CN102965064B - Preparation method and applications of solvent-free polyurethane adhesive - Google Patents
Preparation method and applications of solvent-free polyurethane adhesive Download PDFInfo
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- CN102965064B CN102965064B CN201210491788.1A CN201210491788A CN102965064B CN 102965064 B CN102965064 B CN 102965064B CN 201210491788 A CN201210491788 A CN 201210491788A CN 102965064 B CN102965064 B CN 102965064B
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Abstract
The invention relates to a solvent-free polyurethane adhesive and applications thereof. The solvent-free polyurethane adhesive comprises compositions A and B, wherein the softening temperature of the composition A ranges from 30 DEG C to 40 DEG C, and the viscosity of the composition A at 80 DEG C ranges from 10,000 to 40,000mPa.s, the composition A comprises the following ingredients in parts by weight: 80-250 parts of diisocyanate, 150-400 parts of polymer dihydric alcohol, and 20-80 parts of chain extender; and the composition B is an isocyanate prepolymer. The adhesive is solvent-free, has no damage due to evaporation of the solvent, and the property can reach or be superior to that of a solvent type adhesive when used for compounding fabrics.
Description
Technical field
The present invention relates to production of adhesive technical field, particularly a kind of solvent-free polyurethane adhesive preparation and application thereof.
Background technology
Along with the superior requirement to cloth of clothes is more and more higher, common textile cloth has been difficult to satisfy the demand.By sticking with glue agent, the cloth of different sorts, different feels is compound, make it compare with single variety cloth the performance that possesses a lot of excellences, as smooth in cloth performance feel exquisiteness, outward appearance is plentiful, windproof, ventilative, style is novel, unique, possesses certain water-proof function, and heat retention is good, the aspects such as while wear resistance, elastic restoration ratio, intensity all can improve, and are desirable garment materials.
The compound main employing solvent borne polyurethane tackiness agent of current cloth, although adopt this tackiness agent can obtain all good products of various aspects of performance, but because the course of processing has a large amount of solvent evaporates, inflammable and explosive, the healthy and safe of workmen damaged, also environment has been caused to severe contamination simultaneously.If do not use solvent in tackiness agent, can address these problems.
Compound for cloth, conventionally to adopt roller to be coated with technique, tackiness agent (as 80 ℃) under construction temperature is in a liquid state, and has certain viscosity, is cooled to room temperature (25 ℃) and is solid-state after coating, makes compound cloth sizing.
Urethane resin molecular chain has soft section and hard section, and hard section affects the softening melt temperature of resin conventionally.Hard section of urethane is comprised of reacted polyisocyanates or polyisocyanates and chainextender, contains carbamate, replaces urea groups isopolarity group.Polyisocyanates and chainextender are very large on the composition impact of hard section, conventionally the hard section of softening temperature that aromatic polyisocyanate reaction generates is higher than aliphatic polyisocyanates, short by molecular chain, without side group, the chainextender that polarity is strong reacts generation hard section of softening melt temperature with polyisocyanates is high, if instead chainextender molecular chain length has side group, polarity is low, and the hard section of softening melt temperature generating is just low.In addition, the softening melt temperature of urethane resin improves along with the increase of molecular weight within the specific limits, and the molecular weight of urethane also affects the viscosity of melts simultaneously, when its molecular weight is less than a certain critical molecular weight M
ctime, zero of its melt is cut viscosity and is directly proportional to weight-average molecular weight; When molecular weight is greater than M
ctime, zero cuts viscosity sharply increases with the increase of molecular weight, is generally directly proportional to 3.4 powers of weight-average molecular weight.By changing kind and the proportioning of polyisocyanates, chainextender, polyester polyol, regulate the composition of urethane resin soft or hard section and the molecular weight of urethane resin, can control melt temperature and the melt viscosity of urethane resin, make it meet roller and be coated with compound processing requirement.
Because cloth also has the demand of the aspect of performances such as washing, flatiron, fastness in use, simple thermoplastic resin is difficult to meet, and need in tackiness agent, add solidifying agent, curing cross-linked adult form structure, temperature tolerance is good, presses indeformable, washing fastness is good, reaches best use properties.
Patent literature about polyurethane adhesive has a lot, Chinese patent (application number 200910099377.6) has been reported a kind of polyurethane hot melt adhesive for high-grade lining cloth and preparation method thereof, hot melt adhesive has thermoplasticity and is mainly used in adhesive lining field, it does not use solidifying agent, cannot meet the demand of the aspect of performances such as washing, flatiron, fastness.
Summary of the invention
One of technical problem to be solved by this invention is to provide a kind of solvent-free polyurethane adhesive for the existing technical problem of existing polyurethane adhesive, this solvent-free polyurethane adhesive cohesiveness is good, and while using, there is not the harm causing due to solvent evaporates.
Two of technical problem to be solved by this invention is to provide the preparation method of above-mentioned solvent-free polyurethane adhesive.
Technical problem to be solved by this invention can be achieved through the following technical solutions:
A solvent-free polyurethane adhesive, is characterized in that, this solvent-free polyurethane adhesive is comprised of A and two kinds of components of B, wherein, and A component: the mass ratio of B component is 90-95: 5-10;
Described A component, softening temperature is 30 ℃-40 ℃, in the time of 80 ℃, viscosity is 10000-40000mPa.s, by weight, composed of the following components:
Vulcabond 80-250 part;
Polyester diol 150-400 part;
Chainextender 20-80 part;
Described B component is isocyanate prepolymer.
In a preferred embodiment of the present invention, isocyanic ester in described A component is 1, hexamethylene-diisocyanate, isophorone diisocyanate, 1, the mixture of one or more in 4-cyclohexyl diisocyanate, tolylene diisocyanate, diphenylmethanediisocyanate, dimethyl diphenyl vulcabond, naphthalene diisocyanate, hexamethylene diisocyanate performed polymer, liquefaction diphenylmethanediisocyanate.
In a preferred embodiment of the present invention, the polyester diol in described A component is the polyester diol that the number-average molecular weight with pending methyl group that succinic acid-hexanodioic acid-m-phthalic acid mixing acid and diol reaction are made is 500-4500g/mol.
In a more preferred embodiment of the present invention, the mass percent that described m-phthalic acid accounts for succinic acid-hexanodioic acid-m-phthalic acid mixing acid is 10%～50%, the mass ratio of succinic acid and hexanodioic acid is 1: 0.6～1.5, and the mass percent that pending methyl group total mass accounts for polyester diol is 2.5%～10%.
In a more preferred embodiment of the present invention, described dibasic alcohol at least comprises a kind of while in methyl propanediol, neopentyl glycol, 3-methyl pentanediol and at least comprises a kind of in ethylene glycol, 1.3-propylene glycol, butyleneglycol, hexylene glycol, glycol ether.
In a preferred embodiment of the present invention, chainextender in described A component is ethylene glycol, butyleneglycol, neopentyl glycol, 3-methyl pentanediol, 1,6-hexylene glycol, 3,3-dichloro-4,4,4-diphenylmethanediamiand, 4, the mixture of one or more in 4-diaminodiphenyl-methane.
In a preferred embodiment of the present invention, described B component is the isocyanate prepolymer that NCO quality percentage composition that isocyanic ester and TriMethylolPropane(TMP)-Viscotrol C mixture reaction are made is 9%～17%.
In a more preferred embodiment of the present invention, described isocyanic ester is tolylene diisocyanate and diphenylmethanediisocyanate, diphenylmethanediisocyanate, 1 liquefies, one or more mixed isocyanate mixtures in hexamethylene-diisocyanate, wherein to account for isocyanate mixture mass percent be 50%～90% to tolylene diisocyanate.
In a more preferred embodiment of the present invention, the mass percent that described TriMethylolPropane(TMP) accounts for TriMethylolPropane(TMP)-Viscotrol C mixture is 70～95%.
