Cellulose acetate-propionate CAP

Peak Notation Assignment of Main Peaks Molecular Weight Retention Index Relative Intensity 

H DB unidentified. cooc4Hg dibutyl phthalate cooc4Hg (plasticizer) 256 278 1782 1981 5.9 73.4 

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Also produces cellulose acetate butyrate (CAB) and cellulose acetate propionate (CAP) mixed esters. 

From 1946 to mid-1987, Farbenfabriken Bayer AG in Germany was the European producer of cellulose acetate, cellulose acetate butyrate (CAB), and cellulose acetate propionate (CAP) before closing its faciUties. Bayer s exit from the cellulose acetate mixed esters business leaves Eastman Chemical Co. in the United States as the sole producer of CAB/CAP resins. 

Cellulose Acetate Propionate (CAP) Cellulose Acetate Butyrate (CAB)... 

Dimethyl phthalate (DMP) also has high dissolving capacity for CN. It has good compatibility with cellulose esters and are used in celluloid made fi-om CN and plastic compounds or films made from other cellulosic polymers, cellulose acetate (CA), cellulose acetate-butyrate (CAB), cellulose acetate-propionate (CAP), and cellulose propionate (CP). It is light stable but highly volatile. Diethyl phthalate (DEP) possesses properties similar to DMP and is slightly less volatile. 

Table 2.2. Properties of cellulose acetate butyrates (CAB) and cellulose acetate propionates (CAP) (Tennessee Eastman)...

Cellulose acetate propionates (CAP) have the same characteristics as CAB, including high solubility and compatibility with other resins. They also have a very low odor this is important in printing applications and in reprographic processes. Commercially available products and their typical properties are listed in Table 2.2. 

Esters of other aliphatic acids are prepared in a similar manner using the appropriate anhydride. Industrially important esters include cellulose propionate, cellulose butyrate, cellulose acetate propionate (CAP), and cellulose acetate butyrate (CAB). The mixed esters, CAP and CAB, are prepared by using a mixture of anhydrides in the desired ratios, or by reacting cellulose with propionic or butyric acid and acetic anhydride. Both reactions require sulfuric acid as a catalyst. 

Typical degrees of substitution for plastics applications [21] are DS(acetate) = 2.5 for cellulose acetate, DS(propionate) = 2.6 andDS(acetate) = 0.1 for cellulose acetate propionate (CAP), and DS(butyrate) = 1.8 and DS(acetate) = 1.1 for cellulose acetate butyrate (CAB). In the industrial process of catalysed esterification, chain scission is a competitive reaction that can, however, be fairly well controlled under appropriate conditions [22]. Degrees of polymerization of commercial products can be estimated from literature data [22-25] to be in the range of 200 to 300. 

Cellulose acetate (CA), cellulose acetate propionate (CAP), and cellulose acetate butyrate (CAB) are thermoplastic materials produced through esterification of cellulose and are used for many packaging applications. Different raw materials such as cotton, recycled paper, wood cellulose, and sugarcane are used in the production of cellulose ester biopolymers in powder form. Such cellulose ester powders in the presence of different plasticizers and additives are extruded to produce various grades of commercial cellulose plastics. Recently, Misra et al. successfully used melt intercalation technique for the fabrication of cellulose nanocomposites and studied the effect of C30B on its performance characteristics [44]. From the study, the... 

Cellulose, whose repeat structure features three hydroxyl groups, reacts with organic acids, anhydrides, and acid chlorides to form esters. Plastics from these cellulose esters are extruded into film and sheet and are injection molded to form a wide variety of parts. Cellulose esters can also be compression molded and cast from solution to form a coating. The three most industrially important cellulose ester plastics are cellulose acetate (CA), cellulose acetate butyrate (CAB), and cellulose acetate propionate (CAP), with structures as shown in Fig. 2.2. 

Tenite Polypropion Cellulose acetate-propionate, CAP Eastman Chem. Prod. 

Cellulose esters Cellulose acetate CA Cellulose acetate butyrate CAB Cellulose acetate propionate CAP also known as cellulose propionate CP Cellulose ethers Ethyl cellulose EC Benzyl cellulose. 

Cellulose acetate propionate (CAP) or cellulose propionate is an ester of cellulose made by the action of propionic acid and its anhydride on purified cellulose. It is used as the basis of thermoplastic molding material. Cellulose acetate propionate applications include lighting fixtures, safety goggles, motor covers, brush handles, face shields, and steering wheels. 

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