CN103254868B - Hot melt adhesive - Google Patents
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- CN103254868B CN103254868B CN201310186040.5A CN201310186040A CN103254868B CN 103254868 B CN103254868 B CN 103254868B CN 201310186040 A CN201310186040 A CN 201310186040A CN 103254868 B CN103254868 B CN 103254868B
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Abstract
The invention discloses polyamide hot melt adhesive. Main raw materials of the polyamide hot melt adhesive are pentamethylene diamine and aliphatic dicarboxylic acid, wherein at least one of the main raw materials is prepared through a biological method. The hot melt adhesive has the advantages of environmental friendliness and renewability, the mechanics property is equivalent to that of the existing hot melt adhesive, and the hot melt adhesive can substitute the existing hot melt adhesive to be applied to the fields such as fiber textile adhesion, shoemaking lasting, electric appliances, mechanical industry, metal, manufacturing of plastic layering composite material, automobile, civil construction and furniture and has a promising application prospect.
Description
Technical field
The invention belongs to technical field of polymer materials, specifically, the present invention relates to the polyamide hot that pentamethylene diamine is raw material.
Background technology
Polyamide hot be take polyamide resin as matrix, and polyamide resin is with the line style thermoplastic resin of many recurring amide radicals on molecular chain.The most outstanding advantage of this class sizing agent is that fusion range is narrow, not softening below fusing point, the a little higher than fusing point of temperature melts immediately, compare with other thermoplastic resins, when it is in heating or when cooling, the melting of resin or solidify all occurs in narrower temperature range, and this feature can be used for to the exigent occasion of curing speed polyamide hot.When constructing, cooling can solidifying rapidly a little after heating and melting coating; Approaching at the temperature of softening temperature, still there is good adhesiveproperties.In addition, owing to containing amino, carboxyl and amide group isopolarity group in its molecular structure, many polar materials are had to good cementability, add its good oil resistant, solvent resistance, making it in sizing agent industry, have special status, is a kind of generally acknowledged high-grade sizing agent.
At present, most nylon hot-melt adhesives are all to using the derivative of oil to make as raw material, raw material hexanolactam and hexanodioic acid such as nylon 6 and nylon salt make through series reaction such as hydrogenation reoxidize by benzene class homologue, and hexanediamine is by catalytic hydrogenation method, to make by divinyl or the first Adiponitrile of vinyl cyanide again; The raw material omega-amino-undeeanoic acid of nylon 11 is to take Viscotrol C as raw material, first through methanolysis, becomes undecylenic acid, and again through bromination, ammonification makes; The production method of the raw material lauryl lactan of nylon 12 is to adopt oxidation oximate method, by divinyl, with Z-type catalyst, take benzene and obtain cyclisation 12 carbon triolefins as solvent trimerization, then obtain cyclododecane through hydrogenation, again through oxidation, ketonize oximate, Beckmann rearrangement makes.These synthesis techniques are chemical method operational hazards, and synthesis technique is complicated simultaneously, and have certain pollution.
At present, Long Carbon Chain Polyamide hot melt adhesive, generally adopts long carbochain biatomic acid to obtain long carbon chain nylon salt by nitrilation, hydrogenation, neutralization, and then obtains polyamide hot with the method for the copolymerizations such as hexanolactam, nylon salt and Nylon-1010 Salt
For a long time, people wait in expectation and use the plant resources of growing by absorbing carbon dioxide from air as parent material, and wait green method to prepare the green polyamide hot suitable with existing hot melt adhesive varieties and characteristics by fermentation, the dependence of solution to non-renewable energy, builds Circular Society Construction.
Long carbochain biatomic acids more than current ten carbon can utilize lauric acid, castor-oil plant wet goods plant resources to make for the method for raw material by fermentation.In hafnia alvei (Hafnia.Alvei), there is a kind of lysine decarboxylase (L-lysine decarboxylase in discovered in recent years, EC4.1.1.18), it can act on Methionin and make 1,5-pentamethylene diamine (abbreviation pentamethylene diamine) by the method decarboxylation of fermenting.Because pentamethylene diamine is a kind of odd number carbon diamine, common all diprotic acid and diamine different from the past, it is hydrogen bond between saboteur effectively, thereby is easier to adjust hot melt adhesive melting range, and keeps the cohesive strength of polyamide hot excellence.
Summary of the invention
In order to solve, using the problem that the derivative of oil prepares polyamide hot complex process and have pollution as raw material, the polyamide hot that present inventor provides a kind of pentamethylene diamine of usining Biological preparation or aliphatic dibasic acid to combine preparation with other components as raw material.
Therefore, first object of the present invention is to provide a kind of polyamide hot.
Second object of the present invention is to provide the composition that comprises above-mentioned polyamide hot.
The 3rd object of the present invention is to provide a kind of preparation method of above-mentioned polyamide hot.
The invention discloses a kind of polyamide hot, the raw material of described polyamide hot comprises at least one aliphatic dibasic acid, at least one diamine and outer adding assistant, and wherein, described diamine comprises pentamethylene diamine.
According to the present invention, in described aliphatic dibasic acid and described diamine, have at least a kind of by Biological preparation.
According to the present invention, the organic carbon that described aliphatic dibasic acid comprises the renewable source that meets ASTM D6866 standard is or/and the organic carbon that described diamine comprises the renewable source that meets ASTM D6866 standard.
According to the present invention, described diprotic acid can be short chain diprotic acid (in carbochain, carbonatoms is less than 10), comprises succinic acid, pentanedioic acid, hexanodioic acid, pimelic acid, suberic acid, nonane diacid, sebacic acid, preferred hexanodioic acid, sebacic acid; Also can be long carbochain biatomic acid, comprise DC11, SL-AH, tridecanyldicarboxylic acid, DC14,15 carbon dicarboxylic acids, 16-dicarboxylic acid, DC17, DC18, toxilic acid, Δ
9-1,18 octadecylene diprotic acid, preferably SL-AH; Also can be that dimeracid comprises soya fatty acid, ready denier oil acid or oleic acid.Most preferred, described aliphatic dibasic acid is succinic acid, or two kinds and above diprotic acid mixture in the carbonatoms diprotic acid that is 11～20.
According to the present invention, described diamine can be short chain diamine (in carbochain, carbonatoms is less than 10), comprises quadrol, butanediamine, pentamethylene diamine, hexanediamine, heptamethylene diamine, octamethylenediamine, nonamethylene diamine, decamethylene diamine, diethylenetriamine, 2 methyl pentamethylenediamine, triethylene-tetramine, alkanolamine, the preferably pentamethylene diamine of Biological preparation; Also can be long-chain diamine, comprise 11 carbon diamines, 12 carbon diamines, 13 carbon diamines, 14 carbon diamines, 15 carbon diamines, 16 carbon diamines, 17 carbon diamines, 18 carbon diamines, polyoxypropylene diamine, preferably 12 carbon diamines; Also can be containing phenyl ring diamine, comprise O-Phenylene Diamine, mphenylenediamine, Ursol D, xylylene diamines.Most preferred, described aliphatic diamine is pentamethylene diamine, two kinds and above mixture in the diamine that mphenylenediamine or carbonatoms are 11～20.
According to the present invention, described outer adding assistant is comprised of molecular weight regulator, oxidation inhibitor, lubricant, anti-hard caking agent, anti blocking agent, antiaging agent, white dyes, setting accelerator, and parts by weight are:
Wherein, described molecular weight regulator is a kind of in hexanodioic acid, lauric acid, SL-AH, Glacial acetic acid, propionic acid, phenylformic acid or stearic acid; Described oxidation inhibitor is a kind of in phosphorous acid esters and substituent, Hinered phenols, the aromatic amine that is obstructed, hydroquinones, antioxidant 1010 or oxidation inhibitor 1098; Described release agent or lubricant are a kind of in fatty alcohol, aliphatic amide, aliphatics diamide, two urea, polyethylene wax, calcium stearate, Zinic stearas or ethylene bis stearamide (EBS); Described anti-hard caking agent is aerosil; Described antiaging agent is a kind of in dihydroxy-benzene class, salicylate class, benzotriazole category, benzophenone, hindered amines; Described white dyes is a kind of in PL-01, PL-02, PL-03, EBF, VBL; Described nucleator is a kind of in the metal oxides such as talcum powder, kaolin, boron nitride, aluminum oxide, magnesium oxide or silicon-dioxide.
According to the present invention, the raw material of described polyamide hot also comprises one or more in nylon salt, amino acid, lactan.
