Hot Melt Adhesives

Product Introduction

Copolymers are polymers formed by polymerization of two or more different monomers. Unlike homopolymers (such as polyethylene) formed by polymerization of a single monomer, copolymers have more complex molecular structures and diverse properties.

Chemical Nature：
Copolymer based on: 1-vinyl-2-pyrrolidone, vinyl acetate

Molecular Formula:

page-363-182

Appearance：
The solution is clear and slightly yellowish.
The powder products are white.

Odor：
Slight characteristic odor

Technical Data

LUVITEC VA 64P	K value* (1 % in water)	Solids content in %*	PH value of a 10% aquous solution*	Residual NVP in ppm*	Residual VA in ppm*
LUVITEC VA 64P	26 – 34	95 – 100	3.8 – 6	≤ 100	≤ 300

Copolymer Advantages

Solubility advantage

It has good solubility and can be adapted to a variety of solvent systems, which is conducive to processing and application. For example, it can be quickly and evenly dispersed during drug preparation and cosmetic production.

Stability advantage

The molecular structure is stable, ensuring the stable performance of the product during storage and use. For example, the drug sustained-release carrier can be accurately controlled and the industrial material can be durable.

Film-forming advantage

It can form a tough and highly adhesive film, and has excellent performance in coatings, hair styling and other fields, and can effectively protect and shape.

Multifunctional copolymerization advantage

It is formed by copolymerization of different monomers, integrating the characteristics of multiple monomers, and can customize performance on demand. It is widely used in medicine, cosmetics, and industrial fields.

Application

Copolymers are widely used in hot melt adhesives. Their unique molecular structure gives hot melt adhesives good adhesion, flexibility and durability.The following is a detailed introduction:

for Hot Melt Adhesives

1. Improved Adhesion
Copolymers can enhance the adhesive properties of hot melt adhesives, allowing them to form stronger bonds between different substrates (such as plastics, metals, wood, fabrics, etc.). Common copolymers such as EVA (ethylene-vinyl acetate copolymer) have good flexibility and bonding ability and are widely used in packaging, assembly and electronic products.

2. Adjust the hardness and flexibility of hot melt adhesives
By changing the monomer ratio in the copolymer, the softness or hardness of the hot melt adhesive can be adjusted. For example, EVA can act as a softener in the formulation, making the hot melt adhesive have a certain elasticity, which is suitable for application scenarios that require flexible bonding.

3. Improved Heat and Weather Resistance
Certain copolymers (such as SIS, styrene-isoprene-styrene) have good heat and weather resistance, which can ensure that the hot melt adhesive remains stable at high temperatures. They also prevent aging problems caused by long-term exposure to sunlight, moisture or oxygen.

4. Optimized Processing Performance
The processing properties of hot melt adhesives (such as melt viscosity and curing speed) are affected by copolymers. By adding the right copolymer, the melting temperature and fluidity of the hot melt adhesive can be controlled to ensure that it can be efficiently applied to the required surface during the production process. This helps improve production efficiency and reduce the scrap rate caused by uneven bonding.

FAQ

1.What is copolymer hot melt adhesive?
Copolymer hot melt adhesive is an adhesive with copolymers (such as EVA, SIS, SEBS, etc.) as the main component, which is bonded by heating and melting and cooling and solidifying. The addition of copolymers can enhance the adhesion, flexibility and durability of hot melt adhesive.

2.What polymers are used in hot melt adhesive?
Common polymers include ethylene-vinyl acetate (EVA), polyamide, polyolefin, polyurethane, etc. These polymers melt at high temperatures and solidify rapidly after cooling to form a bonding effect.

3.What are the copolymers used for adhesives?
Including ethylene-vinyl acetate (EVA), styrene-isoprene-styrene (SIS) and styrene-ethylene-butylene-styrene (SEBS).

4.What are the ingredients of hot melt adhesive?
The main ingredients include base polymers (such as EVA, SIS, polyamide, etc.), tackifiers, antioxidants, fillers and additives. The base polymer provides the main adhesion of the adhesive, the tackifier can improve the bonding strength, and the antioxidant is used to extend the service life.

5.What are the raw materials of hot melt adhesive?
It mainly includes base polymers (such as EVA, SIS, polyurethane), tackifying resins (such as rosin, terpene resins), waxes (such as paraffin, microcrystalline wax), antioxidants, and some fillers and other additives.