JPH02138356A - Chlorinated vinyl chloride resin composition - Google Patents

Abstract

PURPOSE:To obtain the title composition having very excellent impact strength and moldability in addition to excellent heat resistance and chemical resistance by mixing a specified chlorinated vinyl chloride resin mixture with an impact resistance modifier. CONSTITUTION:100 pts.wt. chlorinated vinyl chloride resin mixture (A) comprising 50-100wt.% at least two chlorinated vinyl chloride resins (a) having different chlorine contents each of which is 60.5-68wt.%, 0-15wt.% chlorinated vinyl chloride resin (b) of a chlorine content >68wt.% and 0-50wt.% chlorinated vinyl chloride resin and/or vinyl chloride resin (c) of a chlorine content <60.5wt.% is mixed with 2-20 pts.wt. impact resistance modifier (B) (e.g., MBS resin or a multicomponent acrylic rubber resin). The title composition having very excellent impact resistance and moldability in addition to excellent heat resistance and chemical resistance can be obtained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a chlorinated vinyl chloride resin composition that has excellent heat resistance and chemical resistance, as well as particularly excellent impact strength and moldability. More specifically, a chlorinated vinyl chloride resin mixture containing two or more types of chlorinated vinyl chloride resins having a specific chlorine content and having different chlorine contents as main components, and a specific amount of an impact reinforcement agent. A chlorinated vinyl chloride resin composition comprising:

[Conventional technology and problems]

Chlorinated vinyl chloride resins are known to have excellent chemical resistance, weather resistance, and flame resistance, and to have much better heat resistance than ordinary vinyl chloride resins.

However, this chlorinated vinyl chloride resin (hereinafter referred to as C
- PVC), like vinyl chloride resin (hereinafter sometimes abbreviated as PVC), has the disadvantages of low impact resistance and high melt viscosity, making it difficult to mold. ing.

Therefore, when using C-PVC as a material for containers, tanks, piping for high-temperature chemical solutions, sewage piping for hot waste water, electrical cable protection pipes, etc., it cannot be used alone as is, and various modifications are required. There is a need to improve the above-mentioned drawbacks by adding a quality agent.

However, in the case of C-PVC, in general, increasing the amount of modifier blended to improve impact strength and moldability leads to a decrease in heat resistance and chemical resistance, and it is difficult to maintain heat resistance and chemical resistance. If this is the case, there is an extremely delicate and difficult problem between the amount of the modifier and the balance between these physical properties, such as insufficient impact strength and moldability.

Examples of those containing such a modifier include:
C-PVC mixed with a specific amount of chlorinated polyolefin (Japanese Patent Publication No. 38-12175), or multi-component resin obtained by copolymerizing acrylic acid alkyl ester, styrene, and methyl methacrylate. A blended version (Japanese Patent Publication No. 53-18230) has been proposed. However, products containing chlorinated polyolefin as a modifier often have lower moldability and heat resistance as impact strength improves, and products containing this multi-component resin as a modifier tend to have lower moldability and heat resistance. However, as impact strength is improved, moldability and chemical resistance tend to decrease, and it cannot be said that improvements in the balance between impact strength and other physical properties have been sufficiently achieved.

In addition, for the same purpose, several proposals are known in which various modifiers are further added to c-pvc mixed with PVC, and various composition ratios and modifications are made depending on the improvement purpose of each proposal. Combinations of different types of modifiers have been proposed.

However, each of these proposals has its advantages and disadvantages, and it is possible to obtain a resin composition that exhibits satisfactory impact strength, heat resistance, moldability, and other properties even under harsh usage conditions, and that has a good balance of these properties. The reality is that this is extremely difficult.

For example, a three-component chlorinated vinyl chloride resin composition ( Japanese Patent Publication No. 45-27905) is known, but this resin composition has problems such as poor chemical resistance and practical durability.

The present inventors have conducted research in order to develop a composition capable of overcoming the above-mentioned technical problems, which are desired to be improved, of conventionally proposed chlorinated vinyl chloride resin compositions.

