CN104558823A - Method for reducing melting point of polypropylene transparent nucleating agent - Google Patents
Method for reducing melting point of polypropylene transparent nucleating agent Download PDFInfo
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- CN104558823A CN104558823A CN201310522506.4A CN201310522506A CN104558823A CN 104558823 A CN104558823 A CN 104558823A CN 201310522506 A CN201310522506 A CN 201310522506A CN 104558823 A CN104558823 A CN 104558823A
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/15—Heterocyclic compounds having oxygen in the ring
- C08K5/156—Heterocyclic compounds having oxygen in the ring having two oxygen atoms in the ring
- C08K5/1575—Six-membered rings
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/24—Crystallisation aids
Abstract
The invention discloses a method for reducing the melting point of a polypropylene transparent nucleating agent. Sorbitol acetal, which is the polypropylene transparent nucleating agent, is washed with a fatty alcohol polyoxyethylene ether sulfate aqueous solution, wherein the weight of fatty alcohol polyoxyethylene ether sulfate contained in the fatty alcohol polyoxyethylene ether sulfate aqueous solution accounts for 0.01-3.0% of the weight of to-be-washed sorbitol acetal. Compared with sorbitol acetal of which the melting point is not reduced, when the sorbitol acetal of which the melting point is reduced by the method, which is disclosed by the invention, is applied in polypropylene, the same application effect can be achieved at a relatively low processing temperature and the obtained polypropylene product is translucent and beautiful.
Description
Technical field
The present invention relates to the technical field of modification of Polypropylene Additive, particularly a kind of method reducing polypropylene transparent nucleater fusing point.
Background technology
The acrylic resin transparency is poor, but add the nucleator of 0.1 ~ 0.3% in polypropylene after, the transparency and glossiness significantly improve, and products appearance improves.Why nucleator has the effect improving polypropylene transparent, because in polyacrylic crystallisation process, nucleator as out-phase nucleus prior to melt polypropylene crystallization, and form homodisperse network, original homogeneous nucleation is made to become heterogeneous nucleation, this network surface is the nucleation centre of out-phase crystallization, thus the nucleus number added in system, make the homogeneous granular of spherocrystal height of generation, form tiny spherocrystal particle, the change of spherulite size makes polypropylene have the good transparency and glossiness.
The nucleator that polypropylene can be made to have the good transparency and glossiness is otherwise known as transparent nucleater or transmission increasing nucleator, the polypropylene being added with transparent nucleater is called as transparent polypropylene, and this transparent polypropylene has been widely used in producing daily packing articles.The transparent nucleater used in polypropylene is a kind of compound being called as sorbitol acetal mainly, by name 1,3:2,4-two (3,4-dimethylbenzylidene) sorbyl alcohol or 1,3:2,4-two (3,4-dimethylbenzylidene) Sorbitol Powder, be also called two (3,4-dimethyl benzal) sorbyl alcohol or two (3,4-dimethyl benzal) Sorbitol Powder, english abbreviation is DMDBS, DMDBS is that 4-dimethylbenzaldehyde forms through condensation reaction by sorbyl alcohol (being also called Sorbitol Powder) and 3.In addition, also the polyacrylic nucleator of another kind using p-tolyl aldehyde and sorbyl alcohol to carry out condensation reaction to obtain is had, this nucleator is called 1,3:2,4-two (to methyl benzylidene) sorbyl alcohol or 1,3:2,4-two (to methyl benzylidene) Sorbitol Powder, also have and be called MDBS or two (to methyl benzal) Sorbitol Powder, to be that MDBS, MDBS are less because of scent of problem used english abbreviation.Above-mentioned nucleator fusing point is high, not easily melting dispersion in polypropylene, even if as also usual more than 265 DEG C containing its fusing point of by product in DMDBS product, and MDBS is also more than 250 DEG C.Therefore, when acrylic resin uses above-mentioned nucleator, require that fines made by nucleator, polyacrylic processing temperature is more than 230 DEG C, otherwise nucleator not easily melting dispersion in polypropylene, result of use declines, the transparency being embodied in goods reduces, and namely mist degree index raises.The injection temperature of plastic working manufacturer production polypropylene articles is generally at 200 ~ 220 DEG C, in order to play the effect of nucleator, often processing temperature will be improved when processing transparent polypropylene, but improving processing temperature not only causes energy consumption to increase, also it is unfavorable to form the quality of goods because no matter at high temperature easily there is degraded in polypropylene or nucleator itself, serious time occur painted or produce smell.
For sorbitol acetal not easily melting scattering problem in resin, there is various proposals, but do not have operability, some ways mix other lower organism of fusing point in sorbitol acetal, make sorbitol acetal under the use temperature lower than himself fusing point, be easy to melting dispersion.Be such as mention tartrate in the international application of WO99/18108 at application number, oxysuccinic acid, citric acid, succsinic acid and other such aliphatic dibasic acids or sodium lauryl sulphate to be incorporated in sorbitol acetal as fusing point depressant thus sorbitol acetal fusing point are reduced, but acid is sorbitol acetal hydrolyst, under sour existence condition, can occur after the sorbitol acetal moisture absorption be hydrolyzed and discharge aromatic aldehyde monomer thus cause scent of problem under polyacrylic processing conditions, this has a strong impact on the quality of such material as polypropylene nucleater, moreover, will mix these relatively large low melting point organism in sorbitol acetal just can make the fusing point of sorbitol acetal significantly reduce, this makes sorbitol acetal be damaged in polyacrylic result of use.Publication number is the composition that the Chinese patent literature of 102675331A discloses a kind of sulfur-bearing acid esters salt and aliphatics monocarboxylic sorbyl alcohol two acetal (comprising sorbitol acetal), and wherein sulfuric acid comprises anion surfactant fatty alcohol polyoxyethylene ether sulfate.This composition, because of sulfuric acid and the monocarboxylic existence of aliphatics, makes sorbyl alcohol two acetal fusing point obviously reduce, sulfuric acid at the weight percent of composition 0.1 ~ 3%.The research that present inventor carries out this discloses, more sulfuric acid is mixed at sorbitol acetal, such as mix the polyoxyethylenated alcohol sodium sulfate that weight is 0.5% of sorbitol acetal, at this moment no matter exist with or without aliphatics monocarboxylic acid, this sorbitol acetal composition is when polypropylene is applied, and the polypropylene articles obtained owes bright, and its aesthetic appearance of goods is deteriorated, with use compared with single, that quantity is identical sorbitol acetal, the transparency of polypropylene articles declines.Publication number is that the Chinese patent of 102675331A then discloses: sorbitol acetal etc. first to dissolve with solvent or swelling by sorbitol acetal and sulfuric acid and the monocarboxylic needs that mix of aliphatics, then mix, by solvent recuperation after mixing, its complicated operation cost is high.
As can be seen here, how prior art is improved, a kind of method reducing polypropylene transparent nucleater fusing point is provided, can effectively reduce polypropylene transparent nucleater fusing point, and the visual appearance of polypropylene articles when being applied in polypropylene, can not be affected, this is the current technical issues that need to address in this area.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of method reducing polypropylene transparent nucleater fusing point, can effectively reduce polypropylene transparent nucleater fusing point, and the visual appearance of polypropylene articles can not be affected when being applied in polypropylene.
For solving above technical problem, technical scheme of the present invention is:
A kind of method reducing polypropylene transparent nucleater fusing point, with fatty alcohol polyoxyethylene ether sulfate solution washing sorbitol acetal, fatty alcohol polyoxyethylene ether sulfate weight contained in the described fatty alcohol polyoxyethylene ether sulfate aqueous solution waits to wash 0.01 ~ 3.0% of sorbitol acetal weight, and described polypropylene transparent nucleater is sorbitol acetal.
Preferably, with fatty alcohol polyoxyethylene ether sulfate solution washing sorbitol acetal finished product.After washing, filtration, drying, can add clear water and rinse sorbitol acetal during filtration.
