GB1052546A - - Google Patents

Info

Publication number
GB1052546A
GB1052546A GB1052546DA GB1052546A GB 1052546 A GB1052546 A GB 1052546A GB 1052546D A GB1052546D A GB 1052546DA GB 1052546 A GB1052546 A GB 1052546A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
rubber
latex
coagulant
dipping
form
Prior art date
Application number

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/14Dipping a core
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS
    • B29K2021/00Use of unspecified rubbers as moulding material

Abstract

1,052,546. Coated articles. UNITED STATES RUBBER CO. March 2, 1965 [March 18, 1964], No. 8774/65. Heading B2K. The friction coefficient of a dip moulded elastomeric article is reduced by giving it a slip coating comprising a blend of an elastomer and a resin. In making a rubber glove, the form is coated with a release agent and dipped on to an aqeuous dispersion of rubber latex and a latex of an alkyl acrylate resin stabilized against coagulation and containing a polyvalent metal salt coagulant. The form is withdrawn, dried and dipped in a latex glove compound, the thickly deposited rubber being subsequently dried and the coagulant leached out. The article may be further heated to vulcanize the rubber. Alternatively the form is dipped first in a rubber latex and the coagulant leached out, before dipping in the mixture of elastomer latex and resin latex. A girdle with a flocked inner surface is made by dipping the girdle form in the mixed rubber-resin latices (suitably stabilized) containing a coagulant, dipping in rubber latex sensitive to the coagulant and thereafter flocking the exterior surface to give it moisture absorbant properties. The elastomer latex may be any conventional latex suitable for dipping, natural rubber, polychloroprene, polyisoprene S.B.R. and mixtures thereof being preferred; the substrate will generally be the same as the elastomer of the slip coat for optimum adhesion. The latex of the substrate may be pre-cured. Copolymers of dienes with copolymerizable monomers may also be used. The preferred resins are the alkyl acrylates especially copolymers of alkyl acrylate or methacrylate with acrylic or methacrylic acids; vinyl acetate polymers; polyethylene; polyvinyl acetals; vinylchloride polymers and copolymers; styrene acrylonitrile; and high styrene-butadiene copolymers. A non- ionic surfactant is used as a stabilizer for the mixed latices and a polyvalent metal (Ca Mg Al Dc) salt (nitrate chloride or sulphate) or an acid (acetic formic or lactic) may be the coagulant for the thick rubber coating. The release coating is talc in alcohol or acetone.
GB1052546A GB1052546A (en)

Publications (1)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2335335A1 (en) * 1975-12-15 1977-07-15 Boulain Robert Bicycle inner tubes prodn. - by dipping a former into butyl rubber latex, then into natural or synthetic rubber latex and covulcanising composite rubber layer formed
WO1996025279A1 (en) * 1995-02-14 1996-08-22 Allegiance Corporation A multiple dip process for making a powder-free article
WO1999026665A2 (en) * 1997-11-26 1999-06-03 Ranier Limited Reticulated polymeric coatings
US5993923A (en) * 1995-02-14 1999-11-30 Avery Dennison Corporation Acrylic emulsion coating for rubber articles
US6284856B1 (en) 1995-02-14 2001-09-04 Avery Dennison Corporation Acrylate, silicone, styrene, urethane copolymer coatings for natural and synthetic rubber articles
US6465591B1 (en) 2000-04-24 2002-10-15 Avery Dennison Corporation Acrylic emulsion coating for films, paper and rubber
EP1344621A1 (en) * 2002-03-12 2003-09-17 Maidamax (M) Sdn Bhd A process for coalescing elastomeric article with a substiantially square-shaped elastomeric bead and the end product produced from the process

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2335335A1 (en) * 1975-12-15 1977-07-15 Boulain Robert Bicycle inner tubes prodn. - by dipping a former into butyl rubber latex, then into natural or synthetic rubber latex and covulcanising composite rubber layer formed
WO1996025279A1 (en) * 1995-02-14 1996-08-22 Allegiance Corporation A multiple dip process for making a powder-free article
US5993923A (en) * 1995-02-14 1999-11-30 Avery Dennison Corporation Acrylic emulsion coating for rubber articles
US6284856B1 (en) 1995-02-14 2001-09-04 Avery Dennison Corporation Acrylate, silicone, styrene, urethane copolymer coatings for natural and synthetic rubber articles
WO1999026665A2 (en) * 1997-11-26 1999-06-03 Ranier Limited Reticulated polymeric coatings
WO1999026665A3 (en) * 1997-11-26 1999-09-02 Ranier Ltd Reticulated polymeric coatings
US6732735B1 (en) 1997-11-26 2004-05-11 Ranier Limited, Fountain House Reticulated coatings
US6465591B1 (en) 2000-04-24 2002-10-15 Avery Dennison Corporation Acrylic emulsion coating for films, paper and rubber
US6828399B2 (en) 2000-04-24 2004-12-07 Avery Dennison Corporation Acrylic emulsion coating for films, paper and rubber
EP1344621A1 (en) * 2002-03-12 2003-09-17 Maidamax (M) Sdn Bhd A process for coalescing elastomeric article with a substiantially square-shaped elastomeric bead and the end product produced from the process

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