| 摘要 |
There is described a substantially solid, solvent free, radiation curable composition comprising
a) optionally from 0.1 % to 99.9% by weight of a colorant; and
b) from 0.1% to 99.9% of radiation curable polymer obtained and/or obtainable from at least one mono-(terminal functional forming) monomer of formula I:
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒR 1 (R 2 )C=CR 3 (C=O)(X) n R 4 €ƒ€ƒ€ƒ€ƒ€ƒFormula 1,
where
n is 0 or 1,
X 1 is oxy or -NR 5 - (where R 5 represents H or optionally substituted organo), R 1 independently represents optionally substituted C 1-10 hydrocarbo, hydroxyl, optionally substituted C 2-10 hydrocarbo-oxy comprising a ring moiety, and/or carboxy; and
R 2 , R 3 and R 4 each independently represent H, an optional substituent and/or optionally substituted organo groups and where n is 0, R 3 may also represent oxy or -NR 5 -; and
c) optionally from 0.1% to 90% of a radiation curable high molecular weight reactive diluent; and
d) optionally from 0.01 to 10% of at least one photo-initiator; and
where the radiation curable polymer (b) is
i) obtained and/or obtainable in a suspension polymerisation process using a cobalt catalyst as a chain transfer agent;
ii) is solid under standard conditions; and
iii) is mono-(terminal functional) comprising one terminally located activated unsaturated moiety (such as of Formula 1 herein).
where the composition has at least one of the properties (A) to (F):
A) is substantially free of volatile organic compounds (VOCs);
B) has a residual concentration of initiator (such as peroxide) of less than 0.025 g per g of polymer;
C) comprises a polymer having a total ethylenic unsaturation (for example from moiet(ies) of Formula 1, such as C=C and/or (meth)acrylate) greater than 0.1 milli-equivalents C=C per g polymer;
D) is substantially-free of sulphur comprising species;
E) is substantially free of cobalt (II) species; and/or
F) has a weight average molecular weight (M w ) of less then 25kDa. |
