Patent US4749766A successfully refreshed from Google Patents.
US4749766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organotin curing catalyst for vulcanizable organopolysiloxanes
Assignee: Rhone Poulenc Specialites Chimiques
•
Filing: 1987-01-09
•
Granted: 1988-06-07
•
Expires: 2007-01-09
Abstract
Abstract Novel organotin curing catalysts for, e.g., the RTV organopolysiloxanes, whether single- or two-component such compositions, are comprised of admixture of (i) a diorganotin bis( beta -diketonate) and (ii) an organotin (IV) compound devoid of beta -diketonato functional group. The silicone elastomers produced thereby are notably well adopted for use in the building industry.
Inventors
- 👤 Claude Millet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:50
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/56; C08K5/57; C08K5/0091; C08K5/58; Y; Y10; Y10S; Y10S528/00; Y10S528/901
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
110 words
An organopolysiloxane composition of matter, which comprises a vulcanizable organopolysiloxane base composition and an organotin curing catalyst therefor, said organotin curing catalyst comprising admixture of (i) a diorganotin bis(β-diketonate) and (ii) an organotin (IV) compound devoid of β-diketonate functional group and containing at least one tin atom, each such tin atom bearing two organic radicals bonded thereto via a Sn--C bond, with each of the two remaining valencies being satisfied by organic or inorganic radicals bonded thereto via a Sn--O or Sn--S bond, by halogen atoms, by hydroxyl groups or by oxygen atoms, said organotin curing catalyst being present in an amount effective to cure said vulcanizable organopolysiloxane base composition.
Claim 2
Dependent Claim
110 words
An organopolysiloxane composition of matter, which comprises a vulcanizable organopolysiloxane base composition and an organotin curing catalyst therefor, said organotin curing catalyst comprising admixture of (i) a diorganotin bis(β-diketonate) and (ii) an organotin (IV) compound devoid of β-diketonate functional group and containing at least one tin atom, each such tin atom bearing two organic radicals bonded thereto via a Sn--C bond, with each of the two remaining valencies being satisfied by organic or inorganic radicals bonded thereto via a Sn--O or Sn--S bond, by halogen atoms, by hydroxyl groups or by oxygen atoms, said organotin curing catalyst being present in an amount effective to cure said vulcanizable organopolysiloxane base composition.
Claim 3
Dependent Claim
42 words
The organopolysiloxane composition of matter as defined by claim 1, said organotin curing catalyst comprising from 0.1 to 99.9% by weight of the diorganotin bis(β-diketonate) and from 99.9% to 0.1% by weight of the organotin (IV) compound devoid of β-diketonato functional group.
Claim 4
Dependent Claim
135 words
The organopolysiloxane composition of matter as defined by claim 1, said diorganotin bis(β-diketonate) having the formula: ##STR50## in which R 1 and R 2 , which may be identical or different, are C 1 -C 12 organic radicals; R 3 and R 5 , which may be identical or different, have the definition of R 1 and R 2 or are hydrogen atoms, cyanoalkyl radicals containing a C 2 -C 4 alkyl moiety, or cyanoalkoxy radicals containing a C 1 -C 5 alkyl moiety; R 4 is a hydrogen atom or a halogenated or nonhalogenated C 1 -C 8 hydrocarbon radical, with the proviso that R 4 and R 5 may together form a cyclic C 5 -C 12 hydrocarbon radical, or a substituted such radical bearing at least one chloro, nitro or cyano substituent.
Claim 5
Dependent Claim
26 words
The organopolysiloxane composition of matter as defined by claim 3, wherein R 1 and R 2 are halogenated or nonhalogenated C 1 -C 12 alkyl radicals.
Claim 6
Dependent Claim
19 words
The organopolysiloxane composition of matter as defined in claim 4, said diorganotin bis(β-diketonate) having one of the formulae: ##STR51##
Claim 7
Dependent Claim
85 words
The organopolysiloxane composition of matter as defined by claim 1, said organotin (IV) compound devoid of β-diketonato functional group having one of the formulae: A.sub.2 SnR.sup.6.sub.2, R.sup.6.sub.2 SnO, AR.sup.6.sub.2 SnOSnR.sup.6.sub.2 A, or ##STR52## in which R.sup.6 is a halogenated or nonhalogenated C.sub.1 -C.sub.20 hydrocarbon radical; A is an organic or inorganic radical, an organosilicon radical or a polydiorganosiloxane chain, bonded to the tin atom via a Sn--O or Sn--S bond, a halogen atom or a hydroxyl radical; and Q is a C.sub.2 -C.sub.10 alkylene radical.
Claim 8
Dependent Claim
118 words
The organopolysiloxane composition of matter as defined by claim 6, said organotin (IV) compound devoid of β-diketonato functional group having one of the formulae: A.sub.2 SnR.sup.6.sub.2, or R.sup.6.sub.2 SnO in which R 6 is a straight or branched chain C 1 -C 20 alkyl radical, and A is a monocarboxylate radical of the formula R 7 COO, with R 7 being a C 1 -C 20 hydrocarbon radical; an alkoxy radical of the formula R 8 O, in which R 8 is a C 1 -C 8 hydrocarbon radical; a ketiminoxy radical of the formula: ##STR53## in which R 12 and R 13 are C 1 -C 10 hydrocarbon radicals; an organosilicon radical; or a short Chain polydiorganosiloxane.
Claim 9
Dependent Claim
37 words
The organopolysiloxane composition of matter as defined by claim 7, said organotin (IV) compound devoid of β-diketonato functional group comprising di-n-butyltin dilaurate, di-n-octyltin dilaurate, di-n-butyltin diacetate, di-n-octyltin diacetate, di-n-butyltin di-2-ethylhexanoate, di-n-octyltin di-2-ethylhexanoate, di-n-butyltin diversatate, or di-n-octyltin diversatate.
Claim 10
Dependent Claim
42 words
The organopolysiloxane composition of matter as defined by claim 2, said organotin curing catalyst comprising from 10 to 90% by weight of the diorganotin bis(β-diketonate) and from 90 to 10% by weight of the organotin (IV) compound devoid of β-diketonato functional group.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |