Window sash composition having excellent heat resistance

Abstract

The present invention relates to a window sash composition having excellent heat resistance. In one embodiment, the window sash composition comprises chlorinated polyvinyl chloride and a silicone-acrylic impact modifier, wherein the silicone-acrylic impact modifier comprises a core containing a siloxane polymer and a shell containing a (meth)acrylic polymer.

Description

composition for windows and doors with excellent heat resistance

[0001] The present invention relates to a composition for windows and doors with excellent heat resistance.

[0002] Windows and doors refer to window frames and windows installed in buildings. As windows and doors are frequently opened and closed to facilitate indoor lighting and air circulation, high mechanical properties are required.

[0003] Conventionally, windows and doors were manufactured using metals such as aluminum or resins such as polyvinyl chloride. However, conventional polyvinyl chloride windows and doors lacked heat resistance, causing the exterior of the window to warp during prolonged high temperatures in the summer, and severe problems arose regarding the detachment and separation of the window frame due to high-temperature thermal deformation. Additionally, in winter, windows and doors made of metal materials such as aluminum (Al) had high thermal conductivity and lacked thermal insulation performance, leading to problems such as indoor condensation and mold growth.

[0004] In addition, windows require complex shapes, such as having multiple thin ribs formed at the ends for fixing and opening / closing. When manufacturing windows by extruding a resin composition, excellent extrusion moldability is required because the resin composition must be rapidly gelled and extruded to fill a mold with a complex shape in order to prevent shape defects.

[0005] Therefore, there is a need for research on window and door compositions that have excellent moldability while possessing enhanced thermal insulation and heat resistance properties.

[0006] The background technology related to the present invention is disclosed in Japanese Patent Publication No. JP 2017-057399 (published on March 23, 2017; Title of invention: Thermally expandable refractory resin composition).

[0007] One objective of the present invention is to provide a composition for windows and doors that has excellent heat resistance and effectively prevents warping and thermal deformation at high temperatures.

[0008] Another objective of the present invention is to provide a composition for windows and doors having excellent tensile strength, heat resistance, weather resistance, discoloration resistance, thermal insulation, and dimensional stability.

[0009] Another objective of the present invention is to provide a composition for windows and doors that has excellent appearance and excellent extrudability and processability.

[0010] Another objective of the present invention is to provide a method for manufacturing a window frame molded body using the above-described window frame composition.

[0011] Another objective of the present invention is to provide a window frame molded body manufactured using the above-described window frame composition.

[0012] One aspect of the present invention relates to a composition for windows and doors. In one embodiment, the composition for windows and doors comprises chlorinated polyvinyl chloride and a silicone-acrylic impact modifier, wherein the silicone-acrylic impact modifier comprises a core comprising a siloxane polymer and a shell comprising a (meth)acrylic polymer.

[0013] In one embodiment, the composition may include 100 parts by weight of the chlorinated polyvinyl chloride and 3 to 15 parts by weight of a silicone-acrylic impact modifier.

[0014] In one embodiment, the chlorinated polyvinyl chloride contains 60 to 75 weight percent chlorine and may have a degree of polymerization of 800 to 1200.

[0015] In one embodiment, the siloxane polymer comprises polydialkylsiloxane, and the (meth)acrylic polymer may comprise polyalkyl (meth)acrylate.

[0016] In one embodiment, the silicone-acrylic impact modifier may include the (meth)acrylic polymer and the siloxane polymer in a weight ratio of 1:2 to 1:10.

[0017] In one embodiment, the silicone-acrylic impact modifier may have an average particle size of 0.1 to 2 μm.

[0018] In one embodiment, the window and door composition has a tensile strength of 500 kgf / cm² measured according to KS F 5602. 2 The above and the Vicat softening point (VSP, 5kgf) may be 110℃ or higher.

[0019] In one embodiment, the above-described window frame composition may have a gelling time of 180 seconds or less measured at 180°C and a gelling stabilization torque of 25 to 35 N·m.

[0020] Another aspect of the present invention relates to a method for manufacturing a window frame molded body using the above-described window frame composition. In one embodiment, the method for manufacturing the window frame molded body comprises the steps of kneading the above-described window frame composition and extruding the kneaded window frame composition.