Preferably, in sorbitol acetal preparation process, with fatty alcohol polyoxyethylene ether sulfate solution washing sorbitol acetal.Particularly, in the water washing operations of sorbitol acetal preparation process, the fatty alcohol polyoxyethylene ether sulfate aqueous solution is added in washing water, then the water washing operations of sorbitol acetal is carried out, also after the water washing operations of sorbitol acetal preparation process terminates, with fatty alcohol polyoxyethylene ether sulfate solution washing sorbitol acetal, then can filter, clear water can be added during filtration and rinse sorbitol acetal, continue thereafter next step operation original.The half-finished mode of another washing sorbitol acetal is: prepare in sorbitol acetal process in use without washing operating procedure, before the drying of sorbitol acetal sorbitol acetal, with fatty alcohol polyoxyethylene ether sulfate solution washing sorbitol acetal, then filtration, drying, can add clear water and rinse sorbitol acetal during filtration.
Preferably, contained in described fatty alcohol polyoxyethylene ether sulfate aqueous solution fatty alcohol polyoxyethylene ether sulfate weight waits to wash 0.03 ~ 2.0% of sorbitol acetal weight.
Preferably, contained in described fatty alcohol polyoxyethylene ether sulfate aqueous solution fatty alcohol polyoxyethylene ether sulfate weight waits to wash 0.05 ~ 0.5% of sorbitol acetal weight.
Preferably, the structure of described sorbitol acetal is:
Or
Preferably, described fatty alcohol polyoxyethylene ether sulfate has following structure:
RO（CH
2CH
2O）n-SO
3M
R is C
8~ C
22alkyl, n=1 ~ 6
M is metal Li, Na, K.
Preferably, by the mode adopted the fatty alcohol polyoxyethylene ether sulfate aqueous solution and sorbitol acetal mix and blend during fatty alcohol polyoxyethylene ether sulfate solution washing sorbitol acetal, churning time is more than 1 minute.
Preferably, with adopting during fatty alcohol polyoxyethylene ether sulfate solution washing sorbitol acetal, the fatty alcohol polyoxyethylene ether sulfate aqueous solution is mixed the mode of soaking with sorbitol acetal, soak time is more than 5 minutes.
Preferably, during with fatty alcohol polyoxyethylene ether sulfate solution washing sorbitol acetal, use shearing dispersion machine or colloidal mill that the fatty alcohol polyoxyethylene ether sulfate aqueous solution is fully mixed with sorbitol acetal.
Compared with prior art, the method of reduction polypropylene transparent nucleater fusing point of the present invention, the fusing point realizing sorbitol acetal in the preparation process of polypropylene transparent nucleater sorbitol acetal reduces, way is to sorbitol acetal finished product or in the preparation process of sorbitol acetal, add the fatty alcohol polyoxyethylene ether sulfate aqueous solution to wash sorbitol acetal, just the fusing point of sorbitol acetal can be reduced, the fatty alcohol polyoxyethylene ether sulfate that the fatty alcohol polyoxyethylene ether sulfate aqueous solution used contains is when being less than 0.1% of sorbitol acetal weight percent, just the fusing point of sorbitol acetal can be reduced by more than 20 DEG C.Method steps of the present invention is simple, with low cost, easy handling, and it is residual not have acidic substance.Compared with the sorbitol acetal not reducing fusing point, reduce the sorbitol acetal after fusing point when polypropylene is applied, can be issued to identical result of use in lower processing temperature, the polypropylene articles obtained is bright, attractive in appearance.
Embodiment
In order to make those skilled in the art understand technical scheme of the present invention better, below by specific embodiment, the present invention is described in further detail.
In the preparation process of sorbitol acetal, sorbitol acetal needs through washing, to reach the object of removing impurity, present inventor finds preparing in sorbitol acetal process: in sorbitol acetal water washing process, with the fatty alcohol polyoxyethylene ether sulfate solution washing sorbitol acetal of lower concentration, the fusing point of sorbitol acetal obviously reduces, and sorbitol acetal is after the process of fatty alcohol polyoxyethylene ether sulfate solution washing, have active effect to polyacrylic transparent modified effect, this change is that prior art institute is unforeseen.And further, the fatty alcohol polyoxyethylene ether sulfate aqueous solution of the finished product lower concentration of sorbitol acetal is washed, the fusing point of sorbitol acetal equally also can be made obviously to reduce.
Basic conception of the present invention is, a kind of method reducing sorbitol acetal compounds polypropylene transparent nucleater fusing point is provided, by with fatty alcohol polyoxyethylene ether sulfate solution washing sorbitol acetal, the fatty alcohol polyoxyethylene ether sulfate that this aqueous solution contains is 0.01 ~ 3.0% of sorbitol acetal weight percent, sorbitol acetal compound fusing point after washing reduces by more than 20 DEG C, without the need to additionally improving polyacrylic processing temperature when sorbitol acetal compound after the fusing point obtained reduces uses in polypropylene, polyacrylic transparent modified effect is not changed, method steps of the present invention is simple, easy to operate, cost is low.
Sorbitol acetal of the present invention is reacted by sorbyl alcohol and tolyl aldehyde and forms, and sorbyl alcohol is also called Sorbitol Powder.Method provided by the invention can be implemented by one of following three kinds of modes.
Mode one: in the water washing operations of sorbitol acetal preparation process, the fatty alcohol polyoxyethylene ether sulfate aqueous solution is added in washing water, then the water washing operations of sorbitol acetal is carried out, also can after the water washing operations of sorbitol acetal preparation process terminates, with fatty alcohol polyoxyethylene ether sulfate solution washing sorbitol acetal, then filter, clear water can be added during filtration and rinse sorbitol acetal, continue thereafter next step operation original.
Mode two: with fatty alcohol polyoxyethylene ether sulfate solution washing finished product sorbitol acetal, then filtration, drying, can add clear water and rinse sorbitol acetal during filtration.
Mode three: prepare in sorbitol acetal process without washing operating procedure in use, before the drying of sorbitol acetal sorbitol acetal, with fatty alcohol polyoxyethylene ether sulfate solution washing sorbitol acetal, then filtration, drying, can add clear water and rinse sorbitol acetal during filtration.
In the above-mentioned methods, the consumption of fatty alcohol polyoxyethylene ether sulfate is 0.01 ~ 3.0% of sorbitol acetal weight percent, preferably 0.05 ~ 0.5%.
In the above-mentioned methods, with in fatty alcohol polyoxyethylene ether sulfate solution washing sorbitol acetal process, can be undertaken by the mode fully stirred, soak.Wherein, when adopting stirring, churning time is no less than 1 minute; When adopting immersion, soak time is no less than 5 minutes.
In the above-mentioned methods, can use mechanical means such as shearing dispersion machine or colloidal mill etc. that the fatty alcohol polyoxyethylene ether sulfate aqueous solution is fully mixed with sorbitol acetal, reach strengthening washing effect.
In the above-mentioned methods, fatty alcohol polyoxyethylene ether sulfate has following structure:
RO（CH
2CH
2O）n-SO
3M
R is C
8~ C
22alkyl, n=1 ~ 6
M is metal Li, Na, K.
In the above-mentioned methods, sorbitol acetal has one of following structure:
Or
In the present invention the fusing point of sorbitol acetal nucleator and the detection method of acrylic resin mist degree as follows:
1, the fusing point (Tm) of nucleator
According to standard GB/T-T19466.3.2004(ISO11357-3:1999) plastics dsc (DSC) Part III: the test of temperature and enthalpy of melting and crystallization, METTLER DSC823e measures.
2, polyacrylic mist degree
According to the mensuration of standard GB/T/T2410-2008 transparent plastics transmittance and mist degree, transmittance/mist degree tester is measured.
