CN108084392A - High diathermanous plastic polyurethane of mobile phone protective cover and preparation method thereof - Google Patents
High diathermanous plastic polyurethane of mobile phone protective cover and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6633—Compounds of group C08G18/42
- C08G18/6637—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/664—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4202—Two or more polyesters of different physical or chemical nature
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
- C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4266—Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones
- C08G18/4269—Lactones
- C08G18/4277—Caprolactone and/or substituted caprolactone
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/101—Esters; Ether-esters of monocarboxylic acids
- C08K5/103—Esters; Ether-esters of monocarboxylic acids with polyalcohols
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
- C08K5/134—Phenols containing ester groups
- C08K5/1345—Carboxylic esters of phenolcarboxylic acids
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/06—Polyurethanes from polyesters
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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Abstract
The invention discloses a kind of high diathermanous plastic polyurethane of mobile phone protective cover, including following raw material component：40 70 parts of the polyester diol of molecular weight 1,000 3000,20 45 parts of diisocyanate, 5 25 parts of chain extender, 0.1 1.0 parts of antioxidant, 0.01 0.5 parts of lubricant, 0.2 5 parts of light stabilizer；Further include the catalyst for accounting for other raw material gross weights 0.01 0.1%.The thermoplastic polyurethane material of acquisition, colourless, high transparency, hazing when solved the problems, such as from root as mobile phone protective cover.In addition, by the way that each raw material is injected into from feed inlet and exhaust outlet in double screw extruder respectively in the preparation process of the material, and the material injected from feed inlet also needs the pre-heat treatment respectively Jing Guo different temperatures to reinject, while ensureing that reaction is smoothed out, simple flow as far as possible, with the excellent properties for obtaining material and compared with high efficiency.
Description
Technical field
The present invention relates to thermoplastic polyurethane material's technical field more particularly to the high thermoplastic poly ammonia thoroughly of mobile phone protective cover
Ester, meanwhile, further relate to the preparation method of the material.
Background technology
Mobile phone protective cover to mobile phone in addition to defencive function, also with beautification function and other function affects, such as apple
The protective case of mobile phone because insulation function can avoid phone housing from contacting influence of the interference magnetic field to be formed to mobile phone signal with metal,
To enhance the signal of mobile phone.With the rapid development of mobile phone, the demand of mobile phone protective cover constantly increases, miscellaneous mobile phone protective cover
It comes into being, the material currently used for mobile phone protective cover mainly has silica gel and various plastic materials.The mobile phone protection made by silica gel
It is softer to cover quality, but poor air permeability, for present smart mobile phone because configuring the higher big calorimetric of generation normal in operation, long-time service is past
Toward causing handset heat dissipation performance poor, and silica gel product has slightly viscous, easily adsorbs dust and is attached on mobile phone；By
The mobile phone protective cover that conventional plastic material makes, material is harder, using on mobile phone feel it is poor, and while falling be easily damaged.
Thermoplastic polyurethane (TPU) material because with unique soft and hard segments block copolymer structure, possessing excellent performance,
Such as high-modulus, high intensity, excellent wearability, chemicals-resistant, hydrolytic resistance, high-low temperature resistant and fungus resistance are widely used
In numerous areas, especially injection molding field.Making for mobile phone protective cover can be significantly improved by making mobile phone protective cover using TPU materials
With performance, have broad application prospects.But TPU materials make mobile phone protective cover at present in terms of Se Kou, transparency not to the utmost such as people
Meaning, is present with the problem of hazing, and color is partially yellow in long-time service, intolerant to ultraviolet, so as to influence the aesthetics of mobile phone protective cover and
Service life.For the problem of hazing, cosmetic issue can only be eliminated by using solvent wiping at present, but uses meeting after a period of time
It hazes again, it is impossible to be solved at all.
The content of the invention
To solve the shortcomings of the prior art, the present invention provides a kind of diathermanous plastic polyurethane of mobile phone protective cover height,
The thermoplastic polyurethane material has colourless, the high grade of transparency advantage, and can fundamentally solve and be precipitated by small-molecule substance
The caused problem that hazes significantly optimizes mobile phone protective cover TPU material properties.
