Foamable resin composition for controlling loss circulation
This disclosure relates to a foamable resin composition containing a nitrogen gas-generating compound and methods of using the composition for loss circulation control.
1. A foamable resin composition, comprising:
an epoxy resin selected from a bisphenol-A-(epichlorohydrin) epoxy resin with oxirane mono [(C 12 -C 14 alkyloxy)methyl] derivatives and a bisphenol-A-(epichlorohydrin) epoxy resin with 1,6-hexanediol diglycidyl ether in an amount of about 75% to about 85% by weight of the composition;
a nitrogen gas-generating compound in an amount of about 5% to about 15% by weight of the composition;
a hydroxysultaine surfactant in an amount of about 1% to about 5% by weight of the composition; and
a curing agent in an amount of about 10% to about 13% by weight of the composition.
2. The composition of claim 1 , wherein the epoxy resin is about 77% to about 78% by weight of the composition.
3. The composition of claim 1 , wherein the nitrogen gas-generating compound is an azo compound.
4. The composition of claim 3 , wherein the azo compound is azodicarbonamide.
5. The composition of claim 1 , wherein the nitrogen gas-generating compound is about 7% to about 8% by weight of the composition.
6. The composition of claim 1 , wherein the surfactant is cocamidopropyl hydroxysultaine.
7. The composition of claim 1 , wherein the surfactant is about 2% to about 3% by weight of the composition.
8. The composition of claim 1 , wherein the weight ratio of the nitrogen gas-generating compound to the surfactant is about 3:1.
9. The composition of claim 1 , wherein the curing agent is a linear ethylene amine containing two primary nitrogens and one secondary nitrogen.
10. The composition of claim 9 , wherein the curing agent is diethylenetriamine (DETA).
11. A foamable resin composition, comprising:
a bisphenol-A-(epichlorohydrin) epoxy resin selected from a bisphenol-A-(epichlorohydrin) epoxy resin with oxirane mono [(C 12 -C 14 alkyloxy)methyl] derivatives and a bisphenol-A-(epichlorohydrin) epoxy resin with 1,6-hexanediol diglycidyl ether in an amount of about 75% to about 85% by weight of the composition;
azodicarbonamide in an amount of about 5% to about 10% by weight of the composition;
a hydroxysultaine surfactant in an amount of about 1% to about 5% by weight of the composition; and
a curing agent in an amount of about 10% to about 13% by weight of the composition.
12. The foamable resin composition of claim 11 , wherein the surfactant is cocamidopropyl hydroxysultaine.