Dow Global Technolgoies LLC

Other

Gangwei Sun

Mohamed Esseghir

Chester J Kmiec

Xianmin Xu

Peng Gao

Yonghua Gong

Jeffrey M Cogen

Jeffrey Morris Cogen

Hongyu Chen

Gary Robert Marchand

Yabin Sun

Gary R Marchand

Lei Ying

Xian Min Xu

Bharat Indu Chaudhary

Yi Zhang

William J Harris

Yushan Hu

Cheng Chen

Dachao Li

David Hong Fei Guo

Jianxin Zhang

Jiawen Xiong

Youjun Wu

Zhe Du

Renhua Fan

Shuo-En Wang

Lingfeng Yu

Bharat I Chaudhary

David Hong Guo

Chemical foaming agents having p-toluenesulfonyl groups. Processes for preparing foamed polyolefin compositions using chemical foaming agents having p-toluenesulfonyl groups. Articles of manufacture containing formed polyolefins prepared using chemical foaming agents having p-toluenesulfonyl groups.

Chemical foaming agents containing tosyl groups

A filling composition comprises (A) a mineral oil having a kinematic viscosity from 80 cSt to 100 cSt at 40&#xb0; C.; (B) a styrene-ethylene/propylene diblock copolymer; and (C1) a propylene/ethylene copolymer having a weight average molecular weight (M) from 5,000 to 200,000 or (C2) an ethylene/propylene copolymer having a weight average molecular weight (M) from 5,000 to 200,000. The filling composition is used as a filling composition in a buffer tube.

Filling composition for optical fiber cables

The present disclosure provides a foamable composition containing (A) a high density polyethylene (HDPE); (B) a low density polyethylene (LDPE); (C) a peroxide-modified HDPE; and (D) a nucleator. The present disclosure also provides a process for making a foam composition. Additionally, the present disclosure provides a foam formed from a foamable composition, and a cable with an insulation layer containing the foam.

Process for foaming polyolefin compositions using a modified high density polyethylene

Provided is a flooding composition. The flooding composition includes in weight percent (wt %) based on the weight of the composition: (A) from 1 wt % to less than 5 wt % of a polytetrafluoroethylene (PTFE) powder; (B) a styrene-ethylene/propylene block copolymer; and (C) a mineral oil having a kinematic viscosity from 32 cSt to 100 cSt at 40&#xb0; C. Also a fiber optic cable is provided. The fiber optic cable includes a buffer tube; at least one optical fiber in the buffer tube; and the flooding composition.

Flooding composition with polytetrafluoroethyene

A polyolefin composition is foamed by a process in which a nucleator is used, and the nucleator comprises 80% or more of unagglomerated fluororesin particles and/or agglomerates of fluororesin particles in which both the unagglomerated particles and the agglomerates are less than 1 &#x3bc;m in size.

Process for foaming polyolefin compositions using a fluororesin as a nucleating agent

A process of foaming a polyolefin, e.g., polyethylene, composition using as a nucleator a combination of (A) azodicarbonamide, and (B) a mixture of (1) a first component consisting of at least one of citric acid and an alkali metal citrate, and (2) a second component consisting of at least one of an alkali metal citrate, a di-alkali metal hydrogen citrate, an alkali metal dihydrogen citrate and an alkali metal bicarbonate, with the proviso that the mixture is not solely composed of alkali metal citrate.

Process for foaming polyolefin compositions using an azodicarbonamide/citrate mixture as a nucleating agent

A composition comprises (A) a mineral oil having a viscosity from 32 cSt to 100 cSt at 40&#xb0; C.; (B) a styrene-ethylene/propylene diblock copolymer; and (C) from 1 wt % to less than 5 wt % polystyrene having a weight average molecular weight (M) from 1,000 to 100,000. The composition is used as a filling composition in a buffer tube.

A foamable composition comprises in weight percent based on the weight of the composition: (A) 45 to 95 wt % HDPE, (B) 4 to 54 wt % LDPE, and (C) 0.01 to 2 wt % of a nucleating agent comprising in weight percent based on the weight of the nucleating agent: (1) 20 to 80 wt % of fluororesin, e.g., PTFE, and (2) 80 to 20 wt % of expandable polymeric microspheres.

Nucleating agent for foamable cable insulation

The process of foaming a polyolefin composition using as a nucleator a combination of a fluororesin and a boron nitride at a fluororesin-to-boron nitride weight ratio of less than 4:1. The synergistic effect between these two nucleating agents results in a higher nuclei density and a foamed product with a smaller average cell size as compared to processes using and products produced by the use of neat PTFE or neat boron nitride alone as the nucleating agent.

Process for foaming polyolefin compositions using a fluororesin/boron nitride mixture as a nucleating agent

Buffer tubes made from a composition comprising: (A) polypropylene, (B) high density polyethylene (HDPE), (C) propylene-ethylene copolymer (PE copolymer), (D) olefin block composite, and (E) optionally, one or more of a nucleating agent, filler and additive, exhibit reduced stress whitening as compared to buffer tubes made from conventional polypropylene compositions.

Buffer tubes for fiber optic cables

Polymeric compositions comprising a polybutylene terephthalate, an ethylene-based polymer, and a maleated ethylene-based polymer. Optical cable components fabricated from the polymeric composition. Optionally, the polymeric composition can further comprise one or more additives, such as a filler. The optical fiber cable components can be selected from buffer tubes, core tubes, and slotted core tubes, among others.

Polymeric compositions for optical fiber cable components

The process of foaming a polyolefin, e.g., polyethylene, composition using as a nucleator a combination an azodicarbonamide (ADCA) and a fluororesin at a ADCA: fluororesin weight ratio of 60:40 to 20:80. The synergic effect between these two nucleating agents results in a higher nuclei density and a foamed product with a smaller cell size as compared to processes using and products produced by the use of neat PTFE or neat ADCA alone as the nucleating agent.

Process for foaming polyolefin compositions using a fluororesin/azodicarbonamide mixture as a nucleating agent

In one aspect there is provided a foam comprising: a polymeric matrix comprising polyethylene grafted polymerized siloxane, and a plurality of cells formed in the polymeric matrix and containing a blowing agent comprising carbon dioxide. In another aspect there is provided a method of making a foam comprising: grafting polymerized siloxane to polyethylene to form a grafted intermediate; molding the grafted intermediate to form a molded intermediate; and foaming the molded intermediate using high-pressure COto form the foam, wherein the foam has a porosity greater than 75%.

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Shanghai, China

Gangwei Sun