To achieve the above object, the present invention provides a kind of high diathermanous plastic polyurethane of mobile phone protective cover, including following heavy
Measure part raw material components：
40-70 parts of the polyester diol of molecular weight 1000-3000；
20-45 parts of diisocyanate；
5-25 parts of chain extender, the chain extender are the dihydric alcohol of molecular weight 40-140；
0.1-1.0 parts of antioxidant, the antioxidant is Hinered phenols, hindered amines, thio esters, phosphorous acid esters antioxygen
At least two in agent；
0.01-0.5 parts of lubricant, the lubricant is stearates, stearic amide class, illiteracy courage wax class, stearic acid
At least two in esters, oleamide class, cyclic butylene terephthalate series lubricant agent；
Steady agent 0.2-5 parts of light, the steady agent of light is hindered amines, benzophenone, in the steady agent of azimidobenzene class light extremely
It is two kinds few；
The catalyst for accounting for other raw material gross weight 0.01-0.1% is further included, the catalyst is organic tin, titanate ester
One kind in catalyst.
The high saturating thermoplastic polyurethane material of mobile phone protective cover of the present invention, from the selection of preparation source, that is, raw material of material and
Consumption proportion optimizes restriction, controls the molecular weight of polyester diol, the molecular weight of species and chain extender, species, and matching is high
Stability lubricant and high activity antioxidant systems.In the building-up process of material, raw material strand in material is upset with chain extender
Put in order, limit polyester molecular weight spent with improving material transparent while, with lubricant stable material small molecular
Substance under the comprehensive function of each raw material, makes reaction obtain colourless, the high grade of transparency TPU materials, the material of acquisition after being plasticized
Material avoids the precipitation of small-molecule substance from root, solves mobile phone protective cover in use because of the stability of its small-molecule substance
With the problem that hazes of TPU materials, the performance of material is significantly improved, and assigns the better aesthetics of mobile phone protective cover, more
Function usability and longer service life.
As the restriction to above-mentioned technical proposal, the polyester diol is polyadipate -1,4-butanediol esterdiol, gathers
At least one of adipic acid -1,4- butanediols-glycol ester glycol, polycaprolactone glycol.
As the restriction to above-mentioned technical proposal, the diisocyanate is 4,4'- methyl diphenylene diisocyanates
(MDI)。
As the restriction to above-mentioned technical proposal, the chain extender is 1,6- hexylene glycols, 1,3-BDO, 1,4-butanediol
At least one of.
As the restriction to above-mentioned technical proposal, the antioxidant is four (β-(3,5- di-tert-butyl-hydroxy phenyl) third
Acid) pentaerythritol ester (antioxidant 1010), 3- (3,5- di-tert-butyl-hydroxy phenyls) propionic acid n-octadecane alcohol ester (antioxidant
1076), 2,6- is to di-tert-butyl p-cresol (antioxidant 264), the two thio double propionate (antioxidant of (dodecyl) -3,3'-
DLTP), three (2,4- di-t-butyls) phenyl-phosphites (irgasfos 168), double (2,4- di-tert-butyl-phenyls) pentaerythrites two are sub-
At least two in phosphate (antioxidant THP-24), three isodecyl fat of phosphorous acid.
As the restriction to above-mentioned technical proposal, the lubricant is zinc stearate, calcium stearate, four hard acid of pentaerythrite
At least two in ester, ethylene bis stearic acid amide, illiteracy courage wax E waxes, oleamide, CBT100, CBT200.
As the restriction to above-mentioned technical proposal, the light stabilizer is double (2,2,6,6- tetramethyl -4- piperidyls) last of the ten Heavenly stems
Two acid esters (HA-10), poly-succinic (4- ethoxy -2,2,6,6- tetramethyl -1- piperidine ethanols) ester (BW-10LD), [[3,5-
Di-tert-butyl-hydroxy phenyl] methyl] butylmalonic acid two (1,2,2,6,6- pentamethyl -4- piperidyls) ester (UV-144), 2-
Hydroxyl -4'- methoxy benzophenones (UV-9), 2-hydroxy-4-n-octoxybenzophenone (UV-531), 2- (2H- benzos three
Azoles -2- bases) in -4,6- two (1- methyl-1s-phenethyl)-phenol (UV234) at least two.
As the restriction to above-mentioned technical proposal, the catalyst is stannous octoate, two sad two fourth tin, tin dilaurate two
One kind in butyl tin, metatitanic acid methyl esters, tetraethyl titanate, titanium propanolate, butyl titanate.