[0021] In one embodiment, the extrusion may be carried out at 180 to 220°C.

[0022] Another aspect of the present invention relates to a window frame molded article manufactured using the above-described window frame composition. In one embodiment, the window frame molded article is formed from the above-described window frame composition and has a structure in which a silicone-acrylic impact modifier with a core-shell structure is dispersed in a continuous phase of chlorinated polyvinyl chloride.

[0023] In one embodiment, the window molding body may include a sash, a louver shutter, or a folding door.

[0024] The window frame composition of the present invention has excellent heat resistance, which effectively prevents warping and thermal deformation of the window frame at high temperatures, prevents separation and detachment of the window frame due to thermal deformation, has excellent thermal insulation to prevent indoor condensation, has excellent tensile strength, heat resistance, weather resistance, discoloration resistance, and dimensional stability, has an excellent appearance, minimizes gelling time, and has excellent extrudability and processability by having a faster gelling time and lower extrusion load compared to the pipe composition.

[0025] FIG. 1 shows a window frame molded body according to one embodiment of the present invention.

[0026] In describing the present invention, if it is determined that a detailed description of related known technologies or configurations could unnecessarily obscure the essence of the invention, such detailed description will be omitted.

[0027] Furthermore, the terms described below are defined in consideration of their functions in the present invention; since these may vary depending on the intentions or practices of the user or operator, their definitions should be based on the content throughout this specification describing the present invention.

[0028]

[0029] composition for windows and doors

[0030] One aspect of the present invention relates to a composition for windows and doors. In one embodiment, the composition for windows and doors comprises chlorinated polyvinyl chloride and a silicone-acrylic impact modifier, wherein the silicone-acrylic impact modifier comprises a silicone core and a (meth)acrylate shell formed on the outer surface of the silicone core.

[0031] Hereinafter, the components of the above-mentioned window and door composition will be described in detail.

[0032]

[0033] Chlorinated polyvinyl chloride

[0034] The above-mentioned chlorinated polyvinyl chloride (CPVC) has a higher chlorine content compared to polyvinyl chloride, so its mechanical properties, heat resistance, and chemical resistance may be relatively superior.

[0035] The above-mentioned chlorinated polyvinyl chloride may be of a conventional type. For example, the above-mentioned chlorinated polyvinyl chloride may be one prepared by including a step of chlorinating a vinyl chloride-based resin by irradiating ultraviolet light into a reactor into which chlorine has been introduced, but is not limited thereto.

[0036] In one embodiment, the chlorinated polyvinyl chloride may contain about 60 to 75 weight percent of chlorine. Under these conditions, the chlorinated polyvinyl chloride has excellent heat resistance and thermal stability, and is effective in preventing warping and thermal deformation of the window frame at high temperatures, thereby preventing separation and detachment of the window frame due to thermal deformation. For example, the chlorinated polyvinyl chloride may contain about 66 to 70 weight percent or about 70 to 72 weight percent of chlorine.

[0037] In one embodiment, the chlorinated polyvinyl chloride may have a degree of polymerization of approximately 800 to 1200. For example, the degree of polymerization of the chlorinated polyvinyl chloride can be measured according to the JIS K 6720-2 standard. Under the above degree of polymerization conditions, the heat resistance and mechanical strength of the window frame composition may be excellent, and the extrusion processability may be excellent by having a fast gelling time and a low extrusion load. For example, the chlorinated polyvinyl chloride may have a degree of polymerization of approximately 950 to 1050.

[0038]

[0039] Silicone-acrylic impact modifier

[0040] The above silicone-acrylic impact modifier may be included to reinforce the heat resistance, impact resistance, and weather resistance of the above window and door composition. The above silicone-acrylic impact modifier comprises a core comprising a siloxane polymer and a shell comprising a (meth)acrylic polymer.

[0041] In the present invention, (meth)acrylic may mean acrylic and / or metaacrylic.

[0042] In one embodiment, the siloxane polymer may include polydialkylsiloxane. When the siloxane polymer is included, heat resistance, impact resistance, and weather resistance may be excellent. For example, the polydialkylsiloxane may include polydimethylsiloxane.

