Rapid-hardening underground pipeline grouting repair polymer and preparing method

Abstract

The present invention provides a rapid-hardening underground pipeline grouting repair polymer and a preparing method thereof for underground pipes. The rapid-hardening underground pipeline grouting repair polymer comprises the base resin and the hardener, weight ratio of which is 2:1-1:1. The base resin comprises 50 to 160 parts by weight of an isocyanate; 20 to 100 parts of a chlorophosphate mixture with a density over 1400 kg/m.sup.3; a parts by weight ratio of the isocyanate and chlorophosphate is 1:1-4:1. The hardener comprises 30 to 60 parts by weight of a chlorophosphate mixture with a density over 1400 kg/m.sup.3, 5 to 15 parts of a propyl formate, a methyl propionate or a mixture of a propyl formate and a methyl propionate, 15 to 55 parts of a polyol, 1 to 3 parts of a surfactant, 2 to 6 parts of a catalyst, 0 to 0.5 parts of water and 0 to 1 parts of a colorant.

Claims

1. A rapid-hardening underground pipeline grouting repair polymer, comprising: a base resin and a hardener, a weight ratio of which is 2:1-1:1; wherein the base resin comprises 50 to 160 parts by weight of an isocyanate; 20 to 100 parts by weight of a chlorinated phosphate ester mixture with a density over 1400 kg/m.sup.3; a ratio of parts by weight of the isocyanate and the chlorinated phosphate ester is 1:1-4:1; the hardener comprises 30 to 60 parts by weight of the chlorinated phosphate ester mixture with a density over 1400 kg/m.sup.3, 5 to 15 parts by weight of a propyl formate, a methyl propionate or a mixture of the propyl formate and the methyl propionate, 15 to 55 parts by weight of a polyol, 1 to 3 parts by weight of a surfactant, 2 to 6 parts by weight of a catalyst, 0 to 0.5 parts by weight of water and 0 to 1 parts by weight of a colorant.

2. The rapid-hardening underground pipeline grouting repair polymer, as recited in claim 1, wherein the surfactant is a non-silicone surfactant.

3. The rapid-hardening underground pipeline grouting repair polymer, as recited in claim 1, wherein the surfactant is selected from the group consisting of a surfactant A, a surfactant B and a surfactant C; wherein the surfactant A is a polyurethane cell stabilizer surfactant which is a liquid polymer-polyol product comprising a copolymer of N-vinyl pyrrolidone and a dibutyl maleate polymerized in a trifunctional polyol; the surfactant B is a unique organic surfactant for use in rigid polyurethane applications to provide a smooth surface; the surfactant C is a non-silicone surfactant.

4. The rapid-hardening underground pipeline grouting repair polymer, as recited in claim 1, wherein the isocyanate is selected from the group consisting of a PAPI (polyaryl polymethylene isocyanates), a MDI (Methylenediphenyl Diisocyanate), a TDI (Toluene diisocyanate), a modified PAPI, a modified MDI and a modified TDI.

5. The rapid-hardening underground pipeline grouting repair polymer, as recited in claim 1, wherein the polyol is selected from the group consisting of a sucrose polyether polyol, a sorbitol polyether polyol, a polyether polyol prepared by small molecular alcohol, an amine initiated polyether polyol, a phthalic anhydride based polyester polyol and an adipic acid polyether polyol.

Description

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Embodiment 1

(1) The rapid-hardening underground pipeline grouting repair polymer comprises a base resin and a hardener, the weight ratio of which is 2:1-1:1; wherein

(2) the base resin comprises 50 to 160 parts by weight of an isocyanate; 20 to 100 parts by weight of a chlorophosphate mixture with a density over 1400 kg/m.sup.3; a parts by weight ratio of the isocyanate and chlorophosphate is 1:1-4:1;

(3) the hardener comprises 30 to 60 parts by weight of a chlorophosphate mixture with a density over 1400 kg/m.sup.3, 5 to 15 parts by weight of a propyl formate, a methyl propionate or a mixture of a propyl formate and a methyl propionate, 15 to 55 parts by weight of a polyol, 1 to 3 parts by weight of a surfactant, 2 to 6 parts by weight of a catalyst, 0 to 0.5 parts by weight of water and 0 to 1 parts by weight of a colorant.

