GB2262468A - Moulding polymeric articles having a biocidally active surface - Google Patents

Moulding polymeric articles having a biocidally active surface Download PDF

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Publication number
GB2262468A
GB2262468A GB9126920A GB9126920A GB2262468A GB 2262468 A GB2262468 A GB 2262468A GB 9126920 A GB9126920 A GB 9126920A GB 9126920 A GB9126920 A GB 9126920A GB 2262468 A GB2262468 A GB 2262468A
Authority
GB
United Kingdom
Prior art keywords
article
composition
biocide
polymeric
mould
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9126920A
Other versions
GB9126920D0 (en
Inventor
Alan Colin Dixon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YAD HYGIENE PRODUCTS Ltd
Original Assignee
YAD HYGIENE PRODUCTS Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by YAD HYGIENE PRODUCTS Ltd filed Critical YAD HYGIENE PRODUCTS Ltd
Priority to GB9126920A priority Critical patent/GB2262468A/en
Publication of GB9126920D0 publication Critical patent/GB9126920D0/en
Publication of GB2262468A publication Critical patent/GB2262468A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
    • B29C37/0028—In-mould coating, e.g. by introducing the coating material into the mould after forming the article
    • B29C37/0032—In-mould coating, e.g. by introducing the coating material into the mould after forming the article the coating being applied upon the mould surface before introducing the moulding compound, e.g. applying a gelcoat
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/34—Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
    • B29C37/0028—In-mould coating, e.g. by introducing the coating material into the mould after forming the article
    • B29C2037/0035—In-mould coating, e.g. by introducing the coating material into the mould after forming the article the coating being applied as liquid, gel, paste or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
    • B29C37/0028—In-mould coating, e.g. by introducing the coating material into the mould after forming the article
    • B29C2037/0039—In-mould coating, e.g. by introducing the coating material into the mould after forming the article the coating being applied in powder or particle form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
    • B29K2105/0011—Biocides

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Pest Control & Pesticides (AREA)
  • Plant Pathology (AREA)
  • Agronomy & Crop Science (AREA)
  • Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

A composition comprising a biocide is applied to the surface of a mould or former and when a polymeric article is produced by shaping (i.e. moulding or forming) of a polymer or polymer or composition using the mould or former, the biocide is incorporated into the surface portion of the article thereby rendering the surface of the article biocidally active. The biocide is preferably chlorhexidine.

Description

POLYNERIC ARTICLES TECHNICAL FIELD OF THE INVENTION The present invention relates to polymeric articles and, in particular to the imparting of biocidal activity to such articles.
BACKGROUND ART Plastics materials (i.e. pol#eric materials) have become ilbiguitous and indispensible in most areas of human existence and endeavour Aside fran the functional attributes of plastic materials which denote their prrn##y usefulness, it is their innocuous nature in contact with humans -hich has allowed plastics to pervade human life so thoroughly. Commercially used plastics materials however, as well as being innocuous to humans are also innocuous to other organisms, including bacteriological pathogens which can be harmful and even life threatening to humans.Plastics surfaces therefore nave the potential to act as breeding and transmission sites for a vast range of bacteria which, while not harmful to the plastics material may be undesirable in contact with human users of plastics artifacts, There exists prior art which claims to incorporate biocidally active agents into high polymeric materials thereby forming plastics materials having disinfectant or bacteriocidal properties.
Such materials, however, suffer fran two inherent dra#Thacks.
1. The biocidally active agents are thermally sensitt e and tend to be degraded or destroyed during the production of plastics articles 2. The process used to incorporate the biocidal materials into the plastics necessitates that the biocide is distributed throughout the polymer thus requiring relatively large quantity of biocide to be incorporated to achieve a desired surface activity.
As a result, both effectiveness and cost of biocidal materials produced are carpranised where conventional moulding materials and techniques are employed.
DESCRIPTION OF INVENTION It is an object of the invention to mitigate the disadvantages described above.
The invention is applicable to plastics in general, including rubbers, and related materials.
According to a first aspect of the invention, there is provided a composition (referred to below as the "biocidal composition") comprising a biocide (biocidal agent) and being such that it can be applied to the surface of a mould or former and when a polymeric article is produced by shaping (i.e. moulding or forming) of a polymer or polymeric composition using the mould or former, the biocide is incorporated into the surface portion of the article thereby rendering the surface of the article biocidally active.
According to a second aspect of the invention, there is provided a method of producing a polymeric article, comprising shaping a polymer or polymeric composition using a mould or former, to the surface of which a polymeric composition in accordance with the first aspect of the invention has been applied so that the biocide becomes incorporated into the surface portion of the article thereby rendering the surface of the article biocidally active.
It will be appreciated that the biocidal composition is required to be applied to the inner surface of the mould or the or the outer surface of the former.
The biocidal coaposition may be coated on to the surface of the mould or former.
ty means of the invention the biocide may be permanently incorporated into the surface portion of the article.
Preferably the biocide is a biocidal agent which is innocuous to humans.
Preferably the biocide is a biocidal agent which is compatible with the polymer or polymeric c#ThosItion i.e. preferably the biocide has no adverse effect on the polymer or polymeric composition.
Preferably the biocide is bacteriocidal.
Preferably the biocidal agent is bound to the mould or former surface prior to and during shaping of the polymeric article until such time as it (i.e. the biocidal agent) becomes incorporated into the surface portion of the article.
The biocldal agent may be chlorhexidine, i.e. l,6-di(4-chlorophenyl diguanide) hexane.
The composition may contain between 5% and 95% by weight chlorhexidine, e.g. as particulate solid, solution, dispersion or in polymeric form. The biocidal coppo#sition may also contain a dispersion and/or carrier medium for the chlorhexidine. Such medium may comprise polyvinyl alcohol and/or one or more cellulosic constituents. The medium may be a solution of cellulose.
The composition may be such that it can be applied to the mould or former surface by spraying, brushing, electrostatic coating or solid application coating (e.g. by providing the composition in a form similar to a paint stick, grease or solid deodorant).
Preferably the shaping of the polymeric article is effected without substantially thermally degrading or otherwise degrading the biocide.
The composition should preferably be such that it affixes itself or adheres to the mould or former surface sufficiently well that the biocide is not substantially dislodged or displaced when the polymeric article is shaped.
The shaping of the polymeric article may be effected by e.g.
injection moulding, compression moulding, resin transfer moulding, casting, rotational moulding, reaction injection moulding, dip coating, latex forming, thermoforming or fluidised bed coating.
Preferably the biocide is transferred permanently into the surface of the article by the shaping process According to one preferred feature of the invention, during and/or after the shaping process, the non-biocidally active component or components of the mould biocidal composition are volatilised, destroyed or otherwise rendered fugitive without the effective activity of the biocide being substantially reduced.
According to another preferred feature of the invention, the non-biocidally active component or components of the biocidal composition may be removed from the surface of the polymeric article by washing.
According to a further preferred feature of the invention, the non-biocidally active component or components of the biocidal composition may be compatible with the surface of the shaped article and remain on or within the surface portion of the article during use of the article.

