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US 12,583,993 B2Granted
Recycled polyol
AssigneeH & S Anlagentechnik GmbH
InventorsValentin Stoychev, Marin Boyadzhiev
Life of this patent
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Abstract
The invention relates to a polyol displaying specific properties which allow it to be identified accessibly as a recycled polyol, particularly as a recycled polyol obtained from a new specific recycling process.
Claims19
A polyol mixture having the following product properties:
- hydroxyl number:
- from 35 to 650 mg KOH/g
- amine number:
- from 1 to 40 mg KOH/g
- acid number:
- from 0.1 to 20 mg KOH/g
- viscosity:
- from 800 to 50 000 mPa*s at 25° C.;
- wherein the polyol mixture comprises at least two compounds selected from the group consisting of calcium carbonate, styrene-acrylonitrile copolymers (SAN), polyisocyanate polyaddition polyols (PIPA), polyurea dispersion polyol (PHD) and melamine;
- and
- wherein the polyol mixture comprises ≥5 different pigments;
- and
- wherein a range of 1% to 10% by weight of polyols in the polyol mixture has a molar mass in a range of 75 g/mol to 106 g/mol and/or in a range of >106 g/mol to 200 g/mol.
10 more elements
Dependencies are inferred from the claim text.