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US 10,294,333 B2Granted
Room temperature curable siloxane-based gels
Assignee3M Innovative Properties Company
InventorsJunkang J. Liu, Hironobu Ishiwatari, Siegfried K. Welke, Yoshiteru Kakinuma
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Abstract
Siloxane-based gel compositions are prepared from room temperature condensation curable mixtures that include 0.5-45% by weight silicone resin with at least two hydroxyl groups, 99.5-55% by weight of at least one silanol-terminated siloxane fluid, and a co-curable compound with an amino group. The siloxane-based gel compositions can be used as adhesives or sealants in medical articles.
Claims22
A gel composition comprising the reaction product of a condensation curable mixture comprising:
- at least 0.5 to less than 45% by weight silicone resin comprising at least two hydroxyl groups;
- at least 55 to less than 99.5% by weight of at least one silanol-terminated siloxane fluid;
- and
- a co-curable compound comprising an amino group, wherein the condensation curable mixture is curable at room temperature and wherein the condensation curable mixture upon curing is a gel selected from a medical gel adhesive or a medical gel sealant, wherein the gel comprises a crosslinked matrix containing a liquid or fluid.
1 more element
An article comprising:
- a substrate;
- and
- a layer of adhesive gel disposed on at least a portion of at least one major surface of the substrate, the adhesive gel comprising the reaction product of a condensation curable mixture comprising:
- at least 0.5 to less than 45% by weight silicone resin comprising at least two hydroxyl groups;
- at least 55 to less than 99.5% by weight of at least one silanol-terminated siloxane fluid;
- and
- a co-curable compound comprising an amino group, wherein the condensation curable mixture is curable at room temperature, and wherein the gel comprises a crosslinked matrix and a liquid or fluid.
4 more elements
A method of preparing a medical article comprising:
- providing a condensation curable gel precursor composition comprising:
- at least 0.5 to less than 45% by weight silicone resin comprising at least two hydroxyl groups;
- at least 55 to less than 99.5% by weight of at least one silanol-terminated siloxane fluid;
- and
- a co-curable compound comprising an amino group, wherein the condensation curable gel precursor composition is curable at room temperature;
- applying the condensation curable gel precursor composition to a substrate;
- and
- permitting the condensation curable gel precursor composition to cure at room temperature to form a gel.
5 more elements
Dependencies are inferred from the claim text.