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US 8,541,516 B2Granted
Phosphorus-containing compounds useful for making halogen-free, ignition-resistant polymers
AssigneeDow Global Technologies LLC
InventorJoseph Gan
Life of this patent
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Abstract
Phosphorus-containing compounds useful for flame retardant epoxy resins are disclosed. The flame retardant epoxy resins may be used to make electrical laminates. This invention is particularly useful in end use applications in which a low bromine or low halogen content is required or desired.
Claims6
A process for making a curable phosphorus-containing, benzoxazine ring-containing resin composition comprising blending:
- (1) a benzoxazine ring-containing compound comprising the reaction product of:
- (I) a phosphorus-containing compound comprising the reaction product of:
- (A) at least one organophosphorus compound having a group selected from the group H—P═O, the group P—H, and the group P—OH;
- and
- (B) at least one compound having the following Formula (V):
- wherein
- R1 each independently is hydrogen or an alkyl group having from 1 to 10 carbon atoms;
- Y is a functional group selected from hydroxy, or amine;
- X is a hydrocarbylene group;
- R″ is a hydrocarbyl group having from 1 to 8 carbon atoms;
- p each independently represents a number from 1 to 4;
- and
- a and b each independently represent a number equal to or greater than zero
- (II) an amine compound when the Y functional group of Component (B) is hydroxyl, or a hydroxyl group-containing compound with the Y functional group is an amine;
- and
- (III) an aldehyde compound;
- and
- (2) a thermosetting composition.
15 more elements
Dependencies are inferred from the claim text.