KR101666262B1 - Resin blend - Google Patents

Abstract

The present invention relates to a resin mixture, a pellet, a method for producing a resin molded article using the same, and a resin molded article. The exemplary resin mixture of the present application can provide a resin molded article having excellent processability while having improved mechanical properties and surface hardness.

Description

Resin mixture {RESIN BLEND}

The present invention relates to a resin mixture, a pellet, a method for producing a resin molded article using the same, and a resin molded article.

Plastic resins are easy to process, have excellent properties such as tensile strength, elastic modulus and heat resistance, and are used for various purposes such as automobile parts, helmets, electric device parts, spinning machine parts, toys and pipes.

For example, when a molded product is produced by extruding or extruding a plastic resin, a molded product is prepared by mixing a functional resin into the plastic resin in order to improve mechanical properties and surface hardness of the molded product.

The present application provides resin mixtures and pellets.

One embodiment of the present application relates to a composition comprising a first resin; And a second resin having a constant α value of 0.1 to 0.5 in the Mark-Houwink formula represented by the following general formula (1).

[Formula 1]

[?] = KM ^?

In the above general formula,

? represents the intrinsic viscosity of the second resin,

M represents the molecular weight of the second resin,

K and? Are constants applied when the second resin is dissolved in tetrahydrofuran at 40 占 폚.

Another embodiment of the present application includes a core formed of a first resin; And a cell formed of a second resin having a constant α value of 0.1 to 0.5 in the Mark-Houwink equation represented by the general formula (1).

Another embodiment of the present application is a method for producing a molten mixture comprising: melting the resin mixture to form a molten mixture; And a step of processing the molten mixture.

Another embodiment of the present application is a process for producing a molten mixture comprising: melting the pellet to form a molten mixture; And a method of manufacturing a resin molded article for processing the molten mixture.

Another embodiment of the present application includes a first resin and a second resin, wherein the second resin has a constant α value of the Mark-Houwink formula represented by the general formula 1 of 0.1 to 0.5 A resin molded article is provided.

Hereinafter, a resin mixture, a pellet, a method for producing a resin molded article using the resin mixture, and a resin molded product according to a specific embodiment will be described in detail.

As used herein, a "mixture" may be a mixture of two or more different resins. The type of the mixture is not particularly limited, but may include a case where two or more resins are mixed in one matrix, or a case where two or more kinds of pellets are mixed. The resins may each have different physical properties, for example, the physical properties may be surface energy, melt viscosity or solubility parameter.

"Melt processing" means the process of melting a resin mixture at a temperature above the melting temperature (Tm) to form a melt blend and forming the desired molded article using the melt mixture, Molding, extrusion molding, blow molding, transfer molding, film blowing, fiber spinning, car-rendering thermoforming or foam molding.

The term "resin molded product" means a product or a pellet formed from a resin mixture. The resin molded product is not particularly limited, and examples thereof include automobile parts, electronic device parts, machine parts, functional films, have.

In one example, the resin mixture can be molded by melt processing. Further, the resin mixture can provide excellent processability by increasing the melt viscosity while maintaining different physical properties. Therefore, the resin molded article can have improved mechanical properties and surface characteristics, and when the resin mixture is used, the production cost and time of the resin molded article can be reduced, and excellent workability can be provided.

In the resin mixture, the first resin is a resin which mainly determines the physical properties of a desired molded article, and may be selected according to the type of the desired molded article and the process conditions to be used. As the first resin, a general synthetic resin can be used without any particular limitation.

As the first resin, for example, an acrylonitrile butadiene styrene (ABS) resin, a polystyrene resin, an acrylonitrile styrene acrylate (ASA) resin, an acrylate-acrylonitrile-butadiene-styrene copolymer or a styrene- Styrene type resins such as block copolymers; A polyolefin-based resin such as a high-density polyethylene-based resin, a low-density polyethylene-based resin, or a polypropylene-based resin; A thermoplastic elastomer such as an ester-based thermoplastic elastomer or an olefin-based thermoplastic elastomer; Polyoxyalkylene resins such as polyoxymethylene resins and polyoxyethylene resins; Polyester resins such as polyethylene terephthalate resin or polybutylene terephthalate resin; Polyvinyl chloride resins; Polycarbonate resin; Polyphenylene sulfide type resin; Vinyl alcohol type resin; Polyamide based resin; Acrylate resins; Engineering plastics; Copolymers thereof, and mixtures thereof. As the engineering plastics, plastics exhibiting excellent mechanical and thermal properties can be used. For example, polyether ketone, polysulfone, and polyimide may be used as engineering plastics. In one example, the first resin may be a copolymer obtained by polymerizing acrylonitrile, butadiene, styrene, and acrylic monomers.

