Abstract in which each R'', which may be identical or different, represents an alkyl group with 1 to 5 carbon atoms or a vinyl group, n is zero or 1 and R is as defined above and 5 to 25 parts of an organic derivative of titanium which is selected from an alkyl polytitanate, which is soluble in hydrocarbon solvents, having the average general formula TibOc(OR'''')d in which R'''' represents an alkyl group with 3 to 8 carbon atoms, b represents an integer of at least 2, c represents an integer of at least 1 and d represents an integer of at least 4, and a mixture consisting of at least 5 percent of a said aklyl polytitanate with an alkyl titanate, the alkyl group having 3 to 10 carbon atoms, and/or a titanium chelate. Non-stick coating compositions are provided which are capable of being applied to a very wide range of substrates and which are stable in the atmosphere for 24 hours, the compositions being based on a dimethylpolysiloxane polymer and containing, per 100 parts by weight of the polymer, 1 to 15 parts of a silicate ester which is selected from an alkoxyalkyl silicate of the formula: Si((OCH2CH2)aOR)4 in which R represents an alkyl radical with 1 to 4 carbon atoms and a is 1 or 2, and a cyclic silicate of the formula:
A NON-STICK COATING COMPOSITION PRODUCED BY MIXING THE FOLLOWING INGREDIENTS, PARTS AND PERCENTAGES BEING BY WEIGHT I. 100 PARTS OF A DIMETHYLPOLYSILOXANE WHICH IS: A. AN A-W-DIHYDROXYDINETHYLPOLYSILOXAE GUM HAVING A VISCOSITY OF AT LEAST ABOUT 1 MILLION CENTIPOSISES AT 25*C, OR B. A MIXTURE CONSISTING OF AT LEAST 75% IF A SAUD GUM AND A LOW MOLECULAR WEIGHT DIMETHYLPOLYSILOXANE POLYMER FORMED DURING THE PREPARATION OF A SAID GUM BY POLYMERISATION OF A DIMETHYL-CYCLOPOLYSILOXANE IN THE PRESENCE OF AN ALKALINE OR ACID CATALYST, II. 1 TO 15 PARTS OF A SILICATE ESTER WHICH IS SELECTEC FROM C. AN ALKOXALKYL SILICATE OF THE FORMULA: SI(OCH2CH2)AOR!4 IN WHICH R REPRESENTS AN ALKYL RADICAL WITH 1 TO 4 CARBON AOMS AND A IS 1 OR 2 AND D. A CYCLIC SILICATE OF THE FORMULA:
Claim 2
Dependent Claim
130 words
A NON-STICK COATING COMPOSITION PRODUCED BY MIXING THE FOLLOWING INGREDIENTS, PARTS AND PERCENTAGES BEING BY WEIGHT I. 100 PARTS OF A DIMETHYLPOLYSILOXANE WHICH IS: A. AN A-W-DIHYDROXYDINETHYLPOLYSILOXAE GUM HAVING A VISCOSITY OF AT LEAST ABOUT 1 MILLION CENTIPOSISES AT 25*C, OR B. A MIXTURE CONSISTING OF AT LEAST 75% IF A SAUD GUM AND A LOW MOLECULAR WEIGHT DIMETHYLPOLYSILOXANE POLYMER FORMED DURING THE PREPARATION OF A SAID GUM BY POLYMERISATION OF A DIMETHYL-CYCLOPOLYSILOXANE IN THE PRESENCE OF AN ALKALINE OR ACID CATALYST, II. 1 TO 15 PARTS OF A SILICATE ESTER WHICH IS SELECTEC FROM C. AN ALKOXALKYL SILICATE OF THE FORMULA: SI(OCH2CH2)AOR!4 IN WHICH R REPRESENTS AN ALKYL RADICAL WITH 1 TO 4 CARBON AOMS AND A IS 1 OR 2 AND D. A CYCLIC SILICATE OF THE FORMULA:
Claim 3
Dependent Claim
14 words
A composition according to claim 1 in which the silicate ester has the formula:
Claim 4
Dependent Claim
40 words
A composition according to claim 1 in which the organic derivative of titanium is a butyl polytitanate containing 33 percent by weight of titanium oxide or a mixture thereof with isopropyl titanate, butyl titanate or a chelate of the formula:
Claim 5
Dependent Claim
47 words
A composition according to claim 1 which consists, per 100 parts of dimethylpolysiloxane, of 2 to 12 parts of the silicate ester, 6 to 22 parts of the organic derivative of titanium, 0.5 to 6 parts of the catalyst and 800 to 3500 parts of the solvent.
Claim 6
Dependent Claim
16 words
A composition according to claim 4 in which the silicate ester is selected from the formulae: