Corian kitchen counter tops do have a ten year limited residential warranty. This warranty only applies if the counter top was installed by an authorized installer, and the warrenty does have certain stipulations that come with it.
DuPont, the maker of Corian products, states that a ten year limited residential warranty is only applicable if the counter top was installed by an authorized fabricator/installer and if any potential defect was found to have occurred during the first ten years. The warranty does not, however, cover damage caused by "physical, chemical or other abuse, damage from excessive heat, use in certain applications, or acts of nature". Their website lists, in detail, what acts they consider to be any of the preceding damage causes.