KR20120065547A - Enviroment-friendly window frame composition comprising inorganic filler and fiber and manufacturing method thereof - Google Patents

Abstract

PURPOSE: An environmentally friendly synthetic resin composition for fittings is provided to enhance mechanical property and workability and to provide fittings with excellent durability at low cost. CONSTITUTION: An environmentally friendly synthetic resin composition for fittings comprises 100 parts by weight of thermoplastic resin which includes acrylic rubber, 3-10 parts by weight of organic filler, and 1-10 part by weight of fibrous reinforcing agent. The fibrous reinforcing agent is more than one or two kinds which is selected from glass fiber, wallastonite, sepiolite, and mica. The fibrous reinforcement has a needle-like structure. A fiberscope of the fibrous reinforcement is 20-100 micro meters, an aspect ratio is 10-20:1, and pH is 7-9. The inorganic filler is one or two kinds which is selected from calcium carbonate(CaCO3), kaolin, clay, silica, and talc. An average diameter of the inorganic filler is 2-15 micro meters and pH is 7-9.

Description

ENVIROMENT-FRIENDLY WINDOW FRAME COMPOSITION COMPRISING INORGANIC FILLER AND FIBER AND MANUFACTURING METHOD THEREOF}

The present invention relates to an environment-friendly window material composition and a method for manufacturing the same, and more particularly, an environment-friendly window material composition comprising a composition for thermoplastic profiles and an environmentally friendly inorganic material having excellent weather resistance, including acrylic rubber which can be used as the window material. It relates to a manufacturing method.

Polyvinyl chloride (PVC) resin, which has been widely used for building materials such as window frames and windows, has a problem of generating a large amount of environmentally harmful substances such as dioxins during combustion and extrusion processes, and cadmium stearate which is used as a heat stabilizer. Heavy metal ions such as Cd-ST) and lead stearate (Pb-St) are also regulated by acting as human hormone disruptors. Accordingly, development of environmentally friendly materials that can replace polyvinyl chloride (PVC) continues.

Synthetic resin composition of acrylic rubber-styrene monomer-butadiene rubber-vinyl cyan monomer resin copolymer and styrene-based polymer having high molecular weight and dispersibility. The resin composition using a vinyl cyan-type copolymer is disclosed. However, these products have solved the environmental problems caused by polyvinyl chloride (PVC) resin, but has been difficult to replace low-cost PVC resin due to high manufacturing costs.

Accordingly, there is a continuing demand for new windows and doors products that can secure mechanical properties, workability, and processability that should be inexpensive yet have window shape members.

The problem to be solved in the present invention includes environmentally harmful substances, but excellent resin properties for building materials, such as new windows, window frames that can replace polyvinyl chloride (PVC) having excellent merit and low-cost merit To provide.

Another problem to be solved by the present invention includes environmentally harmful substances, but can replace polyvinyl chloride (PVC) having excellent window material properties and low cost, and can be produced in the production facilities of PVC in the industry It is to provide a resin composition for manufacturing building materials such as new windows, window frames.

It is another object of the present invention to provide an environment-friendly thermoplastic synthetic resin composition for window frames or window frames, including inorganic fillers and fiber reinforcement, but excellent mechanical properties and processability.

In order to solve the above problems, the present invention is characterized by comprising 3-10 parts by weight of the inorganic filler and 1-10 parts by weight of the fiber reinforcing agent in 100 parts by weight of the thermoplastic resin containing the acrylic rubber.

In the present invention, the acrylic rubber is used as an impact modifier of the thermoplastic resin, the acrylic rubber is a crosslinked rubber so that one or more acrylic monomers absorb the impact and exhibit the properties of the rubber to form an independent domain in the matrix resin it means.

In the present invention, the thermoplastic resin is composed of an acrylic rubber and a matrix resin in which the acrylic rubber is dispersed, and the matrix resin has compatibility with the acrylic rubber and is good in hardness, tensile strength, and tear strength required for window materials. Styrene-based resin, more preferably styrene-vinyl cyan-based copolymer may be used to have physical properties.

