GB2223499A - Coating composition - Google Patents

Coating composition Download PDF

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Publication number
GB2223499A
GB2223499A GB8922552A GB8922552A GB2223499A GB 2223499 A GB2223499 A GB 2223499A GB 8922552 A GB8922552 A GB 8922552A GB 8922552 A GB8922552 A GB 8922552A GB 2223499 A GB2223499 A GB 2223499A
Authority
GB
United Kingdom
Prior art keywords
coating composition
polychloroprene
rubber
cloth
coating
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Withdrawn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
GB8922552A
Other versions
GB8922552D0 (en
Inventor
D N Atkinson
W L Corbett
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.)
BRITISH VITA
Original Assignee
BRITISH VITA
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 BRITISH VITA filed Critical BRITISH VITA
Publication of GB8922552D0 publication Critical patent/GB8922552D0/en
Publication of GB2223499A publication Critical patent/GB2223499A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/693—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural or synthetic rubber, or derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D111/00—Coating compositions based on homopolymers or copolymers of chloroprene

Abstract

A waterproof coating composition for cloth comprises from 55 to 95% by weight of neoprene and from 5 to 45% by weight of another rubber, such as polybutadiene, Styrene butadiene rubber or natural rubber.

Description

WATERPROOF COATING COMPOSITION This invention relates to waterproof coating compositions and has particular but not exclusive relevance to waterproof fabrics.
Waterproof fabrics produced from a natural or synthetic cloth and a polymer layer are commonplace.
For example much military clothing, tent material and watersports clothing is of this kind.
It is common practice to print a cloth such as a woven nylon with the desired pattern such as, for example, the disruptive pattern style printed cloth as used by the military and subsequently to coat the printed fabric with a water resistant polymer layer.
With known fabric of this kind it has hitherto been common practice to coat the cloth with polyurethane. However, polyurethane has many undesirable qualities when used in this application.
The polyurethane coating is not particularly efficient at waterproofing the cloth; it makes a crackly noise when flexed which is particularly undesirable when the fabric is worn as clothing by army personnel in combat; the polyurethane coating is not particularly durable and lacks flexibility which often leads to the delamination of the polyurethane coating from the cloth. The fabric of this type is often coated with an exterior silicone layer to enhance waterproofing abilities of the polyurethane coating.
Fabric with an improved resistance to water has been manufactured by applying a polyvinyl chloride (PVC) coating rather than a polyurethane coating to the cloth. However, this second type of fabric also exhibits many undesirable properties such as poor abrasion resistance and poor low temperature flexibility. Also the PVC coating does not form strong bonds with all printed colours. This is because printing of a pattern on a cloth results in an excess of dyestuff on the surface of the cloth.
Disruptive pattern type military cloth has proven particularly difficult to successfully coat with PVC because of the differing strengths of adhesion between PVC and the various printed dyes of the disruptive pattern.
Polychloroprene coatings have also been applied to cloth in an attempt to improve the quality of the waterproof fabric. Polychloroprene forms strong bonds with a wide range of dyestuffs and has proven to be durable. The polychloroprene coating also exhibits good resistance to hydrophobic liquids such as oils.
However, polychloroprene exhibits poor low temperature flexibility. Additives such as adipates have previously been used in an attempt to improve the low temperature flexibility of the polychloroprene coating, but this adipate additive has disadvantages in that it exhibits poor resistance to solvents and has also not proven durable. It is, therefore, an object of this invention to provide a coating composition which overcomes the problems of the known compositions.
According to the invention there is provided a coating composition comprising from 55 to 95%/wt of polychloroprene and from 5 to 45%/wt of a rubber.
The preferred molecular weight range of the rubber of the invention is from 20,000 to 950,000.
Preferred rubbers are polybutadiene, Styrene butadiene rubber or natural rubber.
The preferred molecular weight range of the polychloroprene of the invention is from 20,000 to 950,000.
A particularly preferred type of polychloroprene is non-crystallising type.
This unique blend of polymers when used as a coating composition exhibits good low temperature flexibility, is durable, is resistant to the action of solvents, is efficient at waterproofing the fabric and does not make a noise when flexed. The coating composition of the invention forms a particularly strong bond with the printed dyes on the surface of the fabric. This coating composition has proven effective in the coating of disruptive pattern style fabric.
The coating composition of the invention may be applied to substantiaily any cloth whether synthetic or natural.
The method of application of the coating composition to the fabric comprises coating the cloth with the coating composition. The coatings are then cured. The waterproof fabric may then be treated to obtain the required finish.
The amount of coating composition applied to the cloth may be varied as required.
The following example further illustrates the invention.
EXAMPLE 1 A coating composition was made from the following ingredients: Parts by Weight Polychloroprene 80 Styrene Butadiene Rubber 20 Zinc oxide 4 pigment 1.5 processing acid 15 Antioxidant 1.5 Magnesium oxide 4.0 Accelerator/curative 0.7 EXAMPLE 2 Comparative tests were carried out to illustrate the improved qualities of the composition of the invention (c) with respect to the prior art compositions comprising polyurethane (a) or polyvinylchloride (PVC) (b).
All three types of coating were applied to the same 120 gsm plain woven nylon.
The following requirements are those of M.O.D. specifications for coated fabrics.
Specification British Vita Quality Designation i.e. (a) Polyurethane (PU) UK/SC 3418H (Vitapruf 10) (b) Polyvinylchloride (PVC) UK/SC 3467 (Vitapruf 325) (c) Polychloroprene UK/SC 4989 (Vitapruf 369) a b c (Vita@ruf 10) (Vita@ruf 325) (Vita@ruf 369) (Vita@ruf 369) Test Method S@sc Values S@sc Values S@sc Values typical values Minimum mess of costing (gsn) 34 160 120 120 Breaking load WP (N/50 mm) BS3424 1150 1200 1250 1300 pt4 method 6CRE WI(N/50 mm) 900 950 900 1000 Tear Stranght BS3424 Pt5 method 7B Warp (N) 90 70 130 160 Weft (N) 90 70 120 155 Costing adresion BS3424 Pt7 method 9B (N/30 mm) 35 70 65 70 Coldcrack BS3424 -40 -30 -30 -40 method 10A Resistance to water penetratio BS3546 Pt3 -10kpa 55 kpa 55 kpa 125kpa AppF part 4 It is to be anderstood that the above described of the invention are by way of illustration only and meny modifications may be made

