Self-lubricating, organic-silicone rubber material, its preparation, process and use

Abstract

The present invention provides a self-lubricating organic-silicone rubber material and its preparation process. The self-lubricating organic-silicone rubber material comprises organic-silicone rubber, self-lubricating additive, filler and vulcanizing agent, and optionally, release agent and pigment. The self-lubricating organic-silicone rubber material of the present invention can be used in various glass-cleaning appliances, especially the screen wiper of vehicles.

1 . A self-lubricating organic-silicone rubber material comprising:
 a. organic-silicone rubber;   b. self-lubricating additive;   c. filler;   d. vulcanizing agent; and   e. optionally, release agent and pigment.   
     
     
         2 . The material according to  claim 1 , wherein said self-lubricating additive is selected from the group consisting of graphite, fluorine-containing compounds, boron nitride, dimethicone oil, methyl hydrogen-containing silicone oil, ethyl silicone oil, vinyl silicone oil, stearates, and mixtures thereof. 
     
     
         3 . The material according to  claim 1 , wherein said self-lubricating additive is selected from the group consisting of fluorizated graphite, teflon powder, methyl hydrogen-containing silicone oil, vinyl silicone oil, zinc stearate, barium stearate, and mixtures thereof. 
     
     
         4 . The material according to  claim 1 , wherein said self-lubricating additive is MD-188A. 
     
     
         5 . The material according to  claims 1 , wherein said filler is selected from quartz powder, kaolin and mixtures thereof. 
     
     
         6 . The material according to  claim 1 , wherein said filler is kaolin. 
     
     
         7 . The material according to  claim 1 , wherein said vulcanizing agent is benzoyl peroxide. 
     
     
         8 . The material according to  claim 1 , wherein said organic-silicone rubber accounts for 10-70% by weight of the total weight of said self-lubricating organic-silicone rubber material. 
     
     
         9 . The material according to  claim 1 , wherein said self-lubricating additive accounts for 2-30% by weight of the total weight of said self-lubricating organic-silicone rubber material. 
     
     
         10 . The material according to  claim 1 , wherein said self-lubricating additive accounts for 3-20% by weight of the total weight of said self-lubricating organic-silicone rubber material. 
     
     
         11 . The material according to  claim 1 , wherein said filler accounts for 20-70% by weight of the total weight of said self-lubricating organic-silicone rubber material. 
     
     
         12 . A process for preparing a self-lubricating organic-silicone rubber material comprising the steps of:
 a. mixing (1) an organic-silicone rubber, (2) a self-lubricating additive and (3) a filler,   b. adding a vulcanizing agent thereby forming a mixture, and   c. optionally adding a release agent and a pigment to the mixture.   
     
     
         13 . The process according to  claim 12 , further comprising the following steps of:
 a. adding the organic-silicone rubber, the self-lubricating additive and the filler to a internal mixer;   b. mixing therein thereby forming a first mixture;   c. letting the first mixture stand still for 1-24 hours;   d. adding the first mixture to an open mixer, to which the vulcanizing agent, release agent and pigment are added, thereby forming a second mixture; and   e. letting the second mixture stand still for 12 or more than 12 hours.   
     
     
         14 . A screen wiper made from a self-lubricating organic-silicone rubber material comprising:
 a. organic-silicone rubber;   b. self-lubricating additive;   c. filler;   d. vulcanizing agent; and   e. optionally, release agent and pigment.   
     
     
         15 . The screen wiper according to  claim 14 , wherein said self-lubricating additive is selected from the group consisting of graphite, fluorine-containing compounds, boron nitride, dimethicone oil, methyl hydrogen-containing silicone oil, ethyl silicone oil, vinyl silicone oil, stearates, and mixtures thereof. 
     
     
         16 . The screen wiper according to  claim 14 , wherein said self-lubricating additive is selected from the group consisting of fluorizated graphite, teflon powder, methyl hydrogen-containing silicone oil, vinyl silicone oil, zinc stearate, barium stearate, and mixtures thereof. 
     
     
         17 . The screen wiper according to  claim 14 , wherein said self-lubricating additive is MD-188A. 
     
     
         18 . The screen wiper according to  claims 14 , wherein said filler is selected from quartz powder, kaolin and mixtures thereof. 
     
     
         19 . The screen wiper according to  claim 14 , wherein said filler is kaolin. 
     
     
         20 . The screen wiper according to  claim 14 , wherein said vulcanizing agent is benzoyl peroxide. 
     
     
         21 . The screen wiper according to  claim 14 , wherein said organic-silicone rubber accounts for 10-70% by weight of the total weight of said self-lubricating organic-silicone rubber material. 
     
     
         22 . The screen wiper according to  claim 14 , wherein said self-lubricating additive accounts for 2-30% by weight of the total weight of said self-lubricating organic-silicone rubber material. 
     
     
         23 . The screen wiper according to  claim 14 , wherein said self-lubricating additive accounts for 3-20% by weight of the total weight of said self-lubricating organic-silicone rubber material. 
     
     
         24 . The screen wiper according to  claim 14 , wherein said filler accounts for 20-70% by weight of the total weight of said self-lubricating organic-silicone rubber material.