US 12,448,502 B2
Rubber composition, processing method thereof, sealing element using the same
Tao Xu, Hangzhou (CN); Zhi Sheng Fu, Hangzhou (CN); and An Yang Wu, Hangzhou (CN)
Assigned to HANGZHOU XINGLU TECHNOLOGIES CO., LTD, HANGZHOU (CN); and SHAOXING PINGHE NEW MATERIAL TECHNOLOGY CO., LTD., Shaoxing (CN)
Appl. No. 16/477,599
Filed by HANGZHOU XINGLU TECHNOLOGY CO., LTD., Zhejinag (CN); and SHAOXING PINGHE NEW MATERIAL TECHNOLOGY CO., LTD., Zhejiang (CN)
PCT Filed Jan. 12, 2018, PCT No. PCT/CN2018/072346
§ 371(c)(1), (2) Date Jul. 12, 2019,
PCT Pub. No. WO2018/130186, PCT Pub. Date Jul. 19, 2018.
Claims priority of application No. 201710024695.0 (CN), filed on Jan. 13, 2017; and application No. 201810020846.X (CN), filed on Jan. 10, 2018.
Prior Publication US 2019/0338110 A1, Nov. 7, 2019
This patent is subject to a terminal disclaimer.
Int. Cl. C08L 23/06 (2006.01); B29D 99/00 (2010.01); B60S 1/04 (2006.01); C08K 3/011 (2018.01); C08K 3/013 (2018.01); C08K 3/04 (2006.01); C08K 3/22 (2006.01); C08K 3/26 (2006.01); C08K 3/34 (2006.01); C08K 5/00 (2006.01); C08K 5/14 (2006.01); C08K 5/3492 (2006.01); C08L 23/08 (2025.01); C08L 23/16 (2006.01)
CPC C08L 23/06 (2013.01) [B29D 99/0053 (2013.01); B60S 1/04 (2013.01); C08K 3/011 (2018.01); C08K 3/013 (2018.01); C08K 3/04 (2013.01); C08K 3/346 (2013.01); C08K 5/0016 (2013.01); C08K 5/0025 (2013.01); C08K 5/005 (2013.01); C08K 5/14 (2013.01); C08K 5/34924 (2013.01); C08L 23/08 (2013.01); C08L 23/16 (2013.01); C08K 2003/2206 (2013.01); C08K 2003/2217 (2013.01); C08K 2003/2296 (2013.01); C08K 2003/265 (2013.01)] 14 Claims
 
1. A rubber composition, comprising a rubber matrix and certain essential components, wherein, said rubber matrix comprises, in parts by weight,
a branched polyethylene with a content represented as A, 10≤A≤100 parts, and
an EPM and an EPDM, with a total content represented as B, 0≤B<100 parts;
wherein A+B is equal to 100 total parts;
wherein, with respect to 100 parts by weight of the total amount of said rubber matrix, said certain essential components comprise 2˜20 parts of a cross-linking system, 60˜300 parts of a reinforcing filler, 20˜170 parts of a plasticizer and 3-25 parts of a metal oxide;
wherein, said branched polyethylene comprises an ethylene homopolymer having a branching degree of from 50 to 60 branches/1000 carbon atoms, a weight-average molecular weight of from 250,000 to 400,000, and a mooney viscosity ML (1+4) 125° C. which is not less than 2; said cross-linking system comprises a cross-linking agent and an assistant cross-linking agent; and
wherein the branched polyethylene is an elastomer.