US 12,291,483 B2
Soft, chemically-strengthenable glasses for laminates
Timothy Michael Gross, Corning, NY (US); and Lisa Anne Tietz Moore, Corning, NY (US)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Appl. No. 17/271,051
Filed by CORNING INCORPORATED, Corning, NY (US)
PCT Filed Aug. 23, 2019, PCT No. PCT/US2019/047836
§ 371(c)(1), (2) Date Feb. 24, 2021,
PCT Pub. No. WO2020/046730, PCT Pub. Date Mar. 5, 2020.
Claims priority of provisional application 62/724,798, filed on Aug. 30, 2018.
Prior Publication US 2021/0323857 A1, Oct. 21, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C03C 3/085 (2006.01); C03C 21/00 (2006.01)
CPC C03C 3/085 (2013.01) [C03C 21/002 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A glass article comprising a glass composition, the glass composition comprising:
SiO2 in an amount in a range from 63 mol % to 75 mol %;
Al2O3 in an amount in a range from 7 mol % to 13 mol %;
a total amount of alkali metal oxides (R2O) in an amount in a range from 13 mol % to 24 mol %, wherein R2O—Al2O3 is from 8 mol % to 12 mol %, wherein Li2O, if present, is present in an amount less than 0.001 mol %;
P2O5 in an amount in a range from 0.1 mol % to 1.2 mol %;
a water content β-OH in the range of 0.1 abs/mm to 0.5 abs/mm; and
at least one of MgO or ZnO, wherein the amount of MgO is in a range from 0 mol % to 7 mol % and the amount of ZnO is in a range from 0 mol % to 7 mol %,
wherein the glass article comprises an anneal point (° C.) and a softening point (° C.), and the relationship of (anneal point+softening point)/2 is less than 665° C.