Modified pyridine styrene butadiene rubber latex and synthesis method and application thereof

Abstract

The invention provides modified pyridine styrene butadiene rubber latex and a synthesis method and application thereof. The modified pyridine styrene butadiene rubber latex is prepared from the following raw materials in percentage by weight: an initiator, an emulsifying agent, a dispersing agent, water and mixed monomers, wherein the dosage of the initiator is 0.2 to 0.6 percent of the weight ofthe mixed monomers; the dosage of the emulsifying agent is 1 to 2 percent of the weight of the mixed monomers; the dosage of the dispersing agent is 2 to 4 percent of the weight of the mixed monomers;the dosage of the water is 95 to 105 percent of the weight of the mixed monomer; and the mixed monomers comprise the following components in percentage by weight: 10 to 85 percent of isoprene, 0 to 50 percent of butadiene, 3 to 15 percent of acrylic ester, 2 to 5 percent of acrylic acid and 10 to 20 percent of monoolefine. The modified pyridine styrene butadiene rubber latex has high solid content, uniform latex particles and low content of residual dialkene, is nontoxic and odorless, and has simple, convenient and safe operations in production and use, good film forming property and good adhesiveness to porous materials and polymer calcic-plastic composite materials; in addition, the chemical stability, the heat resistance and the cold resistance of the modified pyridine styrene butadiene rubber latex are all superior to the conventional pyridine styrene butadiene rubber latex.

Description

technical field

[0001] The invention relates to modified styrene-butadiene latex and its synthesis method. Background technique

[0002] SBR latex is mainly used as an adhesive, widely used in paper coating and carpet backing. The currently used styrene-butadiene latex is a binary copolymer of butadiene and styrene. Its chemical stability, heat and cold resistance and film-forming properties are poor, which cannot meet the needs of high-quality products. Modified with natural rubber latex, due to protein content, it will appear rancid. In terms of cost, because the price of raw material butadiene is rising year by year, which is much higher than that of isoprene, the traditional styrene-butadiene latex is no longer competitive in terms of product cost.

[0003] Modified styrene-butadiene latex has good elasticity, wear resistance and heat resistance, and is widely used in adhesives, sealants, coatings, paints, impregnating agents and vulcanized plasticizers. Compared wit...

Examples

Embodiment 1

[0030] First, 100 milliliters of deionized water, 20 g of sodium lauryl sulfate with a weight content of 10%, and 16 g of a fatty alcohol polyoxyethylene ether solution with a weight content of 40% were added to the reaction kettle, and stirred and emulsified for 30 minutes; followed by adding 25 grams of styrene 10 grams of methyl methacrylate heated up to 40°C and continued to stir and emulsify for 30 minutes;

[0031] Then add 3g of ammonium persulfate solution with a weight content of 10%, and 3g of a sodium bisulfite solution with a weight content of 10%, and heat up to 70±2°C for 3 hours; then cool down to 20±5°C, and then add isoprene 70 grams, 30 grams of butadiene, and 5 grams of methacrylic acid. After 2 hours of reaction, the temperature was raised to 40±3°C, and the reaction was continued for 2 hours; To discharge at room temperature, the product is obtained, and the product is tested according to the SH / T 1593-1609-1994 standard, and the results are as follows:

...

Embodiment 2

[0034] Monomer formula: (weight)

[0035] Isoprene 10%, Butadiene 50%, Methacrylate 15%, Methacrylic acid 5%, Styrene 20%.

[0036] Other components and preparation method are with embodiment 1. Test result is basically the same with embodiment 1.

Embodiment 3

[0038] Monomer formula: (weight)

[0039] Isoprene 85%, methyl methacrylate 3%, methacrylic acid 2%, acrylonitrile 10%. Other components and preparation method are with embodiment 1. Test result is basically the same with embodiment 1.

technical field

[0001] The invention relates to modified styrene-butadiene latex and its synthesis method. Background technique

[0002] SBR latex is mainly used as an adhesive, widely used in paper coating and carpet backing. The currently used styrene-butadiene latex is a binary copolymer of butadiene and styrene. Its chemical stability, heat and cold resistance and film-forming properties are poor, which cannot meet the needs of high-quality products. Modified with natural rubber latex, due to protein content, it will appear rancid. In terms of cost, because the price of raw material butadiene is rising year by year, which is much higher than that of isoprene, the traditional styrene-butadiene latex is no longer competitive in terms of product cost.

[0003] Modified styrene-butadiene latex has good elasticity, wear resistance and heat resistance, and is widely used in adhesives, sealants, coatings, paints, impregnating agents and vulcanized plasticizers. Compared wit...

Examples

Embodiment 1

[0030] First, 100 milliliters of deionized water, 20 g of sodium lauryl sulfate with a weight content of 10%, and 16 g of a fatty alcohol polyoxyethylene ether solution with a weight content of 40% were added to the reaction kettle, and stirred and emulsified for 30 minutes; followed by adding 25 grams of styrene 10 grams of methyl methacrylate heated up to 40°C and continued to stir and emulsify for 30 minutes;

[0031] Then add 3g of ammonium persulfate solution with a weight content of 10%, and 3g of a sodium bisulfite solution with a weight content of 10%, and heat up to 70±2°C for 3 hours; then cool down to 20±5°C, and then add isoprene 70 grams, 30 grams of butadiene, and 5 grams of methacrylic acid. After 2 hours of reaction, the temperature was raised to 40±3°C, and the reaction was continued for 2 hours; To discharge at room temperature, the product is obtained, and the product is tested according to the SH / T 1593-1609-1994 standard, and the results are as follows:

...

Embodiment 2

[0034] Monomer formula: (weight)

[0035] Isoprene 10%, Butadiene 50%, Methacrylate 15%, Methacrylic acid 5%, Styrene 20%.

[0036] Other components and preparation method are with embodiment 1. Test result is basically the same with embodiment 1.

Embodiment 3

[0038] Monomer formula: (weight)

[0039] Isoprene 85%, methyl methacrylate 3%, methacrylic acid 2%, acrylonitrile 10%. Other components and preparation method are with embodiment 1. Test result is basically the same with embodiment 1.