Below by way of specific embodiment and comparative example, method of the present invention is specifically described:
Comparative example one
Prepared by sorbitol acetal DMDBS
Is being furnished with heating, stir, nitrogen seals, raw material sorbyl alcohol 18.2 grams is added in the flask of the facilities such as condensation, 3, 4 one dimethylbenzaldehydes 27.3 grams, catalyzer p-methyl benzenesulfonic acid 0.55 gram, solvent hexanaphthene 175 grams, methyl alcohol 30 grams, with air in nitrogen replacement flask 3 minutes, stir, by heating material to 50 ~ 65 DEG C, (steam solvent not reflux after condensation) after having solvent to steam, drip methyl alcohol 75 grams, reaction is terminated after 6 hours, add the water of 200 grams next day, stir, add in proper amount of sodium carbonate and p-methyl benzenesulfonic acid, heating steams solvent, solvent recuperation is terminated when temperature of charge reaches 95 DEG C, add the water of 100 grams, agitator treating product sorbitol acetal DMDBS about 30 minutes, filter, add water during filtration filter wash DMDBS, DMDBS will be leached dry, obtain DMDBS sample.
Embodiment one ~ embodiment four
With polyoxyethylenated alcohol sodium sulfate solution washing work in-process sorbitol acetal DMDBS
Is being furnished with heating, stir, nitrogen seals, raw material sorbyl alcohol 18.2 grams is added in the flask of the facilities such as condensation, 3, 4 one dimethylbenzaldehydes 27.3 grams, catalyzer p-methyl benzenesulfonic acid 0.55 gram, solvent hexanaphthene 175 grams, methyl alcohol 30 grams, with air in nitrogen replacement flask 3 minutes, stir, by heating material to 50 ~ 65 DEG C, (steam solvent not reflux through condensation) after having solvent to steam, drip methyl alcohol 75 grams, reaction is terminated after 6 hours, add the water of 200 grams next day, stir, add in proper amount of sodium carbonate and p-methyl benzenesulfonic acid, heating steams solvent, solvent recuperation is terminated when temperature of charge reaches 95 DEG C, add the water of 100 grams, add a certain amount of polyoxyethylenated alcohol sodium sulfate aqueous solution (polyoxyethylenated alcohol sodium sulfate can be diluted with water to the aqueous solution that concentration is about 5%), agitator treating product sorbitol acetal DMDBS about 30 minutes, filter, add water during filtration filter wash DMDBS, DMDBS will be leached dry, obtain DMDBS sample.Repeat said process, period uses the different polyoxyethylenated alcohol sodium sulfate (concrete consumption is in table 1) measured, and obtains four DMDBS samples through washing altogether.Carry out fusing point measurement to the DMDBS sample of embodiment one ~ embodiment four and the DMDBS sample of comparative example one, measuring result is listed in table 1.
The fusing point of the DMDBS sample that table 1 embodiment one ~ embodiment four and comparative example one obtain
| Embodiment | Polyoxyethylenated alcohol sodium sulfate consumption, % | DMDBS fusing point, DEG C |
| One | 0.5 | 203 |
| Two | 0.1 | 212 |
| Three | 0.05 | 223 |
| Four | 0.03 | 240 |
| Comparative example one | 0 | 266 |
As can be seen from above table 1, compared to the comparative example one of not carrying out fusing point and reduce process, method of the present invention greatly reduces the fusing point of sorbitol acetal DMDBS by simple step, reduces at most 63 DEG C, minimumly reduces 26 DEG C.
Embodiment five ~ embodiment seven
With polyoxyethylenated alcohol sodium sulfate solution washing commodity DMDBS
By weight, get commodity DMDBS1 part, 20 parts, water, a certain amount of polyoxyethylenated alcohol sodium sulfate (concrete consumption is in table 2), after polyoxyethylenated alcohol sodium sulfate is water-soluble, mixes the polyoxyethylenated alcohol sodium sulfate aqueous solution with DMDBS, mixing about 1 minute is stirred with high speed shear dispersion machine, filter, DMDBS sample will be leached and dry, and obtain the DMDBS sample through polyoxyethylenated alcohol sodium sulfate solution washing.
Comparative example two
Wash commodity DMDBS with water
By weight, get commodity DMDBS1 part, 20 parts, water, mixes water with DMDBS, stirs mixing about 1 minute with high speed shear dispersion machine, filters, and will leach DMDBS sample and dry, and obtain the DMDBS sample through water washing.
