Photocurable form-in-place gasket for electronic applications
Assignee3M Innovative Properties Company
InventorsMitchell Huang, Michael A. Kropp
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Abstract
Photocurable compositions and process for providing form-in-place gaskets using automated placement followed by photocuring of a pattern of a non-silicone composition comprising a liquid polyolefin oligomer, a reactive diluent, and a curative. The form-in-place gasket, after curing, has a level of total outgassing components of about 10 μg/g to about 45 μg/g. The curative responds to actinic radiation and heat, and may contain a photoinitiator. Optionally a photocurable, form-in-place gasket according to the present invention further comprises a thixotropic filler in an amount from about 8.0 wt. % to about 12.0 wt. %, and preferably comprises a fumed silica.
Claims18
A form-in-place gasket produced using automated placement followed by photocuring of a pattern of a thixotropic non-silicone composition comprising:
- a liquid polyolefin oligomer;
- a reactive diluent;
- and
- a curative, said form-in-place gasket, after curing, having level of outgassing components of about 10 μg/g to about 45 μg/g.
A photocurable, non-silicone composition for form-in-place gaskets comprising:
- a liquid polyolefin oligomer;
- a reactive diluent;
- and
- a curative, said non-silicone composition, after curing, having a level of outgassing components of about 10 μg/g to about 45 μg/g.
A process for forming a cured form-in-place gasket having a total level of outgassing components of about 10 μg/g to about 45 μg/g, said process comprising the steps of:
- providing a photocurable, non-silicone composition comprising a liquid polyolefin oligomer, a reactive diluent and a curative responsive to actinic radiation;
- dispensing said photocurable composition as a form-in-place gasket bead;
- exposing said gasket bead to actinic radiation;
- and
- heating said gasket bead to a temperature to cure said gasket bead and substantially displace any volatile components therefrom to produce said cured form-in-place gasket.
Dependencies are inferred from the claim text.