Chlorinated polyvinyl chloride resin composition, extruded sheet and method for producing same

Abstract

To provide a chlorinated polyvinyl chloride resin composition containing a chlorinated polyvinyl chloride resin and a plasticization processing aid.SOLUTION: A used amount of a chlorinated polyvinyl chloride resin is 80 pts.wt. to 120 pts.wt., a degree of polymerization thereof is 500 to 1,100, and a content of chlorine is 60% to 75%. The plasticization processing aid contains a chlorinated ethylene graft copolymer and an acrylate-based compound. A functional group grafted with the chlorinated ethylene graft copolymer is at least one of a polyester-based functional group and an ethylene-vinyl acetate-based functional group. When the used amount of the chlorinated ethylene graft copolymer is represented by A pts.wt., and the used amount of the acrylate-based compound is represented by B pts.wt., the used amount of the plasticization processing aid satisfies the conditions of (i) A+B=5 pts.wt. or less, (ii) A / (A+B)=80% or more and (iii) B / (A+B)=20% or less. There are also provided an extrusion sheet and a manufacturing method of the same.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a resin composition, and more particularly to a chlorinated polyvinyl chloride resin composition and a method for producing the same. [Background technology]

[0002] Chlorinated polyvinyl chloride (CPVC) is a thermoplastic made by chlorinating polyvinyl chloride resin. Chlorinated polyvinyl chloride has better heat resistance, corrosion resistance, and flame retardancy than ordinary polyvinyl chloride. Chlorinated polyvinyl chloride has the advantages of high mechanical strength, flexibility, and insulation, as well as being non-polluting, resistant to aging, lightweight, and easy to construct.

[0003] Transparent products made of polyvinyl chloride resin are widely used in the fields of electricity, automobiles, medicine, and semiconductors. However, many of the commercially available extruded sheets of chlorinated polyvinyl chloride have no transparency or low transparency, and therefore have many application limitations, such as being unable to be used in devices that require transparency.

[0004] Chinese Patent Publication CN101421347B discloses a chlorinated polyvinyl chloride resin having heat resistance and light transmittance and a manufacturing method thereof. In this patent, polyphenyl sulfone (PPSU) and polyethylene terephthalate (PET) are used as main materials, and by adding a coupling agent and an accelerator, polyphenyl sulfone (PPSU) and polyethylene terephthalate (PET) are crosslinked with each other, so that the prepared resin composition can achieve better mechanical strength and transparency.

[0005] Chinese Patent Publication CN105295271B discloses a chlorinated polyvinyl chloride resin composition having heat resistance and light transmittance, which is prepared by blending a number of auxiliary agents into the chlorinated polyvinyl chloride resin, in particular by using a transparency modifier of perchlorate salt to change the complex formation and distribution of electron cloud within the chain of the chlorinated polyvinyl chloride, so that the prepared chlorinated polyvinyl chloride resin composition has a light transmittance of 80% or more and a Vicat softening temperature of 110°C or more.

[0006] International Patent Publication WO2007121046A1 discloses a chlorinated polyvinyl chloride resin having heat resistance and light transmittance and a manufacturing method thereof. In this patent, CPVC powders from different manufacturers are compared. Among them, by using CPVC powder (HA-17F) from Sekisui America Corporation (SAC), it is possible to have a transparency of 57.2% and a haze of 12.7%.

[0007] The above patented technologies can provide chlorinated polyvinyl chloride resin with heat resistance and light transmittance, but all of these patented technologies have problems such as complicated processes, low formulation stability, and insufficient transparency.

[0008] Therefore, the present inventors have devoted themselves to the research and application of scientific principles in order to improve the above deficiencies, and finally put forward the present invention which effectively improves the above deficiencies with rational design. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] China Patent Publication No. CN101421347B [Patent Document 2] China Patent Publication No. CN105295271B [Patent Document 3] International Patent Publication No. WO2007121046A1 Summary of the Invention [Problem to be solved by the invention]

[0010] The technical problem to be solved by the present invention is to provide a chlorinated polyvinyl chloride resin composition, an extruded sheet and a method for producing the same in consideration of the shortcomings of the prior art. [Means for solving the problem]

