CN106675499A - Solvent-free two-component polyurethane cooking adhesive and preparation method thereof - Google Patents
Solvent-free two-component polyurethane cooking adhesive and preparation method thereof Download PDFInfo
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- CN106675499A CN106675499A CN201611177103.0A CN201611177103A CN106675499A CN 106675499 A CN106675499 A CN 106675499A CN 201611177103 A CN201611177103 A CN 201611177103A CN 106675499 A CN106675499 A CN 106675499A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/36—Hydroxylated esters of higher fatty acids
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
- C08G18/3893—Low-molecular-weight compounds having heteroatoms other than oxygen containing silicon
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
- C08G18/4018—Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4244—Polycondensates having carboxylic or carbonic ester groups in the main chain containing oxygen in the form of ether groups
- C08G18/4247—Polycondensates having carboxylic or carbonic ester groups in the main chain containing oxygen in the form of ether groups derived from polyols containing at least one ether group and polycarboxylic acids
- C08G18/425—Polycondensates having carboxylic or carbonic ester groups in the main chain containing oxygen in the form of ether groups derived from polyols containing at least one ether group and polycarboxylic acids the polyols containing one or two ether groups
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4804—Two or more polyethers of different physical or chemical nature
- C08G18/4812—Mixtures of polyetherdiols with polyetherpolyols having at least three hydroxy groups
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4825—Polyethers containing two hydroxy groups
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
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- C08G18/48—Polyethers
- C08G18/4829—Polyethers containing at least three hydroxy groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
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Abstract
The invention provides a heat-resistant solvent-free two-component polyurethane cooking adhesive. Through introducing a bisphenol A structure polyether and synthesizing appropriate polyester polyol, the temperature resistance and the medium resistance of the adhesive are improved, and the problems of low peeling strength and easiness in delaminating of a common solvent-free adhesive after cooking are solved. The heat-resistant solvent-free two-component polyurethane cooking adhesive is formed by an adhesive A and an adhesive B, wherein the adhesive A is formed by polyester polyol, liquidated-MDI and polyether polyol through an reaction; the adhesive B is formed by bisphenol A structure-contained polyether polyol, a coupling agent and castor oil; the matching ratio of the adhesive A and the adhesive B is 10 to (4 to 5).
Description
Technical field：
The present invention relates to a kind of solvent-free dual-component polyurethane steaming and decocting glue and preparation method thereof.
Background technology：
Solvent-free composite glue has at home and abroad obtained rapid due to its obvious feature of environmental protection, safety and cost advantage
Development and application.As State Council issues《Prevention and control of air pollution action plan》And the continuous improvement of solvent-free technology, commonly
Solvent-free glue can not meet the market demand, especially decocting in water type and steaming and decocting type packaging bag special glue product.Using common
The packaging bag that glue is made its peel strength after high temperature steaming can be greatly lowered, and even can produce delamination when serious, directly
Connect impact normally using to flexible package product.For example, general in the market flexible package glue, although be solvent-free pair of group
Part glue, but its boiling resistance can be poor, and the meat flexible package of many delicatessen, especially prepared food at present will have higher resistance to steaming
Boil requirement, it is desirable to which peel strength requires to be more than or equal to 5 (N.15mm) after 121 DEG C of steaming and decoctings, it is impossible to delamination occurs, and shows
There is peel strength before the steaming and decocting of product to be respectively less than 4 (N.15mm), the peel strength Jing after 121 DEG C of steaming and decoctings is lower.
In order to overcome the shortcomings of that existing product is present, the new demand in market is met, applicant develops a kind of resistant to elevated temperatures
Solvent-free double-constituent polyurethane compound adhesive.
The content of the invention：
It is an object of the invention to provide a kind of resistant to elevated temperatures Solvent-free double-constituent polyurethane compound adhesive, by introducing bisphenol-A
Structural polyether and the suitable PEPA of synthesis, improve the temperature tolerance and anti-medium performance of glue, solve common solvent-free glue
Peel strength is low after water steaming and decocting, easy delamination problem.
