Definition: The associative property states that you can add or multiply regardless of how the numbers are grouped. By 'grouped' we mean 'how you use parenthesis'. In other words, if you are adding or multiplying it does not matter where you put the parenthesis.
Full Definition of ROSIN. : a translucent amber-colored to almost black brittle friable resin that is obtained from the oleoresin or deadwood of pine trees or from tall oil and used especially in making varnish.
The reasons could be listed as: 1  They are noncorrosive at room temperature. 2  Rosin type flux is hygroscopic and can act as an insulation. 3  They normally cure at room temperature to entrap potentially corrosive activators.