CN109705342A - A kind of color inhibition polyamide and its raw materials for production and production method - Google Patents
A kind of color inhibition polyamide and its raw materials for production and production method Download PDFInfo
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Abstract
The invention belongs to resins synthesis preparation fields, and in particular to a kind of color inhibition polyamide and its raw materials for production and production method.The production method of the color inhibition polyamide includes: that binary acid and diamine are carried out amidation process by (1) under the effect of the catalyst, is later granulated gained polyamide to obtain polyamide particle；(2) polyamide particle and monofunctional isocyanates are stirred to react in 10-120 DEG C 2-10h in the presence of an organic, are filtered, drying obtains color inhibition polyamide.Polyamide is produced using method of the invention, polyamide particle is swollen in organic solvent, strand is in close to the state moveing freely, monofunctional isocyanates enter inside polyamide particle with organic solvent carries out end capping reaction to polyamide molecule chain end, and end capping reaction carries out at a lower temperature, side reaction is very faint, so that finally obtained polyamide be made to have good yellowing resistance.
Description
Technical field
The invention belongs to resins synthesis fields, and in particular to a kind of color inhibition polyamide and its raw materials for production and production
Method.
Background technique
The existing very long history of the development of plastics, but wherein engineering plastics development is slower.It ranks first in engineering plastics
Polyamide is just succeeded in developing in nineteen thirty-nine and realizes industrialization.Polyamide is commonly called as nylon (Nylon), English name Polyamide,
It is the general name of the high polymer in macromolecular main chain repetitive unit containing amide group.Polyamide can be by interior acid amide ring-opening polymerisation system
, it can also be obtained by the polycondensations such as diamine and binary acid.Polyamide it is various in style, have PA6, PA66, PA11, PA12, PA46,
PA610, PA612, PAl010 etc., and semi-aromatic nylon PA6T, PA9T, PA10T for developing in recent years and extraordinary nylon etc.
New varieties.Polyamide has excellent mechanical property, and high mechanical strength, good toughness, self-lubricity and rub resistance are good, has excellent
Heat resistance, high crystalline, polyamide heat distortion temperature is very high, can be used for a long time at 150 DEG C, additionally have excellent electricity
Gas performance and weatherability, therefore the neck such as be widely used in machinery, automobile, electric appliance, textile equipment, chemical industry equipment, aviation, metallurgy
Domain.
However, polyamide product is exposed in room temperature or the higher atmospheric environment of temperature, it is easy shade, become fragile, under performance
Drop.This phenomenon significantly impacts nylon product in the application of certain occasions, when being used as LED support such as semi-aromatic nylon, due to
LED light can release heat under luminescent condition, as the semi-aromatic nylon of LED support and reflector in long term high temperature condition
Under be easy to oxidation turn yellow, influence the reflection efficiency of LED lamplight and the brightness of lamp, or even influence the service life of product.
In addition, due to electronics, electric appliance, the miniaturization of information association equipment, the requirement of high performance, requirement to material into
One step improves.Especially the development of surface mounting technology (Surface Mount Technology, abbreviation SMT), connector are opened
The various electric elements such as pass, relay, capacitor are installed, are connected in the circuit board simultaneously, are promoted electronic component and are minimized, is close
Collectionization, project cost reduce 20-30% than pervious product.But using SMT technology, each electric elements and circuit base plate
It to be heated in infrared heating device simultaneously.To reduce environmental pollution, now advocates energetically and use lead-free scolding tin.It is adopted before
Traditional scolding tin is lead-soldering tin, and fusing point is 183 DEG C；And used novel scolding tin is tin-copper-silver soldering tin now,
Fusing point is 215 DEG C, and more traditional scolding tin improves 30 DEG C.Polyamide product is easy to that side reaction change occurs at such high temperatures
Product colour has color difference before and after Huang, i.e. SMT, and extreme influence has arrived product appearance and quality, it is difficult to meet the use of high-end customer
It is required that.
Summary of the invention
The present invention is intended to provide a kind of color inhibition polyamide and its raw materials for production and production method.
The present inventor has found that end has remained more when due to polymerizing polyamide completion after further investigation
Carboxyl end group and Amino End Group, especially Amino End Group at high temperature be easy with polyamide molecule chain in amido bond cross-linking reaction, this
Sample just results in color of resin flavescence, and polyamide is blocked with monofunctional isocyanates in organic solvent, can
Reduce polyamide in carboxyl end group and terminal amino group content, thus make gained polyamide at high temperature, in following process
It is obviously improved with yellowing resistance in injection moulding process, is particularly suitable for the stabilization of SMT process product color and as LED support
The holding of used time long-term whiteness.Based on this, the present invention is completed.
Specifically, the present invention provides a kind of raw materials for production of color inhibition polyamide, wherein in the raw materials for production
Contain binary acid 20-80 parts by weight, diamine 20-80 parts by weight, catalyst 0.01-0.06 parts by weight and simple function group isocyanide
Acid esters；The monofunctional isocyanates and the polyamide that is obtained through amidation process by the binary acid and diamine
Mass ratio is 1:(100-10000).
Preferably, binary acid 30-60 parts by weight, diamine 30-60 parts by weight, catalyst are contained in the raw materials for production
0.02-0.05 parts by weight and monofunctional isocyanates；The monofunctional isocyanates with by the binary acid and binary
The mass ratio for the polyamide that amine is obtained through amidation process is 1:(100-5000).
Preferably, the binary acid is (0-3) by mass ratio: 1 aromatic acid and aliphatic dibasic acid forms.
Preferably, the aromatic acid is selected from terephthalic acid (TPA), M-phthalic acid, phthalic acid and naphthalenedicarboxylic acid
At least one of, most preferably terephthalic acid (TPA) and/or M-phthalic acid.
Preferably, the aliphatic dibasic acid be selected from succinic acid, glutaric acid, 2- methylglutaric acid, adipic acid, decanedioic acid,
At least one of heneicosanedioic acid, dodecanedioic acid and tridecandioic acid, most preferably adipic acid and/or decanedioic acid.
Preferably, the aliphatic diamine be selected from butanediamine, pentanediamine, 2 methyl pentamethylenediamine, hexamethylene diamine, nonamethylene diamine,
At least one of decamethylene diamine, hendecane diamines, dodecamethylene diamine and tridecane diamine, most preferably hexamethylene diamine and/or the last of the ten Heavenly stems two
Amine.
Preferably, the catalyst be selected from sodium phosphate, magnesium phosphate, calcium phosphate, sodium phosphite, phosphorous acid magnesium, Arizona bacilli,
At least one of zinc phosphite, sodium hypophosphite, ortho phosphorous acid magnesium, Lime Hypophosphate and ortho phosphorous acid zinc, it is most preferably sub-
Sodium phosphate and/or sodium hypophosphite.
Preferably, the monofunctional isocyanates are selected from that the third isocyanates, fourth isocyanates, penta isocyanates, oneself is different
Cyanate, pungent isocyanates, last of the ten Heavenly stems isocyanates, phenylisocyanate, to toluene diisocyanate, toluene diisocyanate and adjacent toluene
At least one of isocyanates.
The production method of color inhibition polyamide provided by the invention using the above raw materials for production and the following steps are included:
(1) binary acid and diamine are carried out to amidation process under the effect of the catalyst and obtain polyamide,
The polyamide is granulated later to obtain polyamide particle；
(2) the polyamide particle and monofunctional isocyanates are stirred in 10-120 DEG C in the presence of an organic
Reaction 2-10h is mixed, is filtered, drying obtains color inhibition polyamide.
A preferred embodiment of the invention, amidation process described in step (1) and the process of granulation include:
S1, the binary acid, diamine, catalyst and water are added in autoclave, autoclave is taken out true
Empty, inflated with nitrogen makes to keep micro-positive pressure in the autoclave later to remove remaining air in reaction kettle；
S2, under agitation, makes the material in the autoclave react 1-3h at 60-150 DEG C, heats up later
To 180-250 DEG C, after pressure reaches 1-5MPa, temperature continues to increase the water steaming for starting simultaneously at and discharging in the autoclave
Gas is to be at pressure constant state, when temperature is increased to 220-340 DEG C, makes the slow pressure release of the autoclave to normal pressure；
S3, it is filled with nitrogen into the autoclave to pressure 0.2-2.5MPa, resulting material is squeezed out from die head and is drawn
Pelletizing, obtains polyamide particle.
