KR102621088B1 - Rigid polyvinyl chloride pipe - Google Patents

Abstract

The present specification discloses a composition for a rigid polyvinyl chloride pipe and a pipe manufactured using the same. The composition for a rigid polyvinyl chloride pipe according to an aspect of the present invention and the pipe manufactured using the same contain a specific component in a specific content or specific amount. By including it in weight ratio, it has excellent tensile yield strength, no deformation or cracking occurred in the hot pressure creep test and flatness test, and it has a high Vicat softening temperature, and not only is lead not detected, but also in the immersion test. The degree of immersion in water, sodium chloride solution, sulfuric acid solution, nitric acid solution, and sodium hydroxide solution is all very low, resulting in excellent physical properties.

Description

Rigid polyvinyl chloride pipe {Rigid polyvinyl chloride pipe}

The examples below relate to compositions for rigid polyvinyl chloride pipes and pipes manufactured using the same.

Polyvinyl chloride (PVC) resin is a thermoplastic resin that is easy to process, is cheaper than polyethylene or metal materials, is lightweight, has high airtightness and corrosion resistance, and has been used for a long time due to its characteristics of being easy to handle and transport. It is widely applied for a wide variety of purposes as a material for various containers, packaging films, electrical cables, water pipes, and sewer pipes.

However, pipes made of such hard polyvinyl chloride resin lose strength at high and low temperatures, and their impact strength is weak, so care must be taken when handling them at low temperatures (below 5°C). They also have a large coefficient of thermal expansion and can be used in the event of a fire or When disposed of by incineration, chlorine gas is generated, which is harmful to the human body, and there are problems such as accelerated aging when exposed to direct sunlight for a long period of time.

Accordingly, as a result of conducting research on hard polyvinyl chloride pipes with excellent physical properties such as tensile strength and impact strength, the present invention was completed.

KR 10-1298664B1 KR 10-2012-0114886 A KR 10-1449583 B1 KR 10-2104272 B1

The present inventors completed the present invention as a result of conducting research on a rigid polyvinyl chloride pipe with excellent physical properties.

Accordingly, in one aspect, an object of the present invention is to provide a composition for rigid polyvinyl chloride pipes having excellent physical properties.

In another aspect, an object of the present invention is to provide a rigid polyvinyl chloride pipe manufactured using the composition.

One aspect of the present invention is a composition for a rigid polyvinyl chloride pipe, wherein the composition includes a polyvinyl chloride resin, and additionally 0.1 to 0.5 parts by weight of a stabilizer and 0.1 to 3 parts by weight of calcium carbonate based on 100 parts by weight of the polyvinyl chloride resin. parts by weight, 1 to 3 parts by weight of impact modifier, 0.1 to 0.4 parts by weight of filler, and 0.1 to 0.2 parts by weight of fat sugar, and the stabilizer is dioctyl phthalate (DOP), dioctyl terephthalate (DOTP). and 1,2-cyclohexane dicarboxylic acid diisononyl ester (DINCH) in a weight ratio of 1:0.3 to 0.5:0.1 to 0.3, and the impact modifier is an acrylic type. Provided is a composition for rigid polyvinyl chloride pipes, comprising an acrylic impact modifier (AIM) and methacrylate butadiene styrene (MBS) at a weight ratio of 1:0.7 to 0.9.

Another aspect of the present invention provides a composition wherein the weight ratio of DOP, DOTP and DINCH is 1:0.38:0.21.

Another aspect of the present invention provides a composition wherein the weight ratio of AIM and MBS is 1:0.78.

Another aspect of the present invention is a composition comprising 0.302 parts by weight of a stabilizer, 1.23 parts by weight of calcium carbonate, 1.89 parts by weight of an impact modifier, 0.27 parts by weight of a filler, and 0.148 parts by weight of fat sugar, based on 100 parts by weight of the polyvinyl chloride resin. provides.

