Curable dielectric polyphenylene ether-polyepoxide compositions
First Claim
Patent Images
1. A curable article comprising a fibrous substrate impregnated with a composition free from hardeners for epoxy resins, containing about 5-15% chemically combined bromine and consisting essentially of:
- (I) about 30-60% of at least one polyphenylene ether having a number average molecular weight in the range of about 3,000-15,000, said polyphenylene ether consisting essentially of structural units having the formula ##STR8## wherein in each of said units independently, each Q1 is independently halogen, primary or secondary lower alkyl, phenyl, haloalkyl, aminoalkyl, hyrocarbonoxy, or halohydrocarbonoxy wherein at least two carbon atoms separate the halogen and oxygen atoms; and
each Q2 is independently hydrogen, halogen, primary or secondary lower alkyl, phenyl, haloalkyl, hydrocarbonoxy or halohydrocarbonoxy as defined for Q1 ;
(II) about 30-60% of at least one of;
(A) polyepoxide compositions comprising at least one bisphenol polyglycidly ether having an average of at most one aliphatic hydroxy group per molecule or a mixture comprising said bisphenol polyglycidyl ether and at least one bisphenol, said composition containing about 10-30% bromine as aryl substituents; and
(B) partial condensation products of said polyepoxide compositions;
(III) a catalytically effective amount of at least one of imidazoles and arylene polyamines; and
(IV) about 0.2-1.0% of zinc in the form of a salt which is soluble or stably dispersible in said curable composition;
all percentages being by weight and based on total curable composition.
9 Assignments
0 Petitions
Accused Products
Abstract
Curable compositions contain a low molecular weight polyphenylene ether and a polyepoxide composition containing brominated and non-brominated bisphenol polyglycidyl ethers, in combination with further components including specific catalysts. Said compositions are preferably free from hardeners for epoxy resins. They may be used in the preparation of bonding sheets which are useful in the manufacture of multilayer printed circuit assemblies and which have excellent physical and electrical properties.
79 Citations
15 Claims
-
1. A curable article comprising a fibrous substrate impregnated with a composition free from hardeners for epoxy resins, containing about 5-15% chemically combined bromine and consisting essentially of:
-
(I) about 30-60% of at least one polyphenylene ether having a number average molecular weight in the range of about 3,000-15,000, said polyphenylene ether consisting essentially of structural units having the formula ##STR8## wherein in each of said units independently, each Q1 is independently halogen, primary or secondary lower alkyl, phenyl, haloalkyl, aminoalkyl, hyrocarbonoxy, or halohydrocarbonoxy wherein at least two carbon atoms separate the halogen and oxygen atoms; and
each Q2 is independently hydrogen, halogen, primary or secondary lower alkyl, phenyl, haloalkyl, hydrocarbonoxy or halohydrocarbonoxy as defined for Q1 ;(II) about 30-60% of at least one of; (A) polyepoxide compositions comprising at least one bisphenol polyglycidly ether having an average of at most one aliphatic hydroxy group per molecule or a mixture comprising said bisphenol polyglycidyl ether and at least one bisphenol, said composition containing about 10-30% bromine as aryl substituents; and (B) partial condensation products of said polyepoxide compositions; (III) a catalytically effective amount of at least one of imidazoles and arylene polyamines; and (IV) about 0.2-1.0% of zinc in the form of a salt which is soluble or stably dispersible in said curable composition; all percentages being by weight and based on total curable composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 12, 13, 15)
-
-
9. A curable article comprising a fibrous substrate impregnated with a composition free from hardeners for epoxy resins, containing about 5-15% chemically combined bromine and consisting essentially of:
-
(I) about 30-60% of at least one polyphenylene ether having a number average molecular weight in the range of about 3,000-15,000, said polyphenylene ether consisting essentially of structural units having the formula ##STR11## wherein in each of said units independently, each Q1 is independently halogen, primary or secondary lower alkyl, phenyl, haloalkyl, aminoalkyl, hydrocarbonoxy, or halohydrocarbonoxy wherein at least two carbon atoms separate the halogen and oxygen atoms; and
each Q2 is independently hydrogen, halogen, primary or secondary lower alkyl, phenyl, haloalkyl, hydorcarbonoxy or halohydrocarbonoxy as defined for Q1 ;(II) about 30-60% of at least one of; (A) polyepoxide compositions comprising at least one bisphenol polyglycidyl ether having an average of at most one aliphatic hydroxy group per molecule or a mixture comprising said bisphenol polyglycidy ether and at least one bisphenol, said composition containing about 10-30% bromine as aryl substituents; and (B) partial condensation products of said polyepoxide compositions; (III) a catalytically effective amount of at least one of imidazoles and arylene polyamines; and (IV) about 0.2-1.0% of zinc in the form of a salt which is soluble or stably dispersible in said curable composition; all percentages being by weight and based on the total curable composition; said composition also containing at least one aliphatic tris(dialkylphosphato)titanate of the formula ##STR12## wherein R3 is C2-6 primary or secondary alkyl or alkenyl, R4 is C1-3 alkylene, R5 is C1-5 primary or secondary alkyl, R6 is C5-12 primary or secondary alkyl and x is from 0 to about 3, in the amount of about 0.1-1.0 part by weight per 100 parts of the resinous composition. - View Dependent Claims (10)
-
-
11. A curable article comprising a fibrous substrate impregnated with a composition free from hardeners for epoxy resins, containing about 5-15% chemically combined bromine and consisting essentially of:
-
(I) about 30-60% of at least one polypehnylene ether having a number average molecular weight in the range of about 3,000-15,000, said polyphenylene ether consisting essentially of structural units having the formula ##STR13## wherein in each of said units independently, each Q1 is independently halogen, primary or secondary lower alkyl, phenyl, haloalkyl, aminoalkyl, hydrocarbonoxy, or halohydrocarbonoxy wherein at least two carbon atoms separate the halogen and oxygen atoms; and
each Q2 is independently hydrogen, halogen, primary or secondary lower alkyl, phenyl, haloalkyl, hydrocarbonoxy or halohydrocarbonoxy as defined for Q1 ;(II) about 30-60% of at least one of; (A) polyepoxide compositions comprising at least one bisphenol polyglycidyl ether having an average of at most one aliphatic hydroxy group per molecule or a mixture comprising said bisphenol polyglycidyl ether and at least one bisphenol, said composition containing about 10-30% bromine as aryl substituents; and (B) partial condensation products of said polyepoxide compositions; (III) a catalytically effective amount of at least one of imidazoles and arylene polyamines; and (IV) about 0.2-1.0% of zinc in the form of a salt which is soluble or stably dispersible in said curable composition; all percentages being by weight and based on the total curable composition; said composition also containing up to about 5 parts, per 100 parts of components I-IV, of antimony pentoxide stably dispersed therein.
-
-
14. A multilayer circuit assembly comprising at least two printed circuit boards separated by a cured composition prepared by the application of heat and pressure to the article of claim 32.
Specification