The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 06, 2021
Filed:
Aug. 27, 2018
Covestro Llc, Pittsburgh, PA (US);
George Combs, McMurray, PA (US);
Covestro LLC, Pittsburgh, PA (US);
Abstract
Disclosed are methods for formulating a polyisocyanurate foam-forming composition with good low temperature insulation performance. The polyisocyanurate foam-forming composition includes: a) an organic polyisocyanate, b) a polyol composition comprising at least one polyester polyol with a nominal hydroxyl functionality of at least 2.0, c) a blowing agent composition present in an amount sufficient to produce foam having a density of less than 1.85 lb/ft3 and comprising: (1) a hydrocarbon having an atmospheric pressure boiling point of at least 68° F. (20° C.), and (2) water, d) a trimerization catalyst, e) a flame retardant, and f) a silicone surface-active agent. The methods include: (A) evaluating a measured Relative Hydrocarbon Solubility and, optionally, evaluating a measured a Surfactant Water Solubility, a Surfactant Turbidity, or evaluating both the Surfactant Water Solubility and the Surfactant Turbidity; and (B) formulating the polyisocyanurate foam-forming composition with the silicone surface-active agent in light of such evaluation.