High nitrogen containing triazine-phenol-aldehyde condensate

A flame-retardant epoxy resin composition comprising:

• (A) an epoxy resin;
• (B) a triazine-phenol-aldehyde condensate, said condensate being substantially free of water and having from about 15% to 24% nitrogen, not more than 2% of free phenol, a melt viscosity of not more than 2,000 cps at 175° C. and a solubility of at least 80% by a 90:10, by weight, methanol:water method at 25° C. wherein the triazine is a member selected from the group consisting of:
• (a) melamine;
• (b) a mixture of at least 50% melamine and from about 0.5% to not more than about 50% benzoguanamine;
• (c) a mixture of at least 50% melamine and from about 0.5% to not more than about 50% acetoguanamine;
• and (d) a mixture of at least 50% melamine and not more than 35% each of benzoguanamine and acetoguanamine, all of said percentages being by weight;
• and
• (C) a curing accelerator.

A glycidylated triazine-phenol-aldehyde condensate, said condensate prior to glycidylation, being substantially free of water and having from about 15% to 24% of nitrogen, not more than about 2% of free phenol, a melt viscosity of not more than 2,000 cps at 175° C. and a solubility of at least 80% by a 90:10, by weight, methanol:water solvent method at 25° C. wherein the triazine is a member selected from the group consisting of:

• (a) melamine;
• (b) a mixture of at least 50% melamine and from about 0.5% to not more than about 50% benzoguanamine;
• (c) a mixture of at least 50% melamine and from about 0.5% to not more than about 50% acetoguanamine;
• and (d) a mixture of at least 50% melamine and not more than 35% each of benzoguanamine and acetoguanamine, all of said percentages being by weight.

A composition suitable for electronic applications comprising an epoxy resin wherein for each 100 parts of epoxy resin the composition contains:

• (a) about 0-30 parts of a phenolic-formaldehyde novolac;
• (b) optionally an epoxy curing accelerator;
• and
• (c) about 30 to 60 parts of a triazine-phenol-aldehyde condensation product, said condensation product being substantially free of water and having from about 15% to 24% nitrogen, a melt viscosity of not more than about 2,000 cps at 175° C., not more than 2% of free phenol and a solubility of at least 80% by a 90:10, by weight, methanol:water solvent method at 25° C. wherein the triazine is a member selected from the group consisting of:
• (a) melamine;
• (b) a mixture of at least 50% melamine and from about 0.5% to not more than about 50% benzoguanamine;
• (c) a mixture of at least 50% melamine and from about 0.5% to not more than about 50% acetoguanamine;
• and (d) a mixture of at least 50% melamine and not more than 35% each of benzoguanamine and acetoguanamine, all of said parts and percentages being by weight.

A flame-retardant epoxy resin composition comprising:

• (A) an epoxy resin;
• (B) a triazine-phenol-aldehyde condensate, said condensate being substantially free of water and having from about 15% to 24% nitrogen, not more than 2% of free phenol, a melt viscosity of not more than 2,000 cps at 175° C. and a solubility of least 80% by a 90:10, by weight, methanol:water method at 25° C. wherein the triazine is a member selected from-the group consisting of:
• (a) melamine;
• (b) a mixture of at least 50% melamine and from about 0.5% to not more than about 50% benzoguanamine;
• (c) a mixture of at least 50% melamine and from about 0.5% to not more than about 50% acetoguanamine;
• and (d) a mixture of at least 50% melamine and not more than 35% each of benzoguanamine and acetoguanamine, all of said percentages being by weight;
• (C) a curing accelerator;
• and
• (D) a phenolic-formaldehyde novolac a curing agent.

A flame-retardant epoxy resin composition comprising:

• (A) an epoxy resin;
• (B) a triazine-phenol-aldehyde condensate, said condensate being substantially free of water and having from about 15% to 24% nitrogen, not more than 2% of free phenol, a melt viscosity of not more than 2,000 cps at 175° C. and at least 80% solubility in a water and methanol mixture at 25° C., wherein said mixture has a weight ratio of 90:10 of methanol:water wherein the triazine is a member selected from the group consisting of:
• (a) melamine;
• (b) a mixture of at least 50% melamine and from about 0.5% to not more than about 50% benzoguanamine;
• (c) a mixture of at least 50% melamine and from about 0.5% to not more than about 50% acetoguanamine;
• and (d) a mixture of at least 50% melamine and not more than 35% each of benzoguanamine and acetoguanamine, all of said percentages being by weight;
• (C) a curing accelerator;
• and
• (D) a member selected from the group consisting of benzoguanamine, acetoguanamine and mixtures thereof in a quantity of about 0.5% to 20% by weight of the condensate.