2 hydroxy ethyl acrylate

Polar monomers may also be introduced into the PSA because they provide a simple way to incorporate functional groups into the polymer backbone that are available for further chemical reaction. For example, monomers like 2-hydroxy ethyl acrylate or 3-hydroxypropylacrylamide will introduce hydroxy functionality in the polymer. These hydroxy groups can be used for chemical... 

In addition, Kennedy and Hongu [129] have prepared amphiphilic diblock cooligomers from the condensation of a-methoxy-co-hydroxy polyoxyethylene with isocyanato-terminated polyisobutylene. In the same way, from a,codiisocyanate styrenic telomer 29, a Japanese team [130] has prepared PFA-h-PS-h-PFA and PHEA-h-PS-h-PHEA triblock copolymers (where FA and HEA represents fluoro acrylate and 2-hydroxy ethyl acrylate, respectively), as follows ... 

Although there are some limitations on the molecular weights of the linear polymers which may be obtained by this method, AM polymerization offers an attractive, synthetic route for preparation of functional, medium molecular weight polymers by cationic polymerization of oxiranes. As the process involves the extension of the chain of hydroxyl group containing compound used to initiate the polymerization (initiator), the method is especially well suited for preparation of oligodiols (low molecular weight diols as initiators) and macromonomers (for example, hydroxy-ethyl acrylate as initiator) ... 

These are made by reacting an acrylate monomer with the diisocyanate, usually in the presence of a catalyst such as dibutyltin dilaurate. An example of a typical urethane acrylate reaction which results in a flexible elastomer, based on hydroxy ethyl acrylate, is shown in Fig. 12.12. 

Monomers Poly-2 -hydroxy ethyl, acrylate, polybutylacrylate, polyethylacrylate, polyvinylpropionate [36]... 

The monomers used for preparation of acrylic polymers vary in nature and can generally be classified as hard (such as methylmethacrylate, styrene and vinyl acetate) or soft (such as ethyl acrylate, butyl acrylate, 2-ethyl hexyl acrylate). Reactive monomers may also have hydroxyl groups (such as hydroxy ethyl acrylate). Acidic monomers such as methacrylic acid are also reactive and may be included in small amounts in order that the acid groups may enhance pigment dispersion. The practical coating systems are usually copolymers of hard and soft monomers. The polymer hardness is characterized by its glass transition temperature, Tg. The Tg (K) of the copolymer can be estimated from the Tg of the individual Tg (K) of the homopolymers with weight fractions and Wj,... 

The polymer composition raises several interesting points. Hydroxy ethyl methacrylate could be replaced effectively wt./wt. by hydroxy ethyl acrylate. The hydroxyethyl acrylate reacts more readily with melamine resins than carboxylic acids. The acrylic acid is added to give water solubility when neutralised. Note that in the absence of the hydroxy monomer, more acrylic acid would be required to solubilise the polymer. The VeoVa has a softening effect on the copolymer and also contributes water resistance to the film. 

Typically, an automotive quality acrylic will be formulated with a mixture of monomers selected fixim styrene (S), methyl methacrylate (MMA), butyl methacrylate (BMA) and butyl acrylate (BA). The hydroxy functionality is introduced via a monomer such as hydroxy ethyl acrylate (HEA) or hydroxy ethyl methacrylate (HEMA) to give hydroxyl values of between 50 and 120 mgKOH/g of solid resin. In addition, a small quantity... 

---