Preparation and Properties of Room Temperature Curing Polyurethane for Conveyor Belt Repair Adhesive

Tong Zhao; Tong-wei Feng; Yang Meng; Cheng-zhe Zhao; Bing Yu; Ming Tian

doi:10.11777/j.issn1000-3304.2025.25197

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Preparation and Properties of Room Temperature Curing Polyurethane for Conveyor Belt Repair Adhesive

Research Article | 更新时间：2026-01-16

- Preparation and Properties of Room Temperature Curing Polyurethane for Conveyor Belt Repair Adhesive
- Acta Polymerica Sinica Vol. 57, Issue 1, Pages: 157-167(2026)
- 作者机构：
  
  1.北京化工大学有机无机复合材料国家重点实验室北京 100029
  2.无锡宝通科技股份有限公司无锡 214112
- 作者简介：
  
  Bing Yu, E-mail: yubing@mail.buct.edu.cn
  Ming Tian, E-mail: tianm@mail.buct.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2025.25197
  CLC：
- CSTR：32057.14.GFZXB.2025.7491
- Received：21 August 2025，
  
  Accepted：11 October 2025，
  
  Published Online：18 December 2025，
  
  Published：20 January 2026
- 稿件说明：
移动端阅览
赵彤, 冯桐伟, 孟阳, 赵成哲, 于冰, 田明. 用于输送带修补胶的室温固化聚氨酯的制备与性能研究. 高分子学报, 2026, 57(1), 157-167.

Zhao, T.; Feng, T. W.; Meng, Y.; Zhao, C. Z.; Yu, B.; Tian, M. Preparation and properties of room temperature curing polyurethane for conveyor belt repair adhesive. Acta Polymerica Sinica (in Chinese), 2026, 57(1), 157-167.
赵彤, 冯桐伟, 孟阳, 赵成哲, 于冰, 田明. 用于输送带修补胶的室温固化聚氨酯的制备与性能研究. 高分子学报, 2026, 57(1), 157-167. DOI： 10.11777/j.issn1000-3304.2025.25197. CSTR： 32057.14.GFZXB.2025.7491.

Zhao, T.; Feng, T. W.; Meng, Y.; Zhao, C. Z.; Yu, B.; Tian, M. Preparation and properties of room temperature curing polyurethane for conveyor belt repair adhesive. Acta Polymerica Sinica (in Chinese), 2026, 57(1), 157-167. DOI： 10.11777/j.issn1000-3304.2025.25197. CSTR： 32057.14.GFZXB.2025.7491.

摘要

橡胶输送带常受到磨损而影响正常使用，通常使用浇注型聚氨酯等材料作为修补胶对磨损处进行现场修补，但现有聚氨酯修补胶对橡胶的粘接强度难以满足实际需求，且浇注型聚氨酯的结构组成与粘接强度间关系的研究尚不完善. 基于此，本工作利用预聚体法成功制备了可室温固化的聚氨酯涂层，并同时从分子内聚力、润湿能力、粘接界面微观结构等角度对涂层与橡胶间的粘接性能展开研究. 研究结果显示：硬段含量越高，分子内聚力越强，浇注型聚氨酯固化后形成的涂层对橡胶基体越容易形成更好的附着，T型剥离强度最高可达11.73 N/mm；低黏度浇注型聚氨酯有利于形成良好附着，适合的附着层厚度是良好粘接的关键. 除此之外，本工作还研究了软硬段含量对浇注型聚氨酯涂层的拉伸性能、耐磨性能及硬度的影响，为浇注型聚氨酯涂层的制备与性能调控提供了理论支持. 该聚氨酯涂层预期可作为橡胶修补胶，实现对橡胶输送带的室温快速修补.

Abstract

Rubber conveyor belts are often affected by wear

which impacts their normal use. Castable polyurethane and other materials are commonly used as repair adhesives for on-site repairs of the worn areas. However

the peeling strength of existing polyurethane repair adhesives to rubber is difficult to meet the practical requirement

and the relationship between the structural composition and peeling strength of the castable polyurethane is not fully investigated. Therefore

based on the above issues

in this work

a room temperature curable polyurethane coating was successfully prepared using the prepolymer method

and the adhesive performance between the coating and the rubber was simultaneously investigated from the perspectives of molecular cohesion

wettability

and microstructure of the interface

which indicated that the higher the content of hard segments

the stronger the molecular cohesion

and the coating formed after the curing of polyurethane exhibits better adhesion to the rubber matrix

with a T-type peel strength of up to 11.73 N/mm. Low-viscosity polyurethane is beneficial for wetting the rubber surface and resulting in good adhesion

and the appropriate thickness of the adhesive layer is key to achieving good adhesion. In addition

the effects of soft and hard segment content on the tensile properties

wear resistance

and hardness of the polyurethane coatings were also investigated

providing the theoretical support for the preparation and performance regulation of the polyurethane coatings. This polyurethane coating is expected to serve as a rubber repair adhesive

enabling rapid repair of rubber conveyor belts at room temperature.

关键词

Keywords

references

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