1. Physical properties:
This product is a thermoplastic resin.
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Appearance
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White granules or powder.
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Relative density
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1.08-1.10
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Fill density
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0.18-0.35 g/ml
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Refractive index
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1.488 (20°C)
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Water absorption
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<4%
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Softening temperature
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60-65°C
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Glass Transition Temperature
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66-84°C (varies with degree of polymerization)
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Ultimate Tensile Strength
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40-50 MPa
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Rockwell Hardness
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45
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Specific Heat
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0.4 kJ/(kg·°C)
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Dielectric Constant (60 Hz)
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2.7-3.3
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Dielectric Strength
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400-480 V/Joule
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Decomposition Temperature
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Above 200°C
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Melting Temperature
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165-200°C
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Thermal Stability
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Shifts above 100°C.
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Solubility: Soluble in methanol, ethanol, n-butanol, isopropanol, n-pentanol,
benzyl alcohol, butanol, diacetone alcohol, propylene glycol ethyl ether/methyl ether/propyl
ether, acetone, methyl ethyl ketone, cyclohexanone, dichloromethane, chloroform, methyl
acetate, ethyl acetate, butyl acetate, acetic acid, etc.
Compatibility: This product has excellent compatibility with phthalates,
pyrogallol esters, sebacate esters, n-hexyl adipate, plasticizers, cellulose acetate,
phenolic resins, urea-formaldehyde resins, furfural resins, epoxy resins, and natural resin
rosin, significantly improving the performance of these resins.
2. Chemical properties:
Polyvinyl butyral is a secondary reactive polymer, a hot-melt resin that can be cross-linked
and hardened with thermosetting resins. It is chemically stable and resistant to chemicals,
solvents, sunlight, oxygen, ozone, inorganic acids, and aliphatic hydrocarbons.
3. Special properties:
(1) High transparency: This product has extremely high light transmittance, with
a transmittance of over 90% at 660μm.
(2) Film-forming properties: This product has good film-forming properties and
can be rolled, extruded, leveled, and coated to form films. Its film has excellent tensile
strength, tear strength, abrasion resistance, flexural properties, and gloss.
(3) Weather resistance: This product is UV-resistant and not prone to aging
under natural conditions.
(4) Cold resistance: This product is resistant to low temperatures of 0-60℃ and
maintains good mechanical strength at low temperatures.
(5) Abrasion resistance: More than 10 times that of rubber.
(6) Adhesion: This product has good adhesion to metals, plastics, leather,
glass, wood, etc.
(7) Pigment dispersion: This product has good dispersion and stability for
various pigments.
1. Transparent materials
Because this product has special adhesion and high transparency to both inorganic and organic
glass, it can be used as an interlayer material for safety glass. Safety glass made with
this product as an interlayer has been widely used in windshields of cars and airplanes and
window glass of high-rise buildings. Because safety glass made with PVB as an interlayer has
extremely strong impact resistance, high transparency, water resistance, and aging
resistance, and can be used in an environment of minus 60°C, it can also replace products
made with organic glass as a transparent material. It is also widely used in safety
guardrails such as escalators and counter safety protection in the financial jewelry
industry.
2. Coatings
Because this product has the characteristics of high bonding strength, cold resistance, oil
resistance, wear resistance, and good corrosion resistance, it is widely used in:
(1) Wood coatings
Surface treatment agent for plywood and primer for hardboard and insulation board,
thermoplastic polyvinyl acetal resin modified phenolic resin: high mechanical strength, good
flexibility, cold resistance, and excellent atmospheric aging resistance, it can be used for
bonding wood and metal.
(2) Metallic paint
Used for ordinary drying paint and baking paint for metal. Natural resin, synthetic resin and
quick-drying oil are added to polyvinyl butyral. Polyvinyl butyral significantly improves
the adhesion, toughness and durability of this paint. Adding thermosetting resin will
increase its impact resistance, heat resistance and adhesion. For example, a mixture of a
phenolic resin and a small amount of polyvinyl butyral can be made into an excellent baking
paint, which can be used for food containers.
(3) Metal primer
This product has strong adhesion to metal and good adhesion to surface coatings. It can be
used as a primer for metal materials such as steel, aluminum, galvanized steel, iron, and
copper. It is now widely used in coatings for marine ships, submarines, seaplanes, submerged
drilling rigs, bridges, electrical appliances, etc.
(4) Coatings for metal foils
Coating PVB solution on metal foils (mainly aluminum foils) can improve the strength and
moisture resistance of the foils, and can be completely wrapped with heat sealing. It is
used for packaging foods such as chocolates and biscuits, as well as automatic packaging of
medicines, photographic parts, etc.
(5) Coatings for vacuum evaporation
The alcohol solution of this product can adhere well to plastic surfaces, paper metal
surfaces, and can be used as an adhesive for vacuum evaporation, such as vacuum aluminum
plating, and coatings for processed surfaces.
(6) Concrete coatings
When the solution of this product is used as a base coating, it can improve the durability of
water-based paint films.
(7) Waterproof coatings
As a waterproof paint for fabrics, adding this product can achieve good results. It can be
used to make tents, coats, food bags, raincoats, raincoats, etc.
(8) Coatings for leather
The film of this product shows strong elongation at room temperature and can maintain this
property at low temperatures. Therefore, it can be used to prepare soft and elastic films.
This has become a unique property of this product.
(9) Glossy surface protective coatings
Used for varnishes for woodworking crafts, paints for metal wires and other various metal
plating surfaces. Used for tennis rackets, racket clips, etc.
(10) Powder coatings
This product is a modifier for epoxy resin powder coatings and is used to produce
solvent-free and environmentally friendly coatings.
(11) Casting coatings
This product can be used for more than 40 casting coatings, including glass color coatings,
metal casting coatings for centrifugal casting, light-curing coatings for artificial marble
decorative panels, special casting coatings, etc.
3. Adhesives:
This product contains hydroxyl, acetyl and butyraldehyde groups and has high bonding
properties, so it can be made into various adhesives
(1) Glass bonding: Because this product has extremely high bonding strength, appropriate
elasticity and softness, it can be used to bond glass.
(2) Metal bonding: This product can be mixed with phenolic resin to prepare different brands
of acetal phenolic glue, which is used for bonding various metals. Apply the glue liquid on
the metal surface, wait for the solvent to evaporate, and then heat and press the coated
metal.
(3) Bonding of enameled coils: Apply the solution of this product to the coil and heat it to
bond the coil.
(4) Heat-sealing adhesive: This product can be mixed with natural resins, synthetic resins
and plasticizers and can be used as a heat-sealing adhesive.
(5) Adhesive for "transfer trademarks": This product can be used as an adhesive for "transfer
trademarks" on porcelain. It not only saves processes but also improves product quality. The
fired ceramics have bright colors and smooth textures. It has been widely used as a resin
for "porcelain flower paper". In addition, it can also be used for "transfer trademarks" on
textiles.
(6) Adhesive film: This product can be used for heating and bonding cloth to cloth or other
materials after being combined with other synthetic resins, synthetic rubbers and
plasticizers.
(7) Pressure-sensitive adhesive: It is used as an adhesive raw material for
pressure-sensitive adhesive tapes such as cellophane adhesive tapes and polyethylene
adhesive tapes.
(8) Hot-melt adhesive: This product is a hot-melt resin and can be used to produce hot-melt
adhesives.
(9) Other adhesives: It can be used as an adhesive for non-woven fabrics, an adhesive for
electrostatic flocking, and a raw material for leather adhesives.
4. Application in fiber processing:
(1) Coating: The solution of this product with plasticizers can be applied to various
textiles to make them waterproof and anti-fouling, without destroying the original feel and
style of the textiles. Adding cross-linking resins, curing agents, etc. can improve the
processing effect.
(2) Fiber treatment agent: The dispersion of this product containing plasticizers can be used
as a cotton fabric treatment agent, shrinkage-proof agent, wear-resistant agent, and
stiffening agent. Clothes made from various fibers after sizing with it are soft,
wrinkle-free, and sun-resistant.
(3) Fabric printing and dyeing: The solution of this product can be used for fabric printing
and dyeing, with good printing and dyeing effects, and is washable and non-fading.
(4) Other resin finishing: It can improve the wear resistance and softness of fabrics.
(5) Parts: This product can be mixed with synthetic rubber such as butadiene rubber,
chloroprene rubber, etc. to form electromechanical components with high impact and high
strength molds, as well as hoses, hard tubes, rods, etc.
5. Applications in other fields
(1) Reflective sheet adhesive
Due to the good dispersibility of polyvinyl butyral for colorants, transparency and adhesion
to plastic films, plastic films coated with polyethylene and glass bead solutions are used
in traffic control sheets and guide signs.
(2) Dye transfer ribbon ink
Due to the good dispersibility of polyvinyl butyral for dyes, inks and sublimation dyes based
on polyvinyl butyral resin are applied to plastic films, and the dyes are transferred to
surface-treated paper by thermal sublimation.
(3) Electronic adhesives
This product contains hydroxyl, vinyl acetate and butyraldehyde groups and has high bonding
properties. Phenolic resin is added to the ethanol solution of this product to make an
adhesive that can be used for a long time at 120℃. It has strong adhesion to metal, wood,
leather, glass, fiber, and ceramics; it can be used to manufacture fiberglass, replacing
non-ferrous metals such as steel, aluminum, and copper; the adhesive made by adding this
product and a curing agent to epoxy resin is often used for bonding and assembling
electronic instrument components, bonding metal to porous materials, emergency repairs, etc.