In the present invention, the pressure refers both to gauge pressure.
Preferably, relative to the binary acid of 20-80 parts by weight, the dosage of water is 30-160 parts by weight in step S1,
More preferably 40-150 parts by weight.
Preferably, organic solvent described in step (2) and the mass ratio of monofunctional isocyanates are (10-100): 1, more
Preferably (20-50): 1.
The organic solvent is the organic solvent to polyamide with certain solubility (solubility is greater than 1g), preferably
Selected from N,N-dimethylformamide, N-Methyl pyrrolidone, phenol, metacresol, o-cresol, toluene, dimethylbenzene, methylene chloride,
At least one of chloroform, carbon tetrachloride and 1,2- dichloroethanes.
Preferably, the mode of the drying is 8-16 hours dry at 50-100 DEG C in vacuum drying oven.
A kind of specific embodiment according to the present invention, the production method of the color inhibition polyamide include following step
It is rapid:
S1, the binary acid, diamine, catalyst and water are added in autoclave, autoclave is taken out true
Empty, inflated with nitrogen makes to keep micro-positive pressure (10- in the autoclave later to remove remaining air in reaction kettle
50kPa)；
S2, at stirring condition (30-300r/min), react the material in the autoclave at 60-150 DEG C
1-3h is warming up to 180-250 DEG C later, and after pressure reaches 1-5MPa, temperature, which continues to increase, starts simultaneously at the release high pressure
Vapor in reaction kettle is to be at pressure constant state, when temperature is increased to 220-340 DEG C, keeps the autoclave slow
Slowly (0.5-2h) pressure release is to normal pressure；
S3, it is filled with nitrogen into the autoclave to pressure 0.2-2.5MPa, resulting material is squeezed out from die head and is drawn
Pelletizing, obtains polyamide particle；
S4, after monofunctional isocyanates are dissolved in organic solvent, the polyamide particle, Zhi Houyu is added
10-120 DEG C is stirred to react 2-10h, Buchner funnel vacuumizing filtration, in vacuum drying oven at 50-100 DEG C dry 8-16h, obtain
Color inhibition polyamide.
The present invention also provides by color inhibition polyamide obtained by the above method.
In the production process of color inhibition polyamide provided by the invention, aggregated polyamide is in organic solvent
Middle to be blocked with monofunctional isocyanates, polyamide is swollen in organic solvent, strand is in close to moveing freely
State, monofunctional isocyanates enter inside polyamide particle with organic solvent and pass through with the end of polyamide molecule chain
It crosses and sufficiently reacts for a long time, ending ratio significantly improves, so that final products carboxyl end group and terminal amino group content are extremely low, end capping reaction exists
It is carried out at lower temperature, the side reaction of capping process is very faint, so that it is good to have finally obtained polyamide
Yellowing resistance.In addition, being conducive to energy saving, energy saving subtract using method provided by the invention production color inhibition polyamide
Row reduces production cost, improves safety in production coefficient.
Specific embodiment
The embodiment of the present invention is described below in detail, the examples of the embodiments are intended to be used to explain the present invention, and cannot
It is interpreted as limitation of the present invention.In the examples where no specific technique or condition is specified, described according to the literature in the art
Technology or conditions or carried out according to product description.Reagents or instruments used without specified manufacturer is that can lead to
Cross the conventional products of commercially available acquisition.
In following embodiment and comparative example:
(1) terminal amino group content is tested: being titrated polyamide terminal amino group content with autopotentiometric titrator, is taken 0.5g poly-
It closes object plus phenol 45ml is heated to reflux, be cooled to room temperature after sample is completely dissolved, titrated with calibrated hydrochloric acid standard solution
Terminal amino group content.
