JPH0368643A - Styrenic resin composition for molded item having excellent delustered appearance, molding therefrom, and preparation thereof - Google Patents
Styrenic resin composition for molded item having excellent delustered appearance, molding therefrom, and preparation thereofInfo
- Publication number
- JPH0368643A JPH0368643A JP20634989A JP20634989A JPH0368643A JP H0368643 A JPH0368643 A JP H0368643A JP 20634989 A JP20634989 A JP 20634989A JP 20634989 A JP20634989 A JP 20634989A JP H0368643 A JPH0368643 A JP H0368643A
- Authority
- JP
- Japan
- Prior art keywords
- fine particles
- styrenic resin
- resin composition
- matte
- parts
- 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
- 229920001890 Novodur Polymers 0.000 title claims abstract description 36
- 239000011342 resin composition Substances 0.000 title claims description 17
- 238000000465 moulding Methods 0.000 title description 12
- 238000002360 preparation method Methods 0.000 title 1
- 239000002245 particle Substances 0.000 claims abstract description 49
- 239000010419 fine particle Substances 0.000 claims abstract description 43
- 229920000642 polymer Polymers 0.000 claims abstract description 33
- 238000001746 injection moulding Methods 0.000 claims abstract description 23
- 239000004793 Polystyrene Substances 0.000 claims abstract description 21
- 229920002223 polystyrene Polymers 0.000 claims abstract description 21
- 229920005989 resin Polymers 0.000 claims abstract description 21
- 239000011347 resin Substances 0.000 claims abstract description 21
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 38
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 11
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229920006037 cross link polymer Polymers 0.000 claims description 2
- JHPBZFOKBAGZBL-UHFFFAOYSA-N (3-hydroxy-2,2,4-trimethylpentyl) 2-methylprop-2-enoate Chemical compound CC(C)C(O)C(C)(C)COC(=O)C(C)=C JHPBZFOKBAGZBL-UHFFFAOYSA-N 0.000 claims 2
- -1 methacrylate ester Chemical class 0.000 abstract description 5
- 230000004313 glare Effects 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract 1
- 150000002148 esters Chemical class 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000006116 polymerization reaction Methods 0.000 description 12
- 238000009826 distribution Methods 0.000 description 11
- 239000000203 mixture Substances 0.000 description 11
- 238000001125 extrusion Methods 0.000 description 8
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 7
- 239000000178 monomer Substances 0.000 description 7
- 239000008188 pellet Substances 0.000 description 7
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 238000002156 mixing Methods 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 5
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 4
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 4
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000003431 cross linking reagent Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000005498 polishing Methods 0.000 description 4
- 238000010557 suspension polymerization reaction Methods 0.000 description 4
- 229920001893 acrylonitrile styrene Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Substances CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 description 3
- HMZGPNHSPWNGEP-UHFFFAOYSA-N octadecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C(C)=C HMZGPNHSPWNGEP-UHFFFAOYSA-N 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- SCUZVMOVTVSBLE-UHFFFAOYSA-N prop-2-enenitrile;styrene Chemical compound C=CC#N.C=CC1=CC=CC=C1 SCUZVMOVTVSBLE-UHFFFAOYSA-N 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 2
- DBCAQXHNJOFNGC-UHFFFAOYSA-N 4-bromo-1,1,1-trifluorobutane Chemical compound FC(F)(F)CCCBr DBCAQXHNJOFNGC-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000012798 spherical particle Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- WDQMWEYDKDCEHT-UHFFFAOYSA-N 2-ethylhexyl 2-methylprop-2-enoate Chemical compound CCCCC(CC)COC(=O)C(C)=C WDQMWEYDKDCEHT-UHFFFAOYSA-N 0.000 description 1
- OHOPPQTXVSRTMW-UHFFFAOYSA-N 3-methyl-4-(2-phenylethenyl)furan-2,5-dione Chemical compound O=C1OC(=O)C(C)=C1C=CC1=CC=CC=C1 OHOPPQTXVSRTMW-UHFFFAOYSA-N 0.000 description 1
- XOJWAAUYNWGQAU-UHFFFAOYSA-N 4-(2-methylprop-2-enoyloxy)butyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCCCOC(=O)C(C)=C XOJWAAUYNWGQAU-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical compound CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000001588 bifunctional effect Effects 0.000 description 1
- 238000012662 bulk polymerization Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 150000002194 fatty esters Chemical class 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000006224 matting agent Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- NZIDBRBFGPQCRY-UHFFFAOYSA-N octyl 2-methylprop-2-enoate Chemical compound CCCCCCCCOC(=O)C(C)=C NZIDBRBFGPQCRY-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000007591 painting process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野）
本発明は艶消し性にすぐれたスチレン系ｔ１脂組成物、
成形品およびその製造法に関し、より詳しくは艶消し性
にすぐれた成形体用スチレン系樹脂葡成物、該組成物を
射出成形してなる艶消し性にすぐれた表面を有するスチ
レン系ｍ脂成形品及び該成形品の′＃遣法に関する。[Detailed description of the invention] <Industrial application field> The present invention provides a styrenic T1 fat composition with excellent matte properties,
Regarding molded products and their manufacturing methods, more specifically, styrenic resin compositions for molded objects with excellent matte properties, and styrenic resin moldings having surfaces with excellent matte properties obtained by injection molding the compositions. Articles and how to use the molded articles.
〈従来の技術）
一般用ボリスチレン、耐熱性ポリスチレン、耐衝撃性ポ
リスチレン、アクリロニトリル・スチレン共重合体、ア
クリロニトリル・ブタジェン・スチレン共重合体、ポリ
メタクリルスチレンといったスチレン系樹脂は〜板状あ
るいは凹凸形状の成形品として種々の用途に用いられて
おり、特に近年高級感、防眩効果を高めるため艶消し表
面を有するものが普及してきている。従来艶消し表面を
有するスチレン系樹脂成形品を得るためには押出ロール
又は鋳込成形、圧縮成形、射出成形などの型表面を微細
に凹凸を設けて艶消し状にしたり、無機微粉体を混練押
出したり、あるいは成形後成形品に艶消しコーティング
をしたりすることが一般に行われている。<Prior art> Styrenic resins such as general purpose polystyrene, heat-resistant polystyrene, impact-resistant polystyrene, acrylonitrile-styrene copolymer, acrylonitrile-butadiene-styrene copolymer, and polymethacrylstyrene are molded into plate-like or uneven shapes. It is used as a product for various purposes, and in recent years in particular, products with a matte surface have become popular in order to enhance the sense of luxury and anti-glare effect. Conventionally, in order to obtain styrene resin molded products with a matte surface, the surface of an extrusion roll or a mold such as cast molding, compression molding, or injection molding must be made finely uneven to make it matte, or fine inorganic powder must be kneaded. It is common practice to extrude or apply a matte coating to the molded product after molding.
（発明が解決しようとする課題〉
しかしながら、従来の成形ロール又は金型などの成形型
表面に微細な凹凸を設けて艶消しとする場合には、その
艶消しの程度に応じて成形金型の表面加工を施こさなけ
ればならず広範な面積を均一な艶消し状態に維持するこ
とが難しく、またプレス加工、真空加工等の２次熱加工
が必要な場合には表面のｍ、ｍ凹凸が消失してしまうと
いう解決すべき課題を有していた。また艶消しコーティ
ングの場合には成形工程とは別に塗装工程が必要である
こと、広範囲な面積及び塗装しにくい部分に均一に塗装
できないなどの問題点を有していた。(Problems to be Solved by the Invention) However, when creating a matte surface by providing minute irregularities on the surface of a mold such as a conventional molding roll or metal mold, the shape of the mold must be adjusted according to the degree of matteness. It is difficult to maintain a uniform matte state over a wide area due to surface treatment, and if secondary heat processing such as press processing or vacuum processing is required, m, m unevenness on the surface may be difficult to maintain. In addition, matte coating requires a painting process separate from the molding process, and it is not possible to apply uniformly over a wide area or hard-to-paint areas. It had the following problems.
本発明はこのような従来の解決すべき課題に着目してな
されたもので、量産性にすぐれて２次熱加工を施こす必
要のない射出成形法において成形型表面を艶消し表面を
加工することなく防眩性、機械的強度のすぐれた艶消し
表面を有するスチレン系樹脂成形品を得ることを目的と
する。The present invention has been made by focusing on such conventional problems to be solved, and is a method for processing the surface of a mold to have a matte surface in an injection molding method that is excellent in mass production and does not require secondary heat processing. The purpose of the present invention is to obtain a styrenic resin molded product having a matte surface with excellent anti-glare properties and mechanical strength without any glare.
（課題を解決するための手段）
本発明者等は、量産性にすぐれかつ２次熱加工を龍こす
必要のない射出成形法において、鋭意検討を重ねた結果
、特定粒径の重合体微粒子をスチレン系樹脂に配合する
ことにより、上記課題を解決できることを見出し、本発
明を完成した。(Means for Solving the Problems) As a result of extensive research into injection molding, which has excellent mass productivity and does not require extensive secondary heat processing, the present inventors have developed polymer fine particles with a specific particle size. The present invention was completed based on the discovery that the above-mentioned problems could be solved by blending it with a styrene resin.
本発明によればこれらの目的は、スチレン系樹脂１０（
ｌ１部に対して１〜４０μｍの粒径を有する重合体微粒
子を１〜２０重量部含有してなる艶消し性にすぐれた成
形体用スチレン系樹脂組成物によって達成される。According to the present invention, these objectives are achieved by the styrenic resin 10 (
This is achieved by a styrenic resin composition for molded objects having excellent matte properties, which contains 1 to 20 parts by weight of fine polymer particles having a particle size of 1 to 40 μm per 1 part.
また、上記目的は上記スチレン系樹脂組成物を射出成形
してなる艶消し性のすぐれたスチレン系樹脂成形品によ
って達成される。Further, the above object is achieved by a styrene resin molded article having excellent matte properties, which is obtained by injection molding the styrenic resin composition.
更に、上記目的はスチレン系樹脂材料を射出成形してス
チレン系樹脂成形品を得る方法において、上記スチレン
系樹脂組成物を艶消し加工の腟こされていない成形型キ
ャビティ内に射出成形する艶消し性にすぐれたスチレン
系樹脂成形品の製造法によって達成される。Furthermore, the above object is a method for obtaining a styrenic resin molded article by injection molding a styrenic resin material, in which the styrenic resin composition is injection molded into a mold cavity that is not coated with a matte finish. This is achieved by a method for manufacturing styrene resin molded products with excellent properties.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
本発明でいうスチレン系樹脂とは、一般用ポリスチレン
、耐熱性ポリスチレン、耐衝撃性ポリスチレン、アクリ
ロニトリル・スチレン共重合体、アクリロニトリル・ブ
タジェン・スチレン共重合体およびポリメチルメタクリ
ルスチレン共重合体等をいい、射出成形、押出成形、圧
縮成形などができるコポリマーおよび／又はホモポリマ
ーであればよく、紫外線吸収剤、熱安定剤、着色剤、フ
ィラー等の添加剤を含んでいることはなんら差し支えな
い。The styrenic resin used in the present invention refers to general purpose polystyrene, heat-resistant polystyrene, impact-resistant polystyrene, acrylonitrile-styrene copolymer, acrylonitrile-butadiene-styrene copolymer, polymethylmethacrylstyrene copolymer, etc. Any copolymer and/or homopolymer that can be molded by injection molding, extrusion molding, compression molding, etc. may be used, and there is no problem in that it contains additives such as ultraviolet absorbers, heat stabilizers, colorants, and fillers.
本発明に用いる重合体粒子とは、架ａｍ合体微粒子又は
高重合度重合体微粒子等をいい、架橋ポリスチレン重合
体微粒子、架橋メタクリル酸エステル重合体微粒子、高
重合度メタクリル酸エステル重合体微粒子あるいはこれ
らの混合物が好ましく用いられる１本発明に好ましく用
いられる上記重合体微粒子としては、スチレン又はメタ
クリル酸エステルと架橋剤、あるいはスチレン又はメタ
クリル酸エステルを主単量体成分とする共重合可能な単
量体の混合物と架橋剤とを塊状重合、鋳込重合したもの
を機械粉砕した微粉体や懸濁重合して得られる微粒子、
メタクリル酸エステルまたはメタクリル酸エステルを主
単量体成分とする共重合可能な単量体の混合物を重合度
５０００以上、好ましくは８０００以上に塊状重合、鋳
込重合したものを機械粉砕した微粉体や懸濁重合して得
られる微粒子、またはこれらを混合したｆＲ′＃１子を
いう。The polymer particles used in the present invention refer to cross-linked am polymer particles, high polymerization degree polymer particles, etc., such as crosslinked polystyrene polymer particles, crosslinked methacrylate ester polymer particles, high polymerization degree methacrylate ester polymer particles, or the like. 1. The polymer fine particles preferably used in the present invention include styrene or methacrylic acid ester and a crosslinking agent, or a copolymerizable monomer containing styrene or methacrylic acid ester as the main monomer component. A fine powder obtained by mechanically crushing a mixture of the above and a crosslinking agent through bulk polymerization or cast polymerization, or fine particles obtained by suspension polymerization.
Methacrylic acid ester or a mixture of copolymerizable monomers containing methacrylic acid ester as the main monomer component is bulk polymerized or cast polymerized to a degree of polymerization of 5000 or more, preferably 8000 or more, and then mechanically pulverized to form a fine powder. It refers to fine particles obtained by suspension polymerization or fR'#1 particles obtained by mixing these particles.
本発明で使用されるメタクリル酸エステルとしては、メ
タクリル酸メチル、メタクリル酸オクチル、メタクリル
酸ステアリルなどの直鎖脂肪族エステル、メタクリル酸
ｔ ｅ ｒ ｔ、−ブチル、メタクリル酸２−エチルヘ
キシルなどの分岐脂肪族エステル、メタクリル酸アリル
などの不飽和エステルなどであり、メタクリル酸メチル
、メタクリル酸ステアリルなどの直鎖脂肪族エステルが
好ましく、メタクリル酸メチルが最も好ましい、スチレ
ン又はメタクリル酸エステルと共重合可能な単量体とし
ては、たとえば主成分以外の（メタ）アクリル酸アルキ
ルエステル（（メタ）アクリル酸アルキルエステルとは
アクリル酸アルキルエステル、およびメタクリル酸アル
キルエステルをいう、以下同じ、）、（メタ）アクリル
酸ヒドロキシアルキルエステル、（メタ）アクリル酸、
（メタ）アクリルニトリル、スチレン、α−メチルスチ
レン−無水マレイン等がある。また架橋剤としては特に
限定されないが、２個以上の不飽和基を有する架橋剤を
用いるのが好ましく、たとえばエチレングリコールジメ
タクリレート、ポリエチレングリコールジメタクリレー
ト、１，４−ブタンジオールジメタクリレート、ネオペ
ンチルゲルコールジメタクリレートなどの二官能性ジメ
タクリレートや、ジビニルベンゼン等が好ましく使用で
き、全モノマーに対し０．１〜５０重量％、好ましくは
５〜５０重量％の範囲で用いられる。これらの懸濁重合
による微粒子としては、特開昭４８−４９８３８号公報
、特開昭６２−１０１６１４号公報、特開平１−１４６
９１０号公報等で示された処方及び懸濁方法によって製
造されたもの、あるいは市販のものとして松本油脂製薬
株式会社：マツモトマイクロスフェア−Ｍ２Ｏ３（架橋
ポリメチルメタクリレート球状微粒子）、積水化成品工
業株式会社製：テクボリマーＭＢ（ポリメチルメタクリ
レート微小球状微粒子：高重合度タイプ）、同ＭＢＸ（
架橋ポリメチルメタクリレート微小球状微粒子）、チク
ポリマーＳＢＸ （架橋ポリスチレン微小球状微粒子〉
などが好ましく使用できる１本発明に用いられる微粒子
の粒径は１〜４０μｍ、好ましくは１〜２５μｍであり
、平均粒子径は３〜１５μｍ、好ましくは３〜１０μｍ
であり、更に好ましい微粒子の態様としては、重合＃微
粒子含有変動に対する艶消し外観の安定性および艶消し
表面の均一性の観点から粒径１０μｍ未満の粒子が重量
分布で６０％以上好ましくは７５％以上占めるものであ
る。ここでいう平均粒子径とは、各粒径を重量積算し全
重量の５０％にあたる粒径を意味し、たとえば重力沈降
法により透過式粒度分布測定器（■セイシン企業製：
５ＫＡ５０００）等により測定できる。艶消し状態の均
−性及び風合いの点から懸濁重合による球状微粒子が好
ましく使用され、粒径分布の狭い方が均一な艶消し性が
得られるのでより好ましく使用される０重合体機粒子の
粒径が４０μｍを超える場合には表面が細かく均一な艶
消し状態とならず好ましくない。The methacrylic acid esters used in the present invention include linear aliphatic esters such as methyl methacrylate, octyl methacrylate, and stearyl methacrylate, and branched fatty esters such as tert, -butyl methacrylate, and 2-ethylhexyl methacrylate. monomers copolymerizable with styrene or methacrylate, preferably linear aliphatic esters such as methyl methacrylate and stearyl methacrylate, and most preferably methyl methacrylate. Examples of polymers include (meth)acrylic acid alkyl esters other than the main component ((meth)acrylic acid alkyl esters refer to acrylic acid alkyl esters and methacrylic acid alkyl esters, the same shall apply hereinafter), (meth)acrylic acid Hydroxyalkyl ester, (meth)acrylic acid,
Examples include (meth)acrylonitrile, styrene, α-methylstyrene-maleic anhydride, and the like. Although the crosslinking agent is not particularly limited, it is preferable to use a crosslinking agent having two or more unsaturated groups, such as ethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, 1,4-butanediol dimethacrylate, neopentyl gel. Bifunctional dimethacrylates such as cold dimethacrylate, divinylbenzene, etc. are preferably used, and are used in an amount of 0.1 to 50% by weight, preferably 5 to 50% by weight based on the total monomers. These fine particles produced by suspension polymerization are disclosed in JP-A-48-49838, JP-A-62-101614, and JP-A-1-146.
Matsumoto Yushi Pharmaceutical Co., Ltd.: Matsumoto Microsphere-M2O3 (crosslinked polymethyl methacrylate spherical fine particles), manufactured by the formulation and suspension method shown in Publication No. 910, etc., or commercially available, Sekisui Plastics Co., Ltd. Manufactured by: Techbolymer MB (polymethyl methacrylate microspherical particles: high degree of polymerization type), Techbolymer MBX (
Cross-linked polymethyl methacrylate micro spherical particles), Chikupolymer SBX (cross-linked polystyrene micro spherical particles)
1. The particle size of the fine particles used in the present invention is 1 to 40 μm, preferably 1 to 25 μm, and the average particle size is 3 to 15 μm, preferably 3 to 10 μm.
A more preferable embodiment of the fine particles is that particles with a particle size of less than 10 μm account for 60% or more of the weight distribution, preferably 75%, from the viewpoint of the stability of the matte appearance against fluctuations in polymerization and fine particle content, and the uniformity of the matte surface. This accounts for the above. The average particle size here means the particle size that corresponds to 50% of the total weight by integrating each particle size by weight.
5KA5000), etc. From the point of view of the uniformity of the matte state and texture, spherical fine particles produced by suspension polymerization are preferably used, and zero polymer machine particles are more preferably used because the narrower the particle size distribution is, the more uniform the matteness can be obtained. If the particle size exceeds 40 μm, the surface will not be fine and uniformly matte, which is not preferable.
またその配合量は、目的とする用途によって異なるが、
良好な防眩性を得るためには、１．０〜２０′Ｍ量部、
好ましくは２．０〜１５重量部をスチレン系樹脂重合体
１００重量部あたり配合することが必要である。１．０
重量部未満の場合には表面のｍ消し状態が十分にならず
光沢度が上昇し美麗さが失なわれ、一方２０重量部を超
える場合には表面の艶消し状態は均一であるが、とくに
性能上好ましい影響を及ぼさずこれ以上添加しても価格
的に高価となり好ましくはない、また上記微粒子が架橋
系でなく重合度５０００未満の場合には、射出成形の混
練時機粒子が基材樹脂に溶解し艶消し状態が発現しなか
ったり、極めて不充分であったりして好ましくない０本
発明に用いる架橋ポリマー、高重合度ポリマーの艶消し
剤配合する事により艶消しが達成されるスチレン系樹脂
の代表的なものとしてポリスチレン、Ａｓ樹脂、ＡＢＳ
ｖＩＪ脂、ＭＳ樹脂等が挙げる事ができる。In addition, the amount added varies depending on the intended use, but
In order to obtain good anti-glare properties, 1.0 to 20'M parts,
Preferably, it is necessary to blend 2.0 to 15 parts by weight per 100 parts by weight of the styrene resin polymer. 1.0
If the amount is less than 20 parts by weight, the matte state of the surface will not be sufficient and the gloss will increase and beauty will be lost.If it exceeds 20 parts by weight, the matt state of the surface will be uniform, but especially It does not have a favorable effect on performance, and adding more than this increases the price and is not preferable. In addition, if the above-mentioned fine particles are not crosslinked and have a degree of polymerization of less than 5000, the kneading timing particles for injection molding may be added to the base resin. Styrenic resin that is undesirable because it dissolves and does not develop a matte state or is extremely insufficient.0 Styrenic resin that achieves mattness by blending a matting agent with a crosslinked polymer or a highly polymerized polymer used in the present invention. Typical examples include polystyrene, As resin, and ABS.
Examples include vIJ resin and MS resin.
本発明における艶消し性にすぐれた成形体用スチレン系
樹脂組成物とは、前記スチレン系ｔＭＦ１重合体１００
１１Ｌ量部に対して、１〜４０μｍの粒径を有する前記
重合＃微粒子を１〜２０重量部含有するものであり、た
とえばスチレン重合体および前記微粒子をヘンシェルミ
キサーなどで攪拌混合したものあるいは混合後押出成形
機にかけてベレット状したものなどをいう、前記組成物
は安定に保存するため、あるいは成形機への喰い込みを
良くするため、ペレット状にしたものが好ましく用いら
れる。In the present invention, the styrenic resin composition for molded objects having excellent matting properties is the styrene-based tMF1 polymer 100
It contains 1 to 20 parts by weight of the polymerized fine particles having a particle size of 1 to 40 μm per 11 L parts, for example, a styrene polymer and the fine particles are stirred and mixed with a Henschel mixer or the like, or after mixing. The above-mentioned composition is preferably formed into a pellet form by applying it to an extrusion molding machine, and is preferably used in the form of a pellet in order to store it stably or to make it easier to bite into the molding machine.
本発明の成形体用組成物は押出成形あるいはｑ（出成形
などの成形体用材料として使用されるが、押出成形では
樹脂を押出した後の成形ロールとの接触状態により艶消
し状態が左右されやすいため、このような問題のない射
出成形に好適であり、射出成形体用スチレン系ｖＩ４ｆ
ｆｉｆ組成物として好ましく使用される。The composition for molded bodies of the present invention is used as a material for molded bodies in extrusion molding or q (extrusion molding), but in extrusion molding, the matte state depends on the contact state with the molding roll after extruding the resin. Because it is easy to use, it is suitable for injection molding without such problems, and styrene-based vI4f for injection molded products is suitable for injection molding without such problems.
It is preferably used as a fif composition.
本発明における射出成形条件は本発明の本質的な構成要
件ではなく、通常の射出成形機を用い通常の射出条件下
で前記スチレン系樹脂組成物を艶消し加工の施こされて
いない成形型キャビティに射出成形することにより、艶
消し性にすぐれたスチレン系ｍ脂成形品を製造すること
ができ、たとえば前記ポリスチレン重合体および前記微
粒子をヘンシェルミキサーなどで攪拌混合したものある
いは混合後押出成形機にかけベレット状にしたものを射
出成形機で鏡面金型キャビティ内に射出成形することに
より、均一な艶消し表面を有するスチレン系樹脂成形品
を得ることができる。The injection molding conditions in the present invention are not essential constituent elements of the present invention, and the styrenic resin composition is molded into a mold cavity without matte processing under normal injection conditions using a normal injection molding machine. Styrenic resin molded products with excellent matte properties can be produced by injection molding, for example, by stirring and mixing the polystyrene polymer and the fine particles in a Henschel mixer or by applying the mixture to an extrusion molding machine. A styrenic resin molded product having a uniform matte surface can be obtained by injection molding the pellet into a mirror mold cavity using an injection molding machine.
上述の如くして得られる本発明のスチレン系樹脂成形品
は、良好な機械的強度と防眩性のすぐれた艶消し表面を
呈するが、基材樹脂と重合体微粒子の屈折率がほぼ等し
い時には成形後所定の表面部分を研磨することにより容
易に透明にすることができるので、部分的に透明部分を
有する成形品を製造することができ、また艷ありとした
い場合には研磨することにより容易に艶をもつ成形品を
製造することができ有用である。The styrenic resin molded article of the present invention obtained as described above exhibits a matte surface with good mechanical strength and excellent anti-glare properties, but when the refractive index of the base resin and the polymer fine particles are approximately equal, After molding, a predetermined surface area can be easily made transparent by polishing, so it is possible to manufacture a molded product with partially transparent parts, and if you want to have a ridge, it is easy to make it transparent by polishing. It is useful because it can produce molded products with a glossy finish.
（実施例） 以下、実施例により本発明をさらに具体的に説明する。(Example) Hereinafter, the present invention will be explained in more detail with reference to Examples.
なお、実施例、比較例における「％」および「部ｊはす
べて「重量％ノおよび「重量部Ｊをそれぞれ表わし、ま
た実施例および比較例により得られたスチレン系樹脂成
形品の性能は以下の方法により測定、評価した。In addition, "%" and "part j" in Examples and Comparative Examples all represent "% by weight" and "Part J by weight," and the performance of the styrene resin molded products obtained in Examples and Comparative Examples is as follows. Measured and evaluated using the method.
色且且Ｅ
室内において蛍光灯を試料上に反射させて目視観察し、
試料の艶消し状態を次の記号で表わした。Visually observe the color by reflecting a fluorescent light onto the sample indoors.
The matte state of the sample was expressed by the following symbol.
○・・・・・・蛍光灯の輪郭が認められないかほとんど
認められない。○...The outline of the fluorescent lamp is not recognized or is hardly recognized.
Δ・・・・・・蛍光灯の輪郭は認められるが不明瞭であ
り表面の凹凸がある。Δ: The outline of the fluorescent lamp is recognized, but it is unclear and the surface is uneven.
×・・・・・・蛍光灯の輪郭が明瞭に認められ、表面の
凹凸がほとんどない。×: The outline of the fluorescent lamp is clearly recognized, and there are almost no irregularities on the surface.
監艷盈盪亙１文
ＪＴＳＫ７１０５に準拠して積分球式光線透過率測定装
？ｌ！（■村上色彩研究所ト光線透過率・反射率計ＲＭ
−１５）により測定し、全光線透過率、平行光線透過率
を算出した。Integrating sphere type light transmittance measuring device in accordance with JTSK7105? l! (■Murakami Color Research Institute Light Transmittance/Reflectance Meter RM
-15), and the total light transmittance and parallel light transmittance were calculated.
Ｌ仮亙
ＪＴＳＫ７１０５の光沢度測定に準拠して光沢度計（ス
ガ試験機■製：ＳＭカラーコンピューター）により６０
”−６０部反射にて測定した。60 by a gloss meter (manufactured by Suga Test Instruments: SM Color Computer) in accordance with the gloss measurement of
”-60 parts was measured by reflection.
友皿皿上
Ｊ Ｉ ５ＢＯ６０１に準拠して表面粗さ計（■小板研
究所：万能表面形状測定１１１ｓＥ−３Ｃ）により十点
平均粗さ（Ｒｚ）を測定した。Ten-point average roughness (Rz) was measured using a surface roughness meter (■ Koita Research Institute: Universal Surface Profile Measurement 111sE-3C) in accordance with J I 5BO601.
