A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
NDI type polyurethane elastomer under-rail backing plate and preparation method thereof
The invention provides an NDI type polyurethane elastomer under-rail backing plate and a preparation method thereof, the NDI type polyurethane elastomer under-rail backing plate is prepared by reaction of a component A and a component B, and the component A is prepared by reaction of polymer polyol A and 1, 5-naphthalene diisocyanate. The component B comprises polymer polyol B, a chain extender and a catalyst, and the weight ratio of the component A to the component B is 100: (20-60). 1, 5-naphthalene diisocyanate with a special molecular structure is selected from the component A to obtain a polyurethane elastomer with a compact hard segment and good microphase separation, and the lower rail backing plate prepared from the polyurethane elastomer has the advantages of high tear strength, low abrasion, low compression set, low dynamic and static stiffness ratio and good fatigue resistance; and the service life of the under-rail backing plate can be prolonged.
本发明提供一种NDI型聚氨酯弹性体轨下垫板及其制备方法，所述NDI型聚氨酯弹性体轨下垫板由A组分和B组分反应制成，所述A组分由聚合物多元醇A和1,5‑萘二异氰酸酯反应制成。B组分包括聚合物多元醇B、扩链剂和催化剂，所述A组分和B组分的重量比为100：(20～60)。通过在所述A组分选用分子结构特殊的1，5‑萘二异氰酸酯，得到具有紧密硬段和良好微相分离的聚氨酯弹性体，用其制备的聚氨酯弹性体轨下垫板具有撕裂强度高，磨耗低，压缩永久变形低，动静刚度比低，耐疲劳性好的优点，可以提高轨下垫板的使用寿命。
NDI type polyurethane elastomer under-rail backing plate and preparation method thereof
The invention provides an NDI type polyurethane elastomer under-rail backing plate and a preparation method thereof, the NDI type polyurethane elastomer under-rail backing plate is prepared by reaction of a component A and a component B, and the component A is prepared by reaction of polymer polyol A and 1, 5-naphthalene diisocyanate. The component B comprises polymer polyol B, a chain extender and a catalyst, and the weight ratio of the component A to the component B is 100: (20-60). 1, 5-naphthalene diisocyanate with a special molecular structure is selected from the component A to obtain a polyurethane elastomer with a compact hard segment and good microphase separation, and the lower rail backing plate prepared from the polyurethane elastomer has the advantages of high tear strength, low abrasion, low compression set, low dynamic and static stiffness ratio and good fatigue resistance; and the service life of the under-rail backing plate can be prolonged.
本发明提供一种NDI型聚氨酯弹性体轨下垫板及其制备方法，所述NDI型聚氨酯弹性体轨下垫板由A组分和B组分反应制成，所述A组分由聚合物多元醇A和1,5‑萘二异氰酸酯反应制成。B组分包括聚合物多元醇B、扩链剂和催化剂，所述A组分和B组分的重量比为100：(20～60)。通过在所述A组分选用分子结构特殊的1，5‑萘二异氰酸酯，得到具有紧密硬段和良好微相分离的聚氨酯弹性体，用其制备的聚氨酯弹性体轨下垫板具有撕裂强度高，磨耗低，压缩永久变形低，动静刚度比低，耐疲劳性好的优点，可以提高轨下垫板的使用寿命。
NDI type polyurethane elastomer under-rail backing plate and preparation method thereof
一种NDI型聚氨酯弹性体轨下垫板及其制备方法
LING CHUN (author) / ZHAN PENGFEI (author) / LI YUNPENG (author) / LI PING (author) / CHEN YUCHAO (author) / YANG DONGXIAO (author) / JIA GUILIANG (author) / ZI WEINAN (author) / ZHOU XIN (author) / ZHOU YI (author)
2024-12-27
Patent
Electronic Resource
Chinese
IPC:
C08G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
E01B
PERMANENT WAY
,
Gleisoberbau
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