共查询到18条相似文献,搜索用时 93 毫秒
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不饱和聚酯改性丙烯酸树脂及其涂料 总被引:1,自引:0,他引:1
合成了低分子量不饱和聚酯树脂,再同甲基丙烯酸甲酯、苯乙烯等单体进行游离基聚合,制得含羟基的不饱和聚酯改性丙烯酸树脂。由该改性树脂同异氰酸酯制得的涂层,其干性、丰满度、光泽、硬度等综合性能优于一般羟基丙烯酸树脂。讨论了各种合成因素对树脂及涂膜性能的影响。 相似文献
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通过正交实验研究了自干型水分散氟硅改性丙烯酸树脂的影响因素,系统地分析了各个因素对于树脂成膜后的不同性能的影响,重点分析了氟元素含量(元素的质量分数)、硅元素含量(以下简称含量)、亲水基团含量的交互影响,讨论了氟、硅含量对树脂成膜性能的影响,找出了较佳的反应条件m(甲基丙烯酸甲酯)∶m(丙烯酸丁酯)∶m(苯乙烯)∶m(丙烯酸-β-羟丙酯)∶m(叔碳酸乙烯酯)=50∶10∶8∶4∶2,丙烯酸六氟丁酯(6F)作为氟改性单体。研究结果表明:亲水基团在10%、氟含量在10%、硅含量在1%时能明显改进树脂的硬度和耐水性;可以通过调整各单体的比例来满足实际应用对树脂不同性能的要求。 相似文献
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以甲基丙烯酸甲酯(MMA)、苯乙烯(St)和丙烯酸丁酯(BA)等为主要单体,引入丙烯酸(AA)、丙烯酸羟基乙酯(HEA)与甲基丙烯酸异冰片酯(IBOMA)等作为功能单体,通过半连续溶液聚合工艺,最后加水分散制得水性羟基丙烯酸树脂。利用FT-IR、透光度、粘度分析研究了单体配比、引发剂(BPO)用量、温度、链转移剂(DDM)用量、功能单体用量等因素对树脂性能的影响。结果表明,当AA、HEA、IBOMA、BPO和DDM的质量分数分别为3%、12%、10%、3%和2%,聚合反应温度100℃时可获得粘度为5 Pa.s,固含量约45%的水性羟基丙烯酸树脂。 相似文献
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以丙烯酸、苯乙烯、甲基丙烯酸甲酯等为主要单体,用溶液聚合的方法合成丙烯酸酯树脂并进行环氧树脂改性,得到的改性水性丙烯酸酯树脂与氨基树脂交联固化得到丙烯酸酯树脂涂料。探究了各种因素对产品性能的影响,并解决了水稀释型树脂用水稀释时出现黏度峰值的问题。结果表明:溶剂比为1∶(0.9~1.4),甲基丙烯酸异冰片酯单体用量10%左右,分子量调节剂——巯基乙醇用量2%~2.5%,可以避免水可稀释黏度峰的出现。用含量为20%~30%的E-20改性后的水性丙烯酸酯树脂与氨基树脂配比为1∶0.6,在180℃下高温烘烤15 min,可得到性能较佳的玻璃用涂料产品。 相似文献
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以丙烯酸、苯乙烯、甲基丙烯酸甲酯等为主要单体,用溶液聚合的方法合成丙烯酸酯树脂并进行环氧树脂改性,得到的改性水性丙烯酸酯树脂与氨基树脂交联固化得到丙烯酸酯树脂涂料。探究了各种因素对产品性能的影响,并解决了水稀释型树脂用水稀释时出现黏度峰值的问题。结果表明:溶剂比为1∶(0.9~1.4),甲基丙烯酸异冰片酯单体用量10%左右,分子量调节剂——巯基乙醇用量2%~2.5%,可以避免水可稀释黏度峰的出现。用含量为20%~30%的E-20改性后的水性丙烯酸酯树脂与氨基树脂配比为1∶0.6,在180℃下高温烘烤15 min,可得到性能较佳的玻璃用涂料产品。 相似文献
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B. D. Gesner 《应用聚合物科学杂志》1967,11(12):2499-2506
By using variations of elution and precipitation techniques, a clear ABS resin is found to be a mixture of a styrene–butadiene rubbery copolymer, a methyl methacrylate–styrene–acrylonitrile copolymer, and a graft of the methyl methacrylate–styrene–acrylonitrile copolymer onto the styrene–butadiene rubber. A clear impact acrylic is separated into a methyl methacrylate–styrene–acrylonitrile copolymer and a methyl methacrylate–butadiene rubbery copolymer. Photomicrographs indicate that clarity in the clear ABS and impact acrylic is achieved by matching refractive indices of the continuous and dispersed polymer phases. 相似文献
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Xia CaoL.James Lee 《Polymer》2003,44(5):1507-1516
The effect of a comonomer, methyl methacrylate (MMA), on volume shrinkage and residual styrene content of an unsaturated polyester (UP) resin with low profile additives (LPAs) cured at low temperature was investigated by an integrated reaction kinetics-morphology-property analysis. MMA affects the volume shrinkage and residual styrene content differently depending on MMA to styrene (St) CC bond molar ratio. At low MMA/St ratio, residual styrene decreases and the volume shrinkage of the resin system remains unchanged. At high MMA/St ratio, residual styrene can be substantially reduced, but the resin system suffers poor volume shrinkage control. Reactivity of the comonomer MMA and its compatibility to other components in the resin system can explain the observed results. A series of Seemann composites resin infusion molding process (SCRIMP) were conducted to study the relationship among materials, processing, and properties of molded composites in low temperature curing processes. 相似文献
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EPDM-graft-methyl methacrylate and styrene (EPDM-g-MS), a toughen agent for MS resin, was synthesized
by solution graft copolymerization of methyl methacrylate (MMA) and styrene (St) onto ethylene-proplene-diene
terpolymer (EPDM) in toluene/n-heptane cosolvent using benzoyl peroxide
(BPO) as an initiator. The effects of reaction conditions on the graft copolymerization were discussed.
EPDM-g-MS/MS resin blends, a novel high impact engineering plastic, was prepared by melt blending EPDM-g-MS
and MS resin. The toughening effect of EPDM-g-MS on MS resin was investigated. The results showed that
the optimized reaction conditions were EPDM/MMA-St ratio of 50/50, MMA/St ratio of 75/25, initiator dosage
of 1%, reactant concentration of 20%, toluene/n-heptane ratio of 75/25,
at 80 °C for 20h, and EPDM-g-MS with the higher EPDM content (56.8%) and grafting ratio (52.8%)
was obtained under the optimized reaction conditions. SEM analysis showed that EPDM-g-MS had good compatibility
with MS resin. EPDM-g-MS had excellent toughening effect on MS resin and could be used for toughen agent
of MS resin. 相似文献
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将甲基丙烯酰氯和氢化松香醇按酰氯与羟基物质的量之比1∶1进行酯化反应合成了甲基丙烯酸氢化松香醇酯,并采用FT-IR、GC-MS、 13C NMR 和DSC对其进行分析和表征。结果表明,甲基丙烯酸氢化松香醇酯主要由甲基丙烯酸四氢松香酯、甲基丙烯酸二氢松香酯、甲基丙烯酸去氢松香酯和少量氢化松香甲酯组成,前3个组分质量分数总和为 78.76 %,所制备的甲基丙烯酸氢化松香醇酯在引发剂的存在下可以发生聚合反应,其聚合活性比丙烯酸氢化松香醇酯高,均聚物玻璃化转变温度为-11.32 ℃,可作为反应型增黏树脂在压敏胶黏剂中使用。 相似文献