CN106366223B - Cpvc抗冲改性剂的制备方法 - Google Patents
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- YQHLDYVWEZKEOX-UHFFFAOYSA-N cumene hydroperoxide Chemical compound OOC(C)(C)C1=CC=CC=C1 YQHLDYVWEZKEOX-UHFFFAOYSA-N 0.000 claims description 2
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- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical group N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 4
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- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 2
- 150000001721 carbon Chemical group 0.000 description 2
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- 125000005250 alkyl acrylate group Chemical group 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
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- 239000003381 stabilizer Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F120/00—Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F120/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F120/10—Esters
- C08F120/12—Esters of monohydric alcohols or phenols
- C08F120/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F120/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
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- C08F255/00—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
- C08F255/02—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 on to polymers of olefins having two or three carbon atoms
- C08F255/023—On to modified polymers, e.g. chlorinated polymers
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- C08L27/22—Compositions of homopolymers or 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; Compositions of derivatives of such polymers modified by chemical after-treatment
- C08L27/24—Compositions of homopolymers or 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; Compositions of derivatives of such polymers modified by chemical after-treatment halogenated
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Abstract
本发明公开了一种CPVC抗冲改性剂的制备方法，将氯化聚乙烯包覆丙烯酸酯类化合物和分子量调节剂，升温，丙烯酸酯类化合物在氯化聚乙烯内发生聚合反应；再加入甲基炳烯酸甲脂，在氯化聚乙烯表面与聚合物发生共聚反应；氯化聚乙烯、丙烯酸酯类化合物和甲基炳烯酸甲脂的重量百分比为30～50%:65～45%:5～10%；分子量调节剂为丙烯酸酯类化合物总重量的0－0.8％。本发明具有以下优点：制得的CPVC抗冲改性剂流动性良好，既能改变CPVC在加工过程中的流动性，抗冲击强度也得到大大加强。而且还有MBS没有的耐候性。
Description
技术领域
本发明涉及聚合物制备技术领域，尤其是一种CPVC抗冲改性剂的制备方法。
背景技术
CPVC在加工过程中，流动性差，抗冲击性能差。目前用的抗冲改性剂是非透明制品用的MBS，仅作为抗冲改性剂，但存在流动性差、耐候性差等缺点。
发明内容
本发明针对现有技术的不足，提出一种CPVC抗冲改性剂的制备方法，既能改变CPVC在加工过程中的流动性，抗冲击强度也得到大大加强，而且还有MBS没有的耐候性。
为了实现上述发明目的，本发明提供以下技术方案：一种CPVC抗冲改性剂的制备方法，将氯化聚乙烯包覆丙烯酸酯类化合物和分子量调节剂，升温，丙烯酸酯类化合物在氯化聚乙烯内发生聚合反应；再加入甲基炳烯酸甲脂，在氯化聚乙烯表面与聚合物发生共聚反应；氯化聚乙烯、丙烯酸酯类化合物和甲基炳烯酸甲脂的重量百分比为30～50%:65～45%:5～10%；分子量调节剂为丙烯酸酯类化合物总重量的0－0.8％。