It can also be used in the field of electronic ceramics. In the development of ceramic
integrated electronic circuits, this product with medium viscosity and low hydroxyl content
is used as a ceramic powder adhesive to obtain the original strength of ceramics. It can
also be used as a magnetic powder adhesive. (4) Copper foil adhesive for copper clad
laminates This product is combined with phenolic resin to produce copper foil adhesive for
the production of copper clad laminates. It has good peel strength and soldering temperature
resistance and is widely used. (5) Self-adhesive paint This product is the main raw material
for self-adhesive enameled wire paint. After the various coil windings used in motors,
electrical appliances, and instrument electrodes are wound and formed using this enameled
wire, as long as they are heated for a few minutes at a certain temperature or treated with
an appropriate solvent, the coils can be self-adhesive without the need for dipping or
drying.
(4) Copper foil adhesive for copper clad laminates This product is combined with phenolic
resin to produce copper foil adhesive for the production of copper clad laminates. It has
good peel strength and soldering temperature resistance and is widely used.
(5) Self-adhesive paint This product is the main raw material for self-adhesive enameled wire
paint. After the various coil windings used in motors, electrical appliances, and instrument
electrodes are wound and formed using this enameled wire, as long as they are heated for a
few minutes at a certain temperature or treated with an appropriate solvent, the coils can
be self-adhesive without the need for dipping or drying.
What is PVB Resin?
Polyvinyl butyral resin is a solvent-based resin synthesized from polyvinyl alcohol (PVA)
and butyraldehyde in an acetal reaction under the action of a catalyst.PVB resins have a
range of superior physical and chemical properties, including high transparency,
elasticity, toughness, alkali resistance, oil resistance, flexibility, low-temperature
impact resistance, etc. In addition, PVB resins have good adhesion to metals, ceramics,
plastics, leather, and wood and exhibit good adhesion to other resins (e.g., epoxy
resins, phenolic resins, etc.). In addition, PVB resins have good adhesion to metals,
ceramics, plastics, leatherwood, etc., and good compatibility with other resins (e.g.,
epoxy resins, phenolic resins, etc.)
What is PVB Resin used for?
Safety glass manufacturing: PVB resin is an interlayer material used in the manufacture
of safety glass for automobiles and buildings. When glass is impacted, PVB film prevents
glass fragments from flying and maintains the integrity of the glass, increasing
safety.
Coatings and Inks: PVB resins are used as components in primers, baking paints, wood
finishes, and printing inks, providing excellent adhesion and weathering
resistance.
Electronics & Electrical: PVB resins can be used as binders for electronic ceramics and
printed circuit boards, as well as modifiers for hot melt adhesives to improve product
stability and reliability.
Textile processing: PVB resin can be used to waterproof textiles, providing excellent
waterproofing and anti-pollution properties. It creates strong adhesion with various
fiber materials, allowing textiles to maintain their original softness and
breathability.
Other adhesive applications: PVB resin can also be used as an adhesive between metal and
metal, metal and plastic, providing good adhesion and weather resistance.
Ceramic powder processing: PVB resin can quickly dissolve in most polar and non-polar
solvents due to its special particle porosity and surface properties, making ceramic
powder obtain good strength and softness for processing and molding.
How is PVB Resin produced?
Raw material preparation: After specific quality checks and pretreatment of the two raw
materials, polyvinyl alcohol (PVA) and butyraldehyde, add catalysts, and stabilizers to
promote and control the acetalization reaction.
Dissolution and filtration: the raw materials and additives are mixed and gradually
converted to liquid form under heating conditions. The solution is then passed through a
filtration unit that removes impurities and solid particles to ensure the purity of the
resin.
Degassing and cooling: The filtered resin solution is degassed to remove air bubbles and
excess water. The degassed resin solution is then passed through a cooling unit and
cooled to a suitable temperature for subsequent processing and molding.
Extrusion & Drawing: The cooled resin solution is extruded and stretched to the required
size and thickness using a drawing machine to form the PVB film.
Curing & Cutting: The drawn PVB film is cured by high temperature and pressure to
cross-link the resin molecules in the solid state, increasing the strength and
durability of the film. The cured PVB film is then cut by cutting machines to the
required size for subsequent use.
How is PVB Resin packaged and stored?
Packaging: PVB resins should be packaged in well-sealed packaging materials that are
shielded from sunlight, such as ziplock bags or drums, to prevent the ingress of air,
moisture, and other contaminants and damage from ultraviolet rays in sunlight.
Storage: PVB resin should be stored in an environment with stable temperature and
humidity, and the storage area should be kept clean to avoid dust, impurities, and other
contaminants from entering the package.
What are the precautions for the use of PVB Resin?
PEnsure that the operating area has good ventilation conditions and avoid prolonged
contact with resin or inhalation of dust generated by it to reduce irritation to the
respiratory tract and skin.
When handling PVB resin, appropriate personal protective equipment, such as protective
glasses, protective gloves, and respirators, should be worn to prevent direct contact
with the resin with the skin and eyes and to reduce the risk of inhaling resin dust.
