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AI Overview
Water-based, blocked crosslinkers are
used in coatings, adhesives, and other applications to improve properties like durability, adhesion, and chemical resistance
.
They are typically based on isocyanates, which are blocked to be stable in water until cured, usually by heat.
Blocked isocyanates are then deblocked and react with the polymer to create a crosslinked network.
Key Features and Benefits:
-
Water-based:
Allow for the creation of environmentally friendly and low-VOC systems.
-
Blocked:
Ensures the crosslinker is stable in the water-based system until heat is applied, allowing for one-component systems and controlled reactivity.
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Crosslinking:
Improves properties like durability, chemical resistance, and adhesion.
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Versatile:
Used in various applications including coatings, adhesives, and textile treatments.
Types and Examples:
-
A common type of blocked crosslinker, with various aliphatic and aromatic options available.
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A range of water-based blocked isocyanate dispersions from UBE Corporation , used as crosslinkers and adhesion promoters.
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Water-based dispersions of polyisocyanates from Aquaspersions , suitable for polyurethane dispersions.
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A range of water-based blocked crosslinkers from MAFLON S.p.A , used in various textile and coating applications.
How they work:
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1. Blocking:The isocyanate groups are blocked with a blocking agent (e.g., amine, oxime) to prevent premature reaction.
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2. Dispersing:The blocked crosslinker is dispersed in water along with the polymer system.
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3. Unblocking:Heat is applied, causing the blocking agent to dissociate and releasing the active isocyanate groups.
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4. Crosslinking:The reactive isocyanate groups react with the polymer, forming a network of crosslinked chains.
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Trixene® Aqua Blocked Isocyanates - UBE CorporationFormulation benefits. Easy to formulate stable 1K systems under low shear. Applicable by e.g. spraying, dipping, roller/knife/curt...UBE Corporation
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AQUALINK® Crosslinkers - AquaspersionsOur AQUALINK® crosslinkers are water-based dispersions of either aliphatic or aromatic polyisocyanates partially blocked with amin...Aquaspersions
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CROSSLINKERS – MAFLON S.p.AHYDROSIN® C-20 Water-based and DMP-blocked crosslinking agent. It can be used in the curing of polyurethane and acrylic dispersion...MAFLON S.p.A
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AQUALINK® Crosslinkers
Aquaspersions
https://aquaspersions.com
› product › aqualink-crosslin...
Aquaspersions
https://aquaspersions.com
› product › aqualink-crosslin...
Our AQUALINK®
crosslinkers
are
water
-
based
dispersions of either aliphatic or aromatic polyisocyanates partially
blocked
with amines.
CROSSLINKERS
MAFLON S.p.A
https://maflon.com
› lines › crosslinkers
MAFLON S.p.A
https://maflon.com
› lines › crosslinkers
HYDROSIN® C-22 Water-based and DMP-blocked crosslinking agent
. It can be used in the curing of polyurethane and acrylic dispersion, especially for cationic ...
Trixene® Aqua Blocked Isocyanates
UBE株式会社
https://www.ube.com
› ube › chemical › urethane-systems
UBE株式会社
https://www.ube.com
› ube › chemical › urethane-systems
Our range of
water-based blocked isocyanate dispersions can be used as crosslinkers
and adhesion promoters for coatings and finishes on flexible and hard ...
Waterbased Blocked Isocyanates | Coatings
TRiiSO
https://www.tri-iso.com
› ... › Blocked Isocyantaes
TRiiSO
https://www.tri-iso.com
› ... › Blocked Isocyantaes
Waterbased Blocked Isocyanates are thermally labile crosslinkers
in 1K polyurethane coatings. TRiiSO distributes additives that can be used to produce ...
VESTANAT®
Evonik Crosslinkers
https://crosslinkers.evonik.com
› attachment
Evonik Crosslinkers
https://crosslinkers.evonik.com
› attachment
PDF
Is a liquid blocked crosslinker
for polyisocyanate resins based on a cycloaliphatic diamine. The product exhibits a very low reactivity towards isocyanate ...
Imprafix® | Isocyanate crosslinkers & additives
Covestro
https://solutions.covestro.com
› brands › imprafix
Covestro
https://solutions.covestro.com
› brands › imprafix
Imprafix® 2794.
Waterbased
aliphatic
blocked
polyisocyanate.Imprafix® 2794 is
crosslinker
with improved reactivity and thermostability (yellowing). · Imprafix® ...
H-1003 Blocked Isocyanate Crosslinker
SIOResin
https://www.sioresin.com
› additive › h-1003-waterbor...
SIOResin
https://www.sioresin.com
› additive › h-1003-waterbor...
H-1003 is a waterborne, non-ionic, blocked isocyanate curing agent
(crosslinker) designed to enhance the performance of coatings in a variety of applications.
water based blocked crosslinker AH-A05-1
waterbornepud.com
https://www.waterbornepud.com
› water-based-blocked-...
waterbornepud.com
https://www.waterbornepud.com
› water-based-blocked-...
AH-1704-11 is
water based
polyurethane dispersion, designed for fabric and fiberglass surface treatment applications like fiber dip-coating, functional ...
Trixene® Blocked Isocyanates | UBE Corporation
UBE株式会社
https://www.ube.com
› ube › chemical › urethane-systems
UBE株式会社
https://www.ube.com
› ube › chemical › urethane-systems
Trixene blocked crosslinkers
enable formation of highly flexible coatings with superior durability, impact resistance, weather resistance, adhesion.
People also ask
What is the blocking agent for isocyanates?
A common blocking agent is
ε -caprolactam
. In this way, blocked isocyanates require curing temperatures in the range of 170 – 200 ° C . Other blocking agents include malonic acid diethyl ester, 2,4-dimethyl-3-pentanone oxime or 2,6-dimethyl-4-heptanone oxime, which cure at lower temperatures.
Blocked Isocyanate - an overview | ScienceDirect Topics
ScienceDirect.com
https://www.sciencedirect.com
› topics › engineering › b...
ScienceDirect.com
https://www.sciencedirect.com
› topics › engineering › b...
What is a crosslinker used for?
Cross-linker
increases the viscosity of gelling agents by connecting the separate gel polymers together
. Cross-linker significantly increases the viscosity of linear gel by increasing the molecular weight of the base polymer by linking multiple molecules together.
Crosslinker - an overview | ScienceDirect Topics
ScienceDirect.com
https://www.sciencedirect.com
› topics › engineering › c...
ScienceDirect.com
https://www.sciencedirect.com
› topics › engineering › c...
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Polyvinyl alcohol-waterborne blocked-based polyurethane ...
ScienceDirect.com
https://www.sciencedirect.com
› article › abs › pii
ScienceDirect.com
https://www.sciencedirect.com
› article › abs › pii
by Y Liu
2021
Cited by 19
—
Introduce the end-blocked structure into the
water-based functional polyurethane segments
applied as a “latent cross-linker” for surface ...
People also ask
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