Patent GB-1121963-A (GB)
Title: New polyepoxy compounds, process for their preparation and their use
IPC: C08G59/26
Filed: 1966-03-21
Abstract: Curable mixtures comprise a polyepoxy compound of formula <FORM:1121963/C3/1> wherein R1- 8 each represent a monovalent substituent such as halogen, hydrogen, alkoxy or alkyl, and R1 + R5 may also represent an alkylene radical and Z represents an aliphatic or cycloaliphatic residue which contains at least one epoxide group and is free from nitrogen, with or without other epoxy compounds, in conjunction with a curing agent for epoxy resins.  Other polyepoxy compounds that may be present are polyglycidyl ethers of polyhydric alcohols, polyglycidyl esters of polycarboxylic acids, amino polyepoxy compounds, and alicyclic compounds containing epoxide groups. Preferred curing agents are polybasic carboxylic acids and their anhydrides and accelerators, diluents, fillers, plasticizers, pigments, dyestuffs, flame-inhibitors and mould lubricants may also be present.ALSO:Stabilizers for transformer and hydraulic oils comprise epoxy compounds of formula <FORM:1121963/C4-C5/1> wherein R1- 8 are monovalent substituents and R1 + R5 may form an alkylene group and Z is an aliphatic or cycloaliphatic residue containing 1 or more epoxy groups and is free from nitrogen.ALSO:Novel polyepoxy compounds of formula <FORM:1121963/C2/1> wherein R2- 8 are monovalent substituents such as halogen, hydrogen, alkoxy or alkyl, and R1+R5 may also be an alkylene group; Z is an aliphatic or cycloaliphatic residue which contains at least one epoxide group and is free from nitrogen, are prepared by reacting a compound of formula <FORM:1121963/C2/2> wherein Z1 is an aliphatic or cycloaliphatic residue which contains at least one epoxide group or "epoxidizable" group and is free from nitrogen, with an epoxidizing agent in a one or two stage process.  The "epoxidizable" group may be a C=C double bond or a halohydrin group and the latter may be converted to an epoxide group with a dehydrohalogenating agent.  Starting materials of Formula (IV) wherein Z1 is an unsaturated aliphatic or cycloaliphatic group may be prepared by (i) reaction of a tetrahydrophthalic anhydride derivative with an unsaturated aliphatic or cycloaliphatic amine, or (ii) reaction of an N-alkali metal derivative of a tetrahydrophthalimide derivative with an unsaturated aliphatic or cycloaliphatic halide.  Starting materials of Formula (IV) wherein Z1 is the group -CH2-CH(OH)-CH2(Hal) or -CH2-CH(Hal)-CH2(OH) (Hal=halogen atom) are prepared by reaction of an N-alkali metal derivative of a tetrahydrophthalimide derivative with a glycerine dihalohydrin.  Starting materials of Formula (IV) wherein Z1 is the group <FORM:1121963/C2/3> wherein x is a whole number and R is -H or alkyl are prepared by reaction of an N- alkali-metal compound of a tetrahydrophthalimide derivative with a compound of formula <FORM:1121963/C2/4> 1,2,3,6-Tetrahydrophthalimide sodium is prepared by reaction of 1,2,3,6-tetrahydrophthalimide with sodium in ethanol.ALSO:Aluminium sheets are coated with a composition comprising a compound of formula:- <FORM:1121963/B1-B2/1> wherein R1-8 are monovalent radicals and R1 + R5 may form an alkylene group, and Z is an aliphatic or cycloatiphatic residue containing 1 or more epoxide groups and is free from nitrogen, alone or with other epoxy compounds, in conjunction with a curing agent for epoxy resins.