Glass fiber impregnating compound for high-penetrability SMC (Sheet Molding Compound) as well as preparation method and application of glass fiber impregnating compound
A technology of glass fiber and sizing agent, which is applied in the field of glass fiber sizing agent for high-impregnation SMC, which can solve the problems that the resin cannot be impregnated and the impregnation performance of the glass fiber layer is not enough.
Active Publication Date: 2021-08-06
JUSHI GRP CO
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Problems solved by technology
In fact, when the glass fiber layer is generally thick, the resin is easily absorbed by the glass fiber on the surface layer, and the middle layer is very easy to produce white silk because it cannot touch enough resin. We call it resin impregnable, that is, glass fiber. The impregnation performance of the fiber layer is not enough
Method used
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Effect test
Embodiment 1～18
[0127] The preparation method of embodiment 1~18 is as follows:
[0128] S1: Add deionized water equivalent to 50 to 60 times the mass of the coupling agent in a clean container, then slowly add the pH regulator and dissolve it completely by stirring;
[0129] S2: Slowly add silane coupling agent and titanate coupling agent to the solution obtained in S1, and stir for 20 to 30 minutes after adding each coupling agent until the silane coupling agent and titanate coupling agent Disperse evenly and become a clear aqueous solution with no oil on the surface;
[0130] S3: dissolving the lubricant and coagulant in hot water at 70-80°C with 5-10 times the mass of each, stirring and diluting, adding to the aqueous solution obtained in step S2;
[0131] S4: Dilute the polyurethane-modified epoxy emulsion with water 6 to 10 times the volume of the polyurethane-modified epoxy emulsion to prepare an emulsion with an average particle size of the dispersed phase of 0.8-4.0 μm; the silane-m...
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The invention provides a glass fiber impregnating compound for high-penetrability SMC (Sheet Molding Compound). The impregnating compound comprises effective components and water, the solid content of the impregnating compound is 6%-16%; and the mass percentage of each component in the total mass of the effective components is as follows: 14 to 25 percent of a coupling agent, 3.0 to 6.0 percent of a lubricant, 54 to 72 percent of a film-forming agent, 4.0 to 14 percent of a coagulant and 2.0 to 6.0 percent of a pH value regulator, wherein the film forming agent is prepared from a polyurethane modified epoxy emulsion and a silane modified polyvinyl acetate emulsion, and the mass ratio of the polyurethane emulsion to the silane modified polyvinyl acetate emulsion is (1:3)-(1:10). The glass fiber yarn produced by coating the impregnating compound has good compatibility with polyester resin and good impregnating effect; and moreover, the glass fiber impregnating compound has obvious advantages in the aspect of immersion penetration performance, and is suitable for preparing SMC sheets with high glass fiber content, high viscosity and high thickness.
Description
technical field [0001] The present application relates to the technical field of glass fiber reinforced resin, in particular to a glass fiber sizing agent for SMC with high penetrability, a preparation method and application of the sizing agent. Background technique [0002] Since it was developed and used in the 1960s, sheet molding compound (hereinafter referred to as SMC) products have been widely used due to their advantages of light weight, high strength, corrosion resistance, low cost, strong industrial designability and high molding efficiency. It is widely used in construction, interior decoration, automobile, rail transit and many other fields. The preparation of SMC is to cut the special glass fiber plied yarn evenly on the PE film pre-coated with resin paste (including a certain proportion of polyester resin, curing agent and filler), and then cover it with another A layer of PE film coated with the same resin paste is then compacted through a series of rollers. ...
Claims
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Login to View More IPC IPC(8): C03C25/465C03C25/40
CPCC03C25/465C03C25/40
Inventor 杨国明章建忠陆琦刘阳张鑫张志坚
Owner JUSHI GRP CO