Preparation of degradable polyester composites and use thereof
View Patent ↗The polyester based polymer composition includes a polyester, a metal oxide, and a metal hydroxide. The polymer composites contains the metal oxide and a metal hydroxide made from melting blending has good mechanical property as well as greater degradability after a required time in the higher temperatures and moisture of downhole conditions. The reinforced polymer composites with glass fibers, and the metal oxide and metal hydroxide made from melting blending has higher mechanical property as well as greater degradability after a required time in the higher temperatures and moisture of downhole conditions. The polymer composites made from melting blending have the required mechanical properties and the degradability so that the polymer composites can be used for degradable or dissolvable component of a downhole tool.
1 . A degradable composite, comprising:
about 20-70% by weight of polyester, wherein the polyester comprises polyethylene terephthalate (PET) or polyethylene naphthalate (PEN);
about 4-30% by weight of calcium oxide and calcium hydroxide, wherein the calcium oxide is present in an amount of about 2-25% by weight of the composite and the calcium hydroxide is present in an amount of about 2-15% by weight of the composite, and
about 1-50% by weight of fiber, wherein the composite has a tensile strength of at least about 90 MPa.
2 . The degradable composite according to claim 1 , wherein the polyester is about 30-60% by weight of the composite, and wherein the calcium oxide is about 5-20% by weight of the composite and the calcium hydroxide is about 2-10% by weight of the composite.
3 . The degradable composite according to claim 1 , wherein the calcium oxide is about 10-15% 2-25% of the composites.
4 . The degradable composite according to claim 1 , wherein the calcium hydroxide is about 2-15% of the composites, and wherein the calcium oxide is about 2-25% of the composite.
5 . The degradable composite according to claim 1 , wherein the fiber is about 10-50% of the composites, and wherein the fiber is glass fiber having an average diameter of about 10-20 micrometers.