Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1985-02-08
1987-03-24
Cockeram, Herbert S.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
252182, 524762, 524923, 528 75, C08G 1814, C08G 1863, C09K 300
Patent
active
046525890
ABSTRACT:
A normally liquid, stable polymer/polyol composition which imparts improved combustion resistance to polyurethane foams prepared therefrom while retaining satisfactory foam tensile properties are formed by polymerizing in the presence of a free radical catalyst and in the essential absence of an alkyl mercaptan, (1) from about 25 to about 60 weight percent of an ethylenically unsaturated monomer or monomers, for example, a mixture of acrylonitrile and styrene in a weight ratio respectively of 25:75 to 0:100, dissolved or dispersed in (2) from about 40 to about 75 weight percent of a polyol comprising a base polyol having a hydroxyl number of less than about 150, wherein the polymer is characterized by a crosslinking coefficient of less than 55 and an intrinsic viscosity of at least 0.30.
A process for treating the resulting polymer/polyol composition to reduce the product viscosity to essentially the indigenous system viscosity in polymer/polyol compositions of this type is disclosed, as is a stabilizer precursor which assists in stabilizing the resulting polymer/polyol compositions.
REFERENCES:
patent: Re28715 (1976-02-01), Stamberger
patent: Re29014 (1976-10-01), Pizzini et al.
patent: 3304273 (1967-02-01), Stamberger
patent: 3652639 (1972-03-01), Pizzini et al.
patent: 3655553 (1972-04-01), DeWald
patent: 3823201 (1974-07-01), Pizzini et al.
patent: 3850861 (1974-11-01), Fabris et al.
patent: 3875258 (1975-04-01), Patton, Jr. et al.
patent: 3931092 (1976-01-01), Ramlow et al.
patent: 3953393 (1976-04-01), Ramlow et al.
patent: 4014846 (1977-03-01), Ramlow et al.
patent: 4119586 (1978-10-01), Shah
patent: 4144840 (1979-03-01), Bubien
patent: 4148840 (1979-04-01), Shah
patent: 4172825 (1979-10-01), Shook et al.
patent: 4208314 (1980-06-01), Priest et al.
patent: 4230823 (1980-10-01), Alberts et al.
patent: 4242249 (1980-12-01), VanCleve et al.
patent: 4272619 (1981-06-01), Balle et al.
patent: 4357430 (1982-11-01), VanCleve
patent: 4454255 (1984-06-01), Ramlow et al.
patent: 4458038 (1984-07-01), Ramlow et al.
patent: 4460715 (1984-07-01), Hoffman et al.
patent: 4463107 (1984-07-01), Simroth et al.
Critchfield Frank E.
Myerly Richard C.
Simroth Donald W.
Cockeram Herbert S.
Leuzzi, II Paul W.
Union Carbide Corporation
LandOfFree
Polymer/polyols having improved combustion resistance and intrin does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polymer/polyols having improved combustion resistance and intrin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polymer/polyols having improved combustion resistance and intrin will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1354258