Making Use of Chlorinated Rubber Intermediate Coat Paint
PAINT SPECIFICATION NO. 18 – Chlorinated Rubber Intermediate Coat Paint
1.1 This speciﬁcation covers a fast drying chlorinated rubber intermediate paint, available in white or tints, intended for use as either an intermediate coat or topcoat over a chlorinated rubber primer or other suitable primers. It has good durability when exposed to exterior environments but may show some tendency to chalk. This coating may be used on exterior non-submerged surfaces, as well as most submerged surfaces. This protective coating is not recommended for areas exposed to strong organic solvents, oxidizing acids, or areas where the surface temperature exceeds 165°F (74°C). Straight chain unsaturated acids and fats and oils of animal or vegetable origin will cause softening and swelling of the coating.
1.2 This coating, when applied over properly primed steel surfaces and followed by at least one (optional) ﬁnish coat of SSPC-Paint 19, “Chlorinated Rubber Topcoat Paint,” is suitable for exposures in Environmental Zones 1A (interior, normally dry), 1B (exterior, normally dry), 2A (frequently wet by fresh water), 2B (frequently wet by salt water), 2C (fresh water immersion), 2D (salt water immersion), 3A (chemical, acid), 3B (chemical, neutral), and 3C (chemical, alkaline).
1.3 This paint is intended for application by brush, roller, or spray and is to be applied in accordance with SSPC-PA 1, “Shop, Field, and Maintenance Painting of Steel.”
1.4 The preferred types of primers for use under this coating and on steel surfaces include chlorinated rubber (SSPC-Paint 17), modiﬁed chlorinated rubber, chemically cured epoxy, zinc-rich, and others speciﬁcally recommended by the manufacturer. Re-coat of each primer should conform to the manufacturer’s directions. Where a zinc-rich primer is used and the system is considered for water-immersion services, a seal-coat between the primer and this intermediate coat may be required to eliminate blistering.
1.5 If this coating is applied over alkyd-or oil-base enamels, there is the possibility of lifting, particularly on interior surfaces. A spot check is necessary to determine suitability. If lifting occurs, then a seal-coat, as recommended by the manufacturer, may be required. For immersion service, this coating should not be applied over alkyd- or oil-base enamels.
2.1 This coating is a mixture of white pigments, tinting pigments, chlorinated rubber, chlorinated resins, plasticizers, and solvents. Details of the composition are given in Table 1.
2.2 This paint contains approximately 35% by volume of nonvolatile ﬁlm-forming solids (pigment and binder). The theoretical spreading rate for a 3.0 mil (76 micrometers) dry ﬁlm thickness is 190 square feet/U.S. gallon (4.6 square meters/liter). Actual spreading rates can be signiﬁcantly lower.
3. Referenced Standards
3.1 The latest issue, revision, or amendment of the referenced standards in effect on the date of invitation to bid shall govern, unless otherwise speciﬁed.
3.2 If there is a conﬂict between the requirements of any of the cited referenced standards and this speciﬁcation, the requirements of this speciﬁcation shall prevail.
3.3 SSPC STANDARDS:
SSPC Guide 13
Guide for the Identiﬁcation and Use of Industrial Coating Material in Computerized Product Databases
Shop, Field, and Maintenance Painting of Steel
Chlorinated Rubber Primer
Chlorinated Rubber Topcoat Paint
3.5 ASTM INTERNATIONAL STANDARDS:
D 13 Speciﬁcation for Spirits of Turpentine
D 185 Test Methods for Coarse Particles in Pigments, Pastes, and Paints
D 445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and the Calculation of Dynamic Viscosity)
D 476 Classiﬁcation For Dry Pigmentary Titanium Dioxide
D 562 Test Method for Consistency of Paints Measuring Krebs Unit (KU) Viscosity Using a Stormer-type Viscometer
D 605 Speciﬁcation for Magnesium Silicate Pigment (Talc)
D 607 Specification for Wet Ground Mica Pigments
D 1208 Test Methods for Common Properties of Certain Pigments
D 1210 Test Methods for Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-type Gage
D 1296 Test Method for Odor of Volatile Solvents and Diluents
D 1475 Test Method for Density of Liquid Coatings, Inks, and Related Products
D 1542 Test Method for Qualitative Detection of Rosin in Varnishes
D 3278 Test Methods for Flash Point of Liquids by Small-Scale Closed-Cup Apparatus
D 3925 Practice for Sampling Liquid Paints and Related Pigmented Coatings
3.6 FEDERAL STANDARDS
MIL-C-429 Chlorinated Parafﬁn, Technical
FED-STD-141 Paint, Varnish, Lacquer and Related Materials: Methods of Inspection, Sampling and Testing
Method 2011 Preparation of Steel Panels
Method 3011 Condition in Container
Method 4021.1 (canceled) Pigment Content (Odinary Centrifuge)
Method 4053 Nonvolatile Vehicle Content
Method 4061 Drying Time
Method 4203 Reducibility and Dilution Stability
Method 4321 Brushing Properties
Method 4331 Spraying Properties
Method 4541 (canceled) Working Properties and Appearance of Dried Film
3.7 AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) STANDARD:
Z129.1 Hazardous Industrial Chemicals – Precautionary Labeling
4.1 Ingredients and proportions shall be as speciﬁed in Table 1.
4.2 The paint based on the speciﬁed ingredients shall be uniform, stable in storage, and free from grit and coarse particles. No rosin or rosin derivatives may be used. Beneﬁcial additives such as anti-skinning agents, suspending agents, or wetting aids may be added.
4.3 The paint shall conform to the composition (analysis) requirements of Table 2.
5.1 The paint shall meet the requirements of Table 3 and Sections 5.2 through 5.6.
5.2 ODOR: Shall be normal for the materials permitted (ASTM D 1296).
5.3 COLOR: The color, or contrasting shade, shall be obtained by using compatible, chemically resistant tinting pigments.
5.4 COMPATIBILITY: There shall be no evidence of incompatibility of any of the ingredients of the paint when one volume of paint is slowly mixed with one volume of xylene (FED-STD-141, Method 4203).
Solvent blends shall be checked in an unpigmented ﬁlm deposited on glass. The dried ﬁlm must be clear and bright. The ﬂexibility and permeability of the trial ﬁlm shall also be compared with that obtained from the “typical formulation” paint.
5.5 WORKING PROPERTIES: The paint shall be easily applied by all three methods when tested in accordance with FED-STD-141, Methods 4321, 4331, and 4541. The paint shall show no streaking, running, or sagging after drying.
5.6 CONDITION IN CONTAINER: The paint shall show no thickening, curdling, gelling, or hard caking when tested as speciﬁed in FED-STD-141, Method 3011, after storage for 12 months from date of delivery, in a full, tightly covered container, at a temperature of 50-110°F (10-43°C).
6.1 Labeling shall conform to ANSI Z129.1.
6.2 Technical data shall be provided for at least all data elements categorized as “essential” in SSPC-Guide 13.
6.3 MARKING OF CONTAINERS: Each container shall be legibly marked with the following information:
Name: Chlorinated Rubber Intermediate Coat Paint
Speciﬁcation: SSPC-Paint 18
Date of Manufacturer:
Quantity of Paint in Container:
Information and Warnings as may be required by
Federal and State Laws:
Manufacturer’s Name and Address:
This paint is intended for use as an intermediate coat or topcoat over rust inhibitive chlorinated rubber primer or other suitable primers on structural steel. Before applying, removal all moisture, oil, grease, dirt, and loose or non-adhering paint. Sound old coatings that are compatible with this chlorinated rubber paint may remain, but damaged areas or areas of poor adhesion must be spot-cleaned and spot-primed.
Preferred primers are chlorinated rubber, modiﬁed chlorinated rubber, chemically cured epoxy, zinc-rich, and others speciﬁcally recommended by the manufacturer. Where a zinc-rich primer is used and the system is considered for water-immersion service, a seal-coat between the primer and this intermediate or topcoat paint may be required to eliminate blistering.
Contaminated prime coats shall be cleaned by appropriate methods before application of succeeding coats.
6.4 DIRECTIONS FOR USE: The following directions for use shall be supplied with each container of paint:
Directions for Use of Chlorinated Rubber Intermediate Coat Paint
Mix paint thoroughly before use. If simple stirring is inadequate pour off most of the liquid into a clean container. Thoroughly mix the pigment with the remaining liquid, taking care to scrape all the pigment off the bottom of the can. Gradually add the poured-off liquid and mix thoroughly. Mixing may be made easier by transferring contents of a larger container or by pouring the paint to and from another container. Examine bottom of container for unmixed pigment. Screen paint before applying.
Generally, thinners are not used for brush application. For spray application, the coating may be thinned with xylene up to 1-1/2 pints per gallon (190 ml/L) of unthinned paint. A by volume blend of 80% minimum of xylene and 20% maximum of an aliphatic solvent having an evaporation rate faster than that of xylene may be used instead of straight xylene.
Apply by brush or spray to the speciﬁed ﬁlm thickness or, if none is speciﬁed, to at least 3.0 mils (75 micrometers) dry or approximately 9 mils (225 micrometers) wet. When application is by spraying, the equipment and operator technique should be properly adjusted to prevent dry spray and to deposit a wet ﬁlm of paint on the substrate. Clean the equipment with xylene or the reducing thinner both before and after use.
The surface to be painted shall be dry and the surface temperature shall be at least 5°F (3°C) above the dew point. When no ice or frost is present on the substrate, this coating may be applied at temperatures as low as 5°F (-15°C). Do not paint outdoors if precipitation, dew, or condensation is expected before the paint dries.
At temperatures of 50-80°F (15-27°C) and relative humidities of 40% to 60% allow at least three hours drying time between coats. Allow at least 48 hours of drying time after the last coat is applied before placing in water immersion service. If the temperature is below 60°F (16°C) or if the relative humidity is above 60%, allow 4 to 7 days before placing in water immersion service.
7.1 All materials (coatings) supplied under this speciﬁcation are subject to timely inspection by the purchaser or his authorized representative. The purchaser shall have the right to reject any materials supplied which are found to be defective under this speciﬁcation. (See Note 9.1) In case of dispute, unless otherwise speciﬁed, the arbitration or settlement procedure established in the procurement documents shall be followed. If no arbitration procedure is established, then a procedure mutually agreeable to the purchaser and material supplier shall be used.
7.2 Samples of paints may be requested by the purchaser and shall be supplied upon request along with the manufacturer’s name and identiﬁcation for the materials. Samples may be requested at the time the purchase order is placed or may be taken from unopened containers at the job site.
7.3 Unless otherwise speciﬁed, the sampling shall be in accordance with ASTM D 3925.
8.1 While every precaution is taken to ensure that all information furnished in SSPC standards and speciﬁcations is as accurate, complete, and useful as possible, SSPC cannot assume responsibility nor incur any obligation resulting from the use of any materials, coatings, or methods speciﬁed herein, or of the speciﬁcation or standard itself.
8.2 This speciﬁcation does not attempt to address problems concerning safety associated with its use. The user of this speciﬁcation, as well as the user of all products or practices described herein, is responsible for instituting appropriate health and safety practices and for ensuring compliance with all governmental regulations.
Notes are not requirements of this speciﬁcation.
9.1 The procurement documents should establish the responsibility for samples, testing, and any required afﬁdavit certifying full compliance with the speciﬁcation.
9.2 ASTM and Federal Standard Test Methods listed as “canceled” or “withdrawn” are no longer maintained, but still available as historical documents.
PAINT SPECIFICATION NO. 18 – Chlorinated Rubber Intermediate Coat Paint