[0011] In order to solve the above technical problems, the technical solution used in the present invention is to provide a chlorinated polyvinyl chloride resin composition. The chlorinated polyvinyl chloride resin composition contains a chlorinated polyvinyl chloride resin used in an amount of 80 to 120 parts by weight, having a degree of polymerization of 400 to 1100 and a chlorine content of 60% to 75%, and a plasticizing processing aid containing a chlorinated ethylene graft copolymer and an acrylate-based compound, and a functional group to which the chlorinated ethylene graft copolymer is grafted is at least one selected from a material group consisting of polyesters and ethylene-vinyl acetates. When the amount of the chlorinated ethylene graft copolymer used is A parts by weight and the amount of the acrylate-based compound used is B parts by weight, the amount of the plasticizing processing aid used satisfies the following conditions: (i) A+B is 5 parts by weight or less, (ii) A / (A+B) is 80% or more, and (iii) B / (A+B) is 20% or less. The chlorinated polyvinyl chloride resin composition has a plasticizing speed of 50 to 100 seconds at a temperature of 170°C to 200°C.

[0012] The chlorinated polyvinyl chloride resin composition preferably further contains 0.5 to 20 parts by weight of a transparent reinforcing agent which is a methyl methacrylate-butadiene-styrene elastomer.

[0013] The chlorinated polyvinyl chloride resin composition preferably further contains 0.5 to 30 parts by weight of a heat resistance improver which is an α-methylstyrene-acrylonitrile copolymer having a heat distortion temperature of 115°C to 130°C.

[0014] The chlorinated polyvinyl chloride resin composition preferably further contains 0.5 to 10 parts by weight of a heat stabilizer which is at least one selected from the group consisting of an organic tin thioester, a calcium zinc stabilizer, and a talc-based stabilizer.

[0015] The chlorinated polyvinyl chloride resin composition preferably further contains 0.1 to 3 parts by weight of an auxiliary heat stabilizer which is epoxidized soybean oil.

[0016] The chlorinated polyvinyl chloride resin composition preferably further contains 0.1 to 1 part by weight of a lubricant which is at least one selected from the group consisting of lignite wax, complex ester wax, polyethylene wax, and oxidized polyethylene wax.

[0017] The chlorinated polyvinyl chloride resin composition preferably further contains 0.1 to 3 parts by weight of an antioxidant which is at least one selected from the group consisting of hindered phenol-based antioxidants and phosphite-based antioxidants.

[0018] The chlorinated polyvinyl chloride resin composition preferably further contains 0.0001 to 0.05 parts by weight of at least one pigment selected from the group of materials consisting of ultramarine pigments and violet pigments.

[0019] In order to solve the above technical problems, another technical solution used in the present invention provides an extruded sheet formed of the above chlorinated polyvinyl chloride resin composition.

[0020] In order to solve the above technical problem, another technical solution used in the present invention is to provide a method for producing an extruded sheet, which includes: feeding the chlorinated polyvinyl chloride resin composition into a heating stirring mixer, mixing the chlorinated ethylene resin composition at a stirring speed of 300 RPM to 1800 RPM and a heating temperature of 100°C to 120°C, feeding the mixed chlorinated ethylene resin composition into a cooling stirring mixer and cooling it to a cooling temperature of 35°C to 50°C, and feeding the cooled chlorinated ethylene resin composition into an extruder, mixing and melting it at a melting temperature of 170°C to 200°C, and sequentially extruding, molding, cooling and cutting to obtain an extruded sheet. Effect of the Invention

[0021] Regarding one of the beneficial effects of the present invention, the chlorinated polyvinyl chloride resin composition, extruded sheet and manufacturing method thereof provided by the present invention are as follows: "a chlorinated polyvinyl chloride resin used in an amount of 80 to 120 parts by weight, having a degree of polymerization of 400 to 1100 and a chlorine content of 60% to 75%", "a plasticizing processing aid comprising a chlorinated ethylene graft copolymer and an acrylate-based compound, the functional group to which the chlorinated ethylene graft copolymer is grafted being at least one selected from the group consisting of polyester-based and ethylene-vinyl acetate-based materials", and "a plasticizing processing aid comprising a chlorinated ethylene graft copolymer and an acrylate-based compound, the functional group being at least one selected from the group consisting of polyester-based and ethylene-vinyl acetate-based materials". The amount of the copolymer used is A parts by weight, the amount of the acrylate compound used is B parts by weight, and the amount of the plasticizing processing aid used satisfies the conditions that (i) A+B is 5 parts by weight or less, (ii) A / (A+B) is 80% or more, and (iii) B / (A+B) is 20% or less, and the chlorinated polyvinyl chloride resin composition has a plasticizing rate of 50 to 100 seconds at a temperature of 170°C to 200°C. By this technical solution, the CPVC extruded sheet can have high heat resistance, high toughness, high transparency, low haze, and excellent processing and moldability. In addition, the CPVC extruded sheet can have the advantages of simple processing and good formulation stability. [Brief description of the drawings]