(4) The catalyst is selected from the group consisting of a catalyst PT303, a catalyst PT304 and a catalyst PT306.

(5) The surfactant is an agent for stabilizing the foaming, realizing compact and uniform foam pore arrangement, unbroken foam pores. The surfactant is selected from the group consisting of a LK221, a LK443 or a LK665; wherein LK221 is a polyurethane cell stabilizer surfactant supplied which is a liquid polymer-polyol product comprising the copolymer of N-vinyl pyrrolidone and dibutyl maleate polymerized in a trifunctional polyol; LK443 is a unique organic surfactant for use in rigid polyurethane applications to provide a smooth surface; LK665 is a non-silicone surfactant.

(6) A method of preparing the rapid-hardening underground pipeline grouting repair polymer comprises steps of: 1) weighing materials for preparing the base resin and the hardener according to the parts of weight 2) adding the materials for preparing the base resin into a reaction vessel;

(7) stirring the materials for 26 min-34 min to achieve the base resin; and 3) adding the materials for preparing the hardener into a reaction vessel;

(8) stirring the materials for 26 min-34 min to achieve the hardener.

(9) To store the base resin and the hardener separately for longer retention time when no need for mixture.

Embodiment 2

(10) The rapid-hardening underground pipeline grouting repair polymer comprises a base resin and a hardener, the weight ratio of which is 2:1-1:1; wherein the base resin comprises 50 to 160 parts by weight of an isocyanate; 20 to 100 parts by weight of a chlorophosphate mixture with a density over 1400 kg/m.sup.3; a parts by weight ratio of the isocyanate and chlorophosphate is 1:1-4:1;

(11) the hardener comprises 30 to 60 parts by weight of a chlorophosphate mixture with a density over 1400 kg/m.sup.3, 5 to 15 parts by weight of a propyl formate, a methyl propionate or a mixture of a propyl formate and a methyl propionate, 15 to 55 parts by weight of a polyol, 1 to 3 parts by weight of a surfactant, 2 to 6 parts by weight of a catalyst, 0 to 0.5 parts by weight of water and 0 to 1 parts by weight of a colorant.

(12) The catalyst is selected from the group consisting of a catalyst PT303, a catalyst PT304 and a catalyst PT306. The surfactant is a non-silicone surfactant.

(13) The method of preparing the rapid-hardening underground pipeline grouting repair polymer, comprises steps: 1) weighing materials for preparing the base resin and the hardener according to the parts of weight 2) adding the materials for preparing the base resin into a reaction vessel; stirring the materials for 26 min-34 min to achieve the base resin; and 3) adding the materials for preparing the hardener into a reaction vessel;

(14) stirring the materials for 26 min-34 min to achieve the hardener.

Embodiment 3

(15) The rapid-hardening underground pipeline grouting repair polymer comprises a base resin and a hardener, the composition of which is measured by parts of weight. The weight of compositions by parts of the base resin is listed in the following chart 1-1:

(16) TABLE-US-00001 CHART 1-1 weight of compositions by parts of the base resin Type Brand and manufacturer Parts of weight PAPI (polyaryl WANNATE 2208 (Wanhua 80 polymethylene isocyanates) Chemical Group Co., Ltd.) Modified isocyanate WANNATE 8211 (Wanhua 60 Chemical Group Co., Ltd.) chlorophosphate mixture WSFR-A300TB (Zhejiang 60 Wansheng Co., Ltd.) Total 200

(17) The weight by parts of the compositions of hardener is listed in the following chart 1-2:

(18) TABLE-US-00002 CHART 1-2 weight by parts of the compositions of hardener Type Brand and manufacturer Parts of weight chlorophosphate mixture WSFR-A300TB (Zhejiang 40 Wansheng Co., Ltd.) propyl formate propyl formate (Chemically 5 pure) propyl formate methyl propionate 3 (Chemically pure) polyester polyol PS3152 (Nanjing Stepan 32 Jinling Chemical Co., Ltd.) polyether polyol R2304 (Wanhua Chemical 16 (Ningbo) Rongwei Polyurethane Co., Ltd.) surfactant LK221 (Evonik Industries 1 AG) catalyst PT303 (Evonik Industries 0.4 AG) catalyst PT304 (Evonik Industries 0.8 AG) catalyst PT306 (Evonik Industries 1.5 AG) water Distilled water or public 0.05 water supply colorant 036-2M1941 (BOMEX 0.25 Chemical (Shanghai) Co., Ltd.) total 100

(19) The method of preparing the rapid-hardening underground pipeline grouting repair polymer, comprises steps of: 1) weighing materials for preparing the base resin and the hardener according to the parts of weight 2) adding the isocyanate and chlorophosphate for preparing the base resin into a reaction vessel; stirring the materials for 26 min to achieve the base resin; and 3) adding the materials for preparing the hardener into a reaction vessel; stirring the materials for 26 min to achieve the hardener.

