Dendritic polymer, dendritic polymer monomer, and hyperbranched copolymer

Patent metadata

Field	Value
Publication number	US-10047200-B2
Application number	US-201615253079-A
Country	US
Kind code	B2
Filing date	Aug 31, 2016
Priority date	Jun 25, 2013
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

A dendritic polymer, a dendritic polymer monomer, and a hyperbranched copolymer are described. The dendritic polymer monomer has a structure denoted by Z′-(Q)n-Y, wherein Z′ represents a structure denoted by the following formula (a) and/or formula (b), Q represents a dendritic constitutional repeating unit of the dendritic polymer monomer, n represents the generation number of the dendritic polymer monomer, and is an integer within a range of 2-6, Y represents a group that contains SO 3 − and COO − , R 14 -R 16 can be identical to or different from each other, and are H or C 1 -C 5 alkyl respectively. The monomer can be used as a copolymerizable monomer for preparing a hyperbranched polymer applicable to oil fields, the obtained hyperbranched polymer can be used as an inhibiting filtrate reducer for drilling fluid, flocculating agent, encapsulating agent, heat-resistant and salinity-resistant polymer flooding agent, and thickening agent for fracturing liquid, etc.

First claim

The invention claimed is:

1. A dendritic polymer monomer, having a structure denoted by Z′-(Q)n-Y, wherein Z′ represents a structure denoted by the following formula (b), Q represents a dendritic constitutional repeating unit of the dendritic polymer monomer, n represents a generation number of the dendritic polymer monomer, and is an integer within a range of 2-6, and Y represents a group containing SO 3 − and COO − ,

wherein R 14 -R 16 are identical to or different from each other, and are H or C 1 -C 5 alkyl respectively.

2. The dendritic polymer monomer according to claim 1 , wherein Q has a structure denoted by the following formula (I), and Y has a structure denoted by the following formula (II),

wherein in formula (I), R 1 represents C 2 -C 5 alkylene; R 2 -R 4 can be identical to or different from each other, and are H or C 1 -C 5 alkyl respectively; in addition, for n structures denoted by formula (I), R 1 -R 4 can be identical to or different from each other;
in formula (II), R 8 -R 13 can be identical to or different from each other, and are H or C 1 -C 5 alkyl respectively; p and q can be identical to or different from each other, and are an integer within a range of 0-5 respectively; and M is H, Na, or K.

3. The dendritic polymer monomer according to claim 2 , having a structure denoted by any of the following formulae (2) and (4),

wherein R 1 -R 4 , R 8 -R 13 , M, p, and q are in the same definitions as those described in claim 2 .

4. The dendritic polymer monomer according to claim 2 , wherein R 1 is CH 2 CH 2 ; all of R 2 -R 13 are H; M is Na or K; and both p and q are 0 or 1.

5. The dendritic polymer monomer according to claim 3 , wherein R 1 is CH 2 CH 2 ; all of R 2 -R 13 are H; M is Na or K; and both p and q are 0 or 1.

6. A hyperbranched copolymer comprising dendritic structural units A, amphoteric ion structural units B, structural units C, and structural units D, and calculated in moles, a ratio of dendritic structural unit A:amphoteric ion structural unit B:structural unit C:structural unit D being 0.03-0.35:0.03-0.5:0.03-0.3:0.15-0.95, and an apparent viscosity of 1 mass % water solution of the hyperbranched copolymer being 20-60 mPa·s, wherein the dendritic structural unit A has a structure denoted by Z′-(Q)n-Y, wherein Z′ represents a structure denoted by the following formula (a1) or formula (a2), Q represents a dendritic constitutional repeating unit of the dendritic structure, n represents a generation number of the dendritic structure, and is an integer within a range of 2-6, and Y represents a group that contains SO 3 − and COO − ,

R 14 -R 16 are identical to or different from each other, and are H or C 1 -C 5 alkyl respectively;
the amphoteric ion structural unit B has a structure denoted by the following formula (b1) or formula (b2),
the structural unit C has a structure denoted by the following formula (c), and
the structural unit D has a structure denoted by the following formula (d),

in formula (b1) and formula (b2), R 1 , R 2 , R 3 , R 4 and R 5 are H or C 1 -C 3 alkyl respectively, m and n are an integer with a range of 0-5 respectively, and L is O or NH; in formula (b1), Y is COO − or SO 3 − ; in formula (b2), X − is halogen anion, and R is H, OH, C 1 -C 3 alkyl, or hydroxyl-substituted C 1 -C 3 alkyl,
in formula (c), R 6 , R 7 and R 8 are H or C 1 -C 3 alkyl respectively,
In formula (d), R 9 , R 10 , R 11 , R 12 and R 12′ are H or C 1 -C 3 alkyl respectively, T is a bond or

M 1 is H or an alkali metal element, and y is an integer within a range of 1-4.

7. The hyperbranched copolymer according to claim 6 , wherein Q has a structure denoted by the following formula (aI), and Y has a structure denoted by the following formula (aII),

wherein in formula (aI), R 1 represents C 2 -C 5 alkylene, R 2 -R 4 can be identical to or different from each other, and are H or C 1 -C 5 alkyl respectively; in addition, for n structures denoted by formula (aI), R 1 -R 4 can be identical to or different from each other;
in formula (aII), R 8 -R 13 can be identical to or different from each other, and are H or C 1 -C 5 alkyl respectively; p and q can be identical to or different from each other, and are an integer within a range of 0-5 respectively; and M is H, Na, or K.

8. The hyperbranched copolymer according to claim 7 , wherein the dendritic structural unit A has a structure denoted by any of the following formulae (A1), (A2), (A3) and A(4),

R 1 -R 4 , R 8 -R 13 , M, p, and q are in the same definitions as those described in claim 7 .

9. The hyperbranched copolymer according to claim 8 , wherein the dendritic structural unit A has a structure denoted by formula (A1) or formula (A3), and, in formula (A1) and (A3), R 1 is CH 2 CH 2 ; all of R 2 -R 4 and R 8 -R 16 are H; M is Na or K; and both p and q are 0 or 1.

10. The hyperbranched copolymer according to claim 6 , wherein the amphoteric ion structural unit B is in one or more of the structures denoted by the following formulae,

11. The hyperbranched copolymer according to claim 6 , wherein the structural unit D is in at least one of the structure denoted by the following structural formulae,

wherein M 1 is H or an alkali metal element.

12. The hyperbranched copolymer according to claim 9 , wherein the amphoteric ion structural unit B is

the structural unit C and the structural unit D are following respectively

13. The hyperbranched copolymer according to claim 6 , wherein the ratio of dendritic structural unit A:amphoteric ion structural unit B:structural unit C:structural unit D is 0.05-0.25:0.05-0.3:0.05-0.15:0.25-0.65.

14. A drilling fluid comprising a water-based CaCl 2 /polymer drilling fluid and the hyperbranched copolymer according to claim 6 .

15. A drilling fluid comprising a water-based CaCl 2 /pol

Assignees

• China Petroleum & Chem Corp
• Sinopec Zhongyuan Oilfield Service Corporation Drilling Engineering Res Institute

Inventors

• Wang Zhonghua

Classifications

• C08F222/38

  Amides · CPC title

• C09K8/12

  containing synthetic organic macromolecular compounds or their precursors · CPC title

• C08F222/06

  Maleic anhydride · CPC title

• C09K8/035

  Organic additives · CPC title

• C08F22/38

  Amides · CPC title