According to the present invention, described nylon salt is that above-mentioned diamine reacts prepared nylon salt with diprotic acid.Can be diamine and diprotic acid in water or organic solvent after salify recrystallization make, can be also commercially available direct purchase.Comprise nylon 56 salt, nylon salt, nylon 510 salt, NYLON610 salt, nylon 512 salt, nylon 612 salt, Nylon-1010 Salt, Nylon 1012 salt, one or more arbitrary proportions of nylon 1212 salt mix.
According to the present invention, described amino acid is selected from 8-aminocaprylic acid, the amino undecanoic acid of 11-, 12 amino dodecanoic acid.
According to the present invention, described lactan is selected from ε-caprolactam, 8-spicy inner formyl amine or ω-lauryl lactam.
According to the present invention, described polyamide hot is comprised of the raw material of following parts by weight:
The preparation method of polyamide hot of the present invention comprises and comprising the following steps:
Polymerization: polyamide hot raw material is dropped into autoclave, vacuumize and inflated with nitrogen, polymerization temperature is 180～290 ℃, starts pressurize exhaust when pressure reaches 1.0～1.8MPa, treats that temperature in the kettle reaches 190～250 ℃ of increasing exhaust pressure and is down to normal pressure, continue reaction 0.5～2 hour, be evacuated to-0.01～-0.1MPa(gauge pressure), keep this vacuum tightness 2～60min, add part of auxiliary, in reaction vessel, be filled with nitrogen to pressure 0.1～0.8MPa, start wire drawing, granulation;
Pulverize: add alcoholic solvent to dissolve polyamide hot particle, then precipitating obtains polyamide hot-melt adhesive powder end, through washing, oven dry, polyamide hot then sieves to obtain; Or
After polyamide hot particle is dried, drop into deep cooling crush machine, by cooled with liquid nitrogen, carry out deep cooling crush, under air-tight state, the polyamide hot-melt adhesive powder end after pulverizing is risen to room temperature, polyamide hot then sieves to obtain.
According to the present invention, described in also add respectively calcium stearate, Resorcinol and the aerosil of 0.1-0.3% parts by weight before sieving.
Beneficial effect of the present invention:
1, the main raw material of polyamide hot of the present invention is pentamethylene diamine or the aliphatic dibasic acid of Biological preparation, there is green reproducible advantage, and pentamethylene diamine is odd numbers of carbon atoms diamine, be different from traditional even carbon atom diamine, diprotic acid, be more conducive to hydrogen bond between saboteur, melting point depression is easier to regulation and control, and water resistant is washed, dry-cleaning performance is suitable with existing hot melt adhesive, produce easily simple, equipment requirements is low, convenient operation and control, accurately, guaranteed the steady quality of product, product adhesive property is good, can be mass-produced, also can small serial production, flexibly and easily, be with a wide range of applications.
2, the preparation method of polyamide hot of the present invention, by diprotic acid, diamine, nylon salt, amino acid, lactan and various additive direct copolymerization, through modification, pulverizing, make again, optimize Long Carbon Chain Polyamide hot melt adhesive by operations such as nitrilation, hydrogenation, neutralizations, simplified the production technique of polyamide hot, shortened the production cycle, low for equipment requirements, control conveniently, accurately raw material environmental protection, constant product quality.
Embodiment
Below in conjunction with specific embodiment, the present invention will be further described.Should be understood that following examples are only for the present invention is described but not for limiting the scope of the invention.
In the present invention, described pentamethylene diamine can be to prepare by chemical method, also can adopt Biological preparation.Those skilled in the art can know, Methionin (salt), under the effect of lysine decarboxylase (EC4.1.1.18), is sloughed to two ends carboxyl, generates pentamethylene diamine.In " 1B decarboxylase character and applied research " (Jiang Lili, Nanjing University, Master's thesis, 2007), concrete Biological preparation pentamethylene diamine method is disclosed for example.In " research that microbial transformation 1B is cadaverine " (Zhu Jing, University Of Science and Technology Of Tianjin, Master's thesis, 2009.3), concrete Biological preparation pentamethylene diamine method is disclosed for example.
In the present invention, described aliphatic dibasic acid can be to prepare by chemical method, also can pass through Biological preparation.For example, Chinese patent literature (application number: 201210392035.5) disclose the method for preparing succinic acid.For example, Chinese patent literature (patent No. ZL200410018255.7 and ZL200610029784.6) discloses the method for preparing long-chain biatomic acid.