(2) content of carboxyl end group is tested: being titrated polyamide content of carboxyl end group with autopotentiometric titrator, is taken 0.5g poly-
It closes object plus o-cresol 50ml is heated to reflux, be cooled to room temperature after sample is completely dissolved, dripped with calibrated KOH- ethanol solution
Fixed end carboxyl-content.
(3) color inhibition is tested: polyamide to be tested dry 2h in 180 DEG C of convection oven will be needed, it is then sharp
B value is tested with yellowness index color difference meter, the b value the low, illustrates that anti-yellowing property is better, on the contrary then poorer.
Embodiment 1
S1,1461.4g adipic acid, 1138.9g hexamethylene diamine, 1g catalyst sodium hypophosphite, 1600g deionized water are weighed add
Enter into autoclave, is vacuumized in autoclave, inflated with nitrogen, in triplicate to remove remaining air in reaction kettle,
Autoclave retains micro-positive pressure 25kPa after the completion of displacement；
S2, under 100r/min stirring condition, autoclave is heated to 80 DEG C, isothermal reaction 1.5h, later
220 DEG C are continuously heating to, after pressure reaches 2.0MPa, temperature, which continues to increase, to be started simultaneously at through water in release autoclave
The method of steam makes in pressure constant state in the autoclave, when being warming up to 275 DEG C, in 1.5h slowly by autoclave
Pressure release is to normal pressure；
S3, it is filled with nitrogen to autoclave to pressure 0.8MPa, material is squeezed out into tie rod pelletizing from die head, obtains PA66
Polyamide particle.
S4, toluene diisocyanate between 5g is dissolved in 200ml n,N dimethylformamide, the PA66 that preparation is added later is poly-
Amide resin particle (mass ratio of toluene diisocyanate and PA66 polyamide particle is 1:450), is warming up to 90 DEG C and stirs
5h, Buchner funnel vacuumizing filtration are mixed, 80 DEG C of vacuum drying oven dry 10h obtain color inhibition PA66 polyamide, and performance is surveyed
Test result is as shown in table 1.
Comparative example 1
Polyamide is prepared according to the method for embodiment 1, unlike, it does not include toluene diisocyanate progress between using
The step of sealing end, detailed process is as follows:
S1,1461.4g adipic acid, 1138.9g hexamethylene diamine, 1g catalyst sodium hypophosphite, 1600g deionized water are weighed add
Enter into autoclave, is vacuumized in autoclave, inflated with nitrogen, in triplicate to remove remaining air in reaction kettle,
Autoclave retains micro-positive pressure 25kPa after the completion of displacement；
S2, under 100r/min stirring condition, autoclave is heated to 80 DEG C, isothermal reaction 1.5h, later
220 DEG C are continuously heating to, after pressure reaches 2.0MPa, temperature, which continues to increase, to be started simultaneously at through water in release autoclave
The method of steam makes in pressure constant state in the autoclave, when being warming up to 275 DEG C, in 1.5h slowly by autoclave
Pressure release is to normal pressure；
S3, it is filled with nitrogen to autoclave to pressure 0.8MPa, material is squeezed out into tie rod pelletizing from die head, obtains PA66
Polyamide particle.
S4, by the PA66 polyamide particle of preparation in 80 DEG C of vacuum drying oven dry 10h, obtain PA66 polyamide resin
Rouge, the performance test results are as shown in table 1.
Embodiment 2
S1,913.7g terephthalic acid (TPA), 657.6g adipic acid, 1138.9g hexamethylene diamine, 1g catalyst ortho phosphorous acid are weighed
Sodium, 1600g deionized water are added in autoclave, are vacuumized in autoclave, inflated with nitrogen, anti-to remove in triplicate
Remaining air in kettle is answered, autoclave retains micro-positive pressure 25kPa after the completion of displacement；
S2, under 100r/min stirring condition, autoclave is heated to 100 DEG C, isothermal reaction 1.5h, later
235 DEG C are continuously heating to, after pressure reaches 2.5MPa, temperature, which continues to increase, to be started simultaneously at through water in release autoclave
The method of steam makes that when being warming up to 315 DEG C, autoclave is slowly let out in 1h in pressure constant state in the autoclave
It is depressed into normal pressure；
S3, it is filled with nitrogen to autoclave to pressure 0.8MPa, material is squeezed out into tie rod pelletizing from die head, is obtained
PA6T/66 polyamide particle.