Another aspect of the present invention provides a rigid polyvinyl chloride pipe manufactured using the composition.

The composition for rigid polyvinyl chloride pipes according to one aspect of the present invention and pipes manufactured using the same contain specific components in a specific content or specific weight ratio, thereby having excellent tensile yield strength and deformation in hot pressure creep tests and flatness tests. No cracks occurred, the Vicat softening temperature was high, and lead was not detected. In the immersion test, the degree of immersion in water, sodium chloride solution, sulfuric acid solution, nitric acid solution, and sodium hydroxide solution was very low. , has the effect of having excellent physical properties.

Figure 1 is a photograph of a pipe manufactured using a composition for a rigid polyvinyl chloride pipe according to an embodiment of the present invention.

Hereinafter, embodiments will be described in detail with reference to the attached drawings. However, various changes can be made to the embodiments, so the scope of the patent application is not limited or limited by these embodiments. It should be understood that all changes, equivalents, or substitutes for the embodiments are included in the scope of rights.

Specific structural or functional descriptions of the embodiments are disclosed for illustrative purposes only and may be modified and implemented in various forms. Accordingly, the embodiments are not limited to the specific disclosed form, and the scope of the present specification includes changes, equivalents, or substitutes included in the technical spirit.

Terms such as first or second may be used to describe various components, but these terms should be interpreted only for the purpose of distinguishing one component from another component. For example, a first component may be named a second component, and similarly, the second component may also be named a first component.

The terms used in the examples are for descriptive purposes only and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the embodiments belong. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms. The present embodiments only serve to ensure that the disclosure of the present invention is complete and that common knowledge in the technical field to which the present invention pertains is not limited. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims.

In the embodiments of the present invention, unless otherwise defined, all terms used herein, including technical or scientific terms, are the same as those commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. It has meaning. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless clearly defined in the embodiments of the present invention, have an ideal or excessively formal meaning. It is not interpreted as

The shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings for explaining embodiments of the present invention are illustrative, and the present invention is not limited to the matters shown. Additionally, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. When ‘includes’, ‘has’, ‘consists of’, etc. mentioned in this specification are used, other parts may be added unless ‘only’ is used. When a component is expressed in the singular, the plural is included unless specifically stated otherwise.

When interpreting a component, it is interpreted to include the margin of error even if there is no separate explicit description.

Each feature of the various embodiments of the present invention can be partially or fully combined or combined with each other, and as can be fully understood by those skilled in the art, various technical interconnections and operations are possible, and each embodiment may be implemented independently of each other. It may be possible to conduct them together due to a related relationship.

In one aspect, the present invention is a composition for a rigid polyvinyl chloride pipe, wherein the composition includes a polyvinyl chloride resin, and additionally 0.1 to 0.5 parts by weight of a stabilizer and 0.1 to 3 parts by weight of calcium carbonate based on 100 parts by weight of the polyvinyl chloride resin. parts by weight, 1 to 3 parts by weight of impact modifier, 0.1 to 0.4 parts by weight of filler, and 0.1 to 0.2 parts by weight of fat sugar, and the stabilizer is dioctyl phthalate (DOP), dioctyl terephthalate (DOTP). and 1,2-cyclohexane dicarboxylic acid diisononyl ester (DINCH) in a weight ratio of 1:0.3 to 0.5:0.1 to 0.3, and the impact modifier is an acrylic type. Provided is a composition for rigid polyvinyl chloride pipes, comprising an acrylic impact modifier (AIM) and methacrylate butadiene styrene (MBS) at a weight ratio of 1:0.7 to 0.9.

The composition according to one aspect of the present invention may include polyvinyl chloride resin, stabilizer, calcium carbonate, impact modifier, filler, and fat sugar.

