Siloxane-modified polyester resins and production processes thereof
AssigneesDainichiseika Color & Chemicals Mfg. Co., Ltd., Ukima Colour & Chemicals Mfg. Co., Ltd.
InventorsKazuyuki Hanada, Iwao Misaizu, Akihiko Shibuya, Katsumi Kuriyama
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Abstract
Siloxane-modified polyester resins are disclosed. These resins comprise a copolymer of a siloxane compound, which contains at least one active hydrogen atom, and a lactone compound. The copolymer is substantially free of unreacted siloxane compound. The siloxane-modified polyester resins are useful for the production of heat-sensitive recording material, magnetic recording media and release agents. Processes for the production of the siloxane-modified polyester resins are also disclosed.
Claims4
A siloxane-modified polyester resin crosslinked with a polyisocyanate compound obtained from a copolymer of a siloxane compound, which contains at least one active hydrogen atom, with a lactone compound and a crosslinking amount of a polyisocyanate compound, said copolymer being substantially free of unreacted siloxane compound.
A process for the production of a siloxane-modified polyester resin substantially free of unreacted siloxane compound crosslinked with a polyisocyanate compound, which comprises copolymerizing a siloxane compound, which contains at least one active hydrogen, with a lactone compound and then removing any unreacted siloxane compound under reduced pressure, and thererafter crosslinking the resulting siloxane-modified polyester resin with a crosslinking amount of a polyisocyanate compound.
Dependencies are inferred from the claim text.