METHOD FOR MAINTAINING THE NORMAL INTEGRITY OF BLOOD

• US 3,839,743 A
• Filed: 10/15/1973
• Issued: 10/08/1974
• Est. Priority Date: 04/21/1972
• Status: Expired due to Term

• Current Assignee: Andor Schwarcz
• Original Assignee: Andor Schwarcz
• Inventors: Schwarcz, Andor
• Primary Examiner(s): Gaudet, Richard A.
• Assistant Examiner(s): Frinks, Ronald L.
• Application Number:
  US05/406,547
• Time in Patent Office: 358 Days
• Field of Search: 3/1,DIG.1-DIG.,,36 128/214R,214D,334R,348,349R,35R,335.5,303 117/124R,138.8A,124D,124E
• US Class Current: 424/422
• CPC Class Codes: A61F 2/0077 Special surfaces of prostheses, e.g. for improving ingrowth A61F2/30767 takes precedence
• CPC Class Codes: A61F 2/06 Blood vessels
• CPC Class Codes: A61K 6/884 comprising natural or synthetic resins
• CPC Class Codes: A61K 6/887 Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: A61L 33/066 Rubbers
• CPC Class Codes: Y10T 428/3154 Of fluorinated addition polymer from unsaturated monomers

Abstract

Thromboresistant biomedical articles are provided which are useful in the fields of subdermal surgical implants, laboratory apparatus and blood containers. These articles have at least a thin surface coating of an organic polymeric material having fluoroalkyl side chains and simple anionic side groups.

Claims

1. A METHOD OR MAINTAINING THE NORMAL INTEGRITY OF BLOOD WHICH COMPRISES PLACING IT IN CONTACT WITH A PHYSIOLOGICALLY ACCEPTABLE ARTICLE AT LEAST THE SURFACE OF WHICH CONSISTS OF AN ORGANIC POLYMERIC MATERIAL HAING FLUOROALKYL SIDE CHAINS OF THE FORMULA CNF2N+1CMH2M-, WHHEREIN N AND M ARE INTEGERS, N RANGING 1 TO 28, AND THE SUM OF N AND M FROM 2 TO 28, THE NUMBER OF SAID FLUOROALKYL SIDE CHAINS RELATIVE TO THE NUMBER OF MAIN CHAIN ATOMS IN ONE RECURRING UNIT RANGES FROM 1:

2 TO 1;

10, AND SAID POLYMERIC MATERIAL HAVING ANOTHER SIDE GROUP CHEMICALLY BONDED TO THE MAIN CHAIN, SAID SIDE GROUP BEING SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, HALOGEN, ARYL, LOWER ALKYL AND ANIONIC GROUPS.

2. The method defined in claim 1 wherein the said fluoroalkyl side chains are linear, the said integers n and m range from 8 to 28 and the sum of n and m from 8 to 28.

3. The method defined in claim 1 wherein the said integer n ranges from 1 to 7, the sum of n and m from 2 to 28 and the said side group is an anionic group.

4. The method defined in claim 1 wherein said physiological acceptable article comprises a substrate portion and a surface coating portion, said surface coating portion at least being of said polymeric material defined in claim 1.

5. The method defined in claim 1 wherein the said anionic group is a member selected from the group consisting of the acid form of a carboxylate, sulfonate, sulfate, phosphate, phosphite and the salt forms of these groups.

6. The method defined in claim 1 wherein the ratio of the number of said fluoroalkyl side chains to the number of said anions is in the range of 1:

1 to 20;

1.

7. The method defined in laim 1 wherein the said fluoroalkyl side chain is bonded to the main chain of the said organic polymeric material by an intermediate divaLent radical.

8. The method defined in claim 1 wherein the said anionic group is bonded to the said organic polymeric material by an intermediate divalent radical.

9. The method defined in claim 7 wherein the said intermediate divalent radical is a member selected from the group consisting of -O-, -CO-, -SO-, -SO2-, -SO2NH-, -CH2O-, -COO-, -NHCO-, -NHCONH-, -POCH3-, -POC2H5-, -SO2NCH3-, -SO2NC2H5-.

10. The method defined in claim 8 wherein the said intermediate divalent radical is a member selected from the group consisting of -CH2-, -C2H4-, -OC2H4-, -(CH2)8-, -(CF2)15-, -SO2NHChd 2H4-.

11. The method defined in claim 1 wherein said physiologically acceptable article is a subdermal surgical implant.

12. The method defined in claim 1 wherein said physiologically acceptable article is a surgical instrument.

13. The method defined in claim 1 wherein said physiologically acceptable article is a laboratory apparatus used for handling blood.

14. The method defined in claim 1 wherein said physiologically acceptable article is a blood container.

15. The method defined in claim 4 wherein the said substrate portion is selected from the group consisting of plastics, rubbers, metals, glass and ceramics.

16. The method defined in claim 1 wherein said organic polymeric material is selected from the group consisting of copolymers prepared from a fluoroalkyl acrylate and acrylic acid, a fluoroalkyl methacrylate and methacrylic acid and the mixtures of these monomers.

17. The method defined in claim 16 wherein said polymeric acrylates are selected from the group consisting of:

poly(1,1- dihydropentacosafluorotridecyl acrylate) poly(1,1-dihydropentatetracontafluorotricosyl methacrylate) polyco(1,1-dihydropentadecafluorooctyl methacrylate - 10% sodium acrylate) polyco(1,1,2,2-tetrahydrotrifluoropropyl acrylate - 5% maleic acid) polyco(1,1,2,2-tetrahydropentadecafluorononyl acrylate - 30% methacrylic acid - 15% sodium methacrylate)

18. The method defined in claim 1 wherein said organic polymeric material is selected from the group consisting of:

poly(methyl-1,1,2,2-tetrahydrotriacontafluorooctadecyl siloxane) poly(di(1,1,2,2-tetrahydrotricosafluorotridecyl) siloxane). poly(carboxyethyl-1,1,2,2-tetrahydrotrifluoropropyl siloxane) and poly(methyl-3,3,3- trifluoropropyl siloxane) wherein a minor part of the methyl groups is replaced with carboxyethyl groups.

19. The method defined in claim 1 wherein said organic polymeric material is selected from the group consisting of:

polymers of fluoroalkyl esters, amides and imides of maleic and fumaric acids, the copolymers with ethylene, styrene, methylvinyl ether and vinyl acetate of fluoroalkyl esters, amides and imides of maleic and fumaric acids, the copolymers with maleic, fumaric and acrylic acids and their anhydrides of fluoroalkyl esters, amides and imides of maleic and fumaric acids.