The preparation method of solvent-free polyurethane adhesive of the present invention, is specifically comprised of following steps:
(1) preparation of A component
(a) by the mixture of polyester diol and chainextender, heat fused in atmosphere of inert gases, temperature maintains 70-90 ℃, adds wherein vulcabond, add-on is 40%～70% of vulcabond theoretical value, and wherein theoretical value is that 1:1 calculates by the mol ratio of isocyanic ester and hydroxyl;
(b) after 1-3 hour, add vulcabond, every 0.2-0.7 hour adds once, and the amount of at every turn adding is the 1%-3% of vulcabond theoretical value, when recording 80 ℃, melt viscosity is 10000-40000mPas, stops adding vulcabond, stirs, discharging, obtains A component;
(2) preparation of B component
In the reactor stirring at band, drop into isocyanic ester and TriMethylolPropane(TMP)-Viscotrol C mixture of metering, holding temperature 60-80 ℃ in atmosphere of inert gases, stir titration after 2-4 hour and test residual NCO mass percent, after reaching theoretical value (theoretical value is the percentage ratio that NCO group quality residual after hydroxyl complete reaction accounts for input reactant total mass), stop stirring, discharging obtains B component.
The said application of the present invention refers to the application of described solvent-free polyurethane adhesive in cloth is compound.Specifically refer to: by weight, the B of the A component of 90-95 part and 5-10 part is mixed, be heated to 80 ℃, stir, roller coat is in design on fabric surface, and another cloth is compound with it, is cooled to 25 ℃, slaking 48 hours.
Solvent-free polyurethane adhesive cohesiveness of the present invention is good, and while using, does not have the harm causing due to solvent evaporates.
Embodiment
Below by comparative example and embodiment, further illustrate the present invention.
Embodiment 1
(1) composition of solvent-free polyurethane adhesive:
The component of component A and proportioning thereof:
Diphenylmethanediisocyanate (theoretical value) 118.2g
Polyester diol 175g
Ethylene glycol 23.9g
Polyester diol number-average molecular weight 2000g/mol wherein, succinic acid and hexanodioic acid mass ratio are 1: 0.8, the mass percent that m-phthalic acid accounts for mixing acid is 20%; Dibasic alcohol used is ethylene glycol and neopentyl glycol mixture, and pending methyl group total mass accounts for the mass percent 3% of polyester diol.The component of B component and proportioning thereof:
Wherein the preparation method of component A is: by 175g polyester diol (number-average molecular weight 2000g/mol) and 23.9g ethylene glycol, input is with in the reaction flask stirring, heat fused in nitrogen atmosphere, temperature maintains 80 ± 5 ℃, stir and slowly drop into 59g diphenylmethanediisocyanate (MDI) simultaneously, after 2 hours, add diphenylmethanediisocyanate, add once per half an hour, add 2g at every turn, melt viscosity to be recorded is 80 ℃, and 10000-40000mPas stops adding diphenylmethanediisocyanate, stir, discharging obtains A component.
Wherein the preparation method of B component is: in the reactor stirring at band, drop into tolylene diisocyanate 227.6g, diphenylmethanediisocyanate 97.6g and 92g TriMethylolPropane(TMP) 8g Viscotrol C mixture, holding temperature 60-80 ℃ in atmosphere of inert gases, stir titration after 3 hours and test residual NCO mass percent, after reaching theoretical value 13%, stop stirring, discharging obtains B component.
(2) this solvent-free polyurethane adhesive is used for the using method of cloth compound tense:
Get 95g component A, heat fused, stirs and adds 8g B component simultaneously, and temperature is 80 ℃, and the roller coat that stirs is in design on fabric surface, and another cloth is compound with it, is cooled to 25 ℃, slaking 48 hours.By puller system test cloth composite bed stripping strength, and whether clip 10cm*10cm composite material-feeding batten be positioned over to soak to observe for 72 hours in 50 ℃ of distilled water and shell, and the results are shown in Table 1.
Embodiment 2
(1) composition of solvent-free polyurethane adhesive:
The component of component A and proportioning thereof:
With embodiment 1;
The component of B component and proportioning thereof:
Wherein the preparation method of component A is with embodiment 1.