In one embodiment, the first resin comprises 3 to 12 parts by weight of acrylonitrile; 5 to 15 parts by weight of butadiene; 15 to 30 parts by weight of styrene; And 50 to 70 parts by weight of a (meth) acrylic monomer.

The second resin in the resin mixture may be a polymer having a constant α value of from 0.1 to 0.5 in the Mark-Houwink formula represented by the following general formula (1).

[Formula 1]

[?] = KM ^?

In the above general formula,

? represents the intrinsic viscosity of the second resin,

M represents the molecular weight of the second resin,

K and? Are constants applied when the second resin is dissolved in tetrahydrofuran at 40 占 폚.

The Mark-Hawking equation is known in the art as providing a relationship between intrinsic viscosity and molecular weight of the polymer. From the above equation, the molecular weight of the polymer can be determined from data on intrinsic viscosity, and vice versa. In the above equation, the values of the parameters K and a depend on the specific polymer-solvent system and can be obtained by using GPC or the like.

In one embodiment, the second resin may be a hyperbranched polymer. More specifically, the hyperbranched polymer may satisfy the following general formula (2) and general formula (3).

[Formula 2]

0.01 V ^L = V ^H = 0.07 V ^L

[Formula 3]

0.9 W ^H = W ^L = 1.1 W ^H

In the above general formulas 2 and 3,

V ^H represents the melt viscosity of the hyperbranched polymer at 220 ° C and 1000 s ^-1 ,

V ^L represents the melt viscosity of a linear polymer polymerized with the same monomer component as the hyperbranched polymer at 220 ° C and 1000 s ^-1 ,

W ^H represents the weight average molecular weight of the hyperbranched polymer,

And W ^L represents the weight average molecular weight of the linear polymer.

Thus, in one embodiment, the hyperbranched polymer has a melt viscosity of 0.01 to 0.7 times, for example 0.05 to 0.5 times, or 0.1 to 0.5 times, as compared to the melt viscosity of a linear polymer polymerized with the same monomer component and having the same similar weight- 0.3 times the melt viscosity. Since the superbranched polymer has a lower melt viscosity than the linear polymer polymerized with the same monomer component, the melt viscosity of the resin mixture can be lowered and excellent workability can be imparted.

The hyperbranched polymer in the present specification is a polymer having at least one hyperbranched structural unit having a branched structure of arbitrary shape. The hyperbranched structural units may be different from each other or may be the same.

Quot; super-branched structure unit " will be described in more detail with reference to the drawings. As shown in FIGS. 1 and 2, the hyperbranched structural units have at least one branch start point 10a. There is no limitation on the number of branch points 10a, 11, 12, 13 possessed by the super-branched structural unit, and it may be a structure in which only the starting point 10a of the branch point is a branch point. In an embodiment, the hyperbranched structural unit may comprise at least a first generation branch point 11,

As an example, the second generation branch point 12 and the third generation branch point 13 may be additionally included. Generation also refers to the order of regular branches. The number of generations is preferably from 1 to 10, and the number of generations is preferably from 2 to 8 because of the compactness and easiness of synthesis of the terminal group (the terminal portion of the hyperbranched structural unit 12, the terminal portion constituting the surface of the hyperbranched polymer 10) More preferably from 3 to 7, and most preferably from 3 to 5.

In an embodiment, the hyperbranched structural unit may have a hyperbranched structural unit having an irregular repeating branch structure as shown in FIG. 1, and may have a dendrimer structural unit having a regular repeating branch structure as shown in FIG. .

The polymer having the hyperbranched structural unit may exist in various forms. It may have a hyperbranched configuration with one or two branching structures from the focusing structure 10 as shown in Figures 1 and 2.

In another embodiment, the hyperbranched polymer may be a star polymer comprising three or more hyperbranched structural units 31 coupled to the core 30 and the core, as shown in Fig. For example, the number of the hyperbranched structural units 31 is three or four. The plurality of hyperbranched structural units (31) may be a hyperbranched structural unit or a dendrimeric structural unit. Further, the plurality of hyperbranched structural units 31 may be different from each other, but may be the same in terms of the symmetry of the structure.

In another embodiment, the hyperbranched polymer comprises a core 40 and a hyperbranched structural unit 41 bonded to the core, as shown in Figure 4, wherein the core 40 is polymerized in the form of a linear polymer Linear polymer.

The core or focal structure 10,30,40 of the hyperbranched polymer is combined with any number of branching starting points 10a and 30a to form the hyperbranched structural units 31 and 41 after the branching start points 10a and 30a Quot;). ≪ / RTI >

The multifunctional atomic group constituting the core or the focal structure may be selected from the group consisting of (1) an unsubstituted or a hydroxyl group having 1 to 20 carbon atoms in which a hetero atom such as O, NH, N (CH ₃ ), S or SO ₂ can intervene, (2) an arylene group having 6 to 20 carbon atoms, (3) a group in which the alkylene group and the arylene group are bonded to each other, (4) an alkylene group having 4 to 20 carbon atoms, ) A multivalent group in which a hydrogen atom bonded to a carbon atom of each of the above groups (1) to (3) is separated, (5) a multivalent heterocyclic group, (6) a multivalent heterocyclic group, And a group bonded with a hydrocarbon group.

In an embodiment, the core structure comprises a derivative of cyclodextrin. The cyclodextrin derivatives include? -CD,? -CD, or? -CD of the following formula (1).

[Chemical Formula 1]

For example, the cyclodextrin itself is difficult to act as a polymerization initiator, and accordingly, in the present application, a derivative of cyclodextrin in which the hydroxy group of the cyclodextrin is substituted with a halogen element such as a bromine atom can be used. In the present specification, the derivative of the cyclodextrin substituted with the hydroxy group is named as "NX-β-CD", wherein N represents the number of substituted hydroxy groups, and X represents a halogen element.

The hyperbranched structural units, i.e., dendron, of the hyperbranched polymer used in the present invention may be aromatic or aliphatic. For example, the hyperbranched structural units can be derived from acrylate monomers.

Examples of the alkyl (meth) acrylate include alkyl having 1 to 40 carbon atoms, alkyl having 1 to 30 carbon atoms, alkyl having 1 to 20 carbon atoms, alkyl having 1 to 10 carbon atoms, Alkyl, alkyl of 1 to 4 carbon atoms, alkyl of 1 to 3 carbon atoms, or alkyl (meth) acrylate of 1 to 2 carbon atoms. For example, the content of the alkyl (meth) acrylate may be in the range of 50 to 97 parts by weight, 60 to 95 parts by weight, 65 to 90 parts by weight, 50 to 80 parts by weight, 50 to 80 parts by weight based on 100 parts by weight of the total monomers contained in the monomer mixture 50 to 70 parts by weight, 55 to 80 parts by weight, 60 to 80 parts by weight, 55 to 75 parts by weight or 60 to 70 parts by weight.

In one example, the monomer mixture for polymerizing the acrylic polymer may further comprise a monomer having a bulky functional group. A linear polymer formed from a monomer mixture comprising monomers having bulky functional groups may increase the hydrodynamic volume to provide a second resin having a lower melt viscosity.

In one example, the monomer having a bulky functional group may be an alkyl (meth) acrylate. The monomer mixture may thus be, for example, an alkyl (meth) acrylate forming the predominant polymerization unit of the acrylic polymer described above; And (meth) acrylates having a bulky alkyl group. Examples of the (meth) acrylate having a bulky alkyl group include a vinyl group having 3 to 20 carbon atoms, 3 to 12 carbon atoms, 3 to 6 carbon atoms, 5 to 20 carbon atoms, 7 to 20 carbon atoms, 10 to 20 carbon atoms, Alkyl (meth) acrylate of 20 to 20 carbon atoms; Or an alicyclic (meth) acrylate having 5 to 40 carbon atoms, 5 to 25 carbon atoms, 5 to 16 carbon atoms, 6 to 40 carbon atoms, 10 to 40 carbon atoms, 12 to 40 carbon atoms or 16 to 40 carbon atoms, And the like. Specific examples of the alkyl (meth) acrylate having 3 to 20 carbon atoms include isopropyl (meth) acrylate, isobutyl (meth) acrylate, tertiary butyl (meth) Examples of the alicyclic (meth) acrylate having 5 to 40 carbon atoms include cyclohexyl (meth) acrylate or isobornyl (meth) acrylate, And the like.