The composition according to one aspect of the present invention may include 0.1 to 0.5 parts by weight of a stabilizer based on 100 parts by weight of the polyvinyl chloride resin. Specifically, the composition contains 0.1 parts by weight or more, 0.12 parts by weight, 0.14 parts by weight, 0.16 parts by weight, 0.18 parts by weight, 0.2 parts by weight, or 0.21 parts by weight based on 100 parts by weight of polyvinyl chloride resin. or more, 0.22 parts by weight or more, 0.23 parts by weight or more, 0.24 parts by weight or more, 0.25 parts by weight or more, 0.26 parts by weight or more, 0.27 parts by weight or more, 0.28 parts by weight or more, 0.29 parts by weight or more, 0.3 parts by weight or more, 0.302 parts by weight. It may contain more than 0.32 parts by weight, more than 0.35 parts by weight, or more than 0.4 parts by weight, and less than or equal to 0.5 parts by weight, less than or equal to 0.48 parts by weight, less than or equal to 0.46 parts by weight, less than or equal to 0.44 parts by weight, less than or equal to 0.42 parts by weight, and less than or equal to 0.4 parts by weight. , 0.39 parts by weight or less, 0.38 parts by weight or less, 0.37 parts by weight or less, 0.36 parts by weight or less, 0.35 parts by weight or less, 0.34 parts by weight or less, 0.33 parts by weight or less, 0.32 parts by weight or less, 0.31 parts by weight or less, 0.302 parts by weight or less. , may include 0.3 parts by weight or less, 0.25 parts by weight or less, or 0.2 parts by weight or less. More specifically, the composition may include 0.302 parts by weight of a stabilizer based on 100 parts by weight of the polyvinyl chloride resin.

Stabilizers according to one aspect of the present invention include dioctyl phthalate (DOP), dioctyl terephthalate (DOTP), and 1,2-cyclohexane dicarboxylic acid diisononyl ester (1,2- It may include cyclohexane dicarboxylic acid diisononyl ester, DINCH).

The weight ratio of DOP, DOTP, and DINCH according to one aspect of the present invention may be 1:0.3 to 0.5:0.1 to 0.3.

Specifically, the weight ratio of DOP and DOTP may be 1:0.3 or more, 0.31 or more, 0.32 or more, 0.33 or more, 0.34 or more, 0.35 or more, 0.36 or more, 0.37 or more, 0.38 or more, 0.4 or more, or 0.45 or more, and 1:0.5. It may be 0.49 or less, 0.48 or less, 0.47 or less, 0.46 or less, 0.45 or less, 0.44 or less, 0.43 or less, 0.42 or less, 0.41 or less, 0.4 or less, 0.39 or less, 0.38 or less, 0.36 or less, or 0.35 or less, and more specifically, The weight ratio of DOP and DOTP may be 1:0.38.

In addition, specifically, the weight ratio of DOP and DINCH is 1:0.1 or more, 0.11 or more, 0.12 or more, 0.13 or more, 0.14 or more, 0.15 or more, 0.16 or more, 0.17 or more, 0.18 or more, 0.19 or more, 0.2 or more, 0.21 or more, It may be 0.22 or more or 0.25 or more, 1: 0.3 or less, 0.29 or less, 0.28 or less, 0.27 or less, 0.26 or less, 0.25 or less, 0.24 or less, 0.23 or less, 0.22 or less, 0.21 or less, 0.2 or less, or 0.15 or less, more specific Thus, the weight ratio of DOP and DINCH may be 1:0.21.