[0043] In one embodiment, the (meth)acrylic polymer may include a polyalkyl (meth)acrylate. When the polyalkyl (meth)acrylate is included, the impact resistance and weather resistance may be excellent. For example, the polyalkyl (meth)acrylate may include one or more of polymethyl (meth)acrylate, polyethyl (meth)acrylate, polypropyl (meth)acrylate, polybutyl (meth)acrylate, polyhexyl (meth)acrylate, and polyoctyl (meth)acrylate.

[0044] In one embodiment, the impact modifier may include the (meth)acrylic polymer and the siloxane polymer in a weight ratio of about 1:2 to 1:10. When included in the above weight ratio, the heat resistance, impact resistance, and weather resistance of the window frame composition may be excellent, while the mixability, moldability, and extrusion processability may be excellent. For example, the impact modifier may include the (meth)acrylic polymer and the siloxane polymer in a weight ratio of about 1:3 to 1:9, about 1:3 to 1:8, or about 1:4 to 1:7.

[0045] In one embodiment, the impact modifier may have an average particle size of about 0.1 to 2 μm. Under these conditions, the dispersibility and mixability are excellent, the heat resistance of the window frame composition is excellent, and the extrusion processability is excellent.

[0046] In one embodiment, the silicon core may have an average particle size of about 0.05 to 1.5 μm. Under these conditions, the dispersibility and mixability are excellent, the heat resistance of the window frame composition is excellent, and the extrusion processability is excellent.

[0047] In one embodiment, the (meth)acrylate shell may have a thickness of about 0.05 to 1 μm. Under these conditions, the dispersibility and mixability are excellent, the heat resistance of the window frame composition is excellent, and the extrusion processability is excellent.

[0048] In one embodiment, the window frame composition may comprise about 100 parts by weight of the chlorinated polyvinyl chloride and about 3 to 15 parts by weight of a silicone-acrylic impact modifier. Under the above content conditions, the window frame composition may have excellent mixability and dispersibility, excellent extrusion processability, and excellent appearance, tensile strength, weather resistance, and heat resistance. For example, the silicone-acrylic impact modifier may be included in about 5 to 12 parts by weight or about 5 to 10 parts by weight per 100 parts by weight of the chlorinated polyvinyl chloride.

[0049] In one embodiment, the above-described window frame composition may have a tensile strength of about 50 MPa or more and a vicat softening temperature (VSP, 5 kgf) of about 110°C or more, as measured according to KS F 5602 standards. Under these conditions, the durability and heat resistance are excellent, so the effect of preventing bending and thermal deformation of the window frame at high temperatures may be excellent. For example, the above-described window frame composition may have a tensile strength of about 50 to 60 MPa and a vicat softening temperature (VSP, 5 kgf) of about 110 to 120°C, as measured according to KS F 5602 standards.

[0050] In one embodiment, the above window frame composition may have an impact strength of about 10 kg·cm / cm or more as measured according to KS F 5602 standards. Under the above conditions, durability and impact resistance may be excellent. For example, the above window frame composition may have an impact strength of about 10 to 50 kg·cm / cm as measured according to KS F 5602 standards.

[0051] In one embodiment, the above-described window frame composition may have a gelling time of about 180 seconds or less measured at 180°C and a gelling stabilization torque of about 25 to 35 N·m. For example, the gelling time and gelling stabilization torque of the above-described window frame composition can be measured using a Brabender Plastomill under conditions of 180°C and 30 rpm. Under these conditions, the composition has excellent mixability and dispersibility and excellent extrusion processability, allowing for the easy manufacture of a window frame molded body with a complex shape during extrusion and preventing molding defects. For example, the above-described window frame composition may have a gelling time of about 172 to 178 seconds measured at 180°C and a gelling stabilization torque of about 28 to 34 N·m.

[0052]

[0053] Method for manufacturing a window frame molded body using a window frame composition

[0054] Another aspect of the present invention relates to a method for manufacturing a window frame molded body using the above-described window frame composition. In one embodiment, the method for manufacturing the window frame molded body comprises the steps of kneading the above-described window frame composition and extruding the kneaded window frame composition.

[0055] For example, the above extrusion can be carried out using a single-screw, twin-screw, or multi-screw extruder.

[0056] In one embodiment, the mixing may be carried out at approximately 100 to 140°C. Under these conditions, the mixability and dispersibility of the window frame composition are excellent, and the extrusion moldability may be excellent.

