Patient support formed from an elastomeric composition including a polymer blend of seeps copolymers

Patent metadata

Field	Value
Publication number	US-11560471-B2
Application number	US-201916705883-A
Country	US
Kind code	B2
Filing date	Dec 6, 2019
Priority date	Dec 11, 2018
Publication date	Jan 24, 2023
Grant date	Jan 24, 2023

Abstract

This disclosure provides a person support formed from an elastomeric composition. The elastomeric composition includes a polymer blend with the polymer blend consisting essentially of a first and second SEEPS copolymer. The first and second SEEPS copolymers are present in the polymer blend in an amount of from 75 to 95 percent by weight and 5 to 25 percent by weight, respectively, based on the total weight of the polymer blend. In addition, the sum of the first and second SEEPS copolymers in the polymer blend is 100 percent by weight. The first and second SEEPS copolymers have a weight average molecular weight of weight of at least 200,000 and 125,000 to 175,000, respectively. The disclosure also provides a patient support for supporting a patient with the patient support formed from the elastomeric composition.

First claim

What is claimed is:

1. A patient support for supporting a patient, the patient support comprising:
a crib assembly comprising a lattice of cells formed from an elastomeric composition, with said cells directly abutting adjacent cells, said elastomeric composition comprising a polymer blend, said polymer blend consisting essentially of:
85% by weight of a first SEEPS copolymer having a weight average molecular weight of weight of at least 200,000 g/mol; and
15% by weight of a second SEEPS copolymer having a weight average molecular weight ranging from 125,000 to 175,000 g/mol,
wherein the sum of said first SEEPS copolymer and said second SEEPS copolymer in said polymer blend is 100 weight percent; and
wherein said elastomeric composition further comprises mineral oil, and wherein the weight ratio of mineral oil to polymer blend in said elastomeric composition ranges from 2.7:1 to 2.75:1.

2. The patient support of claim 1 , wherein said first SEEPS copolymer has a weight average molecular weight of about 308,000 g/mol and said second SEEPS copolymer has a weight average molecular weight of about 150,000 g/mol.

3. The patient support of claim 2 , wherein the styrene content of said first SEEPS copolymer is about 30 wt. % and wherein the styrene content of said second SEEPS copolymer is about 32 wt. %.

4. The patient support of claim 3 , wherein said elastomeric composition has an indention force deflection of from 15 to 60 pounds as measured in accordance with ASTM D3574 B 1 when said elastomeric composition is compressed to about 50% of its initial thickness.

5. The patient support of claim 3 , wherein each of said lattice of cells has an indention force deflection of from 20 to 30 pounds as measured in accordance with ASTM D3574 B1 when said cell is compressed to about 50% of its initial thickness.

Assignees

• Stryker Corp

Inventors

• Lafleche Patrick
• Galer James K
• Ward Matthew

Classifications

• C08L25/08 Primary

  Copolymers of styrene (C08L29/08, C08L35/06, C08L55/02 take precedence) · CPC title

• C08L2203/02

  for biomedical use · CPC title

• A61G7/065

  Rests specially adapted therefor · CPC title

• A47C27/06

  Spring inlays or spring units therefor · CPC title

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title