Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1989-07-31
1994-03-01
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
424 7808, 424 7837, C08F 1634, A61K 31765
Patent
active
052908941
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to new polymeric biocidal or biostatic compounds and to the treatment of substrates or substrate materials therewith and relates particularly but not exclusively to polymeric acrolein biocidal or biostatic compounds and to substrates or substrate materials treated therewith.
As is well known a biocidal substance kills microorganisms and a biostatic substance inhibits the growth of microorganisms; microorganisms including for example, bacteria, fungi and viruses. It is also known that aldehydes such as glutaraldehyde and formaldehyde are biocidal or biostatic and that substrates or substrate materials may be treated with such substances or compositions to render them at least temporarily biocidal or biostatic. The disadvantages of the use of such substances or such compositions is that the aldehydes have penetrating, obnoxious odours and are volatile thus rendering them unsuitable for long term biocidal or biostatic treatment of substrates or substrate materials.
As a result of microbial action, untreated substrates or substrate materials may be subject to deterioration or production of odours or formation of obnoxious or slippery slime or mildew or give rise to inflammation or transfer of disease. Thus, it is desirable that such substrates or substrate materials can be treated to render them biocidal or biostatic.
Another disadvantage of such conventional biostatic or biocidal compounds or compositions is that they are relatively low molecular weight and therefore pass relatively freely through biological membranes such as the skin or the intestinal wall and in both cases, into the blood stream of humans or animals where they may give rise to antigenic, allergenic or toxic effects; similar destructive or toxic results may arise from for example, passage through the roots or outer membranes of fruits or vegetables. Thus, there is a need for biostatic or biocidal compounds or compositions which do not readily pass through biological membranes.
Prior art such as French Patent 1312166, British Patent 946663 and U.S. Pat. Nos. 3,635,898 and 4,016,127, for example, disclose methods of polymerising acrolein for various purposes such as in the treatment of leather to provide improved mechanical properties. However no prior art recognises that such polymers or polymerization reactions provide biostatic or biocidal properties to substrates treated by such polymers or polymerization processes or that any polymers so produced have biostatic or biocidal properties.
Kirk-Othmer "Encyclopaedia of Chemical Technology" (Third Edition) volume 13--Wiley-Interscience (New York) and "Encyclopaedia of Polymer Science and Technology" Volume 2, 1965 Interscience Publishers (New York) similarly do not refer to any known biostatic or biocidal properties of acrolein polymers or substrates treated with such polymers. Kirk Othmer refers to the anti fungal or anti slime properties of acrolein monomer. However there is no suggestion that any acrolein polymer may have similar properties. Kirk Othmer also states that no commercial uses are known for acrolein polymers.
Further prior art--Journal of Polymer Science Vol 9, 1971, 1013-1025, Ishavov, Azizov, Negmankhodzhayeva and Usamov discloses treatment of cellulose with acrolein to improve mechanical properties of the cellulose. The authors conclude that "no acrolein homopolymer is formed in the vapour systems." and that the footnote to the relevant table 8 refers to the crosslinking having been done in the vapour phase. This excludes any conclusion that the antimicrobial property relates to polyacrolein polymer; the total context of the paper is of cross-linking in the absence of polyacrolein polymer, being due to monomeric joining of cellulose by the double bond and the carbonyl group, respectively of acrolein monomer.
It has now been discovered that polymeric compounds having, illustratively, the repeating unit ##STR1## may be utilized as biocidal or biostatic compounds and for the treatment of substrates or substrate materials to render them biocidal or bi
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Kleppe Concetta M.
Langley Jeffrey W.
Melrose Graham J. H.
Stewart Jeffrey M.
Van Dyk Jacobus
Biopolymers Limited
Michl Paul R.
Szekely Peter
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