Cross-linked organosilicon networks that degrade with fluoride salts

A thermoset made by a process comprising:

• reacting a di- or tri-functional isocyanate with a silyl-containing compound to form a polyurethane having at least one unreacted isocyanate group;
• wherein the silyl-containing compound has the formula:
• SiR1n[R3—(O—CO—X—R3)m—OH]4-n;
• wherein each X is independently selected from —O— and —NR2—,
• wherein each R1 is independently selected from alkyl groups and aryl groups;
• wherein each R2 is independently selected from —H, alkyl groups, and aryl groups;
• wherein each R3 is an independently selected alkylene group;
• wherein n is 0, 1, or 2;
• and
• wherein each m is an independently selected non-negative integer;
• reacting the polyurethane with an aminoalkylalkoxysilane to form an alkoxysilane-terminated polyurethane;
• and
• moisture-curing the alkoxysilane-terminated polyurethane to form the thermoset.