CN108707412B - 一种弱溶剂高光亮树脂及其制备方法 - Google Patents

一种弱溶剂高光亮树脂及其制备方法 Download PDF

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CN108707412B
CN108707412B CN201810557916.5A CN201810557916A CN108707412B CN 108707412 B CN108707412 B CN 108707412B CN 201810557916 A CN201810557916 A CN 201810557916A CN 108707412 B CN108707412 B CN 108707412B
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贝文理
钱伟伟
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Abstract

本发明涉及高分子树脂技术领域,特别涉及一种光亮树脂及其制备方法。本发明所设计的一种弱溶剂高光亮树脂,由A、B、C三种组分组成:组分A为聚氨酯树脂,按重量份计由10‑40份4,4‑二苯基甲烷二异氰酸酯、0.1‑0.2份抗氧化剂、200‑400份苯环类聚酯多元醇、60‑220份醋酸乙酯反应制得;组分B为三聚氰胺树脂;组分C为磷酸、柠檬酸、对甲苯磺酸中的一种或者几种的混合物。本发明的制备工艺简单,VOC排放量低,混合物储存稳定,可长时间保存,特别是高温天气。本发明的高光亮树脂具有储存时间长,低VOC释放、成膜亮度佳、干爽、耐溶剂性佳等特点。

Description

一种弱溶剂高光亮树脂及其制备方法
技术领域
本发明涉及高分子树脂技术领域,特别涉及一种光亮树脂及其制备方法。
背景技术
目前应用于箱包、鞋革等表面的油性光亮涂层材料,主要有油性-液型高光树脂处理剂和油性湿气固化树脂处理剂。油性-液型高光树脂处理剂具有操作方便、生产速率快等优点,其缺点也很明显,因含有大量强极性溶剂(如DMF), VOC排放量大,涂层后成品的耐溶剂性不是非常优异。油性湿气固化树脂处理剂具有成品亮度佳,水晶感强,其缺点也是VOC排量大,溶剂回收困难,对环境影响大,且操作工艺要求严格,料储存稳定性差,必须现配现用,操作复杂。
发明内容
本发明的目的在于克服现有技术的不足,提供一种保存时间长,成品性能稳定,低VOC排放量,并且成膜亮度佳、耐溶剂性强的弱溶剂高光亮树脂。
为了达到上述目的,本发明所设计的一种弱溶剂高光亮树脂,由A、B、C 三种组分组成:
组分A为聚氨酯树脂,按重量份计由10-40份4,4-二苯基甲烷二异氰酸酯、 0.1-0.2份抗氧化剂、200-400份苯环类聚酯多元醇、60-220份醋酸乙酯反应制得;
所述苯环类聚酯多元醇由间苯二甲酸、对 苯二甲酸、苯酐中的一种或者几种与乙二醇、1,4-丁二醇、一缩二乙二醇、新戊二醇、二甘醇中的一种或者几种反应而成;
组分B为三聚氰胺树脂;
组分C为磷酸、柠檬酸、对甲苯磺酸中的一种或者几种的混合物;
A、B、C三种组分的重量比为100:(10-20):(2-4)。
作为优选,所述苯环类聚酯多元醇的分子量为2000-3500。
作为优选,所述聚氨酯树脂的粘度为500-2000CPS/25℃
作为优选,所述聚氨酯树脂的固含量为70%-80%。
作为优选,所述三聚氰胺树脂为甲醚化三聚氰胺树脂或者丁醚化三聚氰胺树脂。
本发明的另一目的是提供一种上述弱溶剂高光亮树脂的制备方法,包括如下步骤:
(1)组分A的制备:将计量的苯环类聚酯多元醇、抗氧化剂、醋酸乙酯投入反应釜中在55-65℃下搅拌均匀,然后投入计量的4,4-二苯基甲烷二异氰酸酯在75-85℃下反应2小时,反应结束出料;
(2)将A、B、C组分按照比例在20-40℃下混合均匀,静置脱泡,得产物。
本发明通过合成以苯环类聚酯多元醇为主体的聚氨酯树脂形成A组分,再采用氨基树脂作为B组分,最后采用酸类形成C组分。A、B、C组分在常温下混合即可,常温混合后保存时间长而稳定,涂层使用时需要在125℃-140℃下交联形成高分子聚合物。
在组分A的合成中采用苯环类聚酯多元醇作为软段,因其合成的聚氨酯树脂成膜硬度好,不需要小分子扩链剂参与,与异氰酸酯反应即可成膜,硬度好,亮度佳,且与异氰酸酯反应形成的聚氨酯树脂在弱溶剂醋酸乙酯中具有非常好的溶解性,保证树脂稳定储存。组分B采用甲醚化或者丁醚化氨基树脂作为固化剂,交联强度高,可提供树脂优异的光亮度、耐溶剂性和对基材的附着力。组分C采用酸类物质作为促进剂,相对油性湿气固化树脂可以明显缩短烘干固化所需时间。同时,本发明的制备工艺简单,VOC排放量低,混合物储存稳定,可长时间保存,特别是高温天气。本发明的高光亮树脂具有储存时间长,低VOC 释放、成膜亮度佳、干爽、耐溶剂性佳等特点。
具体实施方式
实施例1:
一种弱溶剂高光亮树脂,通过如下方法制备得到:
1、组分A的制备:按重量份计,将200份2000分子量苯环类(间苯二甲酸和DEG共聚)多元醇,0.2份抗氧剂1010,70份醋酸乙酯投入反应釜在55℃下搅拌1小时,然后将10份MDI-100投入,70℃下保温反应2小时出料,该树脂粘度为1500CPS/25℃,固含量为75%;
2、组分B为甲醚化三聚氰胺树脂,选用氰特325;
3、组分C为对甲苯磺酸;
4、将A、B、C三种组分按重量比为100:15:4在常温下搅拌均匀,静置脱泡,得产物。
实施例2:
一种弱溶剂高光亮树脂,通过如下方法制备得到:
1、组分A的制备:按重量份计,将300份3000分子量苯环类(对苯二甲酸和DEG、NPG共聚)多元醇,0.2份抗氧剂1010,130份EAC投入反应釜在55℃下搅拌1小时,然后将8份MDI-50投入,70℃下保温反应2小时出料,该树脂粘度为1800CPS/25℃,固含量为70%;
2、组分B为甲醚化三聚氰胺树脂,选用氰特325;
3、组分C为磷酸;
4、将A、B、C三种组分按重量比为100:12:3在常温下搅拌均匀,静置脱泡,得产物。
实施例3:
一种弱溶剂高光亮树脂,通过如下方法制备得到:
1、组分A的制备:按重量份计,将250份2500分子量苯环类(苯酐和BG、 DEG共聚)多元醇,0.1份抗氧剂1010,65份EAC投入反应釜在55℃下搅拌1 小时,然后将10份MDI-100投入,70℃下保温反应2小时出料,该树脂粘度为 2000CPS/25℃,固含量为80%;
2、组分B为丁醚化三聚氰胺树脂,选用氰特1158;
3、组分C为柠檬酸;
4、将A、B、C三种组分按重量比为100:20:4在常温下搅拌均匀,静置脱泡,得产物。
试验例1
测试方法如下:将本发明高亮树脂配合液在50℃下(一般革厂夏天车间内温度最高大概45℃左右)在各个时间段测试粘度,考察储存稳定性。
Figure BDA0001681870600000041
可以发现,24h以内本发明实施例所制树脂粘度变化不明显,不影响客户辊涂/印刷操作,可行性较强,不用像油性湿气固化树脂那样现配现用,极大地提高了操作便利性;24h以后粘度上升明显,已经不适合客户使用,影响操作参数,主要由于B组份氨基树脂和A组份聚氨酯树脂发生交联反应导致体系粘度增加。
对比试验例2:
测试方法如下:将试验用树脂处理剂,在普通PU黑皮上经三版印刷机100 压刀印刷处理,烘干后观察测试对比性能。
Figure BDA0001681870600000051

