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1. WO2006106362 - COMPOSITIONS D'ORGANOSILOXANE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1. a method of making a diluted polysiloxane containing polymer comprising the steps of:- i) Preparing a polysiloxane containing polymer by the polycondensation of siloxane containing monomers and/or oligomers which comprise condensable groups in the presence of an organopolysiloxane and/or an organic based diluent material, a
suitable catalyst and optionally an end-blocking agent; and
ii) Where required quenching the polymerisation process;
wherein the diluent material is substantially retained within the resulting diluted organopolysiloxane.

2. A method in accordance with claim 1 wherein the polymerisation product has the general formula
X3-A-X1
where X and X1 are independently selected from siloxane groups which terminate in hydroxyl or hydrolysable groups and A is a siloxane containing polymeric chain.
Examples of hydroxyl-terminating or hydrolysable groups X3 or X1 include -SiOH3,

-(FT)SiOH2, -(Ra)2Si0H, -RaSi(ORb)2, -Si(ORb)3, -Ra2SiORb or
-Ra2 Si -Rc- SiRdp(ORb)3.p where each Ra independently represents a monovalent hydrocarbyl group, for example, an alkyl group, in particular having from 1 to 8 carbon atoms, (and is preferably methyl); each Rb and Rd group is independently an alkyl or alkoxy group in which the alkyl groups suitably have up to 6 carbon atoms; Rc is a divalent hydrocarbon group which may be interrupted by one or more
siloxane spacers having up to six silicon atoms; and p has the value 0, 1 or 2.

3. A method in accordance with claim 1 or 2 wherein the polymerisation process is a polycondensation polymerisation process in which a linear and/or branched
organopolysiloxane having hydrolysable terminal groups is polymerised in the
presence of a condensation catalyst selected from

(i) a catalyst of the general formula R20SO 3H in which R20 represents an alkyl group, an aryl or an alkaryl group;
(ii) a phosphonitrile halide catalyst; and (iii) phosphonitrile halide ion based catalysts
(iv) a titanate and/or zirconate
(v) protic acids,
(vi) Lewis acids,
(vii) organic and inorganic bases.
(viii) Borates; and
(ix) Boranes, including carboranes

4. A method in accordance with claim 3 wherein the catalyst is
dodecylbenzenesulphonic acid which is quenched by a mono/di and trialkanolamine or an aluminasilicate zeolite.

5. A method in accordance with any preceding claim wherein the/or each diluent is an extender or plasticiser.

6. A method in accordance with any preceding claim wherein the diluent is selected from one or more of the group
trialkylsilyl terminated polydimethyl siloxane
polyisobutylenes (PIB),
phosphate esters polyalkylbenzenes,
linear and/or branched alkylbenzenes esters of aliphatic monocarboxylic acids.

7. A method in accordance with any one of claims 1 to 5 wherein the diluent is
selected from one or more of the group comprising
linear or branched mono unsaturated hydrocarbons such as linear or branched alkenes or mixtures thereof containing from 12 to 25 carbon atoms; and/or
mineral oil fractions comprising linear (n-paraffinic) mineral oils, branched (iso- paraffinic) mineral oils and/or cyclic (naphthenic) mineral oils and mixtures thereof.

8. A method in accordance with any preceding claim wherein the diluent is at least substantially miscible with monomer/oligomer and the polymer.

9. A diluted organopolysiloxane polymer obtainable by the method in accordance with any preceding claim.

10. A diluted organopolysiloxane polymer in accordance with claim 9 wherein the
polymer has the general formula
X3-A-X1
where X3 and X1 are independently selected from silyl groups which terminate in hydroxyl or hydrolysable groups selected from -SiOH3, -(Ra)SiOH2, - (FT)2SiOH,
-RaSi(ORb)2, -Si(ORb)3, -Ra2SiORb and -Ra2 Si -Rc- SiRdp(ORb)3-P where each Ra independently represents a monovalent hydrocarbyl group, each Rb and Rd group is independently an alkyl or alkoxy group in which the alkyl groups suitably have up to 6 carbon atoms; Rc is a divalent hydrocarbon group which may be interrupted by one or more siloxane spacers having up to six silicon atoms; and p has the value O, 1 or 2; and
A is a siloxane containing molecular chain.

11 . A method of making a moisture curable composition capable of cure to an
elastomeric body comprising the steps of mixing the diluted organopolysiloxane polymer obtainable in accordance with any one of claims 1 to 8 with a suitable
cross-linking agent which is reactive with the organopolysiloxane polymer, a
suitable condensation catalyst and optionally filler.

12. A method of making a moisture curable composition capable of cure to an
elastomeric body in accordance with claim 10 wherein the cross-linking agent is one or more silanes or siloxanes which contain acyloxy groups, ketoximino groups and the catalyst is a tin catalyst.

13 A method of making a moisture curable composition capable of cure to an
elastomeric body in accordance with claim 10 wherein the cross-linking agent is one or more silanes or siloxanes which contain alkoxy groups and alkenyloxy groups and the catalyst is a titanate or zirconate or a chelated titanate or zirconate.

14. A method of making a moisture curable composition capable of cure to an
elastomeric body in accordance with any one of claims 8 to 12 one or more finely divided, reinforcing fillers such as high surface area fumed silica, precipitated silica and calcium carbonate and/or extending fillers such as crushed quartz, diatomaceous earth, barium sulphate, iron oxide, titanium dioxide, carbon black, talc or wollastonite.

