Glass fiber binder

Abstract

The invention relates to the technical field of glass fiber binders, in particular to a glass fiber binder which comprises resin, a lubricant, a polymerization inhibitor, an initiator, an accelerant and a whitening agent, and the proportion of each component is as follows: 0.2-5% of the lubricant, 0.01-0.1% of the polymerization inhibitor, 0.5-3% of the initiator, 0-1% of the accelerant, 0.02-0.05% of the whitening agent and the balance of the resin. The adhesive is solid white powder and can be quickly cured under a high-temperature condition, so that the cooling and curing time consumption is reduced, the curing efficiency is greatly improved, and the production efficiency is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of glass fiber adhesive technology, and more specifically to a glass fiber adhesive. Background Technology

[0002] Glass fiber is a high-performance inorganic non-metallic material. It is an extremely fine fiber made from glass through high-temperature melting, drawing, winding, and weaving processes. It has advantages such as high strength, high modulus, light weight, good corrosion resistance, good electrical insulation, and good heat and sound insulation. It is an indispensable basic material in modern industry and high-tech industries, and also an important reinforcing material in the field of composite materials.

[0003] Glass fiber binders are chemical coatings specifically designed to bond glass fiber bundles together, forming a uniform, easily processed, and usable roving or felt. The binder is crucial for transforming brittle monofilaments into high-performance industrial materials. However, commonly used binders lack rapid curing performance under high-temperature conditions, and their particle size is not universally applicable. Larger particles result in insufficient binder dosage on the glass fiber surface, while smaller particles fail to form effective adhesion. Particle size directly affects the bonding effect. Summary of the Invention

[0004] To address the above problems, this invention provides a glass fiber adhesive that solves the issues of existing adhesives being unable to cure rapidly under high temperatures and particle size affecting the bonding effect.

[0005] To achieve the above objectives, the present invention provides a glass fiber adhesive comprising resin, lubricant, polymerization inhibitor, initiator, accelerator and whitening agent, wherein the proportions of each component are as follows: lubricant 0.2-5%, polymerization inhibitor 0.01-0.1%, initiator 0.5-3%, accelerator 0-1%, whitening agent 0.02-0.05%, and the balance being resin.

[0006] Furthermore, the lubricant includes one or more of zinc stearate, calcium stearate, and silica powder.

[0007] Furthermore, the polymerization inhibitor is one or both of naphthoquinone and tert-butylcatechol.

[0008] Furthermore, the initiator is one or both of benzoyl peroxide and dicumyl peroxide.

[0009] Furthermore, the accelerator is dimethylaniline.

[0010] Furthermore, the whitening agent is 2,2-(4,4-stilbene)bisbenzoxazole.

[0011] Furthermore, the adhesive is in powder form, and the particle size of the adhesive is 40-100 mesh.

[0012] The beneficial effects of this invention are: The adhesive in this invention is a solid white powder that can be rapidly cured under high temperature conditions, reducing cooling and curing time, greatly improving curing efficiency, and effectively improving production efficiency. The invention includes a polymerization inhibitor, which can effectively prevent the binder from polymerizing at room temperature and the resin powder from caking. An accelerator is added to this invention, which can effectively promote the rapid curing of the adhesive under high temperature conditions, raising the curing temperature to 150~230℃; The invention incorporates a whitening agent, which effectively prevents the adhesive from yellowing and aging during high-temperature curing, thus maintaining a good appearance. Attached Figure Description

[0013] To more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 The image shows the results of a rapid curing experiment. Detailed Implementation

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0016] The specific formula for preparing the glass fiber adhesive is as follows: Lubricant: 1.5% each of zinc stearate, calcium stearate, and silica powder; Polymerization inhibitor: 0.05% each of naphthoquinone and tert-butylcatechol; Initiator: 1% each of benzoyl peroxide and dicumyl peroxide; Accelerator: 1% dimethylaniline; Whitening agent: 0.05% 2,2-(4,4-stilbene)bisbenzoxazole, with the remainder being resin; Among them, resin preparation: fumaric acid or maleic anhydride is dehydrated with polyol under high temperature to undergo esterification reaction. After the esterification reaction is completed, multifunctional anhydride is added to further extend the chain and generate resin of the target molecular weight. The resin is cooled and crystallized, and then crushed and ground into powder at low temperature. According to the above raw material ratio, the mixture is thoroughly stirred and mixed in a mixing tank, dried thoroughly, and then pulverized to produce a glass fiber adhesive with a particle size of 50 mesh. Example 2