S4,5g isophthalic first isocyanates is dissolved in 200ml n,N dimethylformamide, the PA6T/ of preparation is added later
66 polyamide particles (mass ratio of toluene diisocyanate and PA6T/66 polyamide particle is 1:471), are warming up to
120 DEG C of stirring 2h, Buchner funnel vacuumizing filtration, 100 DEG C of vacuum drying oven dry 8h obtain color inhibition PA6T/66 polyamide resin
Rouge, the performance test results are as shown in table 1.
Embodiment 3
S1,1661.3g terephthalic acid (TPA), 1688.6g decamethylene diamine, 1.6g catalyst sodium phosphite, 5000g deionization are weighed
Water is added in autoclave, is vacuumized in autoclave, inflated with nitrogen, in triplicate to remove remaining sky in reaction kettle
Gas, autoclave retains micro-positive pressure 50kPa after the completion of displacement；
S2, under 300r/min stirring condition, autoclave is heated to 150 DEG C, isothermal reaction 2h, it is subsequent
Continuous to be warming up to 250 DEG C, after pressure reaches 5MPa, temperature, which continues to increase, to be started simultaneously at through vapor in release autoclave
Method make in the autoclave in pressure constant state, when being warming up to 320 DEG C, the slow pressure release in 0.5h by autoclave
To normal pressure；
S3, it is filled with nitrogen to autoclave to pressure 2.5MPa, material is squeezed out into tie rod pelletizing from die head, is obtained
PA10T polyamide particle.
S4,28g last of the ten Heavenly stems isocyanates is dissolved in 280ml metacresol, the PA10T polyamide particle of preparation is added later
(mass ratio of last of the ten Heavenly stems isocyanates and PA10T polyamide particle is 1:107), is warming up to 20 DEG C of stirring 10h, Buchner funnel is taken out
Vacuum filter, 50 DEG C of vacuum drying oven dry 16h obtain color inhibition PA10T polyamide, the performance test results such as 1 institute of table
Show.
Embodiment 4
S1,1162.9g terephthalic acid (TPA), 498.4g M-phthalic acid, 1138.9g hexamethylene diamine, 0.5g catalyst phosphorus are weighed
Sour calcium, 1000g deionized water are added in autoclave, are vacuumized in autoclave, inflated with nitrogen, in triplicate to remove
Remaining air in reaction kettle, autoclave retains micro-positive pressure 10kPa after the completion of displacement；
S2, under 40r/min stirring condition, autoclave is heated to 65 DEG C, isothermal reaction 3h continues later
240 DEG C are warming up to, after pressure reaches 3.4MPa, temperature, which continues to increase, to be started simultaneously at through vapor in release autoclave
Method make in pressure constant state in the autoclave, when being warming up to 330 DEG C, by autoclave, slow pressure release is extremely in 2h
Normal pressure；
S3, it is filled with nitrogen to autoclave to pressure 1.5MPa, material is squeezed out into tie rod pelletizing from die head, is obtained
PA6T/6I polyamide particle.
S4, the third isocyanates of 0.5g is dissolved in 50ml o-cresol, the PA6T/6I polyamide of preparation is added later
Grain (mass ratio of the third isocyanates and PA6T/6I polyamide particle is 1:4895), is warming up to 100 DEG C of stirrings 4h, Bu Shi
Funnel vacuumizing filtration, 70 DEG C of vacuum drying oven dry 12h, obtains color inhibition PA6T/6I polyamide, the performance test results
As shown in table 1.
Embodiment 5
S1,2022.5g decanedioic acid, 1688.6g decamethylene diamine, 0.8g catalyst zinc phosphite, 3000g deionized water are weighed add
Enter into autoclave, is vacuumized in autoclave, inflated with nitrogen, in triplicate to remove remaining air in reaction kettle,
Autoclave retains micro-positive pressure 35kPa after the completion of displacement；
S2, under 200r/min stirring condition, autoclave is heated to 120 DEG C, isothermal reaction 1h, it is subsequent
Continuous to be warming up to 190 DEG C, after pressure reaches 1MPa, temperature, which continues to increase, to be started simultaneously at through vapor in release autoclave
Method make in pressure constant state in the autoclave, when being warming up to 220 DEG C, by autoclave, slow pressure release is extremely in 1h
Normal pressure；
S3, it is filled with nitrogen to autoclave to pressure 1MPa, material is squeezed out into tie rod pelletizing from die head, obtains PA1010
Polyamide particle.
S4, the own isocyanates of 10g is dissolved in 500ml N-Methyl pyrrolidone, the PA1010 polyamides of preparation is added later
Polyimide resin particle (mass ratio of own isocyanates and PA1010 polyamide particle is 1:336), is warming up to 60 DEG C of stirring 8h,
Buchner funnel vacuumizing filtration, 90 DEG C of vacuum drying oven dry 10h, obtains color inhibition PA1010 polyamide, performance test
The results are shown in Table 1.
Table 1
| Title | Embodiment 1 | Comparative example 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Terminal amino group content (mmol/kg) | 26 | 54 | 29 | 18 | 42 | 23 |
| Content of carboxyl end group (mmol/kg) | 35 | 437 | 38 | 27 | 126 | 30 |
| B value | 9 | 28 | 8 | 6 | 19 | 8 |
1 direct polymerization of comparative example obtains PA66 polyamide particle, and by PA66 polyamide after the completion of the polymerization of embodiment 1
Toluene diisocyanate is blocked resin particle between in n,N dimethylformamide, the isocyanates of toluene diisocyanate
Group is reacted with the amido of PA66 molecule chain end and carboxyl generates urea groups and amide group, the active ammonia of molecule chain end
Base and carboxyl be changed into it is stable between phenyl group.The PA66 polyamide of comparative example 1 and embodiment 1 are passed through to the PA66 of sealing end
Polyamide carries out terminal amino group content, content of carboxyl end group and color inhibition test, it can be seen that the PA66 polyamide resin of embodiment 1
Rouge Amino End Group and content of carboxyl end group after sealing end significantly reduce, in color inhibition test after 180 DEG C of bakings, by sealing end
PA66 b value be greatly reduced, anti-yellowing property obviously improves.
It is also known by comparing the production process and test result of remaining each embodiment, terminal amino group content, the end carboxylic of product
Participated in base content and anti-yellowing property and raw material the binary acid polymerizeing, diamine and the content of monofunctional isocyanates,
Type is closely related, and the polyamide particle heat resistance containing aromatic acid preparation improves, matrix anti-yellowing property
Also improve, increase the dosage of monofunctional isocyanates, Amino End Group and the carboxyl end group reaction of polyamide molecule chain end are more complete
Entirely, the anti-yellowing property of product also improves.
The present invention with monofunctional isocyanates by blocking the polyamide of polymerization in organic solvent, polyamide
Resin is swollen in organic solvent, and strand is in close to the state that move freely, with monofunctional isocyanates with having
Solvent enters inside polyamide product, with the amino of polyamide molecule chain end and carboxyl by sufficiently reacting for a long time, makes
It obtains final products ending ratio obviously to get higher, carboxyl end group and terminal amino group content tail off, and polyamide produces in following process, injection moulding process
The Yellowing of product at high temperature is obviously improved.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (10)
1. a kind of raw materials for production of color inhibition polyamide, which is characterized in that contain binary acid 20-80 in the raw materials for production
Parts by weight, diamine 20-80 parts by weight, catalyst 0.01-0.06 parts by weight and monofunctional isocyanates；The simple function
The mass ratio of group's isocyanates and the polyamide obtained by the binary acid and diamine through amidation process is 1:(100-
10000)。
2. the raw materials for production of color inhibition polyamide according to claim 1, which is characterized in that the binary acid is by matter
Amount is than being (0-3): 1 aromatic acid and aliphatic dibasic acid composition.
