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Pressure-sensitive adhesive silicone composition

A technology of silicone and composition, applied in the direction of adhesives, etc., can solve problems such as unsatisfactory, limited application of silicone PSA composition, energy cost, etc.

Active Publication Date: 2013-03-27
BLUESTAR SILICONES FRANCE SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] This composition is not satisfactory from the point of view of the shear strength of the composite obtained by crosslinking this composition
[0011] Moreover, difficulties in using silicone resins limit the application of silicone PSA compositions
This is because certain steps in the preparation of these silicone PSA compositions are carried out at high temperatures and last for several hours, implying significant energy costs

Method used

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  • Pressure-sensitive adhesive silicone composition
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  • Pressure-sensitive adhesive silicone composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] Example 1: Preparation of a pressure sensitive adhesive (PSA) composition according to the present invention

[0112] 500 g of MQ(OH) resin (A) and 255 g of toluene were introduced into the reactor, and then stirring was started at a speed of 110 rpm.

[0113] Organic silica gel (B) (255 g) was added in a small amount within 1 hour under stirring.

[0114] The heating bath worked, and when the temperature of the reaction mixture reached 113°C, 6.78 g of a dilute solution of the condensation catalyst was introduced. After stirring for 4 hours under reflux of toluene, the catalyst was neutralized by introducing 9.05 g of a dilute neutralization solution. After 20 minutes, the heating bath was removed and the mixture was allowed to cool. A cross-linkable base composition called CBR1 was obtained.

[0115] Extract 40.00g aliquote of the obtained basic composition CBR1, then still keep stirring and add 1.00g MD under cold conditions Vi Q(OH) resin (E), 0.63 g of 2,4-dichlorobenzoy...

Embodiment 2-6

[0117] Example 2-6: Preparation of pressure sensitive adhesive (PSA) composition according to the present invention

[0118] Follow the procedure of Example 1 but the basic composition CBR1, toluene, DCB peroxide and MD Vi The amount of Q(OH) resin (E) is shown in Table 1, expressed in g.

[0119] Table 1

[0120]

Embodiment 7

[0124] Example 7: Preparation of pressure sensitive adhesive (PSA) composition according to the present invention

[0125] 709.85 g of MQ(OH) resin (A) and 403.75 g of toluene were introduced into the reactor, and then stirring was started at a rate of 110 rpm.

[0126] Organic silica gel (B) (386.40 g) was added in a small amount under stirring within 1 hour. The temperature reached by self-heating is about 40-45°C. After the glue is completely dissolved, the base composition glue in the form of a homogeneous mixture is stored at ambient temperature. A crosslinkable base composition called CBR2 was obtained.

[0127] Then add 3.08g of MD to a 40.39g aliquot of the base composition CBR2 under stirring and under cold conditions Vi Q(OH) resin (E), 20.57g of peroxide DCB and 20.57g of toluene.

[0128] The obtained pressure-sensitive adhesive composition was packaged in a glass vial.

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Abstract

The invention relates to a silicone composition that includes: a hydroxylated silicone resin A of the MQ(OH) type; a hydroxylated silicone gum B; and a third component comprising a vinylated silicone resin E of the MQ or MQ(OH) type with DVi and / or MVi patterns. The invention also relates to a method for preparing the same, to a complex including a substrate at least partially covered with such a cross-linked silicone composition, and to the use of such a silicone composition for totally or partially coating a surface of a substrate in order to impart adhesive properties thereto.

Description

Technical field [0001] The present invention relates to a pressure-sensitive adhesive composition based on organosilicon, a preparation method and use thereof. Background technique [0002] Generally, the pressure-sensitive adhesive composition is represented by the abbreviation PSA of "pressure-sensitive adhesive" in English. In the case of the present invention, it is thus a "silicone PSA" composition. [0003] Pressure-sensitive adhesives are adhesives that can be adhered to a surface only by contact or under light pressure. There are many types of pressure sensitive adhesives, including certain silicone compositions. Silicone PSA has some advantages over other types of PSA. Silicone PSAs can be used in a wide temperature range, and they are compositions that are resistant to harsh physical or chemical conditions (resistance to moisture, solvents, acids, UV radiation). They are resistant to microbial attack. Silicone PSA has excellent dielectric properties. Moreover, they ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C09J183/04C08L83/07C09J183/07
CPCC08G77/70C08G77/80C08L83/04C08G77/16C09J183/04C08G77/20C08L83/00
Inventor M·费德尔J·怀特
Owner BLUESTAR SILICONES FRANCE SAS