CN108264837B - 无溶剂聚氨酯自流平地坪面漆及其制备工艺 - Google Patents
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Abstract
本发明提供了一种无溶剂聚氨酯自流平地坪面漆,包含组分A和组分B,其中组分A由以下重量份数的原材料组成:无溶剂羟基醇酸树脂40‑60份,分散剂0.4‑1.0份,消泡剂0.8‑1.7份,钛白3‑5份,炭黑0.1‑1份,气相二氧化硅0.1‑0.5份,有机膨润土0.5‑1份,粉末分子筛3‑10份,硅微粉20‑30份,其中组分B为:脂肪族异氰酸酯聚合物。该无溶剂聚氨酯自流平地坪面漆具有优异的强度、耐候性及耐磨性能。
Description
技术领域
本发明涉及涂料技术领域,具体涉及一种无溶剂聚氨酯自流平地坪面漆,同时,本发明还涉及该涂料的制备工艺。
背景技术
目前,市场中的地坪主要以环氧地坪为主,环氧地坪硬度偏高,柔韧性较差,并且在紫外线的照射下易变色、粉化,低温情况下干燥困难,这严重限制了地坪的使用范围。聚氨酯地坪不仅具有优秀的弹性以及耐候性,并且低温情况下亦可干燥。
发明内容
本发明提供一种无溶剂聚氨酯自流平地坪面漆,具有优异的弹性,干燥性、耐冲击性、耐磨性以及耐候性。
一种无溶剂聚氨酯自流平地坪面漆,包含组分A和组分B,其中组分A由以下重量份数的原材料组成:
其中组分B为:脂肪族异氰酸酯聚合物。
进一步的,所述组分B为HDI三聚体,结构式如下:
进一步的,所述组分B固含为100%,NCO含量为30%-35%。
进一步的,组分A与组分B质量比为4-6:1。
进一步的,所述分散剂为BYK-111、EFKA-4010的混合物。
进一步的,所述消泡剂为BYK-052、BYK-066的混合物。
进一步的,所述组分A由以下重量份数的原材料组成:
所述组分B为:脂肪族异氰酸酯聚合物。
进一步的,所述所述的无溶剂羟基醇酸树脂由以下重量份数计的原料制备而成:
进一步的,所述的无溶剂羟基醇酸树脂由以下步骤制备而成:
步骤a:将蓖麻油加入反应釜中,搅拌升温至200℃,停搅拌加入催化剂,搅拌继续升温至210℃时,停搅拌加入甘油,开搅拌升温至225±2℃,保持该温度反应1h,反应式如下:
R代表:-(CH2)7-HC=CH-CH2-CH-(CH2)5-CH3
步骤b:降温至160℃停搅拌加入己二酸以及石油二甲苯,同时将分水器中垫满石油二甲苯,
步骤c:升温至225±2℃,保温反映3h后测酸价,待酸价降至1以下时抽真空;
反应式如下:
步骤d:抽真空在固含量达到99%以上时降温,降温至60℃用120目绢布过滤,即得到无溶剂羟基醇酸树脂。
上述的无溶剂聚氨酯自流平地坪面漆的制备工艺,由以下方法制备而成:
将无溶剂羟基醇酸树脂、分散剂、消泡剂以及钛白、炭黑搅拌均匀后研磨至细度≤30μm,加入气相二氧化硅、有机膨润土、粉末分子筛,高速搅拌20-30min,后投入到真空搅拌机中,低速搅拌状态下抽真空30-60min即得到无溶剂聚氨酯自流平地坪面漆组分A,组分B为脂肪族异氰酸酯聚合物。
组分A与组分B的反应机理如下:
本发明所述的无溶剂聚氨酯自流平地坪面漆具有以下有益效果:
(1)本发明采用自主研发的无溶剂羟基醇酸树脂与脂肪族异氰酸酯聚合物交联固化成膜,选用气相二氧化硅与有机膨润土复配来提高体系的防沉稳定性,配方中添加适量的粉末分子筛,能吸附配方中的水分子,具有优异的干燥性能,避免聚氨酯体系与水的副反应,从而影响漆膜性能,保证体系的储存稳定性以及漆膜优异的强度及耐磨性能。
(2)本发明分散剂为BYK-111、EFKA-4010的混合物,BYK-111为低分子量含酸性基团的共聚物,改善颜料润湿,减少研磨过程所需时间并使颜料分散稳定化的无溶剂型涂料用润湿和分散助剂。EFKA-4010为改性聚氨酯高聚物,由于其长链的立体位阻改性,可以使其拥有较低的研磨粘度。这两种分散剂搭配使用,保证颜填料较好分散的同时,使整个涂料的体系粘度降到最低。
(3)本发明消泡剂为BYK-052、BYK-066的混合物,BYK-052为不含有机硅的破泡聚合物溶液,防止涂料在生产、填充和使用时形成泡沫,具有自发的消泡性能,在有覆盖涂层的时候对涂层间的附着力没有负面影响;BYK-066为不含有机硅的破泡聚合物溶液,可以很好地消除表面气泡,确保表面无针孔。这两种消泡剂配合使用,保证体系优异的破泡消泡性,且最终涂膜外观平整光滑。
(4)本发明采用蓖麻油作为植物油,甘油作为多元醇,己二酸作为多元酸,合成含羟基的无溶剂醇酸树脂,其分子量适中,与HDI三聚体交联固化成膜后,由于其分子中不含有苯环,不会因为紫外线照射发生黄变粉化等,耐候性优良,并且由于聚氨酯中氢键的存在,在具有弹性的同时具有较高的强度以及耐磨性等。
