公开(公告)号：US20170320777A1

公开(公告)日：2017-11-09

申请号：US15144958

申请日：2016-05-03

Applicant: GCP Applied Technologies Inc.

Inventor： Lawrence L. Kuo

IPC: C04B24/26

CPC classification number: C04B24/2694 ,  C04B24/165 ,  C04B24/2647 ,  C04B24/2658 ,  C04B28/02 ,  C04B2103/302

Abstract: Methods for plasticizing cementitious mixtures having relatively high water/cement ratio (at least 0.40 or higher) are surprisingly improved in terms of dosage efficiency, compared to conventional “superplasticizer” polycarboxylate polymers, when the comb-type carboxylate copolymer is formed from two different polyether side chains, specifically selected monomer constituents: (A) first polyoxyalkylene monomer represented by structural formula (R1)(R3)C═C(R2)((CH2)m(CO)nO(CH2)o(AO)pR4) wherein (AO)p represents linear alkylene oxide and p is an integer of 5-23; (B) second polyoxyalkylene monomer represented by structural formula (R1)(R3)C═C(R2)((CH2)m(CO)nO(CH2)o(AO)qR4) wherein (AO)q represents linear alkylene oxide groups and q is an integer of 20 to 200; (C) unsaturated carboxylic acid monomer represented by (R5)(R7)C═C(R6)(C(O)OM) wherein M represents an alkali metal, and the ratio of component A to component B is 20:80 to 50:50; and, optionally, (D) a water-soluble monomer represented by (R8)(R9)C═C(R10)(X) wherein R8, R9, and R10 each represent hydrogen or methyl group, and X represents C(O)NH2, C(O)NHR11, C(O)NR12R13, OR14, SO3H, C6H4SO3H, or C(O)NHC(CH3)2CH2SO3H, or mixture thereof, wherein R11, R12, R13, and R14 each represent a C1 to C5 alkyl group.

公开(公告)号：US09624130B2

公开(公告)日：2017-04-18

申请号：US15016877

申请日：2016-02-05

Applicant: GCP Applied Technologies Inc.

Inventor： Lawrence L. Kuo ,  Keith St Jean ,  Yohannes K. Lemma ,  Nathan A. Tregger ,  Stephen P. Klaus ,  Danila F. Ferraz ,  Klaus-Alexander Rieder ,  Pierre Estephane

IPC: C08F8/34 ,  C08K3/00 ,  C04B24/12 ,  C04B24/26 ,  C04B24/06

CPC classification number: C04B24/2647 ,  C04B24/06 ,  C04B24/2658 ,  C04B24/267 ,  C04B40/0039 ,  C04B14/10 ,  C04B28/02

Abstract: The present invention provides a composition and method for modifying a hydratable cementitious composition such as concrete or mortar using at least three different, distinct carboxylate polymers, even when clay is present in the concrete or mortar that would otherwise diminish dosage efficiency of polycarboxylate polymer used as dispersant. The three polycarboxylate polymers, designated as Polymer I, Polymer II, and Polymer II, are derived from monomer Components A, B, and C wherein Component A is an unsaturated carboxylic acid, Component B is a polyoxyalkylene, and Component C is an unsaturated carboxylate ester. The component molar ratio ranges for A:B:C are different as between Polymers I and II; while a distinct component molar ratio A:B+C is identified for Polymer III. When treated with these three different polycarboxylate polymers, the hydratable cementitious composition is surprisingly enhanced in terms of initial workability and slump retention, especially if clay is present.