CN102532738B - Styrene-acrylonitrile copolymer resin composition - Google Patents

Styrene-acrylonitrile copolymer resin composition Download PDF

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CN102532738B
CN102532738B CN 201110132826 CN201110132826A CN102532738B CN 102532738 B CN102532738 B CN 102532738B CN 201110132826 CN201110132826 CN 201110132826 CN 201110132826 A CN201110132826 A CN 201110132826A CN 102532738 B CN102532738 B CN 102532738B
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styrene
pentaerythritol
tetramethylolmethane
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acrylonitrile
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CN102532738A (en
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林全明
郭铭洲
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Chi Mei Corp
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Abstract

本发明公开了一种苯乙烯-丙烯腈共聚树脂组成物,所述苯乙烯-丙烯腈共聚树脂组成物通过加入季戊四醇的酯类混合物来降低树脂的离模力以及雾度,以得到较好的树脂成品。

Figure 201110132826

The invention discloses a styrene-acrylonitrile copolymer resin composition. The styrene-acrylonitrile copolymer resin composition reduces the mold release force and haze of the resin by adding an ester mixture of pentaerythritol to obtain better Resin finished product.

Figure 201110132826

Description

苯乙烯-丙烯腈共聚树脂组成物Styrene-acrylonitrile copolymer resin composition

技术领域 technical field

本发明涉及一种苯乙烯-丙烯腈共聚树脂组成物,特别涉及一种包含季戊四醇的酯类混合物的苯乙烯-丙烯腈共聚树脂组成物。The invention relates to a styrene-acrylonitrile copolymer resin composition, in particular to a styrene-acrylonitrile copolymer resin composition containing an ester mixture of pentaerythritol.

背景技术 Background technique

苯乙烯-丙烯腈共聚树脂组成物是一种具有良好耐化性、强度及加工成型性的材料,尤其是透明的苯乙烯-丙烯腈共聚树脂更可应用在透明化妆品容器等家庭用品、家电制品以及机器或容器的外壳。Styrene-acrylonitrile copolymer resin composition is a material with good chemical resistance, strength and processability, especially transparent styrene-acrylonitrile copolymer resin can be used in household products such as transparent cosmetic containers and household appliances and the casing of a machine or container.

对于苯乙烯-丙烯腈共聚树脂组成物,由于加工条件对成品的薄化以及大型化日益严苛,成型品的加工流动性以及树脂成形时的离模性均是须符合加工要求的重要特性。例如,已知的是,可在苯乙烯树脂中加入硬脂酸钙、硬脂酸锌或季戊四醇的酯类化合物来混练,使树脂在离开模子时所需要的力减小。然而,虽然在苯乙烯-丙烯腈共聚树脂中添加上述添加物可改善树脂的加工性和离模性,但上述添加物会导致树脂的透明性变差,而无法得到具有良好透明度的苯乙烯-丙烯腈共聚树脂。For styrene-acrylonitrile copolymer resin compositions, due to the increasingly stringent processing conditions for the thinning and upsizing of the finished product, the processing fluidity of the molded product and the release property during resin molding are important characteristics that must meet the processing requirements. For example, it is known that calcium stearate, zinc stearate or esters of pentaerythritol can be kneaded in styrene resins to reduce the force required for the resin to leave the mold. However, although the addition of the above-mentioned additives to the styrene-acrylonitrile copolymer resin can improve the processability and mold release properties of the resin, the above-mentioned additives will cause the transparency of the resin to deteriorate, and it is impossible to obtain a styrene-acrylonitrile copolymer with good transparency. Acrylonitrile copolymer resin.

发明内容 Contents of the invention

鉴于此,本发明的目的是提供一种苯乙烯-丙烯腈共聚树脂组成物,以改善树脂透明度变差的问题。In view of this, the object of the present invention is to provide a styrene-acrylonitrile copolymer resin composition, so as to improve the problem of poor transparency of the resin.

因此,为实现上述目的,根据本发明的一种苯乙烯-丙烯腈共聚树脂组成物包含:100重量份的苯乙烯-丙烯腈共聚物以及0.05~0.5重量份的季戊四醇的酯类混合物。其中,该苯乙烯-丙烯腈共聚物含丙烯腈单体单元30~35重量%,较佳为32~34重量%。另外,季戊四醇的酯类混合物包含季戊四醇单脂肪酸酯、季戊四醇二脂肪酸酯、季戊四醇三脂肪酸酯以及季戊四醇四脂肪酸酯,并且苯乙烯-丙烯腈共聚树脂组成物的雾度小于1%。Therefore, to achieve the above object, a styrene-acrylonitrile copolymer resin composition according to the present invention comprises: 100 parts by weight of styrene-acrylonitrile copolymer and 0.05-0.5 parts by weight of a mixture of pentaerythritol esters. Wherein, the styrene-acrylonitrile copolymer contains 30-35% by weight of acrylonitrile monomer units, preferably 32-34% by weight. In addition, the ester mixture of pentaerythritol includes pentaerythritol mono-fatty acid ester, pentaerythritol di-fatty acid ester, pentaerythritol tri-fatty acid ester and pentaerythritol tetra-fatty acid ester, and the haze of the styrene-acrylonitrile copolymer resin composition is less than 1%.

本发明的苯乙烯-丙烯腈共聚物可由苯乙烯单体与丙烯腈单体共聚合而成。苯乙烯单体的具体例可为:苯乙烯、α-甲基苯乙烯、对-甲基苯乙烯、间-甲基苯乙烯、邻-甲基苯乙烯、乙基苯乙烯、2,4-二甲基苯乙烯、对-第三丁基苯乙烯、α-甲基-对甲基苯乙烯、溴-苯乙烯、二溴-苯乙烯、2,4,6-三溴苯乙烯等,较佳为苯乙烯、α-甲基苯乙烯。上述苯乙烯单体可单独使用或多种组合使用。The styrene-acrylonitrile copolymer of the present invention can be formed by copolymerizing styrene monomer and acrylonitrile monomer. Specific examples of styrene monomers can be: styrene, α-methylstyrene, p-methylstyrene, m-methylstyrene, o-methylstyrene, ethylstyrene, 2,4- Dimethylstyrene, p-tert-butylstyrene, α-methyl-p-methylstyrene, bromo-styrene, dibromo-styrene, 2,4,6-tribromostyrene, etc. Styrene and α-methylstyrene are preferred. The above-mentioned styrene monomers may be used alone or in combination of multiple kinds.

丙烯腈单体可为:丙烯腈或α-甲基丙烯腈,上述丙烯腈单体可单独使用或多种组合使用。The acrylonitrile monomer can be: acrylonitrile or α-methacrylonitrile, and the above acrylonitrile monomers can be used alone or in combination.