All characteristics in embodiment and comparative example are all to measure by the following method.
1. fusing point Tm
Adopt Perkin Elmer DSC-6 analytical instrument test sample fusing point, nitrogen atmosphere, flow velocity is 40mL/min.During test, first with 10 ℃/min, be warming up to 290 ℃, at 290 ℃, keep 3min, then with 10 ℃/min, be cooled to 30 ℃, then be warming up to 290 ℃ with 10 ℃/min, endotherm peak temperature is now made as to fusing point Tm.
2. stripping strength
Press FZ/T01085-2009 standard detection.
embodiment 1
Polymerization: by hexanodioic acid 1.0kg, suberic acid 1.8kg, DC14 2.7kg, dimeracid 5.2kg, acetic acid 0.3kg, pentamethylene diamine 3.8kg, hexanolactam 6.3kg, laurolactam 3.3kg, phosphorous acid 80g, water 1.1kg and polyethylene wax 60g are fed in 100 liters of polymeric kettles (K/SY166-2007 type), vacuumize and inflated with nitrogen 3 times, air in displacement still, oil bath temperature progressively rises to 260～265 ℃, when still internal pressure rises to 1.2MPa, slowly open blow-off valve on still, make pressure keep 1.2MPa, when temperature in the kettle reaches 225 ℃, slowly drive large blow-off valve, make still internal pressure from 1.2MPa, evenly be down to normal pressure in 2 hours, maintain normal pressure after 1 hour, be evacuated to-0.05Mpa(gauge pressure), keep this vacuum tightness 2min, in polymeric kettle, be filled with nitrogen to pressure 0.3MPa, start melting discharging, and utilize dicing machine (electromagnetic variable speed motor 300 type cantilevereds) granulation, 80 ℃ of dry vacuum-drying 8 hours.
Pulverize: polyamide particles is immersed in-196 ℃ of liquid nitrogen, be added to and in pulley pulverizer, carry out freezing and pulverizing, under air-tight state, treat that hot melt adhesive rises to room temperature, add 0.1% calcium stearate, 0.1% Resorcinol and 0.3% aerosil, through vibratory screening apparatus, by the large small packages of different grain size, obtain polyamide hot finished product again.Fusing point and performance test results are shown in table 1.
embodiment 2
Polymerization: by hexanodioic acid 1.0kg, DC11 5.2kg, dimeracid 4.3kg, butyric acid 0.3kg, pentamethylene diamine 1.5kg, octamethylenediamine 3.5kg, 8-spicy inner formyl amine 4.1kg, 12 amino dodecanoic acid 5.3kg, inferior sodium phosphate 60g, water 0.5kg and polyethylene wax 60g are fed in 100 liters of polymeric kettles (K/SY166-2007 type), vacuumize and inflated with nitrogen 3 times, air in displacement still, oil bath temperature progressively rises to 270～275 ℃, when still internal pressure rises to 1.5MPa, slowly open blow-off valve on still, make pressure keep 1.5MPa, when temperature in the kettle reaches 230 ℃, slowly drive large blow-off valve, make still internal pressure from 1.5MPa, evenly be down to normal pressure in 2 hours, maintain normal pressure after 1 hour, be evacuated to-0.05MPa(gauge pressure), keep this vacuum tightness 2min, in polymeric kettle, be filled with nitrogen to pressure 0.4MPa, start melting discharging, and utilize dicing machine (electromagnetic variable speed motor 300 type cantilevereds) granulation, 80 ℃ of dry vacuum-drying 8 hours.
Pulverize: polyamide hot is dropped into autoclave, add ethanol (according to different Grained Requirements, need different consumptions, consumption is large, fine powder content is high, otherwise, meal content is high, general control is 1:3～1:5 at the mass ratio of polyamide hot and ethanol) dissolve, 150 ℃ of temperature, under pressure 1.0MPa, polyamide hot is dissolved in ethanol, then through cooling, precipitating obtains polyamide hot-melt adhesive powder end, finally by distilled water, the conventional washing of softening water or deionized water, dry, add 0.1% calcium stearate, 0.1% Resorcinol and 0.3% aerosil sieve, obtain polyamide hot finished product.Fusing point and performance test results are shown in table 1.
