High-stretching-ratio-resisting adhesive for cable shielding film
A cable shielding and elongation technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., to achieve the effect of no cracks, increased adhesion, and good flexibility
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Embodiment 1
[0030] The high-stretch-resistant adhesive for cable shielding film provided in this example includes a main agent and a curing agent, and the mass ratio of the main agent and curing agent is 100:3, wherein the main agent is a polyurethane macromolecule The molecular weight is 19600, the hydroxyl value is 5.9mgKOH / g, the solid content is 50%, and the rotational viscosity at 25°C is 1200mPa.s.
[0031] The polyurethane macromolecule is mainly synthesized by using polyester polyol, isocyanate, ethyl acetate, catalyst a and defoamer as raw materials.
[0032] (1) Synthesize polyester polyol first
[0033] Polyester polyols are mainly synthesized from neopentyl glycol, diethylene glycol, 1,2-propylene glycol, small molecule polyols, terephthalic acid, isophthalic acid, sebacic acid and catalyst b, and the hydroxyl groups of polyester polyols The value is 40~50mgKOH / g, acid value<2mgKOH / g, glass transition temperature≤-15℃.
[0034] Wherein the mass parts of neopentyl glycol, die...
Embodiment 2
[0050] The high-stretch-resistant adhesive for cable shielding film provided in this example includes a main agent and a curing agent, and the mass ratio of the main agent and curing agent is 100:3, wherein the main agent is a polyurethane macromolecule The molecular weight is 22170, the hydroxyl value is 5.6mgKOH / g, the solid content is 50%, and the rotational viscosity at 25°C is 1300mPa.s.
[0051] The polyurethane macromolecule is mainly synthesized by using polyester polyol, isocyanate, ethyl acetate, catalyst a and defoamer as raw materials.
[0052] (1) Synthesize polyester polyol first
[0053] Polyester polyols are mainly synthesized from neopentyl glycol, diethylene glycol, 1,2-propylene glycol, small molecule polyols, terephthalic acid, isophthalic acid, sebacic acid and catalyst b, and the hydroxyl groups of polyester polyols The value is 40~50mgKOH / g, acid value<2mgKOH / g, glass transition temperature≤-15℃.
[0054] Wherein the mass parts of neopentyl glycol, die...
Embodiment 3
[0071] The high-stretch-resistant adhesive for cable shielding film provided in this example includes a main agent and a curing agent, and the mass ratio of the main agent and curing agent is 100:3, wherein the main agent is a polyurethane macromolecule The molecular weight is 24380, the hydroxyl value is 4.8mgKOH / g, the solid content is 50%, and the rotational viscosity at 25°C is 1300mPa.s.
[0072] The polyurethane macromolecule is mainly synthesized by using polyester polyol, isocyanate, ethyl acetate, catalyst a and defoamer as raw materials.
[0073] (1) Synthesize polyester polyol first
[0074] Polyester polyols are mainly synthesized from neopentyl glycol, diethylene glycol, 1,2-propanediol, small molecule polyols, terephthalic acid, isophthalic acid, adipic acid and catalyst b, and the hydroxyl groups of polyester polyols The value is 40~50mgKOH / g, acid value<2mgKOH / g, glass transition temperature≤-15℃.
[0075] Wherein the mass parts of neopentyl glycol, diethylen...
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