[0022] [Figure 1] FIG. 1 is a schematic flow diagram of a method for producing an extruded sheet according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] In order to further understand the features and technical contents of the present invention, please refer to the following detailed description of the present invention and the drawings, but the drawings provided are for reference and description purposes only, and are not intended to limit the present invention.

[0024] The following are specific examples for explaining the embodiments disclosed in the present invention, and those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention can be implemented or applied through other different specific examples, and various details of the present specification can be modified and changed based on different perspectives and applications without departing from the concept of the present invention. In addition, it is noted in advance that the drawings of the present invention are schematic and not drawn to actual size. The following examples will further explain the technical contents related to the present invention in detail, but the disclosed contents are not intended to limit the protection scope of the present invention.

[0025] It should be understood that although terms such as "first," "second," and "third" may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are primarily used to distinguish one element from another, or a signal from another. Furthermore, the term "or" as used herein should include any or a combination of the associated listed items, as the case may be.

[0026] [Chlorinated polyvinyl chloride resin composition]

[0027] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a chlorinated polyvinyl chloride resin composition that is suitable for forming an extruded sheet by an extrusion process and has high transparency and heat resistance.

[0028] In order to achieve the above object, the chlorinated polyvinyl chloride resin composition according to the embodiment of the present invention comprises at least a chlorinated polyvinyl chloride resin (CPVC resin) and a plasticizing processing aid.

[0029] The amount of the chlorinated polyvinyl chloride resin used is 80 parts by weight to 120 parts by weight, preferably 90 parts by weight to 110 parts by weight. The degree of polymerization (DP) of the chlorinated polyvinyl chloride resin is between 400 and 1100, preferably between 500 and 1000. The chlorine content of the chlorinated polyvinyl chloride resin is between 60% and 75%, preferably between 65% and 70%. The "degree of polymerization" referred to in this application is a measure of the molecular size of a polymer. It is also called the average degree of polymerization based on the number of repeating units, i.e., the average number of repeating units contained in the polymer polymer chain. The "chlorine content" referred to in this application is in weight %, and can be measured by the method described in JIS K 7229.

[0030] The plasticizing processing aid includes a vinyl chloride graft copolymer and, optionally, acrylics (ACR).

[0031] Here, the ethylene chloride graft copolymer To Graft was doneThe functional group is at least one selected from the group consisting of polyesters and ethylene-vinyl acetates. Here, the amount of the ethylene chloride graft copolymer used is A parts by weight, and the amount of the acrylate compound used is B parts by weight.

[0032] In this embodiment, the amount of the plasticizing processing aid used satisfies the following conditions.

[0033] (i) A+B is 5 parts by weight or less, preferably between 0.5 and 5 parts by weight, and particularly preferably between 0.5 and 4.5 parts by weight.

[0034] (ii) A / (A+B) is 80% or more, and preferably 85% or more.

[0035] (iii) B / (A+B) is not more than 20%, preferably not more than 15%.

[0036] The chlorinated polyvinyl chloride resin compositions of the examples of the present invention have a plasticization rate of 50 to 100 seconds under temperature conditions of 170°C to 200°C, and preferably 60 to 80 seconds.

[0037] In addition, patents on compositions are sometimes expressed in two terms: "parts by weight" and "weight percentage (wt%)". The "parts display method" of a composition reflects the proportional relationship between the components, so the "parts display method" does not have the two restrictions that must be met in the "percentage display method", namely, the two "formula of upper and lower limit requirements" and "the sum of the percentages in the examples is 100". The two "formula of upper and lower limit requirements" require that the upper limit of the content of a single component plus the lower limit of the content of other components must be <= 100%, and the lower limit of the content of a single component plus the upper limit of the content of other components must be >= 100%. When parts by weight are converted to percentages, this means that there is a percentage standard, that is, a total standard, and the upper and lower limit rules must be followed. As a conversion method, for example, a composition containing 50 parts by weight of A and 20 parts by weight of B is converted to a composition containing 50 / (50+20)% by weight of A and 20 / (50+20)% by weight of B.

