Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1992-12-21
1994-02-22
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521161, 521902, C08G 1832
Patent
active
052887685
ABSTRACT:
Rigid urea-modified polyisocyanurate foams with improved dimensional stability and flame retardancy have densities of 0.5-20 p.c.f., a limiting oxygen index greater than 22 and dimensional changes at 100% R.H. and 70.degree. C. of less than 2% in any linear dimension and a method of making same. The method comprises reacting an organic polyisocyanate, a blowing agent and an N,N'-dialkyl aromatic diamine in the presence of a trimerization catalyst and, if water is used as the blowing agent, a blowing catalyst, wherein the N,N'-dialkyl aromatic diamine and an amine produced by water, if used, constitute the sole sources of active hydrogen.
REFERENCES:
patent: 3846351 (1974-11-01), Huffaker et al.
patent: 4425446 (1984-01-01), Malwitz et al.
patent: 4578446 (1986-03-01), House et al.
patent: 4801674 (1989-01-01), Scott, Jr. et al.
patent: 5223551 (1993-06-01), Gattuso
Ashida, Polyisocyanurate Foams, Chap. 6, The Handbook of Polymeric Foams and Foam Technology, edited by D. Klempner and K. C. Frisch, Hauser Publishers, 1991, p. 96.
Ashida, ibid, pp. 97-98.
Gattuso et al., Secondary Amine Extended Flexible Polyurethane-Urea Foams, 88, Proceedings of the S.P.I. 31st Annual Technical/Marketing Conference, Oct. 19-21, 1988.
"The ICI Polyurethanes Book", J. Wiley and Sons, 1987, pp. 29-34).
Gattuso Mark J.
House David W.
Scott, Jr. Ray V.
Johnson Rachel
Kight III John
McBride Thomas K.
Snyder Eugene I.
UOP
LandOfFree
Urea-modified isocyanurates does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Urea-modified isocyanurates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Urea-modified isocyanurates will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-171807