The content of (meth) acrylate having such a bulky alkyl group can be appropriately controlled in accordance with the melt viscosity and purpose of use of the second resin. For example, the content of the (meth) acrylate having a bulky alkyl group may be 3 to 50 parts by weight, 10 to 40 parts by weight, 15 to 40 parts by weight, 20 to 40 parts by weight based on 100 parts by weight of the total monomers contained in the monomer mixture 10 to 35 parts by weight, 10 to 30 parts by weight, 15 to 35 parts by weight or 20 to 30 parts by weight.

In another example, aromatic (meth) acrylate may be used as the monomer having a bulky functional group. Examples of the aromatic (meth) acrylate include aromatic (meth) acrylates having 6 to 40 carbon atoms, 6 to 25 carbon atoms, and 6 to 16 carbon atoms. Examples of the aromatic (meth) acrylate having 6 to 40 carbon atoms include naphthyl (meth) acrylate, phenyl (meth) acrylate, anthracenyl (meth) Acrylate or benzyl (meth) acrylate can be used.

The content of the aromatic (meth) acrylate can be appropriately controlled in accordance with the intended use of the second resin such as (meth) acrylate having the above-mentioned bulky alkyl group. For example, the content of the aromatic (meth) acrylate is 3 to 50 parts by weight, 10 to 40 parts by weight, 15 to 40 parts by weight, 20 to 40 parts by weight, 10 to 40 parts by weight based on 100 parts by weight of the total monomers contained in the monomer mixture, To 35 parts by weight, 10 to 30 parts by weight, 15 to 35 parts by weight, or 20 to 30 parts by weight.

In one example, the hyperbranched structural units are alkyl (meth) acrylates having a straight chain alkyl group of 1 to 4 carbon atoms; And

(Meth) acrylate having an alkyl group having 3 to 20 carbon atoms, alicyclic (meth) acrylate having an alicyclic ring having 5 to 40 carbon atoms, and an aromatic ring having 6 to 40 carbon atoms (Meth) acrylate and aryl (meth) acrylate.

The kind of the hyperbranched polymer and the general manufacturing method are well known in the art and can be referred to, for example, in Prog. Polym. Sci. 29 (2004) 183-275.

In one example, the core is cyclodextrin, and the hyperbranched structural units use a compound having a structure in which part or all of the hydroxy group of the cyclodextrin is substituted with a halogen element in the case of the second resin derived from an acrylate monomer as an initiator , And growing the chain using the atom transfer radical polymerization (ATRP) from the halogen end. Atomic transfer radical polymerization is also known in the art, and a general description thereof can be found, for example, in the article (Macromolecules, 2012, 45 (10), pp 4015-4039).

In one example, the resin mixture may comprise 0.1 to 50 parts by weight of the second resin based on 100 parts by weight of the first resin. Further, in another example, the resin mixture may include 1 to 30 parts by weight, 1 to 20 parts by weight or 1 to 15 parts by weight based on 100 parts by weight of the first resin. When the first resin and the second resin are contained in such a content, the content of the second resin, which is relatively high compared to the first resin, can be appropriately controlled to provide an economical resin mixture.

The resin mixture described above can be made into pellets by extrusion. The pellets produced using the resin mixture may comprise a first resin and a second resin.

According to one embodiment, the pellet comprises a first resin; And a second resin having a constant α value of 0.1 to 0.5 in the Mark-Houwink equation represented by the general formula (1).

The types and physical properties of the first resin and the second resin have already been described in detail, and the detailed description thereof will be omitted.

On the other hand, the above-mentioned resin mixture or pellet can be melt-processed to provide a molded resin article.

According to one embodiment, there is provided a method for producing a melt blend, comprising: melting a resin mixture to form a melt blend; And a step of processing the molten mixture.

As described above, since the second resin is a hyperbranched polymer and has a low melt viscosity, the melt viscosity of the resin mixture can be lowered to impart excellent processability.

The step of melt-working the resin mixture can be carried out under shear stress. For example, the step of melt-working can be carried out by an extrusion and / or an injection-molding method.

