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Polyurethane based switchable adhesives

一种粘合剂、组合物的技术，应用在聚脲/聚氨酯粘合剂、粘合剂类型、胶粘剂等方向，能够解决污染、不足以重复使用、粘合性医疗产品不能被再次使用等问题，达到疼痛改善的效果

Active Publication Date: 2017-12-01
LUMINA ADHESIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can be inconvenient and / or wasteful because if the adhesive medical product is applied in an incorrect location, it can only be removed after switching the adhesive to its non-adhesive or low-adhesive state
If removed without switching the adhesive, it is painful for the patient and in any case the adhesive medical product cannot be reused as the adhesive layer will be destroyed by the patient's skin cells and / or or hair contamination, it will not be enough to reuse

Method used

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  • Polyurethane based switchable adhesives
  • Polyurethane based switchable adhesives
  • Polyurethane based switchable adhesives

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] Polyol Specifications

[0036] Preferably, the polyol is polyether polyol or polyester polyol.

[0037] Preferably, the weight average molecular weight of the polyol is in the range of 2000 Daltons to 20,000 Daltons.

[0038] Preferably, the polyol has three or more hydroxyl functional groups. Most preferably, the polyol has an average of more than three and less than six hydroxyl functional groups. Examples thereof are ethoxylated or propoxylated substances of ethylene glycol, propylene glycol, butylene glycol, glycerol, trimethylolpropane pentaerythritol, dextrose or sorbitol (optionally, from cyclic A mixture of ethylene oxide and propylene oxide polymerized randomly or sequentially during the reaction), and diethers and triethers as the foregoing.

[0039] For medical applications, i.e. for adhesive medical products intended to come into contact with the skin, it is selected to have the desired rheology, water vapor transmission rate (MVTR), adhesion and biophase...

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PUM

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Abstract

The invention discloses polyurethane based switchable adhesives. Switchable adhesive compositions are disclosed comprising an adhesive component, which is formed from a material or materials capable of undergoing cross-linking with isocyanale other than by free radical polymerisation and at least one isocyanate having an average of more than one isocyanate functions, unsaturated curable molecules mixed in or partially bound in with the adhesive component, or unsaturated curable moieties fully bound in to the material or materials capable of undergoing cross-linking with isocyanate, and a photoinitiator. The adhesive composition forms a tacky gel-like pressure sensitive adhesive that is capable of moulding to a substrate, and upon activation of the photoinitiator the curable molecules or moieties cross-link to form a dense 3-dimensional network through the adhesive component which causes the composition to become less tacky and to form an elastic film with reduced peel strength.

Description

technical field [0001] The present invention relates to adhesive compositions, and more particularly, to polyurethane-based pressure-sensitive adhesive compositions that are "switchable" from a tacky state to a non-tacky or low-tacky state such that the switched tack Compounds have reduced peel strength. The invention also relates to methods of producing such switchable adhesive compositions and to articles comprising such switchable adhesive compositions. The present invention also relates to methods of using adhesive medical products for the treatment of patients with lesions or long-term medical conditions requiring repeated application of dressings, and to patients undergoing surgery, or for post-surgery and / or lesions that require skin coverage Patients and methods of patient management for skin closure applications. [0002] For convenience, the term "switchable" will be used to refer to an adhesive composition that can be changed from a tacky to a non-tacky state, or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/81C08G18/79C08G18/62C08G18/48C08G18/10C09J175/04
CPCC08G18/10C08G18/4829C08G18/6229C08G18/792C08G18/8116C09J175/04C08G18/48C08F290/067A61P17/02A61P31/04A61B46/20A61B2046/205A61F13/0206A61F13/0253C08G18/244C08G18/73C09J175/08
Inventor M·图纽斯
Owner LUMINA ADHESIVES
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