Polyester diol in raw material components, diisocyanate, chain extender, antioxidant, lubricant, light is further limited to stablize
The material of agent and catalyst selects, and preferably improves TPU material properties.
Meanwhile the present invention also provides the preparation method of the high diathermanous plastic polyurethane of mobile phone protective cover as described above, including
Following steps：
A, the mixing and pretreatment of raw material components：
A1, by polyester diol, Hinered phenols, hindered amines, monothioester kind antioxidant, stearic acid esters, cover courage wax class,
Oleamide series lubricant agent is heated to 90-160 DEG C after mixing with catalyst；
A2, diisocyanate is heated to 50-100 DEG C；
A3, chain extender is heated to 40-60 DEG C；
B, will be injected into simultaneously from feed inlet in double screw extruder through the pretreated each materials of step a, by raw material group
The injection flow of distribution ratio and yield control material；By phosphite ester kind antioxidant, stearates, stearic amide class, ring
Shape mutual-phenenyl two acid bromide two alcohol ester's series lubricant agent is injected into double screw extruder with light stabilizer from exhaust outlet, by raw material group
The injection flow of distribution ratio control material；It is reacted at 150-240 DEG C of temperature, treats that the reaction was complete and obtain squeezing out product, then
Through pelletizing, drying, the grain products of the high diathermanous plastic polyurethane of acquisition mobile phone protective cover.
As the restriction to above-mentioned technical proposal, the screw speed of double screw extruder is 160- in reaction described in step b
240rpm。
The saturating thermoplastic polyurethane material of mobile phone protective cover height of the present invention, in preparation process, the mixing of each raw material components and
The pre-heat treatment is of crucial importance for the synthesis of material, and each raw material is divided into two bursts of material flows, is noted respectively from feed inlet and exhaust outlet
Enter into double screw extruder, and the material injected from feed inlet also needs to be divided at preheating of the three classes respectively Jing Guo different temperatures
Reason reinjects, and plastication production TPU materials is finally carried out, to ensure the superiority for being smoothed out and obtaining material of reaction
Energy.
In conclusion technical solution using the present invention, the high saturating thermoplastic polyurethane material of mobile phone protective cover of acquisition, lead to
The molecular weight and species of control polyester diol, the molecular weight and species of chain extender are crossed, and matches high stability lubricant and height
The use of active antioxidant systems under the comprehensive function of each raw material, obtains colourless and has the high grade of transparency by plastication
TPU materials, the material of acquisition avoids the analysis of small-molecule substance from root in use because of the stability of its small-molecule substance
Go out, solve the problems, such as hazing for mobile phone protective cover TPU materials, significantly improve the performance of material, and assign mobile phone protective cover
Better aesthetics, more function usability and longer service life.The thermoplastic polyurethane material of the present invention, passes through
Each raw material is injected into from feed inlet and exhaust outlet in double screw extruder respectively, and the material injected from feed inlet also needs point
The pre-heat treatment not Jing Guo different temperatures reinjects, and finally carries out plastication production TPU materials, is smoothed out ensureing to react
While, simple flow, with the excellent properties for obtaining material and compared with high efficiency, further improves as mobile phone protective cover as far as possible
Performance and use popularity.
Specific embodiment
Below in conjunction with embodiment, technical scheme is clearly and completely described, it is clear that described
Embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field
Those of ordinary skill's all other embodiments obtained without making creative work, belong to protection of the present invention
Scope.
Embodiment one
The present embodiment is related to for the high diathermanous plastic polyurethane of mobile phone protective cover and its preparation.
A kind of high diathermanous plastic polyurethane of mobile phone protective cover, composition of raw materials are：
40-70 parts of the polyester diol of molecular weight 1000-3000；
20-45 parts of diisocyanate；
5-25 parts of chain extender, the chain extender are the dihydric alcohol that molecular weight is 40-140；
0.1-0.5 parts of antioxidant, the antioxidant resist for Hinered phenols, hindered amines, thio esters or phosphorous acid esters
At least two in oxygen agent；
0.01-0.5 parts of lubricant, the lubricant is stearates, stearic amide class, illiteracy courage wax class, stearic acid
At least two in esters, oleamide class, cyclic butylene terephthalate series lubricant agent；
Steady agent 0.2-5 parts of light, the steady agent of light is hindered amines, benzophenone, in the steady agent of azimidobenzene class light extremely
It is two kinds few；
The catalyst for accounting for other raw material gross weight 0.01-0.1% is further included, the catalyst is organic tin, titanate ester
One kind in catalyst.