As a result, two types of C-PVC having a specific chlorine content range and having different chlorine contents were found.
Compared to C-PVC alone or C-PVC/PVC blends, which have the same average chlorine content, blends of VC have the same amount of modifiers such as impact strengtheners. It has been found that it exhibits moldability equal to or better than that, outstandingly superior in terms of impact strength, excellent heat resistance, and equal or better in chemical resistance. In addition, if the amount of impact reinforcement is adjusted and blended so that the impact strength is the same, the blend of C-PVC requires the least amount of impact reinforcement, It has been found that this material exhibits superior heat resistance compared to other materials, as well as superior moldability and chemical resistance. Based on these discoveries, the present inventors conducted further research and completed the present invention.

[Means for solving problems]

The present invention provides the following (A) and (B), (A) The following (a), (a), (a) The chlorine content is 60.5 to 68% by weight, and the chlorine content is 50 to 100% by weight of two or more different types of chlorinated vinyl chloride resins, and chlorine content of 6
(c) Chlorinated vinyl chloride resin and/or vinyl chloride resin having a chlorine content of less than 60.5% by weight, 0 to 50% by weight, exceeding 8% by weight. %, 100 parts by weight of a chlorinated vinyl chloride resin mixture,
Another object of the present invention is to provide a chlorinated vinyl chloride resin composition, characterized in that it contains (B) 2 to 20 parts by weight of an impact reinforcement agent.

The present invention will be explained in detail below.

The chlorinated vinyl chloride resin composition of the present invention (hereinafter referred to as c-p
The chlorinated vinyl chloride resin mixture (hereinafter sometimes abbreviated as mixed resin) (A), which is contained in the main component amount in the VC composition (sometimes abbreviated as VC composition) It is what it is.

Component (a), which is the main component in the mixed resin (A), has a chlorine content of 60.5 to 68% by weight, and is composed of two or more types of C-PVC with different chlorine contents. requires something.

If the above component (a) is only one type and both Φ) and (c) components are O, this is the case where C-PvC is used alone in the prior art, and the modifier is used as described above. It is difficult to achieve a well-balanced combination of physical properties such as moldability, impact strength, heat resistance, and chemical resistance even by mixing the above. In addition, one component (a) and one component (b) [i.e., ultra-highly chlorinated vinyl chloride resin with a chlorine content exceeding 68% by weight (hereinafter sometimes abbreviated as 5C-PVC)] 1
Combinations with more than one species are not preferable because there are problems such as the resulting C-PVC composition does not have sufficient molding processability and the resulting molded product tends to lack impact strength. Furthermore, one type of component (a) and component (c) [i.e., a low chlorinated vinyl chloride resin with a chlorine content of less than 60.5% by weight (hereinafter sometimes abbreviated as LC-PVC) and/or PVC] ) In combination with one or more of the above c.
- Not much different from the case of using a mixed resin of pvc and PVC, the heat resistance is insufficient, the mechanical strength is insufficient compared to the excellent impact strength of the composition of the present invention, and the mechanical strength is insufficient. I don't like it because it's difficult. Furthermore, (a
Even when one component) is combined with one or more of each of components (b) and (c), the c-pvc composition of the present invention has excellent moldability, heat resistance, impact strength, and chemical resistance. It is difficult to combine these excellent properties in a well-balanced manner. In this way, the component (a) contains two or more types of c-pvc.
It is necessary to use them in combination.

In the above component (a), at least one type of C-PVC used is a highly chlorinated vinyl chloride resin (hereinafter sometimes abbreviated as HC-PVC) with a chlorine content of 64 to 68% by weight. ) is preferable. tic-P
The use of VC is preferable because a C-PVC&II composition can be obtained which has particularly excellent impact strength while maintaining excellent heat resistance and chemical resistance, and also has excellent moldability. Also, for the same reason, at least one of the 21 c-pvc is HC-PVC, and at least one of the other C-PVC has a chlorine content of 0.5% by weight compared to the chlorine content of the HC-PVC. % or more, more preferably 1.0% by weight or more, especially 2% by weight or more, and especially all types of c-pv constituting the component (a).
The chlorine content of c is 0.5% by weight or more, and even 1
．． Preferably, the difference is 0% by weight or more.

The types of C-PVC constituting the component (a) may be two or more, but even if three or more types are mixed, the improvement effect will not be much greater than when two types are mixed. Since this is difficult to improve, the component (a) may be a mixture of two types of c-pvc. In other words, the cough (a) component has a chlorine content of 64 to 6
C-PVC with a weight of 8 weight% and C-PVC with a chlorine content of 3160.5 to 66% by weight, particularly 60.5% to less than 64% by weight, which has a chlorine content of 2% or more less than this. Most preferably it is a mixture of seeds.

The HC-PV in 100% by weight of component (a)
The content of C is 5 to 95% by weight, preferably 20 to 80% by weight.
% by weight, particularly preferably from 35 to 65% by weight. By using HC-PVC at or above the lower limit, a molded article with excellent heat resistance can be obtained, and by using at or below the upper limit, excellent impact resistance strength can be maintained.

The proportion of the component (a) in 100% by weight of the mixed resin (A) is 50 to 100% by weight, preferably 60 to 100% by weight, particularly WJ to 100% by weight. Below the lower limit, it becomes difficult to maintain a good balance of properties such as heat resistance, impact strength, and chemical resistance of the resulting molded product, which is not preferable.

Mixed resin (A) in c-pvc#Ji composition of the present invention
In addition to the component (a), the component Φ), that is, C-PVC (SC-PV) with a chlorine content exceeding 68% by weight,
Although 5C-PVC has good heat resistance, it tends to reduce impact strength and moldability, and it is also difficult to chlorinate it for a particularly long time during its production. (1)).
Even if the component is used, it is mixed resin (A) 100! 1
%, at most 15% by weight, especially 1% by weight or less.

The mixed resin (A) also contains the component (c), that is, C-PVC (LC-PVC) with a chlorine content of less than 60.5% by weight.
PVC) and/or PVC can also be used in combination. However, if these (c) components are used in too large a quantity, the balance of heat resistance, impact resistance strength, mechanical strength, etc. may deteriorate, so the amount of LC-PVC and/or PvC used is at most 50% by weight. %, preferably 35% by weight.The average chlorine content of the mixed resin is preferably from 62 to 66% by weight. When the average chlorine content is 622 weight% or more, a molded product with excellent heat resistance is obtained, and when it is 66% by weight or less, the resulting c-pvc composition has excellent molding processability and the resulting molded product has good impact resistance. In good condition. Note that the average chlorine content (de) can be calculated using the following formula.

C-PVC that can be used in the present invention can be obtained by a known method, such as a method in which PvC powder is suspended in a gas phase or in water and then chlorinated.1, by appropriately adjusting the chlorination conditions. can be manufactured.

The viscosity of these C-PVCs measured by the nitrobenzene method according to JIS-6721 is not particularly limited, but in order to improve the moldability of the resulting composition and the impact strength of the molded product, 0.20-0.70
In particular, it is preferably in the range of 0.27 to 0.44.

PVC used in the production of c-pvc that can be used in the present invention may be a vinyl chloride homopolymer or a vinyl chloride copolymer of vinyl chloride and other copolymerizable monomers. However, when using a copolymer, the content of other copolymerizable monomers (hereinafter sometimes abbreviated as comonomers) is about 15 parts by weight based on 100 parts by weight of vinyl chloride. It should be no more than about 6 parts by weight, preferably about 6 parts by weight or less. Examples of such comonomers include, for example, vinyl esters such as vinyl acetate, vinyl propionate, vinyl laurate, vinyl versatate; acrylic esters such as methyl acrylate, ethyl acrylate, butyl acrylate; methyl methacrylate; Methacrylic acid esters such as ethyl methacrylate; maleic acid esters such as dibutyl maleate and diethyl maleate; fumaric acid esters such as diptyl fumarate and diethyl fumarate; vinyl methyl ether, vinyl butyl ether, vinyl octyl ether vinyl ethers such as acrylonitrile and methacrylonitrile; olefins such as ethylene, propylene, and n-butene; vinylidene halides other than vinyl chloride such as vinylidene chloride and vinyl bromide; vinyl halides, etc. can be given.

