Low viscosity polymer polyols characterized by a high hydroxyl number

a polymer polyol, low viscosity technology, applied in the field of low viscosity polymer polyols, can solve the problems of increasing the solid content of polymer polyols, the inability of polymer polyols derived from such high styrene monomer mixtures to meet ever-increasing market needs, and the inability to meet the needs of ever-increasing market needs, etc., to achieve low viscosity, low hydroxy ratio ratio ratio ratio ratio ratio ratio ratio ratio
US20070060690A1Inactive Publication Date: 2007-03-15BAYER MATERIALSCIENCE AG
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
BAYER MATERIALSCIENCE AG
Publication Date
2007-03-15
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The present invention relates to novel polymer polyols which have low viscosities and high hydroxyl numbers, and to a process for the preparation of these novel polymer polyols. These polymer polyols have hydroxyl numbers of ≧20, solids contents of about 30 to about 65% by weight and a viscosity that is less than or equal to: be[2.7c]. These comprise the reaction product of a base polyol, a preformed stabilizer and at least one ethylenically unsaturated monomer, in the presence of a free-radical polymerization initiator and at least one polymer control agent. The base polyol has a hydroxyl number of 60 to 1900, a functionality of 1 to 10, and an equivalent weight of 30 to 900.
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Description

BACKGROUND OF THE INVENTION

[0001] The present invention relates to low viscosity polymer polyols that have a high hydroxyl number and a solids content of about 30 to about 65% by weight. This invention also relates to a process for the preparation of these novel polymer polyols. These polymer polyols have hydroxyl numbers of ≧20, solids contents of about 30 to about 65% by weight and a viscosity that is less than or equal to: be[2.7c]. These comprise the reaction product of a base polyol, a preformed stabilizer and at least one ethylenically unsaturated monomer, in the presence of a free-radical polymerization initiator and at least one polymer control agent.

[0002] Polymer polyol compositions are commercial products that have found use in a variety of applications primarily as constituents in the production of polyurethanes. Polyurethanes are suitable for the production of coatings, adhesives, sealants, elastomers, and flexible, semi-flexible and rigid foams. The primary function ...

Claims

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