Glycidyl ether of novolak type substituted phenolic resin, process for producing the same, and encapsulating compound composed mainly of the same

Claim 2

A glycidyl ether of novolak type substituted phenolic resin having 1 to 40 repeating units on the number-average which comprises a substantially linear polymer composed of the repeating units represented by the formula (I): ##STR9## substantially all the terminals of the moleculer chains of said polymer being modified with a group represented by the formula (II): ##STR10## wherein R 1 , R 2 , R 3 and R 4 , which may be the same or different, are members selected from the group consisting of hydrogen atom, alkyl groups having 1 to 8 carbon atoms, aromatic group, and halogen atom; R 5 , R 6 and R 7 , which may be the same or different, are members selected from the group consisting of alkyl groups having 1 to 10 carbon atoms, aromatic group, aryl group, and halogen atom; and R 8 is a member selected from the group consisting of hydrogen atom and alkyl groups having 1 to 4 carbon atoms.

Claim 3

A glycidyl ether of novolak type substituted phenolic resin as recited in claim 1, wherein R 1 , R 2 , R 3 and R 4 , which may be the same or different, are members selected from the group consisting of hydrogen atom, methyl group, and halogen atom.

Claim 4

A glycidyl ether of novolak type substituted phenolic resin as recited in claim 1, wherein R 5 , R 6 and R 7 , which may be the same or different, are members selected from the group consisting of methyl group, butyl group, phenyl group, and halogen atom.

Claim 5

A glycidyl ether of novolak type substituted phenolic resin as recited in claim 1, wherein R 8 is a hydrogen atom.

Claim 6

A glycidyl ether of novolak type substituted phenolic resin as recited in claim 1, wherein R 1 , R 2 , R 3 and R 4 are hydrogen atoms.

Claim 7

A glycidyl ether of novolak type substituted phenolic resin as recited in claim 1, wherein R 5 , R 6 and R 7 , which may be the same or different, are members selected from the group consisting of methyl group and butyl group.

Claim 8

A glycidyl ether of novolak type substituted phenolic resin as recited in claim 1, wherein the number of the repeating units is 2 to 20 on the number-average.

Claim 9

A process for producing a glycidyl ether of novalak type substituted phenolic resin which comprises polycondensing 30 to 95 mol% of at least one difunctional phenol component represented by the formula (III): ##STR11## and 5 to 70 mol% of at least one monofunctional phenol represented by the formula (IV): ##STR12## with an aldehyde represented by the formula (V): R.sub.8 CHO (V) wherein R 1 , R 2 , R 3 and R 4 , which may be the same or different, as members selected from the group consisting of hydrogen atom, alkyl groups having 1 to 8 carbon atoms, aromatic group, and halogen atom; R 5 , R 6 and R 7 , which may be the same or different, are members selected from the group consisting of alkyl groups having 1 to 10 carbon atoms, aromatic group, aryl group, and halogen atom; and R 8 is a member selected from the group consisting of hydrogen atom and alkyl groups having 1 to 4 carbon atoms to form a novolak type substituted phenolic resin and subsequently glycidyl etherifying the resin with an epihalohydrin.

Claim 10

A process for producing a glycidyl ether of novalak type substituted phenolic resin which comprises polycondensing 30 to 95 mol% of at least one difunctional phenol component represented by the formula (III): ##STR11## and 5 to 70 mol% of at least one monofunctional phenol represented by the formula (IV): ##STR12## with an aldehyde represented by the formula (V): R.sub.8 CHO (V) wherein R 1 , R 2 , R 3 and R 4 , which may be the same or different, as members selected from the group consisting of hydrogen atom, alkyl groups having 1 to 8 carbon atoms, aromatic group, and halogen atom; R 5 , R 6 and R 7 , which may be the same or different, are members selected from the group consisting of alkyl groups having 1 to 10 carbon atoms, aromatic group, aryl group, and halogen atom; and R 8 is a member selected from the group consisting of hydrogen atom and alkyl groups having 1 to 4 carbon atoms to form a novolak type substituted phenolic resin and subsequently glycidyl etherifying the resin with an epihalohydrin.

Claim 11

A process as recited in claim 8, wherein the epihalohydrin is epichlorohydrin.

Claim 12

A process as recited in claim 8, wherein the difunctional phenol is p-propenylphenol, o-benzylphenol, 6-n-amyl-m-cresol, o-cresol, p-cresol, o-ethylphenol, p-ethylphenol, o-phenylphenol, p-phenylphenol, p-t-pentylphenol, p-t-butylphenol, o-chlorophenol, 4-chloro-3,5-xylenol, o-allylphenol, nonylphenol, or o-bromophenol.

Claim 13

A process as recited in claim 8, wherein the monofunctional phenol is 2-t-butyl-4-methylphenol, 2,4-xylenol, 2,6-xylenol, 2,4-dichlorophenol, 2,4-dibromophenol, dichloroxylenol, dibromoxylenol, 2,4,5-trichlorophenol, or 6-phenyl-2-chlorophenol.

Claim 14

A process as recited in claim 8, wherein the aldehyde is formaldehyde, paraformaldehyde, polyoxymethylene, or glyoxal.

Claim 15

A process as recited in claim 8, wherein the novolak type substituted phenol as recited in claim 8 is glycidyl etherified with an epihalohydrin in the presence of a cyclic or linear ether compound.

Claim 16

A process as recited in claim 13, wherein the cyclic or linear ether compound is dioxane or diethoxyethane.

Claim 17

An encapsulating compound comprising a glycidyl ether of novolak type substituted phenolic resin having 1 to 40 repeating units on the number-average which comprises a substantially linear polymer composed of the repeating units represented by the formula (I): ##STR13## substantially all the terminals of the molecular chains of said polymer being modified with a group represented by the formula (II): ##STR14## wherein R 1 , R 2 , R 3 and R 4 , which may be the same or different, are members selected from the group consisting of hydrogen atom, alkyl groups having 1 to 8 carbon atoms, aromatic group, and halogen atom; R 5 , R 6 and R 7 , which may be the same or different, are members selected from the group consisting of alkyl groups having 1 to 10 carbon atoms, aromatic group, aryl group, and halogen atom; and R 8 is a member selected from the group consisting of hydrogen atom and alkyl groups having 1 to 4 carbon atoms.

Claim 18

An encapsulating compound comprising a glycidyl ether of novolak type substituted phenolic resin having 1 to 40 repeating units on the number-average which comprises a substantially linear polymer composed of the repeating units represented by the formula (I): ##STR13## substantially all the terminals of the molecular chains of said polymer being modified with a group represented by the formula (II): ##STR14## wherein R 1 , R 2 , R 3 and R 4 , which may be the same or different, are members selected from the group consisting of hydrogen atom, alkyl groups having 1 to 8 carbon atoms, aromatic group, and halogen atom; R 5 , R 6 and R 7 , which may be the same or different, are members selected from the group consisting of alkyl groups having 1 to 10 carbon atoms, aromatic group, aryl group, and halogen atom; and R 8 is a member selected from the group consisting of hydrogen atom and alkyl groups having 1 to 4 carbon atoms.