Further, in the step of melt-processing the resin mixture, the applied temperature may be different depending on the kind of the first resin and the second resin used. For example, when a styrene resin is used as the first resin and an acrylic resin is used as the second resin, the melt processing temperature can be controlled to about 210 to 270 캜.

The method may further include the step of curing the resulting product obtained by melt-processing the resin mixture, that is, the melt-processed product of the resin mixture. The curing may be, for example, thermal curing or UV curing. The resin molded article may further be subjected to chemical or physical treatment.

In one example, the manufacturing method of the resin molded article may further include the step of producing the second resin before the step of melting the resin mixture to form the molten mixture. The second resin can impart excellent processability and specific functions, for example, high hardness, to the resin molded article. The contents related to the production of the second resin have already been described, and a detailed description thereof will be omitted.

According to another embodiment, a method of manufacturing a resin molded article includes melting a pellet to form a molten mixture; And processing the molten mixture.

In one example, the pellets may be prepared by melt-processing the above-mentioned resin mixture, such as extrusion. The pellets thus produced can be made into a resin molded article by melt processing such as injection molding. However, the present invention is not limited thereto. In another example, the resin mixture may be directly molded into a resin molded product by melt processing such as injection molding or the like.

On the other hand, according to another embodiment, the resin molded article may include first and second resins, and the second resin may have a Mark-Houwink constant α And a value of 0.1 to 0.5.

The first resin determines the physical properties of the molded article, and the second resin can impart excellent workability and mechanical properties to the molded article. The details of the first resin and the second resin have already been described above, Will not be described.

In one example, the resin molded article can be used for providing automobile parts, helmets, electric appliance parts, spinning machine parts, toys, pipes, and the like.

The exemplary resin mixture of the present application can provide a resin molded article having excellent processability while having improved mechanical properties and surface hardness.

Fig. 1 shows an example of a super-branched structure.
Fig. 2 shows another example of the super-branched structure.
FIG. 3 shows an example of a hyperbranched polymer structure.
Fig. 4 shows another example of the super-branched polymer structure.

Hereinafter, the resin mixture will be described in detail by way of examples and comparative examples, but the range of the resin mixture is not limited by the examples given below.

The physical properties in the following Examples and Comparative Examples were evaluated in the following manner, and the evaluated physical properties are shown in Table 1 below.

1. Absolute molecular weight and Mark - Houwink  Parameter measurement

The absolute molecular weight and the Mark-Houwink parameter alpha value of the second resin obtained in Examples and Comparative Examples were measured using a TDA302 product of Viscotek.

Specifically, a solution prepared by dissolving the resin or the test piece obtained in Examples and Comparative Examples in 0.1 wt% of tetrahydrofuran, respectively, was passed through a syringe filter (0.02 mu m) to remove foreign matters. . The solvent used was tetrahydrofuran, and the solution was passed through a Jordi DVB mixed bed column at a rate of 0.8 ml / min at 40 ° C.

2. Measurement of melt viscosity

The melt viscosity was measured using a capillary rheometer (Capillary Rheometer 1501, Gottfert).

Specifically, a capillary die was attached to a barrel, and then the resin obtained in Example or Comparative Example was divided into three portions. Shear viscosity (pa * s) was measured at a processing temperature of 220 ° C according to a shear rate of 100 to 1000 s ^-1 .

3. Melt flow index  Measure

The melt flow index of the extruded pellets prepared in Examples and Comparative Examples was measured according to ASTM D1238 using MELT INDEXER F-B01 manufactured by TOYOSEIKI.

Specifically, extruded pellets obtained in Examples and Comparative Examples were filled in capillaries heated to 220 占 폚, and a load of 10 kg was applied. The specimens passed through the capillary tube for one minute from a certain point were collected, weighed, and converted to a melt flow index through an arithmetic calculation. Each specimen was measured five times and the average value was obtained.

4. Strength measurement experiment

The strengths of the specimens obtained in Examples and Comparative Examples were measured according to ASTM D256. Specifically, the energy (kg * cm / cm) required to break the V-shaped groove of the pendulum was measured by using an impact tester (Impact 104, Tinius Olsen). The measurement was carried out five times for the 1/8 "and 1/4" specimens, and the average value was obtained

5. Pencil hardness measurement experiment

The surface pencil hardness of the specimens obtained in Examples and Comparative Examples was measured under a constant load of 500 g using a pencil hardness tester (Chungbuk Tech). A standard pencil (manufactured by Mitsubishi) was changed from 6B to 9H while maintaining an angle of 45 degrees, and scratches were applied to observe the rate of change of the surface (ASTM 3363-74). The measurement result is the average value of the results of five repeated experiments.

