Prepolymer compositions for insulating foams
AssigneeRathor AG
InventorsMathias Pauls, Rene Schumacher
Life of this patent
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Abstract
A prepolymer composition for producing polyurethane insulating foams from pressure tanks which consists of a prepolymer component with at least one PU prepolymer with a content of NCO groups of 4 to 20 wt % and usual additives, as well as a propellant component, wherein a polyisocyanate with a content of less than 2 wt %, based on the prepolymer component, of monomeric isocyanate is used.
Claims21
A prepolymer composition for producing polyurethane insulating foams from pressure tanks, which composition comprises:
- a prepolymer component with at least one polyurethane (PU) prepolymer having a content of NCO groups of 4 to 20 wt % and additives, and a propellant component, wherein said at least one PU prepolymer comprises a polyisocyanate with a content of less than 2 wt %, based on the prepolymer component of monomeric polyisocyanate
- wherein said prepolymer composition comprises at least one polyurethane prepolymer made from tolylene diisocyanate (TDI)
- wherein the PU prepolymer has an initial service viscosity at 20° C. of 5,000 to 20,000 mPa.s.
A prepolymer composition for producing polyurethane insulating foams from pressure tanks, which composition comprises:
- a prepolymer component with at least one polyurethane (PU) prepolymer having a content of NCO groups of 4 to 20 wt % and additives, and a propellant component, wherein said at least one PU prepolymer comprises a polyisocyanate with a content of less than 2 wt %, based on the prepolyiner component of monomeric polyisocyanate
- wherein said prepolymer composition comprises at least one polyurethane prepolymer selected from hexamethylene diisocyanate, naphthalene-1,5-diisocyanate, tolylene diisocyanate or isophorone diisocyanate, diphenylmethane diisocyanate, or combinations of these prepolymers;
- and
- wherein the prepolymer composition has a content of liquid polybutadiene of 0.02 to 1 wt %.
A prepolymer composition for producing polyurethane insulating foams from pressure tanks, which composition comprises:
- a prepolymer component with at least one polyurethane (PU) prepolymer having a content of NCO groups of 4 to 20 wt % and additives, and a propellant component, wherein said at least one PU prepolymer comprises a polyisocyanate with a content of less than 2 wt %, based on the prepolymer component of monomeric polyisocyanate
- wherein said prepolymer composition comprises at least one polyurethane prepolymer selected from hexamethylene diisocyanate, naphthalene-1,5-diisocyanate, tolylene diisocyanate or isophorone diisocyanate, diphenylmethane diisocyanate, or combinations of these prepolymers,
- wherein the prepolymer composition has a content of liquid polybutadiene of 0.02 to 1 wt %, and wherein the liquid polybutadiene contains about 75%, 1,4-cis doublebonds, about 24% 1,4-trans double bonds and about 1% vinyl double bonds, has a molecular weight, determined by vaporpressure osmosis, of about 3000 and a viscosity at 20° C. of about 3000 mPa.s.
A prepolymer composition for producing polyurethane insulating foams from pressure tanks, which composition comprises:
- a prepolymer component with at least one polyurethane (PU) prepolymer having a content of NCO groups of 4 to 20 wt % and additives, and a propellant component, wherein said at least one PU prepolymer comprises a polyisocyanate with a content of less than 2 wt %, based on the prepolymer component of monomeric polyisocyanate,
- wherein said prepolymer composition comprises at least one polyurethane prepolymer selected from the group consisting of hexamethylene diisocynate, tolylene diisocyanate, isophorone diisocyanate, and combinations of these prepolymers,
- wherein the composition comprises a polyurethane (PU) prepolymer of aliphatic or aromatic polyisocyanates and aliphatic or aromatic polyetherols,
- wherein the content of additive liquid polybutadiene is between about 0.02 and 1 wt %.
A prepolymer composition for producing polyurethane insulating foams from pressure tanks, which composition comprises:
- a prepolymer component with at least one polyurethane (PU) prepolymer having a content of NCO groups of 4 to 20 wt % and additives, and a propellant component, wherein said at least one PU prepolymer comprises a polyisocyanate with a content of less than 2 wt %, based on the prepolymer component of monomeric polyisocyanate,
- wherein said prepolymer composition comprises at least one polyurethane prepolymer made from tolylene diisocyanate
- wherein the content of additive liquid polybutadiene is between about 0.02 and 1 wt % said prepolymer characterized by an initial service viscosity of the PU prepolymer at 20° C. of 5000 to 20,000 mPa.
Dependencies are inferred from the claim text.