Protective articles comprising an adhesive and cohesive thermoset viscoelastic polymer
AssigneeUniversal Tech Corporation
InventorsMatthew Wayne Kriesel, Troy Bradley Goodenough
Life of this patent
Estimating the term…
Abstract
A viscoelastic material comprises a unique adhesive and cohesive thermoset viscoelastic polymer coated onto a flexible substrate. The polymer can be formed by curing an uncured polymer mix derived from a thermosetting reaction media of a carefully balanced ratio of isocyanate prepolymer, polyether diols, polyether triols and organic plasticizers. The viscoelastic material can exhibit viscoelastic, adhesive, cohesive, releasability, cleansability and antimicrobial properties. In some aspects, the viscoelastic material can be fabricated into a personal protective article. In one embodiment, the personal protective article is a footwear cover.
Claims31
A viscoelastic material comprising a flexible substrate and an adhesive and cohesive thermoset viscoelastic polymer, wherein the adhesive and cohesive thermoset viscoelastic polymer comprises:
- A. about 4 wt % to about 8 wt % isocyanate prepolymer;
- B. about 35 wt % to about 55 wt % polyols having repetitive ether groups;
- and
- C. about 20 wt % to about 60 wt % plasticizer;
- wherein the polyols comprise 0 wt % to about 20 wt % straight chain linking diols by weight of the polymer and about 10 wt % to about 50 wt % cross-linking triols by weight of the polymer;
- wherein the plasticizer comprises less than 45 wt % triglyceride plasticizer by weight of the polymer;
- wherein the adhesive and cohesive thermoset viscoelastic polymer prevents plasticizer leakage;
- and
- wherein the adhesive and cohesive thermoset viscoelastic polymer leaves substantially no residue upon its release from a surface upon which it comes into contact.
A footwear cover comprising a viscoelastic material, wherein the viscoelastic material comprises an adhesive and cohesive thermoset viscoelastic polymer coated onto a flexible substrate;
- wherein the flexible substrate comprises a nonwoven fabric;
- wherein the adhesive and cohesive thermoset viscoelastic polymer comprises:
- A. about 4 wt % to about 8 wt % methylene diphenyl diisocyanate prepolymer;
- B. 0 wt % to about 20 wt % polyether diol;
- C. about 10 wt % to about 50 wt % polyether triol;
- D. about 20 wt % to less than 45 wt % epoxidized soybean oil;
- and
- E. 0 wt % to about 40 wt % dibutyl sebacate;
- wherein the adhesive and cohesive thermoset viscoelastic polymer prevents plasticizer leakage;
- and
- wherein the adhesive and cohesive thermoset viscoelastic polymer leaves substantially no residue upon its release from a surface upon which it comes into contact.
A method for making a viscoelastic material comprising:
- A. providing a flexible substrate;
- B. providing a thermosetting reaction media comprising:
- i. about 4 wt % to about 8 wt % diisocyanate prepolymer;
- ii. about 35 wt % to about 55 wt % polyols comprising:
- a) 0 wt % to about 20 wt % polyether diol by weight of the reaction media, and
- b) about 10 wt % to about 50 wt % polyether triol by weight of the reaction media;
- and
- iii. about 20 wt % to about 60 wt % plasticizer comprising:
- a) about 20 wt % to less than 45 wt % epoxidized triglyceride plasticizer by weight of the reaction media;
- and
- b) 0 wt % to about 40 wt % dialkyl ester plasticizer by weight of the reaction media;
- C. mixing the thermosetting reaction media to form a polymer mix;
- D. applying the polymer mix onto the flexible substrate to form a polymer mix coating;
- and
- E. allowing the polymer mix coating to fully cure to form an adhesive and cohesive thermoset viscoelastic polymer;
- wherein the adhesive and cohesive thermoset viscoelastic polymer prevents plasticizer leakage;
- and
- wherein the adhesive and cohesive thermoset viscoelastic polymer leaves substantially no residue upon its release from a surface upon which it comes into contact.
A method for making an adhesive and cohesive personal protective article comprising:
- A. providing an uncoated personal protective article comprising a flexible substrate;
- B. providing a thermosetting reaction media comprising:
- i. about 4 wt % to about 8 wt % diisocyanate prepolymer;
- ii. about 35 wt % to about 55 wt % polyols comprising:
- a) 0 wt % to about 20 wt % polyether diol by weight of the reaction media, and
- b) about 10 wt % to about 50 wt % polyether triol by weight of the reaction media;
- and
- iii. about 20 wt % to about 60 wt % plasticizer comprising:
- a) about 20 wt % to less than 45 wt % epoxidized vegetable oil by weight of the reaction media;
- and
- b) 0 wt % to about 40 wt % dialkyl ester plasticizer by weight of the reaction media;
- C. mixing the thermosetting reaction media to form a polymer mix;
- D. applying the polymer mix onto the flexible substrate of the uncoated personal protective article to form a polymer mix coating;
- and
- E. allowing the polymer mix coating to fully cure to form an adhesive and cohesive thermoset viscoelastic polymer;
- wherein the adhesive and cohesive thermoset viscoelastic polymer prevents plasticizer leakage;
- and
- wherein the adhesive and cohesive thermoset viscoelastic polymer leaves substantially no residue upon its release from a surface upon which it comes into contact.
Dependencies are inferred from the claim text.