CrystaSense™ HP4

1 of 9 products in this brand
CrystaSense™ HP4 is a unique patented amide polymer designed for use as a rheology modifier for medium- to high-polarity liquids in household, industrial, and institutional (I&I) applications. CrystaSense™ HP4 adds structure to surfactant and aqueous systems, as well as oil and fragrance-based formulations.

Functions: Thickener, Viscosity Modifier

Labeling Claims: Bio-based

End Uses: Hard Surface Cleaners, Household Cleaners, Industrial Cleaners, Institutional Cleaners

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Identification & Functionality

Chemical Family
Cleaning Ingredients Functions

Features & Benefits

Labeling Claims
Product Highlights
  • Used to create water-soluble rim blocks
  • Controlled dissolution rate
  • Product fully dissolves to show end-of-life
Oils & Fragrance

Air Care
All the CrystaSense rheology modifiers can be used to produce visually appealing air fresheners featuring high fragrance loading and innovative design possibilities, with steady, predictable fragrance release. The system can be used in the same way to gel insect repellents. The most suitable CrystaSense polymer depends on the polarity of the fragrance and compatibility with other formulation ingredients.

Water-Based Air Fresheners
The CrystaSense LP, MP, HP series can also be used for water-based air fresheners - CrystaSense HP5 is most suitable for this application. In water-based air fresheners water is used as a diluent and therefore the formulation has a reduced cost, as well as a potential reduction in emissions of volatile organic compounds (VOCs). Water-based air fresheners are clear and firm, and insoluble in water.

Toilet Rim Blocks
All the rheology modifiers can be used to formulate air fresheners for integration into toilet care products, such as rim blocks. Water-resistant oil-based rim blocks can be formulated using CrystaSense LP1, LP2 or LP3, and water-soluble formulations use CrystaSense HP4 or HP5. Water-soluble formulations will release active with
each flush and will eventually dissolve entirely, indicating to the consumer that the product has reached the end of its lifetime. CrystaSense HP5 gives a slower dissolution than CrystaSense HP4; therefore the dissolution rate can be controlled by a combination of the two polymers. Both formulations can be used alone in a rim
block cage or can be integrated into a dual-use formulation which contains separate bars of other water-soluble actives.

Croda CrystaSense HP4 Oils & Fragrance

Air Care
  • Used to create water-soluble rim blocks
  • Controlled dissolution rate
  • Product fully dissolves to show end-of-life
Surfactants & Aqueous Systems

Hard surface cleaners
Thickened hard surface cleaners are ideal for vertical surfaces due to the increased contact time. This allows for a reduction in surfactant levels, milder pH levels and improved consumer usability. Gelled formulations appear more concentrated and dosage can be more predictable, appealing to the consumer.

Acidic Cleaners

Thickened hard surface cleaners are valuable for household applications but also I&I applications where acidic cleaners are used on heavy duty soils such as limescale and traffic film on automotive wheels. Large areas of vertical surfaces are often difficult to clean with mechanical action, therefore any cleaning solutions need to be highly effective - increased contact time for acid cleaners will equate to cleaner surfaces. CrystaSense HP5 has been tested for compatibility with acids commonly used in industrial cleaning and has been found to be compatible with citric acid, phosphoric acid and methanesulphonic acid.

Functions

Rheology Modifiers

Applications & Uses

Markets
Applications
  • Air care
  • Toilet care
  • Hard surface cleaners
  • I&I cleaners
Recommended Uses
Air fresheners Most suitable
Water-soluble rim blocks Most suitable
Hard surface cleaners Also recommended
Acidic cleaners Also recommended
Concentrated surfactant systems Also recommended
Suspensions Also recommended

Table 2: The CrystaSense series rheology modifiers are each suited to particular uses due to their chemistry and compatibilities

Formulating

CrystaSense HP are solid colorless wax-like pastilles and therefore require heating for processing. For example, to produce an air freshener all ingredients except volatile components must be mixed and heated to at least the softening point of the CrystaSense component. The mixture is then cooled to a suitable temperature and the volatile ingredients are added. The mixture is then poured into molds; full gel strength is obtained after approximately two hours at room temperature.

Applications
  • Surface Care
  • Air care

Properties

Physical Form
Odor
Mild
Typical Properties
ValueUnitsTest Method / Conditions
TypePEPA
Color Value (Gardner)max. 6-
Acid Valuemax. 15mg KOH/gDIN EN ISO 2114
Amine Numbermax. 3-
Molecular Weight9500-
Softening Point105°C

Technical Details & Test Data

Clearly Superior Gellants
  • The CrystaSense LP, MP, HP Series consists of six unique patented amide polymers designed for use as rheology modifiers in a wide range of formulation types and formats.
  • The gellants are chemically inert and work by forming a three dimensional structure, locked in by hydrogen bonding. Oil is attracted to the fatty dimer acid chains and the hydrophobic pockets that are formed trap the oil. The strength, or hardness, of the gel is controlled by the polymer concentration and molecular weight of the gellant.
Polymer Selection

As each CrystaSense gellant has different chemistry, the series has a wide range of compatibilities with other ingredients. A suitable gel can be chosen depending on the other ingredients in the formulations, what the intended application of the product is, and the ideal physical characteristics. Figure 5 shows a variety of common ingredients and the CrystaSense amide polymer that is likely to show compatibility with that ingredient, based on polarity.

Croda CrystaSense HP4 Polymer Selection

Figure 5: Common ingredients and their compatibility with the CrystaSense HP series

The properties of gels made with CrystaSense rheology modifiers vary depending on a number of factors. Table 2 shows how the physical properties of the gels change by increasing or decreasing concentration and the molecular weight of the rheology modifier.
 

System Compatibility Decreased molecular weight = Increased compatibility
Gel Strength Increased concentration = Increased gel strength
Increased molecular weight = Increased gel strength
Gel Clarity Increased concentration = Increased gel clarity
Decreased molecular weight = Increased gel clarity

Table 4: The physical properties of gels made with the CrystaSense rheology modifiers change with varying concentrations

 

Compatibility
  • Oils & fragrance
  • Surfactants & aqueous systems
  • Acidic formulations

Packaging & Availability

Regional Availability
  • Asia
  • Europe
  • Latin America
  • North America