(20) Mixing the prepared base resin and the hardener of the rapid-hardening underground pipeline grouting repair polymer to grout pipe by the high-pressure grouting machine produced by Zhengzhou Dannate Inspection & Testing Techonology Co., Ltd. The color of the slurry after consolidation is grey. The physical features of the slurry are listed in the following chart 1-3:

(21) TABLE-US-00003 CHART 1-3 Physical feature Unit Test result Test standard Consolidation time s 9.5 Measure by eyes Appearance — Evenly Measure by eyes distributed grey Density Kg/m.sup.3 137 GB/T 6343-2009 Compression strength mPa 1.2 GB/T 8813-2008 Fire-resistant rating — C GB8624-2016 Water Left arsenic mg/L ND GB/T 17219-1998 after cadmium ND consolidation copper ND lead ND mercury 0.00023 Hexavalent ND chromium

Embodiment 4

(22) The rapid-hardening underground pipeline grouting repair polymer comprises a base resin and a hardener, the composition of which is measured by parts of weight. The weight of compositions by parts of the base resin is listed in the following chart 2-1:

(23) TABLE-US-00004 CHART 2-1 weight of compositions by parts of the base resin Type Brand and manufacturer Parts of weight PAPI (polyaryl WANNATE 2208 (Wanhua 105 polymethylene isocyanates) Chemical Group Co., Ltd.) isocyanate MDI 100LL (Wanhua 15 Chemical Group Co., Ltd.) chlorophosphate mixture WSFR-A300TB (Zhejiang 30 Wansheng Co., Ltd.) Total 150

(24) The weight by parts of the compositions of hardener is listed in the following chart 2-2:

(25) TABLE-US-00005 CHART 2-2 weight by parts of the compositions of hardener Type Brand and manufacturer Parts of weight chlorophosphate mixture WSFR-A300TB (Zhejiang 30 Wansheng Co., Ltd.) propyl formate propyl formate (Chemically 5 pure) polyester polyol PS3152 (Nanjing Stepan 18 Jinling Chemical Co., Ltd.) polyether polyol R2304 (Wanhua Chemical 38.4 (Ningbo) Rongwei Polyurethane Co., Ltd.) surfactant LK443 (Evonik Industries 3 AG) catalyst PT303 (Evonik Industries 0.9 AG) catalyst PT304 (Evonik Industries 1.4 AG) catalyst PT306 (Evonik Industries 2.7 AG) water Distilled water or public 0 water supply colorant 036-2M1941(BOMEX 0.6 Chemical (Shanghai) Co., Ltd.) total 100

(26) The method of preparing the rapid-hardening underground pipeline grouting repair polymer, comprises steps of: 1) weighing materials for preparing the base resin and the hardener according to the parts of weight 2) adding the materials for preparing the base resin into a reaction vessel;

(27) stirring the materials for 34 min to achieve the base resin; and 3) adding the materials for preparing the hardener into a reaction vessel; stirring the materials for 34 min to achieve the hardener.

(28) Mixing the prepared base resin and the hardener of the rapid-hardening underground pipeline grouting repair polymer to grout pipe by the high-pressure grouting machine produced by Zhengzhou Dannate Inspection & Testing Techonology Co., Ltd. The color of the slurry after consolidation is grey. The physical features of the slurry are listed in the following chart 2-3:

(29) TABLE-US-00006 CHART 2-3 Physical feature Unit Test result Test standard Consolidation time s 9.0 Measure by eyes Appearance — Evenly Measure by eyes distributed grey Density Kg/m.sup.3 124 GB/T 6343-2009 Compression strength mPa 1.0 GB/T 8813-2008 Fire-resistant rating — C GB8624-2016 Water Left arsenic mg/L ND GB/T 17219-1998 after cadmium ND consolidation copper ND lead ND mercury 0.00022 Hexavalent ND chromium