The composition according to one aspect of the present invention may include 0.1 to 3 parts by weight of calcium carbonate based on 100 parts by weight of the polyvinyl chloride resin. Specifically, the composition contains 0.1 part by weight or more, 0.2 part by weight, 0.3 part by weight, 0.4 part by weight, 0.5 part by weight, 0.6 part by weight, or 0.7 part by weight based on 100 parts by weight of polyvinyl chloride resin. parts by weight or more, 0.8 parts by weight or more, 0.9 parts by weight or more, 1 part by weight or more, 1.02 parts by weight or more, 1.04 parts by weight or more, 1.06 parts by weight or more, 1.08 parts by weight or more, 1.1 parts by weight or more, 1.11 parts by weight or more, 1.12 parts by weight or more parts by weight or more, 1.13 parts by weight or more, 1.14 parts by weight or more, 1.15 parts by weight or more, 1.16 parts by weight or more, 1.17 parts by weight or more, 1.18 parts by weight or more, 1.19 parts by weight or more, 1.2 parts by weight or more, 1.21 parts by weight or more, 1.22 parts by weight or more It may contain more than 1.23 parts by weight, more than 1.25 parts by weight, more than 1.5 parts by weight, or more than 2 parts by weight, and less than 3 parts by weight, less than 2.8 parts by weight, less than 2.6 parts by weight, less than 2.4 parts by weight, and less than 2.2 parts by weight. Hereinafter, 2 parts by weight or less, 1.9 parts by weight or less, 1.8 parts by weight or less, 1.7 parts by weight or less, 1.6 parts by weight or less, 1.5 parts by weight or less, 1.4 parts by weight or less, 1.38 parts by weight or less, 1.36 parts by weight or less, 1.34 parts by weight or less. Hereinafter, 1.32 parts by weight or less, 1.3 parts by weight or less, 1.29 parts by weight or less, 1.28 parts by weight or less, 1.27 parts by weight or less, 1.26 parts by weight or less, 1.25 parts by weight or less, 1.24 parts by weight or less, 1.23 parts by weight or less, 1.22 parts by weight or less. Hereinafter, it may contain 1.2 parts by weight or less or 1 part by weight or less. More specifically, the composition may contain 1.23 parts by weight of calcium carbonate based on 100 parts by weight of the polyvinyl chloride resin.

The composition according to one aspect of the present invention may include 1 to 3 parts by weight of an impact modifier based on 100 parts by weight of the polyvinyl chloride resin. Specifically, the composition contains 1 part by weight or more, 1.1 parts by weight, 1.2 parts by weight, 1.3 parts by weight, 1.4 parts by weight, 1.5 parts by weight, or 1.6 parts by weight based on 100 parts by weight of polyvinyl chloride resin. parts by weight or more, 1.7 parts by weight or more, 1.8 parts by weight or more, 1.81 parts by weight or more, 1.82 parts by weight or more, 1.83 parts by weight or more, 1.84 parts by weight or more, 1.85 parts by weight or more, 1.86 parts by weight or more, 1.87 parts by weight or more, 1.88 parts by weight It may contain at least 1.89 parts by weight, at least 1.9 parts by weight, or at least 2 parts by weight, and at most 3 parts by weight, at most 2.9 parts by weight, at most 2.8 parts by weight, at most 2.7 parts by weight, at most 2.6 parts by weight, and at most 2.5 parts by weight. or less, 2.4 parts by weight or less, 2.3 parts by weight or less, 2.2 parts by weight or less, 2.1 parts by weight or less, 2.08 parts by weight or less, 2.06 parts by weight or less, 2.04 parts by weight or less, 2.02 parts by weight or less, 2 parts by weight or less, 1.99 parts by weight or less. Hereinafter, 1.98 parts by weight or less, 1.97 parts by weight or less, 1.96 parts by weight or less, 1.95 parts by weight or less, 1.94 parts by weight or less, 1.93 parts by weight or less, 1.92 parts by weight or less, 1.91 parts by weight or less, 1.9 parts by weight or less, 1.89 parts by weight. Hereinafter, it may contain 1.85 parts by weight or less, 1.8 parts by weight or less, or 1.5 parts by weight or less. More specifically, the composition may include 1.89 parts by weight of an impact modifier based on 100 parts by weight of the polyvinyl chloride resin.