本发明的苯乙烯-丙烯腈共聚树脂组成物中所含的季戊四醇的酯类混合物为季戊四醇与羧酸化合物反应而成的酯类化合物。其中,羧酸化合物包含脂肪酸化合物,可为:月桂酸(又称十二烷酸,lauric acid)、棕榈酸(又称十六烷酸,palmitic acid)、硬脂酸(又称十八烷酸,stearic acid)、花生四烯酸(arachidonic acid)、山嵛酸(又称二十二烷酸,behenic acid)、二十四烷酸(lignoceric acid)、虫蜡酸(又称二十七烷酸,cerotic acid)、褐煤酸(又称二十九烷酸,montanic acid)、油酸(又称十八烯酸,oleic acid)、反油酸(elaidicacid)、芥子酸(erucic acid)、亚麻仁油酸(linoleic acid)、次亚麻仁油酸(linolenicacid)、草酸(又称乙二酸,oxalic acid)、丙二酸(malonic acid)、丁二酸(succinicacid)、戊二酸(glutaric acid)、己二酸(adipic acid)、庚二酸(pimelic acid)、辛二酸(suberic acid)、壬二酸(azelaic acid)、癸二酸(sebacic acid)、壬烷二羧酸(nonane dicarboxylic acid)、癸烷二羧酸(decane dicarboxylic acid)、十一烷二酸(undecane dicarboxylic acid)、十四烷双酸(dodecanedicarboxylicacid)、二十二烷二酸(eicosane dicarboxylic acid)、顺丁烯二酸(maleic acid)、反丁烯二酸(fumaric acid)、顺丁烯二酸(citraconic acid)、甲基反丁烯二酸(mesaconic acid)、次甲基丁二烯(itconic acid)、环丙烷羧酸(cycloproanedicarboxylic acid)、环丁烷羧酸(cyclobutane dicarboxylic acid)、环十五烷羧酸(cyclopentadiane dicarboxylic acid)、樟脑酸(camphor acid)、六氢邻苯甲酸(hexahydrophthalic acid)、苯二甲酸(phthalic acid)、四苯二甲酸(terephthalic acid)、异苯二甲酸(isophthalic acid)、萘二甲酸(naphthalicacid)、二苯基-o,o’-二羧酸(diphenyl-o,o’-dicarboxyl acid)等,上述羧酸化合物可单独使用或多种组合使用。The ester mixture of pentaerythritol contained in the styrene-acrylonitrile copolymer resin composition of the present invention is an ester compound obtained by reacting pentaerythritol and a carboxylic acid compound. Among them, the carboxylic acid compound includes a fatty acid compound, which can be: lauric acid (also known as dodecanoic acid, lauric acid), palmitic acid (also known as hexadecanoic acid, palmitic acid), stearic acid (also known as octadecanoic acid) , stearic acid), arachidonic acid (arachidonic acid), behenic acid (also known as behenic acid, behenic acid), lignoceric acid (lignoceric acid), insectic acid (also known as heptacane cerotic acid), montanic acid (also known as nonacosanoic acid, montanic acid), oleic acid (also known as octadecenoic acid, oleic acid), elaidic acid (elaidic acid), erucic acid (erucic acid), flax Linoleic acid, linolenic acid, oxalic acid (also known as oxalic acid), malonic acid, succinic acid, glutaric acid ), adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, nonane dicarboxylic acid acid), decane dicarboxylic acid, undecane dicarboxylic acid, dodecane dicarboxylic acid, eicosane dicarboxylic acid, maleic acid Maleic acid, fumaric acid, citraconic acid, mesaconic acid, itconic acid, cyclic Cycloproanedicarboxylic acid, cyclobutane dicarboxylic acid, cyclopentadane dicarboxylic acid, camphor acid, hexahydrophthalic acid, phthalic acid Formic acid (phthalic acid), tetraphthalic acid (terephthalic acid), isophthalic acid (isophthalic acid), naphthalene dicarboxylic acid (naphthalic acid) thalicacid), diphenyl-o, o'-dicarboxylic acid (diphenyl-o, o'-dicarboxyl acid), etc., the above-mentioned carboxylic acid compounds can be used alone or in combination.

本发明的苯乙烯-丙烯腈共聚树脂组成物的季戊四醇的酯类混合物具体的例子可为脂肪酸化合物混合物:例如约45重量%的硬脂酸、约55重量%的棕榈酸。因此该酯类混合物除了包含(a)季戊四醇与硬脂酸形成的酯类化合物:季戊四醇单硬脂酸酯(pentaerythritol monostearate)、季戊四醇二硬脂酸酯(pentaerythritol distearate)、季戊四醇三硬脂酸酯(pentaerythritol tristearate)以及季戊四醇四硬脂酸酯(pentaerythritol tetrastearate)之外,还会含有(b)季戊四醇与棕榈酸形成的酯类化合物、和/或(c)季戊四醇同时与硬脂酸以及棕榈酸形成的酯类化合物。上述季戊四醇的酯类混合物的制造,可根据酯化反应过程,特别可使用酯化程序的触媒,例如:有机锡化合物,而反应中醇类及脂肪酸混合物的使用量,可按照不同的种类及化学计量而定。A specific example of the pentaerythritol ester mixture of the styrene-acrylonitrile copolymer resin composition of the present invention can be a mixture of fatty acid compounds: for example, about 45% by weight of stearic acid and about 55% by weight of palmitic acid. Therefore, the ester mixture includes (a) ester compounds formed by pentaerythritol and stearic acid: pentaerythritol monostearate (pentaerythritol monostearate), pentaerythritol distearate (pentaerythritol distearate), pentaerythritol tristearate ( Pentaerythritol tristearate) and pentaerythritol tetrastearate (pentaerythritol tetrastearate), will also contain (b) esters of pentaerythritol and palmitic acid, and/or (c) pentaerythritol and stearic acid and palmitic acid Esters. The manufacture of the above-mentioned ester mixture of pentaerythritol can be based on the esterification reaction process, especially the catalyst of the esterification process, such as organotin compounds, and the amount of alcohols and fatty acid mixtures used in the reaction can be used according to different types and chemical substances. Depends on metering.

此外,本发明的苯乙烯-丙烯腈共聚树脂组成物中,季戊四醇二脂肪酸酯与季戊四醇三脂肪酸酯之和例如占季戊四醇的酯类混合物的重量百分比为大于82%。另外,季戊四醇四取代酯例如占季戊四醇的酯类混合物的重量百分比为小于6%。In addition, in the styrene-acrylonitrile copolymer resin composition of the present invention, the sum of pentaerythritol di-fatty acid ester and pentaerythritol tri-fatty acid ester accounts for more than 82% by weight of the pentaerythritol ester mixture. In addition, the tetra-substituted pentaerythritol ester, for example, accounts for less than 6% by weight of the pentaerythritol ester mixture.

此外,本发明的根据季戊四醇的酯类混合物中的氢氧根的量,还提出一种苯乙烯-丙烯腈共聚树脂组成物,其包含:100重量份的苯乙烯-丙烯腈-共聚物以及0.05~0.5重量份的季戊四醇的酯类混合物。其中,该苯乙烯-丙烯腈共聚物含丙烯腈单体单元30~35重量%,较佳为32~34重量%。另外,季戊四醇的酯类混合物包含季戊四醇单脂肪酸酯、季戊四醇二脂肪酸酯、季戊四醇三脂肪酸酯以及季戊四醇四脂肪酸酯,并且每1克季戊四醇的酯类混合物中,氢氧根的量大于2.54×10-3摩尔。In addition, according to the amount of hydroxide in the ester mixture of pentaerythritol, the present invention also proposes a styrene-acrylonitrile copolymer resin composition, which comprises: 100 parts by weight of styrene-acrylonitrile-copolymer and 0.05 -0.5 parts by weight of the ester mixture of pentaerythritol. Wherein, the styrene-acrylonitrile copolymer contains 30-35% by weight of acrylonitrile monomer units, preferably 32-34% by weight. In addition, the ester mixture of pentaerythritol includes pentaerythritol mono-fatty acid ester, pentaerythritol di-fatty acid ester, pentaerythritol tri-fatty acid ester and pentaerythritol tetra-fatty acid ester, and the amount of hydroxide radicals per 1 gram of pentaerythritol ester mixture is greater than 2.54 ×10 -3 mol.

此外,本发明进一步根据季戊四醇四脂肪酸酯的量,更提出一种苯乙烯-丙烯腈共聚树脂组成物,包含:100重量份的苯乙烯-丙烯腈共聚物以及0.05~0.5重量份的季戊四醇的酯类混合物。其中,该苯乙烯-丙烯腈共聚物含丙烯腈单体单元30~35重量%,较佳为32~34重量%。另外,季戊四醇的酯类混合物包含季戊四醇单脂肪酸酯、季戊四醇二脂肪酸酯、季戊四醇三脂肪酸酯以及季戊四醇四脂肪酸酯,并且每100克苯乙烯-丙烯腈共聚树脂组成物中,季戊四醇四脂肪酸酯小于1.28×10-4摩尔。In addition, the present invention further proposes a styrene-acrylonitrile copolymer resin composition according to the amount of pentaerythritol tetra-fatty acid ester, comprising: 100 parts by weight of styrene-acrylonitrile copolymer and 0.05-0.5 parts by weight of pentaerythritol Esters mixture. Wherein, the styrene-acrylonitrile copolymer contains 30-35% by weight of acrylonitrile monomer units, preferably 32-34% by weight. In addition, the ester mixture of pentaerythritol contains pentaerythritol mono-fatty acid ester, pentaerythritol di-fatty acid ester, pentaerythritol tri-fatty acid ester and pentaerythritol tetra-fatty acid ester, and in every 100 grams of styrene-acrylonitrile copolymer resin composition, pentaerythritol tetra-fatty acid ester The acid ester is less than 1.28×10 -4 mol.

此外,本发明进一步根据季戊四醇的酯类混合物的氢氧根的量以及季戊四醇四脂肪酸酯的量的关系,提出一种苯乙烯-丙烯腈共聚树脂组成物,其包含:100重量份的苯乙烯-丙烯腈共聚物以及0.05~0.5重量份的季戊四醇的酯类混合物。其中,该苯乙烯-丙烯腈单体的共聚物含丙烯腈单体单元30~35重量%。另外,季戊四醇的酯类混合物包含季戊四醇单脂肪酸酯、季戊四醇二脂肪酸酯、季戊四醇三脂肪酸酯以及季戊四醇四脂肪酸酯,另外,每100克苯乙烯-丙烯腈共聚树脂组成物中,季戊四醇的酯类混合物的氢氧根的量大于1.07×10-4摩尔以及季戊四醇四脂肪酸酯的量小于1.02×10-4摩尔。In addition, the present invention further proposes a styrene-acrylonitrile copolymer resin composition according to the relationship between the amount of hydroxide groups of the ester mixture of pentaerythritol and the amount of pentaerythritol tetra-fatty acid ester, which comprises: 100 parts by weight of styrene - Acrylonitrile copolymer and 0.05-0.5 parts by weight of ester mixture of pentaerythritol. Wherein, the copolymer of styrene-acrylonitrile monomers contains 30-35% by weight of acrylonitrile monomer units. In addition, the ester mixture of pentaerythritol contains pentaerythritol mono-fatty acid ester, pentaerythritol di-fatty acid ester, pentaerythritol tri-fatty acid ester and pentaerythritol tetra-fatty acid ester. In addition, in every 100 grams of styrene-acrylonitrile copolymer resin composition, the content of pentaerythritol The amount of hydroxide in the ester mixture is greater than 1.07×10 -4 mol and the amount of pentaerythritol tetra fatty acid ester is less than 1.02×10 -4 mol.

如上所述,本发明的苯乙烯-丙烯腈共聚树脂组成物,其可具下述优点:苯乙烯-丙烯腈共聚树脂组成物具有较高的透明度,并且兼具有优良的离模性。As mentioned above, the styrene-acrylonitrile copolymer resin composition of the present invention has the following advantages: the styrene-acrylonitrile copolymer resin composition has high transparency and excellent mold release properties.

为了进一步理解和认识本发明的特征和效果,下面将详细说明本发明的实施例。In order to further understand and realize the features and effects of the present invention, the following will describe the embodiments of the present invention in detail.

附图说明 Description of drawings

图1是实施例1与比较例在添加不同重量份的酯化物的情况下离模力的比较图。Fig. 1 is the comparative diagram of the mold release force in the case of adding different weight parts of esterified products in Example 1 and Comparative Example.

图2是实施例1与比较例在添加不同重量份的酯化物的情况下雾度(haze)与酯化物添加重量份的比较图。Fig. 2 is a comparative diagram of the haze and the added weight part of the esterified product in Example 1 and Comparative Example in the case of adding different weight parts of the esterified product.

图3是雾度与季戊四醇四硬脂酸酯摩尔数的关系图。Figure 3 is a graph showing the relationship between haze and the number of moles of pentaerythritol tetrastearate.

图4是雾度与氢氧根摩尔数的关系图。Figure 4 is a graph showing the relationship between haze and the number of moles of hydroxide radicals.

图5是雾度与季戊四醇四硬脂酸酯的摩尔数的另一关系图。Figure 5 is another graph of haze versus moles of pentaerythritol tetrastearate.

图6是雾度与氢氧根摩尔数的另一关系图。Figure 6 is another graph of haze versus moles of hydroxide radicals.

具体实施方式 Detailed ways

本发明的苯乙烯-丙烯腈共聚树脂组成物包含100重量份的苯乙烯-丙烯腈共聚物以及0.05~0.5重量份的季戊四醇的酯类混合物。The styrene-acrylonitrile copolymer resin composition of the present invention comprises 100 parts by weight of styrene-acrylonitrile copolymer and 0.05-0.5 parts by weight of the ester mixture of pentaerythritol.

