if you only sell 6% of the company then only 6% of profits will be paid as dividends ?
No. You misunderstood me or I was not clear enough.
Lest say you have a Co and you own 100% shares. Lets call those shares "S". If "S" has right for divs, you get 100% of the divs. There are 100 shares of "S" outstanding and those shares are all yours.
Now, you decide to take your Co public. Co (not you!) usually issues additional shares of "S" and sells those to the public.
Why? To rise capital for expansion and give your existing shares additional value and liquidity, Or get you out of the business so you can go and drink yourself to death in Tijuana... what ever rocks your boat. (there are lost of reasons why to go public/sell your Co).
What ever rights the S had, additional S will have that too. Lets say Co issued 100 new shares of S @ 10. Your outstanding shares of S is now 200 and you hold 50% of S.
Your Co can have lots of different types of stock issued, privately or publicly and with different bells and whistles attached. This is all equity and when issued by Co (not you), money (or equivalent) must change hands. You can not just invent equity out of this air.
Now, lest say your Co also issues shares called "S.nv" (non voting) @ 10 and those shares will represent 10% of your total equity (200 shares of S).
S.nv also has rights for dividends. Now you have total outstanding S - 200 shares and 20 shares of S.nv.
When the div day arrives, S gets 80 and S.nv get 20% of dividends.
If you want those shares as a owner of S, you need to buy them or have the Co buy those for you (bad for all the other stock holders).
You can not just take those "S.nv" shares for yourself because you are the majority owner of S.