Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Patent
1995-05-25
1997-02-04
Gorr, Rachel
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
528 49, 528 67, 528 76, 528 80, 528905, 525440, 524 77, 36 195, 156320, 1563244, 1563317, 25218222, C08G 1812
Patent
active
055998950
DESCRIPTION:
BRIEF SUMMARY
The present application was filed under the provisions of 35 USC 371 as the U.S. National Phase of PCT/EP93/03216 filed Nov. 16, 1993.
BACKGROUND OF THE INVENTION
This invention relates to a moisture-curing hot-melt adhesive, its production and its use in the shoe industry.
DISCUSSION OF RELATED ART
A "moisture-curing polyurethane hot-melt adhesive" is understood to be an adhesive largely free of solvents and having urethane groups, which is solid at room temperature and following application in the form of its melt physically binds not only by cooling but also by chemical reaction of still present isocyanate groups with moisture. It is only subsequent to such chemical curing with increase in molecule size that the adhesive receives its final characteristics.
FIELD OF THE INVENTION
Such moisture-curing polyurethane hot-melt adhesives are known for various substrates:
EP 0,421,154 describes a rapidly crystallizing polyurethane system containing isocyanate groups which is based on a polyester diol A having a melting point of from 30.degree. to 60.degree. C. and a polyester diol B having a melting point of from 65.degree. to 150.degree. C. and a polyisocyanate D. In addition, it may contain a diol C having a molecular weight of <400 as a chain extender. The polyurethane system may be directly prepared from these components in a single step but multiple steps are possible as well. The thus obtained polyurethane system is partially crystalline and is intended to be used as an assembly adhesive but specifically, as a book-binding adhesive.
DE 3,236,313 describes a hot-melt adhesive which consists of from 20 to 90% by weight of a prepolymeric isocyanate and from 5 to 50% by weight of a low molecular weight ketone resin and, in addition, may contain from 0 to 75% by weight of a thermoplastic polyurethane. The prepolymeric isocyanate is a reactive polyurethane prepolymer of
1. an aromatic diisocyanate and/or
2. a prepolymer of said isocyanate, and of
3. a polyether or a polyester having OH groups, and
4. a short-chain diol.
In the only preparative example, there is added in addition to 516 g of a polyester diol another 74 g of tripropylene glycol as a chain extender. The prepolymer is prepared from the components in a single step and has a viscosity of from 50 to 40,000 Pa.s at 20.degree. C. The hot-melt adhesive is suitable for bonding thermoplastic and thermosetting adhesives, foamed material, lacquered surfaces, wood and wooden materials, paper, leather, artificial leather, rubber, textiles, non-woven materials, and metals.
EP 0,340,906 describes a polyurethane hot-melt adhesive containing a mixture of at least two amorphous polyurethane prepolymers conferring different glass transition temperatures to the hot-melt adhesive which are above and below room temperature, respectively. The prepolymers are prepared from polyisocyanates and various diols, namely, preferably polyester diols on the one hand and, preferably polyester, polyether and other polymer diols on the other hand. The hot-melt adhesive is prepared by either mixing the individually prepared prepolymers or by preparing the second prepolymer in the first. As a rule, there are obtained opaque hot-melt adhesives at room temperature which, according to the example, have a viscosity of 91 Pa.s at 130.degree. C. The polyurethane hot-melt adhesive is used for wood bonding.
EP 0,369,607 describes a moisture-curing polyurethane hot-melt adhesive containing at least two polyurethane prepolymers, wherein the first prepolymer has a glass transition temperature of above room temperature and the second prepolymer has a glass transition temperature below same. The hot-melt adhesive is prepared from polyisocyanate and various diols, namely, from a polyether diol on the one hand, and a polyether, polyester or polybutadiene diol on the other hand. Example III contains 8.5% by weight of a polyester diol. It is indicated that the polyurethane hot-melt adhesive may be prepared in a single or in multiple steps. As a rule, it is transparent at room temperature a
REFERENCES:
patent: 3012987 (1961-12-01), Ansul
patent: 3094495 (1963-06-01), Gemeinhardt
patent: 3271352 (1966-09-01), Weinberg
patent: 3428609 (1969-02-01), Chilvers et al.
patent: 3509232 (1970-04-01), Schoffenberger
patent: 3514427 (1970-05-01), Owens
patent: 3691117 (1972-09-01), Messerly
patent: 3705132 (1972-12-01), Coscurida
patent: 3730927 (1973-05-01), Schloss
patent: 3829533 (1974-08-01), Matsui et al.
patent: 4321173 (1982-03-01), Schuhmacher et al.
patent: 4381388 (1983-04-01), Naples
patent: 4403085 (1983-12-01), Christenson et al.
patent: 4552934 (1985-11-01), Rabito
patent: 4561922 (1985-12-01), Peerman et al.
patent: 4585819 (1986-04-01), Reischle et al.
patent: 4623709 (1986-11-01), Bauriedel
patent: 4624996 (1986-11-01), Rizk et al.
patent: 4667661 (1987-05-01), Scholz et al.
patent: 4737566 (1988-04-01), Pedain et al.
patent: 4756785 (1988-07-01), Koenig et al.
patent: 4882408 (1989-11-01), Blum
patent: 4891269 (1990-01-01), Markevka et al.
patent: 4929667 (1990-05-01), Ban et al.
patent: 4946535 (1990-08-01), Meckel
patent: 4957959 (1990-09-01), Matsumoto et al.
patent: 4999407 (1991-03-01), Gilch et al.
patent: 5039573 (1991-08-01), Bravet et al.
patent: 5070114 (1991-12-01), Watts et al.
patent: 5091444 (1992-02-01), Bauer et al.
patent: 5115073 (1992-05-01), Meckel et al.
patent: 5166300 (1992-11-01), Rumon et al.
patent: 5166302 (1992-11-01), Werner et al.
patent: 5173538 (1992-12-01), Gilch et al.
patent: 5190607 (1993-03-01), Werner et al.
Ernest W. Flick, Adhesive and Sealant Compounds and Their Formulations, pp. 313-315, Noyes Data Corporation, Park Ridge, NJ, 1978.
George Woods, "An Introduction to Polyurethanes", The ICI Polyurethanes Book, pp. 1-12, Polyurethanes and John Wiley & Sons, New York, NY 1987.
George Woods, "Polyurethane Adhesives, Binders, Paints, lacquers, Cellular Coatings and Other Materials", The ICI Polyurethanes Book, pp. 197-203, Polyurethanes and John Wiley & Sons, New York, NY 1987.
"Urethane Polymers", Encyclopedia of Chemical Technology, vol. 23, pp. 576-607, John Wiley & Sons, New York, NY, 1983.
"Compatibility", Encyclopedia of Polymer Science & Engineering, vol. 3, pp. 762-765, John Wiley & Sons, New York, NY, 1985.
Ryong,-Joon Roe, "Glass Transition", Encyclopedia of Polymer Science & Engineering, vol. 7, pp. 531-544, John Wiley & Sons, New York, NY, 1987.
"Thermal Analysis", Encyclopedia of Polymer Science & Engineering, Supp. vol., pp. 702-708, ohn Wiley & Sons, New York, NY, 1989.
P. Wright & A. P. C. Cumming, "Thermoplastic Polyurethanes", Solid Polyurethane Elastomers, pp. 179-198, Gordon and Breach Science Publishers, New York, 1969.
"Ethylene Oxide Polymers", Encyclopedia of Chemical Technology, vol. 18, pp. 616-637, John Wiley & Sons, New York, NY, 1982.
J. L. Work, "Dynamic Mechanical Properties of Urea-Ureathane Block Polymers", Polymer Science and Technology, vol. 4, Plenum. 1974.
"Thermal Degradation", Encyclopedia of Polymer Science & Engineering, vol. 4, p. 686, John Wiley & Sons, New York, NY, 1986.
Gorr Rachel
Henkel Kommanditgesellschaft auf Aktien
Jaeschke Wayne C.
Szoke Ernest G.
Wood John Daniel
LandOfFree
Moisture-curing polyurethane hot-melt adhesive does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Moisture-curing polyurethane hot-melt adhesive, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Moisture-curing polyurethane hot-melt adhesive will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-679590