Vinyl chloride-based polymer composition for extruded profile, method for producing same

Abstract

The present invention provides a vinyl chloride-based polymer composition for an extruded profile, a method for manufacturing the same, and an extruded profile. The vinyl chloride-based polymer composition for extruded profiles contains a vinyl chloride-based polymer (A), cellulose fibers (B), and a compatibilizer (C), and the main component raw material of the cellulose fibers (B) is low-basis-weight paper having a basis weight of 100 g / m2 or less. The purpose of the present invention is to provide: a vinyl chloride-based polymer composition for extruded profiles, which is obtained by heating and kneading a vinyl chloride-based polymer, cellulose fibers, and a compatibilizer; and a method for producing the vinyl chloride-based polymer composition for extruded profiles. The vinyl chloride-based resin composition maintains the specific flame retardancy and high heat insulation properties of vinyl chloride-based polymers, and also has excellent formability, rigidity and heat resistance.

Description

Technical Field

[0001] The present invention relates to a vinyl chloride polymer composition for an extruded profile having excellent moldability, rigidity and heat resistance, a method for producing the same, and an extruded profile. Background Art

[0002] In the past, extruded profiles made of vinyl chloride polymer compositions have been known as extruded profiles for window frames and the like. Vinyl chloride polymers are widely used as resin molding materials for residential building materials such as window frames as materials with excellent mechanical strength, weather resistance, and chemical resistance. Since the upper limit temperature of the heat resistance of vinyl chloride polymers is about 70 to 90°C, when they are used as exterior parts, they are sometimes deformed by the heat of the sun. In particular, the exterior parts of window frames are easily deformed because they are easily exposed to sunlight. Therefore, for parts that require heat resistance, chlorinated vinyl chloride polymers that are chlorinated to improve their heat resistance are used. However, compared with vinyl chloride polymers, chlorinated vinyl chloride polymers have a problem of low moldability due to poor fluidity.

[0003] Furthermore, the chlorination of vinyl chloride polymers is achieved by applying heat energy or light energy to the vinyl chloride polymers, which is costly and has a serious impact on the environment. Summary of the invention

[0004] Therefore, an object of the present invention is to provide a vinyl chloride polymer composition for extrusion profiles having excellent moldability, rigidity, heat resistance, and environmental performance, a method for producing the same, and an extrusion profile.

[0005] The inventors of the present invention have made intensive research and found that a vinyl chloride polymer composition for extrusion profiles obtained by heating and kneading a vinyl chloride polymer, cellulose fibers, and a compatibilizer maintains the flame retardancy and high thermal insulation properties unique to vinyl chloride polymers, and also has excellent formability, rigidity, and heat resistance.

[0006] The present invention relates to a vinyl chloride polymer composition for an extruded profile as described in the following items, a method for producing the same, and an extruded profile.

[0007] Item 1

[0008] A vinyl chloride polymer composition for extrusion profiles, comprising: a vinyl chloride polymer (A), cellulose fibers (B) and a compatibilizer (C), and

[0009] The main component raw material of the cellulose fiber (B) is 100 g / m 2 The following low-weight paper.

[0010] Item 2

[0011] The vinyl chloride polymer composition for extrusion profile according to item 1 further contains an ethylene-vinyl acetate copolymer (D), wherein the content of vinyl acetate constituting the ethylene-vinyl acetate copolymer (D) is greater than 3% by mass and less than 85% by mass, and the acetyl groups of the vinyl acetate constituting the ethylene-vinyl acetate copolymer (D) are substituted with hydrogen atoms through a saponification reaction, and the degree of saponification is greater than 0% and less than 95%.

[0012] Item 3

[0013] The vinyl chloride polymer composition for extrusion profile according to item 1 or 2, wherein all or part of the vinyl chloride polymer (A) is a vinyl chloride copolymer (E), the vinyl chloride copolymer (E) is obtained by graft polymerization of vinyl chloride and ethylene-vinyl acetate copolymer, and the ethylene-vinyl acetate copolymer constituting the vinyl chloride copolymer (E) is composed of the ethylene-vinyl acetate copolymer (D), and the content thereof is 0.3% by mass or more and 40% by mass or less.

[0014] Item 4

[0015] The vinyl chloride polymer composition for extrusion profiles according to items 1 to 3, wherein all or part of the vinyl chloride polymer (A) is a vinyl chloride copolymer (F), the vinyl chloride copolymer (F) is obtained by copolymerizing vinyl chloride and vinyl acetate, and the content of vinyl acetate constituting the vinyl chloride copolymer (F) is greater than 0.3% by mass and less than 30% by mass.

[0016] Item 5

[0017] The vinyl chloride polymer composition for extrusion profiles according to items 1 to 4, wherein the low-weight paper has a weight of 3 to 40 g / m 2 of tissue paper.

[0018] Item 6

[0019] According to the vinyl chloride polymer composition for extrusion profiles described in Items 1 to 5, the compatibilizer (C) is at least one selected from a polyol having a molecular weight of 130 to 400 and a plasticizer.

[0020] Item 7

[0021] The vinyl chloride polymer composition for extrusion profiles according to Items 1 to 6, wherein the compatibilizer (C) is tripropylene glycol or a plasticizer.

[0022] Item 8

[0023] The vinyl chloride polymer composition for extrusion profiles according to Items 1 to 7, wherein the compatibilizer (C) is tripropylene glycol, a trimellitic acid ester plasticizer, a phthalic acid plasticizer, or a polyester plasticizer.

[0024] Item 9

[0025] The vinyl chloride polymer composition for extrusion profiles according to items 1 to 8, wherein the cellulose fiber (B) is contained in an amount of 5.0 parts by mass or more and 40 parts by mass or less, and the compatibilizer (C) is contained in an amount of 0.02 parts by mass or more and 30 parts by mass or less, relative to 100 parts by mass of the vinyl chloride polymer (A).

[0026] Item 10

[0027] A method for producing a vinyl chloride polymer composition for extrusion profiles according to items 1 to 9, comprising the steps of mixing the vinyl chloride polymer (A), cellulose fiber (B), a compatibilizer (C), and, if necessary, an ethylene-vinyl acetate copolymer (D), and heating and kneading the mixture, wherein the main component raw material of the cellulose fiber (B) is 100 g / m 2 The following low-weight paper.

[0028] Item 11

[0029] An extruded profile is made from the vinyl chloride polymer composition for extruded profiles described in items 1 to 9.

[0030] According to the present invention, a vinyl chloride polymer composition for an extruded profile having excellent moldability, rigidity, and heat resistance, a method for producing the same, and an extruded profile can be provided. DETAILED DESCRIPTION

[0031] The following is a detailed description of the vinyl chloride polymer composition for extrusion profiles and the method for producing the same. The vinyl chloride polymer composition for extrusion profiles of the present invention comprises: a vinyl chloride polymer (A), cellulose fibers (B) and a compatibilizer (C), wherein the main component raw material of the cellulose fibers (B) is 100 g / m 2 The following low-weight paper.

[0032] In addition, the vinyl chloride polymer composition for extrusion profiles of the present invention is preferably produced by the following method, which comprises the steps of mixing a vinyl chloride polymer (A), cellulose fibers (B), a compatibilizer (C), and, if necessary, an ethylene-vinyl acetate copolymer (D), and heating and kneading the mixture, wherein the main component raw material of the cellulose fibers (B) is 100 g / m 2 The following low-weight paper.

[0033] In addition, the extruded profiles referred to in this specification refer to frame materials, frame materials, moldings, and decking materials used for openings such as windows and doors and building exterior products.

[0034] 1. Vinyl chloride polymer (A)

[0035] The vinyl chloride polymer (A) in the present invention includes vinyl chloride homopolymers; or copolymers of vinyl chloride and other vinyl monomers copolymerizable with vinyl chloride; and partially crosslinked vinyl chloride polymers obtained by copolymerizing vinyl chloride, other vinyl monomers copolymerizable with vinyl chloride as necessary, and polyfunctional monomers.

[0036] Examples of copolymers of vinyl chloride and other vinyl monomers copolymerizable with vinyl chloride include α-monoolefin monomers such as ethylene, propylene, and butene; vinyl esters such as vinyl acetate and vinyl propionate; alkyl vinyl ethers such as methyl vinyl ether and cetyl vinyl ether; styrene derivatives such as styrene and α-methylstyrene; (meth)acrylates such as n-butyl acrylate, 2-ethylhexyl acrylate, and methyl methacrylate; vinyl cyanides such as acrylonitrile and methacrylonitrile; N-substituted maleimides such as cyclohexylmaleimide and phenylmaleimide; and copolymers of vinyl chloride with at least one of other vinyl monomers copolymerizable with vinyl chloride.

[0037] In addition, as partially crosslinked vinyl chloride polymers obtained by copolymerization of vinyl chloride and multifunctional monomers, there can be listed multifunctional allyl compounds such as diallyl phthalate, diallyl isophthalate, diallyl terephthalate, diallyl fumarate, diallyl adipate, triallyl cyanurate; multifunctional vinyl ethers such as ethylene glycol divinyl ether and octadecyl divinyl ether; multifunctional (meth)acrylates such as 1,3-butanediol di(meth)acrylate, tripropylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, etc.; copolymers of vinyl chloride with at least one or more of the multifunctional monomers copolymerizable with vinyl chloride, and the copolymer is a vinyl chloride polymer having a partially crosslinked structure.

[0038] The average degree of polymerization of the vinyl chloride polymer (A) is preferably 600 to 3000. By setting it in this range, the formability of the mixture of the vinyl chloride polymer (A) and the cellulose fiber (B) etc. can be improved. Here, if the average degree of polymerization of the vinyl chloride polymer (A) is in the range of 700 to 2000, the formability of the mixture of the vinyl chloride polymer (A) and the cellulose fiber etc. is further improved.

[0039] The method for producing the vinyl chloride polymer (A) is not particularly limited and may be any method such as suspension polymerization, emulsion polymerization, solution polymerization, or bulk polymerization. However, suspension polymerization is preferred because the residual monomers are small.

[0040] The suspension polymerization method of the vinyl chloride polymer (A) is well known, and there is no particular limitation as long as a known method is used. In addition, when the vinyl chloride polymer is produced by a polymerization method such as emulsion polymerization, solution polymerization, or bulk polymerization, a known method can be used in the same manner.

[0041] 2. Cellulose fiber (B)

[0042] The cellulose fibers (B) used in the present invention are obtained from a raw material containing low-weight paper as a main component (preferably 80% by mass or more of the raw material).

[0043] In the present invention, low-weight paper can also be used after being pulverized with water.

[0044] In the present invention, low-weight paper is used, and the weight of the low-weight paper is 100g / m 2 Below, preferably 40g / m 2 The lower limit is not particularly limited, but is usually 3 g / m 2 Paper is generally manufactured through high-speed and efficient papermaking and coating processes, and through a strong multi-stage drying process. Paper that has undergone such processes often has rigid fibers with relatively more hydrogen bonding points between cellulose fibers. In contrast, low-weight paper is often manufactured at a relatively low speed to prevent paper damage, and it can have cellulose fibers that are easily dispersed due to fewer hydrogen bonding points.

[0045] The manufacturing method of these low-weight papers is not particularly limited, and they can be obtained in the following manner: a papermaking raw material mainly composed of plant fibers of a preset concentration is passed through a long net, a short net or a round net to make a wet paper (web), which is dehydrated by pressing, and further dried using various known drying devices to obtain low-weight paper. In addition, a process of winding the low-weight paper on a reel can be further provided after this. Examples of low-weight papers obtained by this method include: thin paper; newsprint; printing paper such as high-quality paper, medium-quality paper, and rough paper; processed paper such as packaging paper, moisture-proof paper, wallpaper base paper, paper container base paper, laminated board base paper, and molding base paper; lightweight coated paper such as inkjet recording paper, thermal recording paper, pressure-sensitive recording paper, and coated paper; form paper, corrugated cardboard base paper, etc.; in order to suppress the appearance of agglomerates in the vinyl chloride polymer composition used for extrusion profiles, it is preferred that the paper does not have a coating layer or a laminated structure. The use of these low-weight papers is not limited, as long as the gram weight is 100g / m 2 The following may be used, and for example, commercially available paper may be used.

[0046] In addition, among the above-mentioned low-weight papers, it is particularly desirable to use thin paper with low grammage. Specific thin paper can be used: household thin paper, glass paper, cigarette paper, dictionary paper, carbon paper base paper, office thin paper, capacitor paper, carbonless copy paper base paper, single-sided copy paper base paper, pressure-sensitive paper, foil paper, backing paper, insulating paper, release paper, cap body base paper, paper cloth base paper, paper yarn base paper, noodle bun paper, rayon refining paper, fruit wrapping paper, transfer paper, drawing paper base paper, airmail letter paper, artificial flower base paper, packaging rope base paper, hair bun rope base paper, mulberry paper, etc.

[0047] Among these, household tissue paper is more preferable because less chemicals, fillers, and foreign materials are mixed into the paper during the pulping or papermaking process.

[0048] Household tissues include: facial tissue, toilet paper, wiping paper, facial tissue, paper towel, napkin, tablecloth, tempura oil-proof paper, bed sheet, pillowcase, diaper, diaper paper, clothing paper, etc. In particular, toilet paper, facial tissue and wiping paper are more preferred because they use less chemical agents or fillers and strictly control the mixing of foreign matter or inclusions in terms of hygiene.

[0049] As the papermaking raw material for the low-weight paper of the present invention, for example, wood pulp such as conifer bleached kraft pulp (NBKP), broadleaf bleached kraft pulp (LBKP), or conifer unbleached kraft pulp (NUKP) can be used; or waste paper pulp regenerated from waste paper. In addition, as papermaking raw materials other than the above, wood pulp from conifers or broadleaf trees can be used, and as papermaking raw materials from non-wood plants, straw pulp, bagasse pulp, reed pulp, kenaf pulp, linen pulp, ramie pulp, hemp pulp, flax pulp, bamboo pulp, etc. can also be used. In addition, in the present invention, the papermaking raw material may contain lignin or may not contain lignin. In the case of containing lignin, the lignin can be removed during the manufacturing process, or the lignocellulose fiber can be treated to remove the lignin. In addition, fibers from plants that originally do not contain lignin can also be used. Furthermore, as the papermaking raw material, for example, dissolving pulp, sulfite pulp, kraft pulp, semi-chemical pulp, chemical ground pulp, ground pulp, thermomechanical pulp, woodchip pulp, and fiberboard pulp can be used.

[0050] Among these papermaking raw materials, preferred are wood pulps such as softwood bleached kraft pulp (NBKP), broadleaf bleached kraft pulp (LBKP), or softwood unbleached kraft pulp (NUKP); or waste paper pulp regenerated from waste paper.

[0051] By carrying out the papermaking step and the drying step using these papermaking raw materials, low-weight paper can be obtained. The above-mentioned papermaking raw materials may be used alone or in combination of two or more.

[0052] These papermaking raw materials can be adjusted, changed in type and proportion according to the quality required by various papers. In addition, various chemicals can be added (internal addition) to meet the requirements of quality and stable operation. As such chemicals, softeners, bulking agents, dyes, dispersants, wet paper strength enhancers, dry paper strength enhancers, water filtration enhancers, asphalt control agents, production increasers, etc. can be listed. In addition, these papermaking raw materials can be bleached, and intermediate products that have undergone a drying process in the manufacturing process can also be used. Specifically, waste paper or process recycled paper can be used.

[0053] In the present invention, the low-weight paper that has undergone a drying process is fed into a mixer as a cellulose raw material, and the pretreatment method of the low-weight paper before being fed into the mixer is not particularly limited. In addition, the pretreatment method may be dry pulverization or wet pulverization, preferably wet pulverization. By pulverizing the low-weight paper in a wet, i.e., water-containing sheet state, the low-weight paper can be pulverized into uniform sizes, which is convenient for mixing with vinyl chloride polymers (A) and the like in subsequent processes, or for feeding the low-weight paper into a mixer. Further, it is easy to evenly implement the dispersion in the vinyl chloride polymer (A) carried out in the mixer or to defibrate the cellulose fibers used into nanometer scale. This dispersion and defibration implemented at a uniform level will bring about a further improvement in mechanical strength or impact strength, and a decrease in the linear expansion coefficient. The pulverization method may be a known method, and a jet mill, roll mill, ball mill, cutter mill, stone mill, impact mill, DYNO-MILL, ultrasonic grinder, vibration mill, Loedige mixer, Henschel mixer, household juicer, mortar, etc. may be used.

[0054] In terms of formability, strength characteristics, and heat resistance, the content of the cellulose fiber (B) used in the present invention is 5.0 parts by mass or more and 40 parts by mass or less, more preferably 7.0 parts by mass or more and 35 parts by mass or less, and further preferably 9.0 parts by mass or more and 30 parts by mass or less, relative to 100 parts by mass of the vinyl chloride polymer (A).

[0055] 3. Compatibilizer (C)

[0056] The compatibilizer (C) used in the present invention is preferably at least one compound selected from a polyol having a molecular weight of 130 to 400 and a plasticizer.

