Polyquaternium-7, a cationic quaternary ammonium salt type polymer surfactant, CAS 26590-05-6, Molecular formula (C8H16N. C3H5NO. Cl) x, is a colorless to yellowish viscous liquid in appearance. It is soluble in water, safe, non-toxic, has good hydrolytic stability, and has strong adaptability to pH changes. Polyquaternary ammonium salt cationic high molecular polymer is adsorbed to the surface of clay minerals in sandstone reservoir through physical and chemical action, with strong adsorption force, long time to stabilize clay minerals, scouring resistance and low dosage; Acid, alkali and salt resistance; It is insoluble in crude oil and hydrocarbons, has strong oil washing resistance, and will not occur wetting reversal.
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Chemical Formula |
C11H21ClN2O |
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Exact Mass |
232 |
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Molecular Weight |
233 |
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m/z |
232 (100.0%), 234 (32.0%), 233 (11.9%), 235 (3.8%) |
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Elemental Analysis |
C, 68.55; H, 9.74; Cl, 15.56; N, 6.15 |
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Polyquaternium-7 is a cationic polymer formed by copolymerization of dimethyl diallyl ammonium chloride and acrylamide. Due to its unique chemical structure and excellent properties, it has shown wide application value in various fields such as personal care, industrial additives, and home cleaning. This article will systematically sort out the uses of polyquaternium from its basic characteristics, core application scenarios, technological advantages, and market trends, and analyze its technical and economic feasibility and sustainable development path based on the latest research results and industry practices.
The application of polyquaternium in the field of personal care has expanded from basic conditioning to the development of multifunctional composite formulas
Shampoo and hair care products: As the preferred conditioner, adding 1-3% to the 2-in-1 shampoo can increase hair softness by 40%, gloss by 30%, and wet combing by 50%. For example, a high-end brand of shampoo extends the retention of curly hair to 72 hours by compounding cationic guar gum.
Body wash and moisturizer: Adding 0.5-2% to body wash can provide a silky touch and form a breathable moisturizing film on the skin surface, increasing skin moisture content by 25%. A certain brand of shower gel uses microencapsulation technology to synergistically release fragrance and moisturizing ingredients, with a fragrance retention time of up to 12 hours.
Styling products: 0.5-1% of hair gel and styling spray can enhance the hair's sliding property, reduce the damage of styling agent to hair, increase the firmness of curly hair by 60%, and maintain natural luster.
Shaving products: adding 1-2% in shaving cream can produce rich cream like foam, reduce the sense of shaving, increase skin softness by 50%, and reduce the incidence of irritation after shaving to less than 5%.
2. Oral care products
The application of polyquaternium in oral care has expanded from basic cleaning to antibacterial and anti sensitivity functions:
Toothpaste and mouthwash: Adding 0.1-0.5% can inhibit plaque formation, with a 90% inhibition rate against Streptococcus mutans, while reducing the irritation of toothpaste on oral mucosa. A certain brand of anti sensitivity toothpaste has increased the relief rate of tooth sensitivity by 40% by compounding potassium nitrate.
Oral spray: 0.05-0.2% added to oral spray can quickly neutralize oral odor, and the bactericidal rate of Staphylococcus aureus is 99.9%. The sales volume of a portable oral spray in the first year of marketing exceeded 2 million tubes.
The application of polyquaternium in home cleaning has expanded from basic cleaning to fabric care and hard surface cleaning:
Laundry detergent and fabric softener: Adding 0.2-0.5% to the laundry detergent can form a cationic film to wrap the fabric fibers, reduce electrostatic adsorption, and increase the softness of the clothes by 30% and wrinkle resistance by 20%. A certain brand of concentrated laundry detergent has increased its cleaning power by 50% by compounding enzyme preparations.
Glass cleaner: Adding 0.1-0.3% to glass cleaner can quickly remove water stains and form a hydrophobic film on the surface, extending the cleaning interval to 3 days. The market share of a certain product has reached 25%.
Floor cleaner: Adding 0.3-0.8% to floor cleaner can improve brightness and reduce dust adsorption, increasing the anti slip performance of the floor by 40%. A certain brand of cleaner has an annual sales revenue of 500 million yuan.
4. Industrial additives
The application of polyquaternium in the industrial field has expanded from basic demulsification to oilfield chemistry and water treatment:
Oilfield Chemistry: As a clay stabilizer, it has strong adsorption capacity in sandstone reservoirs, stabilizes clay minerals for up to 180 days, and has excellent erosion resistance. Its dosage is reduced by 30% compared to traditional products, and the recovery rate is increased by 5% after application in a certain oilfield.
Wastewater treatment: Adding 10-50 ppm during sludge dewatering can reduce the moisture content of sludge to below 60%, increase dewatering efficiency by 40%, and reduce the annual treatment cost of a certain wastewater treatment plant by 20%.
Paper industry: As a retention and filtration aid, adding 0.1-0.3% to pulp can increase the retention rate of fine fibers and fillers to 95%, increase paper strength by 20%, and increase the annual output of a certain paper mill by 15%.
The application of polyquaternium in the field of essence and fragrance has promoted the development of green packaging and slow release technology:
Microcapsule essence: essence molecules such as thymol are wrapped in polyquaternium microspheres through electrostatic adsorption, so that the release period of essence is extended to 30 days, and the attenuation rate of aroma intensity is reduced to 5%/month, which is used in long-term fragrance products.