[0038] According to the above-mentioned configuration, the chlorinated polyvinyl chloride resin composition of the embodiment of the present invention uses chlorinated ethylene graft copolymer as a main plasticizing processing aid, and the chlorinated ethylene graft copolymer and the chlorinated polyvinyl chloride resin have good compatibility and can provide good plasticizing ability at low temperature. The chlorinated ethylene graft copolymer can replace the conventional plasticizing processing aid (ACR) or effectively reduce the amount of the ACR used. In addition, the chlorinated polyvinyl chloride resin composition of the embodiment of the present invention can achieve rapid plasticization at low temperature without adding plasticizer, and can solve the problem of decomposition yellowing of chlorinated polyvinyl chloride resin at high temperature, thereby increasing the transparency of the material, improving the hue of the material, and reducing the haze of the material.

[0039] More specifically, the ethylene chloride graft copolymer provides good plasticizing ability at low temperature due to its ethylene chloride chemical structure and good compatibility with chlorinated polyvinyl chloride resin (CPCV) and the grafted functional group (e.g., polyester-based or ethylene-vinyl acetate-based). From the viewpoint of plasticizing ability, in order to provide good plasticizing ability at low temperature, the grafted functional group must be polyester-based or ethylene-vinyl acetate-based. If other types of functional groups are grafted, the ethylene chloride graft copolymer may not be able to provide good plasticizing ability at low temperature, and furthermore, the technical objective of the present application, such as improvement of transparency, cannot be achieved. That is, the functional group grafted to the ethylene chloride graft copolymer in the embodiments of the present invention is specially considered.

[0040] Furthermore, since the chlorinated polyvinyl chloride resin composition of the embodiment of the present invention can produce the effect of an external lubricant by the chlorinated ethylene graft copolymer, the amount of external lubricant used can be reduced, and at the same time, improved transparency, reduced haze, and excellent processability can be achieved.

[0041] In some embodiments of the present invention, in order to improve the compatibility of the ethylene chloride graft copolymer with chlorinated polyvinyl chloride resin and provide a good plasticization rate at low temperature, the ethylene chloride content of the ethylene chloride graft copolymer is 65-85 wt%, the graft rate of vinyl functional groups is 10-15 wt%, and the graft rate of polyester functional groups is 5-15 wt%, but the present invention is not limited thereto.

[0042] In some embodiments of the present invention, the chlorinated polyvinyl chloride resin composition may further comprise a transparent toughening agent.

[0043] The amount of the transparent reinforcing agent used is between 0.5 and 20 parts by weight, preferably between 1 and 10 parts by weight.

[0044] The transparent reinforcing agent may be, for example, methyl methacrylate-butadiene-styrene elastomer (MBS), but the present invention is not limited thereto.

[0045] The embodiment of the present invention provides good synergistic impact resistance due to the good compatibility of the chlorinated ethylene graft copolymer with the chlorinated polyvinyl chloride resin and the transparent reinforcing agent, and can effectively reduce the amount of impact resistance additive, while maintaining the impact resistance, increasing the heat distortion temperature, and reducing the cost.

[0046] In some embodiments of the present invention, the chlorinated polyvinyl chloride resin composition may further comprise a heat resistant enhancer.

[0047] The amount of the heat resistance improver used is between 0.5 and 30 parts by weight, preferably between 1 and 20 parts by weight.

[0048] The heat resistance improver may be, for example, alpha-methyl styrene acrylonitrile copolymer, but the present invention is not limited thereto.

[0049] The α-methylstyrene-acrylonitrile copolymer used in the embodiments of the present invention has a heat distortion temperature between 115° C. and 130° C., preferably between 120° C. and 125° C. In addition, due to the good compatibility between the α-methylstyrene-acrylonitrile copolymer and chlorinated polyvinyl chloride resin, the extruded sheet can have high transparency and high heat distortion temperature.

[0050] In some embodiments of the present invention, the chlorinated polyvinyl chloride resin composition may further comprise a heat stabilizer.

