Back to results
US 9,309,439 B2Granted
Sealant and adhesive using green prepolymer
AssigneeConstruction Research & Technology GmbH
InventorsJyothi Thazhakuzhy Varkey, Jayesh Neginbhai-Patel, Robert Louis Ferenz, Patrick Knoll
Life of this patent
Estimating the term…
Abstract
A polyurethane prepolymer comprising the reaction product of a reactant formulation comprising a polyol entirely derived from a natural oil; a natural oil-petroleum blend polyol; an isocyanate, at least one catalyst, drying agent, and plasticizer, wherein the prepolymer has a bio-based content of from about 15% to about 75% by weight. The prepolymer may be used in adhesive, or sealant compositions.
Claims21
A polyurethane prepolymer comprising:
- the reaction product of a reactant formulation comprising:
- a. a polyol entirely derived from a natural oil;
- b. a natural oil-petroleum blend polyol;
- c. an isocyanate,
- d. at least one catalyst,
- e. drying agent, and
- f. plasticizer,
- wherein the prepolymer has a bio-based content of from about 15% to about 75% by weight.
5 more elements
A method for making a polyurethane prepolymer comprising reacting:
- a. a polyol entirely derived from a natural oil;
- b. a natural oil-petroleum blend polyol;
- c. an isocyanate;
- d. at least one catalyst;
- e. plasticizer;
- and
- f. drying agent
- for a sufficient time to produce a polyurethane prepolymer,
- wherein the prepolymer has a bio-based content of from about 15% to about 75% by weight.
6 more elements
Dependencies are inferred from the claim text.