As for the stabilizer according to one aspect of the present invention, the impact modifier may include an acrylic impact modifier (AIM) and methacrylate butadiene stylene (MBS).

The weight ratio of AIM and MBS according to one aspect of the present invention may be 1:0.7 to 0.9. Specifically, the weight ratio of the AIM and MBS may be 1: 0.7 or more, 0.71 or more, 0.72 or more, 0.73 or more, 0.74 or more, 0.75 or more, 0.76 or more, 0.77 or more, 0.78 or more, or 0.8 or more, and 1: 0.9 or less, 0.89 or more. It may be 0.88 or less, 0.87 or less, 0.86 or less, 0.85 or less, 0.84 or less, 0.83 or less, 0.82 or less, 0.81 or less, 0.8 or less, 0.79 or less, 0.78 or less, 0.76 or less, or 0.75 or less. More specifically, the AIM and The weight ratio of MBS may be 1:0.78.

The composition according to one aspect of the present invention may include 0.1 to 0.4 parts by weight of filler based on 100 parts by weight of the polyvinyl chloride resin. Specifically, the composition contains 0.1 part by weight or more, 0.11 part by weight, 0.12 part by weight, 0.13 part by weight, 0.14 part by weight, 0.15 part by weight, or 0.16 part by weight based on 100 parts by weight of polyvinyl chloride resin. It may contain more than 0.17 parts by weight, more than 0.18 parts by weight, more than 0.19 parts by weight, more than 0.2 parts by weight, more than 0.21 parts by weight, more than 0.22 parts by weight, more than 0.23 parts by weight, more than 0.25 parts by weight, or more than 0.3 parts by weight, , 0.4 parts by weight or less, 0.39 parts by weight or less, 0.38 parts by weight or less, 0.37 parts by weight or less, 0.36 parts by weight or less, 0.35 parts by weight or less, 0.34 parts by weight or less, 0.33 parts by weight or less, 0.32 parts by weight or less, 0.31 parts by weight or less. , 0.3 parts by weight or less, 0.29 parts by weight or less, 0.28 parts by weight or less, 0.27 parts by weight or less, 0.25 parts by weight or less, or 0.2 parts by weight or less. More specifically, the composition may contain 100 parts by weight of polyvinyl chloride resin. It may contain 0.27 parts by weight of filler.

The composition according to one aspect of the present invention may include 0.1 to 0.2 parts by weight of fat sugar based on 100 parts by weight of polyvinyl chloride resin. Specifically, the composition contains 0.1 part by weight or more, 0.11 part by weight, 0.12 part by weight, 0.13 part by weight, 0.132 part by weight, 0.134 part by weight, or 0.136 part by weight, based on 100 parts by weight of polyvinyl chloride resin. or more, 0.138 parts by weight or more, 0.14 parts by weight or more, 0.141 parts by weight or more, 0.142 parts by weight or more, 0.143 parts by weight or more, 0.144 parts by weight or more, 0.145 parts by weight or more, 0.146 parts by weight or more, 0.147 parts by weight or more, 0.148 parts by weight. It may contain more than 0.15 parts by weight, more than 0.16 parts by weight, more than 0.17 parts by weight, or more than 0.18 parts by weight, and less than or equal to 0.2 parts by weight, less than or equal to 0.19 parts by weight, less than or equal to 0.18 parts by weight, less than or equal to 0.17 parts by weight, and less than or equal to 0.16 parts by weight. , 0.158 parts by weight or less, 0.156 parts by weight or less, 0.154 parts by weight or less, 0.152 parts by weight or less, 0.15 parts by weight or less, 0.149 parts by weight or less, 0.148 parts by weight or less, 0.14 parts by weight or less, or 0.12 parts by weight or less, More specifically, the composition may include 0.148 parts by weight of fat sugar based on 100 parts by weight of polyvinyl chloride resin.

