초록 ▼

Coating compositions are disclosed which use a polyoxetane polymer having CH2－O－-CH2－Rf side chains where Rf is a highly fluorinated alkyl or polyether. The coating compositions use polyisocyanates to create isocyanate terminated polymers from the poly(oxetanes) and from various polyols from alkylen

Coating compositions are disclosed which use a polyoxetane polymer having CH2－O－-CH2－Rf side chains where Rf is a highly fluorinated alkyl or polyether. The coating compositions use polyisocyanates to create isocyanate terminated polymers from the poly(oxetanes) and from various polyols from alkylene oxides or polyester polyols. These can be reacted together to form block copolymer structures or can be linked together when the coating is crosslinked. A preferred method is to use blocked isocyanate groups. Another preferred embodiment is to use the composition as a abrasion resistant coating for glass run channels.

대표청구항 ▼

In an article of manufacture including a window movably and sealingly retained in an elastomeric channel having a lubricous, abrasion resistant coating on at least those portions of said channel which contact said window, the improvement wherein said coating is formed by a process comprising: (a) re

In an article of manufacture including a window movably and sealingly retained in an elastomeric channel having a lubricous, abrasion resistant coating on at least those portions of said channel which contact said window, the improvement wherein said coating is formed by a process comprising: (a) reacting an excess of diisocyanate with a hydroxyl terminated polymer to produce an isocyanate terminated polymer having urethane linkages, wherein said excess is characterized as an NCO:OH ratio of at least 2, at least 5 percent by weight of said isocyanate terminated polymer being one or more repeat units of the structure [Figure] and wherein said repeat units are formed from one or more oxetane monomers and further wherein R is H or an alkyl of from 1 to 6 carbon atoms; and Rf individually on each repeat unit is a linear or branched alkyl of 1 to 20 carbon atoms, a minimum of 75 percent of the H atoms of said Rf being replaced by F and optionally up to all of the remaining H atoms being replaced by I, Cl or Br; or each Rf individually being an oxaperfluorinated polyether having from 4 to 60 carbon atoms, and n is from 1 to 5, (b) chain extending said isocyanate terminated polymer by reacting said isocyanate terminated polymer with a poly(alkylene oxide) polyol, a polyester polyol, or a hydroxyl terminated hydrogenated diene polymer, or combinations thereof, (c) optionally blocking unreacted isocyanate groups in said coating composition, and (d) applying said coating composition to said channel and crosslinking the composition to form said coating.