Furthermore, examples of PVCO that can be used together with C-PVC as needed in the present invention include vinyl copolymers.

The amount of these comonomers used is preferably about 15 parts by weight or less based on 100 parts by weight of vinyl chloride monomer.

The chlorinated vinyl chloride resin composition (c-PVC composition) of the present invention comprises the above-mentioned chlorinated vinyl chloride resin mixture (mixed resin) (A) and an impact strength enhancer (B).

As the above-mentioned impact strength enhancer (B), for example, methyl methacrylate-butadiene-styrene resin (hereinafter referred to as MB
(sometimes abbreviated as S-based resin), multi-component acrylic rubber-based resin, chlorinated polyethylene-based resin, and ethylene/vinyl acetate-based resin.

The above-mentioned MBS-based resin can be produced using a known method, for example, adding methyl methacrylate to a rubber containing butadiene as a main component.
A multicomponent resin obtained by graft polymerization of styrene or the like can be used. M like this
As a commercially available BS resin, for example, Metablen C-
product name] etc.

Examples of the multicomponent acrylic rubber resin include multicomponent resins obtained by graft polymerizing monomers such as methyl methacrylate, styrene, and acrylonitrile to a copolymer rubber mainly composed of acrylic acid ester.

This multicomponent resin is produced by a known method, for example, by reacting an acrylic acid alkyl ester with an alkyl group having 2 to 8 carbon atoms with a copolymerizable monovinylidene compound and a polyfunctional crosslinking agent. An aqueous dispersion of a rubber-like copolymer is prepared, and then, to 20 to 80 parts by weight of this rubber-like copolymer, a methacrylic acid alkyl ester whose alkyl group has 1 to 4 carbon atoms, a vinyl aromatic compound, and an unsaturated nitrile are added. and a monomer mixture 8 for grafting consisting of all or 2 to 3 types of monomers containing a monovinylidene group copolymerizable with these monomers.
It can be produced by a method such as graft polymerization of 0 to 20 parts by weight.

Commercially available multi-component acrylic rubber resin W-3
00, W-529 [manufactured by Eshishi Inden ■, trade name], etc.

In addition, as the post-chlorinated polyethylene, it is possible to appropriately select and use from known ones, but in particular, the chlorine content is 2.
It is suitably in the range of 0 to 45% by weight, preferably 30 to 40% by weight, and is non-crystalline. Commercial products of such post-chlorinated polyethylene include, for example, Elasuren 301A, 351A, 401A (manufactured by Showa Denko ■, trade name Tafun), Guisorafuku H-135CM#4I4-■, trade name), CPE-3614, 3615 [manufactured by Dow Chemical Company, trade name], etc.

Furthermore, ethylene/vinyl acetate resin (EVA resin)
As such, those containing 18.about.40 mol% of vinyl acetate units are suitable. Commercially available products of this kind include, for example, Evaflex 250, Evaflex IM
12, Elvaloy 837.838 [manufactured by Mitsui Polychemicals, trade name], etc.

These impact reinforcement agents (B) can be used alone or in combination of two or more. The blending amount is based on 100 parts by weight of the mixed resin (A),
It is selected in the range of 2 to 20 parts by weight, preferably 6 to 10 parts by weight. On the other hand, if the amount exceeds the upper limit, the heat resistance, chemical resistance, and mechanical strength of the molded article tend to decrease, which is not preferable.

The C-PVCII composition of the present invention may contain a molding processing aid in addition to the mixed resin (A) and the impact strength enhancer (B). Examples of such molding processing aids include high molecular weight copolymers of acrylic esters (2-ethylhexyl acrylate/butyl acrylate copolymers, etc.), copolymers of methyl methacrylate and acrylic esters, etc. Examples of commercially available molding aids include Metablane P-700 and P-501.
, P-551 (manufactured by Mitsubishi Rayon, trade name), etc.

The blending amount of the above molding processing aid is 1 of the above mixed resin (A).
00 parts by weight, the amount is generally 0.1 to 5 parts by weight, preferably 0.2 to 3 parts by weight. By setting the compounding amount above the lower limit value, molding processability is improved, and below the upper limit value, the heat resistance, mechanical strength, appearance etc. of the molded product are sufficiently maintained. It is preferable to appropriately select and mix within the range depending on the purpose of use of the c-pvc composition.

In addition to these, various additives such as stabilizers, lubricants, antioxidants, ultraviolet absorbers, colorants, fillers, etc. can be added to the C-PVC composition of the present invention, if necessary. . Examples of the above-mentioned stabilizers include lead-based stabilizers such as tribasic lead sulfate and dibasic lead phosphite; for example, butyl tin malate, butyl tin laurate, butyl tin mercaptide, octyl tin maleate, and octyl tin mercaptide. Examples include tin-based stabilizers such as Ptide and methyltin mercaptide.

In addition, examples of lubricants include metal soaps such as lead stearate, cadmium stearate, zinc stearate, and calcium stearate; waxes such as paraffin wax, microcrystal wax, and polyethylene wax; fatty acids; such as fatty acid amide, fatty acid Examples include fatty acid derivatives such as esters, aliphatic ketones, aliphatic alcohols, and partial fatty acid ester waxes. Examples of antioxidants include naphthylamine-based antioxidants such as phenyl-α-naphthylamine, phenyl-β-naphthylamine, and aldol-α-naphthylamine; for example, p-isopropoxy-diphenylamine, N.

Diphenylamine series such as N'-diphenyl-propylene diamine; for example, 2,2,4-trimethyl-1,
2-Polymer of dihydroquinone, 6-nitoxy2.2.
Quinolines such as 4-trimethyl-1,2-dihydroquinoline; monophenols such as 1-oxy-3-methyl-4-isopropylbenzene and 2,6-di-tert-butyl-4-methylphenol; 4. Polyphenols such as 4'-dihydroxydiphenyl, hindered bisphenol, tris-(2-methyl-4-hydroxy-5-tert-butylphenyl)butane; e.g. 4-
Examples include thiobisphenols such as 4'-thiobis-(6-tert-butyl-3-methylphenol).

Examples of ultraviolet absorbers include salicylic acid derivatives such as phenyl salicylate and p-octylphenyl salicylate; benzophenones such as 2,4-dihydroxybenzophenone and 2-hydroxy-4-methoxybenzophenone; for example, 2-(2'-Hydroxy-5'-methyl-phenyl)benzotriazole, 2-
(2'-hydroxy-3', 5'-di-tert-butyl-
benzotriazole series such as phenyl)benzotriazole; for example, resorcinol monobenzoate, 2
．． Examples include benzoic acid derivatives such as 4-di-tert-butylphenyl-3,5-tert-butyl-4-hydroxybenzoate and methyl O-benzoylbenzoate.

Coloring agents include, for example, inorganic pigments such as titanium oxide, lead white, SuL ←bon, pallite, carbon black, cadmium red, red iron, silver vermilion, and cadmium yellow; for example, azo pigments, nitroso pigments, and nitro pigments. , basic dye lakes, and organic pigments such as phthalocyanine pigments.

Examples of fillers include calcium carbonate, aluminum silicate, aluminum hydroxide, magnesium carbonate,
Examples include magnesium hydroxide, diatomaceous earth, wood flour, talc, silica, and mica.

The amount of these additives to be used can be arbitrarily selected as long as the above-mentioned properties of the composition of the present invention are not substantially deteriorated.
For example, based on the total weight of the mixed resin, from about 0 to about 5
parts by weight stabilizer, from about 0.5 to about 5 parts by weight lubricant, from about O to
Examples of amounts used include about 2 parts by weight of antioxidant, about 0 to about 2 parts by weight of ultraviolet absorber, about 0 to about 3 parts by weight of colorant, and about 0 to about 10 parts by weight of filler. Can be done.

As described above, the C-PVC II composition of the present invention comprises a mixed resin (A), an impact strength enhancer (B), and, if necessary, a molding aid, a stabilizer, a lubricant, an antioxidant, and an ultraviolet absorber. agent,
It is made by adding colorants, fillers, etc. Said c
-The proportion of the mixed resin in the PVC & 11 composition is not particularly limited and can be selected as appropriate depending on the application, but
For example, for use in durable structures such as chemical tanks and various piping, the content is generally 70 to 97% by weight, preferably 85 to 97% by weight.
It is 97% by weight. By using the mixed resin at or above the above lower limit, a molded product with excellent mechanical strength and heat resistance can be obtained, and by using the mixed resin at or below the above upper limit, the above C
- The proportion of the mixed resin in the c-pvc composition is preferably within the above range, since the molding processability of the PVC composition is good and a molded article having excellent impact strength can be obtained.

The C-PVC composition of the present invention can be prepared by mixing the above-mentioned mixed resin (A) and impact-resistant reinforcing agent (B), and optionally a molding processing aid and the above-mentioned various additives at the same time or in any order. It can be manufactured by The mixing means can be selected and used as appropriate, and it is preferable to select a mixing means that can mix the above-mentioned components as uniformly as possible.

Mixing can be carried out using, for example, a high-speed mixer such as a Henshi J4 Lumixer or a Supermixer, a rephone blender, a Banbury Mixer 1 continuous kneader, a mixing roll, or a Laikaiki mixer.

The mixing method is to put each component into the mixer, for example, 2
At a temperature below 10℃, the time appropriate for each mixer,
Preferably, it is blended uniformly.

〔Example〕

EXAMPLES Next, the present invention will be explained in more detail with reference to examples, but the present invention is not limited to these examples in any way.

In addition, each physical property of the composition was evaluated according to the following method.

Creation of the folded cliff ■ The powdered resin composition was kneaded at 180°C for 7 minutes using an 8-inch roll mixer to obtain a sheet of approximately 0.55 mm, and then this sheet was divided into 2 or 6 sheets in length and width. They were stacked so that the directions were alternate, and press-molded at 190°C to obtain a plate-like body with a thickness of IM or 31u111, and then
Test pieces were cut out from each plate.

(1) Impact resistance strength A Charpy impact test was conducted in accordance with JIS K-7111 to determine impact resistance. The test piece was cut out from a plate with a thickness of 3 mm.

(2) Heat resistance A flexibility temperature test was conducted in accordance with JIS K-6745 to determine heat resistance. The test piece was cut out from a plate with a thickness of Im.

(3) Melt viscosity and sustained thermal stability 57 g of the powdered resin composition is filled into the rotor tank of a Brabender Plastograph machine whose temperature has been adjusted to 200'C in advance, and the kneader is rotated at 5° rpm. By melt-kneading the composition, the melt resistance value (torque, m) in a stable state is taken as the melt viscosity value, and the time (minutes) from the start of gelation of the composition to the start of thermal decomposition is taken as the melt viscosity value. The value was taken as the value of sustained thermal stability.

In addition, from the viewpoint of moldability, the melt viscosity is preferably 3 kg-m or less, and the sustained thermal stability is preferably 15 minutes or more.

(4) Roll sheet gelation properties 8 inch φ, 20 inch long mixing rolls (2 rolls) preset at 180°C were rotated at 15 rpm and 18 rpm.
150 g of the powdered resin composition was filled and kneaded to form a sheet, and the roll processability at that time was observed, and the roll sheet gelability was evaluated according to the following criteria.

(a) Time from powder to rolled into sheet.

Within 1 minute: 0 Less than 1 to 2 minutes: 0 Less than 2 to 3 minutes: Δ 3 minutes or more: × (b) After being rolled into a sheet and kneaded for 30 minutes, the state of peeling of the sheet was observed.

Good peelability 2 〃 Slightly poor: I Poor: Δ Adhesive to roll: × (5) Chemical resistance A 30% by weight chromic acid aqueous solution and an 80% by weight sulfuric acid aqueous solution were prepared, and the solution temperature was adjusted to 60% by weight. After immersing a test piece (25 x 80 x 3 mm) in each solution for 2 weeks at °C, washing it with running water for 2 hours and keeping it in a desiccator for 48 hours, its flexural modulus was determined according to JIS K-7203. The chemical resistance was evaluated according to the following criteria.

Change in elastic modulus is less than 5%: O β Less than 5-10%: Δ #10% or more: × Example 1 C-PVC with chlorine content of 61.2% by weight (intrinsic viscosity 0
．． 263) 45 parts by weight and 164.4% by weight of chlorine
The following formulation using 100 parts by weight of a mixed resin (average chlorine content 63.0% by weight) consisting of 55 parts by weight of C-PVC (intrinsic viscosity 0.246) was processed using a sieve machine.
After mixing at 20°C for 15 minutes, the mixture was taken out and cooled to prepare a powdery c-pvc composition, and each physical property was determined for this composition. The results are shown in Table 1.

Compound mixed resin: 100 parts by weight MS: Fat impact reinforcement: 3 parts by weight [Krem BT
A I [[NX, manufactured by Kureha Chemical Industry ■] Acrylic resin processing aid 2 parts by weight [Metablen P-501, manufactured by Mitsubishi Rayon ■] Malate stabilizer 3 parts by weight (TVS''NK-2208, manufactured by Nitto Kasei ■) ) Fatty acid ester lubricant 2 parts by weight (T V S'
BK-11, manufactured by Nitto Kasei ■ Examples 2 and 3 A powdered c-pvc composition was prepared in the same manner as in Example 1 except that the amount of the MBS-based resin impact strength enhancer was changed. Each physical property was determined for. The formulation composition and physical property test results are shown in Table 1.

Comparative Examples 1 to 3 In Examples 1 to 3, the chlorine content was 6 instead of the mixed resin.
A powdered resin composition was prepared in the same manner except that 3.0% by weight of c-pvc (intrinsic viscosity: 0.256) was used, and each physical property was determined for this composition. The formulation composition and physical property test results are shown in Table 1.

Comparative Examples 4 to 6 In Examples 1 to 3, 35 parts by weight of PVC (chlorine content 56.8% by weight; intrinsic viscosity 0.280) and C-PVC with chlorine content 66.2% by weight were used instead of the mixed resin. (Intrinsic viscosity: 0.233) A powdered resin composition was prepared in the same manner except that a resin mixture consisting of 65 parts by weight was used, and each physical property was determined for this composition. The formulation composition and physical property test results are shown in Table 1.

Example 4 In Example 1, the mixed resin had a chlorine content of 60°2.
30 parts by weight of C-PVC (intrinsic viscosity 0.267), 40 parts by weight of C-PVC with a chlorine content of 63.0% by weight, and 30 parts by weight of C-PVC with a chlorine content of 166.2% by weight (average A powdered C-PVC composition was prepared in the same manner except that 100 parts by weight (chlorine content: 63.J% by weight) was used, and each physical property was determined for this composition. The formulation composition and physical property test results are shown in Table 1.

Example 5 In Example 1, the mixed resin had a chlorine content of 61.2
Weight% (7) C-PVC 35 parts by weight, chlorine content 66.
Consisting of 50 parts by weight of 2% C-PVC and 15 parts by weight of PVC (average chlorine content 63.0% by weight) 100
A powdered c-pvc composition was prepared in the same manner except that parts by weight were used, and each physical property was determined for this composition. The formulation composition and physical property test results are shown in Table 1.

Example 6 In Example 1, the mixed resin had a chlorine content of 63.0
31% by weight C-PVC 55 parts by weight and chlorine content 66.
Powdered r-hτu# was prepared in the same manner except that 100 parts by weight of 45 parts by weight of 2% by weight C-PVC (average chlorine content 64.4% by weight) was used, and each physical property was determined for this product. I asked for it. The formulation composition and physical property test results are the first
Shown in the table.