[0051] The amount of the heat stabilizer used is between 0.5 and 10 parts by weight, preferably between 1 and 5 parts by weight.

[0052] The thermal stabilizer is at least one selected from the group consisting of organotin thioesters, calcium / zinc stabilizers, and talc stabilizers. Here, the organotin thiol esters include, for example, methyltin mercaptide, but the present invention is not limited thereto.

[0053] In some embodiments of the present invention, the chlorinated polyvinyl chloride resin composition may further comprise an auxiliary heat stabilizer.

[0054] The amount of the auxiliary heat stabilizer used is between 0.1 and 3 parts by weight, preferably between 0.1 and 1 part by weight.

[0055] The auxiliary heat stabilizer may be, for example, epoxidized soybean oil (ESO), but the present invention is not limited thereto.

[0056] In some embodiments of the present invention, the chlorinated polyvinyl chloride resin composition may further comprise a lubricant.

[0057] The amount of the lubricating oil used is between 0.1 and 1 parts by weight, preferably between 0.1 and 0.5 parts by weight.

[0058] The lubricant is at least one selected from the group consisting of lignite wax (also known as montan max), complex ester wax, polyethylene wax, and oxidized polyethylene wax (OPE wax), but the present invention is not limited thereto.

[0059] It should be noted that the above lubricants all belong to the organic wax family and can provide lubricity and maintain transparency.

[0060] In some embodiments of the present invention, the chlorinated polyvinyl chloride resin composition may further comprise an antioxidant.

[0061] The amount of the antioxidant used is between 0.1 and 3 parts by weight, preferably between 0.1 and 1 part by weight.

[0062] The antioxidant is at least one selected from the group consisting of hindered phenolic antioxidants and phosphite antioxidants, but the present invention is not limited thereto. In a specific embodiment of the present invention, I-1010 hindered phenolic antioxidant is used.

[0063] In some embodiments of the present invention, the chlorinated polyvinyl chloride resin composition may further comprise a pigment.

[0064] The amount of the pigment used is between 0.0001 and 0.05 parts by weight, and preferably between 0.0001 and 0.01 parts by weight.

[0065] The pigment is at least one selected from the group of materials consisting of an ultramarine pigment and a purple pigment.

[0066] [Method of manufacturing extruded sheets]

[0067] The above examples are for explaining the material properties of the chloroethylene resin composition, and the following describes the method for producing the extruded sheet of the examples of the present invention.

[0068] An embodiment of the present invention provides a method for producing an extruded sheet, the method including steps S110, S120, S130, and S140.

[0069] The step S110 includes adding the ethylene chloride resin composition of the embodiment according to a ratio into a heating and stirring mixer.

[0070] The step S120 includes mixing the chlorinated ethylene resin composition in the mixer at an agitation speed between 300 RPM and 1800 RPM and a heating temperature between 100°C and 120°C.

[0071] The step S130 includes: the mixed chlorinated ethylene resin composition enters a cooling agitation mixer and is cooled to a cooling temperature between 35°C and 50°C.

[0072] The step S140 includes feeding the cooled chloroethylene resin composition into an extruder, mixing and melting the composition at a melting temperature between 170°C and 200°C, and sequentially extruding, molding, cooling and cutting the composition to obtain a CPVC extruded sheet.

[0073] According to the above-mentioned constitution, the CPVC extruded sheet can have high heat resistance, high toughness, high transparency, low haze, and excellent processing moldability. In addition, the CPVC extruded sheet has the advantages of simple processing and good formulation stability. EXAMPLES

[0074] [Experimental data and test results]

[0075] The present invention will be described in detail below with reference to Examples 1 to 4 and Comparative Examples 1 and 2. However, the following examples are provided only to clarify the present invention, and the scope of the present invention is not limited to the following examples.

[0076] Example 1: According to the formulation of Example 1, under low-speed stirring, chlorinated polyvinyl chloride, heat stabilizer, and auxiliary heat stabilizer were added, and mixed at a heating temperature of 110°C. Under the condition of increasing the stirring speed, ethylene / vinyl acetate, MBS, α heat resistance improver, antioxidant, and pigment were added in sequence and stirred uniformly, discharged into a cooling stirring mixer, cooled to between 35°C and 50°C, and the chlorinated ethylene resin composition of Example 1 was fed into an extruder, mixed and melted at a melting temperature between 170°C and 200°C, and extruded, molded, cooled, and cut in order to obtain a CPVC extruded sheet.

[0077] Example 2: According to the formulation of Example 2, under low-speed stirring, chlorinated polyvinyl chloride, heat stabilizer, and auxiliary heat stabilizer are added, and mixed at a heating temperature of 110°C. Under increasing the stirring speed, ethylene / vinyl acetate, MBS, α heat resistance improver, lubricant, antioxidant, and pigment are added in sequence and stirred uniformly, discharged into a cooling stirring mixer, cooled to 40°C, and the chlorinated ethylene resin composition of Example 2 enters an extruder, mixed and melted at a melting temperature between 170°C and 200°C, and extruded, molded, cooled, and cut in order to obtain a CPVC extruded sheet.

[0078] Example 3: According to the formulation of Example 3, under low-speed stirring, chlorinated polyvinyl chloride, heat stabilizer, and auxiliary heat stabilizer are added, and mixed at a heating temperature of 110°C. Under the condition of increasing the stirring speed, vinylidene chloride / vinyl versatate, MBS, α heat resistance improver, antioxidant, and pigment are added in sequence and stirred uniformly, then discharged into a cooling stirring mixer and cooled to between 35°C and 50°C. The chlorinated ethylene resin composition of Example 3 enters an extruder, is mixed and melted at a melting temperature between 170°C and 200°C, and is extruded, molded, cooled, and cut in sequence to obtain a CPVC extruded sheet.

[0079] Example 4: According to the formulation of Example 4, chlorinated polyvinyl chloride, heat stabilizer, and auxiliary heat stabilizer are added under low-speed stirring, and mixed at a heating temperature of 110°C. Under the condition of increasing the stirring speed, vinylidene chloride / vinyl versatate, MBS, α heat resistance improver, lubricant, antioxidant, and pigment are added in sequence and stirred uniformly, discharged into a cooling stirring mixer, cooled to between 35°C and 50°C, and the chlorinated ethylene resin composition of Example 4 is fed into an extruder, mixed and melted at a melting temperature between 170°C and 200°C, and extruded, molded, cooled, and cut in order to obtain a CPVC extruded sheet.

[0080] Comparative Example 1: According to the formulation of Comparative Example 1, chlorinated polyvinyl chloride, heat stabilizer, and auxiliary heat stabilizer were added under low-speed stirring, and mixed at a heating temperature of 110°C. While increasing the stirring speed, MBS, lubricating oil, antioxidant, and pigment were added in sequence and stirred uniformly, and discharged into a cooling stirring mixer and cooled to between 35°C and 50°C. The chlorinated ethylene resin composition of Comparative Example 1 entered an extruder, mixed and melted at a melting temperature between 170°C and 200°C, and extruded, molded, cooled, and cut in order to obtain a CPVC extruded sheet.

[0081] Comparative Example 2: According to the formulation of Comparative Example 2, chlorinated polyvinyl chloride, heat stabilizer, and auxiliary heat stabilizer are added in a low-speed stirring state, and mixed at a heating temperature of 110°C. With the stirring speed increased, acrylate processing aid, MBS, α heat resistance improver, lubricant, antioxidant, and pigment are added in sequence and stirred uniformly, discharged into a cooling stirring mixer, cooled to between 35°C and 50°C, and the chlorinated ethylene resin composition of Comparative Example 2 is fed into an extruder, mixed and melted at a melting temperature between 170°C and 200°C, and extruded, molded, cooled, and cut in sequence to obtain a CPVC extruded sheet.

[0082] The process parameters for each component are summarized in Table 1 below.

[0083] Next, the physical and chemical properties of the chlorinated polyvinyl chloride extruded sheets produced in Examples 1-4 and Comparative Examples 1-2 were tested, and the physical and chemical properties of these polyvinyl chloride extruded pipe materials, such as heat resistance temperature (℃), toughness (Kgf-cm / cm2), transparency (%), haze (%), plasticization rate, etc. were obtained. The test methods involved are as follows, and the test results are summarized in Table 1.