Claims (8)

  1. CLAIMS 1. A coating composition comprising from 55 to 95% by weight of polychloroprene and from 5 to 45% by weight of a rubber.
  2. 2. A coating composition as claimed in Claim 1, characterised in that the molecular weight of the rubber is in the range from 20,000 to 950,000.
  3. 3. A coating composition as claimed in claim 1 or claim 2, characterised in that said rubber comprises one or more of the following:- poiybutadiene, Styrene butadiene rubber or natural rubber.
  4. 4. A coating composition as claimed in any preceding claim, characterised in that the molecular weight of the polychloroprene is in the range from 20,000 to 950,000.
  5. 5. A coating composition as claimed in any preceding claim, characterised in that the polychloroprene comprises non-crystalising neoprene.
  6. 6. A coating composition as claimed in any preceding claim, characterised in that said coating composition is applied to a body.
  7. 7. A coating composition as claimed in Claim 6, characterised in that said body comprises cloth.
  8. 8. A coating composition as substantially hereinbefore described with reference to Example 1.
GB8922552A 1988-10-07 1989-10-06 Coating composition Withdrawn GB2223499A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB888823637A GB8823637D0 (en) 1988-10-07 1988-10-07 Waterproof coating composition

Publications (2)

Publication Number Publication Date
GB8922552D0 GB8922552D0 (en) 1989-11-22
GB2223499A true GB2223499A (en) 1990-04-11

Family

ID=10644900

Family Applications (2)

Application Number Title Priority Date Filing Date
GB888823637A Pending GB8823637D0 (en) 1988-10-07 1988-10-07 Waterproof coating composition
GB8922552A Withdrawn GB2223499A (en) 1988-10-07 1989-10-06 Coating composition

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB888823637A Pending GB8823637D0 (en) 1988-10-07 1988-10-07 Waterproof coating composition

Country Status (1)

Country Link
GB (2) GB8823637D0 (en)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB596716A (en) * 1944-08-11 1948-01-09 Johnson & Johnson Improvements in and relating to adhesives
GB654688A (en) * 1947-03-14 1951-06-27 Du Pont New resinous coating compositions and flexible sheets coated therewith
GB1100153A (en) * 1963-10-19 1968-01-24 Dunlop Co Ltd Polymeric compositions
GB1195357A (en) * 1968-03-05 1970-06-17 Polymer Corp Elastomeric Blends
GB1340730A (en) * 1970-11-13 1974-01-30 Grace W R & Co Thermoplastic gasket-forming composition and its use for forming seals in can ends
GB1422447A (en) * 1972-04-10 1976-01-28 Uniroyal Inc Inflatable air cushion restraints for automotive vehicles
US3943192A (en) * 1968-03-05 1976-03-09 Polysar Limited Elastomeric blends
US3970133A (en) * 1974-12-16 1976-07-20 The Goodyear Tire & Rubber Company Chlorothio-sulfonamide-modified rubbery terpolymers and their blends
US4048261A (en) * 1975-11-10 1977-09-13 The B. F. Goodrich Company Vulcanizable compositions of a halogen-containing polymer and a diene-nitrile rubber having active halogen cure sites
GB2108974A (en) * 1981-11-03 1983-05-25 Bayer Ag Production of sulphur-modified polychloroprene rubbers

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB596716A (en) * 1944-08-11 1948-01-09 Johnson & Johnson Improvements in and relating to adhesives
GB654688A (en) * 1947-03-14 1951-06-27 Du Pont New resinous coating compositions and flexible sheets coated therewith
GB1100153A (en) * 1963-10-19 1968-01-24 Dunlop Co Ltd Polymeric compositions
GB1195357A (en) * 1968-03-05 1970-06-17 Polymer Corp Elastomeric Blends
US3943192A (en) * 1968-03-05 1976-03-09 Polysar Limited Elastomeric blends
GB1340730A (en) * 1970-11-13 1974-01-30 Grace W R & Co Thermoplastic gasket-forming composition and its use for forming seals in can ends
GB1422447A (en) * 1972-04-10 1976-01-28 Uniroyal Inc Inflatable air cushion restraints for automotive vehicles
US3970133A (en) * 1974-12-16 1976-07-20 The Goodyear Tire & Rubber Company Chlorothio-sulfonamide-modified rubbery terpolymers and their blends
US4048261A (en) * 1975-11-10 1977-09-13 The B. F. Goodrich Company Vulcanizable compositions of a halogen-containing polymer and a diene-nitrile rubber having active halogen cure sites
GB2108974A (en) * 1981-11-03 1983-05-25 Bayer Ag Production of sulphur-modified polychloroprene rubbers

Also Published As

Publication number Publication date
GB8922552D0 (en) 1989-11-22
GB8823637D0 (en) 1988-11-16

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Legal Events

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