Its preparation carries out according to the following steps：
A, the mixing and pretreatment of raw material components：
A1, by polyester diol, Hinered phenols, hindered amines, monothioester kind antioxidant, stearic acid esters, cover courage wax class,
Oleamide series lubricant agent is heated to 90-160 DEG C after mixing with catalyst；
A2, diisocyanate is heated to 50-100 DEG C；
A3, chain extender is heated to 40-60 DEG C；
B, will be injected into simultaneously from feed inlet in double screw extruder through the pretreated each materials of step a, by raw material group
The injection flow of distribution ratio and yield control material；By phosphite ester kind antioxidant, stearates, stearic amide class, ring
Shape mutual-phenenyl two acid bromide two alcohol ester's series lubricant agent is injected into double screw extruder with light stabilizer from exhaust outlet, by raw material group
The injection flow of distribution ratio control material；
Screw speed is set as 200 ± 40rpm, temperature be 150-240 DEG C, reaction product from die head extrusion after, through pelletizing,
Drying obtains the grain products of the high diathermanous plastic polyurethane of casting films.
It prepares the high diathermanous plastic polyurethane of mobile phone protective cover of different embodiments as stated above, and is carried out pair with comparative example
Than the material of each embodiment and comparative example is as shown in the table：
Embodiment two
The present embodiment is related to the performance verification of the thermoplastic polyurethane material of the present invention.
The product that embodiment one obtains is machined to the iPhone5 mobile phone protective covers that thickness is 1.5mm via injection, is made
The mist degree and YI of mobile phone protective cover are detected with the serial spectroscopes of x-rite Ci 7600, and the mobile phone protective cover of injection is carried out respectively
100 DEG C of * be tempered for 24 hours and thermostatic chamber place 6 months after, observation spit powder；Other performances are tested by national standard；Testing result is as follows
Shown in table：
Use mobile phone protective cover prepared by the thermoplastic polyurethane material of the present invention and traditional silica gel and plastic handset sheath phase
Than transparency is high, does not haze and spits powder, can play the role of beautiful and protection mobile phone well.
In conclusion the thermoplastic polyurethane material of the present invention, has colourless, the high grade of transparency excellent properties, as hand
Machine sheath material avoids the precipitation of small-molecule substance from root in use, solves hazing for mobile phone protective cover TPU materials
Problem significantly improves the performance of material.
Claims (10)
1. the high diathermanous plastic polyurethane of a kind of mobile phone protective cover, which is characterized in that including following raw material component：
40-70 parts of the polyester diol of molecular weight 1000-3000；
20-45 parts of diisocyanate；
5-25 parts of chain extender, the chain extender are the dihydric alcohol of molecular weight 40-140；
0.1-1.0 parts of antioxidant, the antioxidant is Hinered phenols, in hindered amines, thio esters, phosphite ester kind antioxidant
At least two；
0.01-0.5 parts of lubricant, the lubricant is stearates, stearic amide class, cover courage wax class, stearic acid esters,
At least two in oleamide class, cyclic butylene terephthalate series lubricant agent；
Steady agent 0.2-5 parts of light, the steady agent of light are at least two in hindered amines, benzophenone, the steady agent of azimidobenzene class light
Kind；
The catalyst for accounting for other raw material gross weight 0.01-0.1% is further included, the catalyst is organic tin, titanate ester is catalyzed
One kind in agent.
2. the high diathermanous plastic polyurethane of mobile phone protective cover according to claim 1, it is characterised in that：The polyester diol
For in polyadipate -1,4- butyl glycol ester diols, polyadipate -1,4- butanediols-glycol ester glycol, polycaprolactone glycol
It is at least one.
3. the high diathermanous plastic polyurethane of mobile phone protective cover according to claim 1, it is characterised in that：The diisocyanate
For 4,4'- methyl diphenylene diisocyanates.
4. the high diathermanous plastic polyurethane of mobile phone protective cover according to claim 1, it is characterised in that：The chain extender is 1,
At least one of 6- hexylene glycols, 1,3 butylene glycol, 1,4- butanediols.
