# US 5,708,089 A · Mixtures of fluoropolymers and oxidized polyarylene sulfides

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- Number: US 5,708,089 A
- Document ID: US5708089A
- Status: Granted
- Kind: A
- Application number: 08/605,400
- Filed: 1996-03-22
- Granted: 1998-01-13
- Earliest claimed: 1993-07-10
- Assignees: Hoecht Aktiengesellschaft
- Inventors: Helmut Scheckenbach; Andreas Schleicher; Jurgen Kulpe; Bernd Jansen
- Web page: https://patentgrep.com/patent/US5708089A

## CPC

- C08L 27/12: containing fluorine atoms
- C08L 81/06: Polysulfones; Polyethersulfones
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

Mixtures of fluoropolymers and oxidized polyarylene sulfides A polymer mixture of A) at least one fluoropolymer in a proportion of from 50 to 99% by weight and B) at least one polyarylene sulfone or polyarylene compound containing at least two of the bridges --S--, --SO-- and --SO.sub.2 -- or a mixture of the two in a proportion of from 1 to 50% by weight, where the sum of components A) and B) is always 100% by weight. This mixture is used for the production of sliding bearings or gasket materials having a reduced tendency to creep and reduced abrasion.

## Claims

### Claim 1

A polymer mixture which consists essentially of
A) at least one fluoropolymer in a proportion of from 50 to 99% by weight and
B) at least one polyarylene sulfone or polyarylene compound containing at least one of the bridges --SO-- or --SO.sub.2 -- or a mixture of the two in a proportion of from 1 to 50% by weight,
where the sum of components A) and B) is always 100% by weight, and said polymer mixture has a sulfone content of at least 65%.

### Claim 2 (depends on 1)

A polymer mixture as claimed in claim 1, wherein the proportion of component A) is from 60 to 98% by weight and the proportion of component B) is from 2 to 40% by weight.

### Claim 3 (depends on 1)

A polymer mixture as claimed in claim 1, wherein component A) contains one of the recurring units of the formulae (I) to (VIII): ##STR7##
--(CF.sub.2 --CF.sub.2).sub.m --(CH.sub.2 --CH.sub.2).sub.n -(II)
--(CF.sub.2 --CF(CF.sub.3)).sub.m --(CF.sub.2 --CF.sub.2).sub.n -(III)
--(CF.sub.2 --C(CI)F).sub.m --(CH.sub.2 --CH.sub.2).sub.n -(IV)
--CF.sub.2 --C(CI)F- (V)
--CH.sub.2 --CF.sub.2 - (VI)
--CH.sub.2 --CHF- (VII)
-CF.sub.2 -CF.sub.2 - (VIII)
where, in the formula (I), X is O-R, where R is a perfluorinated C.sub.1 -C.sub.8 -alkyl radical, and, in the formulae (I) to (IV), m and n are each numbers from 0.01 to 1, where the sum of m and n is 1.

### Claim 4 (depends on 1)

A polymer mixture as claimed in claim 1, wherein component B) is a linear or branched polyarylene system (Mw:4000-200,000) containing the recurring unit of the formula (IX)
--›(Ar.sup.1).sub.d -X!.sub.e --›(Ar.sup.2).sub.i --Y!.sub.j --›(Ar.sup.3).sub.k -Z!.sub.i --›( Ar.sup.4).sub.o -W!.sub.p -(IX)
which contains at least one S and/or SO and/or SO.sub.2 group as bridge, where each Ar.sup.1, Ar.sup.2, Ar.sup.3, Ar.sup.4, W, X, Y and Z, independently of the others, is identical to or different from the others, the indices d, e, i, j, k , l, o and p, independently of one another, are zero or integers 1, 2, 3 or 4, where their sum must be at least 2, Ar.sup.1, Ar.sup.2, Ar.sup.3 and Ar.sup.4 in the formula (IX) are simple or directly para-, meta- or ortho-linked arylene systems having 6 to 18 carbon atoms, W, X, Y and Z are linking groups selected from --SO.sub.2 --, --S--, --SO--, --CO--, --CO.sub.2 --, alkylene or alkylidene groups, each having 1-6 carbon atoms, and NR.sup.1 groups, where R.sup.1 is an alkyl or alkylidene group having 1-6 carbon atoms, with the proviso that polymers from the class consisting of polyether sulfones are excluded.

### Claim 5 (depends on 1)

A polymer mixture as claimed in claim 1, wherein component B) is a polyarylene containing recurring units of the formula (X):
›-(S-E-).sub.a -(--SO-E).sub.b --(SO.sub.2 -E).sub.c -! (X)
in which each E, independently of the others, is phenylene, naphthylene or biphenylene, b and c, independently of one another, have values of from 0 to 1, and a has values of from 0 to less than 1, with the proviso that the sum a+b+c is 1 and at least two of the indices are greater than zero.

### Claim 6 (depends on 1)

A polymer mixture as claimed in claim 1, wherein component B) is a polymer containing recurring units of the formulae (XI)-(XIII) ##STR8##

### Claim 7 (depends on 5)

A polymer mixture as claimed in claim 5, wherein component B) is an oxidized polyphenylene sulfide containing recurring units of the formula (XIV) ##STR9## where the sulfone content is at least 65%.

### Claim 8 (depends on 1)

A polymer mixture as claimed in claim 1, wherein said component B) has a particle size from 3.multidot.10.sup.-6 to 300.multidot.10.sup.-6 m.

### Claim 9 (depends on 1)

A polymer mixture as claimed in claim 1, additionally contains heat stabilizers, UV stabilizers, antistatics, flameproofing agents, dyes, pigments and inorganic or organic fillers.

### Claim 10 (depends on 1)

A molding made from a polymer mixture as claimed in claim 1.

### Claim 11 (depends on 10)

A molding as claimed in claim 10 in the form of a sliding bearing or gasket material.

### Claim 12 (depends on 1)

A polymer mixture as claimed in claim 1, wherein component B) further comprises at least one bridge of --S--.

### Claim 13 (depends on 1)

The polymer mixture as claimed in claim 1, wherein said component B) contains at least one --SO-- bridge.

### Claim 14 (depends on 1)

The polymer mixture as claimed in claim 1, wherein component A) is present in an amount from 70 to 97% by weight and component B) is present in an amount from 3 to 30% by weight.

### Claim 15 (depends on 1)

The polymer mixture as claimed in claim 1, wherein polyethersulfones are excluded.

### Claim 16

A copolymer mixture which consists of
A) at least one fluoropolymer in a proportion of from 50 to 99% by weight and
B) at least one polyarylene sulfone or polyarylene compound containing at least two different bridges selected from the group consisting of --S--, --SO-- and --SO.sub.2 -- in a proportion of from 1 to 50% by weight
where the sum of components A) and B) is always 100% by weight.

### Claim 17 (depends on 16)

The copolymer as claimed in claim 16, wherein said component B) contains at least one --SO-- bridge.

### Claim 18 (depends on 16)

The copolymer as claimed in claim 16, wherein component A) is present in an amount from 70 to 97% by weight and component B) is present in an amount from 3 to 30% by weight.

### Claim 19

A polymer mixture which consists essentially of
A) at least one fluoropolymer in a proportion of from 70 to 99% by weight and
B) at least one polyarylene sulfone or polyarylene compound containing at least one of the bridges --SO-- or --SO.sub.2 -- or a mixture of the two in a proportion of from 1 to 30% by weight,
where the sum of components A) and B) is always 100% by weight and said polymer mixture has a sulfone content of at least 65%.

### Claim 20 (depends on 19)

The polymer mixture as claimed in claim 19, wherein said component B) contains at least one --SO-- bridge.

### Claim 21 (depends on 19)

The polymer mixture as claimed in claim 19, wherein component B) further comprises at least one bridge of --S--.