US4596840A — Mixture for the production of acid-resistant seal…

Claim 1

Independent Claim 193 words

A mixture for the production of acid-resistant sealing materials or acid-resistant impregnating materials, wherein these are in the form of cements or impregnating solutions containing as essential constitutents (A) at least one bifunctional, low-molecular liquid epoxy resin having an epoxide equivalent weight between 87 and 1,000, (B) at least one resol formed from at least one trifunctional phenol and formaldehyde in the form of an aqueous solution or a melt in a molar ratio of 1:1 to 1:3, having a viscosity between 50 and 2,500 mPa.s at 20° C. and having a solids content of at least 50% by weight, and (C) hardening catalysts, in the form of acids or materials which split off acids, of 0.05 to 10% by weight, calculated in relation to the sum of the components (A) to (C), and cements containing (D) fillers, in a ratio of weight based on the sum of the components (A) to (C) in relation to the filler of 1:1 to 1:7, (B) being calculated in each case as 100% strength resol, and wherein the ratio by weight between the components (A) and (B) is 1:99 to 30:70 relative to 100% strength resol.

Claim 2

Dependent Claim 193 words

A mixture for the production of acid-resistant sealing materials or acid-resistant impregnating materials, wherein these are in the form of cements or impregnating solutions containing as essential constitutents (A) at least one bifunctional, low-molecular liquid epoxy resin having an epoxide equivalent weight between 87 and 1,000, (B) at least one resol formed from at least one trifunctional phenol and formaldehyde in the form of an aqueous solution or a melt in a molar ratio of 1:1 to 1:3, having a viscosity between 50 and 2,500 mPa.s at 20° C. and having a solids content of at least 50% by weight, and (C) hardening catalysts, in the form of acids or materials which split off acids, of 0.05 to 10% by weight, calculated in relation to the sum of the components (A) to (C), and cements containing (D) fillers, in a ratio of weight based on the sum of the components (A) to (C) in relation to the filler of 1:1 to 1:7, (B) being calculated in each case as 100% strength resol, and wherein the ratio by weight between the components (A) and (B) is 1:99 to 30:70 relative to 100% strength resol.

Claim 3

Dependent Claim 17 words

A mixture as claimed in claim 1, wherein the molor ratio in the component B) is 1:1.3-2.5.

Claim 4

Dependent Claim 14 words

A mixture as claimed in claim 1, wherein the ratio is 5:95 to 20:80.

Claim 5

Dependent Claim 35 words

A mixture as claimed in claim 1 wherein the proportion of component (C) is 0.2 5% by weight and the ratio of fillers to the sum of components (A) to (C) is 1:1.5 to 1:5.

Claim 6

Dependent Claim 46 words

A mixture as claimed in claim 1, wherein the hardening catalysts employed are at least one component selected from the group consisting of inorganic acids, acid salts, sulfonic acids, and any of their chlorides and esters having 1 to 12 carbon atoms in the esters group.

Claim 7

Dependent Claim 194 words

A process for the preparation of hardening products which comprises adding a mixture composed of (A) at least one bifunctional, low-molecular liquid epoxy resin having an epoxide equivalent weight between 87 to 1,000, (B) at least one resol formed from at least one trifunctional phenol and formaldehyde in the form of an aqueous solution or a melt in a molar ratio of 1:1 to 1:3, having a viscosity between 50 and 2,500 mPa.s at 20° C. and having a solids content of at least 50% by weight, with (C) a hardening catalyst, in the form of acids or materials which split off acids, of 0.05 to 10% by weight, calculated in relation to the sum of the components (A) to (C), and, in addition, (D) fillers to cements in a ratio by weight based on a sum of the components (A) to (C) in relation to the filler of 1:1 to 1:7, (B) being calculated in each case as 100% strength resol, and hardening this mixture at temperatures between 10° and 170° C., and wherein the ratio by weight between the components (A) and (B) is 1:99 to 30:70 relative to 100% strength resol.

Claim 8

Dependent Claim 194 words

A process for the preparation of hardening products which comprises adding a mixture composed of (A) at least one bifunctional, low-molecular liquid epoxy resin having an epoxide equivalent weight between 87 to 1,000, (B) at least one resol formed from at least one trifunctional phenol and formaldehyde in the form of an aqueous solution or a melt in a molar ratio of 1:1 to 1:3, having a viscosity between 50 and 2,500 mPa.s at 20° C. and having a solids content of at least 50% by weight, with (C) a hardening catalyst, in the form of acids or materials which split off acids, of 0.05 to 10% by weight, calculated in relation to the sum of the components (A) to (C), and, in addition, (D) fillers to cements in a ratio by weight based on a sum of the components (A) to (C) in relation to the filler of 1:1 to 1:7, (B) being calculated in each case as 100% strength resol, and hardening this mixture at temperatures between 10° and 170° C., and wherein the ratio by weight between the components (A) and (B) is 1:99 to 30:70 relative to 100% strength resol.

Claim 9

Dependent Claim 21 words

Process as claimed in claim 6, wherein the hardening temperature in the case of cements is between 10° and 120° C.

Claim 10

Dependent Claim 15 words

Process as claimed in claim 7 wherein the temperature is between 10° and 80° C.

Claim 11

Dependent Claim 15 words

Process as claimed in claim 8, wherein the temperature is between 15° and 35° C.

Claim 12

Dependent Claim 34 words

Process as claimed in claim 6, wherein the hardening temperature in the case of impregnating solutions is between 130° and 170° C., and latent hardeners are employed as component (C) in the hardening process.

Claim 13

Dependent Claim 15 words

Process as claimed in claim 10, wherein the temperature is between 130° and 160° C.

Claim 14

Dependent Claim 16 words

Process as claimed in claim 7, wherein the molar ratio in the component (B) is 1:1.3-2.5.

Claim 15

Dependent Claim 15 words

Process as claimed in claim 6, wherein the ratio is 5:95 to 20 to 80.

Claim 16

Dependent Claim 35 words

Process as claimed in claim 6, wherein the proportion of component (C) is 0.2 to 5% by weight and the ratio of fillers to the sum of components (A) to (C) is 1:1.5 to 1.5.

Claim 17

Dependent Claim 45 words

Process as claimed in claim 7, wherein the hardening catalysts employed are at least one component selected from the group consisting of inorganic acids, acid salts, sulfonic acids, and any of their chlorides and esters having 1 to 12 carbon atoms in the ester group.

Claim 18

Dependent Claim 27 words

An impervious, initially porous shaped article composed of graphite, ceramics or sintered metal which has been produced by means of impregnating solutions as claimed in claim 1.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1989-06-23	1989-12-23	1990-06-24	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1993-06-23	1993-12-23	1994-06-24	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1997-06-23	1997-12-23	1998-06-24	$7700.00	Window Closed / Lapsed

Mixture for the production of acid-resistant sealing materials and impregnating materials, a process for their preparation and their use

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