US4111920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyether urethanes as antistatic additives in polyamide compositions
Assignee: Bayer AG
•
Filing: 1976-04-27
•
Granted: 1978-09-05
•
Expires: 1996-04-27
Abstract
Abstract The present invention relates to new polyether urethanes corresponding to the general formula ##STR1## and to a process for their production. The polyether urethanes are stable for prolonged periods at temperatures of up to approximately 300° C in aliphatic polyamide melts, and polyamides containing urethanes of this kind, more especially filaments and fibers of such polyamides or woven fabrics, knitted fabrics, nonwovens or pile fabrics produced from these filaments or fibers, show excellent antistatic properties.
Inventors
- 👤 Hans Egon Kunzel
- 👤 Francis Bentz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:16
CPC Classifications
C; C08; C08G; C08G71/00; C08G71/04; C08L; C08L77/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
136 words
Antistatic composition consisting essentially of an aliphatic polycarbonamide and, as an antistatic additive, from 0.5 to 15% by weight of the whole composition of a polyalkylene glycol ether with secondary urethane groups corresponding to the general formula: ##STR11## in which R' and R" independently of one another represent a member selected from the group consisting of a straight chain, cyclic or branched, saturated or unsaturated aliphatic hydrocarbon radical, an aralkyl radical and an alkyl-substituted aromatic radical, at least one of the two radicals R' and R" is an alkyl radical with from 10 to 30 carbon atoms, R'" represents a member selected from the group consisting of hydrogen atom, an alkyl group with from 1 to 5 carbon atoms, a cycloalkyl, an arylalkyl and an aralkyl group, and n is a number of 3 to 45.
Claim 2
Dependent Claim
136 words
Antistatic composition consisting essentially of an aliphatic polycarbonamide and, as an antistatic additive, from 0.5 to 15% by weight of the whole composition of a polyalkylene glycol ether with secondary urethane groups corresponding to the general formula: ##STR11## in which R' and R" independently of one another represent a member selected from the group consisting of a straight chain, cyclic or branched, saturated or unsaturated aliphatic hydrocarbon radical, an aralkyl radical and an alkyl-substituted aromatic radical, at least one of the two radicals R' and R" is an alkyl radical with from 10 to 30 carbon atoms, R'" represents a member selected from the group consisting of hydrogen atom, an alkyl group with from 1 to 5 carbon atoms, a cycloalkyl, an arylalkyl and an aralkyl group, and n is a number of 3 to 45.
Claim 3
Dependent Claim
45 words
Antistatic polyamide composition as claimed in claim 1 wherein the antistatic additive has the formula: ##STR12## in which one of the two radicals R' and R" is a methyl, ethyl, propyl or butyl radical, whilst the other radical is a stearyl, cetyl or myristyl radical.
Claim 4
Dependent Claim
30 words
Antistatic polyamide composition as claimed in claim 1, wherein the antistatic additive has the formula: ##STR13## in which both radicals R' and R" represent a stearyl, cetyl or myristyl radical.
Claim 5
Dependent Claim
26 words
Antistatic polyamide composition as claimed in claim 1 wherein the antistatic additive has the formula: ##STR14## in which n is a number of 4 to 45.
Claim 6
Dependent Claim
6 words
A fiber composition of claim 1.
References Cited (Backward Citations)
US3428710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |