Flexible polyurethane material

Patent metadata

Field	Value
Publication number	US-RE46761-E
Application number	US-201514689290-A
Country	US
Kind code	E1
Filing date	Apr 17, 2015
Priority date	Apr 22, 1998
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

The present invention provides a flexible two component polyurethane and method for producing the polyurethane. The cured polyurethane is flexible, durable and weather resistant. The polyurethane is suitable for use as a protective layer on various substrates. The flexible polyurethane is the reaction product of solvent-free reaction components. The first component includes one or more polyols, optionally, one or more diols, and a catalyst. The second component includes a primary aliphatic isocyante crosslinker.

First claim

What is claimed is:

1. An article comprising:
a) a substrate selected from polymeric material, wood, fabric, reinforced polymers, metal, reflective sheeting, and a combination thereof, wherein the polymeric material or the polymer of the reinforced polymer comprises a polyvinyl chloride, polyester, acrylic polymer, polycarbonate, polyurethane, polyethylene acrylic acid copolymer, or polyvinyl acetate; and
b) a clear polyurethane applied as a protective layer on a first surface of said substrate, said polyurethane is a reaction product of,
i) a first component comprising one or more polyols having an equivalent weight in the range from about 28 to about 3000, optionally one or more diols having an equivalent weight in the range from about 30 to about 4000, and a catalyst; and
ii) a second component comprising at least 50 weight percent of a primary polyisocyanate having a functionality of at least three, and wherein the first and second components together are solvent free, and wherein any isocyanate source in the clear protective polyurethane layer consists of the primary polyisocyanate.

2. An article as recited in claim 1 , wherein an adhesive is applied onto a second surface of said substrate opposite to the first surface of said substrate.

3. An article as recited in claim 1 , further comprising indicia applied onto the first surface of said substrate and covered by said polyurethane.

4. An article as recited in claim 3 , wherein said indicia is three dimensional.

5. An article as recited in claim 3 , wherein said polyurethane layer covers all exposed surfaces of the indicia and the first surface of said substrate.

6. An article as recited in claim 4 , wherein said three dimensional indicia comprises a cured polyurethane body having a mounting surface, a tie layer bonded to the mounting surface, and an adhesive body adhered to the tie layer.

7. An article as recited in claim 1 , wherein said substrate is a base substrate and one or more secondary articles are applied over said base substrate, each of said secondary articles comprising an adhesive attachment system, a substrate, and indicia.

8. An article as recited in claim 7 , wherein said base substrate includes indicia and said secondary articles are applied over the indicia of said base substrate.

9. An article as recited in claim 7 , wherein said one or more secondary articles include three dimensional articles.

10. An article as recited in claim 1 , wherein said catalyst is a tin-based catalyst and said polyurethane, upon exposure to moisture or carboxyl groups, does not exhibit a substantial amount of outgassing.

11. An article as recited in claim 1 , wherein the second component further comprises one or more monomeric isocyanates.

12. An article as recited in claim 1 , wherein the first and second components form a solvent-free admixture having an NCO:OH ratio of about 0.75 to about 1.25.

13. An article as recited in claim 1 , wherein the polyurethane contains up to about 20 weight percent of polyether segments.

14. An article comprising:
a) a substrate selected from polymeric material, wood, fabric, reinforced polymers, metal, reflective sheeting, and a combination thereof, wherein the polymeric material or the polymer of the reinforced polymer comprises a polyvinyl chloride, polyester, acrylic polymer, polycarbonate, polyurethane, polyethylene acrylic acid copolymer, or polyvinyl acetate; and
b) a clear protective polyurethane layer on directly contacting a first surface of the substrate, wherein the clear protective polyurethane layer contains primary aliphatic isocyanate crosslinking, and wherein about 25% or more of the total crosslink density is contributed by a polyisocyanate components component having a functionality of at least three, said clear protective polyurethane layer exhibiting at least one property selected from the group consisting of a flexural modulus of 1.0×108 1.0×10 8 pascals or less, a storage modulus of 1.0×108 1.0×10 8 pascals or less, a Shore A hardness of less than 94, a Hoffman scratch-hardness test result of 2 or less, and a color shift, in accordance with heat aging test ASTM D2244-79, within 1 delta E, wherein the clear protective polyurethane layer comprises a polyester polyurethane, polycarbonate polyurethane, polyacrylate polyurethane, polyalkylene polyurethane, polyether polyurethane, or a combination thereof and wherein any isocyanate source in the clear protective polyurethane layer consists of the polyisocyanate component.

15. An article as recited in claim 14 , wherein the polyurethane is a reaction product of:
(i) a first component comprising one or more polyols having an equivalent weight in the range from about 28 to about 3000, optionally one or more diols having an equivalent weight in the range from about 30 to about 4000, and a catalyst; and
(ii) a second component comprising at least 50 weight percent of a primary polyisocyanate having a functionality of at least three, and wherein the first and second components together are solvent free.

16. An article as recited in claim 14 , further comprising indicia on a portion of the first surface of the substrate, wherein the polyurethane covers all exposed surfaces of the indicia and the first surface of said substrate.

17. An article as recited in claim 14 , further comprising an adhesive layer on a second surface of the substrate, wherein the second surface is opposite the first surface of said substrate.

18. An article comprising:
a) a substrate having a first surface, said substrate selected from polymeric material, wood, fabric, reinforced polymers, metal, reflective sheeting, and a combination thereof, wherein the polymeric material or the polymer of the reinforced polymer comprises a polyvinyl chloride, polyester, acrylic polymer, polycarbonate, polyurethane, polyethylene acrylic acid copolymer, or polyvinyl acetate;
b) indicia on at least a portion of the first surface of the substrate; and
c) a clear polyurethane applied as a protective layer over the indicia and any exposed portions of the first surface of said substrate, wherein the polyurethane is a reaction product of:
i) a first component comprising one or more polyols having an equivalent weight in the range from about 28 to about 3000, optionally one or more diols having an equivalent weight in the range from about 30 to about 4000, and a catalyst; and
ii) a second component comprising at least 50 weight percent of a primary polyisocyanate having a functionality of at least three, and wherein the first and second components together are solvent free;

wherein the first and second components form a solvent-free admixture having an NCO:OH ratio of about 0.75 to about 1.25, and wherein any isocyanate source in the clear protective polyurethane layer consists of the polyisocyanate component.

19. An article as recited in claim 18 , further comprising an adhesive layer on a second surface of the substrate, wherein the second surface is opposite the first surface of said substrate.

20. An article comprising:
a) a substrate selected from polymeric material, wood, fabric, reinforced polymers, metal, reflective sheeting, and a combination thereof, wherein the polymeric material or the polymer of the reinforced polymer comprises a polyvinyl chloride, polyester, acrylic polymer, polycarbonate, polyurethane, polyethylene acrylic acid copolymer, or polyvinyl acetate; and b) a flexible clear polyurethane applied as a layer on a surface of said substrate, said flexible polyurethane comprising a reaction pr

Assignees

• 3M Innovative Properties Co

Inventors

• Ho Charlie Chia-Tie
• Fullbright Jr Clarence

Classifications

• B05C17/015

  with pneumatically {or hydraulically} actuated piston or the like {(B05C17/00543 takes precedence)} · CPC title

• B05C17/00553 Primary

  with means allowing the stock of material to consist of at least two different components · CPC title

• C08G18/4202

  Two or more polyesters of different physical or chemical nature (C08G18/44 takes precedence) · CPC title

• C09D175/06

  from polyesters · CPC title

• B32B7/12 Primary

  using interposed adhesives or interposed materials with bonding properties · CPC title