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US 12,668,695 B2Granted
Polymer blends and method for making the same
OwnerAires Mauro De Freitasinventor
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Abstract
The present invention pertains to solid polymer blends obtainable from starting materials comprising glycerine, an ABS polymer, a PBT polymer, a PET polymer, and optionally polymer additives. Further, the present invention pertains to particles of the polymer blend and their use for the manufacture of polyurethanes, in particular, polyurethane foams.
Claims20
A solid polymer blend product obtainable by a process consisting of the following steps:
- a) providing a mixture comprising:
- 0.5 to 7 percent by weight of glycerine;
- 5 to 25 percent by weight of an ABS (acrylonitrile-butadiene-styrene) copolymer;
- 5 to 25 percent by weight of a PBT (polybutylene terephthalate) polymer;
- 48 to 89.5 percent by weight of a PET (polyethylene terephthalate) polymer;
- and
- 0 to 5 percent by weight of polymer additives;
- wherein the sum of the amounts of the components listed above is 100 percent by weight;
- b) subjecting the mixture from step (a) to an extrusion process at elevated temperatures;
- c) cooling and granulating the product from step (b) into a granulate;
- and
- optionally
- d) subjecting the granulate from step (c) to a milling step to obtain the product in the form of particles having a mean average particle size of from 0.1 μm to 200 μm.
10 more elements
Dependencies are inferred from the claim text.