesive property, and water-fast, chemical resistance. Test result indicates that household electrical appliances provided by the invention reaction type polyurethane hot-melt adhesive solidification process bubble-free, and product is viscous Relay is 80kg~92kg, and the bonding force after detergent immersion is 60kg~78kg, the bonding force after alcohol immersion for 36kg~ 50kg。
In order to further illustrate the present invention, it is described in detail below by following embodiments.Following embodiments of the present invention Raw material used is commercial goods, wherein, the amorphous polyester polyalcohol used in embodiment 1~2 and comparative example 1 is new penta 2 The copolyester dihydric alcohol of alcohol/phthalic anhydride;Amorphous polyester polyalcohol used in embodiment 3 is ethylene glycol/neopentyl glycol/fourth two The copolyester dihydric alcohol of acid/M-phthalic acid.
Embodiment 1
The raw materials used formula ratio ginseng of embodiment 1 is shown in Table 1.
The raw materials used formula ratio of 1 embodiment 1 of table
Raw material Parts by weight
Adipic acid hexylene glycol esterdiol (hydroxyl value 31KOH/mg) 100
Polyether polyol (PPG2000, hydroxyl value 56KOH/mg) 150
Amorphous polyester polyalcohol (7250, hydroxyl value 21KOH/mg) 100
MDI 75
Acrylic resin (BR-113) 100
Latent curing agent (polybenzobisoxazole alkane latent curing agent ALT-402) 5
Antioxidant (2,6- di-tert-butyl methyl phenols) 1
Coupling agent (γ-mercaptopropyl trimethoxysilane) 5
Catalyst (DMDEE) 0.1
Adipic acid hexylene glycol esterdiol, polyether polyol, amorphous polyester polyalcohol and antioxidant are added by formula ratio Into reaction kettle, 80 DEG C are warming up to, the acrylic resin (BR-113) of formula ratio is added, is warming up to 115 DEG C~120 DEG C, 2h is dehydrated under the conditions of vacuum≤- 0.095MPa, to water content≤500ppm, 80 DEG C is then cooled to, adds formula ratio MDI, is warming up to 95 DEG C of reaction 2h, to the reaction was complete, is eventually adding the latent curing agent, coupling agent and catalyst of formula ratio, vacuum Deaeration 0.5h~1h, to be dispersed with stirring uniformly after can plastic emitting it is filling, obtain household electrical appliances reaction type polyurethane hot-melt adhesive.
Embodiment 2
The raw materials used formula ratio ginseng of embodiment 2 is shown in Table 2.
The raw materials used formula ratio of 2 embodiment 2 of table
Raw material Parts by weight
Adipic acid hexylene glycol esterdiol (hydroxyl value 31KOH/mg) 100
Polyether polyol (PPG2000, hydroxyl value 56KOH/mg) 100
Amorphous polyester polyalcohol (7250, hydroxyl value 21KOH/mg) 85
MDI 65
Acrylic resin (BR-113) 85
Latent curing agent (polybenzobisoxazole alkane latent curing agent Mega-EH) 3
Antioxidant (2,6- di-tert-butyl methyl phenols) 1
Coupling agent (γ-isocyanate group propyl-triethoxysilicane) 4
Catalyst (dibutyl tin laurate and organo-bismuth, 1:1) 0.1
Adipic acid hexylene glycol esterdiol, polyether polyol, amorphous polyester polyalcohol and antioxidant are added by formula ratio Into reaction kettle, 80 DEG C are warming up to, the acrylic resin (BR-113) of formula ratio is added, is warming up to 115 DEG C~120 DEG C, 2h is dehydrated under the conditions of vacuum≤- 0.095MPa, to water content≤500ppm, 80 DEG C is then cooled to, adds formula ratio MDI, is warming up to 95 DEG C of reaction 2h, to the reaction was complete, is eventually adding the latent curing agent, coupling agent and catalyst of formula ratio, vacuum Deaeration 0.5h~1h, to be dispersed with stirring uniformly after can plastic emitting it is filling, obtain household electrical appliances reaction type polyurethane hot-melt adhesive.
Embodiment 3
The raw materials used formula ratio ginseng of embodiment 3 is shown in Table 3.