Embodiment 5

(30) The rapid-hardening underground pipeline grouting repair polymer comprises a base resin and a hardener, the composition of which is measured by parts of weight. The weight of compositions by parts of the base resin is listed in the following chart 3-1:

(31) TABLE-US-00007 CHART 3-1 weight of compositions by parts of the base resin Type Brand and manufacturer Parts of weight PAPI (polyaryl WANNATE 2208 (Wanhua 70 polymethylene isocyanates) Chemical Group Co., Ltd.) chlorophosphate mixture WSFR-A300TB (Zhejiang 30 Wansheng Co., Ltd.) Total 100

(32) The weight by parts of the compositions of hardener is listed in the following chart 2-2:

(33) TABLE-US-00008 CHART 3-2 weight by parts of the compositions of hardener Type Brand and manufacturer Parts of weight chlorophosphate mixture WSFR-A300TB (Zhejiang 35 Wansheng Co., Ltd.) propyl formate propyl formate (Chemically 5 pure) polyester polyol PS3152 (Nanjing Stepan 5 Jinling Chemical Co., Ltd.) polyether polyol R2304 (Wanhua Chemical 43 (Ningbo) Rongwei Polyurethane Co., Ltd.) surfactant LK665 (Evonik Industries 2 AG) catalyst PT303 (Evonik Industries 0.8 AG) catalyst PT304 (Evonik Industries 1.2 AG) catalyst PT306 (Evonik Industries 2 AG) water Distilled water or public 0 water supply colorant 036-2M1941(BOMEX 1 Chemical (Shanghai) Co., Ltd.) total 100

(34) The method of preparing the rapid-hardening underground pipeline grouting repair polymer, comprises steps of: 1) weighing materials for preparing the base resin and the hardener according to the parts of weight 2) adding the materials for preparing the base resin into a reaction vessel; stirring the materials for 30 min to achieve the base resin; and 3) adding the materials for preparing the hardener into a reaction vessel;

(35) stirring the materials for 30 min to achieve the hardener.

(36) Mixing the prepared base resin and the hardener of the rapid-hardening underground pipeline grouting repair polymer to grout pipe by the high-pressure grouting machine produced by Zhengzhou Dannate Inspection & Testing Techonology Co., Ltd. The color of the slurry after consolidation is grey. The physical features of the slurry are listed in the following chart 3-3:

(37) TABLE-US-00009 CHART 3-3 Physical feature Unit Test result Test standard Consolidation time s 8.5 Measure by eyes Appearance — Evenly Measure by eyes distributed grey Density Kg/m.sup.3 106 GB/T 6343-2009 Compression strength mPa 0.9 GB/T 8813-2008 Fire-resistant rating — C GB8624-2016 Water Left arsenic mg/L ND GB/T 17219-1998 after cadmium ND consolidation copper ND lead ND mercury 0.00022 Hexavalent ND chromium

(38) The parts by weight ratio of the rapid-hardening underground pipeline grouting repair polymer is also as described by the below embodiments.

Embodiment 6

(39) The rapid-hardening underground pipeline grouting repair polymer comprises the base resin and the hardener; wherein the base resin comprises 50 parts by weight of an isocyanate; 50 parts by weight of the chlorophosphate mixture with a density over 1400 kg/m.sup.3;

(40) the hardener comprises 30 parts by weight of the chlorophosphate mixture with a density over 1400 kg/m.sup.3, 7 parts by weight of the propyl formate, 15 parts by weight of the polyol, 1 parts by weight of the surfactant, 2 parts by weight of the catalyst;

(41) the isocyanate is the MDI(Methylenediphenyl Diisocyanate); the polyol is a sucrose polyether polyol; the catalyst comprises PT303 0.4 parts, PT304 0.6 parts and PT306 1 parts;

(42) the surfactant comprises LK221 0.2 parts, LK443 0.4 parts and LK665 0.4 parts

(43) The method for preparing the rapid-hardening underground pipeline grouting repair polymer is described in the embodiment 1, which is mixing the material for preparing the base resin to achieve the base resin and mixing the material for preparing hardener to achieve the hardener.

