A glue for soft PVC and its preparation method and application

CN117887405BActive Publication Date: 2026-08-28SHAOXING HONGRUN FIRE CONTROL EQUIP
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Patent Information

Application Number
CN202410136078.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-01-31
Publication Date
2026-08-28
Estimated Expiration
2044-01-31

AI Technical Summary

Technical Problem

[0008]本发明针对溶剂型软质PVC用胶水存在的活化温度较高，低温时因凝胶涂布不均不均的问题，提供一种新型的软PVC用聚氨酯胶水，粘接强度高、活化温度较低、低温柔顺性好，采用低浓度溶液即可实现快速PVC快速粘结

Benefits of technology

[0049]本发明中以油酸甲酯经磺化、水解制备改性聚酯，再以改性聚酯制备改性聚氨酯，得到的羟基脂肪酸改性聚酯具有优异的低温柔顺性，由于羟基脂肪酸主链中有7～8个CH2使得分子链柔性和结晶性，且含有7个或8个碳的烷基侧链，由于侧链空间位阻使得结晶速度减慢，可以使胶水的活化温度较低，更容易高速粘合；增粘剂过氯乙烯或高氯化聚乙烯由于本身分子结构和PVC相似并且因为含氯量比PVC高，强度也高于PVC可以增加胶水的初粘度，补偿了结晶速度变慢带来的初粘度的下降，新的得到的胶水在较低温度下能快速将PVC粘结起来，不易析出，不成凝胶，粘结效果良好。

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Abstract

The present application relates to the technical field of glue, and discloses a glue for soft PVC, a preparation method and application thereof.The glue comprises raw material components: a hydroxyl fatty acid ester modified polyurethane, a tackifier and a solvent; the structure of the hydroxyl fatty acid ester modified polyurethane is shown as formula III; the preparation method comprises the following steps: step 1, hydrolysis after addition reaction of methyl oleate and concentrated sulfuric acid to generate a sulfate; polycondensation reaction of the product, adipic acid and dihydric alcohol to obtain a hydroxyl fatty acid modified polyester shown as formula II; reaction with diisocyanate to obtain the hydroxyl fatty acid ester modified polyurethane shown as formula III; and mixing with the tackifier and the solvent to obtain the polyurethane glue for PVC; the glue has high bonding strength, low activation temperature and good low-temperature flexibility, and can realize fast PVC bonding by using a low-concentration solution.
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Citation Information

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