Claims (2)

1.一种弱溶剂高光亮树脂,其特征在于:由A、B、C三种组分组成:
组分A为聚氨酯树脂,按重量份计由10-40份4,4-二苯基甲烷二异氰酸酯、0.1-0.2份抗氧化剂、200-400份苯环类聚酯多元醇、60-220份醋酸乙酯反应制得;所述苯环类聚酯多元醇由间苯二甲酸、对 苯二甲酸、苯酐中的一种或者几种与乙二醇、1,4-丁二醇、一缩二乙二醇、新戊二醇、二甘醇中的一种或者几种反应而成;所述苯环类聚酯多元醇的分子量为2000-3500;所述聚氨酯树脂的粘度为500-2000CPS/25℃;所述聚氨酯树脂的固含量为70%-80%;
组分B为三聚氰胺树脂;所述三聚氰胺树脂为甲醚化三聚氰胺树脂或者丁醚化三聚氰胺树脂;
组分C为磷酸、柠檬酸、对甲苯磺酸中的一种或者几种的混合物;
A、B、C三种组分的重量比为100:(10-20):(2-4)。
2.一种如权利要求1所述弱溶剂高光亮树脂的制备方法,其特征在于:包括如下步骤:
(1)组分A的制备:将计量的苯环类聚酯多元醇、抗氧化剂、醋酸乙酯投入反应釜中在55-65℃下搅拌均匀,然后投入计量的4,4-二苯基甲烷二异氰酸酯在75-85℃下反应2小时,反应结束出料;
(2)将A、B、C组分按照比例在20-40℃下混合均匀,静置脱泡,得产物。
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