Cationically and radiation curable composition
Assignee3M Innovative Properties Company
InventorsJoachim W. Zech, Hendrik Grupp
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Abstract
The invention relates to a curable composition comprising a resin matrix, the resin matrix comprising cationically curable components (A) and radiation curable components (B), a curing system, the curing system comprising a starter (A-S) suitable for curing the cationically curable components (A) and a photo-initiator (B-I), the curable composition being provided as a Base Part and Catalyst Part being separated before use, wherein the Base Part comprises components (A) and (B) and wherein the Catalyst Part comprises components (A-S) and (B-I). The composition can be used for taking a dental impression including the subgingival parts.
Claims19
A curable composition comprising:
- a Base Part comprising a resin matrix, the resin matrix comprising:
- cationically curable components (A) comprising an aziridino moiety, and
- radiation curable components (B) comprising a (meth)acrylate moiety,
- wherein the cationically curable components (A) and radiation curable components (B) are present in a weight ratio of 10:1 to 1:1;
- and
- a Catalyst Part comprising a curing system,
- the curing system comprising:
- a starter (A-S), and
- a photo-initiator (B-I),
- wherein the Base Part and the Catalyst Part are separate,
- the curable composition void of reinforcing fillers and characterized by a Shore hardness A of 50 to 90, as determined according to DIN 53505:2000-8, 24 h after mixing the Base Part and the Catalyst Part and being exposed to light.
Dependencies are inferred from the claim text.