產品資訊 - Two-component Polyurethane Sealant->building materials

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Hebei Ruida Engineering Rubber and Plastics Co., Ltd.

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Two-component Polyurethane Sealant

產品分類 :

建築及建材->其他->建材

產品規格

Model No:	1

Country	CN
Brand	RUIDA
Payment Term	L/C,T/T

產品描述

Polyurethane rubber and the prepolymer of polyurethane are the main components of polyurethane sealant. Polyurethane sealant can be divided into three kinds: heating curing polyurethane sealant, room temperature vulcanized polyurethane sealant and hot melt polyurethane sealant. And the room temperature vulcanized polyurethane sealant is divided into two kinds: one-component polyurethane and two-component polyurethane sealant. Two-component polyurethane sealant (double-component polyurethane sealant) is mainly used in the secondary sealing of hollow glass, and one-component polyurethane sealant is mainly used in the sealing of automobile.
Two-component polyurethane sealant includes A component and B component, and the two components react to cure. A component is milk white or light yellow viscous prepolymer of polyurethane. B component is black paste or liquid that is produced by curing agent and auxiliaries mixed and dehydrated. It has certain elasticity and cohesiveness after curing.
The classification of two-component polyurethane sealant:
It can be divided into two kinds according to the flowability: non-slumping and self-leveling.
It can be divided into two kinds according to the movement ability: 25 and 20.
It can be divided into two kinds according to the tensile modulus: high modulus (HM) and low modulus (LM).
Features:
Excellent wear-resisting performance.
Good softness at low temperature and good adhesion to a variety of materials.
Outstanding weather resistance, oil resistance and aging resistance.
Good elasticity and recovery ability.
Suitable for dynamic joints, deformation joints and expansion joints.
Disadvantages:
It cannot be resistant to heat for a long time, and may produce bubbles or cracks in high temperature environment.
Need to do base coating on most occasions.
Poor resistance to water, especially alkaline water.

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