具体实施方式
基于本发明的设计思想,下面,结合具体的实施例对本发明的一种无溶剂聚氨酯自流平地坪面漆做进一步的详细描述:
实施例1-3
无溶剂羟基醇酸树脂原料重量组成如下表所示:
实施例1-3的无溶剂羟基醇酸树脂由以下步骤制备而成:
步骤a:将蓖麻油加入反应釜中,搅拌升温至200℃,停搅拌加入催化剂,搅拌继续升温至210℃时,停搅拌加入甘油,开搅拌升温至225±2℃,保持该温度反应1h;
步骤b:降温至160℃停搅拌加入己二酸以及石油二甲苯,同时将分水器中垫满石油二甲苯;
步骤c:升温至225±2℃,保温反映3h后测酸价,待酸价降至1以下时抽真空;
步骤d:抽真空在固含量达到99%以上时降温,降温至60℃用120目绢布过滤,即得到无溶剂羟基醇酸树脂。
将实施例1-3制备的无溶剂羟基醇酸树脂分别用于制备实施例1-3中的无溶剂聚氨酯自流平地坪面漆,无溶剂聚氨酯自流平地坪面漆原料重量组成如下表所示:
组分B重量组成如下表所示:
实施例1-3的无溶剂聚氨酯自流平地坪面漆采用以下方法制备得到:
将无溶剂羟基醇酸树脂、BYK-111、EFKA-4010、BYK-052、BYK-066以及钛白、炭黑搅拌均匀后研磨至细度≤30μm,加入气相二氧化硅、有机膨润土、粉末分子筛,高速搅拌20-30min,后投入到真空搅拌机中,低速搅拌状态下抽真空30-60min即得到无溶剂聚氨酯自流平地坪面漆组分A,组分B为HDI三聚体。
将实施例1-3制备得到的组分A与组分B按配方重量比混合均匀,对无溶剂聚氨酯自流平地坪面漆进行性能测试,检测结果如下表所示:
Claims (5)
1.一种无溶剂聚氨酯自流平地坪面漆,其特征在于,所述无溶剂聚氨酯自流平地坪面漆包含组分A和组分B,其中组分A由以下重量份数的原材料组成:
其中组分B为:脂肪族异氰酸酯聚合物;
所述组分B脂肪族异氰酸酯聚合物为HDI三聚体,结构式如下:
所述组分B固含为100%,NCO含量为30%-35%;
所述的无溶剂羟基醇酸树脂由以下重量份数计的原料制备而成:
所述的无溶剂羟基醇酸树脂由以下步骤制备而成:
步骤a:将蓖麻油加入反应釜中,搅拌升温至200℃,停搅拌加入催化剂,搅拌继续升温至210℃时,停搅拌加入甘油,开搅拌升温至225±2℃,保持该温度反应1h,
步骤b:降温至160℃停搅拌加入己二酸以及石油二甲苯,同时将分水器中垫满石油二甲苯,
步骤c:升温至225±2℃,保温反映3h后测酸价,待酸价降至1以下时抽真空,
步骤d:抽真空在固含量达到99%以上时降温,降温至60℃用120目绢布过滤,即得到无溶剂羟基醇酸树脂。
2.根据权利要求1所述的无溶剂聚氨酯自流平地坪面漆,其特征在于,组分A与组分B质量比为4-6:1。
3.根据权利要求1所述的无溶剂聚氨酯自流平地坪面漆,其特征在于,所述分散剂为BYK-111、EFKA-4010的混合物。
4.根据权利要求3所述的无溶剂聚氨酯自流平地坪面漆,其特征在于,所述消泡剂为BYK-052、BYK-066的混合物。
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JPS61145258A (ja) * | 1984-12-18 | 1986-07-02 | Dainippon Toryo Co Ltd | ウレタン樹脂塗料組成物 |
US5502148A (en) * | 1993-01-28 | 1996-03-26 | Bayer Aktiengesellschaft | Two-component polyurethane coating compositions and their use for coating or sealing floors |
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JPS61145258A (ja) * | 1984-12-18 | 1986-07-02 | Dainippon Toryo Co Ltd | ウレタン樹脂塗料組成物 |
US5502148A (en) * | 1993-01-28 | 1996-03-26 | Bayer Aktiengesellschaft | Two-component polyurethane coating compositions and their use for coating or sealing floors |
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