Halogen-free flame retardants for epoxy resin systems
Assignee3M Innovative Properties Company
InventorsRichard B. Ross, Yi He, Lisa S. Lim, Haohao Lin, Eumi Pyun
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Abstract
This disclosure relates to flame retardants that are useful for epoxy resin systems. Coating compositions and methods are provided the include an epoxy resin and a phosphate-containing flame retardant wherein the phosphate-containing flame retardant is selected from Group 1 metallic salts of a phosphate of a saccharide, Group 2 salts of a glycerophosphate, and Group 1 metallic salts of a polyphosphate. The provided flame retardants have low toxicity and are friendly to the environment.
Claims17
A coating composition comprising:
- an epoxy resin;
- and
- a phosphate-containing flame retardant, wherein the flame retardant has the formula:
- wherein A is selected from the group consisting of a conjugate base of glycerol, and a conjugate base of a saccharide or derivative of a saccharide, wherein n=0-5, wherein Q comprises manganese, wherein Q is a monovalent cation or a divalent cation, wherein when Q is a monovalent cation then m=n+2, and wherein when Q is a divalent cation then n=0 and m=1.
A coating composition comprising:
- an epoxy resin;
- and
- a phosphate-containing flame retardant,
- wherein the phosphate-containing flame retardant is selected from Group 1 metallic salts of a phosphate of a saccharide, and wherein the phosphate-containing flame retardant is a monosaccharide.
A coating composition comprising:
- an epoxy resin;
- and
- a phosphate-containing flame retardant,
- wherein the phosphate-containing flame retardant is selected from Group 1 metallic salts of a phosphate of a saccharide, wherein the flame retardant comprises D-glucose-1-phosphate disodium salt.
A method of making a coating composition comprising:
- providing an epoxy resin, and
- mixing in a phosphate-containing flame retardant
- wherein the phosphate-containing flame retardant is selected from Group 1 metallic salts of a phosphate of a saccharide, and wherein the phosphate-containing flame retardant is a monosaccharide.
Dependencies are inferred from the claim text.