Manufacturing example  - Preparation of the second resin

Manufacturing example  One

1.47 g of copper (I) chloride (CuCl), which is an atom transfer radical polymerization catalyst, was introduced into a 5-liter reactor closed by purging with nitrogen, 1200 g of toluene as a solvent, 2.500 g of methyl methacrylate and 2.58 g of ligand pentamethyl diethylenetriamine (N, N, N ', N ", N" -pentamethyldiethylenetriamine) were added to the autoclave at a rate of 30 Min. 23.96 g of an atom transfer radical polymerization initiator, 21Br-β-CD, was added under the condition that oxygen was shut off, followed by polymerization at 80 ° C. for 2 hours. The polymerization product was exposed to oxygen, cooled to 30 DEG C, passed through an alumina column for catalyst removal, washed three times with hexane, and dried in an oven to prepare a second resin .

Manufacturing example  2

A second resin was prepared in the same manner as in Production Example 1, except that 1620 g of methyl methacrylate and 180 g of cyclohexyl methacrylate were used as monomers.

Manufacturing example  3

1500 g of distilled water and 4 g of a 2% aqueous solution of polyvinyl alcohol as a dispersant were added and dissolved in a 3 L reactor. Then, 800 g of methyl methacrylate, 2.4 g of n-dodecylmercaptan as a chain transfer agent and 2.4 g of azobisdimethylvaleronitrile as an initiator were further added to the reactor and mixed at 400 rpm with stirring. The mixture was reacted at 60 캜 for 3 hours to polymerize, and cooled to 30 캜 to obtain a bead-shaped second resin. The second resin was then washed three times with distilled water, dehydrated and then dried in an oven.

Example  One

90 parts by weight of a first resin (a thermoplastic resin consisting of 60 parts by weight of methyl methacrylate, 7 parts by weight of acrylonitrile, 10 parts by weight of butadiene and 23 parts by weight of styrene) and 10 parts by weight of the second resin prepared in Preparation Example 1 And then extruded at a temperature of 240 DEG C in a twin-screw extruder (Leistritz) to obtain a pellet. Then, these pellets were injected at an extrusion temperature of 240 DEG C in an EC100? 30 extruder (manufactured by ENGEL) to prepare specimens of molded resin products.

Example  2

A specimen was prepared in the same manner as in Example 1, except that 10 parts by weight of the second resin obtained in Preparation Example 2 was mixed with 90 parts by weight of the same first resin as used in Example 1.

Comparative Example  One

100 parts by weight of the first resin pellets used in Example 1 were dried in an oven and injected at a temperature of 240 DEG C in an EC100? 30 extruder (manufactured by ENGEL) to prepare a molded resin product specimen.

Comparative Example  2

90 parts by weight of a first resin (a thermoplastic resin consisting of 60 parts by weight of methyl methacrylate, 7 parts by weight of acrylonitrile, 10 parts by weight of butadiene and 23 parts by weight of styrene) and 10 parts by weight of the second resin prepared in Preparation Example 3 And then extruded at a temperature of 240 DEG C in a twin-screw extruder (Leistritz) to obtain a pellet. Then, these pellets were injected at an extrusion temperature of 240 DEG C in an EC100? 30 extruder (manufactured by ENGEL) to prepare specimens of molded resin products.

Example 1 Example 2 Comparative Example 1 Comparative Example 2 The first resin
The first resin XG 568 XG 568 XG 568 XG 568 The melt viscosity (pa * s) 370 370 370 370

The second resin

The second resin Production Example 1 Production Example 2 - Production Example 3 The melt viscosity (pa * s) 160 140 - 1330 Absolute molecular weight (kg / mol) 102K 115K - 108K Molecular weight distribution 1.2 1.2 - 2 alpha value 0.223 0.287 - 0.684 The melt flow index (g / 10 min) 24.1 26.1 18 17 Pencil Strength H 2H F H Strength measurement 1/8 " 5.4 8.8 10 5.2 1/4 " 5.3 9 10 4.9

It was confirmed that the star-shaped polymer was synthesized through the Mark-Houwink parameter alpha value of the above embodiment. The resin molded article produced according to the above example had a high melt flow index without lowering pencil hardness and impact strength, Can be confirmed.