Claims (22)

  1. I. A composition comprising a biocide and being such that it can be applied to the surface of a mould or former and when a polymeric article is produced by shaping of a polymer or polymeric composition using the mould or former, the biocide is incorporated into the surface portion of the article thereby rendering the surface of the article biocidally active.
  2. 2. A composition according to claim 1, wherein the biocide is a biocidal agent which is innocuous to humans.
  3. 3. A composition according to claim 1 or 2, wherein the biocide is a biocidal agent which is compatible with the polymer or polymeric composition.
  4. 4. A composition according to any preceding claim, wherein the biocide is bacteriocidal.
  5. 5. A composition according to any preceding claim, wherein the biocidal agent is chlorhexidine, i.e. 1,6-di(4-chlorophenyl diguanidehexane.
  6. 6. A composition according to claim 5, containing between 5% and 95% by weight chlorhexidine.
  7. 7. A composition according to claim 6, wherein the chiorhexidine is present as particulate solid, solution, dispersion or in polymeric form.
  8. 8. A composition according to claim 6 or 7, comprising a dispersion and/or carrier medium for the chlorhexidine.
  9. 9. A composition according to claim 8, wherein the carrier medium comprises polyvinyl alcohol andjor one or more cellulosic constituents.
  10. 10. A composition according to claim 9, wherein the carrier medium is a solution of cellulose.
  11. 11. A composition according to any preceding claim, being such that it can be applied to the mould or former surface by spraying, brushing, electrostatic coating or solid application coating.
  12. 12. A composition according to any preceding claim, being such that it affixes itself or adheres to the mould or former surface sufficiently well that the biocide is not substantially dislodged or displaced when the polymeric article is shaped.
  13. 13. A method of producing a polymeric article, comprising shaping a polymer or polymeric composition using a mould or former, to the surface of which a composition in accordance with any of claims 1 to 12 has been applied so that the biocide becomes incorporated into the surface portion of the article thereby rendering the surface of the article biocidally active.
  14. 14. A method according to claim 13, wherein the composition is applied to the inner surface of the mould or the outer surface of the former.
  15. 15. A method according to claim 13 or 14, wherein the composition is coated onto the surface of the mould or former.
  16. 16. A method according to any of claims 13 to 15, wherein the biocide is permanently incorporated into the surface portion of the article.
  17. 17. A method according to any of claims 13 to 16, wherein the biocide is bound to the mould or former surface prior to and during shaping of the polymeric article until such time as it (i.e. the biocide) becomes incorporated into the surface portion of the article.
  18. 18. A method according to any of claims 13 to 17, wherein the shaping of the polymeric article is effected without substantially thermally degrading or otherwise degrading the biocide.
  19. 19. A method according to any of claims 13 to 18, wherein the shaping of the polymeric article effected by injection moulding, compression moulding, resin transfer moulding, casting, rotational moulding, reaction injection moulding, dip coating, latex forming, thermoforming or fluidised bed coating.
  20. 20. A method according to any of claims 13 to 19, wherein during and/or after the shaping process the non-biocidally active component or components of the biocidal composition are volatilised, destroyed or otherwise rendered fugitive without the effective activity of the biocide being substantially reduced.
  21. 21. A method according to any of claims 13 to 19, wherein the nonbiocidally active component or components of the biocidal composition are removed from the surface of the polymeric article by washing.
  22. 22. A method according to any of claims 13 to 19, wherein the nonbiocidally active component or components of the biocidal composition are compatible with the surface of the shaped article and remain on or within the surface portion of the article during use of the article
GB9126920A 1991-12-19 1991-12-19 Moulding polymeric articles having a biocidally active surface Withdrawn GB2262468A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9126920A GB2262468A (en) 1991-12-19 1991-12-19 Moulding polymeric articles having a biocidally active surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9126920A GB2262468A (en) 1991-12-19 1991-12-19 Moulding polymeric articles having a biocidally active surface

Publications (2)

Publication Number Publication Date
GB9126920D0 GB9126920D0 (en) 1992-02-19
GB2262468A true GB2262468A (en) 1993-06-23

Family

ID=10706503

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9126920A Withdrawn GB2262468A (en) 1991-12-19 1991-12-19 Moulding polymeric articles having a biocidally active surface

Country Status (1)

Country Link
GB (1) GB2262468A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6420455B1 (en) 1999-06-18 2002-07-16 3M Innovative Properties Company Antimicrobial composition containing photosensitizers articles, and methods of use
US6475505B1 (en) 1999-12-20 2002-11-05 Ciba Specialty Chemicals Corporation Biocide-polyester concentrates and biocidal compositions prepared therefrom

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB728869A (en) * 1952-04-26 1955-04-27 Us Rubber Co Manufacture of sponge rubber articles
GB991653A (en) * 1962-04-03 1965-05-12 Antonio Dario Process for producing inscriptions and decorations on plates of acrylic resins and plates so produced
GB1399472A (en) * 1972-05-10 1975-07-02 Brancher G E Process for the manufacture of moulded fibrereinforced resin articles
GB1448555A (en) * 1972-08-22 1976-09-08 British United Shoe Machinery Printing plastisol inks
FR2469263A1 (en) * 1979-11-09 1981-05-22 Declercq Raymond Resin coated mouldings with colour concentrated on high relief - to align grain and colour patterns for imitation wood surfaces
GB2068819A (en) * 1980-02-13 1981-08-19 Exxon Research Engineering Co Polyurethane mouldings
GB2084466A (en) * 1980-10-06 1982-04-15 Mcnally Ronald Biocidal material

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB728869A (en) * 1952-04-26 1955-04-27 Us Rubber Co Manufacture of sponge rubber articles
GB991653A (en) * 1962-04-03 1965-05-12 Antonio Dario Process for producing inscriptions and decorations on plates of acrylic resins and plates so produced
GB1399472A (en) * 1972-05-10 1975-07-02 Brancher G E Process for the manufacture of moulded fibrereinforced resin articles
GB1448555A (en) * 1972-08-22 1976-09-08 British United Shoe Machinery Printing plastisol inks
FR2469263A1 (en) * 1979-11-09 1981-05-22 Declercq Raymond Resin coated mouldings with colour concentrated on high relief - to align grain and colour patterns for imitation wood surfaces
GB2068819A (en) * 1980-02-13 1981-08-19 Exxon Research Engineering Co Polyurethane mouldings
GB2084466A (en) * 1980-10-06 1982-04-15 Mcnally Ronald Biocidal material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6420455B1 (en) 1999-06-18 2002-07-16 3M Innovative Properties Company Antimicrobial composition containing photosensitizers articles, and methods of use
US6475505B1 (en) 1999-12-20 2002-11-05 Ciba Specialty Chemicals Corporation Biocide-polyester concentrates and biocidal compositions prepared therefrom
US7041307B2 (en) 1999-12-20 2006-05-09 Ciba Specialty Chemicals Corporation Biocide-polyester concentrates and biocidal compositions prepared therefrom
KR100691538B1 (en) * 1999-12-20 2007-03-09 시바 스폐셜티 케미칼스 홀딩 인코포레이티드 Biocide-polyester concentrates and biocidal compositions prepared therefrom

Also Published As

Publication number Publication date
GB9126920D0 (en) 1992-02-19

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)