Apr. 30, 2015  4  US 2015/0119536 Al  [0051]  The addition of silicone resin to the silicone-acrylic  copolymer is considered as a "bodying reacting" and is con› ducted in the presence of a bodying catalyst. Examples of the  bodying catalyst for this bodying reaction is (NH$_{4}$ ) $_{2}$CO$_{3}$(s),  ammonium carbamate, NH$_{4}$OH(aq), methanesulfonic acid,  sulfuric acid, acidic clay, acidic Amberlyst™ ion exchange  resins (Rohm and Haas), KOH, NaOH, LiOH, n-BuLi, and  mixtures thereof. While the bodying reactions may take place  at room temperature, one preferred method is to conduct the  reaction with heating at 50-160°  C. The preferable tempera› ture of the bodying step is between 40-150°  C.  [0052]  The bodying reaction is preferably allowed to pro› ceed at least until the rate of evolution of condensation  byproducts, such as water, alcohol, and carbodioxide, is sub› stantially removed. Heating can be continued until the desired  physical properties such as viscosity, clarity of the solution,  and adhesion values are obtained. Typically the mixture of  each step will be allowed to react from about 1 to about 24  hours. When the bodying step of reaction is complete, the  solids content of the resulting composition can be adjusted by  adding or removing solvent.  [0053]  Suitable tackifying agents are those known in the art  including: (1) aliphatic hydrocarbons; (2) mixed aliphatic and  aromatic hydrocarbons; (3) aromatic hydrocarbons; (4) sub› stituted aromatic hydrocarbons; (5) hydrogenated esters; (6)  polyterpenes; (7) mineral oils; and (8) wood resins or rosins  and hydrogenated forms thereof. Useful levels of tackifiers  are generally from about 1 wt% to about 30 wt% based on the  weight of the total composition.  [0054]  The copolymers of the invention may also be  blended with additional polymers to enhance desired proper› ties. Examples of polymers useful for blending include, but  are not limited to, other acrylates, polysiloxanes, polyisobu› tylene, polyester, PPO, polyisoprene, polybutadiene, styrenic  block polymers, and the like. Examples of styrenic block  copolymers include, but are not limited to, styrene-isoprene› styrene block copolymer (SIS), styrene-butadiene-styrene  copolymer (SBS), styrene-ethylenebutene-styrene copoly› mers (SEBS), and diblock analogs thereof.  [0055]  The compositions of the invention may include  other additives known to those skilled in the art. These addi› tives may include, but are not limited to, pigments, fillers,  fluorescent additives, flow and leveling additives, wetting  agents, surfactants, antifoaming agents, rheology modifiers,  permeation enhancers, stabilizers, and antioxidants.  [0056]  Antioxidants may be added singly or in combination  to protect the components against degradation during prepa› ration and use of the adhesive compositions, and to ensure  long-term thermal stability. In general up to about 1 % by  weight of one or more antioxidants may be included in the  adhesive compositions, usually, from about 0.1 % to about  0.5% by weight.  [0057]  Additional polymers may be further blended with  the silicone-acrylic copolymers. Examples of such polymer  include polyester, polyether, polyurethane, natural rubber,  synthetic rubber, and the like.  [0058]  An initial charge containing 20.0 g of butyl acrylate,  5.0 g of methyl methacrylate, 0.5 g oftrimethoxysilylpropy› lacrylate, 40.8 g of silicone polymer (Wacker Elastomer  SON), 0.05 g of Vazo-67 (2,2’-azodi(2-methylbutyronitrile) ),  and 50.0 g of xylene was mixed and charged to a 500-mL  4-neck round bottom flask equipped with stainless steel stir› rer, thermometer, condenser, water bath, and slow addition  funnels. The initial charge was heated to reflux while stirring.  After 15 minutes of reflux, 30 g of xylene and 0.3 g ofVazo-67  was added over a period of2 hours. At the end of the addition,  0.1 gofKOH (LON in water)was added and the mixture was  stirred at reflux for 4 hour. At the end of the hold period, the  contents were cooled to room temperature and the polymer  solution was discharged. Xylene was removed by rotorary  evaporation under vacuum and heptane was added to reach a  solid content of 50%.  [0059]  An initial charge containing 98.0 g of 2-EHA, 2.0 g  oftrimethoxysilylpropylacrylate, 400.0 g of silicone polymer  (Wacker Elastomer SON), 0.07 g ofvazo-67, and 650.0 g of  heptane was mixed and charged to a 2-L 4-neck round bottom  flask equipped with stainless steel stirrer, thermometer, con› denser, water bath, and slow addition funnels. The initial  charge was heated to reflux while stirring. After 15 minutes of  reflux, 50 g of heptane and 0.5 g ofVazo-67 were added over  a period of 2 hours. At the end of the addition, 0.2 g of KOH  (1.0 N in water) was added and the mixture was stirred at  reflux for 4 hour. At the end of the hold period, the content was  cooled to room temperature and the polymer solution was  discharged. Part of the heptane was removed by rotorary  evaporation under vacuum, adjusting the solids content to  50%.  [0060]  An initial charge containing 20.0 g of 2-EHA, 5.0 g  of methyl acrylate, 0.5 g of trimethoxysilylpropylacrylate,  0.05 g of vazo-67, and 50.0 g of xylene was mixed and  charged to a 500-mL 4-neck round bottom flask equipped  with stainless steel stirrer, thermometer, condenser, water  bath, and slow addition funnels. The initial charge was heated  to reflux while stirring. After 15 minutes of reflux, 30 g of  xylene and 0.3 g of Vazo-67 was added over a period of 2  hours. At the end of the addition, 0.1 g of KOH (IN in water),  and 40.8 g of silicone polymer (Wacker Elastomer SON) were  added and the mixture was stirred at reflux for 4 hour. At the  end of the hold period, the contents were cooled to room  temperature and the polymer solution was discharged.  Xylene was removed by rotorary evaporation under vacuum  and heptane was added, adjusting the solids content to 50%.  [0061]  An initial charge containing 98.0 g of2-EHA, 2.0 g  oftrimethoxysilylpropylacrylate, 0.07 g ofvazo-67, and 1.0 L  of heptane were mixed and charged to a 2-L 4-neck round  bottom flask equipped with stainless steel stirrer, thermom› eter, condenser, water bath, and slow addition funnels. The  initial charge was heated to reflux while stirring. After 15  minutes of reflux, 50 g of heptane and 0.5 g ofVazo-67 were  added over a period of2 hours. At the end of the addition, 0.2  g of KOH (1.0 N in water) and 400.0 g of silicone polymer  (Wacker Elastomer SON) were added and the mixture was  stirred at reflux for 4 hour. At the end of the hold period, the  content was cooled to room temperature and the polymer  solution was discharged. Some heptane was removed by  rotorary evaporation under vacuum, adjusting the solids con› tent to 50%.  Example 4  EXAMPLES  Example 1  Example 2  Example 3 