embodiment 3
Polymerization: by hexanodioic acid 2.7kg, sebacic acid 2.4kg, DC14 3.0kg, dimeracid 2.5kg, propionic acid 0.3kg, pentamethylene diamine 2.2kg, octamethylenediamine 1.9kg, decamethylene diamine 2.2kg, hexanolactam 3.9kg, laurolactam 4.2kg, phosphorous acid 80g, water 0.4kg and polyethylene wax 60g are fed in 100 liters of polymeric kettles (K/SY166-2007 type), vacuumize and inflated with nitrogen 3 times, air in displacement still, oil bath temperature progressively rises to 260～265 ℃, when still internal pressure rises to 1.7MPa, slowly open blow-off valve on still, make pressure keep 1.7MPa, when temperature in the kettle reaches 245 ℃, slowly drive large blow-off valve, make still internal pressure from 1.7MPa, evenly be down to normal pressure in 2 hours, maintain normal pressure after 1 hour, be evacuated to-0.05MPa(gauge pressure), keep this vacuum tightness 2min, in polymeric kettle, be filled with nitrogen to pressure 0.5MPa, start melting discharging, and utilize dicing machine (electromagnetic variable speed motor 300 type cantilevereds) granulation, 80 ℃ of dry vacuum-drying 8 hours.
Pulverize: polyamide particles is immersed in-196 ℃ of liquid nitrogen, be added to and in pulley pulverizer, carry out freezing and pulverizing, under air-tight state, treat that hot melt adhesive rises to room temperature, add 0.1% calcium stearate, 0.1% Resorcinol and 0.3% aerosil, through vibratory screening apparatus, by the large small packages of different grain size, obtain polyamide hot finished product again.Fusing point and performance test results are shown in table 1.
embodiment 4
Polymerization: by SL-AH 9.0kg, pentamethylene diamine 3.2kg, mphenylenediamine 2.0kg, hexanolactam 9.0kg, nylon salt 6.6kg and hexanodioic acid 0.3kg, inferior sodium phosphate 30g, polyethylene wax 60g is fed in 100 liters of polymeric kettles (K/SY166-2007 type), vacuumize and inflated with nitrogen 3 times, air in displacement still, oil bath temperature progressively rises to 280～285 ℃, when still internal pressure rises to 1.5MPa, slowly open blow-off valve on still, make pressure keep 1.5MPa, when temperature in the kettle reaches 240 ℃, slowly drive large blow-off valve, make still internal pressure from 1.5MPa, evenly be down to normal pressure in 2 hours, maintain normal pressure after 1 hour, be evacuated to-0.05MPa(gauge pressure), keep this vacuum tightness 2min, in polymeric kettle, be filled with nitrogen to pressure 0.4MPa, start melting discharging, and utilize dicing machine (electromagnetic variable speed motor 300 type cantilevereds) granulation, 80 ℃ of dry vacuum-drying 8 hours.
Pulverize: polyamide particles is immersed in-196 ℃ of liquid nitrogen, be added to and in pulley pulverizer, carry out freezing and pulverizing, under air-tight state, treat that hot melt adhesive rises to room temperature, add 0.1% calcium stearate, 0.1% Resorcinol and 0.3% aerosil, through vibratory screening apparatus, by the large small packages of different grain size, obtain polyamide hot finished product again.Fusing point and performance test results are shown in table 1.
embodiment 5
Polymerization: by SL-AH 3.0kg, DC18 4.1kg, pentamethylene diamine 2.6kg, hexanolactam 14kg, Nylon-1010 Salt 6kg and hexanodioic acid 0.3kg, inferior sodium phosphate 30g, polyethylene wax 60g is fed in 100 liters of polymeric kettles (K/SY166-2007 type), vacuumize and inflated with nitrogen 3 times, air in displacement still, oil bath temperature progressively rises to 260～265 ℃, when still internal pressure rises to 1.4MPa, slowly open blow-off valve on still, make pressure keep 1.4MPa, when temperature in the kettle reaches 240 ℃, slowly drive large blow-off valve, make still internal pressure from 1.4MPa, evenly be down to normal pressure in 2 hours, maintain normal pressure after 1 hour, be evacuated to-0.05MPa(gauge pressure), keep this vacuum tightness 2min, in polymeric kettle, be filled with nitrogen to pressure 0.3MPa, start melting discharging, and utilize dicing machine (electromagnetic variable speed motor 300 type cantilevereds) granulation, 80 ℃ of dry vacuum-drying 8 hours.