The raw materials used formula ratio of 3 embodiment 3 of table
Succinic acid-butanediol ester glycol, polyether polyol, amorphous polyester polyalcohol and antioxidant are added by formula ratio Into reaction kettle, 80 DEG C are warming up to, the acrylic resin (1630) of formula ratio is added, 115 DEG C~120 DEG C is warming up to, true 2h is dehydrated under the conditions of reciprocal of duty cycle≤- 0.095MPa, to water content
≤ 500ppm, is then cooled to 80 DEG C, adds the MDI of formula ratio, is warming up to 95 DEG C of reaction 2h, to the reaction was complete, It is eventually adding the latent curing agent, coupling agent and catalyst of formula ratio, vacuum defoamation 0.5h~1h, to after being dispersed with stirring uniformly Plastic emitting is filling, obtains household electrical appliances reaction type polyurethane hot-melt adhesive.
Comparative example 1
The raw materials used formula ratio ginseng of comparative example 1 is shown in Table 4.
The raw materials used formula ratio of 4 comparative example of table
Raw material Parts by weight
Adipic acid hexylene glycol esterdiol (hydroxyl value 31KOH/mg) 100
Polyether polyol PPG2000 (hydroxyl value 56KOH/mg) 150
Amorphous polyester polyalcohol (7250, hydroxyl value 21KOH/mg) 100
MDI 75
Acrylic resin (BR-113) 100
Antioxidant (2,6- di-tert-butyl methyl phenols) 1
Coupling agent (γ-mercaptopropyl trimethoxysilane) 5
Catalyst (DMDEE) 0.1
Adipic acid hexylene glycol esterdiol, polyether polyol, amorphous polyester polyalcohol and antioxidant are added by formula ratio Into reaction kettle, 80 DEG C are warming up to, the acrylic resin (1630) of formula ratio is added, 115 DEG C~120 DEG C is warming up to, true 2h is dehydrated under the conditions of reciprocal of duty cycle≤- 0.095MPa, to water content≤500ppm, 80 DEG C is then cooled to, adds the MDI of formula ratio, 95 DEG C of reaction 2h are warming up to, to the reaction was complete, are eventually adding the coupling agent and catalyst of formula ratio, vacuum defoamation 0.5h~1h, To be dispersed with stirring uniformly after can plastic emitting it is filling, obtain household electrical appliances reaction type polyurethane hot-melt adhesive.
Comparative example 2
Commercially available household electrical appliances pressure sensitive adhesive tape.
Reaction type polyurethane hot-melt adhesive, the household electrical appliances of the offer of comparative example 2 provided the embodiment of the present invention 1~3 and comparative example 1 It is detected with the properties of pressure sensitive adhesive tape, wherein, bonding force test:Glue will be played and be fully cured or be stained with pressure sensitive adhesive The test sample (panel of refrigerator, cover plate for washing machine) of band is suspended vacantly in test box, and the weight of constant weight is placed in bonding plane Code, observes the weight that can bear;Detergent immersion is tested:Glue will be played and be fully cured or be stained with the test of pressure sensitive adhesive tape Exemplar is fully immersed in 25 DEG C of water, when immersion 336 is small, is taken out and is repeated bonding force test;Alcohol immersion test:Glue will be played Water and it is fully cured or is stained with the test sample of pressure sensitive adhesive tape and be fully immersed in alcohol, takes out and repeat after alcohol completely volatilization Bonding force is tested.As a result ginseng is shown in Table 5.
The family that 5 embodiment of the present invention 1~3 of table and the reaction type polyurethane hot-melt adhesive of the offer of comparative example 1, comparative example 2 provide The properties data of electricity pressure sensitive adhesive tape
As shown in Table 5, the household electrical appliances that the embodiment of the present invention 1~3 provides are with reaction type polyurethane hot-melt adhesive solidification process without gas Bubble, and there is excellent adhesive property, and water-fast, chemical resistance;Meanwhile in applied at elevated temperature, have and suitably open Time and preferable workability are put, non-polar substrate, polar substrates are respectively provided with good adhesive property.
The described above of the disclosed embodiments, enables professional and technical personnel in the field to realize or use the present invention.It is right A variety of modifications of these embodiments will be apparent for those skilled in the art, and as defined herein one As principle can realize in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention will It will not be intended to be limited to the embodiments shown herein, and be to fit to consistent with the principles and novel features disclosed herein Most wide scope.