[0017] Adjust the raw material ratio of the glass fiber adhesive, otherwise remain the same as in Example 1: Lubricant: 2% each of zinc stearate and calcium stearate; Polymerization inhibitor: 0.1% naphthoquinone; Initiator: 2% benzoyl peroxide; Accelerator: 0.5% dimethylaniline; Whitening agent: 0.05% 2,2-(4,4-stilbene)bisbenzoxazole, with the remainder being resin; Example 3

[0018] Adjust the raw material ratio of the glass fiber adhesive, otherwise remain the same as in Example 1: Lubricant: 1% each of zinc stearate, calcium stearate, and silica powder; Polymerization inhibitor: 0.05% each of naphthoquinone and tert-butylcatechol; Initiator: 1.5% each of benzoyl peroxide and dicumyl peroxide; Accelerator: 0.3% dimethylaniline; Whitening agent: 0.02% 2,2-(4,4-stilbene)bisbenzoxazole, with the remainder being resin; Example 4

[0019] Adjust the raw material ratio of the glass fiber adhesive, otherwise remain the same as in Example 1: Lubricant: 5% silica powder; Polymerization inhibitor: 0.1% tert-butylcatechol; Initiator: 1.5% dicumyl peroxide; Accelerator: 0.8% dimethylaniline; Whitening agent: 0.04% 2,2-(4,4-stilbene)bisbenzoxazole, with the remainder being resin; A rapid curing experiment was conducted using the glass fiber adhesive prepared in Example 1. The specific experimental method is as follows: Rapid curing experiment: The adhesive powder was spread evenly on a 2mm aluminum plate, and the heating temperature was controlled. The main reaction process of the adhesive during heating is as follows: the peroxide in the adhesive decomposes at high temperature, and the oxygen free radicals generated by the decomposition initiate the cross-linking reaction of the double bonds in the unsaturated polyester resin, transforming the adhesive from a chain structure to a network structure polymer. Taking benzoyl peroxide as an example, the reaction process is as follows: The initiation process of benzoyl peroxide:

[0020] The curing process after initiation:

[0021] Observe and record the time taken for the adhesive powder to heat to a molten state and to solidify to a non-sticky state. Specific test results are as follows: Figure 1 ; according to Figure 1It can be seen that the time from heating to melting and solidification to non-stickiness is negatively correlated with the heating temperature. The higher the temperature, the shorter the time from melting and solidification to non-stickiness. This indicates that the glass fiber adhesive of the present invention can be rapidly cured under high temperature conditions without cooling the glass fiber, thereby effectively improving production efficiency.

[0022] The glass fiber adhesives prepared in Examples 1-4 were subjected to performance testing experiments. The specific experimental methods are as follows: Performance testing experiment: The binder powder was made into a 1mm thick powder film, which was placed between two layers of fiberglass plates. Fiberglass plates were made using a vacuum infusion process. The interlaminar shear strength was tested. The blank sample did not contain any binder. The test results are shown in Table 1 below. Table 1 Shear strength test results As can be seen from Table 1 above, the experimental samples treated with the glass fiber adhesives prepared in Examples 1 to 4 have significantly higher shear strength than the blank samples, indicating that the adhesives have good compatibility with both glass fibers and resins and have a good bonding effect on glass fibers.

[0023] The preferred and optional technical means disclosed in this invention, except as otherwise specified and as further defined as one preferred or alternative technical means being another, can be arbitrarily combined to form several different technical solutions. Therefore, equivalent variations made according to the claims are still within the scope of this invention.

Claims

1. A glass fiber binder characterized by, The components include resin, lubricant, polymerization inhibitor, initiator, accelerator, and whitening agent, and the proportions of the components are respectively 0.2-5% lubricant, 0.01-0.1% polymerization inhibitor, 0.5-3% initiator, 0-1% accelerator, 0.02-0.05% whitening agent, and the rest is resin.

2. The glass fiber binder of claim 1, wherein The lubricant includes one or more of zinc stearate, calcium stearate, and silicon powder.

3. The glass fiber binder of claim 1, wherein The polymerization inhibitor is one or both of naphthoquinone and t-butyl catechol.

4. The glass fiber binder of claim 1, wherein, The initiator is one or both of benzoyl peroxide and dicumyl peroxide.

5. The glass fiber binder of claim 1, wherein The accelerator is dimethyl aniline.

6. The glass fiber binder of claim 1, wherein, The whitening agent is 2,2- (4,4-diphenylstyryl) bisbenzoxazole.

7. The glass fiber binder of claim 1, wherein The adhesive is in powder form, and the particle size of the adhesive is 40-100 mesh.

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