Example 7 In Example 1, the mixed resin had a chlorine content of 61.2
Weight% (DC-PVC 40 parts by weight, chlorine content 66.2
C-PVC 50 parts by weight and chlorine content 68.2% by weight
A powdered C-PVC composition was prepared in the same manner except that 100 parts by weight of C-PVCIO (average chlorine content 64.4% by weight) was used. I asked for it. The formulation composition and physical property test results are shown in Table 1.

Comparative Example 7 In Example 1, chlorine was added instead of the mixed resin! 64.
A powdered resin composition was prepared in the same manner except that 4% by weight of C-PVC was used, and each physical property was determined for this composition. The results are shown in Table 1.

Comparative Example 8 In Example 1, the chlorine content was 60% instead of the mixed resin.
．． 2% by weight c-pvcao parts and chlorine content 66
．． A powdered resin composition was prepared in the same manner except that a resin mixture consisting of 70 parts by weight of 2% by weight C-PVC was used,
Each physical property was determined for this material. The results are shown in Table 1.

Examples 11 to 17 and Comparative Examples 11 to 18 In Examples 1 to 7 and Comparative Examples 1 to 8, MBS was used as an impact reinforcement agent.
Powdered resin compositions were prepared in the same manner except that a multi-component acrylic rubber-based resin [manufactured by H. Each physical property was determined for the product.The blend composition and the physical property test results are shown in Table 2.

Examples 21 to 27 and Comparative Examples 21 to 28 In Examples 1 to 7 and Comparative Examples 1 to 8, MBS was used as an impact reinforcement.
Post-chlorinated polyethylene [15? Powdered resin compositions were prepared in the same manner except that Noah/Δ: manufactured by Ihψ"l v4 was used, and the physical properties of these were determined. The blended composition and physical property test results are shown in Table 3. show.

(Effect of the invention) In Table 1, in which MBS resin was used as an impact reinforcement agent, Examples 1 and 4.5 and Comparative Examples 1°4; Example 2 and Comparative Examples 2 and 5; and Example 3 and Comparison. Example 3.6: Comparing Examples 6 and 7 with Comparative Examples 7 and 8, the composition of the invention (Example 1
-7) all have excellent impact strength by blending the same level of impact reinforcement, and also have excellent heat resistance, sustained heat stability, melt viscosity, roll sheet gelling property,
It is clear that they have the same or better physical properties in terms of chemical resistance as well. In other words, when trying to obtain a composition with the same level of impact strength, in the case of c-pvc alone, or in the case of c-PVC and PVC or chlorine content → less than wt% C-
Example 2 and Comparative Example 3) when using a resin mixture with PVC.

The same holds true for Tables 2 and 3 in which the type of impact reinforcement agent was changed.

As described above, the chlorinated vinyl chloride resin composition of the present invention maintains the excellent heat resistance, chemical resistance, weather resistance, and flame resistance that chlorinated vinyl chloride resin inherently has, and also has high impact resistance and strength. It has excellent moldability and is particularly suitable as a material for containers, tanks, and piping for high-temperature chemical solutions, sewage piping for hot waste water, and electrical cable protection pipes, as well as for plating tanks and chlorine gas piping. It is also useful for applications such as window panels for reaction tanks, and components for buildings and structures such as window frames, wall panels, and vibrators.

Claims (1)

[Claims] (1) The following (A) and (B), (A) The following (a) to (c), (a) The chlorine content is 60.5 to 68% by weight, and the chlorine content is compatible with each other. 50 to 100% by weight of two or more different types of chlorinated vinyl chloride resins, (b) 0 to 15% by weight of chlorinated vinyl chloride resins with a chlorine content of more than 68% by weight, and (c) a chlorinated vinyl chloride resin with a chlorine content of more than 68% by weight. 100 parts by weight of a chlorinated vinyl chloride resin mixture consisting of less than 60.5% by weight of a chlorinated vinyl chloride resin and/or 0 to 50% by weight of a vinyl chloride resin; 20 parts by weight of a chlorinated vinyl chloride resin composition.