According to one embodiment of the present invention, the composition according to one aspect of the present invention contains a polyvinyl chloride resin, a stabilizer, calcium carbonate, an impact modifier, a filler, and fat sugar in a specific content, and in particular DOP, DOTP, and DINCH belonging to the stabilizer. By including AIM and MBS, which belong to impact modifiers, in a specific weight ratio, it has excellent tensile yield strength, no deformation or cracking occurred in hot pressure creep tests and flatness tests, and it has a high Vicat softening temperature, and lead Not only is it not detected, but in the immersion test, the degree of immersion in water, sodium chloride solution, sulfuric acid solution, nitric acid solution, and sodium hydroxide solution is very low, resulting in excellent physical properties (Experimental Example and Table 3).

In another aspect, the present invention provides a rigid polyvinyl chloride pipe manufactured using the composition for rigid polyvinyl chloride pipe. The description of the composition for rigid polyvinyl chloride pipes also applies to these pipes.

The pipe according to one aspect of the present invention has a test result according to KS M 3404: 2021, (A) tensile yield strength of 50 MPa or more; (B) No deformation as a result of hot pressure creep test; (C) Vicat softening temperature of 81°C or higher; (C) Flatness test results show no cracks or ruptures; (D) Lead (Pb) is not detected; and (E) an immersion test result of one or more selected from the group consisting of water, sodium chloride solution, sulfuric acid solution, nitric acid solution, and sodium hydroxide solution of 0.15 mg/cm ² or less; It may have one or more physical properties selected from the group consisting of .

Hereinafter, the configuration of the present invention and its effects will be described in more detail through specific examples and experimental examples. However, these examples are for illustrating the present invention in more detail, and the scope of the present invention is not limited to these examples.

[Manufacture example] Manufacture of hard polyvinyl chloride pipe

The compositions for hard polyvinyl chloride pipes of Examples and Comparative Examples 1 and 2 were prepared with the ingredients and contents shown in Tables 1 and 2 below, and then extruded to produce drain pipes. At this time, when compared to the Example, Comparative Examples 1 and 2 have the same weight ratio of DOP, DOTP, and DINCH, and the weight ratio of AIM and MBS as the Example, but the content of each component is different from the Example. In addition, in Comparative Examples 3 to 6, the content of each component was the same or similar to the Example, but the weight ratio of DOP, DOTP, and DINCH (Comparative Examples 3 and 4), or the weight ratio of AIM and MBS (Comparative Examples 5 and 6) was carried out. It is different from the example.

Unit: parts by weight ingredient Example Comparative Example 1 Comparative Example 2 polyvinyl chloride resin 100 100 100 stabilizator Dioctyl phthalate (DOP) 0.19 0.05 0.34 Dioctyl terephthalate (DOTP) 0.072 0.02 0.13 1,2-Cyclohexane dicarboxylic acid diisononyl ester (DINCH) 0.04 0.01 0.07 calcium carbonate 1.23 3.2 0.05 Shock
adjuvant Acrylic impact modifier (AIM) 0.152 0.5 1.97 Methacrylate Butadiene Styrene (MBS) 0.118 0.4 1.53 filler 0.27 0.06 0.42 Jidang 0.148 0.08 0.24

Unit: parts by weight ingredient Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 polyvinyl chloride resin 100 100 100 100 stabilizator Dioctyl phthalate (DOP) 0.19 0.21 0.19 0.19 Dioctyl terephthalate (DOTP) 0.048 0.16 0.072 0.072 1,2-Cyclohexane dicarboxylic acid diisononyl ester (DINCH) 0.65 0.011 0.04 0.04 calcium carbonate 1.23 1.23 1.23 1.23 Impact modifier Acrylic impact modifier (AIM) 0.152 0.152 0.152 0.2 Methacrylate Butadiene Styrene (MBS) 0.118 0.118 0.1 0.2 filler 0.27 0.27 0.27 0.27 Jidang 0.148 0.148 0.148 0.148

[Experimental example] Physical property test

Tensile yield strength (KS M 3404: 2021), hot pressure creep (straight pipe part) (60°C, 10.0 MPa, 1,000 h)(KS M 3404:2021), Vicat softening temperature (KS M 3404:2021), flatness (KS M 3404:2021), quantity (Pb) (KS M 3404:2021(AAS)), and water , an immersion test (KS M 3404: 2021) was performed on each of sodium chloride solution, sulfuric acid solution, nitric acid solution, and sodium hydroxide solution, and the results are shown in Table 3 below.

