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. 09, 2024
Filed:
Sep. 30, 2019
Dow Global Technologies Llc, Midland, MI (US);
Dow Turkiye Kimya Sanayi VE Ticaret Limited Sirketi, Kocaeli, TR;
Rossella Riccio, Correggio, IT;
Elena Ferrari, Vigevano, IT;
Luigi Bertucelli, Reggio Emilia, IT;
Esma Atlandi, Vigevano, IT;
Giuseppe Vairo, Correggio, IT;
Dow Global Technologies LLC, Midland, MI (US);
DOW TURKIYE KIMYA SANAYI VE TICARET LTD SIRKETI, Kocaeli, TR;
Abstract
A rigid polyurethane foam formulation comprising a polyol composition comprising, by weight based on the weight of the polyol composition, more than 70% of at least one polyester polyol having an average hydroxyl number of from 150 to less than 300 mg KOH/g and an average functionality of at least 2; a blowing agent comprising water and an auxiliary blowing agent; a silicone copolymer surfactant; from 1% to 5% by weight based on the weight of the polyol composition, of a cyclic siloxane having a surface tension less than 21 dynes/cm at 25° C., wherein the weight ratio of the cyclic siloxane to the silicone copolymer surfactant is from 0.6 to less than 2.27; a catalyst, and optionally a flame retardant; and a polyisocyanate; such that the isocyanate index is in the range of from 180 to 500; a rigid polyurethane foam formed from the foam formulation; and a method of forming a rigid polyurethane foam.