Patient Support Formed From An Elastomeric Composition Including A Polymer Blend Of Seeps Copolymers

Patent metadata

Field	Value
Publication number	US-2020181384-A1
Application number	US-201916705883-A
Country	US
Kind code	A1
Filing date	Dec 6, 2019
Priority date	Dec 11, 2018
Publication date	Jun 11, 2020
Grant date	—

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 . An elastomeric composition for use in a lattice of cells of a patient support, said elastomeric composition comprising a polymer blend, said polymer blend consisting essentially of:
from 75 to 95% by weight of a first SEEPS copolymer having a weight average molecular weight of at least 200,000; and from 5 to 25% by weight of a second SEEPS copolymer having a weight average molecular weight ranging from 125,000 to 175,000,
wherein the sum of said first SEEPS copolymer and said second SEEPS copolymer in said polymer blend is 100 weight percent.

2 . The elastomeric composition of claim 1 wherein said first SEEPS copolymer has a weight average molecular weight of from 295,000 to 315,000.

3 . The elastomeric composition of claim 1 wherein said first SEEPS copolymer has a weight average molecular weight of about 308,000.

4 . The elastomeric composition of claim 1 wherein said second SEEPS copolymer has a weight average molecular weight of about 150,000.

5 . The elastomeric composition of claim 3 , wherein said second SEEPS copolymer has a weight average molecular weight of about 150,000.

6 . The elastomeric composition of claim 1 , wherein the styrene content of said first SEEPS copolymer is about 30%.

7 . The elastomeric composition of claim 1 , wherein the styrene content of said second SEEPS copolymer is about 32%.

8 . The elastomeric composition of claim 1 , wherein said polymer blend consists essentially of 85% by weight of said first SEEPS copolymer and 15% by weight of said second SEEPS copolymer.

9 . The elastomeric composition of claim 5 , wherein said polymer blend consists essentially of 85% by weight of said first SEEPS copolymer and 15% by weight of said second SEEPS copolymer.

10 . The elastomeric composition of claim 1 , 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.

11 . The elastomeric composition of claim 1 having an indention force deflection of from 15 to 60 pounds as measured in accordance with ASTM D3574 B1 when said elastomeric composition is compressed to about 50% of its initial thickness.

12 . The elastomeric composition of claim 1 having an indention force deflection of from 20 to 30 pounds as measured in accordance with ASTM D3574 B1 when said elastomeric composition is compressed to about 50% of its initial thickness.

13 . A patient support for supporting a patient, the patient support comprising:
a crib assembly comprising a lattice of cells formed from an elastomeric composition, said elastomeric composition comprising a polymer blend, said polymer blend consisting essentially of: from 75 to 95% by weight of a first SEEPS copolymer having a weight average molecular weight of weight of at least 200,000; and from 5 to 25% by weight of a second SEEPS copolymer having a weight average molecular weight ranging from 125,000 to 175,000, wherein the sum of said first SEEPS copolymer and said second SEEPS copolymer in said polymer blend is 100 weight percent.

14 . The patient support of claim 13 , wherein said first SEEPS copolymer has a weight average molecular weight of about 308,000 and said second SEEPS copolymer has a weight average molecular weight of about 150,000.

15 . The patient support of claim 14 , wherein the styrene content of said first SEEPS copolymer is about 30% and wherein the styrene content of said second SEEPS copolymer is about 32%.

16 . The patient support of claim 15 , wherein said polymer blend consists essentially of 85% by weight of said first SEEPS copolymer and 15% by weight of said second SEEPS copolymer.

17 . The patient support of claim 15 , 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.

18 . The patient support of claim 15 , wherein said elastomeric composition has an indention force deflection of from 15 to 60 pounds as measured in accordance with ASTM D3574 B1 when said elastomeric composition is compressed to about 50% of its initial thickness.

19 . The patient support of claim 15 , 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.

20 . An elastomeric composition for use in a lattice of cells of a patient support, said elastomeric composition comprising a polymer blend, said polymer blend consisting essentially of:
from 75 to 95% by weight of a first SEEPS copolymer; and from 5 to 25% by weight of a second SEEPS copolymer having a weight average molecular weight at least 10,000 less than said first SEEPS copolymer,
wherein the sum of said first SEEPS copolymer and said second SEEPS copolymer in said polymer blend is 100 weight percent.

Assignees

• Stryker Corp

Inventors

• Lafleche Patrick
• Galer James K
• Ward Matthew

Classifications

• C08L53/025 Primary

  modified · CPC title

• A61G7/015

  divided into different adjustable sections, e.g. for Gatch position · CPC title

• A61G7/05723

  with cut-outs or depressions in order to relieve the pressure on a part of the body (mattresses with cavities A47C27/142) · CPC title

• A61G2203/74

  for anti-shear when adjusting furniture · CPC title

• A61G7/012

  raising or lowering of the whole mattress frame (A61G7/005, A61G7/008 take precedence) · CPC title