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Tackifier, preparation method of tackifier and silicone rubber composition

A tackifier and mixture technology, applied in the direction of adhesives, polymer adhesive additives, adhesive additives, etc., can solve problems such as improving the bonding effect, and achieve good bonding effect, good stability, and mild conditions.

Active Publication Date: 2017-03-15
东莞市贝特利新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the tackifiers in the prior art can only improve the adhesion between silicone rubber and conventional thermoplastic resins such as acrylonitrile-butadiene-styrene (ABS) resin, polycarbonate (PC) resin, polyethylene (PE) resin, Polypropylene (PP) resin, polybutylene terephthalate (PBT) resin, polyethylene terephthalate (PET) resin, nylon (PA) resin, aromatic polyamide (aromatic PA) Adhesion of resin, polyphenylene oxide (PPO) resin, polyphenylene sulfide (PPS) resin, polyimide (PI) resin, acrylic resin and polyurethane (PU) resin, etc.; such as the Chinese publication CN102675884B The patent discloses a silicone rubber composition. Polysiloxane containing an aromatic structure and other coupling agents are added to the silicone rubber as a tackifier. The resulting composition can be molded in a short time and can improve the resistance to the above The adhesion of conventional thermoplastic resin substrates such as described carbonate, polybutylene terephthalate, polyethylene terephthalate and polyphenylene sulfide
However, for some difficult-to-adhesive resin substrates such as glass fiber reinforced polyamide resin (glass fiber PA), polyetherimide resin (PEI) and polyphenylene sulfone resin (PPSU), the introduction of the above tackifiers cannot Create or improve the bonding effect

Method used

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  • Tackifier, preparation method of tackifier and silicone rubber composition
  • Tackifier, preparation method of tackifier and silicone rubber composition
  • Tackifier, preparation method of tackifier and silicone rubber composition

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preparation example Construction

[0049] The present invention also provides a kind of preparation method of above-mentioned tackifier, comprises the following steps:

[0050] A) mixing organohydrogenpolysiloxane with a first solvent to obtain a first mixture;

[0051] B) mixing cyclic olefins, esters, catalysts and a second solvent to obtain a second mixture;

[0052] C) mixing and reacting the first mixture with the second mixture to obtain a tackifier;

[0053] In the step A), the organohydrogenpolysiloxane has the structure shown in formula (II):

[0054]

[0055] Among them, R 1 selected from methyl, ethyl or phenyl; R 2 is hydrogen; 20≤n≤70;

[0056] In the step B), the cycloalkene is cyclopentene, cyclohexene, 3-vinylcyclohexene, 4-vinylcyclohexene, 5-dicycloheptene, 4-cyclooctene, 4 - vinylcyclooctene, 1,5-cyclooctadienyl or vinylnorbornene; said esters are methyl methacrylate, allyl methacrylate or glycidyl methacrylate.

[0057] According to the present invention, the organohydrogenpolysiloxan...

Embodiment 1

[0083] Toluene (113.1 g) and organohydrogenpolysiloxane (113.1 g, 0.05 mol) were charged into a 500 mL four-necked flask equipped with a reflux condenser, a thermometer, a dropping funnel, and a mechanical stirrer, heated to 80° C., and A mixture of vinyl norbornene (30.05g, 0.25mol), methyl methacrylate (25.03g, 0.25mol), Karstedt catalyst (0.34g, concentration 0.5%) and toluene (55.08g) was added dropwise within 30min. After the addition was completed, the reaction was carried out at a constant temperature of 80° C. for 3 h to obtain the reaction product. The reaction product was stirred and cooled to room temperature, added activated carbon (22.1 g) baked at 120 ° C for 3 h, stirred for 2 h, filtered; A transparent tackifier with a structure of formula (a);

[0084]

[0085] The bonding effect of the obtained tackifier of formula (a) was tested, and the test method was as follows: 100 parts of silicone rubber and 1 part of tackifier of formula (a) were mixed, and stirre...

Embodiment 2

[0088] Toluene (304.2g) and organohydrogenpolysiloxane (304.2g, 0.1mol) were charged into a 1L four-necked flask equipped with a reflux condenser, a thermometer, a dropping funnel and a mechanical stirrer, heated to 70°C, and A mixture of vinyl norbornene (48.08 g, 0.4 mol), allyl methacrylate (50.46 g, 0.4 mol), Karstedt catalyst (0.64 g, concentration 0.5%) and toluene (98.54 g) was added dropwise within 1 h, After the dropwise addition was completed, the reaction was carried out at a constant temperature of 70° C. for 3 h to obtain a reaction product. The reaction product was stirred and cooled to room temperature, added activated carbon (41.6g) baked at 150°C for 3h, stirred for 3h, and filtered; then the resulting material was desolventized at 130°C and a vacuum of 40mmHg to obtain 342.33g of A transparent tackifier with a formula (b) structure;

[0089]

[0090] According to the method of Example 1, the bonding effect of the tackifier of formula (b) on the silicone r...

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Abstract

The invention provides a tackifier with a structure shown as a formula (I), wherein R1 is selected from methyl, ethyl or phenyl; R2 is hydrogen; R3 is selected from cyclopentenyl, cyclohexenyl, 3-cyclohexene ethyl, 4-cyclohexene ethyl, 5-bicycloheptenyl, 4-cyclooctenyl, 4-cyclooctenyl ethyl, 1,5-bicyclooctenyl or norbornylene ethyl; R4 is selected from methyl methacrylate, allyl methacrylate or glycidyl methacrylate; each of a, b and c is more than or equal to 1; a+b+c is more than or equal to 20 and less than or equal to 70. The tackifier disclosed by the invention is capable of obviously improving the bonding effect between silicone rubber and hard bonding resin base materials.

Description

technical field [0001] The invention relates to the technical field of bonding materials, in particular to a tackifier, a preparation method thereof and a silicone rubber composition. Background technique [0002] Silicone rubber has been widely used in various fields due to its excellent properties such as high and low temperature resistance, weather aging resistance, ozone resistance, electrical insulation, flame resistance, non-toxicity, non-corrosion and physiological inertness, such as breathing masks for medical and diving equipment Sealing rings for various electrical appliances (such as ovens and microwave ovens), automotive parts such as high-voltage sheaths for spark plugs and seals for other connectors. In these many applications, silicone rubber is usually bonded to metal substrates or resin substrates for sealing or protection. However, as far as ordinary silicone rubber is concerned, its adhesion to substrates is often poor. Peels easily from substrate. [00...

Claims

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Application Information

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IPC IPC(8): C08G77/38C09J183/04C09J11/08
Inventor 张虎叶文波孟周殷永彪王全
Owner 东莞市贝特利新材料有限公司
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