Peroxide composition
View Patent ↗Peroxide compositions include an organic peroxide and a polyalkylene polyol, wherein the organic peroxide is an organic monoperoxycarbonate R—O—CO—O—O-tertiary butyl where R is a C 1 -C 6 alkyl.
1. A peroxide composition comprising
i) tertiarybutyl peroxy isopropyl carbonate; and
ii) a polyalkylene polyol selected from the group consisting of 1,2-polypropylene glycol and polyethylene glycol that acts as a diluent for the organic monoperoxycarbonate, wherein
the polyalkylene polyol is an oligomer or polymer having a number average molecular weight as measured by gel permeation chromatography from 400 up to and including 2000 g/mol, and wherein
the polyalkylene polyol is present in an amount of at least 23 and lower than 95 wt. % relative to total weight of the peroxide composition.
2. A process for radically curing an unsaturated polyester or vinyl ester resin composition comprising
(i) combining an unsaturated polyester or vinyl ester resin composition with a peroxide composition according to claim 1 ; and then
(ii) radically curing the resin composition.
3. The process according to claim 2 , wherein the curing is effected by moulding at increased temperature.
4. The process according to claim 3 , wherein the moulding is compression moulding.
5. A two-component composition comprising at least a first component being a curable resin composition comprising an unsaturated polyester and/or vinyl ester and at least a second component comprising a peroxide composition according to claim 1 .
6. The two-component composition according to claim 5 , wherein the curable resin composition is a thermally curable resin composition comprising:
(a) 5-35 wt % of an unsaturated polyester and/or a vinyl ester,
(b) 25-75 wt % of a monomer which will copolymerize with the polyester or the vinyl ester,
(c) 20-50 wt % fibrous reinforcement material, and
(d) 0.1-10 wt % a low profile additive and/or a low shrink additive.
7. A part obtained by curing a peroxide composition according to claim 1 with a curable resin composition.
8. A cured part comprising a cured composition according to claim 5 .
9. The cured part according to claim 8 , wherein curing is effected by compression moulding.
10. A cured part comprising a cured composition according to claim 6 .
11. A cured part comprising a cured composition according to claim 7 .
12. A cured part obtained by the process according to claim 3 .
13. A cured part obtained by the process according to claim 4 .