Pulverize: polyamide hot is dropped into autoclave, add propyl carbinol, polyamide hot is dissolved in propyl carbinol, then through cooling, precipitating, obtain polyamide hot-melt adhesive powder end, finally by the conventional washing of distilled water, softening water or deionized water, oven dry, add 0.2% calcium stearate, 0.1% Resorcinol and 0.3% aerosil to sieve, obtain polyamide hot finished product.Fusing point and performance test results are shown in table 1.
embodiment 6
Polymerization: by tridecanyldicarboxylic acid 9.3kg, pentamethylene diamine 4.2kg, hexanolactam 9.0kg, Nylon-1010 Salt 6.9kg and lauric acid acid 0.45kg, inferior sodium phosphate 30g, polyethylene wax 60g is fed in 100 liters of polymeric kettles (K/SY166-2007 type), vacuumize and inflated with nitrogen 3 times, air in displacement still, oil bath temperature progressively rises to 280～285 ℃, when still internal pressure rises to 1.7MPa, slowly open blow-off valve on still, make pressure keep 1.7MPa, when temperature in the kettle reaches 245 ℃, slowly drive large blow-off valve, make still internal pressure from 1.7MPa, evenly be down to normal pressure in 2 hours, maintain normal pressure after 1 hour, be evacuated to-0.05MPa(gauge pressure), keep this vacuum tightness 2min, in polymeric kettle, be filled with nitrogen to pressure 0.3MPa, start melting discharging, and utilize dicing machine (electromagnetic variable speed motor 300 type cantilevereds) granulation, 80 ℃ of dry vacuum-drying 8 hours.
Pulverize: polyamide hot is dropped into autoclave, add ethylene glycol, polyamide hot is dissolved in ethylene glycol, then through cooling, precipitating, obtain polyamide hot-melt adhesive powder end, finally by the conventional washing of distilled water, softening water or deionized water, oven dry, add 0.1% calcium stearate, 0.1% Resorcinol and 0.3% aerosil to sieve, obtain polyamide hot finished product.Fusing point and performance test results are shown in table 1.
The fusing point of table 1, polyamide hot and performance table
The prepared polyamide hot bonding strength of the present invention is high, and chemical-resistant is good, is applicable to the bonding field of fabric, can be used for coat and binds lining, clothing leather bonding lining, shoes and hats and decorate and bind lining (as carpet, wall paper etc.).Snappiness is good, is applicable to shoemaking and stretches tight shoe last or hat block as paracone and flank, edging and shoemaking attendant of a stage actor head; To the good bonding of leather, leatheroid, make it can be used for the manufacture of case and bag.Also can be applicable to the industry such as electrical equipment, mechanical industry, metal, the manufacture of plastic lamination matrix material, automobile, civil construction and furniture.
Above embodiment is the explanation to technical scheme just, does not form the restriction to technical solution of the present invention.Those skilled in the art is according to the knowledge of existing nylon Preparation Method, can be by adjusting the proportioning raw materials in preparation process, and the temperature of preparation process, pressure etc., realize the nylon of different viscosity numbers.
Although represented and aspects more of the present invention be discussed, but those skilled in the art are to be appreciated that, therefore can under the condition that does not deviate from the principle of the invention and spirit, aspect above-mentioned, change, scope of the present invention will be limited by claim and the content that is equal to.
Claims (8)
1. a polyamide hot, is characterized in that, the raw material of following parts by weight, consists of:
In described diamine, comprise pentamethylene diamine,
Described polyamide hot is prepared by following steps:
Polymerization: polyamide hot raw material is dropped into autoclave, vacuumize and inflated with nitrogen, polymerization temperature is 180～290 ℃, starts pressurize exhaust when pressure reaches 1.0～1.8MPa, treats that temperature in the kettle reaches 190～250 ℃ of increasing exhaust pressure and is down to normal pressure, continue reaction 0.5～2 hour, being evacuated to gauge pressure is-0.01～-0.1MPa, keeps this vacuum tightness 2～60min, adds part of auxiliary, in reaction vessel, be filled with nitrogen to pressure 0.1～0.8MPa, start wire drawing, granulation;
Pulverize: add alcoholic solvent to dissolve polyamide hot particle, then precipitating obtains polyamide hot-melt adhesive powder end, through washing, oven dry, polyamide hot then sieves to obtain; Or
After polyamide hot particle is dried, drop into deep cooling crush machine, by cooled with liquid nitrogen, carry out deep cooling crush, under air-tight state, the polyamide hot-melt adhesive powder end after pulverizing is risen to room temperature, polyamide hot then sieves to obtain.