[0057] The molecular weight of the polyol referred to in the present specification refers to the molecular weight of a single compound, and refers to the number average molecular weight of a mixture of polymers or oligomers.

[0058] As the polyol, polypropylene glycol-based diols (hereinafter also referred to as "PPG-based diols") are preferred. Examples of PPG-based diols include dipropylene glycol, tripropylene glycol, polyoxypropylene glycol having a number average molecular weight of 200, polyoxypropylene glycol having a number average molecular weight of 400, polyether polyols formed by addition polymerization of propylene oxide (hereinafter also referred to as "PO") and diols, and polyether polyols formed by addition polymerization of PO and alkylene oxides other than PO (ethylene oxide (hereinafter also referred to as "EO"), etc.). In addition, the addition polymerization of PO and other alkylene oxides may be random addition polymerization or block addition polymerization. The above-mentioned polyols may be used alone or in combination of two or more.

[0059] Examples of the diol include diols having 2 to 4 carbon atoms, such as ethylene glycol, propylene glycol, 1,3-butanediol, and 1,4-butanediol.

[0060] In PPG-based diols, structural isomers exist depending on the addition polymerization mode of PO, and the PPG-based diols referred to in this specification also include these various isomers and mixtures thereof. The molecular weight of the above-mentioned PPG-based diols is not particularly limited as long as it is in the range of 130 to 400, preferably in the range of 130 to 350, more preferably in the range of 130 to 300, and particularly preferably in the range of 150 to 250.

[0061] As the polyol of the compatibilizer (C), an addition polymer of ethylene oxide (EO) having a molecular weight of 130 to 400 (an addition polymer having 3 to 8 EOs) is also preferred. Examples of the addition polymer of EO include triethylene glycol, tetraethylene glycol, pentaethylene glycol, hexaethylene glycol, octaethylene glycol, and mixtures thereof. Regarding the mixture of the addition polymer of EO, a mixture having a number average molecular weight of 200 is referred to as PEG200, and a mixture having a number average molecular weight of 400 is referred to as PEG400.

[0062] In addition, the polyol may also use a glycerol derivative having a molecular weight of 130 to 400 and a mixture of glycerol derivatives. Specific examples of these glycerol derivatives include dimers of glycerol (diglycerol) and polymers obtained by addition polymerization of PO and glycerol (polyoxypropylene glyceryl ether). Polyoxypropylene glyceryl ether has structural isomers depending on the addition polymerization method of PO, and the polyoxypropylene glyceryl ether referred to in this specification also includes the structural isomers and mixtures thereof. Polyoxypropylene glyceryl ether is preferably polyoxypropylene glyceryl ether (number average molecular weight 250).

[0063] Among the polyols, from the viewpoint of compatibility between the cellulose fibers and the vinyl chloride polymer composition, at least one polyol selected from the group consisting of dipropylene glycol, triethylene glycol, diglycerol, tripropylene glycol, tetraethylene glycol, polyethylene glycol (number average molecular weight 200-400), polyoxypropylene glycol (number average molecular weight 200-400) and polyoxypropylene glyceryl ether (number average molecular weight 200-400) is preferred, and at least one polyol selected from the group consisting of dipropylene glycol, triethylene glycol, diglycerol, tripropylene glycol, tetraethylene glycol, polyoxypropylene glycol (number average molecular weight 200), polyoxypropylene glycol (number average molecular weight 400) and polyoxypropylene glyceryl ether (number average molecular weight 250) is more preferred.

[0064] Among these polyols, at least one polyol selected from the group consisting of dipropylene glycol, tripropylene glycol, polyoxypropylene glycol (number average molecular weight 200) and polyoxypropylene glycerol ether (number average molecular weight 250) is particularly preferred from the viewpoint of compatibility.

[0065] Since the flash point of the polyol used is 100° C. or higher, it is also preferable from the viewpoint of disaster prevention and safety when producing the composition of the present invention.

[0066] The above-mentioned dipropylene glycol, tripropylene glycol, polyoxypropylene glycol (average molecular weight 200), polyoxypropylene glycerol ether (average molecular weight 250) and polyoxypropylene glycol (average molecular weight 400) each have structural isomers, and these isomers or mixtures thereof are also included in the polyol of the present invention.

[0067] Examples of the plasticizer include phthalate plasticizers such as dimethyl phthalate, diethyl phthalate, di-n-butyl phthalate, diisobutyl phthalate, di-n-hexyl phthalate, di-n-heptyl phthalate, di(2-ethylhexyl)phthalate, di-n-octyl phthalate, diisononyl phthalate, dinonyl phthalate, diisodecyl phthalate, and butylbenzyl phthalate; adipate plasticizers such as dimethyl adipate, di-n-butyl adipate, diisobutyl adipate, di-n-hexyl adipate, di(2-ethylhexyl) adipate, diisononyl adipate, and diisodecyl adipate; and tri(2-ethylhexyl) trimellitate, tri-n-octyl trimellitate, and trimellitic acid. Trimellitic acid ester plasticizers such as tridecyl ester, triisodecyl trimellitate, and di-n-octyl-n-decyl trimellitate; polyester plasticizers such as phthalic acid polyester; phosphate ester plasticizers such as trimethyl phosphate, triethyl phosphate, tributyl phosphate, trihexyl phosphate, tri(butoxyethyl) phosphate, trioctyl phosphate, tri(2-ethylhexyl) phosphate, triphenyl phosphate, tricresyl phosphate, cresyl phenyl phosphate, tri(xylyl) phosphate, butyl di(xylyl) phosphate, octyl diphenyl phosphate, and trichloroethyl phosphate; citrate ester plasticizers such as acetyl tributyl citrate; epoxidized vegetable oil plasticizers such as epoxidized soybean oil and epoxidized linseed oil; sebacic acid ester plasticizers such as di(2-ethylhexyl) sebacate, etc.

[0068] Among these plasticizers, trimellitic acid ester plasticizers, phthalic acid plasticizers, and polyester plasticizers are particularly preferred from the viewpoint of compatibility between cellulose fibers and the vinyl chloride polymer composition.

[0069] From the aspects of moldability, strength characteristics, and heat resistance, the content of the compatibilizer (C) used in the present invention is 0.02 parts by mass or more and 30 parts by mass or less, more preferably 0.04 parts by mass or more and 27 parts by mass or less, and further preferably 0.06 parts by mass or more and 25 parts by mass or less, relative to 100 parts by mass of the vinyl chloride polymer (A).

[0070] 4. Ethylene-vinyl acetate copolymer (D)

[0071] From the aspects of the moldability, strength characteristics, and heat resistance of the vinyl chloride polymer composition for extrusion profiles of the present invention, the vinyl chloride polymer composition of the present invention preferably further contains an ethylene-vinyl acetate copolymer (D). The ethylene-vinyl acetate copolymer (D) is a copolymer of a vinyl ester monomer and an ethylene monomer.

[0072] The ethylene-vinyl acetate copolymer (D) is more preferably one in which the content of vinyl acetate constituting the ethylene-vinyl acetate copolymer (D) is 3% by mass or more and 85% by mass or less (hereinafter also referred to as condition (a)), and the acetyl groups of the vinyl acetate constituting the ethylene-vinyl acetate copolymer (D) are substituted with hydrogen atoms by a saponification reaction, and the saponification degree thereof is 0% or more and 95% or less (hereinafter also referred to as condition (b)).

[0073] Examples of the vinyl ester monomers include vinyl acetate, vinyl propionate, vinyl butyrate, vinyl caproate, vinyl octanoate, vinyl caprylate, vinyl laurate, vinyl myristate, vinyl palmitate, vinyl stearate, vinyl cyclohexanecarboxylate, vinyl pivalate, vinyl 2-ethylhexanoate, vinyl monochloroacetate, vinyl adipate, vinyl methacrylate, vinyl crotonate, vinyl sorbate, vinyl benzoate, vinyl cinnamate, and vinyl versatate.

[0074] Among these vinyl ester monomers, it is preferred to use vinyl acetate alone.

[0075] From the aspects of moldability, strength characteristics, and heat resistance of the vinyl chloride polymer composition for extrusion profiles of the present invention, the content of vinyl acetate constituting the ethylene-vinyl acetate copolymer (D) is preferably 3% by mass or more and 85% by mass or less, and more preferably 15% by mass or more and 50% by mass or less, as described in the condition (a). In addition, the ethylene-vinyl acetate copolymer (D) is preferably 0% by mass or more and 95% by mass or less, and more preferably 0% by mass or more and 90% by mass or less, as described in the condition (b).

[0076] From the viewpoint of strength characteristics, the content of the ethylene-vinyl acetate copolymer (D) used in the present invention is preferably 0.3 parts by mass or more and 40 parts by mass or less, and more preferably 0.5 parts by mass or more and 30 parts by mass or less, based on 100 parts by mass of the vinyl chloride polymer (A).

[0077] All or a part (preferably 10% by mass or more and 90% by mass or less) of the vinyl chloride polymer (A) in the present invention is a vinyl chloride copolymer (E) (hereinafter also referred to as vinyl chloride copolymer (E)) obtained by graft polymerization of vinyl chloride and ethylene-vinyl acetate copolymer, and the ethylene-vinyl acetate copolymer constituting the vinyl chloride copolymer (E) is composed of ethylene-vinyl acetate copolymer (D). When the content thereof is 0.3% by mass or more and 40% by mass or less, it is ideal from the aspects of moldability, strength characteristics, and heat resistance of the vinyl chloride polymer composition for extrusion profiles of the present invention.

[0078] In addition, all or a part (preferably 10% by mass or more and 90% by mass or less) of the vinyl chloride polymer (A) in the present invention is a vinyl chloride copolymer (F) (hereinafter also referred to as vinyl chloride copolymer (F)) obtained by copolymerizing vinyl chloride and vinyl acetate. When the content of vinyl acetate constituting the vinyl chloride copolymer (F) is 0.3% by mass or more and 30% by mass or less, it is ideal from the aspects of the moldability, strength characteristics, and heat resistance of the vinyl chloride polymer composition for extrusion profiles of the present invention.

[0079] 5. Vinyl chloride copolymer (E)

[0080] The vinyl chloride copolymer (E) in the present invention is a graft copolymer obtained by graft polymerization of vinyl chloride and ethylene-vinyl acetate copolymer (D). The vinyl chloride copolymer (E) is not particularly limited, and polymers having various properties can be obtained depending on the type of ethylene-vinyl acetate copolymer used and the content of vinyl acetate.

[0081] Regarding the vinyl chloride copolymer (E) used in the present invention, from the aspects of the moldability, strength characteristics, and heat resistance of the vinyl chloride polymer composition for extrusion profiles of the present invention, the ethylene-vinyl acetate copolymer constituting the vinyl chloride copolymer preferably satisfies the conditions (a) and (b), and from the aspects of the moldability, strength characteristics, and heat resistance of the vinyl chloride polymer composition for extrusion profiles of the present invention, the content of the ethylene-vinyl acetate copolymer is preferably from 0.3 mass % to 40 mass %, particularly preferably from 0.5 mass % to 30 mass %.

[0082] 6. Vinyl chloride copolymer (F)

[0083] The vinyl chloride copolymer (F) in the present invention can be obtained by copolymerizing a vinyl chloride monomer and a vinyl acetate monomer at an appropriate ratio.

