Patent ID: 7129310

Claim:
A solid silicone polyester suitable for a powder coating, said silicone polyester prepared by reacting a silicone with a polyester, the resulting silicone polyester having a Tg between 35° C. and 75° C., wherein the polyester and the silicone being reacted to form the silicone polyester each have a Tg greater than 30° C.; wherein the silicone comprises a silanol-functional organopolysiloxane resin which contains at least one or more of the repeating units having the formulae: R a 1 ⁢ R b 2 ⁢ SiO 2 2 ( D ⁢ ⁢ units ) R a 1 ⁢ R b 2 ⁢ SiO 3 2 ( T ⁢ ⁢ units ) wherein R 1 and R 2 are indenendendy a C 1-20 hydrocarbon, optionally interspersed with a hereroatom linking group such as, but not limited to, a is an integer of 0, 1, 2 or 3, preferably 0, 1, or 2; b is an integer of 0, 1, 2 or 3, preferably 0, 1, or 2; and in D units, a+b+c=2, and in T units, a+b+c=1; and wherein the organopolysiloxane resin comprises 95 mole percent T units and 5 mole percent D units, based on the total number of moles of the organopolysiloxane resin.