Comparative example three
Prior art is adopted to carry out the preparation of sorbitol acetal compound
Be dissolved in Virahol by 2 grams of commodity DMDBS, 0.02 gram of polyoxyethylenated alcohol sodium sulfate, 0.05 gram of stearic acid, mixing post-heating steams Virahol, obtains DMDBS, polyoxyethylenated alcohol sodium sulfate, stearic compound sample.
Carry out fusing point measurement to the DMDBS sample of embodiment five ~ embodiment seven, the DMDBS sample of comparative example two, the DMDBS compound sample of comparative example three, measuring result is listed in table 2.
Table 2 embodiment five ~ embodiment seven and comparative example two, three obtain the fusing point of DMDBS sample
| Embodiment | Polyoxyethylenated alcohol sodium sulfate consumption, % | DMDBS fusing point, DEG C |
| Five | 0.1 | 209 |
| Six | 0.07 | 217 |
| Seven | 0.03 | 243 |
| Comparative example two | 0 | 271 |
| Comparative example three | 223 |
Carry out washing the comparative example two processed compared to not adding fatty alcohol-polyoxyethylene ether aqueous sodium persulfate solution, in embodiment five, six, seven, use polyoxyethylenated alcohol sodium sulfate solution washing commodity DMDBS, DMDBS fusing point declines all more than 20 DEG C, and nondiscoloration, identical with the color of comparative example two Central Plains sorbitol acetal; And in comparative example three, the more former sorbitol acetal of sorbitol acetal compound fusing point made by adding additive mode has obvious decline, but compound outward appearance becomes light yellow, and former sorbitol acetal DMDBS is white.
Comparative example four
Prepared by sorbitol acetal MDBS
Replace 27.3 grams 3 with the p-tolyl aldehydes of 24.4 grams, 4-dimethylbenzaldehyde, prepare MDBS sample by comparative example one method.
Embodiment eight ~ embodiment nine
With polyoxyethylenated alcohol sodium sulfate solution washing work in-process sorbitol acetal MDBS
Replace 27.3 grams 3 with the p-tolyl aldehydes of 24.4 grams, 4-dimethylbenzaldehyde, washing MDBS standby by embodiment two, cubic legal system, obtains two MDBS samples through polyoxyethylenated alcohol sodium sulfate solution washing.
Fusing point measurement is carried out to the MDBS sample of embodiment eight ~ embodiment nine, the MDBS sample of comparative example four, the results are shown in table 3.
The fusing point of the MDBS sample that table 3 embodiment eight ~ embodiment nine and comparative example four obtain
| Embodiment | Polyoxyethylenated alcohol sodium sulfate consumption, % | MDBS fusing point, DEG C |
| Eight | 0.1 | 201 |
| Nine | 0.03 | 223 |
| Comparative example four | 0 | 251 |
Relative to comparative example four, in embodiment eight, embodiment nine, MDBS is after polyoxyethylenated alcohol sodium sulfate solution washing, and fusing point decrease beyond 20 DEG C.
Choose embodiment two, four, six, eight and obtained each 2.2 grams of the sorbitol acetal sample of comparative example one, two, four, choose 2.22 grams, comparative example three nucleator compound sample, above-mentioned sample mixes with 1000 grams of polypropylene powders, 1.5 grams of composite antioxidants, 215,0.7 gram of calcium stearate respectively, then the transparent polypropylene sheet sample that thickness is 1.1 millimeters is injection molded into respectively, measure the mist degree of samples of sheets, the results are shown in table 4.
