Find information about rosin products at Rosinfactory.com
Rosinfactory.com         (201)565-8888
Rosinfactory.com         (201)565-8888
  Welcome to www.rosinfactory.com, Your source for all rosin information and products.
 

 

Home
Uses of Rosin
Types of Rosin
Rosin Grades
Rosin Chemistry
Rosin Recipe
Rosin Products
Violin Rosin
Scalding Rosin
Binders and Adhesives
Rosin Distributors
Rosin Experiments
Rosin Paper
Rosin Flux
Rosin Baked Potatoes
Liquid Flux Formulas
Rosin Retailers
Rosin Wholesalers
Rosin Powder
Rosin Bag
Rosin Salves
Rosin allergy
Alternative Names
Questions & Answers
...
...
...

 

Rosin Flux

Rosin Paste Fluxes are intended to be used to reduce solder balling, and bridging. The proper flux allows for proper solder flow and increased wetting of desired areas.

Rosin Fluxes

Rosin or colophony is a natural product that is extracted from the stumps or bark of pine trees. The composition of rosin varies from batch to batch, but a general formula is C19H29COOH. It consists mainly of abietic acid (70 to 85 percent, depending on the source) with 10 to 15 percent pimaric acids. Rosins contain several percent of unsaponifiable hydrocarbons; for rosin flux removal, saponifiers (a form of alkaline chemical to make the water soapy) must be added.
Rosin flux is composed primarily of natural resin extracted from the oleoresin of pine trees and refined. Rosin fluxes are inactive at room temperatures but become active when heated to soldering temperatures. They are naturally acidic (165 to 170 mg KOH per g equivalent). They are soluble in a variety of solvents but not water. This is the reason for using solvents, semiaqueous solvents or water with saponifiers to remove them.
The melting point of rosin is 172C to 175C (342Fto 347F), or just below the melting point of solder (183C). A desirable flux should melt and become active slightly below the soldering temperature. A flux is not effective if it decomposes at soldering temperatures, however. This means that synthetic fluxes can be used at higher temperatures than rosin fluxes, because the former decompose at higher temperatures. In general, rosin fluxes are weak, and to improve their activity (fluxing action), the use of halide activators is required.
The general formula for oxide removal by rosin is:
RCO2H + MX = RCO2M + HX
where RCO2H is rosin in the flux (C19H29COOH mentioned earlier)
M = Sn, Pb or Cu
X = oxide, hydroxide or carbonate
As mentioned earlier, rosin fluxes are also referred to as rosin (R), rosin mildly activated (RMA) and rosin activated (RA). The various categories of rosin fluxes differ in the concentration of the activators (halide, organic acids, amino acids, etc.). R and RMA types are generally noncorrosive, hence safe. R and RMA fluxes are not even cleaned in some applications even though they are not classified as no-clean. However, without cleaning, assembly reliability may be compromised because the sticky rosin can attract dust and harmful contaminants in the field during service.
The fluxes described here require cleaning. To get away from cleaning, many companies have shifted to no-clean flux, which will be the focus of my next column.
 

Where to buy gum rosin or pine rosin?

Where to buy Rosin?

Our rosin products are available for sale at www.ChemicalStore.com. For large orders please call in advance and verify the availability, wholesale discounts and shipping options. If you cannot find any product in the online store of your choice, please use the search option of the store or call (973)405-6248 for further assistance.

  All orders will be shipped from our warehouses in United States (USA), Canada or United Kingdom. We ship worldwide to most countries including U.S., Canada, Australia, United Kingdom, New Zealand, Germany, France, Netherlands, and many other countries.

Products of MiniScience for wholesale and retail

Rosin Products

Honduran Rosin
Chinese Rosin Lumps
Chinese Rosin
Brazilian Rosin Flakes
Brazilian Rosin (Flaked)
Rosin Powder
Rosin Powder
Hydrogenated Rosin
Hydrogenised Rosin
 
Other Rosin Websites
Rosin-Depot.com
Rosin-Factory.com
Rosin-Products.com
Rosin-Shop.com
Rosin-Store.com
Rosin-Warehouse.com
RosinDepot.com
RosinFactory.com
RosinProducts.com
RosinStore.com
RosinWarehouse.com
Violin-Rosin.com
 

 

Copyright 2005 MiniScience Inc.