[0084] Heat resistance temperature: Comparing Examples 1 to 4 with Comparative Example 1, the formula with the addition of the heat resistance improver can effectively increase the Vicat temperature to 109°C. The test method for heat resistance temperature is to test using a heat deflection Vicat temperature tester, and the Vicat temperature (VST) was measured in accordance with GB / T1633 "Measurement of thermoplastic softening temperature (VST)", GB8802 "Measurement method for Vicat softening temperature of rigid polyvinyl chloride (PVC-U) pipe material and joints", and ASTM 1525 standards.

[0085] Toughness: Comparing Examples 1-4 and Comparative Example 2, when ethylene chloride graft copolymer partially replaces acrylate-based processing aid, the toughness can be slightly increased to 3.3Kgf-cm / cm2. The test method of toughness is to obtain the Izod impact strength (IZOD) of notched specimen according to ASTM D256 standard by testing with impact tester.

[0086] Transparency: Comparing Examples 1 and 3 with Comparative Example 1, when excessive lubricant is added, the transparency is reduced. Comparing Examples 1 and 3 with Comparative Example 2, adding polyethylene graft copolymer can effectively increase the transparency. The test method of transparency is to test the total light transmittance (TT) with a haze tester according to ASTM D1003 and ISO 13468 standards, and the total light transmittance (TT) of the sheet is the transparency.

[0087] Haze: Comparing Examples 1 and 3 with Comparative Example 1, when the lubricant is added in excess, the haze increases significantly. The haze test method is to test the haze value HAZE (ratio of diffuse transmittance to total light transmittance (TT)) with a haze tester conforming to ASTM D1003 and ISO 14782 standards.

[0088] Plasticization rate: Comparing Examples 1 and 3 with Comparative Example 2, the plasticization rate is similar when polyethylene graft copolymer is added and when no acrylate-based processing agent is added, and comparing Examples 1 and 3 with Comparative Example 1, the plasticization rate increases when polyethylene graft copolymer is added and when no acrylate-based processing agent is added, which contributes to improving transparency and production speed. The plasticization rate test method is to perform a rheological test at a specific temperature (170°C to 200°C) and a specific rotation speed (45RPM to 60RPM) using a torque rheometer (HAAKE PolyLab OS), and detect the plasticization time and equilibrium torque of the formula as a basis for evaluating the productivity of the formula.

[0089] [Table 1-1] [Table 1-2]

[0090] [Discussion of test results]

[0091] In Examples 1 to 4, by adding a chlorinated ethylene graft copolymer instead of a conventional acrylate-based processing aid, in addition to maintaining the plasticization rate, it has the effects of toughening, improving transparency, reducing haze, reducing equipment load by reducing processing torque, and improving production processability. By adding a heat resistance improver, it is possible to maintain high transparency and significantly improve the Vicat temperature of the sheet.

[0092] In addition, in Examples 1 to 4, one type of material and the amount used are exemplified for some auxiliary additives (e.g., reinforcing agent, heat resistance improver, heat stabilizer, auxiliary heat stabilizer, lubricant, antioxidant, pigment), but Examples 1 to 4 are mainly for confirming the technical effect of "adding chlorinated ethylene graft copolymer instead of conventional acrylate processing aid", which is also clearly confirmed. The experimental data in Table 1 does not focus on the material type and amount used of the auxiliary additive. Therefore, in Examples 1 to 4, the material type and amount used of the auxiliary additive are merely illustrative, and in order to understand the present invention, the protection scope of the present invention should not be limited to the contents included in the above examples.

[0093] [Beneficial Effects of the Examples]

[0094] One of the beneficial effects of the present invention is that the chlorinated polyvinyl chloride resin composition, extruded sheet and manufacturing method thereof provided by the present invention are "a chlorinated polyvinyl chloride resin used in an amount of 80 to 120 parts by weight, having a degree of polymerization of 400 to 1100 and a chlorine content of 60% to 75%", "a plasticizing processing aid containing a chlorinated ethylene graft copolymer and an acrylate-based compound, the functional group to which the chlorinated ethylene graft copolymer is grafted being at least one selected from the group consisting of polyester-based and ethylene-vinyl acetate-based materials", and "a plasticizing processing aid containing a chlorinated ethylene graft copolymer and an acrylate-based compound, the functional group being at least one selected from the group consisting of polyester-based and ethylene-vinyl acetate-based materials". When the amount of the copolymer used is A parts by weight, and the amount of the acrylate compound used is B parts by weight, the amount of the plasticizing processing aid used satisfies the conditions that (i) A+B is 5 parts by weight or less, (ii) A / (A+B) is 80% or more, and (iii) B / (A+B) is 20% or less, and the chlorinated polyvinyl chloride resin composition has a plasticizing rate of 50 to 100 seconds at a temperature of 170°C to 200°C. By the above technical solution, the CPVC extruded sheet can have high heat resistance, high toughness, high transparency, low haze, and excellent processing and moldability. In addition, the CPVC extruded sheet has the advantages of simple processing and good formulation stability.