実施例１
ポリスチレン（三菱モンサント■製：ダイヤレックスＨ
Ｆ−７７−以下同じ）１００部に対して、２〜２０ Ｂ
ｍの粒度分布を有し平均粒子径８μｍ（１０μｍ未満
の粒子は重量分布で７８％）の架橋ポリメチルメタクリ
レート微粒子（８［水化成品工業特製：テクボリマーＭ
ＢＸ−８）を１部、２部、５部、１０部、１５部、２０
部それぞれ添加しヘンシェルミキサーで混合攪拌の後、
それぞれ押出ＩＩ（中央機械製作新製、ＶＳＫ−４０＞
で押出してペレット化し、このペレットを鏡面のキャビ
ティを有する金型を取り付けた射出成形ｍ＜東芝機械■
製： ＴＳ−２５ＢＰ）により成形温度２００〜２４０
℃、金型温度５０℃の条件で成形し、厚さ２＋ｗ＋の平
板成形品を得た。Example 1 Polystyrene (manufactured by Mitsubishi Monsanto ■: Dialex H
F-77- (same below)) 2 to 20 B per 100 copies
Cross-linked polymethyl methacrylate fine particles (8 [Specially manufactured by Suikaseihin Kogyo: Techborimer M
BX-8) 1 part, 2 parts, 5 parts, 10 parts, 15 parts, 20 parts
After adding each part and stirring with a Henschel mixer,
Extrusion II (newly manufactured by Chuo Kikai Seisaku, VSK-40)
The pellets are then extruded into pellets by injection molding using a mold with a mirror-like cavity.
Molding temperature: 200 to 240 (manufactured by: TS-25BP)
℃ and mold temperature of 50℃ to obtain a flat plate molded product having a thickness of 2+w+.
これらの成形品の性能評価結果は第−表に示すが、細か
く均一な艶消し表面を有するものが得られた。The performance evaluation results of these molded products are shown in Table 1, and the molded products had a fine and uniform matte surface.
実施例２
ポリスチレン１００部に対して重合度９３００で１〜２
４μｍの粒度分布を有し平均粒子径７μｍ （１０μｍ
未満の粒子は重量分布で８２％）の高重合度ポリメチル
メタクリレート微粒子（ｍ水化成品工業＠製チクポリマ
ーＭＢ−８＞を１部、２部、５部、１０部、１５部−２
０部それぞれ押出機でペレット化し、このペレットを実
施例１と同様に射出成形し厚さ２−の平板成形品を得た
。Example 2 Polymerization degree of 9300 and 1 to 2 with respect to 100 parts of polystyrene
It has a particle size distribution of 4 μm and an average particle size of 7 μm (10 μm
1 part, 2 parts, 5 parts, 10 parts, 15 parts of high polymerization degree polymethyl methacrylate fine particles (m-sui Kaseihin Kogyo@ Chikupolymer MB-8>) with a weight distribution of less than 82%)
0 parts of each were pelletized using an extruder, and the pellets were injection molded in the same manner as in Example 1 to obtain a flat plate molded product with a thickness of 2 mm.
これらの成形品の性Ｆｌ評価結果を第１表に示すが、細
かく均一な艶消し表面を有するものが得られた。Table 1 shows the results of evaluating the properties of these molded products, and it was found that the molded products had a fine and uniform matte surface.
実施例３
ポリスチレン１００部に対して一１〜１６μｍの粒度分
布を有し平均粒径７μｍ（１０μｍ未満の粒子は重量分
布で９１％〉の架橋ポリスチレン重合体微粒子（Ｍ水化
成品工業■製：テクボリマ−８ＢＸ６）を１０部添加し
、実ａＰＩｉと同様にして平板成形品を得た。ＡｌｔＩ
かく均一な艶消し表面を有するものが得られた。Example 3 Cross-linked polystyrene polymer fine particles having a particle size distribution of 11 to 16 μm based on 100 parts of polystyrene and an average particle size of 7 μm (particles smaller than 10 μm account for 91% in weight distribution) (manufactured by M Water Kaseihin Kogyo): 10 parts of Techvolimer-8BX6) was added and a flat plate molded product was obtained in the same manner as the actual aPIi.AltI
A product with a uniform matte surface was thus obtained.
実施例４
ポリスチレン１００部に対して、４〜４０μｍの粒度分
布を有し平均粒子径２０μｍ（１０μｍ未満の粒子は重
量分布で４％）の高重合度ポリメチルメタクリレート微
粒子を１０部添加し、実施例１と同様にして平板成形品
を得た。均一な艶消し表面を有するものが得られた。Example 4 To 100 parts of polystyrene, 10 parts of highly polymerized polymethyl methacrylate fine particles having a particle size distribution of 4 to 40 μm and an average particle size of 20 μm (particles less than 10 μm are 4% in weight distribution) were added, and the experiment was carried out. A flat plate molded product was obtained in the same manner as in Example 1. A uniform matte surface was obtained.
実施例５
アクリロニトリル・ブタジェン・スチレン共重合体（東
し■製：トヨラック３００）、アクリルニトリル・スチ
レン共重合体（ダイセル化学■製：セビアンーＮ０２０
）−ポリメタクリルスチレン（新日鉄化学■製：エスチ
レジＭＳ−３００）の、いずれか１種１００部に対し、
架橋ポリメチルメタクリレート微粒子（ＭｎＸ−８）
、高重合度ポリメチルメタクリレート微粒子（ＭＢ−８
＞ 、および／または架橋ポリスチレン微粒子（ＳＢＸ
−６）それぞれ１０部を添加し、実施例１と同様にして
平板成形品を得た。いずれも細かく均一な艶消し表面を
有するものが得られた。Example 5 Acrylonitrile-butadiene-styrene copolymer (manufactured by Toshi ■: Toyolac 300), acrylonitrile-styrene copolymer (manufactured by Daicel Chemical ■: Sevian-N020)
)-Polymethacrylstyrene (manufactured by Nippon Steel Chemical ■: Estyregi MS-300), for 100 parts of any one type,
Crosslinked polymethyl methacrylate fine particles (MnX-8)
, high polymerization degree polymethyl methacrylate fine particles (MB-8
>, and/or crosslinked polystyrene fine particles (SBX
-6) 10 parts of each were added and a flat plate molded product was obtained in the same manner as in Example 1. All of them had fine and uniform matte surfaces.
実施例６
５Ｊのセパラブルフラスコに、懸濁分散剤として重合度
２１２０、鹸化度７９．４％のポリビニルアルコール（
［クラレ製ＰＴＡ４２０）１８゜３７ｇを２６２５ｍＪ
の蒸溜水に溶解させ、モノマー系としてメタクリル酸ス
テアリル３００ｍ才、エチレングリコールジメタクリレ
ー）３００ｍｊ、トルエン４００ｍｊ、ラウロイルパー
オキサイド１．２００ｇの溶液を加えた。この混合液を
ラボディスパーザ−（三田村理研■製Ｘ−１０２０型）
を用い、顕Ｗｋ鎖で観察した粒径が最大のもので２０μ
ｍになるまで分散させた。フラスコに温度計、攪拌装置
、冷却管をとりつけ、窒素気流下８０℃で６時間重合反
応を行なった。得られたスラリーを吸引枦遇し、戸別し
た微粒子を再び蒸溜水に分散させて付着しているポリビ
ニルアルコールを洗浄し濾過した。これを１００℃で２
日間真空乾燥して希釈剤のトルエンを蒸発させ光学顕微
鏡で観察したところ粒径が２〜２０μｍで平均粒子径７
μｍ（１０μｍ未満の粒子は重量分布で８４％以上）の
架橋メタクリル酸エステル重合体微粒子を得た。Example 6 In a 5J separable flask, polyvinyl alcohol (with a degree of polymerization of 2120 and a degree of saponification of 79.4%) was added as a suspension dispersant.
[Kuraray PTA420) 18°37g to 2625mJ
A solution containing 300 mj of stearyl methacrylate, 300 mj of ethylene glycol dimethacrylate, 400 mj of toluene, and 1.200 g of lauroyl peroxide as monomers was added. Apply this mixture to a lab body spazer (Mitamura Riken model X-1020).
The maximum particle size observed with the optical Wk chain was 20μ.
It was dispersed until m. A thermometer, a stirring device, and a cooling tube were attached to the flask, and a polymerization reaction was carried out at 80° C. for 6 hours under a nitrogen stream. The obtained slurry was subjected to suction, and the fine particles separated from each other were dispersed again in distilled water to wash off the attached polyvinyl alcohol and filtered. 2 at 100℃
After drying under vacuum for several days to evaporate the diluent toluene and observing it with an optical microscope, the particle size was 2 to 20 μm, with an average particle size of 7.
Crosslinked methacrylic acid ester polymer fine particles having a particle diameter of 84% or more in terms of weight distribution were obtained.
ポリスチレン１００部に対して、上記架橋メタクリル酸
エステル重合体微粒子を２部、５部、１０部、１５部を
それぞれ添加し実施例１と同様にして混合ペレット化し
て成形し厚さ２ｍの平板成形品を得た。これらの成形品
はいずれも細かく均一な艶消し表面を有するものが得ら
れた。To 100 parts of polystyrene, 2 parts, 5 parts, 10 parts, and 15 parts of the above-mentioned crosslinked methacrylic acid ester polymer fine particles were added, mixed into pellets in the same manner as in Example 1, and molded into a flat plate with a thickness of 2 m. I got the item. All of these molded products had fine and uniform matte surfaces.
比較＃４１
ポリスチレン１００部に対し、１０〜２００μｍの粒度
分布を有し平均粒子径５０μｍの高重合度ポリメチルメ
タクリレート微粒子１０部を添加し、実施例１と同様に
して平板成形品を得た。均一な艶消し表面にはならず微
粒子が凝集したようなマダラ状の表面を示した。Comparison #41 To 100 parts of polystyrene, 10 parts of highly polymerized polymethyl methacrylate fine particles having a particle size distribution of 10 to 200 μm and an average particle size of 50 μm were added, and a flat plate molded product was obtained in the same manner as in Example 1. The surface did not become uniformly matte, but instead showed a mottled surface as if fine particles had aggregated together.
比較例２
ポリスチレン１００部に対し、３０〜２００ Ｂｍの粒
度分布を有し平均粒子径１００μｍの架橋ポリメタクリ
レート微粒子（積木化成品工業１１１１：テクボリマー
ＭＢＸ−１００）１０部を添加し、実施例１と同様にし
て、平板成形品を得た。均一な艶消し表面にならずマダ
ラ状の表面を示した。Comparative Example 2 To 100 parts of polystyrene, 10 parts of crosslinked polymethacrylate fine particles having a particle size distribution of 30 to 200 Bm and an average particle diameter of 100 μm (Building Plastics Industry Co., Ltd. 1111: Tekbolimer MBX-100) were added, and Example 1 and A flat plate molded product was obtained in the same manner. The surface did not become uniformly matte, but showed a spotted surface.
比較例３
型転写シートの性能を第１表に示す、型転写シートＡは
艶消し状態のかるいもの、型転写シートＢは艶消し状態
のきついものの例である。Comparative Example 3 The performance of the mold transfer sheets is shown in Table 1. The mold transfer sheet A is a light matte sheet, and the mold transfer sheet B is a hard matte sheet.
以下余白。Margin below.
（発明の効果）
本発明は以上説明したように、スチレン系樹脂１００重
量部に対して一１〜４０μｍの粒径を有する重合体微粒
子を１〜２０重証部含有してなる艶消し性にすぐれた成
形体用スチレン系樹脂組成物であるから、配合する重合
体微粒子の粒径および添加量により艶消し状態を変化さ
せることができるので、簡便に種々の艶消し状態を有す
る成形体用の組成物を提供することができる。特に量産
性にすぐれた射出成形材料として有用である。(Effects of the Invention) As explained above, the present invention provides a matte material containing 1 to 20 parts of polymer fine particles having a particle size of 1 to 40 μm per 100 parts by weight of a styrene resin. Since it is an excellent styrenic resin composition for molded objects, the matte state can be changed depending on the particle size and amount of added polymer fine particles, so it can be easily used for molded objects with various matte states. A composition can be provided. It is particularly useful as an injection molding material with excellent mass productivity.
また、上記艶消し性にすぐれた成形体用スチレン系樹脂
組成物を射出成形してなる艶消し性にすぐれたスチレン
系樹脂成形品であるから、２成熟加工を施こす必要がな
い射出成形品であるので大量に安価に供給でき、種々の
艶消し表面を有する照明カバー、デイスプレー、グレー
ジングあるいは計器カバー等として有用である。特に基
材樹脂として透明性を有するスチレン系樹脂を使用した
場合には透光性にすぐれ、省エネ効果の高い成形品とし
て有用であり、また透明基体樹脂と重合体微粒子の屈折
率がほぼ等しい場合には、成形後所定の表裏部分を研磨
することにより容易に透明にすることができるので、部
分的に透明部分を有する成形品を製造することができる
ので有用である・更に本発明は、上記スチレン系樹脂組
成物を艶消し加工の施こされていない成形金型キヤビテ
イ内に射出成形する艶消し性にすぐれたスチレン系樹脂
成形品の製造方法であるから、キャビテイ面を＠細加工
するとか、十分に鏡面に研磨する必要がなく安価に金型
を製作することができ、また一つの金型で成形材料を変
えることにより種々の艶消し品と鏡面品を製造できるの
で、安価、簡便にかつ多種類の艶消し表面状態を有する
スチレン系樹脂成形品を提供することができ有利である
。In addition, since it is a styrenic resin molded product with excellent matte properties obtained by injection molding the above-mentioned styrenic resin composition for molded objects with excellent matte properties, it is not necessary to perform 2-maturation processing. Therefore, it can be supplied in large quantities at low cost, and is useful as lighting covers, displays, glazing, instrument covers, etc. with various matte surfaces. In particular, when a transparent styrene resin is used as the base resin, it has excellent light transmittance and is useful as a molded product with a high energy-saving effect, and when the refractive index of the transparent base resin and the polymer fine particles are almost the same. This invention is useful because it can be easily made transparent by polishing the predetermined front and back parts after molding, so it is possible to manufacture molded products that have partially transparent parts. This is a method for manufacturing styrene resin molded products with excellent matte properties, in which a styrene resin composition is injected into the cavity of a molding die that has not been subjected to matte processing, so the cavity surface is finely processed. It is possible to manufacture molds at low cost without the need for thorough mirror polishing, and by changing the molding material in the same mold, various matte and mirror-finish products can be manufactured, making it inexpensive and easy. In addition, it is possible to provide styrenic resin molded products having a wide variety of matte surface conditions.
Claims (7)
μｍの粒径を有する重合体微粒子１〜２０重量部含有し
てなる艶消し性にすぐれた成形体用スチレン系樹脂組成
物。(1) 1 to 40 parts by weight of styrene resin
A styrenic resin composition for a molded object having excellent matting properties and containing 1 to 20 parts by weight of fine polymer particles having a particle size of .mu.m.
求項１記載のスチレン系樹脂組成物。(2) The styrenic resin composition according to claim 1, wherein the fine particles are crosslinked polystyrene polymer fine particles.
および／または高重合度メタクリル酸エステル重合体微
粒子である請求項１記載のスチレン系樹脂組成物。(3) The styrenic resin composition according to claim 1, wherein the fine particles are crosslinked methacrylic ester polymer fine particles and/or highly polymerized methacrylic ester polymer fine particles.
橋重合体微粒子および／又は高重合体微粒子である請求
項１記載のスチレン系樹脂組成物。(4) The styrenic resin composition according to claim 1, wherein the fine particles are crosslinked polymer fine particles and/or high polymer fine particles containing methyl methacrylate as a main component.
よび／又は高重合度ポリメチルメタクリレート微粒子で
ある請求項１記載のスチレン系樹脂組成物。(5) The styrenic resin composition according to claim 1, wherein the fine particles are crosslinked polymethyl methacrylate fine particles and/or highly polymerized polymethyl methacrylate fine particles.
出成形してなる艶消し性にすぐれたスチレン系樹脂成形
品。(6) A styrenic resin molded article with excellent matte properties obtained by injection molding the styrenic resin composition according to claims 1 to 5.
脂成形品を得る方法において、請求項１乃至５記載のス
チレン系樹脂組成物を艶消し加工を施こされていない成
形型キャビティ内に射出成形することを特徴とする艶消
し性にすぐれたスチレン系樹脂成形品の製造法。(7) In a method for obtaining a styrenic resin molded article by injection molding a styrenic resin material, the styrenic resin composition according to any one of claims 1 to 5 is injected into a mold cavity that has not been subjected to matte processing. A method for manufacturing styrene resin molded products with excellent matte properties.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20634989A JPH0368643A (en) | 1989-08-09 | 1989-08-09 | Styrenic resin composition for molded item having excellent delustered appearance, molding therefrom, and preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20634989A JPH0368643A (en) | 1989-08-09 | 1989-08-09 | Styrenic resin composition for molded item having excellent delustered appearance, molding therefrom, and preparation thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0368643A true JPH0368643A (en) | 1991-03-25 |
Family
ID=16521837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20634989A Pending JPH0368643A (en) | 1989-08-09 | 1989-08-09 | Styrenic resin composition for molded item having excellent delustered appearance, molding therefrom, and preparation thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0368643A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5395882A (en) * | 1992-09-24 | 1995-03-07 | Rohm Gmbh Chemische Fabrik | Light-scattering polystyrene molding compounds, and molded articles produced therefrom |
-
1989
- 1989-08-09 JP JP20634989A patent/JPH0368643A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5395882A (en) * | 1992-09-24 | 1995-03-07 | Rohm Gmbh Chemische Fabrik | Light-scattering polystyrene molding compounds, and molded articles produced therefrom |
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