JPH03182508A - Production of vinyl chloride polymer for powder slush molding - Google Patents
Production of vinyl chloride polymer for powder slush moldingInfo
- Publication number
- JPH03182508A JPH03182508A JP32309289A JP32309289A JPH03182508A JP H03182508 A JPH03182508 A JP H03182508A JP 32309289 A JP32309289 A JP 32309289A JP 32309289 A JP32309289 A JP 32309289A JP H03182508 A JPH03182508 A JP H03182508A
- Authority
- JP
- Japan
- Prior art keywords
- vinyl chloride
- polymerization
- chloride polymer
- slush molding
- suspension
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 229920000642 polymer Polymers 0.000 title claims abstract description 32
- 239000000843 powder Substances 0.000 title claims abstract description 28
- 238000000465 moulding Methods 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000000178 monomer Substances 0.000 claims abstract description 15
- 230000007062 hydrolysis Effects 0.000 claims abstract description 11
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 11
- 239000003505 polymerization initiator Substances 0.000 claims abstract description 10
- 239000000725 suspension Substances 0.000 claims abstract description 10
- 239000003381 stabilizer Substances 0.000 claims abstract description 9
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 14
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 14
- 150000001451 organic peroxides Chemical class 0.000 claims description 10
- 238000010557 suspension polymerization reaction Methods 0.000 claims description 4
- 238000006116 polymerization reaction Methods 0.000 abstract description 24
- OPQYOFWUFGEMRZ-UHFFFAOYSA-N tert-butyl 2,2-dimethylpropaneperoxoate Chemical compound CC(C)(C)OOC(=O)C(C)(C)C OPQYOFWUFGEMRZ-UHFFFAOYSA-N 0.000 abstract description 2
- -1 ester organic peroxide Chemical class 0.000 abstract 1
- 125000000864 peroxy group Chemical group O(O*)* 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 229920000578 graft copolymer Polymers 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000004014 plasticizer Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000010558 suspension polymerization method Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003999 initiator Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 210000004927 skin cell Anatomy 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ZIDNXYVJSYJXPE-UHFFFAOYSA-N 2-methylbutan-2-yl 7,7-dimethyloctaneperoxoate Chemical compound CCC(C)(C)OOC(=O)CCCCCC(C)(C)C ZIDNXYVJSYJXPE-UHFFFAOYSA-N 0.000 description 1
- 239000004803 Di-2ethylhexylphthalate Substances 0.000 description 1
- YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical compound CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 description 1
- 125000002777 acetyl group Chemical group [H]C([H])([H])C(*)=O 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- SHLNMHIRQGRGOL-UHFFFAOYSA-N barium zinc Chemical compound [Zn].[Ba] SHLNMHIRQGRGOL-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012933 diacyl peroxide Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- PRIFGVOVRHAALC-UHFFFAOYSA-N tert-butyl 3,3-dimethylbutaneperoxoate Chemical compound CC(C)(C)CC(=O)OOC(C)(C)C PRIFGVOVRHAALC-UHFFFAOYSA-N 0.000 description 1
- NMOALOSNPWTWRH-UHFFFAOYSA-N tert-butyl 7,7-dimethyloctaneperoxoate Chemical compound CC(C)(C)CCCCCC(=O)OOC(C)(C)C NMOALOSNPWTWRH-UHFFFAOYSA-N 0.000 description 1
- 239000012463 white pigment Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F14/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen
- C08F14/02—Monomers containing chlorine
- C08F14/04—Monomers containing two carbon atoms
- C08F14/06—Vinyl chloride
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polymerisation Methods In General (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は特定のポリビニルアルコールシよび有機過酸化
物を用いて塩化ビニル単量体の懸濁重合を行い、粉末ス
ラッシュ成形に適する塩化ビニル重合体を製造する方法
に関する。Detailed Description of the Invention (Industrial Application Field) The present invention involves suspension polymerization of vinyl chloride monomer using specific polyvinyl alcohol and organic peroxide to produce vinyl chloride polymer suitable for powder slush molding. The present invention relates to a method of manufacturing a composite.
（従来の技術）
粉末スラッシュ成形用塩化ビニル重合体は高度に多孔質
であること、良好な粉末流動性を有すること、および成
形工程で熱溶融に悪影響を与える皮層気泡膜を有さない
重合体であるとと〆要求される。(Prior Art) Vinyl chloride polymers for powder slush molding must be highly porous, have good powder flowability, and have no skin cell film that adversely affects thermal melting during the molding process. It is required that this is the case.
しかしながら、現状の塩化ビニル重合体の製造方法は、
その殆どが懸濁重合法で実施されている。However, the current manufacturing method of vinyl chloride polymer is
Most of them are carried out by suspension polymerization method.
懸濁重合法によシ得られる塩化ビニル重合体は、その粒
子表面に塩化ビニル単量体と懸濁安定剤とのグラフト重
合物が生成し、核グラフト重合物が塩化ビニル重合体の
熱溶融温度を高くせしめる皮層気泡膜となシ、その結果
混線及び混合工程を有さない粉末スラッシュ成形法の原
料に該グラフト重合物を 粒子表面に有する塩化ビニル
重合体を使用すると熱溶融しない部分が存在するために
得られた成形品表向に外観不良を起こすという欠点を有
している。In the vinyl chloride polymer obtained by the suspension polymerization method, a graft polymer of the vinyl chloride monomer and the suspension stabilizer is formed on the particle surface, and the core graft polymer is formed by thermal melting of the vinyl chloride polymer. If a vinyl chloride polymer having the graft polymer on the particle surface is used as a raw material for the powder slush molding method, which does not involve crosstalk or mixing processes, there will be parts that do not melt under heat. This method has the drawback of causing poor appearance on the surface of the molded product obtained.
（発明が解決しようとする課題）
本発明者らは塩化ビニル重合体そのものについて、皮膜
気泡膜に起因する成形品表面の外観不良を起こさず、高
度に多孔性であシ、粉末流動性に優れた、粉末スラッシ
ュ成形に適した塩化ビニル重合体を容易に製造できる方
法について鋭意研究した。その結果、特定の加水分解率
と粘度を有するポリビニルアルコールを懸濁安定剤とし
て用い、パーオキシエステル系有機過酸化物を重合開始
剤として用いて塩化ビニル単量体を水性懸濁重合させる
ことによう、得られた塩化ビニル重合体が上述の要求を
満足する粉末スラッシュ成形用塩化ビニル重合体になる
ことを見い出し、この知見に基づき本発明を完成した。(Problems to be Solved by the Invention) The present inventors have discovered that the vinyl chloride polymer itself does not cause poor appearance on the surface of molded products due to the bubble film, is highly porous, and has excellent powder fluidity. In addition, we conducted extensive research on a method to easily produce vinyl chloride polymers suitable for powder slush molding. As a result, it was decided to perform aqueous suspension polymerization of vinyl chloride monomer using polyvinyl alcohol with a specific hydrolysis rate and viscosity as a suspension stabilizer and a peroxyester-based organic peroxide as a polymerization initiator. It was discovered that the obtained vinyl chloride polymer can be used for powder slush molding and satisfies the above-mentioned requirements, and based on this knowledge, the present invention was completed.
以上の記述から明らかなように本発明の目的は皮層気泡
膜による成形品表面の外観不良を起こさず、高度に多孔
質で、粉末流動性に優れた、粉末スラッシュ成形に適し
た塩化ビニル重合体を容易にかつ安価に製造する方法を
提供することである。As is clear from the above description, the object of the present invention is to produce a vinyl chloride polymer suitable for powder slush molding, which is highly porous, has excellent powder fluidity, and does not cause defects in the appearance of the molded product surface due to the skin cell membrane. An object of the present invention is to provide a method for easily and inexpensively manufacturing.
（課題を解決するための手段） 本発明は下記の構成を有する。(Means for solving problems) The present invention has the following configuration.
懸濁安定剤として加水分解率７１〜７５モル％、粘度６
〜９ ｃｐｓのポリビニルアルコールかよヒ重合開始剤
としてパーオキシエステル系有機過酸化物を用いて塩化
ビニル単量体を懸濁重合するととを特徴とする粉末スラ
ッシュ成形用塩化ビニル重合体の製造方法。Hydrolysis rate 71-75 mol%, viscosity 6 as a suspension stabilizer
A method for producing a vinyl chloride polymer for powder slush molding, which comprises suspension polymerizing a vinyl chloride monomer using a peroxyester organic peroxide as a polyvinyl alcohol polymerization initiator of ~9 cps.
本発明で用いる懸濁安定剤は加水分解率が７１〜７５モ
ル係で粘度が６〜９ ｃｐｓのポリビニルアルコールで
ある。ここで加水分解率とはポリ酢酸ビニルのアセチル
基の何モルが加水分解されてヒドロキシル基に変化した
かの度合いを示す指標である。また粘度はポリビニルア
ルコール４１１を純水９６ｇに溶解させた水溶液を、ヘ
プラー粘度計を用いて、温度２０℃にて測定したときの
絶対粘度の値である。該ポリビニルアルコールの使用割
合は重合体の平均粒径を１１０〜１７０ミクロンに調整
し得る量とする。平均粒径がこれより小さいと粉末流動
性が悪くなシ、大きいと粉末スラッシュ成形による成形
物表面の平滑性が悪くなるという欠点を生じる。該ポリ
ビニルアルコールノ添加割合は用いる重合器や撹拌条件
によυ異なるが塩化ビニル単量体に対してほぼ４００〜
８００Ｐである。該ポリビニルアルコールは、前述の平
均粒径範囲に適するような使用割合の幅が広く、該ポリ
ビニルアルコールを用いることによシ、塊化、細粒化の
ない安定的な重合体の製造ができ、さらに可塑剤吸収性
を良くするような多孔性の重合体を製造しうる。The suspension stabilizer used in the present invention is polyvinyl alcohol with a hydrolysis rate of 71-75 molar and a viscosity of 6-9 cps. Here, the hydrolysis rate is an index indicating the degree to which moles of acetyl groups in polyvinyl acetate are hydrolyzed and converted into hydroxyl groups. Further, the viscosity is the absolute viscosity value when an aqueous solution prepared by dissolving polyvinyl alcohol 411 in 96 g of pure water is measured at a temperature of 20° C. using a Hepler viscometer. The proportion of polyvinyl alcohol used is such that the average particle size of the polymer can be adjusted to 110 to 170 microns. If the average particle size is smaller than this, the powder fluidity will be poor, and if it is larger than this, the smoothness of the surface of the molded product obtained by powder slush molding will be poor. The addition ratio of the polyvinyl alcohol varies depending on the polymerization vessel used and stirring conditions, but it is approximately 400 to 50% relative to vinyl chloride monomer.
It is 800P. The polyvinyl alcohol can be used in a wide range of proportions suitable for the above-mentioned average particle size range, and by using the polyvinyl alcohol, a stable polymer can be produced without agglomeration or fine particle formation. Additionally, porous polymers can be produced that improve plasticizer absorption.
本発明で用いる重合開始剤はパーオキシエステル系有機
過酸化物である。パーオキシエステル系有機過酸化物以
外の重合開始剤、例えばアゾ系開始剤、ジアシルパーオ
キサイド系開始剤などを用いると得られた塩化ビニル重
合体の熱安定性、特に初期着色性が悪化するため粉末ス
ラッシュ成形には適さなくなシ好ましくない。該パーオ
キシエステル系有機過酸化物は、好ましくは６０℃にか
ける半減期が３分〜１００時間であシ具体的にはｔ−ブ
チルパーオキシピバレート、ｔ−ブチルパーオキシネオ
デカノエート、ｔ−ブチルパーオキシネオヘキサノエー
ト、ｔ−アミルパーオキシネオデカノエート、クミルパ
ーオキシネオデカノエート等を例示することができる。The polymerization initiator used in the present invention is a peroxyester organic peroxide. If a polymerization initiator other than peroxyester-based organic peroxides, such as an azo-based initiator or a diacyl peroxide-based initiator, is used, the thermal stability, especially the initial colorability, of the resulting vinyl chloride polymer will deteriorate. It is not suitable for powder slush molding and is therefore undesirable. The peroxyester-based organic peroxide preferably has a half-life of 3 minutes to 100 hours at 60° C. Specifically, t-butylperoxypivalate, t-butylperoxyneodecanoate, Examples include t-butylperoxyneohexanoate, t-amylperoxyneodecanoate, and cumylperoxyneodecanoate.
該パーオキシエステル系有機過酸化物の使用割合は通常
塩化ビニル単量体の懸濁重合に使用される量と同程度で
よく、例えば用いる塩化ビニル単量体に対して０．０１
〜０．５重量％、好ましくは０．０３〜ｏ、ｉ重量％で
ある。また該パーオキシエステル系有機過酸化物はその
所定量を重合の初期の段階に全量重合器内に添加しても
よく、重合の経過につれて逐次的に重合器内に添加して
もか筐わない。The proportion of the peroxyester-based organic peroxide to be used may be approximately the same as the amount normally used in suspension polymerization of vinyl chloride monomer, for example, 0.01 to the vinyl chloride monomer used.
~0.5% by weight, preferably 0.03~0.i% by weight. Further, the peroxyester organic peroxide may be added in its entirety into the polymerization vessel at the initial stage of polymerization, or may be added to the polymerization vessel sequentially as the polymerization progresses. do not have.
塩化ビニル重合体の製造方法は懸濁安定剤として上述の
如く、特定の加水分解率と粘度を有するポリビニルアル
コールおよび重合開始剤としてパーオキシエステル系有
機過酸化物を用いる以外は通常の塩化ビニル単量体の懸
濁重合法と同様の方法で行われる。The method for producing a vinyl chloride polymer uses ordinary vinyl chloride monomers, except for using polyvinyl alcohol having a specific hydrolysis rate and viscosity as a suspension stabilizer and a peroxyester organic peroxide as a polymerization initiator. The method is similar to the suspension polymerization method for polymers.
得られた塩化ビニル重合体を粉末スラッシュ成形に用い
る場合には、該重合体の平均重合度が７００〜８５０程
度であることが望ましいので、重合温度を上述の平均重
合度になるように設定して重合させればよい。When the obtained vinyl chloride polymer is used for powder slush molding, it is desirable that the average degree of polymerization of the polymer is about 700 to 850, so the polymerization temperature should be set to the above average degree of polymerization. Polymerization can be carried out by
（実施例）
以下実施例、比較例を用いて本発明を具体的に説明する
が本発明はこれによって限定されるものではない。なお
、実施例、比較例で用いた評価方法は次の方法によった
。(Examples) The present invention will be specifically described below using Examples and Comparative Examples, but the present invention is not limited thereto. The evaluation method used in Examples and Comparative Examples was as follows.
（）多孔性
１０ｇの塩化ビニル重合体の粉末状試料にジ−２エチル
へキシルフタレート（ＤＯＰ）を充分量加えて室温で１
時間静置したのち遠心分離法によって過剰のＤＯＰを分
離し、試料の重量を測ｂ５試料１０ｇに吸収されたＤＯ
Ｐの重量を求め、試料１０ＯＮに吸収されたＤＯＰ量を
算出した（単位：ＰＨＲ）。この値の大小によシ粒子の
多孔性を評価した。この値が大きい程多孔性に富み、可
塑剤吸収性に優れていることを示す。() A sufficient amount of di-2-ethylhexyl phthalate (DOP) was added to a porous 10 g powder sample of vinyl chloride polymer, and
After allowing it to stand for a while, excess DOP was separated by centrifugation, and the weight of the sample was measured. b5 DO absorbed in 10 g of sample
The weight of P was determined, and the amount of DOP absorbed by sample 10ON was calculated (unit: PHR). The porosity of the particles was evaluated based on the size of this value. The larger this value is, the richer the porosity and the better the plasticizer absorbability.
（２）粉末流動性
かさ比重測定装置（ＪＩ８ Ｋ−６７２１）を用いて、
ホッパーに一定量の塩化ビニル重合体試料を充填し、試
料をホッパーの下部から落下させる。試料がホッパーの
下部から落下してしまうまでの時間を測定して粉末流動
性を評価した。この時間の短い程粉末流動性に優れてい
ることを示す。(2) Using a powder fluidity bulk specific gravity measuring device (JI8 K-6721),
A hopper is filled with a certain amount of vinyl chloride polymer sample, and the sample is dropped from the bottom of the hopper. Powder fluidity was evaluated by measuring the time it took for the sample to fall from the bottom of the hopper. The shorter the time, the better the powder fluidity.
実施例１、比較例１〜５
内容積２００１のジャケット付重合器にイオン交換水１
１２ｋｇを入れ、懸濁安定剤として加水分解率７３モル
％、粘度７．５ ｃｐｓのポリビニルアルコール４３Ｉ
ｌを重合器内に入れ、重合器を密閉後、撹拌しながら重
合器内の空気を真空ポンプで吸引し、ついで窒素ガスを
重合器内に導入して重合器内を窒素ガスで置換する操作
を３同経す返した。Example 1, Comparative Examples 1 to 5 One part of ion-exchanged water was placed in a jacketed polymerization vessel with an internal volume of 2001 cm.
12 kg of polyvinyl alcohol 43I with a hydrolysis rate of 73 mol% and a viscosity of 7.5 cps as a suspension stabilizer.
1 into the polymerization vessel, after sealing the polymerization vessel, suck the air inside the polymerization vessel with a vacuum pump while stirring, and then introduce nitrogen gas into the polymerization vessel to replace the inside of the polymerization vessel with nitrogen gas. I returned it after 3 times.
２０分間撹拌したのち、重合器内の窒素ガスを真空ポン
プで吸引して器内のガスを排出したのち６５．９ｋｇの
塩化ビニル単量体しよび重合開始剤のｔ−プチルパーオ
キシネオデカノエー）３０１１を重合器内に導入し昇温
しで器内温度を６５℃に制御しながら５時間重合反応を
行った。重合器内圧力が７ｋｇ／ｃｄＧになった時点で
未反応単量体を重合器外へ排出して重合反応を停止した
のち、重合器内のスラリーを抜き出し乾燥して粉末状の
塩化ビニル重合体を得た。After stirring for 20 minutes, the nitrogen gas inside the polymerization vessel was sucked in with a vacuum pump to exhaust the gas inside the vessel, and then 65.9 kg of vinyl chloride monomer and the polymerization initiator t-butylperoxyneodecano were added. A) 3011 was introduced into a polymerization vessel, the temperature was raised, and a polymerization reaction was carried out for 5 hours while controlling the temperature inside the vessel to 65°C. When the pressure inside the polymerization vessel reaches 7 kg/cdG, unreacted monomers are discharged to the outside of the polymerization vessel to stop the polymerization reaction, and then the slurry inside the polymerization vessel is extracted and dried to produce a powdered vinyl chloride polymer. I got it.
また比較例１〜５として比較例１は加水分解率７３モル
％、粘度７．５ｃｐｓのポリビニルアルコールを５６１
５比較例２はこれを２８．９用いる以外は実施例１に準
拠して、比較例３は加水分解率７０モル％、粘度５．Ｏ
ｃｐｓのポリビニルアルコールを４３ＩＩ、比較例４は
加水分解率８０モル％、粘度ｌ ３ ｃｐｓのポリビニ
ルアルコールｔ６５Ｊｉ’用いる以外は実施例１に準拠
して、比較例５は重合開始剤としてジラウロイルパーオ
キサイド５０＆を用いる以外は実施例１に準拠して重合
反応を行い、粉末状の塩化ビニル重合体を得た。実施例
１、比較例１〜５で得られた粉末状塩化ビニル重合体を
用いて多孔性および粉末流動性の評価を行った。In addition, as Comparative Examples 1 to 5, Comparative Example 1 uses 561% polyvinyl alcohol with a hydrolysis rate of 73 mol% and a viscosity of 7.5 cps.
5 Comparative Example 2 was based on Example 1 except that 28.9% of this was used, and Comparative Example 3 had a hydrolysis rate of 70 mol% and a viscosity of 5.9%. O
Example 1 was followed except that polyvinyl alcohol t65Ji' with a hydrolysis rate of 80 mol% and a viscosity of l 3 cps was used in Comparative Example 4, and dilauroyl peroxide was used as a polymerization initiator in Comparative Example 5. A polymerization reaction was carried out in accordance with Example 1 except that 50& was used to obtain a powdered vinyl chloride polymer. Porosity and powder fluidity were evaluated using the powdered vinyl chloride polymers obtained in Example 1 and Comparative Examples 1 to 5.
また実施例および比較各側で得られたそれぞれの塩化ビ
ニル重合体ｔｏｏｉ量部に、ＤＯＰ５０重量部、バリウ
ム−亜鉛系熱安定剤４重量部、塩化ビニルペーストレン
ジ１２重量部、白色顔料０．０２重量部をジャケット付
ヘンシェルミキサー（商品名）に入れ加温しながら５分
間撹拌混合して粉末スラッシュ成形用塩化ビニル重合体
組成物を調製した。該粉末スラッシュ成形用組成物を用
いて、次の要領で粉末スラッシュ成形性を評価した。Further, in addition to tooi parts of the vinyl chloride polymer obtained in each of the examples and comparisons, 50 parts by weight of DOP, 4 parts by weight of barium-zinc heat stabilizer, 12 parts by weight of vinyl chloride paste range, and 0.02 parts by weight of white pigment. Parts by weight were placed in a jacketed Henschel mixer (trade name) and stirred and mixed for 5 minutes while heating to prepare a vinyl chloride polymer composition for powder slush molding. Using the powder slush molding composition, powder slush moldability was evaluated in the following manner.
箱型形状をした成形用金型を温度２４０℃の加熱炉へ入
れ２０分間加熱したＩ）５、上述の組成物を金型上に散
布し、１５秒間静置して組成物を金型上に焼き付ける。A box-shaped molding mold was placed in a heating furnace at a temperature of 240°C and heated for 20 minutes.I) 5. Spread the above composition onto the mold and leave it to stand for 15 seconds to spread the composition onto the mold. burn it on.
その後、熱溶融していない余剰の組成物を金型表面から
取り除き、再び２分間加熱したのち金型を冷却して成形
品を取シ出した。得られた成形品の表面状態、着色度合
を目視観察した。Thereafter, the excess composition that had not been melted was removed from the surface of the mold, and after heating again for 2 minutes, the mold was cooled and the molded product was taken out. The surface condition and degree of coloring of the obtained molded product were visually observed.
以上の結果をまとめて第１表に示した。The above results are summarized in Table 1.
（発明の効果）
本発明の製造方法によシ得られる塩化ビニル重合体は、
多孔性に富み、可塑剤吸収性に優れ、粉末流動性が良好
で、かつ皮層気泡膜に起因する成形品表面の外観不良を
起こすことがないので、粉末スラッシュ成形に適した塩
化ビニル重合体である。(Effect of the invention) The vinyl chloride polymer obtained by the production method of the present invention is
It is a vinyl chloride polymer that is suitable for powder slush molding because it is highly porous, has excellent plasticizer absorption, has good powder flowability, and does not cause poor appearance on the surface of molded products due to skin layer film. be.
以上that's all
Claims (1)
度６〜９ｃｐｓのポリビニルアルコールおよび重合開始
剤としてパーオキシエステル系有機過酸化物を用いて塩
化ビニル単量体を懸濁重合することを特徴とする粉末ス
ラッシュ成形用塩化ビニル重合体の製造方法。() Suspension polymerization of vinyl chloride monomer using polyvinyl alcohol with a hydrolysis rate of 71 to 75 mol% and a viscosity of 6 to 9 cps as a suspension stabilizer and a peroxyester organic peroxide as a polymerization initiator. A method for producing a vinyl chloride polymer for powder slush molding, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32309289A JPH03182508A (en) | 1989-12-13 | 1989-12-13 | Production of vinyl chloride polymer for powder slush molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32309289A JPH03182508A (en) | 1989-12-13 | 1989-12-13 | Production of vinyl chloride polymer for powder slush molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03182508A true JPH03182508A (en) | 1991-08-08 |
Family
ID=18150987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32309289A Pending JPH03182508A (en) | 1989-12-13 | 1989-12-13 | Production of vinyl chloride polymer for powder slush molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03182508A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5849831A (en) * | 1996-04-19 | 1998-12-15 | Kuraray Co., Ltd. | Process for producing vinyl resin |
-
1989
- 1989-12-13 JP JP32309289A patent/JPH03182508A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5849831A (en) * | 1996-04-19 | 1998-12-15 | Kuraray Co., Ltd. | Process for producing vinyl resin |
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