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Forming in-place gasket with tack free surface

一种无粘性、垫片的技术，应用在发动机的密封、合成树脂层状产品、运输和包装等方向，能够解决密封层过厚、垫片未被考虑等问题

Inactive Publication Date: 2015-03-18
DYMAX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

US6787225 and 6448302 disclose a radiation curable coating using wax, however, gaskets are not considered
US8400730 discloses a multi-stage gasket using multiple material types, but such a sealing layer is too thick

Method used

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  • Forming in-place gasket with tack free surface
  • Forming in-place gasket with tack free surface
  • Forming in-place gasket with tack free surface

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0024] The first step in preparing a tough, substantially non-adhesive gasket is to form a liquid composition comprising a radiation polymerizable mixture of:

[0025] a) from about 20% to about 85% by weight of a free radically polymerizable urethane-acrylate monomer, a free radically polymerizable urethane-methacrylate monomer, a free radically polymerizable amino group Formate-acrylate oligomers, free radically polymerizable urethane-methacrylate oligomers, or combinations thereof;

[0026] b) from about 5% to about 70% by weight of a free radically polymerizable diluent;

[0027] c) a free radical polymerization photoinitiator of about 1 wt % to about 6 wt %;

[0028] d) about 4% to about 30% by weight of a wax;

[0029] e) about 2wt% - about 13wt% of a thixotropic agent;

[0030] f) about 0 wt% to about 10 wt% of an adhesion promoter; and

[0031] g) from about 0% to about 1% by weight of a colorant.

[0032] For the purposes of the present invention, the term substa...

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Abstract

A method of preparing a flexible, substantially tack free gasket by forming a liquid composition which is a radiation polymerizable admixture of a free radical polymerizable urethane (meth)acrylate monomer, free radical polymerizable urethane (meth)acrylate oligomer, or combinations thereof; a free radical polymerizable diluent; a free radical polymerization photoinitiator; a wax; a thixotropic agent; and optionally an adhesion promoter and a colorant. The composition is distributed onto a substrate and then exposed to actinic radiation to cure the liquid composition into a flexible, substantially tack free gasket having a Shore A hardness of from about A20 to about A80.

Description

technical field [0001] The present invention relates to a gasket, and more particularly to a gasket formed on a substrate and having a substantially tack-free surface after curing. This applies in the production of electronic devices, for example as enclosures for glass, plastic and metal housings. Background technique [0002] There is enormous commercial value in making electronic devices such as electronic circuits surrounded by a sealable housing. Usually this is a perimeter gasket sandwiched between the shell layers to prevent contamination from entering the device shell. Typical electronic devices include handheld cellular phones, pagers, global positioning systems, personal digital assistants, and the like. They enclose delicate displays, electronic circuits, and similar components that are easily damaged during everyday use. In fact, if debris, such as dust particles, enters the device through gaps between adjacent housing layers, the electronic circuits in the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/28C08F290/06C08F220/10C08F220/56C08K3/36
CPCC09D175/14Y10T428/31551C08L75/16F16J15/102C08L75/14B32B27/40F16J15/14C08L33/14C08G18/4854C08G18/672C09D175/16C08G18/48
Inventor 艾谢居尔·卡斯卡坦·南白奥格卢马鲁夫·拉希姆
Owner DYMAX