US 12,064,941 B2
UV stable fire-resistant glazing laminates
Richard Ainsworth, St. Helens (GB); Vincent Crook, St. Helens (GB); John Holland, St. Helens (GB); Saminu Magami, St. Helens (GB); and Catherine Norris, St. Helens (GB)
Assigned to Pyroguard UK Ltd., St. Helens (GB)
Filed by Pyroguard UK Ltd., St. Helens (GB)
Filed on Nov. 20, 2020, as Appl. No. 16/953,445.
Claims priority of application No. 1916952 (GB), filed on Nov. 21, 2019.
Prior Publication US 2021/0154981 A1, May 27, 2021
Int. Cl. B32B 17/10 (2006.01); B32B 7/023 (2019.01); B32B 7/10 (2006.01)
CPC B32B 17/10678 (2013.01) [B32B 7/023 (2019.01); B32B 7/10 (2013.01); B32B 17/10036 (2013.01); B32B 17/10697 (2013.01); B32B 2250/03 (2013.01); B32B 2250/05 (2013.01); B32B 2250/42 (2013.01); B32B 2305/72 (2013.01); B32B 2307/3065 (2013.01); B32B 2307/412 (2013.01); B32B 2307/71 (2013.01); B32B 2551/00 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An aqueous composition for preparing a castable UV-stable fire-resistant interlayer, comprising:
a mixed alkali metal silicate of general formula SiO2·K2O·M2O, where:
M is Li and/or Na,
the weight ratio of SiO2:K2O is between about 2.5:1 and about 4.0:1, and
the weight ratio of SiO2:M2O is between about 2.2:0.1 and about 4.5:0.1;
about 0.5% w/w-about 5% w/w of a hydroxylated amine compound;
about 10% w/w-about 20% w/w of a polyhydric organic compound; and
about 15% w/w-about 35% w/w water.