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Foamed Thermoset and Thermoplastic Polymer Combinations

IP.com Disclosure Number: IPCOM000094027D
Original Publication Date: 1966-May-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

McDermott, CJ: AUTHOR

Abstract

A series of foamed products are polyethylene/silicone foams, polyethylene/epoxy foams, and polyethylene/phenolic foams.

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Foamed Thermoset and Thermoplastic Polymer Combinations

A series of foamed products are polyethylene/silicone foams, polyethylene/epoxy foams, and polyethylene/phenolic foams.

The products can be prepared by alternate processes. In one process. The thermoset comprises the major portion of the foamed system, and the thermoplastic employed has a melting point lower than the blowing and curing temperatures of the thermoset.

In an alternate process, the thermoplastic and thermoset can be combined in a wide range of proportions in which the thermoset can constitute from 10 to 90 wt. go of the combination. Also the thermoplastic has a melting point higher than the blowing and curing temperature of the thermoset. The thermoplastic is employed as a filler in the foamed thermoset.

Typical thermosets include various silicones, epoxies, phenolics and the like and the various thermoplastics which can be used include polyethylene, polyprophlene, polycarbonamide (e.g. nylonl, polyesters and the like.

In general, the steps of each alternate process normally comprise incorporating blowing and curing agents in the thermoset, dispersing a thermoplastic in the thermoset, and foaming and curing the resultant mixture under conditions normally employed for thermosets.

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