Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1975-05-29
1977-08-02
Jacobs, Lewis T.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
156331, 260 775AM, 428425, C08G 1806
Patent
active
040395170
ABSTRACT:
A hydrophilic and thermoreactive urethane composition having improved properties such as stability in solution, non-tackiness, water resistance and strength and useful in treating and finishing fibrous products prepared by forming a urethane prepolymer containing free isocyanate groups from (a) (1) a compound containing at least 2 active hydrogen atoms, containing an oxyethylene chain, and having a molecular weight of about 200 to 20,000, or (2) a compound containing at least 2 active hydrogen atoms, not containing an oxyethylene chain, and having a molecular weight of about 200 to 20,000 and a compound containing at least 2 active hydrogen atoms, containing an oxyethylene chain and having a molecular weight of about 200 to 200,000; and (b) an excess of a polyisocyanate; and if desired, (c) a chain extender containing at least 2 active hydrogen atoms; whereby the prepolymer has an oxyethylene chain content of 10 to 40% by weight, and then reacting the prepolymer or a solution thereof with not more than 3 times the equivalent of the free isocyanate groups in the prepolymer of an aqueous solution of a bisulfite salt having a concentration of at least 15% by weight. Where the urethane prepolymer contains at least 1% by weight ester groups, the hydrophilic and thermoreactive urethane composition is particularly valuable as a high strength adhesive composition and is useful as an adhesive in bonding a sheet-like material as a top-coat to a fabric as a base in producing an artificial leather.
REFERENCES:
patent: 2746988 (1956-05-01), Doser
patent: 3438940 (1969-04-01), Keberle et al.
patent: 3898197 (1975-08-01), Guise et al.
Goto Sumio
Hamamura Tamotu
Ishihara Kazuhiko
Dai-Ichi Kogyo Seiyaku Co. Ltd.
Jacobs Lewis T.
LandOfFree
Hydrophilic and thermoreactive urethane compositions with improv does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydrophilic and thermoreactive urethane compositions with improv, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrophilic and thermoreactive urethane compositions with improv will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2297929