15. A moisture curable composition capable of cure to an elastomeric body, the
composition comprising
a. A diluted organopolysiloxane having not less than two silicon-bonded
hydroxyl or hydrolysable groups
b. a siloxane and/or silane cross-linker having at least two groups per molecule which are reactable with the hydroxyl or hydrolysable groups in the
polymer
c. one or more fillers and
d. a suitable cure catalyst.

16. A sealant composition in accordance with claim 13 wherein the diluted
organopolysiloxane is made in accordance with the method in accordance with any one of claims 1 to 8.

17. A method of producing a cured silicone elastomer with a surface coated with a
hardened protective coating comprising , exposing a composition in accordance with claim 16 to moisture until a cured elastomeric surface is obtained and a
homogeneous dull surface develops, thereafter applying a water based protective coating composition, hardenable at ambient conditions, over at least a portion of the cured elastomeric surface where the protective coating composition wets the
surface to which it is applied and produces an essentially flaw-free film and,
thereafter, allowing the protective coating composition to harden.

18. A cured sealant comprising the cured composition in accordance with claim 1 or 15 having an extension at break of greater than 700%.

19. A moisture curable composition capable of cure to an elastomeric body, the
composition obtainable by compounding the diluted organopolysiloxane polymer made in accordance with the process in any one of claims 1 to 8 with a suitable cross-linking agent which is reactive with the organopolysiloxane polymer, a
suitable condensation catalyst and optionally filler to form a one or two part
organopolysiloxane sealant composition.

20. A method of sealing a space between two units, said method comprising applying a composition according to any one of Claims 12, 15 or 16 to said space, and causing or allowing the composition to cure

21 . .A sealant comprising the composition in accordance with claim 15 or 16.

22. A glazing structure or building unit which includes a sealant derived from a
composition according to any one of the Claims 1 to 17.

23. Use of an extended polymer prepared in accordance with any of claims 1 to 8 in a sealant.

24. A composition comprising a diluted polymer obtainable in accordance with the
method of claims 1 to 8 wherein the diluent comprises a volatile or non-volatile low molecular weight organopolysiloxane based fluid having a viscosity of between 4 and 100 mPa.s wherein optionally additional diluent comprising said volatile or nonvolatile low molecular weight organopolysiloxane based fluid having a viscosity of between 4 and 100 mPa.s added to the composition subsequent to completion of polymerisation.

25. A composition in accordance with claim 24 additionally comprising one or more surfactants, detergents, thickeners, perfumes, colorants, electrolytes, pH control ingredients, foam boosters and foam stabilizers, antimicrobials, antioxidants,
ultraviolet light absorbers and medicaments dyes, reducing agents, neutralizing agents, and preservatives.

26. Use of a composition in accordance with any one of claims 24 or 25 in a
pharmaceutical, medical and/or therapeutic composition

27. Use of a composition in accordance with claims 24 or 25 in the manufacture of a pharmaceutical, medical and/or therapeutic product for one or more of the following applications, in an analgesic; anesthetic; anti-acne; antibacterial; anti-yeast;
antifungal; antivirals; antidandruff; antidermatitis; antipruritic; antiemetic; anti-motion sickness; anti-inflammatory; antihyperkeratolytic; anti-dry skin; antiperspirant;

antipsoriatic; antiseborrheic; hair conditioning; hair treatment; anti-aging;
antiwrinkle; anti-asthmatic; bronchodilator; sunscreen; antihistamine; skin- lightening; depigmenting; wound-healing; vitamin; corticosteroid; tanning or
hormonal.

28. A pharmaceutical, composition comprising a composition in accordance with claim 24 or 25 and a physiologically and/or pharmaceutically acceptable carrier..

29. A pharmaceutical composition in accordance with claim 28 for topical application comprising an ointment, cream, gel, paste, foam, or aerosol.

30. A hair care product comprising a composition in accordance with claim 24 or 25.

31 . A method of making a silicone rubber composition comprising the steps of :- Preparing a diluted organopolysiloxane containing polymer in accordance with any one of claims 1 to 14 optionally with an alkenyl group, condensable group, silyl- hydride or trimethylsilyl containing end-blocker and a siloxane based diluent;
compounding the resulting diluted organopolysiloxane polymer with
one or more reinforcing and/or non reinforcing fillers and
a curing agent; and
optional additives selected from the group of one or more rheology modifiers,
pigments, colouring agents, anti-adhesive agents, adhesion promoters, blowing agents, fire retardants and dessicants.

32. A method in accordance with claim 31 wherein the curing agent is one or more organic peroxides selected from the group of dialkyl peroxides, diphenyl peroxides, benzoyl peroxide, 1 ,4-dichlorobenzoyl peroxide, 2,4-dichlorobenzoyl peroxide, d\-t- butyl peroxide, dicumyl peroxide, tertiary butyl-perbenzoate, monochlorobenzoyl peroxide, ditertiary-butyl peroxide, 2,5-bis-(tertiarybutyl-peroxy)-2,5- dimethylhexane, tertiary-butyl-trimethyl peroxide, tertiary-butyl-tertiary-butyl-tertiary- triphenyl peroxide, and t-butyl perbenzoate.

33. A method in accordance with claim 31 wherein the polymer comprises
unsaturated groups and the curing agent is a hydrosilylation reaction catalyst in combination with an organohydrogensiloxane

34. A method in accordance with claim 31 wherein the organohydrogensiloxane
comprises from 4-20 silicon atoms per molecule, and have a viscosity of up to about 10 Pa-s at 25 0C.

35. A method in accordance with claim 31 wherein the hydrosilylation catalyst is a
platinum group metal based catalyst selected from a platinum, rhodium, indium, palladium or ruthenium catalyst.