Curable epoxy composition and its use in prepregs and core filling

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12247121
APP PUB NO 20220153988A1
SERIAL NO

17437479

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A curable composition comprising: i) a glycidyl ether of a novolac, comprising or consisting of moieties having the formula (I), wherein —Ra is either always hydrogen or always methyl; —B is either always *—CH2-** or always formula (A); —a fraction of 0.8 to 0.99 of the Y moieties are essentially —O-glycidyl, this fraction being designated as x, and the remainder of the Y moieties, this fraction being designated as (1-x), are divalent bridging spacers of the structure *—O—CH2—CH(OH)—CH2—O—** connecting two moieties according to above formula (I); and—n is a number in the range of 0.1 to 3.0; and wherein said novolac glycidyl ether has an epoxy equivalent weight FEW in the range of 160 to 270 g/eq. and the average number of epoxy groups per molecule of novolac glycidyl ether (I), designated as f, is in the range of 2.1 to 5.0; ii) dicyandiamide; and iii) an urea derivative of the formula (II). This composition is stable upon storage at room temperature and fire-retardant. It can be used for preparation of prepregs and in core filling, particularly in the aerospace field.

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Patent Owner(s)

  • VON ROLL SCHWEIZ AG

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Mullot, Nicolas Uffheim, FR 2 1
Rudin, Markus Frenkendorf, CH 5 31
Simon, Hubert Buhl, FR 17 219

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