2. polyamide hot according to claim 1, is characterized in that, has at least a kind of by Biological preparation in described aliphatic dibasic acid and described diamine.
3. polyamide hot according to claim 2, it is characterized in that, the organic carbon that described aliphatic dibasic acid comprises the renewable source that meets ASTM D6866 standard is or/and the organic carbon that described diamine comprises the renewable source that meets ASTM D6866 standard.
4. according to the polyamide hot described in any one in claim 1-3, it is characterized in that, described aliphatic dibasic acid is selected from succinic acid, pentanedioic acid, hexanodioic acid, pimelic acid, suberic acid, nonane diacid, sebacic acid, DC11, SL-AH, tridecanyldicarboxylic acid, DC14,15 carbon dicarboxylic acids, 16-dicarboxylic acid, DC17, DC18, toxilic acid, Δ
9-1,18 octadecylene diprotic acid, soya fatty acid, ready denier oil acid or oleic acid; Described diamine is selected from quadrol, butanediamine, pentamethylene diamine, hexanediamine, heptamethylene diamine, octamethylenediamine, nonamethylene diamine, decamethylene diamine, diethylenetriamine, 2 methyl pentamethylenediamine, triethylene-tetramine, alkanolamine, 11 carbon diamines, 12 carbon diamines, 13 carbon diamines, 14 carbon diamines, 15 carbon diamines, 16 carbon diamines, 17 carbon diamines, 18 carbon diamines, polyoxypropylene diamine, O-Phenylene Diamine, mphenylenediamine, Ursol D, xylylene diamines.
5. polyamide hot according to claim 4, is characterized in that, the described aliphatic dibasic acid diacid of selecting oneself, sebacic acid.
6. polyamide hot according to claim 1, is characterized in that, described nylon salt is selected from nylon 56 salt, nylon salt, nylon 510 salt, NYLON610 salt, nylon 512 salt, nylon 612 salt, Nylon-1010 Salt, Nylon 1012 salt, nylon 1212 salt; Described amino acid is selected from 8-aminocaprylic acid, the amino undecanoic acid of 11-, 12 amino dodecanoic acid; Described lactan is selected from ε-caprolactam, 8-spicy inner formyl amine or ω-lauryl lactam.
7. the preparation method of polyamide hot according to claim 1, is characterized in that, comprises the following steps:
Polymerization: polyamide hot raw material is dropped into autoclave, vacuumize and inflated with nitrogen, polymerization temperature is 180～290 ℃, starts pressurize exhaust when pressure reaches 1.0～1.8MPa, treats that temperature in the kettle reaches 190～250 ℃ of increasing exhaust pressure and is down to normal pressure, continue reaction 0.5～2 hour, being evacuated to gauge pressure is-0.01～-0.1MPa, keeps this vacuum tightness 2～60min, adds part of auxiliary, in reaction vessel, be filled with nitrogen to pressure 0.1～0.8MPa, start wire drawing, granulation;
Pulverize: add alcoholic solvent to dissolve polyamide hot particle, then precipitating obtains polyamide hot-melt adhesive powder end, through washing, oven dry, polyamide hot then sieves to obtain; Or
After polyamide hot particle is dried, drop into deep cooling crush machine, by cooled with liquid nitrogen, carry out deep cooling crush, under air-tight state, the polyamide hot-melt adhesive powder end after pulverizing is risen to room temperature, polyamide hot then sieves to obtain.
8. the preparation method of polyamide hot according to claim 7, is characterized in that, described in also add respectively calcium stearate, Resorcinol and the aerosil of 0.1-0.3% parts by weight before sieving.
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| CN103524731A (en) * | 2013-10-16 | 2014-01-22 | 上海天洋热熔胶有限公司 | Preparation method of polyamide hot melt adhesive with low surface energy for hot drills |
| CN104499075B (en) * | 2014-10-30 | 2016-09-28 | 杭州帝凯工业布有限公司 | High viscous low rheology polyhexamethylene adipamide special fibre and production method thereof |
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