What is the role of coupling agent? Silane coupling agent use, adding amount, coupling agent use

Silane coupling agent is known as “industrial MSG”, which can form molecular bridges between polymers and inorganic substrates, increase bond strength and improve the performance of composite materials. Silane coupling agent is widely used in adhesives, coatings, plastic and rubber products, electronic materials, transportation and other industries.

Silane coupling agent addition

Silane coupling agent is generally 0.3% to 5% of the total amount of inorganic filler, if the number of inorganic filler mesh is large, the amount can be increased appropriately, it is worth noting that the silane coupling agent is not to add the more the better, add too much, it may lead to a reduction in the mechanical strength of the material.

Silane coupling agent using method

1 Silane coupling agent pretreatment filler. Silane coupling agent treatment of silica micropowder, glass fiber, graphene, mica powder and other mineral filler, filler and silane coupling agent together into the mixer, generally stirring in 35 ~ 60 minutes, filler treatment should be in the drying.

2.Silane coupling agent and filler can be added into resin system directly.

3.Silane coupling agent hydrolysis method. The silane coupling agent is hydrolyzed first, and then the inorganic filler is introduced into the hydrolyzed solution of silane coupling agent. Silane coupling agent hydrolysis solution is usually deionized water and silane coupling agent, ethanol in accordance with a certain ratio mixed together, fully hydrolyzed to deal with inorganic filler.

Types of silane coupling agents

Common types of models are silane coupling agent Nanda-42, silane coupling agent kh550 (amino silane), silane coupling agent kh560 (epoxy silane), silane coupling agent kh570 (methacryloyloxy), silane coupling agent A-151 (vinyl silane), and other models.

Silane coupling agent main use

Silane coupling agent can improve the adhesion of sealant in wet state, improve the dispersion of filler, and the abrasion resistance of products.
Silane coupling agent can make textiles soft and plump, improve its waterproof, and adhesion to dyes.

3.Silane coupling agent can improve the wettability of printing ink adhesion.

4.Silane coupling agent modification of a variety of fillers (silica micropowder, glass fiber, graphene, mica powder and other mineral fillers) in the resin to improve the compatibility of fillers and resins, infiltration, dispersion.

Cross-linked polyethylene: used for cross-linked polyethylene cables and hot water pipes to enhance strength, durability and service life.
Silane coupling agent is used in casting industry to improve the strength of resin sand.
Silane coupling application in plastic and rubber industry, to improve the mechanical strength, abrasion resistance, wet electrical properties and rheological properties of products. 8.
Other industries such as artificial stone industry, wood plastic industry, powder modification, etc.
Glass fiber, glass fiber reinforced plastic: Improve the wet state physical and mechanical strength of composite materials, wet state electrical properties, and improve the glass fiber agglomeration, protection and processing technology.
Adhesives and coatings: Improve the adhesion and weather resistance in wet state, improve the dispersion of pigments, wear resistance and cross-linking of resin.
11 Silane coupling agent in casting use, to improve the strength of resin sand. To achieve high, low outgassing.
Silane coupling agent in rubber industry use: To improve the mechanical strength, abrasion resistance, wet electrical properties and rheology of products.
Silane coupling agent in the sealant industry role use: to improve the adhesion of the wet state, improve the dispersion of filler, product wear resistance.

14 silane coupling agent in the textile industry, make the textile soft and plump, improve its waterproof, as well as the adhesion of dyes.

15 Printing ink: improve the adhesion of the wettability.

15 silane coupling agent in the filler surface treatment uses: in the resin to improve the compatibility of filler and resin, wettability, dispersion.

16 silane coupling agent in modified plastics uses such as cross-linked polyethylene: used in cross-linked polyethylene cables and hot water pipes to enhance the strength. Durability and service life.