Embodiment 7

(44) The rapid-hardening underground pipeline grouting repair polymer comprises the base resin and the hardener; wherein the base resin comprises 160 parts by weight of the isocyanate; 100 parts by weight of the chlorophosphate mixture with a density over 1400 kg/m.sup.3;

(45) the hardener comprises 60 parts by weight of a chlorophosphate mixture with a density over 1400 kg/m.sup.3, 15 parts by weight of the methyl propionate, 55 parts by weight of the polyol, 3 parts by weight of the surfactant, 6 parts by weight of the catalyst, 0.5 parts of water and 1 part of colorant;

(46) the isocyanate is the TDI (Toluene diisocyanate); the polyol is the sorbitol polyether polyol; the catalyst comprises PT303 1.3 parts, PT304 2.0 parts and PT306 2.7 parts;

(47) the surfactant comprises LK221 2 parts, LK443 1 part.

(48) The method for preparing the rapid-hardening underground pipeline grouting repair polymer is described in the embodiment 1, which is mixing the material for preparing the base resin to achieve the base resin and mixing the material for preparing hardener to achieve the hardener.

Embodiment 8

(49) The rapid-hardening underground pipeline grouting repair polymer comprises the base resin and the hardener; wherein the base resin comprises 50 parts by weight of an isocyanate; 20 parts by weight of the chlorophosphate mixture with a density over 1400 kg/m.sup.3;

(50) the hardener comprises 30 parts by weight of the chlorophosphate mixture with a density over 1400 kg/m.sup.3, 3 parts by weight of the propyl formate, 2 parts by weight of the methyl propionate, 15 parts by weight of the polyol, 1 parts by weight of the surfactant, 2 parts by weight of the catalyst and 0.5 parts by weight of water;

(51) the isocyanate comprises 20 parts by weight of PAPI and 30 parts by weight of MDI; the polyol comprises 2 parts by weight of the phthalic anhydride polyester polyol and 13 parts by weight of the adipic acid polyester polyol;

(52) the catalyst comprises PT303 0.4 parts, PT304 0.6 parts and PT306 1 parts;

(53) the surfactant comprises LK443 0.8 parts, LK665 0.2 parts

(54) The method for preparing the rapid-hardening underground pipeline grouting repair polymer is described in the embodiment 1, which is mixing the material for preparing the base resin to achieve the base resin and mixing the material for preparing hardener to achieve the hardener.

Embodiment 9

(55) The rapid-hardening underground pipeline grouting repair polymer comprises a base resin and a hardener; wherein the base resin comprises 80 parts by weight of the isocyanate; 20 parts by weight of the chlorophosphate mixture with a density over 1400 kg/m.sup.3;

(56) the hardener comprises 50 parts by weight of a chlorophosphate mixture with a density over 1400 kg/m.sup.3, 3 parts by weight of a propyl formate, 3 parts by weight of methyl propionate, 35 parts by weight of a polyol, 3 parts by weight of the surfactant, 3 parts by weight of the catalyst, 0.2 parts by weight of water and 0.5 parts by weight of colorant;

(57) the isocyanate comprises 100 parts by weight of MDI and 60 parts by weight of TDI; the polyol is an adipic acid polyester polyol;

(58) the catalyst comprises PT303 0.5 parts, PT304 0.9 parts and PT306 1.6 parts;

(59) the surfactant comprises LK221 0.9 parts, LK443 2.1 parts

(60) The method for preparing the rapid-hardening underground pipeline grouting repair polymer is described in the embodiment 1, which is mixing the material for preparing the base resin to achieve the base resin and mixing the material for preparing hardener to achieve the hardener.

Embodiment 10

(61) The rapid-hardening underground pipeline grouting repair polymer comprises the base resin and the hardener; wherein the base resin comprises 60 parts by weight of the isocyanate; 20 parts by weight of the chlorophosphate mixture with a density over 1400 kg/m.sup.3;

(62) the hardener comprises 40 parts by weight of the chlorophosphate mixture with a density over 1400 kg/m.sup.3, 5 parts by weight of the propyl formate, 2 parts by weight of methyl propionate, 20 parts by weight of the polyol, 1 part by weight of the surfactant, 5 parts by weight of the catalyst, 0.5 parts by weight of water and 1 part by weight of the colorant;

(63) the isocyanate comprises 20 parts by weight of MDI and 40 parts by weight of modified TDI;

(64) the polyol comprises 5 parts by weight of sucrose polyether polyol, 6 parts by weight of the sorbitol polyether polyol, 3 parts by weight of the phthalic anhydride based polyester polyol and 6 parts by weight of an adipic acid polyester polyol;

(65) the catalyst comprises PT303 0.7 parts, PT304 1.6 parts and PT306 2.7 parts;

(66) the surfactant comprises LK221 0.5 parts, LK665 0.5 parts

(67) The method for preparing the rapid-hardening underground pipeline grouting repair polymer is described in the embodiment 1, which is mixing the material for preparing the base resin to achieve the base resin and mixing the material for preparing hardener to achieve the hardener.

Embodiment 11

(68) The rapid-hardening underground pipeline grouting repair polymer comprises a base resin and a hardener; wherein the base resin comprises 120 parts by weight of the isocyanate; 60 parts by weight of the chlorophosphate mixture with a density over 1400 kg/m.sup.3;

(69) the hardener comprises 45 parts by weight of the chlorophosphate mixture with a density over 1400 kg/m.sup.3, 5 parts by weight of a propyl formate, 6 parts by weight of methyl propionate, 30 parts by weight of a polyol, 1.5 parts by weight of a surfactant, 4.5 parts by weight of a catalyst, 0.5 parts by weight of water and 0.5 parts by weight of colorant;

(70) the isocyanate is modified TDI; the polyol comprises 20 parts by weight of the sorbitol polyether polyol and 10 parts by weight of a phthalic anhydride based polyester ro polyol;

(71) the catalyst comprises PT303 0.9 parts, PT304 1.4 parts and PT306 2.2 parts;

(72) the surfactant is LK221.

(73) The method for preparing the rapid-hardening underground pipeline grouting repair polymer is described in the embodiment 1, which is mixing the material for preparing the base resin to achieve the base resin and mixing the material for preparing hardener to achieve the hardener.

Embodiment 12

(74) The rapid-hardening underground pipeline grouting repair polymer comprises a base resin and a hardener; wherein the base resin comprises 60 parts by weight of the isocyanate; 40 parts by weight of the chlorophosphate mixture with a density over 1400 kg/m.sup.3;

(75) the hardener comprises 60 parts by weight of the chlorophosphate mixture with a density over 1400 kg/m.sup.3, 6 parts by weight of methyl propionate, 18 parts by weight of a polyol, 1 part by weight of a surfactant, 5 parts by weight of a catalyst, 0.4 parts by weight of water and 0.6 parts by weight of colorant;

(76) the isocyanate is modified PAPI; the polyol comprises 6 parts by weight of the polyether polyol prepared by small molecular alcohol and 12 parts by weight of the amine initiated polyether polyol;

(77) the catalyst comprises PT303 0.9 parts, PT304 1.6 parts and PT306 2.5 parts;

(78) the surfactant is LK443.

(79) The method for preparing the rapid-hardening underground pipeline grouting repair polymer is described in the embodiment 1, which is mixing the material for preparing the base resin to achieve the base resin and mixing the material for preparing hardener to achieve the hardener.

Embodiment 13

(80) The rapid-hardening underground pipeline grouting repair polymer comprises a base resin and a hardener; wherein the base resin comprises 75 parts by weight of the isocyanate; 45 parts by weight of the chlorophosphate mixture with a density over 1400 kg/m.sup.3;

(81) the hardener comprises 35 parts by weight of the chlorophosphate mixture with a density over 1400 kg/m.sup.3, 4 parts by weight of propyl formate, 5 parts by weight of methyl propionate, 18 parts by weight of a polyol, 1.2 parts by weight of a surfactant, 2.5 parts by weight of a catalyst, 0.1 parts by weight of water and 0.3 parts by weight of colorant;

(82) the isocyanate is modified TDI; the polyol is the sucrose polyether polyol;

(83) the catalyst comprises PT303 0.5 parts, PT304 0.8 parts and PT306 1.2 parts;

(84) the surfactant comprises LK221 0.8 parts and LK443 0.4 parts.

(85) The method for preparing the rapid-hardening underground pipeline grouting repair polymer is described in the embodiment 1, which is mixing the material for preparing the base resin to achieve the base resin and mixing the material for preparing hardener to achieve the hardener.

