Viscoelastic polyurethanes

Details Viscoelastic polyurethanes Viscoelastic polyurethanes

Filed on

2006-04-04

Date issued

2006-04-04

Examiner

Gorr, Rachel (Department: 1711)

Patent Class

Synthetic resins or natural rubbers -- part of the class 520 ser

SubClass

Synthetic resins

SubSubClass

Cellular products or processes of preparing a cellular...

Other Related Categories

C521S914000, C528S174000

Type

Reexamination Certificate

Status

active

Patent number

07022746

Description

ABSTRACT:
Viscoelastic foams and elastomers based on a reaction system comprising a monomeric polyisocyanate composition, a specified mixture of polyols, and a specified package of additives. The viscoelastic materials offer superior combinations of physical properties, including surprisingly low compression sets. Very soft viscoelastic foams and microcellular elastomers can be conveniently prepared from the reaction system without the necessity of using plasticizers. The reaction system can be processed into useful polymeric articles using a wide range of conventional polyurethane processing methods.

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