[0057] In one embodiment, the extrusion may be carried out at approximately 180 to 220°C. When extruded under these conditions, the mechanical properties of the window frame molded body can be excellent while preventing shape defects.

[0058]

[0059] A window / door molded body manufactured using a window / door composition

[0060] Another aspect of the present invention relates to a window frame molded article manufactured using the above-described window frame composition. In one embodiment, the window frame molded article is formed from the above-described window frame composition and has a structure in which a silicone-acrylic impact modifier with a core-shell structure is dispersed in a continuous phase of chlorinated polyvinyl chloride.

[0061] The above-mentioned chlorinated polyvinyl chloride and silicone-acrylic impact modifiers may be the same as those described above.

[0062] FIG. 1 shows a window frame molded body according to one embodiment of the present invention. Referring to FIG. 1, the window frame molded body may include a sash as in FIG. 1(a), a louver shutter as in FIG. 1(b), or a folding door as in FIG. 1(c).

[0063] Meanwhile, since window molding bodies (products) are exposed to both the internal and external environments of a building due to their characteristics and are exposed to sunlight and various climatic influences outdoors for a long period, the present invention incorporates weather resistance (climate resistance) requirements that conventional window compositions do not possess.

[0064] Conventional window frame compositions exhibit discoloration and degradation of physical properties in a short period due to the low weather resistance of MBS and CPE impact modifiers used in PVC / CPVC, whereas the present invention improves weather resistance by applying a silicone acrylic impact modifier (AIM (Acrylic Impact Modifier, Si Core)).

[0065] The window frame composition of the present invention has excellent heat resistance, which effectively prevents warping and thermal deformation of the window frame at high temperatures, prevents separation and detachment of the window frame due to thermal deformation, has excellent thermal insulation to prevent indoor condensation, has excellent tensile strength, weather resistance, discoloration resistance, and dimensional stability, has an excellent appearance, minimizes gelling time, and has excellent extrudability and processability by having a fast gelling time and low extrusion load.

[0066]

[0067] Hereinafter, the structure and operation of the present invention will be explained in more detail through preferred embodiments. However, these are presented as preferred examples of the present invention and should not be interpreted in any way as limiting the present invention. Details not described herein can be sufficiently technically inferred by those skilled in the art, so such descriptions will be omitted.

[0068]

[0069] Examples and Comparative Examples

[0070] The components used in the above examples and comparative examples are as follows.

[0071] (A) Chlorinated polyvinyl chloride with a chlorine content of 67 wt% and a degree of polymerization of 1000 as measured according to JIS K 6720-2 was used.

[0072] (B1) A silicone-acrylic impact modifier comprising a core containing a siloxane polymer (polydimethylsiloxane) and a shell containing a (meth)acrylic polymer (polymethyl methacrylate) was used (a silicone rubber core with an average particle size of 0.05 to 1.5 μm and a polymethacrylate shell with a thickness of 0.05 to 1.0 μm).

[0073] (B2) An acrylic (polymethyl methacrylate) (AIM) impact modifier was used (an acrylic rubber core with an average particle size of 0.05 to 1.5 μm and an acrylic shell with a thickness of 0.05 to 1.0 μm).

[0074] (B3) Methyl methacrylate-butadiene-styrene rubber (MBS) impact modifier (butadiene-styrene rubber core with an average particle size of 0.05–1.5 μm and methyl methacrylate shell with a thickness of 0.05–1.0 μm) was used.

[0075] (B4) Chlorinated polyethylene (CPE) was used as an impact modifier.

[0076]

[0077] Examples 1–3 and Comparative Examples 1–3

[0078] A window frame molded specimen was prepared by applying the components and content of Table 1 below to a window frame composition, mixing it at 100–140°C, and then extruding it at 180–220°C.

[0079]

[0080]

[0081] Experimental Example

[0082] The above Examples 1 to 3 and Comparative Examples 1 to 3 were evaluated as follows, and the results are shown in Table 2 below.

[0083] (1) Gelling time (sec), gelling torque (N·m), gelling stabilization torque (N·m), T-die extrusion load (N·m) and T-die extrusion amount (g / min): Measured using a Brabender Plastomill at 180°C and 30 rpm for 55 g of the above window frame composition.

