Borosilicate glass of high chemical resistance and low viscosity

Details Borosilicate glass of high chemical resistance and low viscosity Borosilicate glass of high chemical resistance and low viscosity

1996-09-30

1998-04-07

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 66, C03C 3093

Patent

active

057364761

ABSTRACT:
The invention relates to a borosilicate glass of high chemical resistance and low viscosity which contains zirconium oxide and lithium oxide. The borosilicate glass has hydrolytic resistance (in accordance with DIN ISO 719), class 1 acid resistance (in accordance with DIN 12116), and class 1 alkali resistance (in accordance with DIN ISO 659), and with a low operating temperature V.sub.A of between 1180.degree. C. to 1230.degree. C. and a coefficient of thermal expansion .alpha..sub.20/300 of 4.9.times.10.sup.-6 K.sup.-1. The borosilicate glass has the composition (in % by weight, based on oxide): SiO.sub.2 73-75; B.sub.2 0.sub.3 7-10; Al.sub.2 0.sub.3 5-7; ZrO.sub.2 1-3; Li.sub.2 0 0.5-1.5; Na.sub.2 0 0-10; K.sub.2 0 0-10; MgO 0-3; CaO 0-3; BaO 0-3; SrO 0-3; ZnO 0-3; ratio of SiO.sub.2 /B.sub.2 0.sub.3 .gtoreq.7.5; .SIGMA. SiO.sub.2 +Al.sub.2 0.sub.3 +ZrO.sub.2 80-83 and .SIGMA. MgO+CaO+BaO+SrO+ZnO.ltoreq.3, and fluorides 0-3. The glass is particularly suitable for use as a versatile primary packaging material for pharmaceuticals, for example as ampule glass.

REFERENCES:
patent: 4259118 (1981-03-01), Sack
patent: 4386164 (1983-05-01), Moser
patent: 4870034 (1989-09-01), Kiefer
patent: 5017521 (1991-05-01), Yale et al.
patent: 5219801 (1993-06-01), Shorrock et al.
patent: 5459110 (1995-10-01), Brix
patent: 5525553 (1996-06-01), Brocheton et al.
patent: 5599753 (1997-02-01), Watzke et al.
patent: 5610108 (1997-03-01), Watzke et al.

Affiliated with

Also associated with

Rating

Borosilicate glass of high chemical resistance and low viscosity does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Borosilicate glass of high chemical resistance and low viscosity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Borosilicate glass of high chemical resistance and low viscosity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-12989