In the practice of the present invention, the acrylic rubber may be a rubber having a low temperature Tg as the main component of the acrylic monomer in the range of -10 to -20 ℃, preferably an acrylic monomer having 2 to 8 carbon atoms, for example alkylacryl Rate monomers, preferably ethyl acrylate, butyl acrylate, ethyl hexyl acrylate, and the like, even more preferably butyl acrylate.

In the practice of the present invention, the acrylic rubber is a graft acrylic rubber graft-polymerized with a high Tg resin such as styrene, acrylonitrile, methyl methacrylate, and the like to improve the kneading property with the matrix resin. Manufactured and used.

In the practice of the present invention, the graft acrylic rubber is a resin graft copolymerized with styrene and vinyl cyan monomers in order to enhance kneading with the styrene-vinyl cyan copolymer used as the matrix resin.

In a preferred embodiment of the present invention, the graft acrylic rubber may be prepared by emulsion polymerization, first polymerizing the acrylic monomer to prepare a rubbery polymer latex, and then vinyl cyan monomer-styrene monomer, preferably acrylic Prepared by graft polymerization of nitrile-styrene monomers.

The graft acrylic rubber is an acrylic monomer, for example, an alkyl acrylate monomer having 2 to 8 carbon atoms, and preferably ethyl acrylate, butyl acrylate, ethyl hexyl acrylate, etc. to prepare a rubbery polymer latex. And even more preferably butylacrylate.

The acrylic monomer for preparing the rubbery polymer latex is mixed with a small amount of copolymerizable monomer, preferably 20 wt% or less, more preferably 15 wt% or less, and even more preferably 10 wt% or less. Particles can be produced, for example monomers such as butadiene, styrene. The acrylic monomer may further include a small amount of a multifunctional acrylate monomer for graft polymerization of the acrylic monomer.

In the present invention, the graft acrylic rubber may be composed of 50-80 parts by weight of acrylic rubber and 20-50 parts by weight of a styrene monomer and vinyl cyan monomer mixture, wherein the styrene-based monomer and vinyl cyan monomer are 80 It may be mixed in a weight ratio of: 20- 60:40.

In the present invention, the thermoplastic resin including the acrylic rubber may further include butadiene-based rubber so as to adjust the impact strength according to the use environment of the window material, preferably comprising a monomer constituting the matrix. Butadiene graft bodies grafted with monomers. In one embodiment of the invention, the graft butadiene rubber is a copolymer resin consisting of 40-80% by weight of butadiene rubber and 20-60% by weight of monomers styrene and acrylonitrile mixed in a weight ratio of 6: 4-8: 2 to be.

In a preferred embodiment of the present invention, the butadiene-based rubber is used in 20% by weight, preferably 10-15% by weight of the total rubber including acrylic rubber and butadiene rubber to prevent excessive weather resistance Good to do.

 In the present invention, the matrix resin constituting the thermoplastic resin is preferably a styrene-vinyl cyan-based copolymer.

In the present invention, the styrene-based monomer may be used as an aromatic vinyl monomer, styrene, alpha-methyl styrene, para-methyl styrene, vinyl toluene and a mixture of two or more thereof, preferably styrene. In the present invention, the vinyl cyanide monomer includes acrylonitrile, methacrylonitrile, and the like, and preferably acrylonitrile.

In the present invention, the styrene-vinyl cyan copolymer is a copolymer of a styrene monomer and a vinyl cyan monomer, preferably a styrene-acrylonitrile copolymer.

In the practice of the present invention, the styrenic vinyl cyanic monomer is preferably used a product having a weight average molecular weight of 130,000 ~ 400,000 so as to meet the physical properties required for the profile, more preferably the weight average molecular weight Low molecular weight products with a wide ratio of number average molecular weight and weight average molecular weight (Mn / Mw) of about 2.5 to 5.5 so that the extruder can be easily extruded to an extruder having an average temperature of 200 ° C. or less, such as a PVC extruder. It is good to be part of this.