[0084] In the vinyl chloride copolymer (F) used in the present invention, the content of vinyl acetate constituting the vinyl chloride copolymer (F) is preferably from 0.3 mass % to 30 mass %, particularly preferably from 0.5 mass % to 25 mass %, from the aspects of moldability, strength characteristics, and heat resistance of the vinyl chloride polymer composition for extrusion profiles of the present invention.

[0085] The vinyl chloride polymer composition for extrusion profiles of the present invention may further contain a lubricant. By containing a lubricant, the flowability of the vinyl chloride polymer composition can be improved, and excellent moldability can be exhibited.

[0086] Examples of the lubricant include aliphatic hydrocarbon-based lubricants, higher fatty acid-based lubricants, aliphatic alcohol-based lubricants, fatty acid ester-based lubricants, and metal soap-based lubricants.

[0087] As the above-mentioned aliphatic hydrocarbon lubricant, polyethylene wax, montanic acid wax, paraffin wax, etc. can be listed. As the above-mentioned higher fatty acid lubricant, stearic acid, hydroxystearic acid, palmitic acid, etc. can be listed. As the above-mentioned aliphatic alcohol lubricant, stearyl alcohol, cetyl alcohol, etc. can be listed. As the above-mentioned fatty acid ester lubricant, triglyceride, butyl stearate, etc. can be listed. As the above-mentioned metal soap lubricant, barium stearate, calcium stearate, zinc stearate, aluminum stearate, magnesium stearate, zinc stearate-barium stearate complex, zinc stearate-calcium stearate complex, etc. can be listed. These lubricants can be used alone or in combination of two or more.

[0088] The content of the lubricant is preferably 0.5 parts by mass and 15.0 parts by mass to 100 parts by mass of the chlorinated vinyl chloride resin. If the content of the lubricant is greater than the preferred lower limit and less than the preferred upper limit, a molded body having an excellent appearance can be obtained. The content of the lubricant is more preferably 0.7 parts by mass and 13.0 parts by mass to 100 parts by mass of the chlorinated vinyl chloride resin.

[0089] The vinyl chloride polymer composition for extrusion profiles of the present invention may also be mixed with the following additives as needed: heat stabilizer, stabilizing aid, processing aid, heat resistance modifier, ultraviolet absorber, light stabilizer, filler, thermoplastic elastomer, etc.

[0090] The heat stabilizer is not particularly limited, and examples thereof include organic tin stabilizers such as dimethyl tin mercapto, dibutyl tin mercapto, dioctyl tin mercapto, dibutyl tin maleate, dibutyl tin maleate polymer, dioctyl tin maleate, dioctyl tin maleate polymer, dibutyl tin laurate, and dibutyl tin laurate polymer; lead stabilizers such as lead stearate, dibasic lead phosphite, and tribasic lead sulfate; calcium-zinc stabilizers, barium-zinc stabilizers, and barium-cadmium stabilizers, etc. The heat stabilizers may be used alone or in combination of two or more.

[0091] The stabilizing agent is not particularly limited, and examples thereof include epoxidized soybean oil, epoxidized linseed oil, epoxidized tetrahydrophthalate, epoxidized polybutadiene, and phosphoric acid esters, etc. The stabilizing agent may be used alone or in combination of two or more.

[0092] The processing aid is preferably a processing aid containing an acrylic resin having a weight average molecular weight of 900,000 to 5,000,000. Examples of the acrylic resin include homopolymers of acrylic acid, methacrylic acid, or (meth)acrylic acid esters, or (meth)acrylic acid copolymers containing these. Examples of the (meth)acrylic acid esters include methyl (meth)acrylate, ethyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, and the like. In addition, examples of the (meth)acrylic acid esters include n-pentyl (meth)acrylate, isopentyl (meth)acrylate, n-hexyl (meth)acrylate, (2-ethylhexyl) (meth)acrylate, n-octyl (meth)acrylate, and the like. Among them, the (meth)acrylic acid represents acrylic acid or methacrylic acid. In the present invention, the acrylic processing aid preferably uses a polymer of methyl (meth)acrylate (MMA).

[0093] The heat resistance modifier is not particularly limited, and examples thereof include α-methylstyrene-based resins and N-phenylmaleimide-based resins. The light stabilizer is not particularly limited, and examples thereof include hindered amine-based light stabilizers.

[0094] The ultraviolet absorber is not particularly limited, and examples thereof include salicylate-based, benzophenone-based, benzotriazole-based, and cyanoacrylate-based ultraviolet absorbers.

[0095] Production of vinyl chloride polymer compositions for extrusion profiles

[0096] The vinyl chloride polymer composition for extrusion profiles of the present invention is obtained by heating and kneading the above-mentioned vinyl chloride polymer (A), cellulose fiber (B), compatibilizer (C), and, if necessary, ethylene-vinyl acetate copolymer (D) and / or any additives.

[0097] Regarding the heating and kneading time, the manufacturing volume should be taken into consideration and the mixing machine manufacturer should adjust the time within the range recommended by the mixing machine manufacturer for the device performance and the operating conditions such as the rotation speed. A short heating time is ideal because it can prevent the degradation caused by heat and oxidation during heating and kneading, but in the case of a short heating time, the dispersion in the resin may not be sufficient. Therefore, during the heating and kneading process, it is preferred that the screw element include a structure such as a rotor or a kneader to strengthen the kneading, and in particular, it is more preferred to use rotors at multiple locations so as to promote nanofiberization.

[0098] The kneading machine may be a single-screw or multi-screw kneading machine, and preferably a twin-screw kneading machine.

[0099] Furthermore, in the present invention, the total amount of the vinyl chloride polymer composition, cellulose fibers, compatibilizer, and ethylene-vinyl acetate copolymer and / or any additives used as required may be fed into the kneader at once or in multiple portions. Furthermore, in the case of multiple feeding, a side feeder or the like may be used.

[0100] In order to obtain a vinyl chloride polymer composition for extrusion profiles, there is no particular restriction on the number of times the treatment is performed using a kneading machine. When multiple treatments are performed, the same material can be kneaded multiple times. Furthermore, when multiple treatments are performed, the composition can be produced at a high concentration of cellulose fibers (B) accounting for 30 to 80% by mass of the total material in the initial treatment, and then the vinyl chloride polymer (A), cellulose fibers (B), compatibilizer (C), and ethylene-vinyl acetate copolymer (D) and / or any additives used as needed are added in each treatment in such a manner that the content of each component contained in the finally obtained vinyl chloride polymer composition is within the target range.

[0101] The cellulose fiber (B) used in the present invention can be cellulose fibers obtained by dry-crushing low-weight paper that has undergone a drying process before kneading, or can be cellulose fibers obtained by wet-crushing the low-weight paper in a hydrated state before crushing, or can be cellulose fibers made hydrated after dry-crushing.

[0102] In addition, the vinyl chloride polymer (A), cellulose fiber (B), compatibilizer (C), and ethylene-vinyl acetate copolymer (D) and / or any additives used as required may be mixed in advance before heating and kneading. In this case, the mixing method may include a method using a table roll mill, a Banbury mixer, a kneader, a planetary mixer, a Roediger mixer, a Henschel mixer, a stirrer with stirring blades, or a revolving or rotating stirrer.

[0103] The vinyl chloride polymer composition for extruded profiles of the present invention obtained in the above manner has excellent extrusion processability, preferably a Vicat softening temperature of 100° C. or higher, a linear expansion coefficient of 60×10 -6 / K or less, more preferably the Vicat softening temperature is 102°C or more, the linear expansion coefficient is 55×10 -6 / K or less, and more preferably, the Vicat softening temperature is 104°C or more, the linear expansion coefficient is 50×10 -6 / K or less.

[0104] The vinyl chloride polymer composition for an extrusion profile of the present invention can be molded by a conventionally known extrusion molding method to produce a molded product.

[0105] Example

[0106] Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples.

[0107] Example 1

[0108] Production of vinyl chloride polymer compositions for extrusion profiles

[0109] 100 parts by weight of a vinyl chloride polymer (average degree of polymerization: 1000) and 100 parts by weight of cellulose fibers (manufactured by DCM HOLDINGS, pure pulp, gram weight: 21 g / m 2 ) 105 parts by mass, compatibilizer (TOTM (tri(2-ethylhexyl) trimellitic acid)) 25.0 parts by mass, Ca-Zn stabilizer 5.0 parts by mass were fed into a twin-screw extruder (manufactured by Technovel, screw diameter The twin-screw extruder was heated and kneaded to obtain a high fiber concentration masterbatch of a vinyl chloride polymer composition for extrusion profiles. The barrel temperature of the twin-screw extruder was 130°C.

[0110] After further adding a vinyl chloride polymer, a Ca-Zn stabilizer, calcium carbonate, titanium oxide, a processing aid, a reinforcing agent, and a lubricant to the high fiber concentration masterbatch, the mixture was fed into an 8-inch twin-roll mill ("8-inch oil-heated roll" manufactured by KANSAI ROLL), kneaded at 165° C. for 10 minutes to form a sheet having a thickness of 0.7 mm, thereby obtaining a vinyl chloride polymer composition for extrusion profiles, the final composition of which was as follows: with respect to 100 parts by mass of vinyl chloride resin, 18.0 parts by mass of cellulose fibers, 4.0 parts by mass of TOTM, 4.0 parts by mass of a Ca-Zn stabilizer, 8.0 parts by mass of calcium carbonate, 3.0 parts by mass of titanium oxide, 3.0 parts by mass of an acrylic processing aid, 4.0 parts by mass of an acrylic reinforcing agent, 0.6 parts by mass of a dibasic acid diester, 0.3 parts by mass of a microcrystalline wax, and 0.2 parts by mass of a complex fatty acid ester.

[0111] Evaluation of vinyl chloride polymer compositions for extrusion profiles

[0112] Mechanical properties (flexural strength, flexural modulus, Vicat softening temperature, linear expansion coefficient)

[0113] The obtained vinyl chloride polymer composition sheet for extrusion profile was overlapped and inserted into a press ("50TON automatic compression molding machine" manufactured by Shinto Metal Industries). After preheating the press at 185°C for 10 minutes, it was pressed at 10MPa for 10 minutes to obtain a press plate with a thickness of 4mm. A test piece was cut from the obtained press plate by machining. Using the test piece, the bending strength and bending modulus were measured according to JIS K 7171, and the Vicat softening temperature was measured according to JIS K 7260A50 method. In addition, the linear expansion coefficient is a sample annealed at 105°C for 1 hour, using a thermomechanical measuring device (manufactured by TA Instruments, TMA Q400EM), in compression mode, initial load 0.005N, load 0.005N, nitrogen atmosphere, scanning range -20°C to 140°C, heating rate 5°C / min. The average linear expansion coefficient from 0°C to 60°C was used as the measured value. Table 1 shows the evaluation results.

[0114] Extrusion processability

[0115] Using the vinyl chloride polymer composition sheet for extrusion profile, according to ASTM D 2230, using Garvey die head to make extrusion sample, visually evaluate the appearance (edge ​​sharpness and surface smoothness) of each extrusion sample. When the appearance is normal, the evaluation result is expressed as "0", and when there are edge fractures or surface roughness, the evaluation result is expressed as "×". The evaluation results are shown in Table 1.

[0116] Comparative Example 1

[0117] A vinyl chloride polymer composition for extrusion profiles was prepared in the same manner as in Example 1 except that cellulose fibers were not added, and mechanical properties and extrusion processability were evaluated. The evaluation results are shown in Table 1.

[0118] Embodiments 2 to 4

[0119] Except that the compatibilizer was replaced by DOP (di(2-ethylhexyl)phthalate), adipic acid polyester (ADK CIZER PN-7550 manufactured by ADEKA Corporation), and TPG (tripropylene glycol), a vinyl chloride polymer composition for extrusion profile was prepared in the same manner as in Example 1, and the mechanical properties and extrusion processability were evaluated. The evaluation results are shown in Table 1.

[0120] Example 5

[0121] A vinyl chloride polymer composition for extrusion profiles was prepared in the same manner as in Example 1 except that EVA (ethylene vinyl acetate) was added when preparing the high fiber concentration masterbatch, and mechanical properties and extrusion processability were evaluated. The evaluation results are shown in Table 1.

[0122] Example 6

[0123] A vinyl chloride polymer composition for extrusion profiles was prepared in the same manner as in Example 1, except that the vinyl chloride polymer used in preparing the high fiber concentration masterbatch was replaced with EVA-G-PVC (a vinyl chloride graft copolymer obtained by grafting 87% by mass of vinyl chloride and 13% by mass of EVA), and the mechanical properties and extrusion processability were evaluated. The evaluation results are shown in Table 1.

[0124] Example 7

[0125] A vinyl chloride polymer composition for extrusion profiles was prepared in the same manner as in Example 6 except that the compatibilizer was changed from TOTM to a combination of TOTM and TPG, and the mechanical properties and extrusion processability were evaluated. The evaluation results are shown in Table 1.

[0126] Embodiments 8 to 9

[0127] A vinyl chloride polymer composition for extrusion profiles was prepared in the same manner as in Example 6 except that the compatibilizer was replaced with DOP and the addition amount was changed as shown in Table 1, and the mechanical properties and extrusion processability were evaluated. The evaluation results are shown in Table 1.

[0128] Comparative Example 2

[0129] A vinyl chloride polymer composition for extrusion profiles was prepared in the same manner as in Example 6 except that no compatibilizer was added, and the mechanical properties and extrusion processability were evaluated. The evaluation results are shown in Table 1.

[0130] Comparative Example 3

[0131] In addition to the cellulose fiber, high-weight paper (corrugated cardboard, weight 131g / m 2 ) were prepared in the same manner as in Example 6 for an extruded profile, and the mechanical properties and extrusion processability were evaluated. The evaluation results are shown in Table 1.

[0132] Table 1

[0133]

Claims

1. A vinyl chloride polymer composition for extrusion profiles, characterized in that Containing: vinyl chloride polymer (A), cellulose fiber (B) and compatibilizer (C), and The main component raw material of the cellulose fiber (B) is 100 g / m 2 The following low-weight paper.

2. The vinyl chloride polymer composition for extrusion profile according to claim 1, characterized in that: The invention also contains an ethylene-vinyl acetate copolymer (D), wherein the content of vinyl acetate constituting the ethylene-vinyl acetate copolymer (D) is 3% by mass or more and 85% by mass or less, and the acetyl groups of the vinyl acetate constituting the ethylene-vinyl acetate copolymer (D) are substituted with hydrogen atoms by a saponification reaction, and the saponification degree is 0% or more and 95% or less.

3. The vinyl chloride polymer composition for extrusion profile according to claim 2, characterized in that: All or part of the vinyl chloride polymer (A) is a vinyl chloride copolymer (E), and the vinyl chloride copolymer (E) is obtained by graft polymerization of vinyl chloride and an ethylene-vinyl acetate copolymer. The ethylene-vinyl acetate copolymer constituting the vinyl chloride copolymer (E) is composed of the ethylene-vinyl acetate copolymer (D), and the content thereof is 0.3% by mass or more and 40% by mass or less.

4. The vinyl chloride polymer composition for extrusion profile according to claim 1 or 2, characterized in that: All or part of the vinyl chloride polymer (A) is a vinyl chloride copolymer (F), wherein the vinyl chloride copolymer (F) is obtained by copolymerizing vinyl chloride and vinyl acetate, and the content of vinyl acetate constituting the vinyl chloride copolymer (F) is 0.3 mass % or more and 30 mass % or less.

5. The vinyl chloride polymer composition for extrusion profile according to claim 1 or 2, characterized in that: The low-weight paper has a weight of 3 to 40 g / m 2 of tissue paper.

6. The vinyl chloride polymer composition for extrusion profile according to claim 1 or 2, characterized in that: The compatibilizer (C) is at least one selected from polyols with a molecular weight of 130 to 400 and plasticizers.

7. The vinyl chloride polymer composition for extrusion profile according to claim 6, characterized in that: The compatibilizer (C) is tripropylene glycol or a plasticizer.

8. The vinyl chloride polymer composition for extrusion profile according to claim 7, characterized in that: The compatibilizer (C) is tripropylene glycol, trimellitic acid ester plasticizer, phthalic acid plasticizer or polyester plasticizer.

9. The vinyl chloride polymer composition for extrusion profile according to claim 1, characterized in that: The cellulose fibers (B) are contained in an amount of 5.0 parts by mass to 40 parts by mass, and the compatibilizer (C) is contained in an amount of 0.02 parts by mass to 30 parts by mass, based on 100 parts by mass of the vinyl chloride polymer (A).

10. A method for producing a vinyl chloride polymer composition for extrusion profiles according to claim 1 or 2, characterized in that: The method comprises the steps of mixing the vinyl chloride polymer (A), the cellulose fiber (B), the compatibilizer (C), and, if necessary, the ethylene-vinyl acetate copolymer (D), and heating and kneading the mixture, wherein the main component raw material of the cellulose fiber (B) is 100 g / m 2 The following low-weight paper.

11. An extruded profile, characterized in that: The polyvinyl chloride polymer composition for extrusion profiles is made from the polyvinyl chloride polymer composition for extrusion profiles according to claim 1 or 2.

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