Process for insulating pipes using polyurethane rigid foams by the rotational casting process
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 24, 1996
Grant Date -
N/A
app pub date -
Feb 3, 1995
filing date -
Feb 17, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a process for insulating pipes by applying a rigid polyurethane foam as an insulating layer and optionally an external top coating by the rotational casting process. The rigid polyurethane foam is obtained by a) an aromatic polyisocyanate, b) an organic polyhydroxyl compound, c) an aliphatic, cycloaliphatic or aromatic polyamine and/or polyimine having a molecular weight of from 32 to 1,000 as the cross linking agent in the presence d) a blowing agent, and optionally in the presence of e) known auxiliary substances and additives and in the presence of f) one or more compounds having a molecular weight of from about 166 to about 1,000 and being of the general formula ##STR1## wherein n represents an integer between 2 and 9, preferably 2 and 3, R.sup.1 signifies hydrogen, a C.sub.1 -C.sub.9 alkyl radical or a ##STR2## R.sup.2 signifies hydrogen, and R.sup.3 and R.sup.4 signify hydrogen or methyl.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully