Applications of Polymerised Phosphonates

Polymerisable phosphonates have very varied uses as components of numerous patent formulations various phosphonates have been prescribed as components of metal surface treatments which involve the formation of polymeric materials (Section 12.7). Polyethylene phosphonate (12.159) has good adhesion to metals. 

Bis(chloroethyl)vinylphosphonate, (C1CH2CH20)2P(0)CH=CH2, can be used to assist the bonding of PTFE films to the inorganic components of razor blade coatings [27]. 

Solutions of certain organophosphonic acids, when appUed to sheet copper or its alloys, will increase solderability and tarnish resistance [28]. 

Various formulations for dental treatment incorporate polymerised phosphonates, which offer certain advantages over phosphates (Section 12.13). Polyvinyl phosphonic add (12.157) and polyethylene phosphonate (12.159) are adsorbed as monolayers on tooth enamel where they resist decay [29]. Copolymers of vinylphosphonic acid and vinylphosphonyl fluoride (12.201) are also adsorbed on tooth surfaces and provide extra resistance to decay by slowly releasing F which can substitute in the tooth hydroxyapatite [30]. 

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