Table 4 sorbitol acetal sample application is evaluated at polyacrylic antireflective effect
| Nucleator is originated | Injection temperature, DEG C | Crystalline p p sheet mist degree, % | Samples of sheets outward appearance |
| Comparative example one | 220 | 17.5 | Owe bright and have small particles |
| Comparative example one | 240 | 13.6 | Bright |
| Embodiment two | 220 | 13.9 | Bright |
| Embodiment four | 220 | 13.5 | Bright |
| Embodiment four | 240 | 13.7 | Bright |
| Comparative example two | 220 | 16.9 | Owe bright and have small particles |
| Comparative example two | 240 | 12.8 | Bright |
| Embodiment six | 220 | 13.2 | Bright |
| Comparative example four | 210 | 18.1 | Owe bright |
| Comparative example four | 230 | 14.2 | Bright |
| Embodiment eight | 210 | 14.0 | Bright |
| Comparative example three | 220 | 15.6 | Relatively owe bright and have mist sense |
As can be seen from the evaluation result of table 4, DMDBS, MDBS have good transparent modified effect to polypropylene under higher injection temperature, after DMDBS, MDBS reduce fusing point with polyoxyethylenated alcohol sodium sulfate solution washing, under lower injection temperature, there is good transparent modified effect equally to polypropylene.
Below be only the preferred embodiment of the present invention, it should be pointed out that above-mentioned preferred implementation should not be considered as limitation of the present invention, protection scope of the present invention should be as the criterion with claim limited range.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. one kind is reduced the method for polypropylene transparent nucleater fusing point, it is characterized in that, with fatty alcohol polyoxyethylene ether sulfate solution washing sorbitol acetal, fatty alcohol polyoxyethylene ether sulfate weight contained in the described fatty alcohol polyoxyethylene ether sulfate aqueous solution waits to wash 0.01 ~ 3.0% of sorbitol acetal weight, and described polypropylene transparent nucleater is sorbitol acetal.
2. the method reducing polypropylene transparent nucleater fusing point as claimed in claim 1, is characterized in that, with fatty alcohol polyoxyethylene ether sulfate solution washing sorbitol acetal finished product.
3. the method reducing polypropylene transparent nucleater fusing point as claimed in claim 1, is characterized in that, in sorbitol acetal preparation process, with fatty alcohol polyoxyethylene ether sulfate solution washing sorbitol acetal.
4. the method reducing polypropylene transparent nucleater fusing point as claimed in claim 1, it is characterized in that, fatty alcohol polyoxyethylene ether sulfate weight contained in the described fatty alcohol polyoxyethylene ether sulfate aqueous solution waits to wash 0.03 ~ 2.0% of sorbitol acetal weight.
5. the method reducing polypropylene transparent nucleater fusing point as claimed in claim 1, it is characterized in that, fatty alcohol polyoxyethylene ether sulfate weight contained in the described fatty alcohol polyoxyethylene ether sulfate aqueous solution waits to wash 0.05 ~ 0.5% of sorbitol acetal weight.
6. the method reducing polypropylene transparent nucleater fusing point as claimed in claim 1, it is characterized in that, the structure of described sorbitol acetal is:
Or
7. the method reducing polypropylene transparent nucleater fusing point as claimed in claim 1, it is characterized in that, described fatty alcohol polyoxyethylene ether sulfate has following structure:
RO（CH
2CH
2O）n-SO
3M
R is C
8~ C
22alkyl, n=1 ~ 6
M is metal Li, Na, K.
8. the method reducing polypropylene transparent nucleater fusing point as claimed in claim 1, it is characterized in that, by the mode adopted the fatty alcohol polyoxyethylene ether sulfate aqueous solution and sorbitol acetal mix and blend during fatty alcohol polyoxyethylene ether sulfate solution washing sorbitol acetal, churning time is more than 1 minute.
9. the method reducing polypropylene transparent nucleater fusing point as claimed in claim 1, it is characterized in that, with adopting during fatty alcohol polyoxyethylene ether sulfate solution washing sorbitol acetal, the fatty alcohol polyoxyethylene ether sulfate aqueous solution is mixed the mode of soaking with sorbitol acetal, soak time is more than 5 minutes.
10. the method reducing polypropylene transparent nucleater fusing point as claimed in claim 1, it is characterized in that, during with fatty alcohol polyoxyethylene ether sulfate solution washing sorbitol acetal, use shearing dispersion machine or colloidal mill that the fatty alcohol polyoxyethylene ether sulfate aqueous solution is fully mixed with sorbitol acetal.
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| CN110357898A (en) * | 2018-04-10 | 2019-10-22 | 广州精至百特利化工科技有限公司 | A method of reducing sorbitol acetal fusing point |
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