# US 4,394,462 A · Mixtures of polymers for medical use

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- Number: US 4,394,462 A
- Document ID: US4394462A
- Status: Granted
- Kind: A
- Application number: 06/417,323
- Filed: 1982-09-13
- Granted: 1983-07-19
- Earliest claimed: 1979-12-17
- Assignees: Hospal-Sodip, S.A.
- Inventors: Christian Pusineri; Jean Goletto
- Web page: https://patentgrep.com/patent/US4394462A

## CPC

- C08L 27/06: Homopolymers or copolymers of vinyl chloride
- A61L 29/049: {Mixtures of macromolecular compounds}
- A61L 33/0023: {using a quaternized group or a protonated amine group of the substrate}
- A61L 33/062: {Mixtures of macromolecular compounds}
- C08G 18/0814: {containing ammonium groups or groups forming them}
- C08L 75/12: from compounds containing nitrogen and active hydrogen, the nitrogen atom not being part of an isocyanate group
- C08L 75/08: from polyethers
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

A process for preparing polymers compositions of a mixture of vinyl chloride polymer and polyurethane with tertiary amine and/or ammonium groups.

## Claims

### Claim 1

Process for the preparation of a foamed composition having good compatibility with biological materials consisting of a mixture of vinyl chloride polymer and a polyether-urethane with tertiary amine and/or ammonium groups with the proportion of the polyether-urethane being from 1 to 99 percent by weight, relative to the total mixture, on a blowing agent or a solvent in an inadequate amount to solubilise the total amount of the composition, and in that this paste is then extruded at a temperature below 100.degree. C. to foam said mixture of polymers.