The present invention is adopted the technical scheme that：
A kind of solvent-free dual-component polyurethane steaming and decocting adhesive is made up of A glue and B glue, it is characterised in that：A glue is by gathering
Ester polyol, liquefied mdi and polyether polyol reaction form, B glue be by containing structure of bisphenol A polyether polyol, coupling agent and
Oleum Ricini is constituted, and A glue and B glue proportioning are 10:4~5.
In above-mentioned solvent-free dual-component polyurethane steaming and decocting glue, the PEPA be by containing small molecule binary acid with
Dihydroxylic alcohols polycondensation is formed.
Further, described small molecule binary acid is adipic acid, M-phthalic acid, decanedioic acid, p-phthalic acid, adjacent benzene two
One or two mixture in formic anhydride, preferred M-phthalic acid, adipic acid or decanedioic acid；Described dihydroxylic alcohols are second two
Alcohol, diethylene glycol, neopentyl glycol, 1,2 Propylene Glycol, methyl propanediol, glycerol, cyclohexanedimethanol, BDO, 1,6- oneself
One or two mixture in glycol, preferred neopentyl glycol and methyl propanediol.
In above-mentioned solvent-free dual-component polyurethane steaming and decocting glue, described polyether polyol is：Mean molecule quantity 400~
The polypropylene oxide triol of 2000 polyoxypropyleneglycol or 400~500 mean molecule quantities.
In above-mentioned solvent-free dual-component polyurethane steaming and decocting glue, described silane coupler is：The ethoxy of γ-aminopropyl three
Base silane (KH550), γ-aminopropyl trimethoxysilane, N- (2- aminoethyls) -3- aminopropyl trimethoxysilanes, N- (2-
Aminoethyl) -3- aminopropyl triethoxysilanes, anilinomethyl triethoxysilane, 3- methacryloxypropyl trimethoxies
One or more mixture in silane.
In above-mentioned solvent-free dual-component polyurethane steaming and decocting glue, the structure of bisphenol A polyether polyol is containing epoxy knot
The polyether polyol of structure, preferably relative molecular mass 300~500,400. viscosity：2500~5000mPa.s (25 DEG C).
The preparation method of the solvent-free dual-component polyurethane steaming and decocting glue is as follows：
First, the preparation of A glue：
(1) preparation of PEPA：
In with thermometer, agitator, ball cooler, the four-hole boiling flask of nitrogen-sealed pipe, M-phthalic acid is added
270g, diglycol 172g, add adipic acid 237g or decanedioic acid 329g, methyl propanediol 117, neopentyl glycol 203g,
With 0.2~0.25g tetrabutyl titanate catalysts, stir, be then to slowly warm up to 160 DEG C, it is anti-at 160 DEG C~230 DEG C
After answering 14 hours, acid value is surveyed in sampling, if acid value is less than 25mgKOH/g, it is qualified to be esterified, and after esterification is qualified polycondensation reaction is carried out,
Under the conditions of 220~230 DEG C of temperature, evacuation 5 hours under -0.1Mpa obtain acid value≤1mgKOH/g, and hydroxyl value 112 ±
The PEPA of 5mgKOH/g；
(2) preparation of A glue：
By the PEPA 200g obtained after above-mentioned esterifying polycondensation and the polypropylene oxide two of 300g mean molecule quantities 1000
Alcohol and the polypropylene oxide triol of 50g mean molecule quantities 400, the vacuum dehydration under the conditions of 120 DEG C is less than to content of water in system
0.05%, be cooled to 40 DEG C, add 4,4- methyl diphenylene diisocyanates (MDI) 360g reactions, temperature control 80 DEG C ±
5 DEG C, react 5 hours, obtain viscosity at 2000~2500mPa.s/25 DEG C, the main glue of NCO=14~15%；
2nd, the preparation of B glue：
200~300g of bisphenol A polyether, Oleum Ricini 500g and coupling agent 4g are taken, 100~120 DEG C are warming up to, vacuum-
Under the conditions of 0.1MPa, it is dehydrated 2 hours, detection system water content is qualified less than 0.05%, is cooled to 40 DEG C, obtains final product B glue.
Ratio requirement both when the 3rd, using
The proportioning of A glue and B glue is 10 when using:4~5.
By introducing structure of bisphenol A polyethers and the suitable PEPA of synthesis, the temperature tolerance and anti-medium of glue are improved
Performance, solves the problems, such as after common solvent-free glue steaming and decocting that peel strength is low, easy delamination.
Applicant's Jing actual verifications, using this solvent-free dual-component polyurethane steaming and decocting adhesive, by A glue and B glue by weight
Amount proportioning is 10:After 4 mixed guarantors are uniform, PET/CPP, PA/CPP packaging bag is combined respectively, it is ripe in 50~60 DEG C of baking ovens
The intensity for changing 48 hours is respectively 5.2N and 5.4N, and the peel strength after 121 DEG C of steaming and decoctings is as shown in the table.
It was verified that the peel strength of solvent-free dual-component polyurethane steaming and decocting adhesive of the present invention is high, boiling resistance
Can be good, the peel strength after 121 DEG C of steaming and decoctings goes up not down, and has broken the Expected Results for wanting art personnel, ten sub-arguments
Overcome that prior art flexible package glue peel strength is low with thinking, the problem of easy delamination after steaming and decocting.
Specific embodiment：
The present invention is described in further detail below by following example：
Embodiment 1：A kind of solvent-free dual-component polyurethane steaming and decocting adhesive is made up of A glue and B glue, wherein, A glue be by
The reaction of PEPA, liquefied mdi and polyether polyol is formed, and B glue is by containing structure of bisphenol A polyether polyol, coupling agent
Constitute with Oleum Ricini, important proportioning when A glue and B glue are used is 10:4~5.
In above-mentioned solvent-free dual-component polyurethane steaming and decocting glue, described PEPA is by containing small molecule binary acid
Form with dihydroxylic alcohols polycondensation, the small molecule binary acid is adipic acid, M-phthalic acid, decanedioic acid, p-phthalic acid, adjacent benzene two
One or two mixture in formic anhydride, preferred M-phthalic acid, adipic acid or decanedioic acid；Described dihydroxylic alcohols are second two
Alcohol, diethylene glycol, neopentyl glycol, 1,2 Propylene Glycol, methyl propanediol, glycerol, cyclohexanedimethanol, BDO, 1,6- oneself
One or two mixture in glycol, preferred neopentyl glycol and methyl propanediol.
In above-mentioned solvent-free dual-component polyurethane steaming and decocting glue, described polyether polyol is：Mean molecule quantity 400~
The polypropylene oxide triol of 2000 polyoxypropyleneglycol or 400~500 mean molecule quantities.
In above-mentioned solvent-free dual-component polyurethane steaming and decocting glue, described silane coupler is：The ethoxy of γ-aminopropyl three
Base silane (KH550), γ-aminopropyl trimethoxysilane, N- (2- aminoethyls) -3- aminopropyl trimethoxysilanes, N- (2-
Aminoethyl) -3- aminopropyl triethoxysilanes, anilinomethyl triethoxysilane, 3- methacryloxypropyl trimethoxies
One or more mixture in silane；
In above-mentioned solvent-free dual-component polyurethane steaming and decocting glue, the structure of bisphenol A polyether polyol is containing epoxy knot
The polyether polyol of structure, relative molecular mass is 300~500, and preferred molecular mass is 400, and viscosity is 2500~5000mPa.s
(25℃)。
The preparation method of the solvent-free dual-component polyurethane steaming and decocting glue：
The preparation of A glue：
(1) preparation of PEPA：
In with thermometer, agitator, ball cooler, the four-hole boiling flask of nitrogen-sealed pipe, M-phthalic acid is added
270g, diglycol 172g, add adipic acid 237g, methyl propanediol 117, neopentyl glycol 203g, and 0.2~0.25g
Tetrabutyl titanate catalyst, stirs, and is then to slowly warm up to 160 DEG C, after reacting 14 hours at 160 DEG C~230 DEG C, takes
Sample surveys acid value, if acid value is less than 25mgKOH/g, it is qualified to be esterified, and polycondensation reaction is carried out after esterification is qualified, in temperature 220~230
Under the conditions of DEG C, evacuation 5 hours under -0.1Mpa obtain acid value≤1mgKOH/g, the polyester polyols of hydroxyl value 107mgKOH/g
Alcohol.
(2) preparation of A glue
By the PEPA 200g obtained after above-mentioned esterifying polycondensation and the polypropylene oxide two of 300g mean molecule quantities 1000
Alcohol and the polypropylene oxide triol of 50g mean molecule quantities 400, the vacuum dehydration under the conditions of 120 DEG C is less than to content of water in system
0.05%, it is cooled to 40 DEG C and adds 4,4- methyl diphenylene diisocyanates (MDI) 800g reactions, temperature control is at 80 DEG C ± 5
DEG C, react 5 hours, viscosity is obtained at 2500mPa.s/25 DEG C, the A glue of NCO=14.0%.
The preparation of B glue：
Bisphenol A polyether 200g, Oleum Ricini 500g and γ-aminopropyl trimethoxysilane 4g are taken, 100~120 are warming up to
DEG C, under the conditions of vacuum -0.1MPa, it is dehydrated 2 hours, detection system water content is qualified less than 0.05%, is cooled to 40 DEG C.
Using test：
Applicant's Jing actual verifications, using this solvent-free dual-component polyurethane steaming and decocting adhesive, by A glue and B glue by weight
Amount proportioning is 10:After 4 mixed guarantors are uniform, PET/CPP, PA/CPP packaging bag is combined respectively, it is ripe in 50~60 DEG C of baking ovens
The intensity for changing 48 hours is respectively 5.2N and 5.4N, and the peel strength after 121 DEG C of steaming and decoctings is as shown in the table.
And same package is combined with like product on market, the ripening intensity of 48 hours in 50~60 DEG C of baking ovens
Respectively 3.5N and 3.7N, the peel strength after 121 DEG C of steaming and decoctings is as shown in the table.
Illustrate that I is added after bisphenol-A Products, heat resistance is more preferable.
Embodiment 2：
The preparation of A glue：
(1) preparation of PEPA：
In with thermometer, agitator, ball cooler, the four-hole boiling flask of nitrogen-sealed pipe, M-phthalic acid is added
270g, diglycol 172g, add decanedioic acid 329g, methyl propanediol 117, neopentyl glycol 203g, and 0.2~0.25g
Tetrabutyl titanate catalyst, stirs, and is then to slowly warm up to 160 DEG C, after reacting 14 hours at 160 DEG C~230 DEG C, takes
Sample surveys acid value, if acid value is less than 25mgKOH/g, it is qualified to be esterified, and polycondensation reaction is carried out after esterification is qualified, in temperature 220~230
Under the conditions of DEG C, evacuation 5 hours under -0.1Mpa obtain acid value≤1mgKOH/g, the polyester polyols of hydroxyl value 112mgKOH/g
Alcohol.
(2) preparation of A glue：
By the PEPA 200g obtained after above-mentioned esterifying polycondensation and the polypropylene oxide two of 300g mean molecule quantities 1000
Alcohol and the polypropylene oxide triol of 50g mean molecule quantities 400, the vacuum dehydration under the conditions of 120 DEG C is less than to content of water in system
0.05%, be cooled to 40 DEG C, add 4,4- methyl diphenylene diisocyanates (MDI) 800g reactions, temperature control 80 DEG C ±
5 DEG C, react 5 hours, obtain viscosity at 2300mPa.s/25 DEG C, the main glue of NCO=14.5%
The preparation of B glue：
Bisphenol A polyether 250g, Oleum Ricini 500g and γ-aminopropyl triethoxysilane (KH550) 4g are taken, 100 are warming up to
~120 DEG C, under the conditions of vacuum -0.1MPa, it is dehydrated 2 hours, detection system water content is qualified less than 0.05%, is cooled to 40
℃。
Package compound boiling test：
A glue and B glue are pressed into 10:4.5 proportionings, are combined PET/CPP and PA/CPP soft packaging bags, ripe in 50~60 DEG C of baking ovens
The intensity for changing 24 hours is respectively 5.2N and 5.4N, and the peel strength after 121 DEG C of steaming and decoctings is as shown in the table.
And same package is combined with like product on market, the ripening intensity of 48 hours in 50~60 DEG C of baking ovens
Respectively 3.2N and 3.4N, the peel strength after 121 DEG C of steaming and decoctings is as shown in the table.
Embodiment 3：
The preparation of A glue：
(1) preparation of PEPA：
In with thermometer, agitator, ball cooler, the four-hole boiling flask of nitrogen-sealed pipe, M-phthalic acid is added
270g, diglycol 172g, add adipic acid 118.5g and decanedioic acid 164.5g, methyl propanediol 117, neopentyl glycol
203g, and 0.25g tetrabutyl titanate catalysts, stir, and are then to slowly warm up to 160 DEG C, anti-at 160 DEG C~230 DEG C
After answering 14 hours, acid value is surveyed in sampling, if acid value is less than 22mgKOH/g, it is qualified to be esterified, and after esterification is qualified polycondensation reaction is carried out,
Under the conditions of 220~230 DEG C of temperature, evacuation 5 hours under -0.1Mpa obtain acid value≤1mgKOH/g, hydroxyl value
The PEPA of 117mgKOH/g.
(2) preparation of A glue：
By the PEPA 200g obtained after above-mentioned esterifying polycondensation and the polypropylene oxide two of 300g mean molecule quantities 1000
Alcohol and the polypropylene oxide triol of 50g mean molecule quantities 400, the vacuum dehydration under the conditions of 120 DEG C is less than to content of water in system
0.05%, be cooled to 40 DEG C, add 4,4- methyl diphenylene diisocyanates (MDI) 800g reactions, temperature control 80 DEG C ±
5 DEG C, react 5 hours, obtain viscosity at 2000mPa.s/25 DEG C, the main glue of NCO=15%.
The preparation of B glue：
Bisphenol A polyether 300g, Oleum Ricini 500g and γ-aminopropyl trimethoxysilane 4g are taken, 100~120 are warming up to
DEG C, under the conditions of vacuum -0.1MPa, it is dehydrated 2 hours, detection system water content is qualified less than 0.05%, is cooled to 40 DEG C.
Package compound boiling test：
A glue and B glue are pressed into 10:5 proportionings, are combined PET/CPP and PA/CPP soft packaging bags, the ripening in 50~60 DEG C of baking ovens
The intensity of 24 hours is respectively 5.2N and 5.4N, and the peel strength after 121 DEG C of steaming and decoctings is as shown in the table.
And same package is combined with like product on market, the ripening intensity of 48 hours in 50~60 DEG C of baking ovens
Respectively 2.8N and 2.7N, the peel strength after 121 DEG C of steaming and decoctings is as shown in the table.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art the invention discloses technical scope in, the change or replacement that can be readily occurred in,
All should be included within the scope of the present invention.
Claims (7)
1. a kind of solvent-free dual-component polyurethane steaming and decocting adhesive, is made up of A glue and B glue, it is characterised in that：A glue is by polyester
The reaction of polyhydric alcohol, liquefied mdi and polyether polyol is formed, and B glue is by containing structure of bisphenol A polyether polyol, coupling agent and castor
Oleum Sesami is constituted, and A glue and B glue proportioning are 10:4~5.
2. solvent-free dual-component polyurethane steaming and decocting adhesive according to claim 1, is characterized in that：The PEPA is
By forming with dihydroxylic alcohols polycondensation containing small molecule binary acid.
