The embodiments described herein relate to chemically and mechanically durable glass compositions and pharmaceutical packaging formed from the same. According to one embodiment, a glass for pharmaceutical packaging includes from about 70 mol. % to about 80 mol. % SiO 2 ; from about 4 mol. % to about 8 mol. % alkaline earth oxide, the alkaline earth oxide comprising MgO and CaO; X mol. % Al 2 O 3 , wherein X is from about 4 to about 8; and Y mol. % alkali oxide comprising non-zero amounts of Na 2 O and K 2 O, wherein Y is about 9-15 mol. % and a ratio of Y:X is greater than 1.

Claims

28 · 4 independent · depth 3

28 granted claims

›1.independentA glass for pharmaceutical packaging having a glass composition comprising:nfrom about 70 mol. % to about 80 mol. % SiO2;from about 4 mol. % to about …+12

›2.↳ 1The glass for pharmaceutical packaging of claim 1, wherein the SiO2 is present in an amount from about 74 mol. % to about 78 mol. %.d2

›3.↳ 1The glass for pharmaceutical packaging of claim 1, wherein the alkaline earth oxide comprises a ratio (CaO (mol. %)/(CaO (mol. %)+MgO (mol. %))) is le…d2

›4.↳ 1The glass for pharmaceutical packaging of claim 1, wherein the alkaline earth oxide comprises from about 0.1 mol. % to about 1.0 mol. % CaO.d2

›5.↳ 1The glass for pharmaceutical packaging of claim 1, wherein a ratio of Y:X is less than or equal to 2.d2+1

›7.↳ 1The glass for pharmaceutical packaging of claim 1, wherein the glass composition is free of boron and compounds of boron.d2

›8.↳ 1The glass for pharmaceutical packaging of claim 1, wherein the glass has a type HGB1 hydrolytic resistance according to ISO 719.d2

›9.↳ 1The glass for pharmaceutical packaging of claim 1, wherein the glass has at least a class S3 acid resistance according to DIN 12116.d2

›10.↳ 1The glass for pharmaceutical packaging of claim 1, wherein the glass has at least a class A2 base resistance according to ISO 695.d2

›11.↳ 1The glass of claim 1, wherein a coefficient of thermal expansion of the glass is less than 70Ã—10âˆ’7Kâˆ’1.d2

›12.↳ 1The glass for pharmaceutical packaging of claim 1, wherein the glass is ion exchange strengthened and has a compressive stress layer with a depth of l…d2+1

›14.independentA glass for pharmaceutical packaging having a glass composition comprising:nfrom about 74 mol. % to about 80 mol. % SiO2;alkaline earth oxide comprisi…+7

›22.independentA glass for pharmaceutical packaging having a glass composition comprising:nfrom about 70 mol. % to about 80 mol. % SiO2;from about 4 mol. % to about …+3

›26.independentA glass for pharmaceutical packaging having a glass composition comprising:nfrom about 70 mol. % to about 80 mol. % SiO2;alkaline earth oxide comprisi…+2

Classifications

5 codes

IPC · International Patent Classification

Section C — Chemistry; metallurgy

C03C3/087
C03C3/091
C03C4/18
C03C4/20
C03C21/00

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Pendency

0.8 y

299 days filing → grant

Office actions

non-final + final

Responses

1 RCE

Examiner

Anthony J Green

art unit 1731 · TC 1700

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Citations: 142 back · 0 forward

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Priority chain

2 priority documents

Priority

25 Oct 2011

earliest claimed

›Priority documents — 2

Type	Document	Date
provisional	US 61551163	25 Oct 2011
related publication	US 20150232374 A1	20 Aug 2015

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