进一步地，丙烯酸酯类化合物的烷基碳原子数为4～8，或其组合物。
进一步地，氯化聚乙烯中氯含量为27-37%，优选为30-35%，更优选为30-33%。
进一步地，具体操作过程为：将水和分散剂搅拌混匀，加入氯化聚乙烯，搅拌均匀，加入丙烯酸酯类化合物和油溶性引发剂，升温至65-70℃，进行聚合反应；聚合完成后加入甲基炳烯酸甲脂和油溶性引发剂，65-70℃发生共聚反应，共聚完成后升温至90℃，保温1小时以上，降温至55℃以下，出料。
进一步地，水加入量为原料总量的2-3倍。
进一步地，分散剂为明胶、聚乙烯醇、羟甲基纤维素、活性磷酸钙中的一种或多种。
进一步地，引发剂为偶氮二异丁腈、偶氮二异庚腈、过氧化苯甲酰、异丙苯过氧化氢、二异丙苯过氧化氢与氧化还原体系的组合物。
进一步地，丙烯酸酯类化合物为丙烯酸丁酯或丙烯酸-2-乙基己酯。
进一步地，分子量调节剂为C4－C20的烷基硫醇。
与现有技术相比，本发明具有以下优点：制得的CPVC抗冲改性剂流动性良好，既能改变CPVC在加工过程中的流动性，抗冲击强度也得到大大加强。而且还有MBS没有的耐候性。
具体实施方式
下面结合实施例对本发明进行详细描述，本部分的描述仅是示范性和解释性，不应对本发明的保护范围有任何的限制作用。
一种CPVC抗冲改性剂的制备方法，采用将丙烯酸酯类单体在氯化聚乙烯（CPE）基体内进行聚合，丙烯酸基酯类化合物并不在CPE上接枝共聚；丙烯酸酯类单体在CPE内部聚合完成后，再加入甲基炳烯酸甲脂在CPE表面与丙烯酸酯类聚合物共聚，这样，硬单体就把软单体包裹在里面而不出现发粘现象。CPE基体占原料重量百分比的30～50%，丙烯酸单体占原料重量百分比的，甲基炳烯酸甲脂占原料重量百分比的5～10%。其中，在CPE内部的还可有分子量调节剂，分子量调节剂为C4－C20的烷基硫醇，其总用量为聚合单体总重量的0－0.8％。
作为这种合成材料的CPE，其中的氯含量范围在27-37%之间，优选30-35%，更优选30-33%。
这种流动性良好的CPVC抗冲改性剂的具体制作方法是：第一步是将水和分散剂加入到反应釜中，搅拌均匀，然后加入CPE,搅拌均匀后在加入一次反应单体和油溶性引发剂，然后升温到65-70℃聚合，聚合完毕后加入二次单体和油溶性引发剂，在65-70℃二次聚合，聚合完成后，升温到90℃以上保温1小时后降温到55℃以下出料。
上述具体过程中，水的加入量为原料总加入量的2-3倍；分散剂为明胶，聚乙烯醇以及羟甲基纤维素，活性磷酸钙等或这些的复配物；引发剂为偶氮二异丁腈、偶氮二异庚腈，过氧化苯甲酰或异丙苯过氧化氢或二异丙苯过氧化氢与氧化还原体系的组合物。
丙烯酸酯类单体是指碳原子数为4～8的丙烯酸酯的烷基酯，例如丙烯酸丁酯、丙烯酸-2-乙基己酯等，或者是它们的混合物。
单体的丙烯酸酯类的聚合物的玻璃化温度越低，制品的低温常温抗冲击强度也越好，其丙烯酸酯类单体的碳原子数也尽可能地多，分子量尽可能地分布均匀，所以内层结构采用为原子数尽可能地多的丙烯酸烷基酯和分子量调节剂是必须的。
一种加工流动性良好的CPVC抗冲改性剂的制备方法，包括如下步骤：
1、向1立方米的反应釜内加入配方量的工艺去离子水、配方量的明胶，配方量的CPE、搅拌均匀后加入含有配方量偶氮二异丁腈的丙烯酸异辛酯，通入氮气，然后开始升温到60-70度反应，4小时后测转化率达到95%以上。
2、开冷却水降低反应釜内温度到65度。然后加入配方量的含有偶氮二异丁腈的甲基丙烯酸甲酯。继续反应3小时，测转化率到98%以上时，升温到80度以上，并保温30分钟。
3．保温完毕后，降温到50度以下出料。
4．料经过连续离心机离心后进行烘干，然后到沸腾床干燥，即可得到白色粉末状聚合物。
5、筛分后包装。
6.质量检验，合格后，包装、入库。
表1实施例1－7原料重量份 及产品性能指标
产品性能：
将上述实施例1-7和对比例1-2所得的成品按照下列2种配方分别在高速混料机中混至110℃出料冷却，后在挤出机温度170℃的条件下做挤出成型试验，分别对CPVC管材的抗冲击性能和流动性进行对比和检测，检测结果如表2
1.CPVC管材配方
CPVC 100
有机锡稳定剂： 2
碳酸钙： 2
钛白粉: 4
OPE: 1.0
AC-316： 0.4
60 0.6
74 1.0
DL-20 2
本助剂： 6
表2试验测试结果
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。
Claims (5)
1.一种CPVC抗冲改性剂的制备方法，其特征在于：将氯化聚乙烯包覆丙烯酸酯类化合物和分子量调节剂，升温，丙烯酸酯类化合物在氯化聚乙烯内发生聚合反应；再加入甲基丙烯酸甲酯，在氯化聚乙烯表面与聚合物发生共聚反应；氯化聚乙烯、丙烯酸酯类化合物和甲基丙烯酸甲酯的重量百分比为30～50%：65～45%：5～10%；分子量调节剂为丙烯酸酯类化合物总重量的0-0.8%，且不为0；
氯化聚乙烯中氯含量为30-33%；
丙烯酸酯类化合物的烷基碳原子数为4～8；
分散剂为明胶、聚乙烯醇、羟甲基纤维素、活性磷酸钙中的一种或多种；
具体操作过程为：将水和分散剂搅拌混匀，加入氯化聚乙烯，搅拌均匀，加入丙烯酸酯类化合物和油溶性引发剂，升温至65-70℃，进行聚合反应；聚合完成后加入甲基丙烯酸甲酯和油溶性引发剂，65-70℃发生共聚反应，共聚完成后升温至90℃，保温1小时以上，降温至55℃以下，出料。
2.如权利要求1所述CPVC抗冲改性剂的制备方法，其特征在于：水加入量为原料总量的2-3倍。
3.如权利要求1所述CPVC抗冲改性剂的制备方法，其特征在于：引发剂选自偶氮二异丁腈、偶氮二异庚腈、过氧化苯甲酰、异丙苯过氧化氢、二异丙苯过氧化氢、氧化还原体系的组合物。
4.如权利要求1所述CPVC抗冲改性剂的制备方法，其特征在于：丙烯酸酯类化合物为丙烯酸丁酯或丙烯酸-2-乙基己酯。
5.如权利要求1所述CPVC抗冲改性剂的制备方法，其特征在于：分子量调节剂为C4-C20的烷基硫醇。
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