WO2020024539A1 - 耐溶剂聚氨酯弹性体及其制备方法 - Google Patents

耐溶剂聚氨酯弹性体及其制备方法 Download PDF

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WO2020024539A1
WO2020024539A1 PCT/CN2018/122977 CN2018122977W WO2020024539A1 WO 2020024539 A1 WO2020024539 A1 WO 2020024539A1 CN 2018122977 W CN2018122977 W CN 2018122977W WO 2020024539 A1 WO2020024539 A1 WO 2020024539A1
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component
polyurethane elastomer
solvent
resistant polyurethane
polyester polyol
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PCT/CN2018/122977
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English (en)
French (fr)
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刘兆阳
李涛
董良
王加良
高振胜
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山东一诺威聚氨酯股份有限公司
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Publication of WO2020024539A1 publication Critical patent/WO2020024539A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
    • C08G18/6633—Compounds of group C08G18/42
    • C08G18/6637—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/664—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
    • C08G18/3203—Polyhydroxy compounds
    • C08G18/3215—Polyhydroxy compounds containing aromatic groups or benzoquinone groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
    • C08G18/4244—Polycondensates having carboxylic or carbonic ester groups in the main chain containing oxygen in the form of ether groups
    • C08G18/4247—Polycondensates having carboxylic or carbonic ester groups in the main chain containing oxygen in the form of ether groups derived from polyols containing at least one ether group and polycarboxylic acids
    • C08G18/425—Polycondensates having carboxylic or carbonic ester groups in the main chain containing oxygen in the form of ether groups derived from polyols containing at least one ether group and polycarboxylic acids the polyols containing one or two ether groups

Definitions

  • the invention belongs to the technical field of polyurethane application, and particularly relates to a solvent-resistant polyurethane elastomer and a preparation method thereof.
  • Polyurethane elastomers whose elastic modulus is between rubber and plastic, have the excellent properties of both. Because of its high strength, tear resistance, abrasion resistance, good flexibility, resistance to grease and chemicals, So it is widely used.
  • Synthetic polyurethane polyols have a wide variety of raw materials and diverse formulations. According to the basic raw material ingredients, they can be divided into polyester, polyether, and polyolefin types.
  • Various types of polyurethane elastomers are suitable for different environments. In practical applications, because polyurethane products used in the printing and dyeing industry have been in contact with organic solvents such as alcohols, esters, and ketones for a long time, improving the solvent resistance of polyurethane can broaden its application fields.
  • TDI polyurethane has been widely used for a long time, but because of the low saturated vapor pressure of TDI, it is volatile and has high toxicity, which causes great harm to people during production and processing.
  • the MDI type two-component BDO system has been widely used, but the two-component BDO system has a relatively large viscosity during use, is inconvenient to operate, and has certain limitations during use.
  • the object of the present invention is to provide a solvent-resistant polyurethane elastomer.
  • the elastomer not only has high solvent resistance, but also has a low system viscosity and convenient operation.
  • the invention also provides a preparation method, which is scientific. Reasonable and simple.
  • the solvent-resistant polyurethane elastomer according to the present invention is made of component A, component B and component C in a mass ratio of 100: 20-30: 3-15, wherein component A is made of polyester polyol at 100 It is prepared by vacuum dehydration at -120 ° C.
  • the polyester polyol is a polysuccinic polyester polyol containing ethylene glycol and diethylene glycol. The molar percentage of ethylene glycol to the total amount of ethylene glycol and diethylene glycol is 50. -80%, the B component is an isocyanate, and the C component is a curing agent component, which is obtained by dehydrating an alcohol chain extender with a catalyst.
  • the vacuum dehydration time is 1-2 hours, and the vacuum degree is 0.095 MPa.
  • the polyester polyol dehydration temperature can be adjusted according to the actual situation, for example, it can be 110 ° C, 115 ° C, and the like.
  • the number average molecular weight of the polyester polyol is 1500-3000, and the functionality is 2.
  • the polyester polyol is PE560.
  • the moisture content in the A component is ⁇ 0.03%.
  • the component B has a cyanate ester group (NCO) content of 25-35%.
  • the isocyanate consists of the following raw materials in weight percentages:
  • the content of the diisocyanate MDI-100 can be reasonably adjusted within the above range according to actual needs, such as 0%, 20%, 30%, 50%, etc .; the carbodiimide-modified liquefied MDI
  • the content can be taken within the above range according to the actual reaction needs, for example, it can be 50%, 75%, 100%, and the like.
  • the alcohol-based chain extender is one or more of hydroquinone diethanol ether, resorcinol di (2-hydroxyethyl) ether, or 1,4-butanediol.
  • the catalyst is a bismuth, zinc, mercury or amine catalyst.
  • the amount of the catalyst is 1-10% of the total mass of the C component.
  • the water content in the C component is ⁇ 0.03%.
  • the water content refers to the water content of the alcohol-based chain extender after dehydration.
  • the method for preparing the solvent-resistant polyurethane elastomer according to the present invention includes the following steps:
  • a product with good operability, good solvent resistance, excellent comprehensive performance and environmental protection is prepared, compared with ordinary polyurethane elastomers. Its solvent resistance is improved to a certain extent. In the working environment of solvents such as cyclohexanone and toluene, its solvent resistance is improved.
  • the hardness of the prepared polyurethane elastomer is 60-85A.
  • the polyurethane elastomer according to the present invention is produced by a one-step method without a pre-polymerization process.
  • the polyurethane elastomer has low system viscosity, convenient operation, and improved solvent resistance, and can meet the application of certain organic solvent environments.
  • the product has a high molding speed and high production efficiency; the post-vulcanization speed is low and the time is short, and the energy consumption is reduced; not only is simple and easy, but also conducive to extending the life of the mold, and is suitable for large-scale industrial production .
  • MDI-100 4,4'-diphenylmethane diisocyanate
  • HQEE hydroquinone diethanol ether
  • HER resorcinol bis (2-hydroxyethyl) ether.
  • the components of the solvent-resistant polyurethane elastomer are as follows:
  • Component A PE-560 is dehydrated at a temperature of 100 ° C and a vacuum of 0.095 MPa to a moisture content of ⁇ 0.03% to obtain component A.
  • Component B MDI-100 50%, liquefied MDI 50%, vacuum (-0.095 MPa) to remove air bubbles to obtain component B with an isocyanate content of 31.5%.
  • Component C HQEE with moisture content ⁇ 0.03%, 95.2%, mercury catalyst 4.8%, and component C can be obtained by mixing evenly.
  • the preparation method is as follows:
  • the temperature of component B is controlled at 40 ° C, the temperature of component C is 100 ° C, and the temperature of component A is 95 ° C.
  • the components of the solvent-resistant polyurethane elastomer are as follows:
  • Component A PE-560 is dehydrated at a temperature of 100 ° C and a vacuum of 0.095 MPa to a moisture content of ⁇ 0.03% to obtain component A.
  • Component B Liquefied MDI, and removing bubbles in vacuum (-0.095 MPa) to obtain component B with an isocyanate content of 29.4%.
  • Component C HQEE 75.1%, HER18.8%, amine catalyst 2.1% with moisture content ⁇ 0.03%, and the component C can be obtained by mixing uniformly.
  • the preparation method is as follows:
  • the temperature of the B component is controlled at 40 ° C, the temperature of the C component is 100 ° C, and the temperature of the A component is 95 ° C.
  • the components of the solvent-resistant polyurethane elastomer are as follows:
  • Component A PE-560 is dehydrated at a temperature of 100 ° C and a vacuum of 0.095 MPa to a moisture content of ⁇ 0.03% to obtain component A.
  • Component B Liquefied MDI, and removing bubbles in vacuum (-0.095 MPa) to obtain component B with an isocyanate content of 29.4%.
  • Component C HER91.3% with moisture content ⁇ 0.03%, mercury catalyst 8.7%, and component C can be obtained by mixing uniformly.
  • the preparation method is as follows:
  • the temperature of component B is controlled at 40 ° C, the temperature of component C is 100 ° C, and the temperature of component A is 95 ° C.
  • the components of the solvent-resistant polyurethane elastomer are as follows:
  • Component A PE-560 is dehydrated at a temperature of 100 ° C and a vacuum of 0.095 MPa to a moisture content of ⁇ 0.03% to obtain component A.
  • Component B Liquefied MDI, and removing bubbles in vacuum (-0.095 MPa) to obtain component B with an isocyanate content of 29.4%.
  • Component C HQEE 81.9% with moisture content ⁇ 0.03%, BDO 9.1%, and bismuth catalyst 1.5%.
  • the component C is obtained by uniform mixing.
  • the preparation method is as follows:
  • the temperature of component B is controlled at 40 ° C, the temperature of component C is 100 ° C, and the temperature of component A is 95 ° C.
  • the polyurethane elastomer has the following components:
  • Component B PE-2420, 73%, MDI-100, 27%, react at 80 ° C for 3 hours, and remove bubbles in vacuum (-0.095 MPa) to obtain a prepolymer having an isocyanate content of 6.0%.
  • Component C 100% BDO with moisture content ⁇ 0.03% to obtain component C.
  • the preparation method is as follows:
  • the polyurethane elastomer has the following components:
  • Component B PE-2320, 86.2%, TDI-100, 13.8%, react at 80 ° C for 3 hours, and remove air bubbles under vacuum (-0.095 MPa) to obtain a prepolymer having an isocyanate content of 3.0%.
  • Component C MOCA 100%, component C is obtained.
  • the preparation method is as follows:
  • the polyurethane elastomer has the following components:
  • Component A PE-2420 is dehydrated at a temperature of 100 ° C and a vacuum of 0.095 MPa to a moisture content of ⁇ 0.03% to obtain component A.
  • Component B PE-2420, 50.5%, MDI-100, 39.6%, liquefied MDI, 9.9%, reaction at 80 ° C for 3 hours, and debubbling under vacuum (-0.095MPa) to obtain a prepolymer having an isocyanate content of 14% .
  • Component C BDO with moisture content ⁇ 0.03%, 99%, amine catalyst 1%, and mixed to obtain component C.
  • the preparation method is as follows:
  • the solvent resistance test of the product is carried out under the following conditions: the sample is immersed in a cyclohexanone solution at a constant temperature of 25 ° C.
  • the performance test results of the examples and comparative examples are shown in Table 1.
  • Table 1 is a performance test result table of the polyurethane elastomer obtained in Examples 1-4 of the present invention and Comparative Examples 1-3. Comparing with Comparative Examples 1-3, it can be seen that the present invention is prepared by using PE560 polyester polyol and HQEE and HER. Compared with the polyester polyols PE2420, PE2320 and different isocyanate prepolymers, the obtained polyurethane elastomers have significantly improved solvent resistance.

Abstract

一种耐溶剂聚氨酯弹性体及其制备方法，所述的耐溶剂聚氨酯弹性体，由A组分、B组分和C组分按质量比100：20-30：3-15制成，其中，A组分由聚酯多元醇在100-120℃下真空脱水制得，所述聚酯多元醇为含有乙二醇和二甘醇的聚丁二酸聚酯多元醇，乙二醇占乙二醇和二甘醇总量的摩尔百分比为50-80％，B组分为异氰酸酯，C组分为固化剂组分，由醇类扩链剂脱水后与催化剂混合而得。所述的耐溶剂聚氨酯弹性体体系粘度低，可操作性好、耐溶剂性能好、综合性能优越和环保的产品，与普通聚氨酯弹性体相比，其耐溶剂性一定程度提高；同时提供了简单易行的制备方法。

Description

耐溶剂聚氨酯弹性体及其制备方法 技术领域
本发明属于聚氨酯应用技术领域，具体涉及一种耐溶剂聚氨酯弹性体及其制备方法。
背景技术
聚氨酯弹性体，其弹性模量处于橡胶和塑料之间且兼具两者的优异性能，因具有高强度、抗撕裂、耐磨耗、挠曲性能好、耐油脂及化学品等出众优点，因而得到广泛应用。合成聚氨酯多元醇的原材料品种繁多，配方多样，按基础原材料成分分类，可以分为聚酯型、聚醚型和聚烯烃型，各种类型聚氨酯弹性体适应环境不同。在实际的应用中，由于印刷印染行业用的聚氨酯产品长时间接触有机溶剂，如醇、酯、酮等，因此，提高聚氨酯的耐溶剂性可以拓宽其应用领域。
TDI型聚氨酯长期以来被广泛使用，但由于TDI饱和蒸汽压低，易挥发，毒性大，在生产和加工过程中对人造成较大的危害。MDI类型双组分BDO体系得到广泛的应用，但双组分BDO体系在使用过程中粘度相对较大，操作不方便，在使用过程中存在一定的局限性。
发明内容
针对现有技术的不足，本发明的目的是提供一种耐溶剂聚氨酯弹性体，该弹性体不仅具有较高的耐溶剂性，而且体系粘度低，操作方便；本发明还提供其制备方法，科学合理、简单易行。
本发明所述的耐溶剂聚氨酯弹性体，由A组分、B组分和C组分按质量比100：20-30：3-15制成，其中，A组分由聚酯多元醇在100-120℃下真空脱水制得，所述聚酯多元醇为含有乙二醇和二甘醇的聚丁二酸聚酯多元醇，乙二醇占乙二醇和二甘醇总量的摩尔百分比为50-80％，B组分为异氰酸酯，C组分为固化剂组分，由醇类扩链剂脱水后与催化剂混合而得。
优选地，所述的真空脱水时间为1-2小时，真空度为0.095MPa。
所述的聚酯多元醇脱水温度可根据实际进行调整，例如可以为110℃、115℃等。
所述的聚酯多元醇的数均分子量为1500-3000，官能度为2。
优选地，所述的聚酯多元醇为PE560。
所述的A组分中水分含量≤0.03％。
所述的B组分，氰酸酯基(NCO)的含量为25-35％。
所述的异氰酸酯由如下重量百分数的原料组成：
二异氰酸酯MDI-100                 0-50％；
碳化二亚胺改性的液化MDI           50-100％。
所述二异氰酸酯MDI-100的含量可根据实际需要在上述范围内进行合理地调整，如可以为0％、20％、30％、50％等；所述碳化二亚胺改性的液化MDI的含量可根据实际反应需要在上述范围内取值，例如可以为50％、75％、100％等。
所述的醇类扩链剂为对苯二酚二乙醇醚、间苯二酚二(2-羟乙基)醚或1,4-丁二醇中的一种或几种。
所述的催化剂为铋类、锌类、汞类或胺类催化剂。
所述的催化剂的用量为C组分总质量的1-10％。
所述C组分中水分含量≤0.03％，此处，水分含量是指醇类扩链剂脱水后的水分含量。
本发明所述的耐溶剂聚氨酯弹性体的制备方法，包括以下步骤：
(1)将A组分、B组分和C组分混合均匀，浇入模具中硫化成型，混合温度为80-110℃，模具温度为90-100℃；
(2)20-50分钟开模，80-100℃下后硫化10-16小时，得产品。
与现有技术相比，本发明的有益效果如下：
1、本发明通过使用含有一定比例的乙二醇的聚丁二酸聚酯多元醇，制得可操作性好、耐溶剂性能好、综合性能优越和环保的产品，与普通聚氨酯弹性体相比，其耐溶剂性一定程度提高，在环己酮、甲苯等溶剂工作环境中，其耐溶剂性能提高，所制备的聚氨酯弹性体的硬度为邵60-85A。
2、本发明所述的聚氨酯弹性体，采用一步法生产，未经过预聚过程，具有体系粘度低，操作方便，耐溶剂性提高，满足一定有机溶剂环境的应用。
3、本发明所述的制备方法，产品的成型速度快，生产效率高；后硫化速度低且时间短，降低能耗；不仅简单易行，而且有利于延长模具寿命，适用于大规模工业化生产。
具体实施方式
下面结合实施例对本发明做进一步说明，但不限定本发明。
实施例所用材料如下：
PE-560：聚丁二酸聚酯二元醇，数均分子量1800，由丁二酸、二甘醇和乙二醇制备而成，其中，二甘醇：乙二醇＝1：1(摩尔比)；
PE-2320：聚己二酸聚酯二元醇，数均分子量1500，由己二酸、1,4-丁二醇和乙二醇制备而成，其中，1,4-丁二醇：乙二醇＝1：1(摩尔比)；
PE-2420：聚己二酸聚酯二元醇，数均分子量2000，由己二酸、1,4-丁二醇和乙二醇制备而成，其中，1,4-丁二醇：乙二醇＝1：1(摩尔比)；
MDI-100：4,4'-二苯基甲烷二异氰酸酯；
液化MDI：碳化二亚胺改性的MDI-100；
BDO：1,4-丁二醇；
HQEE：对苯二酚二乙醇醚；
HER：间苯二酚二(2-羟乙基)醚。
实施例1
所述的耐溶剂聚氨酯弹性体，组分如下：
A组分：将PE-560在温度100℃，真空度0.095MPa条件下脱水至水分含量≤0.03％，得到A组分。
B组分：MDI-100 50％，液化MDI 50％，真空(-0.095MPa)脱除气泡，得到异氰酸根含量为31.5％的B组分。
C组分：水分含量≤0.03％的HQEE 95.2％，汞催化剂4.8％，混合均匀得到C组分。
制备方法如下：
B组分的温度控制在40℃，C组分温度100℃，A组分温度95℃，将A组分、B组分和C组分按照A：B：C＝100：25：8的质量比例混合均匀后，浇注入90℃的模具中，30分钟开模，100℃条件下后硫化16h后，得到硬度为邵氏80A的聚氨酯弹性体。
实施例2
所述的耐溶剂聚氨酯弹性体，组分如下：
A组分：将PE-560在温度100℃，真空度0.095MPa条件下脱水至水分含量≤0.03％，得到A组分。
B组分：液化MDI，真空(-0.095MPa)脱除气泡，得到异氰酸根含量为29.4％的B组分。
C组分：水分含量≤0.03％的HQEE75.1％，HER18.8％，胺催化剂2.1％，混合均匀得到C组分。
制备方法如下：
B组分的温度控制在40℃，C组分温度100℃，A组分温度95℃，将A组分、B组分和C组分按照A：B：C＝100：25.2：6的质量比例混合均匀后，浇注入90℃的模具中，30分钟开模，100℃条件下后硫化16h后，得到硬度为邵氏75A的聚氨酯弹性体。
实施例3
所述的耐溶剂聚氨酯弹性体，组分如下：
A组分：将PE-560在温度100℃，真空度0.095MPa条件下脱水至水分含量≤0.03％，得到A组分。
B组分：液化MDI，真空(-0.095MPa)脱除气泡，得到异氰酸根含量为29.4％的B组分。
C组分：水分含量≤0.03％的HER91.3％，汞催化剂8.7％，混合均匀得到C组分。
制备方法如下：
B组分的温度控制在40℃，C组分温度100℃，A组分温度95℃，将A组分、B组分和C组分按照A：B：C＝100：23.8：4的质量比例混合均匀后，浇注入90℃的模具中，30分钟开模，100℃条件下后硫化16h后，得到硬度为邵氏65A的聚氨酯弹性体。
实施例4
所述的耐溶剂聚氨酯弹性体，组分如下：
A组分：将PE-560在温度100℃，真空度0.095MPa条件下脱水至水分含量≤0.03％，得到A组分。
B组分：液化MDI，真空(-0.095MPa)脱除气泡，得到异氰酸根含量为29.4％的B组分。
C组分：水分含量≤0.03％的HQEE81.9％，BDO9.1％，铋催化剂1.5％，混合均匀得到C组分。
制备方法如下：
B组分的温度控制在40℃，C组分温度100℃，A组分温度95℃，将A组分、B组分和C组分按照A：B：C＝100：22.8：4的质量比例混合均匀后，浇注入90℃的模具中，30分钟开模，100℃条件下后硫化16h后，得到硬度为邵氏60A的聚氨酯弹性体。
对比例1
所述的聚氨酯弹性体，组分如下：
B组分：PE-2420 73％，MDI-100 27％，在80℃反应3小时，真空(-0.095MPa)脱除气泡，得到异氰酸根含量为6.0％的预聚体。
C组分：水分含量≤0.03％的BDO 100％，得到C组分。
制备方法如下：
B组分的温度控制在80℃，按照C/B＝6.1/100的质量比例混合均匀后，浇注入110℃的模具中，50分钟开模，100℃条件下后硫化12h后，得到硬度为邵氏80A聚氨酯弹性体。
对比例2
所述的聚氨酯弹性体，组分如下：
B组分：PE-2320 86.2％，TDI-100 13.8％，在80℃反应3小时，真空(-0.095MPa)脱除气泡，得到异氰酸根含量为3.0％的预聚体。
C组分：MOCA 100％，得到C组分。
制备方法如下：
B组分的温度控制在80℃，C组分的温度控制在115℃按照C/B＝8.6/100的质量比例混合 均匀后，浇注入110℃的模具中，50分钟开模，100℃条件下后硫化12h后，得到硬度为邵氏80A聚氨酯弹性体。
对比例3
所述的聚氨酯弹性体，组分如下：
A组分：将PE-2420在温度100℃，真空度0.095MPa条件下脱水至水分含量≤0.03％，得到A组分。
B组分：PE-2420 50.5％，MDI-100 39.6％，液化MDI 9.9％，在80℃反应3小时，真空(-0.095MPa)脱除气泡，得到异氰酸根含量为14％的预聚体。
C组分：水分含量≤0.03％的BDO 99％，胺催化剂1％，混合均匀得到C组分。
制备方法如下：
A、B、C三组分的温度控制在50℃，按照C/A/B＝11.3/70/100的质量比例混合均匀后，浇注入100℃的模具中，30分钟开模，100℃条件下后硫化12h后，得到硬度为邵氏80A聚氨酯弹性体。
制品的耐溶剂测试，测试条件为：将样品在环己酮溶液中25℃恒温浸泡。实施例和对比例的性能测试结果见表1。
表1实施例1-4和对比例1-3的性能测试结果
项目 实施例1 实施例2 实施例3 实施例4 对比例1 对比例2 对比例3
硬度/邵A 80 75 65 60 80 80 80
24h溶胀率％ 12 11 14 14.3 32.2 33.5 36.7
48h溶胀率％ 13.9 12.5 15.8 16.1 37.6 39.4 42.2
表1为本发明实施例1-4与对比例1-3所获得的聚氨酯弹性体的性能测试结果表，与对比例1-3进行对比可知，本发明采用PE560聚酯多元醇和HQEE、HER制备获得的聚氨酯弹性体，相比于聚酯多元醇PE2420，PE2320和不同的异氰酸酯预聚制备的聚氨酯弹性体其耐溶剂性有显著的提高。

Claims (10)

  1. 一种耐溶剂聚氨酯弹性体，其特征在于：由A组分、B组分和C组分按质量比100：20-30：3-15制成，其中，A组分由聚酯多元醇在100-120℃下真空脱水制得，所述的聚酯多元醇为含有乙二醇和二甘醇的聚丁二酸聚酯多元醇，乙二醇占乙二醇和二甘醇总量的摩尔百分比为50-80％，B组分为异氰酸酯，C组分为固化剂组分，由醇类扩链剂脱水后与催化剂混合而得。
  2. 根据权利要求1所述的耐溶剂聚氨酯弹性体，其特征在于：所述的真空脱水时间为1-2小时，真空度为0.095MPa。
  3. 根据权利要求1所述的耐溶剂聚氨酯弹性体，其特征在于：所述的聚酯多元醇的数均分子量为1500-3000，官能度为2。
  4. 根据权利要求3所述的耐溶剂聚氨酯弹性体，其特征在于：所述的聚酯多元醇为PE560。
  5. 根据权利要求1所述的耐溶剂聚氨酯弹性体，其特征在于：所述的B组分，氰酸酯基的含量为25-35％。
  6. 根据权利要求1所述的耐溶剂聚氨酯弹性体，其特征在于：所述的异氰酸酯由如下重量百分数的原料组成：
    二异氰酸酯MDI-100                 0-50％；
    碳化二亚胺改性的液化MDI           50-100％。
  7. 根据权利要求1所述的耐溶剂聚氨酯弹性体，其特征在于：所述的醇类扩链剂为对苯二酚二乙醇醚、间苯二酚二(2-羟乙基)醚或1,4-丁二醇中的一种或几种。
  8. 根据权利要求1所述的耐溶剂聚氨酯弹性体，其特征在于：所述的催化剂为铋类、锌类、汞类或胺类催化剂。
  9. 根据权利要求1所述的耐溶剂聚氨酯弹性体，其特征在于：所述的催化剂的用量为C组分总质量的1-10％。
  10. 一种权利要求1-9任一所述的耐溶剂聚氨酯弹性体的制备方法，其特征在于：
    (1)将A组分、B组分和C组分混合均匀，浇入模具中硫化成型，混合温度为80-110℃，模具温度为90-100℃；
    (2)20-50分钟开模，80-100℃下后硫化10-16小时，得产品。
PCT/CN2018/122977 2018-08-03 2018-12-24 耐溶剂聚氨酯弹性体及其制备方法 WO2020024539A1 (zh)

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