Polyurethane foam for sealant

Details Polyurethane foam for sealant Polyurethane foam for sealant

1997-03-04

1999-11-23

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521129, 521172, 521173, C08G 1832

Patent

active

059901861

ABSTRACT:
A polyurethane foam for a sealant is disclosed which is produced from a composition prepared by compounding reaction mixture comprising a polyisocyanate ingredient and a polyol ingredient with a given amount by weight of an ozone inhibitor ingredient. A sealant of a predetermined shape is obtained from the foam. The polyol ingredient may be one ordinarily used for producing soft polyurethane foams, but especially preferably comprises a polyester-polyether polyol having both an ester segment and an ether segment in the molecular chain. The foam has excellent resistance to ozone deterioration and hence retains a sufficient air permeability required of a sealant for practical use. Further, the foam suffers little decrease in tensile strength from the initial value because it also has excellent resistance to deterioration by moisture and heat, i.e., high hydrolytic stability. A door for a conditioner is also described which comprises a substrate having provided on at least one surface thereof a sealant layer which comprises the polyurethane foam for sealant.

REFERENCES:
patent: 4146687 (1979-03-01), Reale
patent: 4156759 (1979-05-01), Hostettler
patent: 4226947 (1980-10-01), Yukuta et al.
patent: 4242463 (1980-12-01), Sanok et al.
patent: 5077321 (1991-12-01), Michaelis et al.

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