Wherein the preparation method of B component is: in the reactor stirring at band, drop into tolylene diisocyanate 248.2g, diphenylmethanediisocyanate 106.4g and 92g TriMethylolPropane(TMP) 8g Viscotrol C mixture, holding temperature 60-80 ℃ in atmosphere of inert gases, stir titration after 3 hours and test residual NCO mass percent, after reaching theoretical value 15%, stop stirring, discharging obtains B component.
(2) this solvent-free polyurethane adhesive is used for the using method of cloth compound tense:
Get 95g component A, heat fused, stirs and adds 5g B component simultaneously, and temperature is 80 ℃, and the roller coat that stirs is in design on fabric surface, and another cloth is compound with it, is cooled to 25 ℃, slaking 48 hours.By puller system test cloth composite bed stripping strength, and whether clip 10cm*10cm composite material-feeding batten be positioned over to soak to observe for 72 hours in 50 ℃ of distilled water and shell, and the results are shown in Table 1.
Embodiment 3
(1) composition of solvent-free polyurethane adhesive:
The component of component A and proportioning thereof:
Diphenylmethanediisocyanate (theoretical value) 130g
Polyester diol 120g
Butyleneglycol 36g
Polyester diol number-average molecular weight 1000g/mol wherein, succinic acid and hexanodioic acid mass ratio are 0.8, the mass percent that m-phthalic acid accounts for mixing acid is 20%; Dibasic alcohol used is ethylene glycol and neopentyl glycol mixture, and pending methyl group total mass accounts for the mass percent 3% of polyester diol.
The component of B component and proportioning thereof:
With embodiment 1
Wherein the preparation method of component A is: by 120g polyester diol (number-average molecular weight 1000g/mol), 36g butyleneglycol, input is with in the reaction flask stirring, heat fused in nitrogen atmosphere, temperature maintains 80 ± 5 ℃, stir and slowly drop into 52g diphenylmethanediisocyanate simultaneously, after 2 hours, add diphenylmethanediisocyanate, add once per half an hour, add 2g at every turn, melt viscosity to be recorded is 80 ℃, and 10000-40000mPas stops adding diphenylmethanediisocyanate, stir, discharging obtains A component.
The preparation method of B component is with embodiment 1.
(2) this solvent-free polyurethane adhesive is used for the using method of cloth compound tense:
Get 95g component A, heat fused, stirs and adds 5g B component simultaneously, and temperature is 80 ℃, and the roller coat that stirs is in design on fabric surface, and another cloth is compound with it, is cooled to 25 ℃, slaking 48 hours.By puller system test cloth composite bed stripping strength, and whether clip 10cm*10cm composite material-feeding batten be positioned over to soak to observe for 72 hours in 50 ℃ of distilled water and shell, and the results are shown in Table 1.
Embodiment 4
(1) composition of solvent-free polyurethane adhesive:
The component of component A and proportioning thereof:
With embodiment 3;
The component of B component and proportioning thereof:
With embodiment 2
Wherein the preparation method of component A is with embodiment 3.
The preparation method of B component is with embodiment 2.
(2) this solvent-free polyurethane adhesive is used for the using method of cloth compound tense:
Get 92g component A, heat fused, stirs and adds 8g B component simultaneously, and temperature is 80 ℃, and the roller coat that stirs is in design on fabric surface, and another cloth is compound with it, is cooled to 25 ℃, slaking 48 hours.By puller system test cloth composite bed stripping strength, and whether clip 10cm*10cm composite material-feeding batten be positioned over to soak to observe for 72 hours in 50 ℃ of distilled water and shell, and the results are shown in Table 1.
Embodiment 5
(1) component of the composition of solvent-free polyurethane adhesive: component A and proportioning thereof:
Wherein polyester diol is with embodiment 1
The component of B component and proportioning thereof:
With embodiment 2
The preparation method of component A is: by 180g polyester diol (number-average molecular weight 2000g/mol), 36g butyleneglycol, 26.7g3, 3-dichloro-4,4, 4-diphenylmethanediamiand, input is with in the reaction flask stirring, heat fused in nitrogen atmosphere, temperature maintains 80 ± 5 ℃, stir and slowly drop into tolylene diisocyanate (TDI) simultaneously, after 2 hours, add tolylene diisocyanate, add once per half an hour, add 2g at every turn, melt viscosity to be recorded is 80 ℃, 10000-40000mPas, stop adding tolylene diisocyanate (TDI), stir, discharging obtains A component.
The preparation method of B component is with embodiment 2.
(2) this solvent-free polyurethane adhesive is used for the using method of cloth compound tense:
Get 92g component A, heat fused, stirs and adds 9g B component simultaneously, and temperature is 80 ℃, and the roller coat that stirs is in design on fabric surface, and another cloth is compound with it, is cooled to 25 ℃, slaking 48 hours.By puller system test cloth composite bed stripping strength, and whether clip 10cm*10cm composite material-feeding batten be positioned over to soak to observe for 72 hours in 50 ℃ of distilled water and shell, and the results are shown in Table 1.
Comparative example 1
Get commercially available solvent-borne type cloth composite adhesive (trade mark HDBA-1165), its suggested formula: 100gHDBA-1165,13g solidifying agent N-75, roller coat is in design on fabric surface, and another cloth is compound with it, is cooled to 25 ℃, slaking 48 hours.By puller system test cloth composite bed stripping strength, and whether clip 10cm*10cm composite material-feeding batten be positioned over to soak to observe for 72 hours in 50 ℃ of distilled water and shell, and the results are shown in Table 1.
Table 1
| Sample | Stripping strength N/2.5cm | 50 ℃ of distilled water immersions 72 hours |
| Embodiment 1 | 30 | Not shelling |
| Embodiment 2 | 28 | Not shelling |
| Embodiment 3 | 25 | Not shelling |
| Embodiment 4 | 32 | Not shelling |
| Embodiment 5 | Base cloth is torn | Not shelling |
| Comparative example | 25 | Not shelling |
Note: cloth is woven fabric
As can be seen from Table 1, solvent-free polyurethane adhesive of the present invention, compound for cloth, its performance is equivalent to or is better than solvent-based adhesive, completely can replace solvents type tackiness agent, due to not containing solvent, during use, do not exist to the harm of environment solvent flashing, there is good environmental compatibility and wide application prospect.
Claims (7)
1. a solvent-free polyurethane adhesive, is characterized in that, this solvent-free polyurethane adhesive is comprised of A and two kinds of components of B, wherein, and A component: the mass ratio of B component is 90-95: 5-10;
Described A component, softening temperature is 30 ℃-40 ℃, in the time of 80 ℃, viscosity is 10000-40000mPas, by weight, composed of the following components:
Vulcabond 80-250 part;
Polyester diol 150-400 part;
Chainextender 20-80 part;
Described B component is isocyanate prepolymer;
Polyester diol in described A component is the polyester diol that the number-average molecular weight with pending methyl group that succinic acid-hexanodioic acid-m-phthalic acid mixing acid and diol reaction are made is 500-4500g/mol;
The mass percent that described m-phthalic acid accounts for succinic acid-hexanodioic acid-m-phthalic acid mixing acid is 10%～50%, and the mass ratio of succinic acid and hexanodioic acid is 1: 0.6～1.5, and the mass percent that pending methyl group total mass accounts for polyester diol is 2.5%～10%;
Described dibasic alcohol at least comprises a kind of while in methyl propanediol, neopentyl glycol, 3-methyl pentanediol and at least comprises a kind of in ethylene glycol, 1.3-propylene glycol, butyleneglycol, hexylene glycol, glycol ether;
Described B component is the isocyanate prepolymer that NCO quality percentage composition that isocyanic ester and TriMethylolPropane(TMP)-Viscotrol C mixture reaction are made is 9%～17%; The mass percent that TriMethylolPropane(TMP) accounts for TriMethylolPropane(TMP)-Viscotrol C mixture is 70～95%.