Claims (10)

1. a kind of household electrical appliances reaction type polyurethane hot-melt adhesive, is prepared by the raw material including following components:
The parts by weight of 100 parts by weight of polyester polyol~250;
The parts by weight of 1 parts by weight of polyether polyol~150;
The parts by weight of 50 parts by weight of isocyanates~100;
The parts by weight of 70 parts by weight of tackifying resin~150;
The parts by weight of 1 parts by weight of latent curing agent~10;
The parts by weight of 1 parts by weight of antioxidant~5;
The parts by weight of 5 parts by weight of coupling agent~10;
The parts by weight of 0.01 parts by weight of catalyst~0.1;
The polyester polyol is 1 by mass ratio:The crystalline polyester polyols and amorphous polyester of (0.25~1.5) are polynary Alcohol;
The latent curing agent is aldimine latent curing agent or polybenzobisoxazole alkane latent curing agent.
2. household electrical appliances reaction type polyurethane hot-melt adhesive according to claim 1, it is characterised in that the crystalline polyester is more First alcohol be selected from succinic acid-butanediol ester glycol, tetramethylene adipate glycol, ethanedioic acid glycol ester glycol and adipic acid oneself two One or more in alcohol esterdiol.
3. household electrical appliances reaction type polyurethane hot-melt adhesive according to claim 1, it is characterised in that the amorphous polyester is more First alcohol is selected from ethylene glycol/butanediol/diethylene glycol (DEG)/adipat copolymers, diethylene glycol (DEG)/phthalic anhydride copolymer, neopentyl glycol/phthalic anhydride copolymerization Thing, ethylene glycol/neopentyl glycol/succinic acid/isophthalic acid copolymers and diethylene glycol (DEG)/trimethylolpropane/adipat copolymers In one or more.
4. household electrical appliances reaction type polyurethane hot-melt adhesive according to claim 1, it is characterised in that the tackifying resin is selected from One or more in acrylic resin, hydroxyl terminated polyurethane, Petropols, polyolefins tackifying resin and terpene resin.
5. household electrical appliances reaction type polyurethane hot-melt adhesive according to claim 1, it is characterised in that the antioxidant is selected from 2, 6- di-tert-butyl methyl phenols, four [β-(3,5- di-tert-butyl-hydroxy phenyls) propionic acid] pentaerythritol esters, β-(3,5- bis- Tert-butyl-hydroxy phenyl) the positive octadecanol ester of propionic acid, three (2.4- di-tert-butyl-phenyls) phosphite esters and double (bis- uncles of 3,5- Butyl -4- hydroxy phenyls) one or more in thioether.
6. household electrical appliances reaction type polyurethane hot-melt adhesive according to claim 1, it is characterised in that the coupling agent is selected from γ-mercaptopropyl trimethoxysilane, gamma-aminopropyl-triethoxy-silane, γ-glycidyl ether oxygen propyl trimethoxy silicane, Vinyltrimethoxysilane, γ-isocyanate group propyl-triethoxysilicane and N- β-(aminoethyl)-γ-aminopropyl front three One or more in oxysilane.
7. household electrical appliances reaction type polyurethane hot-melt adhesive according to claim 1, it is characterised in that the catalyst is selected from two One or more in dibutyl tin laurate, organo-bismuth, triethylenediamine and dimorpholine base Anaesthetie Ether.
8. a kind of preparation method of claim 1~7 any one of them household electrical appliances reaction type polyurethane hot-melt adhesive, including it is following Step:
It is dehydrated after polyester polyol, polyether polyol, antioxidant and tackifying resin are mixed, adds isocyanates and carry out instead Should, it is eventually adding latent curing agent, coupling agent and catalyst and carries out vacuum defoamation, reaction type polyurethane hot melt is obtained after being uniformly dispersed Glue.
9. preparation method according to claim 8, it is characterised in that the temperature of the dehydration is 105 DEG C~130 DEG C, very Reciprocal of duty cycle≤- 0.095MPa, time are 1.5h~2.5h.
10. preparation method according to claim 8, it is characterised in that the temperature of the reaction is 93 DEG C~98 DEG C, the time For 1h~3h.
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