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US 2005/0090604 A1Published application
Depot polymerization starter beads
AssigneeRoehm GmbH
InventorsPeter Quis, Heike Heeb, Helmut Schwind, Harald Draeger
Life of this patent
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Abstract
The invention relates to polymer beads having a high content of diacyl peroxides. A prolongation of the pot life in reaction resins based on high-boiling methacrylate esters is achieved due to this high content of peroxides.
Claims17
1-4. (canceled)
A bead, comprising:
- (A) a suspension copolymer;
- and
- (B) from 1-10% by weight of at least one polymerization initiator selected from the group consisting of peroxides and peroxide mixtures;
- wherein said suspension copolymer comprises in copolymerized form the following components (a), (b) and (c):
- (a) more than 1% by weight of a derivative of an unsaturated carboxylic acid of the formula (I),
- wherein
- R1=H or CH3, and
- R2=methyl, ethyl;
- (b) more than 1% by weight of a derivative of an unsaturated carboxylic acid of the formula (II),
- wherein
- R3=H or CH3, and
- R4=n-butyl, isobutyl;
- and
- (c) from 0-15% of one or more monomers copolymerizable with the monomers (a) or (b);
- wherein a sum of the amounts of (a), (b), (c) and (B) is 100%.
12 more elements
Dependencies are inferred from the claim text.