This polyamide composite material consists of a fibrous material impregnated with a polyamide resin where at least 50 mole percent
of diamine is xylylenediamine and having a number-average molecular weight (Mn) of 6,000 to 30,000 gm/mole, and containing a component of a diamine molecular weight of less than 1,000 gm/mole.
Key statement: An elastomeric composition incorporating a hydrocarbon polymer modifier including piperylene, cyclic pentadiene and aromatic components, and having a softening point from 80[degrees]C to 160[degrees]C, z-average molecular weight greater than 10,000, and at least 1 mole percent
aromatic hydrogen, based on the total moles of hydrogen in the modifier.
The UV-absorbing polymer has an average molecular weight of at least 2000 and comprises at least 5 mole percent
of the first pendant group.
--As the ethylene mole percent
increases, the barrier decreases.
40, 60, 80 indicate the mole percent
of triethoxysillyl groups in hydroxyl groups of PHEMA.