In the present invention, the thermoplastic resin including the acrylic rubber is preferably composed of 30-80 wt% of graft acrylic rubber and 20-70 wt% of styrene-vinyl cyan-based copolymer resin. In a preferred embodiment of the present invention, the graft acrylic rubber is an acrylic rubber-vinyl cyan monomer-butadiene rubber-styrene monomer.

In the present invention, the thermoplastic resin includes an inorganic filler. The inorganic filler is not limited in theory. Inorganic fillers have the effect of increasing compatibility with the thermoplastic resin, and also has the advantage of high density and surface finish by dense structure. It also plays a role in improving long-term weather resistance. On the other hand, the fiber reinforcement is a needle-like short fiber uniformly distributed in the synthetic resin can structurally withstand a certain load.

In the present invention, as the inorganic filler used for the thermoplastic resin, it is more preferable to use an inorganic filler having a diameter of 2 to 15 µm and a lightweight material having a pH of 7 to 9.

 In a preferred embodiment of the present invention, the inorganic filler may be used alone or in combination of calcium carbonate (CaCO3), kaolin (Kaolin), clay (Clay), silica (Silica), Talc (Talc), etc., the inorganic The filler is preferably used in an amount of 1 to 10 parts by weight, preferably 3 to 8 parts by weight, based on 100 parts by weight of the resin composition.

If the content of the inorganic filler is high, there is a problem in securing the mechanical properties of the window and the dispersibility with the thermoplastic resin.

In the present invention, the fiber reinforcing agent is used to improve the tensile strength and flexural strength as a fine needle structure of the mechanical properties and to reduce the colorant due to the high adsorption performance and whiteness, the fiber reinforcing material is dispersible with thermoplastic resin In order to improve the compatibility and to secure mechanical strength and impact strength, it is preferable to use short fibers, and more preferably, use a product having a fiber diameter of 20 to 100 microns and an aspect ratio of 10: 1 to 20: 1. It is good to use neutral to alkaline fibers, preferably pH 7-9 for synergistic effect with inorganic fillers.

In the practice of the present invention, the fiber reinforcing agent may be used wollastonite, Sepiolite, Mica, etc., 1 to 10 parts by weight, preferably 100 parts by weight of the fiber reinforcement resin composition Preferably it is used in the range of 1-8 weight part.

In the present invention, the resin composition may contain 0.01 to 5 parts by weight, preferably 0.01 to 1.0 antioxidant, based on 100 parts by weight of the resin in order to prevent oxidation during extrusion. In the practice of the invention, the antioxidant is bis (2.4-di-tert-butylphenyl) pentaeratritol diphosphate, Songnox 6260 from Songwon Industries.

In the present invention, it is preferable to further use a ultraviolet absorber in the composition to prevent the window frame made of the extruded profile to be discolored by ultraviolet rays during use. Although not limited in theory, the ultraviolet absorbent may be used to prevent ultraviolet discoloration of butadiene mainly used in a quaternary copolymer, and may be 0.01 to 5.0 parts by weight, preferably 0.01 to 1.0 based on 100 parts by weight of the resin composition. It is preferable to use in the range by weight. The ultraviolet absorber may be used a conventional ultraviolet absorber used for preventing discoloration of plastics, preferably TibaUV-P is Shiva Special.

Styrene-based thermoplastic resin composition for a window frame according to the present invention may include a pigment for coloring, it is possible to color to suit the desired color.

Styrene-based thermoplastic resin composition for windows, window frames according to the present invention can be prepared using PVC extrusion conditions using the PVC extrusion equipment for windows. In the practice of the present invention, the styrenic thermoplastic resin for the window frame is typically extrudable in the extruder temperature range of 150 ~ 220 ℃ which is the extrusion condition of the PVC for the window frame, the raw material is a product mixed with less than 30% by weight of scrap Can be prepared.

In one aspect, the present invention provides a window material made of a thermoplastic resin including an inorganic filler having an average particle diameter of 2 to 15 μm and a short fiber reinforcement having a length of 500 microns or less. The thermoplastic resin has a specific gravity of 1.1 to 1.3, and if the specific gravity is too high, the structure of the window material becomes heavy, affecting the stability of the building. In addition, if the specific gravity is too low, there is a problem in the mechanical properties required by the window material.

