초록 ▼

There are disclosed polymerizable alkyl poly(oxyethylene) poly(carbonyloxyethylene)acrylates and copolymers thereof, especially stable, aqueous dispersions of water-insoluble emulsion copolymers of (1) about 10-70% by weight of (meth)acrylic, (2) about 0.5-25% by weight of an alkyl poly(oxyethylene)

There are disclosed polymerizable alkyl poly(oxyethylene) poly(carbonyloxyethylene)acrylates and copolymers thereof, especially stable, aqueous dispersions of water-insoluble emulsion copolymers of (1) about 10-70% by weight of (meth)acrylic, (2) about 0.5-25% by weight of an alkyl poly(oxyethylene) poly(carbonyloxyethylene) acrylate, and (3) at least 25% by weight, to a total of 100%, of a C1-C4 alkyl (meth)acrylate, and, optionally included in the total monomer mixture, a small amount, about 0.05-1% by weight, of a polyethylenically unsaturated monomer. The copolymers, when neutralized and solubilized by addition of an alkali, are high efficiency thickeners for aqueous systems and have improved tolerance to ionic or electrolyte content. Typical systems that can be thickened are paint latices, dye pastes for preparations, food preparations, ionic detergents, dye pastes for textiles, pharmaceuticals, and oil well drilling muds. Surfactants enhance the thickening properties afforded by the copolymers.

대표청구항 ▼

A copolymer polymerized from a monomer system comprising (1) at least about 10 weight percent of a monomer or a monomer mixture selected from the group consisting of methacrylic acid, acrylic acid, itaconic acid, acryloxypropionic acid, maleic acid, fumaric acid, citraconic acid and crotonic acid; (

A copolymer polymerized from a monomer system comprising (1) at least about 10 weight percent of a monomer or a monomer mixture selected from the group consisting of methacrylic acid, acrylic acid, itaconic acid, acryloxypropionic acid, maleic acid, fumaric acid, citraconic acid and crotonic acid; (2) about 0.5 to 25 weight percent of at least one monomer of the formula: H2C〓CH－C(O)－O－(CH2CH2－C(O)－O－)x(CH2CH2O)nR wherein: R is selected from the group consisting of alkyl, alkylaryl and polycyclic alkyl groups having 8 to 30 carbon atoms; x is a number from about 0.1 to about 10; n is a number of at least 2 and has an average value of up to 60 or more, from zero up to 50% of the (CH2CH2O)n units being substituted for by (CH2CR1HO)m units wherein R1 is C1-C2 alkyl and m is a number of at least 2 and has an average value of up to 60 or more. (3) optionally at least one copolymerizable ethylenically unsaturated monomer selected from the group consisting of compounds of the formula: H2C〓CYZ wherein (a) Y is H and Z is COOR″, C6H4R′″, CN, Cl, CONH2, OC(O)R″″OR CH〓CH2; (b) Y is C1-C4 alkyl and Z is COOR″, C6H4R′″, CN, CONH2, or CH〓CH2; or (c) Y and Z are Cl; and R″is C1-C8 alkyl or C2-C8 hydroxyalkyl or lower alkoxy(C2-C8)alkyl; R′″is H, Cl, Br, or C1-C4 alkyl; and R″″is C1-C8 alkyl; and (4) zero to 1.0 weight percent of a polyethylenically unsaturated monomer;