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
1988-03-01
1989-01-10
Welsh, Maurice J.
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 65, 528 66, C08G 1810
Patent
active
047974630
ABSTRACT:
A two-component material based on curable prepolymers and conventional additives is described which, unlike conventional two-component materials, contains hardenable prepolymer in both individual components, the prepolymer in the first component being a polyurethane prepolymer with free NCO-groups and the prepolymer in the second component is a polymer with free SH-groups. The first component contains curing agent and optionally accelerator for the polymer with free SH-groups and the second component contains curing agent and optionally accelerator for the polyurethane prepolymer with free NCO-groups. Through the use of two prepolymers, the two components of the two-component material can be used in a volume ratio favorable for practical purposes. It is also possible to set the viscosity and density of the two individual components to roughly the same values, so that no problems are caused when mixing the two components. The described two-component materials cure very rapidly and are less sensitive to dosing and mixing errors. In addition, the described two-component materials give high strength values for a given elasticity in the cured state. The described two-component materials are particularly suitable as sealants, adhesives, coating materials and moulding compounds.
REFERENCES:
patent: 3923748 (1975-12-01), Hutt et al.
Grimm Stefan
Schatzle Michael
Stahr Fritz
Fabiano Vincent L.
McDowell, Jr. W. W.
Teroson GmbH
Welsh Maurice J.
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