Unlock instant, AI-driven research and patent intelligence for your innovation.

Peroxide curable fluorelastomer compositions

A peroxide curing, fluoroelastomer technology, applied in the manufacture and use of fluoropolymers, elastic fluoropolymers, can solve the problem of high overall ion content

Inactive Publication Date: 2004-12-08
3M INNOVATIVE PROPERTIES CO
View PDF25 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no published information on how these materials were purified; however, due to the fact that acid acceptors are required for this process, the overall ion content appears to be undesirably high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Peroxide curable fluorelastomer compositions
  • Peroxide curable fluorelastomer compositions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0098] These examples illustrate the purity of peroxide cured samples of different compositions of elastomer and the use of partially crystalline fluoropolymer fillers. The material was purified according to anion and cation exchange methods as described above. Freeze coagulation to recover the resin. Table 1 indicates the formulations and curing properties used for curing with and without organic onium compounds. Table 2 lists some extraction data for the cured material and shows examples of low levels of extractables.

Embodiment 1

[0100] 31% VF 2 , terpolymer of 37% HFP and 31% TFE, 1% trifluoroethylene bromide (BTFE), Mooney viscosity ML 1+10 / 121°C=70.

Embodiment 2

[0102] A mixture of 80% terpolymer of Example 1 and 20% PFA binary copolymer (96% TFE, 4% PPVE), MFI 372°C, 5kg=2.2g / 10min.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
radiusaaaaaaaaaa
Login to View More

Abstract

Curable fluoroelastomer compositions having improved compression set after curing are provided, as well as compositions that are of relatively high purity. These compositions include a hydrogen-containing fluoroelastomer having interpolymerized units derived from a cure-site monomer, a curative (optionally with a co-agent), and an organo-onium. When the fluoroelastomer contains units derived from vinylidene fluoride, the composition is essentially free from an inorganic acid acceptor. Methods of improving the compression of cured fluoroelastomer and cured fluoroelastomers having improved compression set are also provided.

Description

field of invention [0001] The present invention relates to fluoropolymers, particularly elastomeric fluoropolymers (ie, fluoroelastomers), compositions containing fluoropolymers, products using fluoropolymers, and methods of making and using fluoropolymers. Background of the invention [0002] Many applications require cured fluoropolymer-containing compositions. For example, they can be used as gaskets and O-rings. Products of this shape are particularly required to have good compression set (ie the shaped product deforms little or no deformation after pressurization and decompression). [0003] High-purity fluoropolymers are also used in many industries. They are especially suitable for use in the electronics, semiconductor, optics, medical and pharmaceutical industries, to name a few. These polymers have relatively low levels of water-extractable metals and metal compounds. [0004] Mineral acid acceptors are typically incorporated into fluoroelastomers using peroxide...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/00C08F6/16C08F6/22C08F14/18C08K5/14C08K5/17C08K5/36C08K5/49C08L27/12C08L27/18C09D127/18
CPCC08L27/12C08F6/22C08K5/14C09D127/18C08L27/18C08F14/18C08L2205/02C08K5/00C08K5/17C08K5/36C08K5/49C08K5/50C09K3/1009C08L2666/04C08F2/16
Inventor W·W·A·格罗托尔特W·D·柯基奥K·欣策R·E·柯尔布G·洛尔
Owner 3M INNOVATIVE PROPERTIES CO