Looking at raw materials, BCF reports ethyl acetates prices are up over 20%, acrylic resins were up 5% in 2004 and 7% in 2005 so far, 20% for acrylic acids
and acetates, 32% for ethylene, and UV resins up 10%.
In this work, different poly(butadiene-co-acrylic acid(g)acrylic acid) and poly(butadiene(g)acrylic acid) polymers were obtained by reaction of oligomers and acrylic acids in different ratios and conditions.
All these substrates were prepared by using a co-oligomer (butadiene-co-acrylic acid) synthesized by copolymerization in a closed steel reactor at 70[degrees]C using 1,3-butadiene and acrylic acid as monomers and benzoyl peroxide as initiator.
Gel 1042 was obtained by reacting the before mentioned oligomer and recently distilled acrylic acid (ratio 1:0.
Gel 111 was obtained by reacting the co-oligomer butadiene-co-acrylic acid and acrylic acid in a ratio 1:1 wt/wt after 1 hr of reaction and 80[degrees]C in benzene.
By reacting oligomers or co-oligomers of butadiene-acrylic acid (BuAA) with acrylic acid as monomer, using different ratios of reactives, we obtained gels swellable in water, with capacity of retention of inorganic and organic cations.
Reactions of the double bonds of the polybutadiene chain with that of the acrylic acid led us to anionic hydrogels.
The swelling indexes for the hydrogels 111 to 1225 along with an increased content of acrylic acid showed a growth of the ratio V/Vo from 7.
The two competitive reactions that could take place between the double bonds of BuAA and those of the acrylic acid could lead to different types of products, more or less fibrously according to the content of polybutadiene chains and to the solvent used.