Embodiment 14

(86) The rapid-hardening underground pipeline grouting repair polymer comprises a base resin and a hardener; wherein the base resin comprises 150 parts by weight of the isocyanate; 38 parts by weight of the chlorophosphate mixture with a density over 1400 kg/m.sup.3;

(87) the hardener comprises 60 parts by weight of the chlorophosphate mixture with a density over 1400 kg/m.sup.3, 9 parts by weight of propyl formate, 50 parts by weight of a polyol, 2 parts by weight of a surfactant, 4 parts by weight of a catalyst, 0.3 parts by weight of water and 0.8 parts by weight of colorant;

(88) the isocyanate comprises 20 parts by weight of MDI, 30 parts by weight of the TDI, 40 parts by weight of modified MDI and 60 parts by weight of modified TDI;

(89) the polyol comprises 30 parts by weight of the sucrose polyether polyol, 10 parts by weight of the sorbitol polyether polyol and 10 parts by weight of phthalic anhydride based polyester polyol;

(90) the catalyst comprises PT303 0.8 parts, PT304 1.2 parts and PT306 2 parts;

(91) the surfactant comprises LK221 1 part, LK443 0.5 parts and LK665 0.5 parts.

(92) The method for preparing the rapid-hardening underground pipeline grouting repair polymer is described in the embodiment 1, which is mixing the material for preparing the base resin to achieve the base resin and mixing the material for preparing hardener to achieve the hardener.

Embodiment 15

(93) The rapid-hardening underground pipeline grouting repair polymer comprises a base resin and a hardener; wherein the base resin comprises 120 parts by weight of the isocyanate; 70 parts by weight of the chlorophosphate mixture with a density over 1400 kg/m.sup.3;

(94) the hardener comprises 50 parts by weight of the chlorophosphate mixture with a density over 1400 kg/m.sup.3, 6 parts by weight of propyl formate, 3 parts by weight of methyl propionate, 45 parts by weight of a polyol, 2 parts by weight of a surfactant, 3 parts by weight of a catalyst, 0.3 parts by weight of water and 0.2 parts by weight of colorant;

(95) the isocyanate comprises 30 parts by weight of PAPI, 30 parts by weight of the MDI, 30 parts by weight of TDI, 10 parts by weight of modified MDI and 20 parts by weight of modified TDI;

(96) the polyol comprises 10 parts by weight of the sucrose polyether polyol and 30 parts by weight of the sorbitol polyether polyol;

(97) the catalyst comprises PT303 0.6 parts, PT304 1.0 parts and PT306 1.4 parts;

(98) the surfactant comprises LK221 1 part and LK665 1 part.

(99) The method for preparing the rapid-hardening underground pipeline grouting repair polymer is described in the embodiment 1, which is mixing the material for preparing the base resin to achieve the base resin and mixing the material for preparing hardener to achieve the hardener.

Embodiment 16

(100) The rapid-hardening underground pipeline grouting repair polymer comprises a base resin and a hardener; wherein the base resin comprises 80 parts by weight of the isocyanate; 70 parts by weight of the chlorophosphate mixture with a density over 1400 kg/m.sup.3;

(101) the hardener comprises 45 parts by weight of the chlorophosphate mixture with a density over 1400 kg/m.sup.3, 6 parts by weight of propyl formate, 4 parts by weight of methyl propionate, 29 parts by weight of a polyol, 1.2 parts by weight of a non-silicone surfactant, 3.5 parts by weight of a catalyst, 0.4 parts by weight of water and 0.6 parts by weight of colorant;

(102) the isocyanate comprises 60 parts by weight of TDI and 20 parts by weight of the modified TDI;

(103) the polyol comprises 15 parts by weight of the phthalic anhydride based polyester polyol and 14 parts by weight of adipic acid polyester polyol;

(104) the catalyst comprises PT303 0.6 parts, PT304 1.1 parts and PT306 1.8 parts.

(105) The method for preparing the rapid-hardening underground pipeline grouting repair polymer is described in the embodiment 1, which is mixing the material for preparing the base resin to achieve the base resin and mixing the material for preparing hardener to achieve the hardener.

(106) The above mentioned embodiments are exemplary and just for better illustrating the present invention, which are not a limit. The skilled in the art is able to modify and improve the present invention without departure from the structural principles of the present invention. These modifications and improvements are within the protection range of the present invention.