[0095] The contents disclosed above are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. All equivalent technical modifications made using the contents of the description and drawings of the present invention are included within the scope of the claims of the present invention.

Claims

1. A chlorinated polyvinyl chloride resin used in an amount of 100 parts by weight, having a degree of polymerization of 400 to 1100 and a chlorine content of 60% to 75%; a plasticizing processing aid comprising a chlorinated ethylene graft copolymer in which the functional group to be grafted is vinylidene chloride / vinyl versatate and an acrylate compound; A chlorinated polyvinyl chloride resin composition comprising: Here, assuming that the amount of the chlorinated ethylene graft copolymer used is A parts by weight and the amount of the acrylate compound used is B parts by weight, the amount of the plasticizing processing aid used satisfies the following conditions: (i) A+B is 2 to 4.5 parts by weight, (ii) A is 2 to 4 parts by weight, and (iii) B is 0 to 0.5 parts by weight; The chlorinated polyvinyl chloride resin composition has a plasticization rate of 50 to 100 seconds at a temperature of 170° C. to 200° C., The acrylate compound is not a methyl methacrylate-butadiene-styrene elastomer or an α-methylstyrene-acrylonitrile copolymer. Chlorinated polyvinyl chloride resin composition.

2. Further, it contains 0.5 parts by weight to 20 parts by weight of a transparent reinforcing agent which is a methyl methacrylate-butadiene-styrene elastomer. The chlorinated polyvinyl chloride resin composition according to claim 1.

3. Further, the composition contains 0.5 to 30 parts by weight of a heat resistance improver which is an α-methylstyrene-acrylonitrile copolymer having a heat deflection temperature between 115° C. and 130° C. The chlorinated polyvinyl chloride resin composition according to claim 1.

4. Further, the composition contains 0.5 parts by weight to 10 parts by weight of a heat stabilizer, which is at least one selected from the group consisting of an organotin thioester, a calcium zinc stabilizer, and a talc stabilizer. The chlorinated polyvinyl chloride resin composition according to claim 1.

5. Additionally, it contains 0.1 to 3 parts by weight of an auxiliary heat stabilizer which is epoxidized soybean oil. The chlorinated polyvinyl chloride resin composition according to claim 1.

6. Further, the composition contains 0.1 to 1 part by weight of a lubricating oil, which is at least one selected from the group consisting of lignite wax, complex ester wax, polyethylene wax, and oxidized polyethylene wax. The chlorinated polyvinyl chloride resin composition according to claim 1.

7. The antioxidant further contains 0.1 to 3 parts by weight of at least one selected from the group consisting of hindered phenol-based antioxidants and phosphite-based antioxidants. The chlorinated polyvinyl chloride resin composition according to claim 1.

8. Furthermore, the material contains 0.0001 to 0.05 parts by weight of at least one pigment selected from the group consisting of ultramarine pigments and purple pigments. The chlorinated polyvinyl chloride resin composition according to claim 1.

9. An extruded sheet formed from the chlorinated polyvinyl chloride resin composition according to any one of claims 1 to 8.

10. A method for producing an extruded sheet, comprising the steps of: Putting the chlorinated polyvinyl chloride resin composition according to any one of claims 1 to 8 into a heating and stirring mixer; Mixing the chlorinated polyvinyl chloride resin composition at a stirring speed of between 300 RPM and 1800 RPM and a heating temperature of between 100° C. and 120° C.; The mixed chlorinated polyvinyl chloride resin composition is put into a cooling agitation mixer and cooled to a cooling temperature between 35°C and 50°C; and The cooled chlorinated polyvinyl chloride resin composition is fed into an extruder, mixed and melted at a melting temperature between 170°C and 200°C, and extruded, molded, cooled, and cut in order to obtain an extruded sheet. A method for producing an extruded sheet comprising the steps of:

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