Example Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Tensile Yield Strength (MPa) 50.5 52 43 49 48 51 41 Hot pressure creep more
doesn't exist more
doesn't exist more
doesn't exist There is variation more
doesn't exist more
doesn't exist more
doesn't exist Vicat softening temperature (℃) 83 73 81 76 77 74 75 flatness more
doesn't exist with cracks with cracks more
doesn't exist with cracks with cracks more
doesn't exist Quantitative amount (Pb) (wt%) detection
no detection
no detection
no detection
no detection
no detection
no detection
no Immersion test
(mg/cm ² ) water 0.09 0.2 0.15 0.1 0.11 0.13 0.12 sodium chloride solution 0.11 0.21 0.18 0.14 0.13 0.15 0.13 sulfuric acid solution 0.12 0.23 0.19 0.15 0.15 0.16 0.15 nitric acid solution 0.13 0.25 0.21 0.17 0.17 0.16 0.14 sodium hydroxide solution 0.12 0.24 0.19 0.15 0.14 0.15 0.13

As shown in Table 3, the example had excellent tensile yield strength, did not deform or crack in the hot pressure creep test and flatness test, had a high Vicat softening temperature, and no lead was detected. In addition, in the immersion test, the degree of immersion in water, sodium chloride solution, sulfuric acid solution, nitric acid solution, and sodium hydroxide solution was all very low. On the other hand, Comparative Examples 1 and 2, in which the content of each component was slightly different from the Example, had lower Vitac softening temperature, cracks occurred in the flatness test, or lower tensile yield strength, and had inferior tensile strength compared to the Example. And it was found. In addition, compared to the Examples, Comparative Examples 3 to 6 in which the weight ratios of DOP, DOTP and DINCH, or the weight ratios of AIM and MBS are different, also have lower tensile yield strength or Bitark softening temperature or cracks in the flatness test, etc. , it was confirmed that the physical properties were poorer compared to the examples.

Through this, the composition for rigid polyvinyl chloride pipes according to an aspect of the present invention and pipes manufactured using the composition have excellent tensile yield strength by containing specific components in a specific content or specific weight ratio and can be used in hot pressure creep tests and flatness. No deformation or cracking occurred in the test, and it has a high Vicat softening temperature, and not only was no lead detected, but also water, sodium chloride solution, sulfuric acid solution, nitric acid solution, and sodium hydroxide solution were all immersed in the immersion test. is very low, which has the effect of having excellent physical properties.

Claims (3)

A composition for rigid polyvinyl chloride pipes,
The composition contains a polyvinyl chloride resin, and further contains 0.302 parts by weight of a stabilizer, 1.23 parts by weight of calcium carbonate, 1.89 parts by weight of an impact modifier, 0.148 parts by weight of fat sugar, and calcium carbonate and fat sugar based on 100 parts by weight of the polyvinyl chloride resin. Contains 0.27 parts by weight excluding fillers,
The stabilizers include dioctyl phthalate (DOP), dioctyl terephthalate (DOTP), and 1,2-cyclohexane dicarboxylic acid diisononyl ester. DINCH) in a weight ratio of 1:0.38:0.21,
The impact modifier is a composition for a rigid polyvinyl chloride pipe, comprising an acrylic impact modifier (AIM) and methacrylate butadiene styrene (MBS) at a weight ratio of 1:0.78. delete delete