November 29, 2021 Longchang Chemical

C5 petroleum resin is a tackifying resin. It has occupied an important position as a tackifying resin.

Among them, the most used are hot melt adhesives, pressure sensitive adhesives, rubber tires and other fields. Petroleum resin is a petroleum resin suitable for hot melt adhesives, pressure sensitive adhesives and rubber tires. They have good compatibility with SIS, SBS, SEBS, SEPS and other styrene polymers, natural rubber, synthetic rubber and EVA, etc., and compatibility with natural tackifying resins (terpenes, rosin and their derivatives) It is also good, it can improve the various properties of the adhesive to varying degrees. In recent years, petroleum resins have gradually begun to gradually adopt the characteristics of high peeling bonding strength, good fast tack, stable bonding performance, moderate melt viscosity, good heat resistance, good compatibility with polymer matrix, and low price. Replace natural tackifying resin and occupy a prominent position.

The characteristics of C5 petroleum resin in adhesive system:

  1. C5 petroleum resin has good fluidity and can improve the wettability of the main material.
  2. C5 petroleum resin has good viscosity and outstanding initial viscosity.
  3. C5 petroleum resin has excellent aging resistance.
  4. The cohesive strength and peeling strength of C5 petroleum resin reach the best balance.
  5. The color of C5 petroleum resin is light.
  6. C5 petroleum resin has a transparent appearance, low odor and low volatile matter.

Hot melt adhesives are industrial adhesives with a wide range of applications, including the production of disposable sanitary products such as women’s sanitary napkins and baby diapers; carton sealing of food, beverages, and beer; woodworking furniture production; book binding; labels, The production of adhesive tape; the production of cigarette filter rods; the production of clothing and adhesive interlinings, etc. Hot melt adhesive must be matched with a tackifier in use to bond firmly. In recent years, the use of C5 petroleum resin as a tackifier has gradually become dominant.

The characteristics of C5 petroleum resin in the tire rubber field:

  1. C5 petroleum resin has excellent viscosity increasing
  2. C5 petroleum resin can play the role of softening and strengthening during processing, improving stretchability and anti-stripping property.
  3. C5 petroleum resin can significantly increase the viscosity, but does not affect the vulcanization time and physical properties after vulcanization.
  4. C5 petroleum resin avoids adhesion to processing machinery.
  5. C5 petroleum resin can help the filling material to be evenly distributed.

What is the role of petroleum resin in road marking paint?

What is a road marking paint? In fact, the paint used for marking and marking on the road is what we call road marking paint. There are mainly normal temperature type, heating type and melting type. The resin used for road marking paint mainly includes: acrylic resin, alkyd resin, chlorinated rubber modified alkyd resin, epoxy resin, petroleum resin, etc.

Compared with other resins, petroleum resin has the advantages of low price and excellent performance, and petroleum resin has good adhesion to concrete or asphalt pavement, and has abrasion resistance and water resistance. In addition, petroleum resin has good properties with inorganic substances. Affinity, easy coating, good weather resistance, fast drying, high firmness, petroleum resin can not only improve the physical and chemical properties of the coating, such as hardness, impact strength and bending, but also improve its UV and weather resistance The longest service life can be up to 3 years. The usage of petroleum resin road marking paint abroad accounts for 25%-30% of the total road marking paint.

The number average molecular weight of C5 petroleum resin is 300~3000. The main chain link of this type of resin is fatty structure, which has the characteristics of low acid value, good miscibility, water resistance, ethanol resistance and chemical corrosion resistance, and has the ability to adjust viscosity. Features such as good performance and thermal stability. C5 petroleum resin is prepared by removing cyclopentadiene, carbon six and other recombined components after separation and pretreatment, and carbon five with piperylene, isoprene and monoolefins as main components is the main raw material.

Hydrogenated C5 petroleum resin added to PU does not achieve the tackifying effect, and what is the reason for the small crystal lumps in the dispensing?

It may be due to the poor compatibility. C5 is non-polar, PU is polar, and the compatibility is not good. The compatibility is not completely crystallized at high temperature, and a small amount of crystals shows that a part of C5 has not been melted in. . I personally think that color 1 contains a large amount of ions, which improves the dissolution conditions of crystals. For example, the ions are complexed with part of C5, which enhances the polarity of C5 and improves the dissolution effect.

In sbs adhesives, C5 is mainly used for tackifying to increase the peel strength, and the amount is more than terpene resins. Will it powder?

C5 and C9 have different uses. The main C5 petroleum resin of C5 is more expensive than C9 resin because of its high peel bonding strength, good fast adhesion, stable bonding performance, moderate melt viscosity, and heat-resistant C5 resin.

What is the difference between C9 petroleum resin and C5 petroleum resin?

  1. C5 and C9 have different uses. C5 is mainly used for adhesives, pressure-sensitive adhesives, and road marking coatings.
  2. C9 petroleum resin is mainly paint, anti-corrosion coating, etc.
  3. C5 petroleum resin has high bonding strength, and C9 has low bonding strength.
  4. Carbon five has a small odor, and carbon nine has a large odor. C5 petroleum resin can be mixed with other petroleum resins or used as an additive. Because of its good compatibility with oils, greases and other synthetic resins, it can be dissolved in many solvents, and it can cooperate with other substances with good water resistance, acid resistance, low melting point and good adhesion. Therefore, it is better in many aspects. More and more applications.

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