5. the high diathermanous plastic polyurethane of mobile phone protective cover according to claim 1, it is characterised in that：The antioxidant is four
(β-(3,5- di-tert-butyl-hydroxy phenyls) propionic acid) pentaerythritol ester, propionic acid is just by 3- (3,5- di-tert-butyl-hydroxy phenyls)
Octadecane alcohol ester, 2,6- are to di-tert-butyl p-cresol, the thio double propionates of two (dodecyl) -3,3'-, three (bis- tertiary fourths of 2,4-
Base) phenyl-phosphite, double (2,4- di-tert-butyl-phenyls) pentaerythritol diphosphites, in three isodecyl fat of phosphorous acid at least
Two kinds.
6. the high diathermanous plastic polyurethane of mobile phone protective cover according to claim 1, it is characterised in that：The lubricant is hard
Resin acid zinc, calcium stearate, pentaerythrite four hard acid ester, ethylene bis stearic acid amide, cover courage wax E waxes, oleamide, CBT100,
At least two in CBT200.
7. the high diathermanous plastic polyurethane of mobile phone protective cover according to claim 1, it is characterised in that：The light stabilizer is
Bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate, poly-succinic (4- ethoxy -2,2,6,6- tetramethyl -1- piperidines second
Alcohol) ester, [[3,5- di-tert-butyl-hydroxy phenyls] methyl] butylmalonic acid two (1,2,2,6,6- pentamethyl -4- piperidyls)
Ester, 2- hydroxyl -4'- methoxy benzophenones, 2-hydroxy-4-n-octoxybenzophenone, 2- (2H- benzotriazole -2- bases) -4,
At least two in 6- bis- (1- methyl-1s-phenethyl)-phenol.
8. the high diathermanous plastic polyurethane of mobile phone protective cover according to claim 1, it is characterised in that：The catalyst is pungent
In sour stannous, two sad two fourth tin, dibutyl tin laurate, metatitanic acid methyl esters, tetraethyl titanate, titanium propanolate, butyl titanate
It is a kind of.
9. a kind of preparation method of the high diathermanous plastic polyurethane of such as mobile phone protective cover described in any item of the claim 1 to 8,
It is characterized in that, comprises the following steps：
A, the mixing and pretreatment of raw material components：
A1, by polyester diol, Hinered phenols, hindered amines, monothioester kind antioxidant, stearic acid esters cover courage wax class, oleic acid
Amide series lubricant agent is heated to 90-160 DEG C after mixing with catalyst；
A2, diisocyanate is heated to 50-100 DEG C；
A3, chain extender is heated to 40-60 DEG C；
B, it will be injected into double screw extruder from feed inlet through the pretreated each materials of step a, match somebody with somebody by raw material components simultaneously
Than the injection flow with yield control material；By phosphite ester kind antioxidant, stearates, stearic amide class, annular are right
Benzene dicarboxylic acid butanediol ester series lubricant agent is injected into double screw extruder from exhaust outlet with light stabilizer, matches somebody with somebody by raw material components
Than the injection flow of control material；It is reacted at 150-240 DEG C of temperature, treats that the reaction was complete and obtain squeezing out product, then through cutting
Grain, drying obtain the grain products of the high diathermanous plastic polyurethane of mobile phone protective cover.
10. the preparation method of the high diathermanous plastic polyurethane of mobile phone protective cover according to claim 9, it is characterised in that：Step
The screw speed of double screw extruder is 160-240rpm in reaction described in rapid b.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711099947.2A CN108084392A (en) | 2017-11-09 | 2017-11-09 | High diathermanous plastic polyurethane of mobile phone protective cover and preparation method thereof |
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| CN109593026A (en) * | 2018-12-13 | 2019-04-09 | 东莞理工学院 | A kind of phenol color inhibition composition and its application |
| CN113272384A (en) * | 2019-01-09 | 2021-08-17 | 艾维恩股份有限公司 | Thermoplastic polyurethane compounds exhibiting improved stain resistance |
| CN115141479A (en) * | 2022-09-01 | 2022-10-04 | 山东一诺威聚氨酯股份有限公司 | Modified TPU for encapsulating PC and preparation method thereof |
| US11697733B2 (en) | 2019-01-09 | 2023-07-11 | Avient Corporation | Thermoplastic polyurethane compounds exhibiting stain resistance and enhanced UV stability |
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