According to the present invention, a new window composition comprising an inorganic filler and a fiber reinforcement is provided. The windows made of the composition for windows and doors according to the present invention are durable and inexpensive.

The present invention will be described in more detail with reference to the following comparative examples and examples.

Manufacture of rubber

Acrylic rubber, which is a rubbery polymer, is prepared by mixing a butyl acrylate monomer and a crosslinking agent using an emulsion polymerization method, first adding pure water as an initiator, an emulsifier and a dispersion medium to a polymerization tank, and then adding the monomer and the crosslinking agent continuously while raising the temperature to 70 ° C while stirring. . Graft acrylic rubber in which styrene-acrylonitrile is grafted to acrylic rubber by continuously adding 30 parts by weight of styrene and 10 parts by weight of acrylonitrile to 60 parts by weight of partially crosslinked solid-based acrylic rubber latex. ) Latex was prepared.

Separately, 60 parts by weight of polybutadiene latex (based on solid content) is first added to a polymerization tank and heated up to 70 ° C while stirring. When the polymerization was carried out by continuously adding an emulsifier, an initiator, and 30 parts by weight of styrene monomer and 10 parts by weight of acrylonitrile, styrene and acrylonitrile graft butadiene rubber (B) latex were prepared in the butadiene rubber.

SAN  Produce

By the bulk polymerization, a SAN copolymer having a weight average molecular weight of 250,000 and a weight average molecular weight / number average molecular weight distribution (Mw / Mn) of 5.2 was prepared.

Example 1

300 microns in length to 100 parts by weight of a thermoplastic resin composed of 40 parts by weight of dry powder salted with magnesium sulfate and 60 parts by weight of SAN, using a latex mixture of graft acrylic rubber and graft butadiene rubber in a weight ratio of 85:15. , 50 microns in fiber diameter, aspect ratio 10: 1, 10 parts by weight of sepiolide having a Ph of 8, 5 parts by weight of calcium carbonate, 2 parts by weight of benzotriazole, 2 parts by weight of white pigment, and 1 part by weight of external lubricant, 0.5 parts by weight of surface modifier was mixed with a mixer. The mixed product was extruded under the following extrusion conditions to measure the physical properties shown in Table 1.

Examples 2-4

Used in the same manner as in Example 1, was carried out by varying the content of the inorganic filler and the fiber reinforcing material.

Comparative Examples 1 to 4

Used in the same manner as in Example 1, was carried out by varying the content of the inorganic filler and fiber reinforcement

However, the examples are only for illustrating the present invention and do not limit the scope of the present invention.

[Examples 1-4 and Comparative Examples 1-4]

Next, environmentally friendly window profile compositions were prepared through the compositions shown in Table 1 (Examples 1 to 4 and Comparative Examples 1 to 4).

division practice
Example 1 practice
Example 2 practice
Example 3 practice
Example 4 compare
Example 1 compare
Example 2 compare
Example 3 compare
Example 4 SAN resin 60 60 60 60 60 60 60 60 AABS 40 40 40 40 40 40 40 40 Inorganic filler 3 10 10 10 10 - 10 10 Fiber reinforcement 5 3 5 10 - 15 15 15 Impact strength
(kgcm / cm) 3.2mm 12.6 14 16 10.2 7.3 10.1 6.7 7.0 6.4mm 17.9 17.1 18.1 13.7 6.8 13.7 8.4 7.1 Tensile Strength (kg? ㎠) 421 430 418 429 475 441 440.8 460.3 Elongation (%) 27.5 30.5 29.3 23.3 26.9 30.5 19.6 22.5 importance 1.1 1.1 1.1 1.2 1.1 1.1 1.2 1.16 MI (g / 10min) 5.6 5.7 6.1 5.8 6.2 5.1 5.5 4.7 HDT (℃) 90 89.5 88.7 88.1 84.7 88 89.5 89.9 Flexural Strength (kg? ㎠) 579 587 576 571 579 560.3 577.5 603 Flexural modulus (kg? ㎠) 22495 20920 20556 20670 19389 20413 27365 24830 Weatherability (1,000hr) 0.5 0.2 0.3 0.4 0.7 0.5 0.6 0.7

Extruded under the following extrusion conditions to measure the physical properties are shown in Table 1.

