Preparation method of solvent-based PU flocking glue

A flocking adhesive and solvent-based technology, which is applied in the preparation of solvent-based PU flocking adhesive and in the field of flocking adhesive, can solve the problems of difficult to effectively control flocking quality and increased viscosity, and meet the requirements of flocking wear resistance. Effect

Active Publication Date: 2019-03-29
苏州市陆氏新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the flocking glue used in PVC sealing strips is mainly a two-component system (that is, two-component polyurethane solvent glue). The usable time after mixing components A and B is generally 1 to 2 hours. Second, ready-to-use process; if the on-site management is chaotic, and the viscosity continues to increase after component A and component B are mixed, it is difficult to effectively control the flocking quality

Method used

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  • Preparation method of solvent-based PU flocking glue

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preparation example Construction

[0011] The preparation method of solvent-based PU flocking glue of the present invention, it comprises the following steps: (a) polyester diol, polyester triol and thermoplastic TPU are dissolved in the mixed solvent, and dehydration obtains the first mixture; The polyester The mass ratio of diol, polyester triol and thermoplastic TPU is 100:40~60:15~25; (b) Add liquefied MDI to the first mixture, mix well and seal it for several days, and adjust to solid The content is 38-43%, and the viscosity is 200-400cps; the NCO / OH value (molar ratio) in the above materials is 1.4-1.8. By mixing the first mixture of specific components with liquefied MDI and adjusting the solid content and viscosity of the product, it can be directly used in the flocking process of PVC sealing strips without on-site preparation, and the curing conditions meet the online flocking process (120℃@3~5min) (that is, high temperature fast curing) requirements, and meet the requirements of flocking wear resistan...

Embodiment 1

[0015] The present embodiment provides a kind of preparation method of solvent type PU flocking glue, it may further comprise the steps:

[0016] (a) 100 parts of polyester diol (usually polybutylene adipate, molecular weight is about 2000), 50 parts of polyester triol (molecular weight is about 400) and 20 parts of thermoplastic TPU (activation temperature 55~65℃) dissolved in a mixed solvent (cyclohexanone:butanone=1:2, volume ratio), and dehydrated to obtain the first mixture;

[0017] (b) Add 100 parts of liquefied MDI to the first mixture, and after sealing, shake and mix continuously for 10 to 15 hours with a shaker, then seal and let stand for 3 days, and adjust to a solid content of 38 to 43% and a viscosity of 200 ~400cps is enough.

Embodiment 2

[0019] The present embodiment provides a kind of preparation method of solvent-based PU flocking glue, and it is basically consistent with embodiment 1, and difference is: in step (a), polyester diol, polyester triol and thermoplastic TPU The addition amounts are 100 parts, 50 parts and 25 parts respectively.

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Abstract

The invention relates to a preparation method of a solvent-based PU flocking glue. The method comprises the following steps: (a) dissolving polyester diol, polyester triol and thermoplastic TPU in a mixed solvent, and performing dehydration to obtain a first mixture, wherein a mass ratio of the polyester diol to the polyester triol to the thermoplastic TPU is 100:(40-60):(15-25); and (b) adding liquefied MDI to the first mixture, sealing the obtained mixture, continuously mixing the sealed mixture by a shaker for 10-15 h, performing sealed standing for 3 d, and adjusting the solid content of the obtained mixture to 38-43% and the viscosity to 200-400 cps. The solvent-based PU flocking glue can be directly used in the flocking process of PVC sealing strips without on-site preparation, the curing conditions of the solvent-based PU flocking glue meet the requirements of the online flocking process (120 DEG C, 3-5 min), and the solvent-based PU flocking glue meets the flocking wear resistance requirements.

Description

technical field [0001] The invention belongs to the field of adhesives and relates to a flocking glue, in particular to a preparation method of a solvent-type PU flocking glue. Background technique [0002] Automotive flocking seals mainly include window side seals (water cut) and window glass run grooves. Their functions are to seal external wind and rain, prevent dust from entering, reduce noise and make glass slide more easily. At present, the flocking glue used in PVC sealing strips is mainly a two-component system (that is, two-component polyurethane solvent glue). The usable time after mixing components A and B is generally 1 to 2 hours. Second, the current matching and current use process; if the on-site management is chaotic, and at the same time after component A and component B are mixed, the viscosity will continue to increase, and the flocking quality will be difficult to effectively control. Contents of the invention [0003] The purpose of the invention is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C08G18/42C08G18/76
CPCC08G18/4202C08G18/4238C08G18/7671C09J175/06
Inventor 陆建明
Owner 苏州市陆氏新材料有限公司
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