其中,在苯乙烯-丙烯腈共聚物中,丙烯腈单体单元重量份为18、28以及33.5的共聚物可由以下制备例I、II、III得到。Wherein, among the styrene-acrylonitrile copolymers, the copolymers with 18, 28 and 33.5 parts by weight of acrylonitrile monomer units can be obtained from the following preparation examples I, II and III.

制备例I:Preparation example I:

将苯乙烯83重量%、丙烯腈17重量%的原料以及相对于苯乙烯单体及丙烯腈单体总和100重量份的乙苯10重量%进行混合以得到混合物,偶氮-双-异丁腈(AIBN)0.02重量份、叔十二硫醇(t-dodecyl mercaptan)以及后述反应所除去的挥发成分经冷凝后所形成的回收液共同作为喂给液,然后将混合物和喂给液供给到内部温度保持在145℃且容积为45公升的带有搅拌器的连续式釜型反应器,且聚合率保持在56%。A raw material of 83% by weight of styrene, 17% by weight of acrylonitrile, and 10% by weight of ethylbenzene relative to the total of 100 parts by weight of styrene monomer and acrylonitrile monomer were mixed to obtain a mixture, azo-bis-isobutyronitrile (AIBN) 0.02 parts by weight, t-dodecyl mercaptan (t-dodecyl mercaptan) and the recovery liquid formed after condensation of the volatile components removed by the reaction described later are used as the feed liquid together, and then the mixture and the feed liquid are supplied to The internal temperature was kept at 145° C. and the volume was a continuous tank type reactor with a stirrer of 45 liters, and the polymerization rate was kept at 56%.

当反应液通过脱挥发装置除去挥发成分后,再经模头压出条状物后,经冷却、切粒,可得到苯乙烯-丙烯腈共聚物的颗粒,即制备例I;另一方面,所除去的挥发成分经过冷凝器凝缩,以作为回收液,并连续地与上述原料一起作为混合液,以供再次使用,通过调节叔十二硫醇的量,可制得熔融流动指数为3.0的苯乙烯-丙烯腈共聚树脂,其丙烯腈单体单元为18重量%。After the reaction liquid passes through the devolatilization device to remove volatile components, and then extrude strips through the die, after cooling and pelletizing, the particles of styrene-acrylonitrile copolymer can be obtained, i.e. Preparation I; on the other hand, The removed volatile components are condensed by a condenser to be used as a recovery liquid, and are continuously used as a mixed liquid with the above-mentioned raw materials for reuse. By adjusting the amount of tert-dodecyl mercaptan, a melt flow index of 3.0 can be obtained. The styrene-acrylonitrile copolymer resin has an acrylonitrile monomer unit of 18% by weight.

制备例II:Preparation II:

重复制备例I的步骤,除此之外,将原料的混合比例改为苯乙烯68重量%、丙烯腈32重量%,可制得熔融流动指数为1.5的苯乙烯-丙烯腈共聚树脂,其丙烯腈单体单元28重量%。Repeat the steps of Preparation Example 1, in addition, change the mixing ratio of raw materials to 68% by weight of styrene and 32% by weight of acrylonitrile to obtain a styrene-acrylonitrile copolymer resin with a melt flow index of 1.5, and its propylene Nitrile monomer unit 28% by weight.

制备例III:Preparation Example III:

重复制备例I的步骤,除此之外,将原料的混合比例改为苯乙烯54.0重量%、丙烯腈46.0重量%,可制得熔融流动指数为0.9的苯乙烯-丙烯腈共聚树脂,其丙烯腈单体单元33.5重量%。Repeat the steps of Preparation Example 1, in addition, change the mixing ratio of raw materials to 54.0% by weight of styrene and 46.0% by weight of acrylonitrile to obtain a styrene-acrylonitrile copolymer resin with a melt flow index of 0.9, and its acrylonitrile Nitrile monomer unit 33.5% by weight.

熔融流动指数:按照ASTM D-1238法测试,测试温度200℃,荷重5公斤。单位为克/10分钟(g/10min)。Melt flow index: Tested according to ASTM D-1238 method, the test temperature is 200°C, and the load is 5 kg. The unit is grams/10 minutes (g/10min).

离型性:使用具有负荷传感器(load-cell)的盒型模具,在200℃射出成型,待成品重量稳定后记录其顶出脱模时的顶针抵抗力,并以Kgf表示,测定数字越低,表示离型性越好。Release property: Use a box mold with a load-cell, injection molding at 200°C, record the resistance of the thimble when the product is ejected and demolded after the weight of the finished product is stable, and express it in Kgf, the lower the measured number , indicating better release properties.

雾度的测量方式为:例如将苯乙烯-丙烯腈共聚树脂利用射出成型的方式制作出3毫米厚的试片,并按照ASTM D-1003标准测定透明性,当雾度越高时,说明透明度越差。The measurement method of haze is: for example, the styrene-acrylonitrile copolymer resin is made of a 3 mm thick test piece by injection molding, and the transparency is measured according to the ASTM D-1003 standard. When the haze is higher, it means transparency worse.

黄色指数(YI)测量方法:在射出成型机射出成型时,成型品为5公分、厚度1/8inch的圆盘,以Datacolor International公司制造的、型号为Spectraflash500的色差仪测试黄色指数(YI)。Yellowness index (YI) measurement method: During the injection molding of the injection molding machine, the molded product is a disc with a thickness of 5 cm and a thickness of 1/8 inch, and the yellowness index (YI) is tested with a spectroflash500 colorimeter manufactured by Datacolor International.

本发明的季戊四醇的酯类混合物的具体例为季戊四醇与硬脂酸和/或棕榈酸形成的酯类混合物A,其中,单脂肪酸酯(季戊四醇单硬脂酸酯、季戊四醇单棕榈酸酯)、二脂肪酸酯(季戊四醇二硬脂酸酯、季戊四醇二棕榈酸酯)、三脂肪酸酯(季戊四醇三硬脂酸酯、季戊四醇三棕榈酸酯)以及四脂肪酸酯(季戊四醇四硬脂酸酯、季戊四醇四棕榈酸酯)分别占季戊四醇的酯类混合物A的重量百分比大约12%、40%、42%以及6%。此外,按照上面所述的季戊四醇的酯类混合物A按照使用约45%硬酯酸以及55%棕榈酸酯化计算,则每1克该季戊四醇的酯类混合物A中,氢氧根的量约为2.66×10-3摩尔,季戊四醇四脂肪酸酯含量约为5.28×10-5摩尔。如果混合物使用100%硬酯酸与季戊四醇酯化的酯类,则每1克该季戊四醇的酯类中氢氧根的量约为2.54×10-3摩尔,季戊四醇四硬酯酸酯含量约为5×10-5摩尔。因此,每1克该季戊四醇的酯类混合物中,氢氧根的量最佳大于2.54×10-3摩尔。如果在100重量份的苯乙烯-丙烯腈共聚物(制备例I)中使用0.05~0.5重量份的季戊四醇的酯类混合物A情况下,季戊四醇的酯类混合物A的氢氧根的的量介于1.33×10-3~1.33×10-4摩尔。The specific example of the ester mixture of pentaerythritol of the present invention is the ester mixture A that pentaerythritol forms with stearic acid and/or palmitic acid, wherein, monofatty acid ester (pentaerythritol monostearate, pentaerythritol monopalmitate), Two fatty acid esters (pentaerythritol distearate, pentaerythritol dipalmitate), three fatty acid esters (pentaerythritol tristearate, pentaerythritol tripalmitate) and four fatty acid esters (pentaerythritol tetrastearate, Pentaerythritol tetrapalmitate) accounts for approximately 12%, 40%, 42% and 6% by weight of the pentaerythritol ester mixture A, respectively. In addition, according to the above-mentioned ester mixture A of pentaerythritol based on the use of about 45% stearic acid and 55% palmitic esterification, the amount of hydroxide radicals in every 1 gram of the ester mixture A of pentaerythritol is about 2.66×10 -3 mol, and the content of pentaerythritol tetra fatty acid ester is about 5.28×10 -5 mol. If the mixture uses 100% esters of stearic acid and pentaerythritol esterification, the amount of hydroxide in 1 gram of the esters of pentaerythritol is about 2.54×10-3 moles, and the content of pentaerythritol tetrastearate is about 5 ×10 -5 mol. Therefore, per 1 gram of the pentaerythritol ester mixture, the amount of hydroxide is preferably greater than 2.54×10 -3 moles. If 0.05 to 0.5 parts by weight of the pentaerythritol ester mixture A is used in 100 parts by weight of the styrene-acrylonitrile copolymer (Preparation I), the amount of the hydroxide group of the pentaerythritol ester mixture A is between 1.33×10 -3 to 1.33×10 -4 mol.

实施例1:取制备例III的树脂100重量份与混合物A按照表1所列的重量份(phr),在带有排气口的单轴压出机的设定温度190~220℃的条件下熔融混练,可制得颗粒(pellet)状的本发明的苯乙烯-丙烯腈共聚树脂组成物。Embodiment 1: Get 100 parts by weight of the resin of Preparation Example III and mixture A according to the parts by weight (phr) listed in Table 1, under the condition of a set temperature of 190 to 220°C in a uniaxial extruder with an exhaust port The styrene-acrylonitrile copolymer resin composition of the present invention in the form of pellets can be obtained by melting and kneading.

表1:实施例1结果列表如下:Table 1: The results of Example 1 are listed as follows:

Figure BSA00000502812000061
Figure BSA00000502812000061

这里列举出比较例,该比较例与本发明的苯乙烯-丙烯腈共聚树脂组成物成分相似,但是将0.05~0.5重量份的季戊四醇的酯类混合物A替换为0.05~0.5重量份的季戊四醇四硬脂酸酯,并将比较两者的离模力和雾度。即,按照上述季戊四醇四硬脂酸酯计算,每1克该季戊四醇四硬脂酸酯中,氢氧根的量几乎为0摩尔,季戊四醇四硬酯酸酯含量为8.33×10-4摩尔。A comparative example is listed here, which is similar to the composition of the styrene-acrylonitrile copolymer resin composition of the present invention, but 0.05 to 0.5 parts by weight of the ester mixture A of pentaerythritol is replaced by 0.05 to 0.5 parts by weight of pentaerythritol tetrahard ester, and will compare the release force and haze of the two. That is, calculated from the above-mentioned pentaerythritol tetrastearate, the amount of hydroxide radicals is almost 0 mol per 1 gram of the pentaerythritol tetrastearate, and the content of pentaerythritol tetrastearate is 8.33×10 −4 mol.

比较例:取制备例III、II、I的树脂100重量份与季戊四醇四硬脂酸酯以表2所列的重量份(phr),在带有排气口的单轴压出机的设定温度190~220℃的条件下熔融混练,可制得颗粒状的比较例的苯乙烯-丙烯腈共聚树脂。Comparative example: get the resin 100 weight parts of preparation example III, II, I and pentaerythritol tetrastearate with the weight parts (phr) listed in table 2, in the setting of the uniaxial extruder with exhaust port Melting and kneading at a temperature of 190-220° C. can produce the styrene-acrylonitrile copolymer resin of the comparative example in granular form.

表2:比较例结果列表如下:Table 2: The list of results of comparative examples is as follows:

Figure BSA00000502812000062
Figure BSA00000502812000062

由比较例可知,当丙烯腈单体单元在33.5重量份时,当加入季戊四醇四硬脂酸酯时,雾度会显著下降。同时当丙烯腈单体单元的含量增加时,其黄色指数会进一步上升,表示该树脂本身所带的黄色更重,而当丙烯腈单体单元在33.5重量份时,当加入季戊四醇四硬脂酸酯时,黄色指数会显著上升。因此苯乙烯-丙烯腈共聚物含丙烯腈单体单元30~35重量%,较佳为32~34重量%。It can be seen from the comparative example that when the acrylonitrile monomer unit is 33.5 parts by weight, the haze will decrease significantly when pentaerythritol tetrastearate is added. Simultaneously when the content of acrylonitrile monomer unit increases, its yellowness index can further rise, and the yellow that represents this resin itself is heavier, and when acrylonitrile monomer unit is in 33.5 weight parts, when adding pentaerythritol tetrastearic acid When esters are added, the yellowness index will increase significantly. Therefore, the styrene-acrylonitrile copolymer contains 30-35% by weight of acrylonitrile monomer units, preferably 32-34% by weight.

参照图1和图2,图1是实施例1与比较例在添加不同重量份酯化物的情况下离模力的比较图,图2是实施例1与比较例在添加不同重量份酯化物的情况下雾度与酯化物添加重量份的比较图。结果发现,本发明的苯乙烯-丙烯腈共聚树脂组成物在具有0.1、0.15、0.2、0.25、0.35及0.5重量份的季戊四醇的酯类混合物情况下,离模力分别为207.1、207.5、200.6、197.3、156.4和154.8,雾度分别为0.63%、0.56%、0.68%、0.53%、0.45%和0.94%。换言之,本发明的苯乙烯-丙烯腈共聚树脂组成物的离模力介于约150~280,雾度小于约1%,黄色指数小于12.5。而比较例中,在具有0.2及0.5重量份的季戊四醇四硬脂酸酯情况下,离模力分别为169.2和76.6,而在具有0.2重量份的季戊四醇四硬脂酸酯情况下,雾度为3.49%,黄色指数上升到约22.5。简言之,比较例的离模力为约75~280,在使用0.2重量份季戊四醇四硬脂酸酯的情况下雾度为约3.49%,换言之,在使用季戊四醇四硬脂酸酯的情况下,虽然在较高重量份的季戊四醇四硬脂酸酯的情况下,会有较低的离模力而使得脱模较为简单,但是却会造成透明度下降以及树脂偏黄。然而,使用本发明的苯乙烯-丙烯腈共聚树脂组成物,即使在添加至0.5重量份季戊四醇的酯类混合物的情况下,其雾度仍小于1%,且同时还具有良好的离模性。因此树脂的加工成形性佳且成品具有良好的透明度。With reference to Fig. 1 and Fig. 2, Fig. 1 is the comparative figure of release force under the situation of adding different weight parts esterified product in embodiment 1 and comparative example, Fig. 2 is embodiment 1 and comparative example adding different weight part esterified product The comparison chart of the haze and the added weight part of the esterified product in the case. As a result, it was found that the release force of the styrene-acrylonitrile copolymer resin composition of the present invention was 207.1, 207.5, 200.6, 207.1, 207.5, 200.6, 197.3, 156.4 and 154.8, the haze is 0.63%, 0.56%, 0.68%, 0.53%, 0.45% and 0.94%, respectively. In other words, the release force of the styrene-acrylonitrile copolymer resin composition of the present invention is about 150-280, the haze is less than about 1%, and the yellowness index is less than 12.5. And in comparative example, under the pentaerythritol tetrastearate situation with 0.2 and 0.5 weight part, release force is respectively 169.2 and 76.6, and under the pentaerythritol tetrastearate situation with 0.2 weight part, haze is 3.49%, the yellow index rose to about 22.5. In short, the release force of the comparative example was about 75 to 280, and the haze was about 3.49% in the case of using 0.2 parts by weight of pentaerythritol tetrastearate, in other words, in the case of using pentaerythritol tetrastearate , although under the situation of pentaerythritol tetrastearate of higher weight part, there will be lower release force and make demoulding simpler, but it will cause transparency to decline and resin slant yellow. However, using the styrene-acrylonitrile copolymer resin composition of the present invention, even when added to 0.5 parts by weight of the ester mixture of pentaerythritol, the haze is still less than 1%, and at the same time, it has good mold release properties. Therefore, the processing formability of the resin is good and the finished product has good transparency.

此外,在季戊四醇的酯类混合物A中进一步加入季戊四醇四硬脂酸酯而组成混合物B、C、D,其中季戊四醇的酯类混合物A与季戊四醇四硬脂酸酯的比例分别为3∶1、1∶1和1∶3,并且季戊四醇的酯类混合物A与季戊四醇四硬脂酸酯的重量份之和为0.2,即混合物B、C、D的重量份均为0.2(phr),混合物B是0.15重量份的酯类混合物A与0.05重量份的季戊四醇四硬脂酸酯混合而成;混合物C是0.10重量份的酯类混合物A与0.10重量份的季戊四醇四硬脂酸酯混合而成;混合物D是0.05重量份的酯类混合物A与0.15重量份的季戊四醇四硬脂酸酯混合而成。In addition, pentaerythritol tetrastearate is further added to pentaerythritol ester mixture A to form mixtures B, C, and D, wherein the ratios of pentaerythritol ester mixture A to pentaerythritol tetrastearate are 3:1, 1, respectively. : 1 and 1: 3, and the sum of the parts by weight of ester mixture A of pentaerythritol and pentaerythritol tetrastearate is 0.2, that is, the parts by weight of mixtures B, C, and D are all 0.2 (phr), and mixture B is 0.15 The ester mixture A of parts by weight is mixed with the pentaerythritol tetrastearate of 0.05 parts by weight; the mixture C is formed by mixing the ester mixture A of 0.10 parts by weight with the pentaerythritol tetrastearate of 0.10 parts by weight; the mixture D It is formed by mixing 0.05 parts by weight of ester mixture A and 0.15 parts by weight of pentaerythritol tetrastearate.

实施例2:取制备例III的树脂100重量份与混合物B、C、D以表3所列的重量份,在带有排气口的单轴压出机的设定温度190~220℃的条件下熔融混练,可制得颗粒状的本发明的苯乙烯-丙烯腈共聚树脂组成物。Embodiment 2: Get 100 parts by weight of the resin of Preparation Example III and the parts by weight of mixtures B, C, and D listed in Table 3, at a set temperature of 190 to 220°C in a uniaxial extruder with an exhaust port The styrene-acrylonitrile copolymer resin composition of the present invention in granular form can be obtained by melting and kneading under certain conditions.

表3:实施例2的结果列表如下:Table 3: the result list of embodiment 2 is as follows:

Figure BSA00000502812000081
Figure BSA00000502812000081

参照图3和图4,图3是雾度与季戊四醇四硬脂酸酯的摩尔数的关系图,图4是雾度与氢氧根的摩尔数的关系图。另外,在图3中,标记由左至右分别为季戊四醇的酯类混合物A与季戊四醇四硬脂酸酯的比例为3∶1、1∶1和1∶3的情况,在图4中,标记由左至右分别为季戊四醇的酯类混合物A与季戊四醇四硬脂酸酯的比例为1∶3、1∶1和3∶1的情况。在季戊四醇的酯类混合物A与季戊四醇四硬脂酸酯的比例为3∶1的情况下,经过计算得知在每100克苯乙烯-丙烯腈共聚树脂组成物中,季戊四醇四硬脂酸酯的量约为4.96×10-5摩尔,氢氧根的量约为4.00×10-4摩尔,雾度约为0.7%。另外,在季戊四醇的酯类混合物A与季戊四醇四硬脂酸酯的比例为1∶1的情况下,经过计算得知在每100克苯乙烯-丙烯腈共聚树脂组成物中,季戊四醇四硬脂酸酯的量约为8.86×10-5摩尔,氢氧根的量约为2.66×10-4摩尔,雾度约为0.76%。接着,在季戊四醇的酯类混合物A与季戊四醇四硬脂酸酯的比例为1∶3的情况下,经过计算得知在每100克苯乙烯-丙烯腈共聚树脂组成物中,季戊四醇四硬脂酸酯的量约为1.28×10-4摩尔,氢氧根的量约为1.33×10-4摩尔,雾度约为1%。简言之,在每100克苯乙烯-丙烯腈共聚树脂组成物中,当季戊四醇四硬脂酸酯约小于1.28×10-4摩尔以及季戊四醇的酯类混合物的氢氧根的量为例如约大于1.33×10-4摩尔时,经过测量之后可得到约小于1%的雾度。Referring to Figure 3 and Figure 4, Figure 3 is a graph of the relationship between haze and the number of moles of pentaerythritol tetrastearate, and Figure 4 is a graph of the relationship between haze and the number of moles of hydroxide. In addition, in Fig. 3, the ratios of pentaerythritol ester mixture A and pentaerythritol tetrastearate from left to right are 3:1, 1:1 and 1:3, and in Fig. 4, marked From left to right, the ratios of pentaerythritol ester mixture A to pentaerythritol tetrastearate are 1:3, 1:1 and 3:1. Under the situation that the ratio of the ester mixture A of pentaerythritol and pentaerythritol tetrastearate is 3: 1, it is known through calculation that in every 100 grams of styrene-acrylonitrile copolymer resin composition, the content of pentaerythritol tetrastearate The amount is about 4.96×10 -5 mol, the amount of hydroxide is about 4.00×10 -4 mol, and the haze is about 0.7%. In addition, when the ratio of the ester mixture A of pentaerythritol to pentaerythritol tetrastearate is 1:1, it is calculated that in every 100 grams of styrene-acrylonitrile copolymer resin composition, pentaerythritol tetrastearate The amount of ester is about 8.86×10 -5 mol, the amount of hydroxide is about 2.66×10 -4 mol, and the haze is about 0.76%. Then, under the situation that the ratio of the ester mixture A of pentaerythritol to pentaerythritol tetrastearate is 1:3, it is known that in every 100 grams of styrene-acrylonitrile copolymer resin composition, pentaerythritol tetrastearate The amount of ester was about 1.28×10 -4 mol, the amount of hydroxide was about 1.33×10 -4 mol, and the haze was about 1%. In short, per 100 grams of styrene-acrylonitrile copolymer resin composition, when the amount of pentaerythritol tetrastearate is about less than 1.28×10 -4 mol and the amount of hydroxide of the ester mixture of pentaerythritol is, for example, more than about At 1.33×10 -4 moles, a haze of less than 1% can be obtained after measurement.

此外,在季戊四醇的酯类混合物A中进一步加入季戊四醇四硬脂酸酯而组成混合物B、C、D,其中季戊四醇的酯类混合物A与季戊四醇四硬脂酸酯的比例分别为3∶1、1∶1和1∶3,并且季戊四醇的酯类混合物A与季戊四醇四硬脂酸酯的重量份之和为0.16,即混合物B、C、D的重量份为0.16。混合物B是0.12重量份的酯类混合物A与0.04重量份的季戊四醇四硬脂酸酯混合而成;混合物C是0.08重量份的酯类混合物A与0.08重量份的季戊四醇四硬脂酸酯混合而成;混合物D是0.04重量份的酯类混合物A与0.12重量份的季戊四醇四硬脂酸酯混合而成。In addition, pentaerythritol tetrastearate is further added to pentaerythritol ester mixture A to form mixtures B, C, and D, wherein the ratios of pentaerythritol ester mixture A to pentaerythritol tetrastearate are 3:1, 1, respectively. : 1 and 1: 3, and the sum of the parts by weight of the ester mixture A of pentaerythritol and pentaerythritol tetrastearate is 0.16, that is, the parts by weight of mixtures B, C, and D are 0.16. Mixture B is that the ester mixture A of 0.12 weight part is mixed with the pentaerythritol tetrastearate of 0.04 weight part; into; mixture D is 0.04 parts by weight of ester mixture A mixed with 0.12 parts by weight of pentaerythritol tetrastearate.

实施例3:取制备例III的树脂100重量份与混合物B、C、D以表四所列的重量份,在带有排气口的单轴压出机的设定温度190~220℃的条件下熔融混练,可制得颗粒状的本发明的苯乙烯-丙烯腈共聚树脂组成物。Embodiment 3: Get 100 parts by weight of the resin of Preparation Example III and the parts by weight of the mixtures B, C, and D listed in Table 4, at a temperature of 190 to 220° C. of a uniaxial extruder with an exhaust port The styrene-acrylonitrile copolymer resin composition of the present invention in granular form can be obtained by melting and kneading under certain conditions.

表四:实施例3的结果列表如下:Table four: the result list of embodiment 3 is as follows:

Figure BSA00000502812000091
Figure BSA00000502812000091

参照图5和图6,图5是雾度与季戊四醇四硬脂酸酯的摩尔数的另一关系图,图6是雾度与氢氧根的摩尔数的另一关系图。另外,在图5中,标记由左至右分别为季戊四醇的酯类混合物A与季戊四醇四硬脂酸酯的比例为3∶1、1∶1和1∶3的情况,在图6中,标记由左至右分别为季戊四醇的酯类混合物A与季戊四醇四硬脂酸酯的比例为1∶3、1∶1和3∶1的情况。在季戊四醇的酯类混合物A与季戊四醇四硬脂酸酯的比例为3∶1的情况下,经过计算得知在每100克苯乙烯-丙烯腈共聚树脂组成物中,季戊四醇四硬脂酸酯的量约为3.97×10-5摩尔,氢氧根的量约为3.20×10-4摩尔,雾度约为0.72%。另外,在季戊四醇的酯类混合物A与季戊四醇四硬脂酸酯的比例为1∶1的情况下,经过计算得知在每100克苯乙烯-丙烯腈共聚树脂组成物中,季戊四醇四硬脂酸酯的量约为7.09×10-5摩尔,氢氧根的量约为2.13×10-4摩尔,雾度约为0.82%。接着,在季戊四醇的酯类混合物A与季戊四醇四硬脂酸酯的比例为1∶3的情况下,经过计算得知在每100克苯乙烯-丙烯腈共聚树脂组成物中,季戊四醇四硬脂酸酯的量约为1.02×10-4摩尔,而氢氧根的量约为1.07×10-4摩尔,雾度约为0.81%。简言之,在每100克苯乙烯-丙烯腈共聚树脂组成物中,当季戊四醇四硬脂酸酯约小于1.02×10-4摩尔以及季戊四醇的酯类混合物的氢氧根量例如约大于1.07×10-4摩尔时,经过测量之后可得到约小于1%的雾度。Referring to Figure 5 and Figure 6, Figure 5 is another graph of the relationship between haze and the number of moles of pentaerythritol tetrastearate, and Figure 6 is another graph of the relationship between haze and the number of moles of hydroxide. In addition, in Fig. 5, the ratios of pentaerythritol ester mixture A and pentaerythritol tetrastearate from left to right are 3: 1, 1: 1 and 1: 3, and in Fig. 6, marked From left to right, the ratios of pentaerythritol ester mixture A to pentaerythritol tetrastearate are 1:3, 1:1 and 3:1. Under the situation that the ratio of the ester mixture A of pentaerythritol and pentaerythritol tetrastearate is 3: 1, it is known through calculation that in every 100 grams of styrene-acrylonitrile copolymer resin composition, the content of pentaerythritol tetrastearate The amount is about 3.97×10 -5 mol, the amount of hydroxide is about 3.20×10 -4 mol, and the haze is about 0.72%. In addition, when the ratio of the ester mixture A of pentaerythritol to pentaerythritol tetrastearate is 1:1, it is calculated that in every 100 grams of styrene-acrylonitrile copolymer resin composition, pentaerythritol tetrastearate The amount of ester is about 7.09×10 -5 mol, the amount of hydroxide is about 2.13×10 -4 mol, and the haze is about 0.82%. Then, under the situation that the ratio of the ester mixture A of pentaerythritol to pentaerythritol tetrastearate is 1:3, it is known that in every 100 grams of styrene-acrylonitrile copolymer resin composition, pentaerythritol tetrastearate The amount of ester is about 1.02×10 -4 mol, the amount of hydroxide is about 1.07×10 -4 mol, and the haze is about 0.81%. In short, in every 100 grams of styrene-acrylonitrile copolymer resin composition, when pentaerythritol tetrastearate is about less than 1.02× 10-4 mol and the amount of hydroxide radicals of the ester mixture of pentaerythritol is greater than about 1.07× 10 -4 mol, the haze of less than 1% can be obtained after measurement.

本发明的苯乙烯-丙烯腈共聚树脂组成物的一个特点在于,通过加入特定的季戊四醇的酯类混合物,使得本发明的树脂组成物成形品的雾度的表现比较好。简言之,本发明的苯乙烯-丙烯腈共聚树脂组成物兼顾了离模力以及雾度的考虑,使得树脂成形品在脱模性以及透明度的性质上都可以兼顾。One feature of the styrene-acrylonitrile copolymer resin composition of the present invention is that the haze of the molded article of the resin composition of the present invention is relatively good by adding a specific mixture of pentaerythritol esters. In short, the styrene-acrylonitrile copolymer resin composition of the present invention takes into account both mold release force and haze, so that molded resin products can have both mold release properties and transparency properties.

本发明的苯乙烯-丙烯腈共聚树脂组成物可根据需要,在不影响本发明的效果的范围内添加各种添加剂。添加剂为例如抗氧化剂、耐热剂、耐光剂、耐候剂,抗静电剂、兼容化剂、颜料、染料以及荧光增白剂等等。To the styrene-acrylonitrile copolymer resin composition of the present invention, various additives may be added as needed within a range that does not affect the effect of the present invention. Additives are, for example, antioxidants, heat-resistant agents, light-resistant agents, weather-resistant agents, antistatic agents, compatibilizers, pigments, dyes, fluorescent whitening agents and the like.

以上所述仅是举例性的,而非限制性的。在未脱离本发明的精神和范围的情况下,对其进行的任何等效修改或变更,均应包含在本发明的权利要求书的范围内。The above description is only illustrative, not restrictive. Without departing from the spirit and scope of the present invention, any equivalent modification or change should be included in the scope of the claims of the present invention.

Claims (10)

1. a styrene-acrylonitrile resin constituent, is characterized in that, comprises:
One styrene-acrylonitrile copolymer of 100 weight parts, the ester mixture of a tetramethylolmethane of 0.05~0.5 weight part, wherein,
This styrene-acrylonitrile copolymer contains acrylonitrile monemer unit 30~35 % by weight;
The ester mixture of this tetramethylolmethane comprises tetramethylolmethane mono fatty acid ester, tetramethylolmethane di fatty acid ester, tetramethylolmethane tri-fatty acid ester and tetramethylolmethane four fatty acid esters, and the mist degree of this styrene-acrylonitrile resin constituent is less than 1%.
2. styrene-acrylonitrile resin constituent according to claim 1, is characterized in that, this styrene-acrylonitrile copolymer contains acrylonitrile monemer unit 32~34 % by weight.
3. styrene-acrylonitrile resin constituent according to claim 1, is characterized in that, based on the ester mixture of this tetramethylolmethane, the weight percent of this tetramethylolmethane di fatty acid ester and this tetramethylolmethane tri-fatty acid ester is greater than 82%.
4. styrene-acrylonitrile resin constituent according to claim 1, is characterized in that, based on the ester mixture of this tetramethylolmethane, the weight percent of these tetramethylolmethane four fatty acid esters is less than 6%.
5. a styrene-acrylonitrile resin constituent, is characterized in that, comprises:
One styrene-acrylonitrile copolymer of 100 weight parts, the ester mixture of a tetramethylolmethane of 0.05~0.5 weight part, wherein,
This styrene-acrylonitrile copolymer contains acrylonitrile monemer unit 30~35 % by weight;
The ester mixture of this tetramethylolmethane comprises tetramethylolmethane mono fatty acid ester, tetramethylolmethane di fatty acid ester, tetramethylolmethane tri-fatty acid ester and tetramethylolmethane four fatty acid esters, and in the ester mixture of every 1 this tetramethylolmethane of gram, the amount of hydroxy is greater than 2.54 * 10 -3Mole.
6. styrene-acrylonitrile resin constituent according to claim 5, is characterized in that, this styrene-acrylonitrile copolymer contains acrylonitrile monemer unit 32~34 % by weight.
7. a styrene-acrylonitrile resin constituent, is characterized in that, comprises:
One styrene-acrylonitrile copolymer of 100 weight parts, the ester mixture of a tetramethylolmethane of 0.05~0.5 weight part, wherein,
This styrene-acrylonitrile copolymer contains acrylonitrile monemer unit 30~35 % by weight;
The ester mixture of this tetramethylolmethane comprises tetramethylolmethane mono fatty acid ester, tetramethylolmethane di fatty acid ester, tetramethylolmethane tri-fatty acid ester and tetramethylolmethane four fatty acid esters, and in this styrene-acrylonitrile resin constituent of every 100 grams, the amount of these tetramethylolmethane four fatty acid esters is less than 1.28 * 10 -4Mole.
8. styrene-acrylonitrile resin constituent according to claim 7, is characterized in that, this styrene-acrylonitrile copolymer contains acrylonitrile monemer unit 32~34 % by weight.
9. styrene-acrylonitrile resin constituent according to claim 7, is characterized in that, in this styrene-acrylonitrile resin constituent of every 100 grams, the amount hydroxy of the ester mixture of this tetramethylolmethane is greater than 1.33 * 10 -4Mole.
10. a styrene-acrylonitrile resin constituent, is characterized in that, comprises:
One styrene-acrylonitrile copolymer of 100 weight parts, the ester mixture of a tetramethylolmethane of 0.05~0.5 weight part, wherein,
This styrene-acrylonitrile copolymer contains acrylonitrile monemer unit 30~35 % by weight;
The ester mixture of this tetramethylolmethane comprises tetramethylolmethane mono fatty acid ester, tetramethylolmethane di fatty acid ester, tetramethylolmethane tri-fatty acid ester and tetramethylolmethane four fatty acid esters, wherein, in this styrene-acrylonitrile resin constituent of every 100 grams, the amount hydroxy of the ester mixture of this tetramethylolmethane is greater than 1.07 * 10 -4Mole and the amount of these tetramethylolmethane four fatty acid esters less than 1.02 * 10 -4Mole.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1382186A (en) * 1999-06-11 2002-11-27 拜尔公司 Thermoplastic molding compounds
CN101851378A (en) * 2010-03-05 2010-10-06 上海锦湖日丽塑料有限公司 Extrusion grade ASA resin with easy processing and high apparent property and preparation method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1382186A (en) * 1999-06-11 2002-11-27 拜尔公司 Thermoplastic molding compounds
CN101851378A (en) * 2010-03-05 2010-10-06 上海锦湖日丽塑料有限公司 Extrusion grade ASA resin with easy processing and high apparent property and preparation method thereof

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