[0084] (2) Thermal stability (min): For the compositions of the example and comparative example, a sheet-shaped specimen with a thickness of 2 mm was prepared by rolling (170°C, 3 min) and pressing (180°C, 10 min). The specimen was cut into a strap shape with a size of 15 mm Y 480 mm and mounted in an oven at 190°C. The oven was set so that the specimen mounted inside the oven was ejected out of the oven at a speed of 15 mm / 5 min. The heat resistance time (min) was calculated by measuring the time it took for the color to change through observation of discoloration or carbonization of the ejected part.

[0085] (3) Tensile strength (MPa): Measured according to KS F 5602 standards.

[0086] (4) Impact strength (kg·cm / cm): Measured according to KS F 5602 standards.

[0087] (5) Vicat softening point (VSP, °C, 5 kgf): Measured according to KS F 5602 standards.

[0088] (6) Weather resistance (YI): Weather resistance was evaluated for the examples and comparative examples by measuring the yellow index (YI) according to ASTM E313 and ASTM G 154 standards.

[0089]

[0090]

[0091] Referring to the results of the above examples and comparative examples, it was found that Examples 1 to 3 of the present invention had excellent mechanical properties such as tensile strength and impact strength, excellent heat resistance and weather resistance, and had a low gelling time, which minimized the extrusion load and showed excellent extrusion moldability.

[0092] On the other hand, Comparative Examples 1 to 3, which applied an impact modifier different from that of the present invention, showed significantly reduced weather resistance compared to Examples 1 to 3, reduced thermal stability, and increased gelling time, which resulted in reduced extrusion moldability.

[0093]

[0094] The present invention has been described above with reference to embodiments. Those skilled in the art will understand that the present invention may be implemented in modified forms without departing from the essential characteristics of the invention. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the invention is defined by the claims, not by the foregoing description, and all variations within the scope of equivalents should be interpreted as being included in the invention.

[0095] A method for manufacturing cresol according to one embodiment of the present invention is industrially applicable.

Claims

1. Includes chlorinated polyvinyl chloride and silicone-acrylic impact modifiers, The above silicone-acrylic impact modifier is a composition for windows and doors comprising a core comprising a siloxane polymer and a shell comprising a (meth)acrylic polymer.

2. The composition for windows and doors according to claim 1, wherein the composition comprises 100 parts by weight of the chlorinated polyvinyl chloride and 3 to 15 parts by weight of a silicone-acrylic impact modifier.

3. A window frame composition according to claim 1, wherein the chlorinated polyvinyl chloride contains 60 to 75 weight percent chlorine and has a degree of polymerization of 800 to 1200.

4. In claim 1, the siloxane polymer comprises polydialkylsiloxane, and The above (meth)acrylic polymer is a composition for windows and doors comprising polyalkyl (meth)acrylate.

5. A composition for windows and doors according to claim 1, wherein the silicone-acrylic impact modifier comprises the (meth)acrylic polymer and the siloxane polymer in a weight ratio of 1:2 to 1:

10.

6. In claim 1, the silicone-acrylic impact modifier is a window frame composition having an average particle size of 0.1 to 2 μm.

7. The window and door composition according to claim 1, wherein the window and door composition has a tensile strength of 50 MPa or more and a Vicat softening point (VSP, 5 kgf) of 110℃ or more as measured in accordance with KS F 5602.

8. The window / door composition according to claim 1, wherein the gelling time measured at 180°C is 180 seconds or less and the gelling stabilization torque is 25 to 35 N·m.

9. A step of mixing a composition for windows and doors according to any one of paragraphs 1 to 8, and A method for manufacturing a window frame molded body, comprising the step of extruding the above-mentioned compounded window frame composition.

10. A method for manufacturing a window frame molded body according to claim 9, wherein the extrusion is performed at 180 to 220°C.

11. Formed from a window and door composition of any one of claims 1 to 8, and A window frame molded body having a structure in which a core-shell silicone-acrylic impact modifier is dispersed in a continuous phase of chlorinated polyvinyl chloride.

12. In Clause 11, the above-mentioned window molding body is a window molding body including a sash, a louver shutter, or a folding door.

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