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US 4,240,947 AGranted
Cross-linked elastomeric polyester laticies
AssigneeBorg-Warner Corporation
InventorJohn C. Falk
Life of this patent
Estimating the term…
Abstract
A process for preparing laticies of cross-linked, elastomeric aliphatic polyesters comprising preparing a solution of the polyester in an organic solvent, emulsifying the polyester solution, stripping out the solvent and cross-linking the resulting polyester latex by heating with a peroxide. Upon coagulation, the cross-linked elastomer is obtained as a free-flowing powder.
Claims3
A process for preparing a cross-linked polyester latex consisting of
- A. Preparing a solution comprising from 95 to 80 parts by weight of a water-immiscible organic solvent, from 5 to 20 parts by weight of an aliphatic polyester elastomer and from 0.5 to 5 wt%, based on polyester, of an organic peroxide;
- B. Mixing said solution with an equal volume of water containing from 1 to 10 wt%, based on polyester, of a surfactant;
- C. Passing said mixture through a homogenizer to form an emulsion;
- D. Heating said emulsion to remove said solvent;
- and
- E. Further heating said emulsion to cross-link said polyester.
3 more elements
A cross-linked polyester latex produced by the process consisting of
- A. Preparing a solution comprising from 95 to 80 parts by weight of a water-immiscible organic solvent, from 5 to 20 parts by weight of an aliphatic polyester elastomer and from 0.5 to 5 wt%, based on polyester, of an organic peroxide;
- B. Mixing said solution with an equal volume of water containing from 1 to 10 wt%, based on polyester, of a surfactant;
- C. Passing said mixture through a homogenizer to form an emulsion;
- D. Heating said emulsion to remove said solvent;
- and
- E. Further heating said emulsion to cross-link said polyester.
3 more elements
A powdered, cross-linked polyester produced by the process of
- A. Preparing a solution comprising from 95 to 80 parts by weight of a water-immiscible organic solvent, from 5 to 20 parts by weight of an aliphatic polyester elastomer and from 0.5 to 5 wt%, based on polyester, of an organic peroxide;
- B. Mixing said solution with an equal volume of water containing from 1 to 10 wt%, based on polyester, of a surfactant;
- C. Passing said mixture through a homogenizer to form an emulsion;
- D. Heating said emulsion to remove said solvent;
- E. Further heating said emulsion to cross-link said polyester;
- and
- F. Coagulating said latex and drying the solid, powdery product.
4 more elements
Dependencies are inferred from the claim text.