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Production of powder cementing agent for glass bat

A powder binder, glass fiber technology, applied in the direction of binder types, ester copolymer binders, non-woven fabrics, etc. Head blockage and other problems, to achieve the effect of low powder moisture content, high solid content, and improved mechanical tensile strength

Inactive Publication Date: 2005-09-28
南京彤天广元高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because polymer emulsions with high solid content will cause clogging of the centrifugal head, and the high-temperature hot air above 100°C in the spray dryer makes it particularly difficult to form the "polymer emulsion"
Because the emulsion particles with high solid content are easy to stick to the wall of the centrifuge at high temperature, the light ones will make the powder rate very low, and the heavy ones will form a thick layer of binder, and solid powder cannot be obtained at all.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Compounding of polymeric emulsifier: In this embodiment, the polymeric (reactive) emulsifier is sodium methacrylate, and the non-ionic emulsifier is OP-8 with an HLB value of 8. Compounding An emulsifier solution is prepared. As shown in Table 1

[0019] Material name

Weight (g)

Sodium methacrylate

30

OP-8

10

Deionized water

460

[0020] 2) Configure thermal decomposition initiator: the initiator used in this embodiment is an aqueous solution of potassium persulfate, and the total addition amount is controlled to account for 0.5% of the total reaction monomer content.

[0021] 3) Synthesis of core layer polymer emulsion: Pre-emulsify the reaction monomers as shown in Table 2. Among them, styrene and methyl methacrylate are hard monomers, and isooctyl acrylate is a soft monomer. The weight ratio of the soft and hard monomers is 1:1.5. The pre-emulsified monomer and the initiator solution are gradually added ...

Embodiment 2

[0031] 1) Compounding of polymeric emulsifier: In this example, the polymeric (reactive) emulsifier is sodium methacrylate and the nonionic emulsifier is OP-50 with an HLB value of 18.5. A polymeric emulsifier solution is prepared. As shown in Table 6

[0032] Material name

Weight (g)

Sodium methacrylate

20

OP-50

20

Deionized water

460

[0033] 2) Configuration of thermal decomposition initiator: the initiator used in this embodiment is ammonium persulfate aqueous solution, and the total addition amount is controlled to account for 0.8% of the total reaction monomer content.

[0034] 3) Synthesis of core layer polymer emulsion: Pre-emulsify the reaction monomers as shown in Table 7. Among them, vinyl acetate is the hard monomer, and butyl acrylate is the soft monomer. The weight ratio of soft and hard monomers is 1:1. The pre-emulsified monomer and the initiator solution were gradually added dropwise into a...

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PUM

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Abstract

A method of preparing powdery bonding material for blankets of glass precursor fibers. It comprises, introducing anion polymeric emulsifying agent, preparing polymer emulsion with high content of solids, low viscosity and high stability by core-sheath polymerization, then obtaining powdery bonding material. The product has excellent bonding ability and cohesion, effectively improves mechanical pulling strength of glass precursor fiber.

Description

technical field [0001] A method for preparing a powder binder for glass fiber precursor mats relates to the field of powder binder preparation, in particular to the field of powder binder preparation for glass fiber precursor mats. Background technique [0002] Glass fiber chopped strand mat or continuous mat is formed by bonding dispersed glass fiber chopped strands, continuous glass fiber strands and other non-woven glass fiber materials through glass fiber binder at a certain temperature. Binders for glass fiber precursor mats can be divided into two categories according to their shape: powder type and emulsion type. The characteristics of the powder type binder are that the resin penetration speed of the felt sheet is fast, but the mechanical tensile strength of the felt body is small, and its production process is complicated. In the production process, the molten polymer needs to be cooled, crushed, ground, sieved, etc. step. The whole process consumes a lot of energ...

Claims

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Application Information

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IPC IPC(8): C08F2/24C08F20/10C09J133/08D04H13/00
Inventor 程军黄欣
Owner 南京彤天广元高分子材料有限公司
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