Adhesive cyanoacrylate compositions with reduced adhesion to skin
First Claim
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1. An adhesive composition comprising:
- from about 55 to about 92 percent by weight of a 2-cyanoacrylate ester;
from about 4 to about 30 percent by weight of a vinyl chloride/vinyl acetate copolymer dissolved in said 2-cyanoacrylate ester, said copolymer having a molecular weight of at least about 8000 and containing a major proportio by weight of vinyl chloride and a minor proportion, but not less than 5% by weight, of vinyl acetate; and
not more than about 25 percent by weight of a plasticizer.
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Abstract
A cyanoacrylate-based adhesive composition comprises 55-92% by weight of a 2-cyanoacrylate ester, preferably the ethyl ester, from 40-30% by weight of a vinyl chloride/vinyl acetate copolymer and not more than 25% by weight of a plasticizer (the plasticizer may be omitted entirely). The copolymer is preferably a vinyl chloride/vinyl acetate/maleic acid terpolymer. The adhesive compositions have greatly reduced adhesion to skin, not forming strong skin bonds for at least 30 seconds, in contrast to conventional cyanoacrylate adhesive compositions which form, within in about one second bonds strong enough to tear skin.
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Citations
23 Claims
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1. An adhesive composition comprising:
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from about 55 to about 92 percent by weight of a 2-cyanoacrylate ester; from about 4 to about 30 percent by weight of a vinyl chloride/vinyl acetate copolymer dissolved in said 2-cyanoacrylate ester, said copolymer having a molecular weight of at least about 8000 and containing a major proportio by weight of vinyl chloride and a minor proportion, but not less than 5% by weight, of vinyl acetate; and not more than about 25 percent by weight of a plasticizer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An adhesive composition comprising:
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from about 75 to about 85 percent by weight of ethyl 2-cyanoacrylate; from about 10 to about 18 percent by weight of a vinyl chloride/vinyl acetate copolymer dissolved in said 2-cyanoacrylate ester, said copolymer having a molecular weight of at least about 8000 and comprising about 80 to about 90 percent by weight vinyl chloride and about 10 to about 20 percent by weight vinyl acetate; and from about 3 to about 8 percent by weight of a plasticizer. - View Dependent Claims (17, 18)
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19. An adhesive composition comprising:
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from about 75 to about 85 percent by weight of ethyl 2-cyanoacrylate; from about 10 to about 18 percent by weight of a vinyl chloride/vinyl acetate/maleic acid terpolymer dissolved in said 2-cyanoacrylate ester, said terpolymer having a molecular weight of at least about 8000 and comprising about 80 to about 90 percent by weight vinylchloride, from about 10 to about 20 percent by weight vinyl acetate and not more than about 2 percent by weight maleic acid; and from about 3 to about 8 percent by eight of a plasticizer. - View Dependent Claims (20, 21)
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22. A process for forming an adhesive composition, which comprises:
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forming a stabilized cyanoacrylate ester composition comprising a 2-cyanoacrylate ester and an anionic polymerization inhibitor; and dissolving a pulverulent vinyl chloride/vinyl acetate copolymer having a molecular weight of at least about 8000 in said cyanoacrylate composition at a temperature of about 70°
to about 85°
C. until said copolymer is completely dissolved in said cyanoacrylate composition, such that the adhesive composition formed comprises from about 55 to about 92 percent by weight of said cyanoacrylate ester and about 4 to about 30 percent by weight of said copolymer. - View Dependent Claims (23)
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Specification