1 Scope
This standard specifies the classification, requirements, test methods, inspection rules, marking, packaging and storage of solvent-thinned polyurethane coatings.
This standard is applicable to room temperature-cured two-component coatings for metal surfaces and indoor woodenware with polyester resins, alkyd resins and acrylic resins containing reactive functional groups as the main film former and polyisocyanate resins as curing agents.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the document referred to applies.
GB/T 700-1988 Carbon structural steels
GB/T 1250-1989 Rules for expression and judgment of limiting values
GB/T 1728-1979 (1989) Methods of test for drying time of coatings of paints and putties
GB/T 1732-1993 Determination of impact resistance of film
GB/T 1740 Determination of resistance to heat and humidity of paint films
GB/T 1766-1995 Paints and varnishes - Rating schemes of degradation of coats (neq ISO 4628: 1980)
ISO 7784-2: 1997 Paints and varnishes - Determination of resistance to abrasion - Rotating abrasive rubber wheel method
GB/T 1771 Paints and varnishes - Determination of resistance to neutral salt spray (fog) (GB/T 1771-1991, eqv ISO 7253: 1984)
GB/T 1865-1997 Paints and varnishes - Artificial weathering and exposure to artificial radiation - Filtered xenon-arc radiation (eqv ISO 11341: 1994)
GB/T 4893.1-2005 Furniture - Assessment of surface resistance to cold liquids
GB/T 4893.3-2005 Furniture - Assessment of surface to dry heat (neq ISO 4211-3: 1993, Furniture - Tests for surfaces - Part 3: Assessment of resistance to dry heat)
GB/T 4893.9-1992 Furniture - Test for surfaces - Assessment of resistance to impact
ISO 15184: 1998 Paints and varnishes - Determination of film hardness by pencil test
GB/T 6742 Bend test for coating (cylindrical mandrel) (GB/T 6742-1986, neq ISO 1519: 1973)
GB/T 9271-1988 Paints and varnishes - Standard panels for testing (eqv ISO 1514: 1984)
GB/T 9274-1988 Paints and varnishes - Determination of resistance to liquids (eqv ISO 2812: 1974)
GB 9278 Temperatures and humidities for conditioning and testing of paint specimens (GB 9278-1988, eqv ISO 3270: 1984, Paints and varnishes and their raw materials - Temperatures and humidities for conditioning and testing)
GB/T 9286-1998 Paints and varnishes - Cross cut test for films (eqv ISO 2409: 1992)
GB/T 9750-1998 Marks for package of coating products
GB/T 9754 Paints and varnishes - Determination of specular gloss of non-metallic paint films at 20°, 60° and 85° (GB/T 9754-1988, eqv ISO 2813: 1978)
GB/T 9757-2001 Solvent-thinned coatings for exterior wall
GB/T 13452.2-1992 Paints and varnishes - Determination of film thickness (eqv ISO 2808: 1974)
GB/T 13491-1992 General rule for packing of coatings
GB/T 15608-1995 The Chinese color system
ISO 15528: 2000 Paints, varnishes and raw materials for paints and varnishes - Sampling
ISO 6272-2: 2002 Paints and varnishes - Rapid-deformation (impact resistance) tests - Part 2: Falling-weight test, small-area indenter
JG/T 25-1999 Determination for freeze-thaw resistance of film of building coatings
ISO 11507: 1997 Paints and varnishes - Exposure of coatings to artificial weathering - Exposure to fluorescent UV and water
3 Product classification
In this standard, solvent-thinned polyurethane coatings are divided into two types depending on the two areas to which they are mainly applied: Type I, coatings for indoor woodenware, and Type II, coatings for metal surface. Based on the functions of various types of coatings, Type I products are subdivided into finish paints for furniture factory and decoration, finish paints for floors and general purpose primer; Type II products are subdivided into finish paints for interior use and those for exterior use, with the former applicable to the surface decoration and protection of pipes, metal furniture and hardware products which are arranged indoors, and the latter applicable to the surface decoration and protection of metal equipment and components, bridges, chemical equipment and the like.
Foreword i
1 Scope
2 Normative references
3 Product classification
4 Requirements
5 Test methods
6 Inspection rules
7 Marking, packaging and storage
Bibliography