3. solvent-free dual-component polyurethane steaming and decocting adhesive according to claim 2, is characterized in that：Described small molecule binary
Acid is one or two the mixture in adipic acid, M-phthalic acid, decanedioic acid, p-phthalic acid, phthalic anhydride, excellent
Select M-phthalic acid, adipic acid or decanedioic acid；Described dihydroxylic alcohols be ethylene glycol, diethylene glycol, neopentyl glycol, 1,2 Propylene Glycol,
One or two mixture in methyl propanediol, glycerol, cyclohexanedimethanol, BDO, 1,6- hexanediol, preferably
Neopentyl glycol and methyl propanediol.
4. solvent-free dual-component polyurethane steaming and decocting adhesive according to claim 1, is characterized in that：Described polyether polyol
It is the polyoxypropyleneglycol that mean molecule quantity is 400~2000 or the polypropylene oxide three that mean molecule quantity is 400~500
Alcohol.
5. solvent-free dual-component polyurethane steaming and decocting adhesive according to claim 1, is characterized in that：Described silane coupler
For γ-aminopropyl triethoxysilane (KH550), γ-aminopropyl trimethoxysilane, N- (2- aminoethyls) -3- aminopropyls
Trimethoxy silane, N- (2- aminoethyls) -3- aminopropyl triethoxysilanes, anilinomethyl triethoxysilane, 3- methyl-props
One or more mixture in alkene monomethacryloxypropyl trimethoxy silane.
6. solvent-free dual-component polyurethane steaming and decocting adhesive according to claim 1, is characterized in that：The structure of bisphenol A gathers
Ethoxylated polyhydric alcohol is the polyether polyol containing epoxy construction, relative molecular mass 300~500, preferably 400. viscosity：2500~
5000mPa.s(25℃)。
7. the preparation method of solvent-free dual-component polyurethane steaming and decocting glue described in claim 1, comprises the steps：
The preparation of step one, A glue：
(1) preparation of PEPA：
In with thermometer, agitator, ball cooler, the four-hole boiling flask of nitrogen-sealed pipe, M-phthalic acid 270g is added,
Diglycol 172g, adds adipic acid 237g or decanedioic acid 329g, methyl propanediol 117, neopentyl glycol 203g, and 0.2
~0.25g tetrabutyl titanate catalysts, stir, and are then to slowly warm up to 160 DEG C, and reaction 14 is little at 160 DEG C~230 DEG C
Acid value is surveyed in Shi Hou, sampling, if acid value is less than 25mgKOH/g, it is qualified to be esterified, and polycondensation reaction is carried out after esterification is qualified, in temperature
Under the conditions of 220~230 DEG C, evacuation 5 hours under -0.1Mpa obtain acid value≤1mgKOH/g, 112 ± 5mgKOH/g of hydroxyl value
PEPA；
(2) preparation of A glue：
By the PEPA 200g obtained after above-mentioned esterifying polycondensation and the polyoxypropyleneglycol of 300g mean molecule quantities 1000 and
The polypropylene oxide triol of 50g mean molecule quantities 400, vacuum dehydration to content of water in system is less than 0.05% under the conditions of 120 DEG C, drop
Temperature adds 4,4- methyl diphenylene diisocyanates (MDI) 360g reactions to 40 DEG C, temperature control reacts 5 at 80 DEG C ± 5 DEG C
Hour, viscosity is obtained at 2000~2500mPa.s/25 DEG C, the main glue of NCO=14~15%；
The preparation of step 2, B glue：
200~300g of bisphenol A polyether, Oleum Ricini 500g and coupling agent 4g are taken, 100~120 DEG C is warming up to, vacuum -0.1MPa bars
Under part, it is dehydrated 2 hours, detection system water content is qualified less than 0.05%, is cooled to 40 DEG C, obtains final product B glue.
Step 3, use ratio requirement
The proportioning of A glue and B glue is 10 when using:4~5.
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