Esterified acids for use in polymeric materials
The present teachings contemplate a method that includes a step of providing a first amount of esterified reaction product of an acid and an epoxy-based material. The esterified reaction product may be further reacted an epoxy resin to form a polymeric epoxy. The resulting material may have a generally linear backbone, foaming and curing capability and flame retardant properties.
1. A two component system for creating a foamed material of a polymeric epoxy, the two component system comprising:
a first component comprising at least one epoxy resin and at least one blowing agent; and
a second component comprising at least one esterified reaction product formed by reacting a phosphoric acid and an epoxide;
wherein the at least one esterified reaction product of the second component has a first viscosity that is higher than the viscosity of the phosphoric acid;
wherein the at least one epoxy resin of the first component has a second viscosity and is suitable for reaction with the at least one esterified reaction product;
wherein the amount of the at least one esterified reaction product in the second component and the amount of the at least one epoxy resin in the first component are sufficient to produce the polymeric epoxy, wherein the polymeric epoxy includes at least one phosphorus atom and has a weight average molecular weight of at least about 10,000 daltons; and
wherein the foamed material resulting from combining and reacting the first and second components has flame retardant properties and is suitable for cavity filling, cavity reinforcement, acoustic modification, and adhesive bonding.
2. The two component system of claim 1 , wherein the foamed material resulting from combining and reacting the first and second components exhibits sufficient flame retardancy to meet vertical burn and smoke density requirements as set forth in 14 C.F.R. § 25.853 and 14 C.F.R. § 25.856 (the United States Code of Federal Regulations for compartment interiors).
3. The two component system of claim 1 , wherein the at least one blowing agent of the first component comprises an inorganic compound capable of decomposing to yield a gas.
4. The two component system of claim 3 , wherein the inorganic compound capable of decomposing to yield a gas is a carbonate.
5. The two component system of claim 3 , wherein the inorganic compound capable of decomposing to yield a gas contains one or more of calcium, silicon, sodium, or some other alkali metal or alkali earth metal.
6. The two component system of claim 1 , wherein the epoxide used to form the at least one esterified reaction product of the second component is a liquid epoxy resin.
7. The two component system of claim 1 , which does not contain any additional curing agent.
8. The two component system of claim 1 , wherein the at least one blowing agent of the first component comprises a physical blowing agent and/or a chemical blowing agent.
9. The two component system of claim 1 , wherein the at least one blowing agent of the first component does not require an addition of a stimulus.
10. The two component system of claim 1 , wherein the at least one blowing agent of the first component requires exposure to elevated temperatures.
11. A foamed material resulting from combining and reacting the first and second components of the two component system of claim 1 .
12. The two component system of claim 1 , wherein the at least one esterified reaction product of the second component includes a plurality of monoesters and diesters, wherein the diesters are present in an amount of less than 25% of the amount of monoesters as measured by NMR.
13. A foamed material resulting from combining and reacting the first and second components of the two component system of claim 12 .
14. The two component system of claim 1 , wherein the amount of the at least one esterified reaction product in the second component and the amount of the at least one epoxy resin in the first component are sufficient to produce the polymeric epoxy, wherein the polymeric epoxy includes at least one phosphorus atom and has a weight average molecular weight of at least about 15,000 daltons.
15. A foamed material resulting from combining and reacting the first and second components of the two component system of claim 14 .
16. The two component system of claim 1 , wherein the amount of the at least one esterified reaction product in the second component and the amount of the at least one epoxy resin in the first component are sufficient to produce the polymeric epoxy, wherein the polymeric epoxy includes at least one phosphorus atom and has a weight average molecular weight of at least about 20,000 daltons.
17. A foamed material resulting from combining and reacting the first and second components of the two component system of claim 16 .