(EP3156450) The present invention provides a curable resin composition having excellent fluidity and giving a cured product having excellent physical properties such as heat resistance, moisture resistance/solder resistance, flame retardance, and dielectric characteristics. The curable resin composition contains a resin (A) which has a benzoxazine structure represented by structural formula (A1) below and an epoxy resin (B) at such a ratio that when the total number of moles of the benzoxazine structure of the structural formula (A1) is ±, and the number of moles of epoxy groups in the epoxy resin (B) is ², a ratio [²/±] is 0.1 to 0.5.
(EP3156450) 1. A curable resin composition comprising a resin (A) which has a benzoxazine structure represented by structural formula (A1) below and an epoxy resin (B) at such a ratio that when the total number of moles of the benzoxazine structure represented by the structural formula (A1) is alpha , and the number of moles of epoxy groups in the epoxy resin (B) is beta , a ratio [(beta )/(alpha )] is 0.1 to 0.5, (see diagramm) [in the structural formula (A1), Ar **1 represents a tetravalent aromatic group, Ar **2 represents a divalent aromatic group, L represents a divalent linking group, x represents an average repeating number of 0.25 to 5.0, and O ***1 atom and C ***1 atom represent bonds to adjacent carbon atoms of an aromatic group represented by Ar **1, and O ***2 atom and C ***2 atom represent bonds to adjacent carbon atoms of an aromatic group represented by Ar **2]. 20. A resin (A) having a benzoxazine structure represented by a structural formula (A1) below, (see diagramm) [in the structural formula (A1), Ar **1 represents a tetravalent aromatic group, Ar **2 represents a divalent aromatic group, L represents a divalent linking group, x represents an average repeating number of 0.25 or more and less than 2.0, and O ***1 atom and C ***1 atom represent bonds to adjacent carbon atoms of an aromatic group represented by Ar **1, and O ***2 atom and C ***2 atom represent bonds to adjacent carbon atoms of an aromatic group represented by Ar **2].
(EP3156450) LEGAL DETAILS FOR EP3156450 Actual or expected expiration date=2035-02-19 Legal state=ALIVE Status=PENDING Event publication date=2015-02-19 Event code=EP/APP Event indicator=Pos Event type=Examination events Application details Application country=EP EP15805902 Application date=2015-02-19 Standardized application number=2015EP-0805902 Event publication date=2017-04-19 Event code=EP/A1 Event type=Examination events Application published with search report Publication country=EP Publication number=EP3156450 Publication stage Code=A1 Publication date=2017-04-19 Standardized publication number=EP3156450 Event publication date=2017-04-19 Event code=EP/17P Event indicator=Pos Event type=Examination events Request for examination filed Pruefungsantrag gestellt Effective date of the event=2016-12-02 Event publication date=2017-04-19 Event code=EP/AK Event indicator=Pos Event type=Designated states Designated contracting states: Benannte vertragsstaaten AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Event publication date=2017-04-19 Event code=EP/AX Event indicator=Pos Event type=Designated states Extension of the European patent to Request for extension of the european patent to BA ME
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