Claims (16)

A first resin; And
And a second resin having a constant α value of 0.1 to 0.5 in the Mark-Houwink equation represented by the following general formula (1)
The second resin is a hyperbranched polymer,
Wherein the hyperbranched polymer comprises a core and a resin mixture which is a star polymer containing three or more superbranched structural units bonded to the core,
[Formula 1]
[?] = KM ^?
In the above general formula,
? represents the intrinsic viscosity of the second resin,
M represents the weight average molecular weight of the second resin,
K and? Are constants applied when the second resin is dissolved in tetrahydrofuran at 40 占 폚. The resin composition according to claim 1, wherein the first resin is selected from the group consisting of a styrene resin, a polyolefin resin, a thermoplastic elastomer, a polyoxyalkylene resin, a polyester resin, a polyvinyl chloride resin, a polycarbonate resin, Vinyl alcohol resins, polyamide resins, acrylate resins, engineering plastics, copolymers thereof, or mixtures thereof. delete The resin composition according to claim 1, wherein the hyperbranched polymer is a resin mixture satisfying the following general formula (2) and general formula (3):
[Formula 2]
0.01 V ^L = V ^H = 0.07 V ^L
[Formula 3]
0.9 W ^H = W ^L = 1.1 W ^H
In the above general formulas 2 and 3,
V ^H represents the melt viscosity of the hyperbranched polymer at 220 ° C and 1000 s ^-1 ,
V ^L represents the melt viscosity of a linear polymer polymerized with the same monomer component as the hyperbranched polymer at 220 ° C and 1000 s ^-1 ,
W ^H represents the weight average molecular weight of the hyperbranched polymer,
And W ^L represents the weight average molecular weight of the linear polymer. delete The resin mixture of claim 1 wherein the core is a derivative of cyclodextrin and the hyperbranched structural units are derived from acrylate monomers. The method of claim 1, wherein the hyperbranched structural units comprise
Alkyl (meth) acrylates having a straight chain alkyl group having 1 to 4 carbon atoms; And
(Meth) acrylate having an alkyl group having 2 to 20 carbon atoms, alicyclic (meth) acrylate having an alicyclic ring having 5 to 40 carbon atoms, and an aromatic ring having 6 to 40 carbon atoms (Meth) acrylate; and a monomer mixture comprising at least one organic (meth) acrylate selected from the group consisting of alkyl (meth) acrylate and aryl (meth) acrylate. 8. The composition of claim 7, wherein the mixture of monomers comprises
60 to 95 parts by weight of an alkyl (meth) acrylate; And
5 to 40 parts by weight of an organic (meth) acrylate. The resin mixture according to claim 1, comprising 0.1 to 50 parts by weight of a second resin based on 100 parts by weight of the first resin. A first resin; And a second resin having a constant α value of 0.1 to 0.5 in the Mark-Houwink formula represented by the following general formula (1)
The second resin is a hyperbranched polymer,
Wherein the hyperbranched polymer is a star polymer containing three or more hyperbranched structural units bonded to the core and the core,
[Formula 1]
[?] = KM ^?
In the above general formula,
? represents the intrinsic viscosity of the second resin,
M represents the weight average molecular weight of the second resin,
K and? Are constants applied when the second resin is dissolved in tetrahydrofuran at 40 占 폚. Melting the resin mixture of claim 1 to form a molten mixture; And processing the molten mixture. The method of manufacturing a resin molded article according to claim 11, wherein the melting and processing is performed under shear stress. The method of manufacturing a resin molded article according to claim 11, further comprising a step of curing after the melting and processing step. 14. The method according to claim 13, wherein the curing is thermosetting or UV curing. Melting the pellet of claim 10 to form a molten mixture; And processing the molten mixture. A first resin and a second resin,
The second resin
Is a hyperbranched polymer having a constant α value of 0.1 to 0.5 in the Mark-Houwink formula represented by the following general formula (1)
Wherein the hyperbranched polymer is a star-shaped polymer comprising a core and three or more superbranched structural units bonded to the core,
[Formula 1]
[?] = KM ^?
In the above general formula,
? represents the intrinsic viscosity of the second resin,
M represents the weight average molecular weight of the second resin,
K and? Are constants applied when the second resin is dissolved in tetrahydrofuran at 40 占 폚.

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