Does a company have to act selflessly to be considered socially responsible

Does a company have to act selflessly to be considered socially responsible? For example, when building a new plant, a corporation voluntarily invested in additional equipment that enabled it to reduce its pollution emissions beyond any current law. Knowing that it would be very expensive for its competitors to do the same, the firm lobbies the government to make pollution regulation more restrictive on the entire industry, Is this company socially responsible? Were its managers acting ethically?