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:
Mar. 16, 1999
Filed:
Nov. 25, 1997
Jennifer Ann Chojnacki, Allentown, PA (US);
Karla Asuncion Sabram, Macungie, PA (US);
Air Products and Chemicals, Inc., Allentown, PA (US);
Abstract
A method for making a rigid polyurethane foam by reacting a polyisocyanate and a polyol in the presence of a urethane catalyst, a blowing agent and a silicone surfactant characterized by employing as a blowing agent a C1-C4 HFC or HCFC, preferably HFC-245fa, and as the silicone surfactant a polyether-polysiloxane coploymer having a total surfactant molecular weight of 12,000 to 100,000 g/mole, a wt % siloxane in the surfactant of 10 to 40 wt %, a molecular weight of the polyether portion of 1200 to 6,000 g/mole, and a wt % of ethylene oxide in the polyether portion of 30-100 wt %.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile