Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Process for casting polyurethane articles
T101303 Process for casting polyurethane articles
Patent Drawings:

Inventor: O'Shaughnessy
Date Issued: December 1, 1981
Application: 06/239,187
Filed: March 2, 1981
Inventors: O'Shaughnessy; Francis (Beaumont, TX)
Assignee:
Primary Examiner:
Assistant Examiner:
Attorney Or Agent:
U.S. Class: 264/102; 264/28; 264/331.19; 528/44
Field Of Search:
International Class:
U.S Patent Documents:
Foreign Patent Documents:
Other References:









Abstract: A mixture of isocyanate-terminated polyurethane prepolymer made from an aliphatic diisocyanate and an approximately stoichiometric amount of a curing aromatic diamine is stored at least -5.degree. to -25.degree. C. until needed. It then is reheated to about 80.degree.-120.degree. C., at which temperature it becomes fluid and pourable. Within this temperature range the mixture has a useful life of at least about 30 minutes. Large batches of prepolymer-curing agent mixture can be prepared using existing processing equipment and techniques, analyzed and stored, then reheated and used for casting of very large articles.
Claim:
Description:
 
 
  Recently Added Patents
Method for remotely measuring fluctuations in the optical index of refraction of a medium
Methods and systems for dynamic spectrum arbitrage
Surface-emitting laser light source using two-dimensional photonic crystal
Horse stationary tab
Wideband antenna
Semiconductor device
Location estimation of wireless terminals through pattern matching of deduced signal strengths
  Randomly Featured Patents
Real time measurement of etch rate during a chemical etching process
Display screen with icon
Methods and apparatus for system framing synchronization control for a framer/mapper/multiplexor device with 1+1 and equipment protection
Marine rescue and recreational board
Strobe dimmer of which the luminous intensity and color temperature are controllable
Cadmium electrode and cell having anti-agglomeration characteristics
Flexible coupler
Biological inoculant effective against aphanomyces
Interactive game kiosk with skateboard
Flame-retardant resin composition and flame-retardant resin-molded article