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Method for preparing polyurethane-modified organosilicon double-component room-curing elastomer adhesive

A technology of polyurethane modification and room temperature curing, which is applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc. It can solve the problems of poor high temperature resistance of polyurethane and poor bonding of silicone materials, etc., and achieve good High and low temperature resistance, reduced material cost, and short production cycle

Active Publication Date: 2015-11-04
道一高分子聚合物(宁波)有限公司
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Problems solved by technology

[0007] Aiming at the shortcomings of poor high temperature resistance of polyurethane and poor bonding of silicone materials, the purpose of this invention is to provide a method for preparing polyurethane modified silicone two-component room temperature curing elastomer adhesive

Method used

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with specific embodiments.

[0026] The present invention prepares the method for two-component room temperature curing elastomeric adhesive comprising the following steps:

[0027] (1) Preparation of raw materials: The mixture of hydroxypropyl-terminated silicone oil (relative average molecular weight Mw=1000) and glycerol was vacuum dehydrated at 100°C~110°C for 3~4h before the reaction started to obtain Hydroxyl-terminated (-OH) components with water content below 0.05%. The mixing mass ratio of the two is 20~22:1.

[0028] (2) Preparation of component A: Aromatic polyisocyanate, hydroxyl-terminated (-OH) components (terminated hydroxypropyl silicone oil and glycerol) according to functional group n (NCO / OH) = 1.8~1.82, catalyst dilauric acid The amount of dibutyltin added is 0.05%~0.06% of the total mass of component A, and the material is discharged after reacting at a reaction tempera...

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Abstract

The invention discloses a method for preparing a polyurethane-modified organosilicon double-component room-curing elastomer adhesive, which comprises the following steps: (1) uniformly mixing hydroxypropyl-terminated silicone oil and glycerol, and dehydrating to obtain a hydroxyl-terminated (-OH) component; (2) reacting aromatic polyisocyanate, the hydroxyl-terminated (-OH) component and dibutyltin dilaurate to obtain a component A; (3) adding vapor-phase silica white, carbon black and talcum powder into the container filled with hydroxy silicone oil and dihydroxy polysiloxane, adding a catalyst, adding 3-aminopropyl triethoxy silane, finally adding a defoaming agent, uniformly mixing, and drying to obtain a component B; and (4) uniformly mixing the component A and component B in a mass ratio of 12:(23.5-24), and curing at room temperature for 4-5 hours. The elastomer adhesive prepared by the method has the advantages of favorable tear resistance, excellent high / low temperature resistance and excellent binding property. The preparation method is easy to operate and accessible in raw materials, and lowers the preparation cost.

Description

technical field [0001] The invention relates to a method for preparing polyurethane-modified organic silicon two-component room-temperature curing elastomer adhesive with high temperature resistance, low temperature resistance, good elasticity and excellent performance, and belongs to the technical field of new chemical materials. Background technique [0002] Polyurethane (PU) is the abbreviation of polyurethane (polyurethane). All compounds containing many repeating carbamate (-NH-COO-) or ureido (-NH-CO-NH) groups on the polymer backbone are collectively referred to as polyurethanes. [0003] Polyurethane is a block polymer consisting of soft and hard segments. The soft segments of polyurethane macromolecules are generally composed of flexible segments such as long-chain polyols or polyethers, which are in the shape of random coils. The polyurethane hard segment (rigid segment) is a rigid chain consisting of aryl, carbamate, and substituted urea groups obtained from d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J11/04C09J11/06C08G18/65C08G18/61C08G18/32C08G18/12C08G18/24C08G18/18
Inventor 罗宏李新跃勾雪功刘凯
Owner 道一高分子聚合物(宁波)有限公司
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