3. the raw materials for production of color inhibition polyamide according to claim 2, which is characterized in that
The aromatic acid in terephthalic acid (TPA), M-phthalic acid, phthalic acid and naphthalenedicarboxylic acid at least one
Kind, preferably terephthalic acid (TPA) and/or M-phthalic acid；
The aliphatic dibasic acid be selected from succinic acid, glutaric acid, 2- methylglutaric acid, adipic acid, decanedioic acid, heneicosanedioic acid,
At least one of dodecanedioic acid and tridecandioic acid, preferably adipic acid and/or decanedioic acid；
The aliphatic diamine is selected from butanediamine, pentanediamine, 2 methyl pentamethylenediamine, hexamethylene diamine, nonamethylene diamine, decamethylene diamine, 11
At least one of alkane diamines, dodecamethylene diamine and tridecane diamine, preferably hexamethylene diamine and/or decamethylene diamine.
4. the raw materials for production of color inhibition polyamide described in any one of -3 according to claim 1, which is characterized in that institute
It states catalyst and is selected from sodium phosphate, magnesium phosphate, calcium phosphate, sodium phosphite, phosphorous acid magnesium, Arizona bacilli, zinc phosphite, ortho phosphorous acid
At least one of sodium, ortho phosphorous acid magnesium, Lime Hypophosphate and ortho phosphorous acid zinc, preferably sodium phosphite and/or ortho phosphorous acid
Sodium.
5. the raw materials for production of color inhibition polyamide described in any one of -3 according to claim 1, which is characterized in that institute
State monofunctional isocyanates be selected from the third isocyanates, fourth isocyanates, penta isocyanates, own isocyanates, pungent isocyanates,
Last of the ten Heavenly stems isocyanates, phenylisocyanate, at least one in toluene diisocyanate, toluene diisocyanate and adjacent toluene diisocyanate
Kind.
6. a kind of production method of color inhibition polyamide, which is characterized in that this method is using any one in claim 1-5
Described in raw materials for production and the following steps are included:
(1) binary acid and diamine are carried out to amidation process under the effect of the catalyst and obtain polyamide, later
The polyamide is granulated to obtain polyamide particle；
(2) the polyamide particle and monofunctional isocyanates are anti-in 10-120 DEG C of stirring in the presence of an organic
2-10h is answered, is filtered, drying obtains color inhibition polyamide.
7. the production method of color inhibition polyamide according to claim 6, which is characterized in that described in step (1)
Amidation process and the process of granulation include:
S1, the binary acid, diamine, catalyst and water are added in autoclave, autoclave is vacuumized, filled
Nitrogen makes to keep micro-positive pressure in the autoclave later to remove remaining air in reaction kettle；
S2, under agitation, makes the material in the autoclave react 1-3h at 60-150 DEG C, is warming up to later
180-250 DEG C, after pressure reaches 1-5MPa, temperature continues to increase the vapor for starting simultaneously at and discharging in the autoclave
To be at pressure constant state, when temperature is increased to 220-340 DEG C, make the slow pressure release of the autoclave to normal pressure；
S3, it is filled with nitrogen into the autoclave to pressure 0.2-2.5MPa, resulting material is squeezed out into tie rod from die head and is cut
Grain, obtains polyamide particle.
8. the production method of color inhibition polyamide according to claim 7, which is characterized in that relative to 20-80 weight
The binary acid of part is measured, the dosage of water is 30-160 parts by weight in step S1；
Organic solvent described in step (2) and the mass ratio of monofunctional isocyanates are (10-100): 1, preferably (20-
50):1；
The organic solvent be selected from N,N-dimethylformamide, N-Methyl pyrrolidone, phenol, metacresol, o-cresol, toluene,
At least one of dimethylbenzene, methylene chloride, chloroform, carbon tetrachloride and 1,2- dichloroethanes.
9. the production method of the color inhibition polyamide according to any one of claim 6-8, which is characterized in that institute
It is 8-16 hours dry at 50-100 DEG C in vacuum drying oven for stating the mode of drying.
10. the color inhibition polyamide that the method as described in any one of claim 6-9 obtains.
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