CN109957082A - 一种铸造用呋喃树脂的制备方法 - Google Patents

一种铸造用呋喃树脂的制备方法 Download PDF

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CN109957082A
CN109957082A CN201711415217.9A CN201711415217A CN109957082A CN 109957082 A CN109957082 A CN 109957082A CN 201711415217 A CN201711415217 A CN 201711415217A CN 109957082 A CN109957082 A CN 109957082A
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furan resin
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林健
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Yixing Xingnan Composite Material Factory Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G12/00Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C08G12/02Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
    • C08G12/04Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
    • C08G12/10Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with acyclic compounds having the moiety X=C(—N<)2 in which X is O, S or —N
    • C08G12/12Ureas; Thioureas
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G16/00Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00
    • C08G16/02Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes
    • C08G16/0212Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes with acyclic or carbocyclic organic compounds
    • C08G16/0218Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes with acyclic or carbocyclic organic compounds containing atoms other than carbon and hydrogen
    • C08G16/0225Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes with acyclic or carbocyclic organic compounds containing atoms other than carbon and hydrogen containing oxygen

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Abstract

本发明公开了一种铸造用呋喃树脂的制备方法,包括以下步骤:(1)将20~35份甲醛加入反应釜,在搅拌下加入60~80份尿素和40~65份植物裂解醇,升温至70~80℃,反应1~3h;(2)加入0.6~0.9份氢氧化钠溶液将PH值调节至8.5~10后,继续升温至95~100℃,反应0.5h;(3)用冷水降温至50~60℃,加入0.3~0.5份稀醋酸将PH值调节至3.5~4.2;(4)抽真空脱水,冷却至30℃后加入1~3份芳香物质,混合均匀。本发明提供的铸造用呋喃树脂气味芳香,生产成本低,对于推动呋喃树脂的广泛应用,创造经济效益,有着深远的意义。

Description

一种铸造用呋喃树脂的制备方法
技术领域
本发明涉及一种铸造用呋喃树脂的制备方法,属于化工生产技术领域。
背景技术
呋喃树脂是指以具有呋喃环的糠醇和糠醛作原料生产的树脂类的总称,其在强酸作用下固化为不溶和不熔的固形物,种类有糠醇树脂、糠醛树脂、糠酮树脂、糠酮—甲醛树脂等。呋喃树脂具有良好的耐热性和耐腐蚀性,作为一种优质的砂芯粘结剂,特别适用与铸钢、铸铁和其他有色金属铸造行业。
糠醇和甲醛是呋喃树脂的主要成分,糠醇是用经济农作物的秸竿经水解→糖化→加氢催化等一系列繁琐工艺制得,这使得合成呋喃树脂的成本很高,甲醛的游离含量很高,通常为2%~5%,制造和使用过程中,会散发刺激性气味,对空气质量影响较大。
发明内容
发明目的:为了克服现有技术的不足,本发明的目的在于提供一种气味芳香、生产成本低的铸造用呋喃树脂的制备方法。
技术方案:一种铸造用呋喃树脂的制备方法包括以下步骤:
(1)将20~35份甲醛加入反应釜,在搅拌下加入60~80份尿素和40~65份植物裂解醇,升温至70~80℃,反应1~3h;
(2)加入0.6~0.9份氢氧化钠溶液将PH值调节至8.5~10后,继续升温至95~100℃,反应0.5h;
(3)用冷水降温至50~60℃,加入0.3~0.5份稀醋酸将PH值调节至3.5~4.2;
(4)抽真空脱水,冷却至30℃后加入1~3份芳香物质,混合均匀。
优选的,所述步骤(1)搅拌速率为800~1000转/min。
优选的,所述步骤(2)氢氧化钠溶液的浓度为300~350mol/l。
优选的,所述步骤(4)芳香物质为芳樟醇、柠檬烯或月桂醇。
本发明技术方案得到的一种铸造用呋喃树脂的制备方法,以芳樟醇、柠檬烯或月桂醇和甲醛游离分子进行中和,气味更加芳香;以植物裂解醇代替糠醇,在满足性能要求的前提下,大大降低了生产成本,对于推动呋喃树脂的广泛应用,创造经济效益,有着深远的意义。
具体实施方式
下面结合实施例对本发明作进一步的详细说明。应当指出,对于本领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以作出若干改进,这些改进也应视为本发明的保护范围。
实施例1
一种铸造用呋喃树脂的制备方法,按如下步骤进行:
(1)将20份甲醛加入反应釜,在搅拌速率为800转/min下加入60份尿素和40份植物裂解醇,升温至70℃,反应1h;
(2)加入0.6份浓度为300mol/l的氢氧化钠溶液将PH值调节至8.5后,继续升温至95℃,反应0.5h;
(3)用冷水降温至52℃,加入0.3份稀醋酸将PH值调节至3.5;
(4)抽真空脱水,冷却至30℃后加入1份芳樟醇,混合均匀。
实施例2
一种铸造用呋喃树脂的制备方法,按如下步骤进行:
(1)将28份甲醛加入反应釜,在搅拌速率为900转/min下加入72份尿素和51份植物裂解醇,升温至76℃,反应2h;
(2)加入0.7份浓度为325mol/l的氢氧化钠溶液将PH值调节至9后,继续升温至98℃,反应0.5h;
(3)用冷水降温至56℃,加入0.4份稀醋酸将PH值调节至4.0;
(4)抽真空脱水,冷却至30℃后加入2份柠檬烯,混合均匀。
实施例3
一种铸造用呋喃树脂的制备方法,按如下步骤进行:
(1)将35份甲醛加入反应釜,在搅拌速率为980转/min下加入80份尿素和65份植物裂解醇,升温至80℃,反应3h;
(2)加入0.9份浓度为350mol/l的氢氧化钠溶液将PH值调节至10后,继续升温至100℃,反应0.5h;
(3)用冷水降温至60℃,加入0.5份稀醋酸将PH值调节至4.2;
(4)抽真空脱水,冷却至30℃后加入3份月桂醇,混合均匀。

Claims (4)

1.一种铸造用呋喃树脂的制备方法,其特征在于所述方法包括以下步骤:
(1)将20~35份甲醛加入反应釜,在搅拌下加入60~80份尿素和40~65份植物裂解醇,升温至70~80℃,反应1~3h;
(2)加入0.6~0.9份氢氧化钠溶液将PH值调节至8.5~10后,继续升温至95~100℃,反应0.5h;
(3)用冷水降温至50~60℃,加入0.3~0.5份稀醋酸将PH值调节至3.5~4.2;
(4)抽真空脱水,冷却至30℃后加入1~3份芳香物质,混合均匀。
2.根据权利要求1所述的铸造用呋喃树脂的制备方法,其特征在于所述步骤(1)搅拌速率为800~1000转/min。
3.根据权利要求1所述的铸造用呋喃树脂的制备方法,其特征在于所述步骤(2)氢氧化钠溶液的浓度为300~350mol/l。
4.根据权利要求1所述的铸造用呋喃树脂的制备方法,其特征在于所述步骤(4)芳香物质为芳樟醇、柠檬烯或月桂醇。
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1379062A (zh) * 2002-04-10 2002-11-13 山东省桓台东源化工厂 香型呋喃树脂及其制备方法
CN102875756A (zh) * 2012-04-06 2013-01-16 济南圣泉集团股份有限公司 戊糖类化合物替代糠醇生产铸造用自硬呋喃树脂的方法
CN103113548A (zh) * 2013-03-06 2013-05-22 苏州兴业材料科技股份有限公司 新型改性铸造用呋喃树脂的制备方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1379062A (zh) * 2002-04-10 2002-11-13 山东省桓台东源化工厂 香型呋喃树脂及其制备方法
CN102875756A (zh) * 2012-04-06 2013-01-16 济南圣泉集团股份有限公司 戊糖类化合物替代糠醇生产铸造用自硬呋喃树脂的方法
CN103113548A (zh) * 2013-03-06 2013-05-22 苏州兴业材料科技股份有限公司 新型改性铸造用呋喃树脂的制备方法

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Application publication date: 20190702