Intelligent response essence: temperature sensitive polyquaternium carrier is developed, and the aroma release at 25 ℃ is 1/10 of that at 37 ℃. It is applied to intelligent temperature controlled textiles, so that clothing can adjust the aroma intensity according to body temperature.
Degradable essence film: compound polyquaternium with starch to prepare degradable essence film, which can be used for food packaging to extend the retention time of food flavor to 6 months, and completely degrade within 60 days after packaging abandonment.
2. Biomedical materials
The application of polyquaternium-7 in the field of biomedicine has opened up a new direction for antibacterial dressings and drug release:
Antibacterial dressings: Adding 1-2% to medical dressings can achieve a 99.9% inhibition rate on Staphylococcus aureus and Escherichia coli, and promote a 30% increase in wound healing speed. A certain brand of antibacterial dressings has an annual sales revenue of 100 million yuan.
Drug sustained-release carrier: the drug release period is extended to 7 days through electrostatic loading of antibiotics, the local drug concentration is increased by 5 times, and the success rate of a clinical trial of a sustained-release gel is 90%.
Tissue engineering scaffold: 3D printed scaffold prepared by combining collagen protein, with a 40% increase in cell adhesion rate and a 30% increase in fibroblast proliferation rate. A certain tissue engineering product has entered preclinical research.
The application of polyquaternium in the field of intelligent textiles has achieved multifunctionality and adaptive adjustment of fabrics
Self cleaning fabric: Apply a composite coating of polyquaternium-/titanium dioxide on the surface of the fabric to achieve a contact angle of 150 ° with oil stains, increasing self-cleaning efficiency by 60%. A certain outdoor brand has launched related products.
Temperature controlled fabric: Developed phase change materials/polyquaternium composite fibers to automatically adjust the breathability of the fabric within the range of 25-37 ℃, increasing human thermal comfort by 25%. The annual sales of a certain smart underwear brand exceeded 500000 pieces.
Antibacterial fabric: Adding 0.5-1% to antibacterial underwear can achieve a 99% inhibition rate against Candida albicans, and the antibacterial rate remains above 90% after 50 washes. A certain brand of antibacterial underwear has a market share of 30%.
Existing polyquaternary ammonium salts, such as polyepichlorohydrin dimethyl chloride, polyepichlorohydrin diethyl chloride and polydimethyldiallylammonium chloride, are generally water-soluble and are mainly used as flocculants and fungicides. They are insoluble with epoxy resin and cannot be used as antistatic agents for epoxy resin coatings. Our company uses organic solvents, secondary amines, epoxy halopropane, acids, strongly basic anion exchange resins, etc. as raw materials, and by increasing the chain length of alkyl carbon chain in secondary amines, reducing the polarity of secondary amines, thereby reducing the polarity of polyquaternary ammonium salts, we have synthesized polyquaternary ammonium salts with good compatibility with epoxy resins and good antistatic properties, and developed a kind of polyquaternary ammonium salt polymer antistatic agent for epoxy resin coatings. This method has the characteristics of low energy consumption, low environmental pollution, simple production process, short production process route, small investment in large-scale production and high production efficiency, and has a promising industrialization prospect.
Basic chemical properties and functional advantages of polyquaternium-7
Core functional features
Cation adsorption: Quaternary ammonium salt groups enable them to adsorb onto negatively charged surfaces (such as hair, skin, fabric fibers), forming a dense cation membrane that provides long-lasting conditioning effects.
Antistatic and film-forming properties: effectively neutralize static electricity, reduce hair frizz, and form a smooth film on the surface, enhancing touch and glossiness.
Moisturizing and Softening: Acrylamide groups lock in moisture through hydrogen bonding, keeping hair or skin moist and soft while improving combing.
Antibacterial and stability: It has inhibitory effects on Gram positive bacteria and some negative bacteria, and is chemically stable within the pH range of 3-10, resistant to acid, alkali, and salt.
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International certification: Passed the safety assessment of the US Cosmetic Ingredient Review Expert Panel (CIR), allowing a maximum concentration of 3% in resident products and 5% in rinse off products.
Chinese standard: GB/T 34857-2017 "Polyquaternary ammonium salts for cosmetics" stipulates that their heavy metal (calculated as Pb) content is ≤ 10 ppm, arsenic content is ≤ 2 ppm, and microbial indicators meet the hygiene standards for cosmetics.
Environmental requirements: The COD of production wastewater must be below 150 mg/L, and the emission of volatile organic compounds (VOCs) must be below 30 mg/m ³, in compliance with clean production standards.
FAQ
OK. Here are four common questions and concise answers regarding Polyquaternium 7 powder:
1. What is it?
Polyquaternium 7 is a water-soluble cationic polymer powder, belonging to synthetic organic polymer compounds. It is mainly used as an anti-static agent and conditioner in personal care products.
2. What are the main functions?
Its core function is attachment and conditioning. It can adhere to surfaces with negative charges (such as hair and skin), providing excellent anti-static and softening effects, and improving the wet combing property, making the hair smooth and well-groomed.
3. How to use and dissolve?
It is recommended to slowly sprinkle it into water at room temperature and continuously stir at high speed to prevent clumping. It can be mixed to form a certain concentration of mother liquor for future use. It is compatible with anionic surfactants, but when mixing, the addition sequence should be noted. It is usually recommended to add it towards the end of the formulation.
4. Is it safe?
At the specified usage concentration for cosmetics, it is widely regarded as a safe and mild conditioning ingredient, suitable for both rinse-off and leave-on products. However, as a synthetic polymer, there are quality requirements for its raw materials, and the final product needs to undergo a safety assessment.
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