Each reaction condition and the results are shown in Table 1, and the physical property evaluation method is as follows.

Experimental Example

The physical properties of the powders prepared in Examples and Comparative Examples were expressed in the resin.

As a result of the Table 1 through the optimum mixing prescription of the inorganic filler and the fiber reinforcement of Examples 1 to 4 excellent mechanical properties and weather resistance is excellent, there is an effect that can work in the equivalent process of the existing PVC window extrusion extrusion process.

<Extrusion Condition>

The thermoplastic resins produced below were made into window frames through the extrusion machine for the manufacture of windows. Twin screw 95mm (manufactured by Sambu Machinery Co., Ltd.), a PVC extruder, was used as a window frame manufacturing machine and manufactured according to the following extrusion conditions. The model produced was the P chassis BF-115.

Die temperature Cylinder 3
Temperature Cylinder 2 temperature Cylinder 1 temperature Revolutions
(rpm) Take-off speed
(m / min) cooling water
Temperature Load 220 200 200 210 26 2.5 18-19 52

Extruder condition

Test Methods

(1) liquidity

According to ASTM D 1238 method, the load was measured by 10kg load, and the suitable fluidity range for extruding the window material should be 5 ~ 8g / 10min so that the window shape can be formed.

(2) Weathering test

In order to evaluate long-term weather resistance, 200 hours of UV (A type 310 nm) 0.74 W / m ² (light intensity) irradiation was performed for 200 hours using 8-hour Q-UV (manufacturer; US Q-PANEL). The color difference change after the test for + 3 minutes water spray + 45 ℃ condensation for 3 hours 57 minutes) was measured.

(3) HDT (heat deformation temperature)

Heat deflection temperature test shall be done in Method B as specified in KS M ISO75-2, but the specimens shall be tested in a flat direction. The number of specimens shall be two.

Claims (8)

The synthetic resin composition for eco-friendly windows and doors comprising 3-10 parts by weight of an inorganic filler and 1-10 parts by weight of a fiber reinforcing agent in 100 parts by weight of a thermoplastic resin containing an acrylic rubber. The synthetic resin composition of claim 1, wherein the fiber reinforcing material is at least one selected from glass fibers, wollastonite, sepiolite, and mica. . The method of claim 2, wherein the fiber reinforcing material has a needle-like structure, the fiber diameter is 20 ~ 100㎛, Aspect ratio 10 ~ 20: 1, pH 7 ~ 9 synthetic resin composition for an environmentally friendly window. The method of claim 1, wherein the inorganic filler is calcium carbonate (CaCO3), kaolin (Kaolin), clay (Clay), silica (Silica), talc (Talc) selected one or two or more selected for environmentally friendly windows. Synthetic resin composition. The synthetic resin composition of claim 4, wherein the inorganic filler has an average diameter of 2 to 15 µm and a pH of 7 to 9. The thermoplastic resin of claim 1, wherein the thermoplastic resin including the acrylic rubber includes 30-80 wt% of an acrylic rubber-vinyl cyan monomer-butadiene rubber-styrene monomer quaternary copolymer resin and a styrene-vinyl cyan copolymer resin. Eco-friendly synthetic resin composition for windows and doors, characterized in that consisting of 70% by weight. The thermoplastic resin composition of claim 6, wherein the thermoplastic resin composition including the acrylic rubber further comprises 1 to 8 wt% of a pigment, 0.1 to 2 wt% of a weather resistance improving agent, 0.1 to 0.5 wt% of an external lubricant, and 0.1 to 1 wt% of a surface modifier. Eco-friendly synthetic resin composition for windows and doors. 8. The synthetic resin composition for eco-friendly windows and doors according to claim 7, wherein the weather resistance improving agent is one or two or more selected from the group consisting of benzotriazole, HALS, and mixtures thereof.