2. solvent-free polyurethane adhesive as claimed in claim 1, it is characterized in that, vulcabond in described A component is 1, hexamethylene-diisocyanate, isophorone diisocyanate, 1, the mixture of one or more in 4-cyclohexyl diisocyanate, tolylene diisocyanate, diphenylmethanediisocyanate, dimethyl diphenyl vulcabond, naphthalene diisocyanate, hexamethylene diisocyanate performed polymer, liquefaction diphenylmethanediisocyanate.
3. solvent-free polyurethane adhesive as claimed in claim 1, it is characterized in that, chainextender in described A component is ethylene glycol, butyleneglycol, neopentyl glycol, 3-methyl pentanediol, 1,6-hexylene glycol, 3,3-bis-chloro-4,4-diphenylmethanediamiand, 4, the mixture of one or more in 4-diaminodiphenyl-methane.
4. solvent-free polyurethane adhesive as claimed in claim 1, it is characterized in that, the isocyanic ester of preparation B component isocyanate prepolymer is tolylene diisocyanate and diphenylmethanediisocyanate, diphenylmethanediisocyanate, 1 liquefies, one or more mixed isocyanate mixtures in hexamethylene-diisocyanate, wherein to account for isocyanate mixture mass percent be 50%～90% to tolylene diisocyanate.
5. the preparation method of the solvent-free polyurethane adhesive described in claim 1 to 4 any one claim, is specifically comprised of following steps:
(1) preparation of A component
(a) by the mixture of polyester diol and chainextender, drop in the reactor of band stirring, heat fused in atmosphere of inert gases, temperature maintains 70-90 ℃, stir and add wherein vulcabond simultaneously, add-on is 40%～70% of vulcabond theoretical value, and wherein theoretical value is that 1:1 calculates by the mol ratio of isocyanic ester and hydroxyl;
(b) after 1-3 hour, add vulcabond, every 0.2-0.7 hour adds once, and the amount of at every turn adding is the 1%-3% of vulcabond theoretical value, when recording 80 ℃, melt viscosity is 10000-40000mPas, stops adding vulcabond, stirs, discharging, obtains A component;
(2) preparation of B component
In the reactor stirring at band, drop into isocyanic ester and TriMethylolPropane(TMP)-Viscotrol C mixture of metering, holding temperature 60-80 ℃ in atmosphere of inert gases, stir titration after 2-4 hour and test residual NCO mass percent, reach after theoretical value and stop stirring, discharging obtains B component.
6. the application of the solvent-free polyurethane adhesive described in claim 1 to 4 any one claim in cloth is compound.
7. application claimed in claim 6, is characterized in that, by weight, the B of the A component of 90-95 part and 5-10 part is mixed, and is heated to 80 ℃, stirs, and roller coat is in design on fabric surface, and another cloth is compound with it, is cooled to 25 ℃, slaking 48 hours.
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| CN107760014A (en) * | 2017-10-31 | 2018-03-06 | 山东诺威聚氨酯股份有限公司 | Solvent-resisting TPUE and preparation method thereof |
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| US6365700B1 (en) * | 1999-06-07 | 2002-04-02 | National Starch And Chemical Investment Holding Corporation | High green strength reactive hot melt by a prepolymerization in the main reactor |
| CN101289602A (en) * | 2008-05-22 | 2008-10-22 | 上海世鹏聚氨酯科技发展有限公司 | Liquid solvent-free environment-protection nano-high molecule spinning and adhering material |
| CN101570676B (en) * | 2009-06-04 | 2012-01-04 | 长兴三伟热熔胶有限公司 | Polyurethane hot melt adhesive for high-grade lining cloth and preparation method thereof |
| CN102533203B (en) * | 2012-03-07 | 2013-10-30 | 北京高盟新材料股份有限公司 | Method for preparing flame-retardant and alkali-resistant polyurethane adhesive |
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| CN107760014A (en) * | 2017-10-31 | 2018-03-06 | 山东诺威聚氨酯股份有限公司 | Solvent-resisting TPUE and preparation method thereof |
| CN107760014B (en) * | 2017-10-31 | 2021-03-26 | 山东一诺威聚氨酯股份有限公司 | Solvent-resistant thermoplastic polyurethane elastomer and preparation method thereof |
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