US4965338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
PBT with improved tracking resistance
Assignee: SABIC Global Technologies BV
•
Filing: 1989-08-09
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Granted: 1990-10-23
•
Expires: 2009-08-09
Abstract
Abstract The properties of polyesters, in particular the tracking index and the antistatic properties, can be improved by the addition of a salt of an alkane sulphonic acid.
Inventors
- 👤 Farshid M. H. Tabankia
- 👤 Jan De Boer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:15
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/16; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
67 words
Use of an alkane sulphonate salt, with more than eight carbon atoms in the alkane group, in polymer mixtures comprising a polyester having units derived from an alkanediol and an aromatic dicarboxylic acid, characterized in that the alkane sulphonate salt is used in a quantity of 1-10 parts by weight per 100 parts by weight of the polyester to improve the tracking index of the polymer mixture.
Claim 2
Dependent Claim
67 words
Use of an alkane sulphonate salt, with more than eight carbon atoms in the alkane group, in polymer mixtures comprising a polyester having units derived from an alkanediol and an aromatic dicarboxylic acid, characterized in that the alkane sulphonate salt is used in a quantity of 1-10 parts by weight per 100 parts by weight of the polyester to improve the tracking index of the polymer mixture.
Claim 3
Dependent Claim
21 words
Use according to claim 1, wherein the polyester has more than 70 mol of units derived from terephthalic acid and butane-1,4-diol.
Claim 4
Dependent Claim
18 words
Use according to claim 1, in a polymer mixture which comprises besides the polyester an aromatic polycarbonate also.
Claim 5
Dependent Claim
24 words
Use according to claim 3, wherein the polymer mixture comprises 5-100 parts by weight of aromatic polycarbonate per 100 parts by weight of polyester.
Claim 6
Dependent Claim
14 words
Use according to claim 1 wherein the polymer mixture further comprises conventionally used additives.
Claim 7
Dependent Claim
33 words
Use according to claim 1 wherein the sodium salt of a mixture of alkane sulphonic acids, with the alkane groups comprising from 12 to 20 carbon atoms, is used as alkane sulphonate salt.
Claim 8
Independent Claim
40 words
A method of improving the comparative tracking index of a polyester derived from an alkane diol and an aromatic dicarboxylic acid consisting essentially of adding to the polyester a comparative tracking index improving effective amount of an alkane sulphonate salt.
Claim 9
Independent Claim
40 words
A method of improving the comparative tracking index of a polyester derived from an alkane diol and an aromatic dicarboxylic acid consisting essentially of adding to the polyester a comparative tracking index improving effective amount of an alkane sulphonate salt.
Claim 10
Dependent Claim
11 words
The method of claim 7 wherein the polyester is polybutylene terephthalate.
Claim 11
Dependent Claim
31 words
The method of claim 7 wherein the alkane sulphonate salt is the salt of a mixture of alkane sulphonic acids having about 12 to 20 carbon atoms in the alkane group.
Claim 12
Dependent Claim
25 words
The method of claim 9 wherein the salt is selected from the group consisting of the sodium salt, the calcium salt and the lithium salt.
Claim 13
Dependent Claim
29 words
The method of claim 7 wherein the effective amount of alkane sulphonate salt is about 1 to 10 parts by weight per 100 parts by weight of the polyester.
Claim 14
Dependent Claim
23 words
The method of claim 7 wherein the polyester comprises more than 70 mol % of units derived from terephthalic acid and butane-1, 4-diol.
Claim 15
Dependent Claim
25 words
The method of claim 7 further consisting essentially of adding an aromatic polycarbonate to the polyester to form a mixture of polyester and aromatic polycarbonate.
Claim 16
Dependent Claim
26 words
The method of claim 12 wherein the mixture comprises about 5 to 100 parts by weight of aromatic polycarbonate per 100 parts by weight of polyester.
Claim 17
Dependent Claim
34 words
The method of claim 7 further consisting essentially of at least one additive selected from the group consisting of flame-retarding agents, an agent to improve impact strength, fillers, reinforcing fibers, stabilisers, pigments and dyes.
Claim 18
Independent Claim
46 words
A method of improving the comparative tracking index of a polyester derived from an alkane diol and an aromatic dicarboxylic acid consisting essentially of adding to the polyester about 1 to 10 parts by weight alkane sulphonate salt per 100 parts by weight of the polyester.
Claim 19
Independent Claim
46 words
A method of improving the comparative tracking index of a polyester derived from an alkane diol and an aromatic dicarboxylic acid consisting essentially of adding to the polyester about 1 to 10 parts by weight alkane sulphonate salt per 100 parts by weight of the polyester.
Claim 20
Dependent Claim
11 words
The method of claim 16 wherein the polyester is polybutylene terephthalate.
Claim 21
Dependent Claim
31 words
The method of claim 16 wherein the alkane sulphonate salt is the salt of a mixture of alkane sulphonic acids having about 12 to 20 carbon atoms in the alkane group.
Claim 22
Dependent Claim
25 words
The method of claim 18 wherein the salt is selected from the group consisting of the sodium salt, the calcium salt and the lithium salt.
Claim 23
Dependent Claim
30 words
The method of claim 16 further consisting essentially of adding to the polyester about 5 to 100 parts by weight of aromatic polycarbonate per 100 parts by weight of polyester.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |